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• Why is the operation address incremented by two?

  - by Gavin Jones

  I am looking at a Javascript emulator of a NES to try and understand how it works. On this line: addr = this.load(opaddr+2); The opcode is incremented by two. However, the documentation (see appendix E) I'm reading says: Zero page addressing uses a single operand which serves as a pointer to an address in zero page ($0000-$00FF) where the data to be operated on can be found. By using zero page addressing, only one byte is needed for the operand, so the instruction is shorter and, therefore, faster to execute than with addressing modes which take two operands. An example of a zero page instruction is AND $12. So if the operand's argument is only one byte, shouldn't it appear directly after it, and be + 1 instead of + 2? Why +2? This is how I think it works, which may be incorrect. Suppose our memory looks like: ------------------------- | 0 | 1 | 2 | 3 | 4 | 5 | <- index ------------------------- | a | b | c | d | e | f | <- memory ------------------------- ^ \ PC and our PC is 0, pointing to a. For this cycle, we say that the opcode: var pc= 0; //for example's sake var opcode= memory[pc]; //a So shouldn't the first operand be the next slot, i.e. b? var first_operand = memory[pc + 1]; //b

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• Setting default values for object properties in AS3

  - by Paul T

  I'm an actionscript newbie so please bear with me. Below is a function, and I am curious how to set default property values for objects that are being created in a loop. In the example below, these propeties are the same for each object created in the loop: titleTextField.selectable, titleTextField.wordWrap, titleTextField.x If you pull these properties out of the loop, they are null because the TextField objects have not been created, but it seems silly to have to set them each time. What is the correct way to do this. Thanks! var titleTextFormat:TextFormat = new TextFormat(); titleTextFormat.size = 10; titleTextFormat.font = "Arial"; titleTextFormat.color = 0xfff200; for (var i=0; i<arrThumbPicList.length; i++) { var yPos = 55 * i var titleTextField:TextField = new TextField(); titleTextField.selectable = false; titleTextField.wordWrap = true; titleTextField.text = arrThumbTitles[i]; titleTextField.x = 106; titleTextField.y = 331 + yPos; container.addChild(titleTextField); titleTextField.setTextFormat(titleTextFormat); }

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• JSON element detection

  - by user3614570

  I’ve created a string… {"atts": [{"name": "wedw"}, {"type": "---"}]} I pile a bunch of these together in an array based on user input and attach them to another string to complete a JSON object that tests out as valid. So I end up with a global array called fields with a bunch of these little snippets. So how do I change the name "weds" with a new name? I’ve tried... function changefieldname(pos){ var obj = JSON.parse(jsonstring); var oldname = obj.tracelog.fields[pos].atts[0]["name"]; var newname = document.getElementById("newlogfieldname"+pos).value; fields[pos].replace(oldname, newname); //writejson(); } And a bunch of variations. I know everything is checking out correct interms of the variables pos, oldname, and newname. I also know that fields[pos] returns the string in the array I want to correct but it’s not happy. I also tried converting fields[pos] to a string, but the replace function doesn't work on it. I’m sure there is a good reason.

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• Simple Jquery function won't work

  - by stijn26

  I have following jQuery code $(document).ready(function() { for(var i=1;i<4;i++) { var img= ".img"+i; var p= ".p"+i; $(img).on("click", function(){ $(p).hide(); }); } }); Applied on the following html: <div> <article> <h1>Over mezelf <img src='images/plus.png' class='img1'/></h1> <p class='p1'>Test</p> </article> <article> <h1>Contact <img src='images/plus.png' class='img2'/></h1> <p class='p2'>Test</p> </article> <article> <h1>Website <img src='images/plus.png' class='img3'/></h1> <p class='p3'>Test</p> </article> </div> When I click on the images, the last <p> disappears, it doesn't work on the other ones.

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• Convert from c# function to javascript function

  - by socheata

  I have a function in c# that used to manipulate the string, It works well while I used in C#. Now I want to convert this function to use in javascript. This is the function in c#: public static string TrimString(string str, int lenght) { string _str = str; int _iAdditionalLenght = 0; for (int i = lenght; i < str.Length; i++) { if (_str.Substring(i, 1) == " ") break; _iAdditionalLenght++; } return str.Substring(0, str.Length < (lenght + _iAdditionalLenght) ? str.Length : (lenght + _iAdditionalLenght)); } I converted it to javascript : function TrimString(str, lengthStr) { //this is my testing 4 var _str = str; var _iAdditionalLenght = 0; for (var i = lengthStr; i < str.length; i++) { if (_str.substring(i, 1) == " ") break; _iAdditionalLenght++; } return str.substring(0, str.length < (lengthStr + _iAdditionalLenght) ? str.length : (lengthStr + _iAdditionalLenght)); } But the javascript doesn't work. Could anyone tell me, how could I do it in javascript function? Thanks you so much.

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• JQuery ajax success help

  - by Jason

  Hi all, I am implementing a "Quick delete" function into a page I am creating. The way it works is like this: 1: You click the "delete" button in the table row for the record that you want to delete. 2: The page sends a request to the ajax page and return a successfully message of "yes" or a failure message of "no". My issue is that if I get a successful message of "yes" I want to hide the row for that record. I am having issue "finding" the row using JQuery. Here is my jquery code: $(document).ready(function(){ $(".pane .btn-delete").click(function(){ var element = $(this); var del_id = element.attr("id"); var dataString = 'action=del&cid=' + del_id; if(confirm("Are you sure you want to delete this content block?")) { $("#msgbox").addClass('ajaxmsg').text('Checking permissions....').fadeIn(1000); $.ajax({ type: "get", url: "ajax/admArticles_ajax.php", data: dataString, success: function(data){ switch(data) { case "yes": $("#msgbox").addClass('ajaxmsg').text('Deleting content block....').fadeIn(1000); $(this).parents(".pane").animate({ backgroundColor: "#fbc7c7" }, "fast") .animate({ opacity: "hide" }, "slow") break case "no": $("#msgbox").removeClass().addClass('error').text('You do not have the correct permissions to delete this content....').fadeIn(1000); break default: }; } }); } return false; }); }); This is the lines of code I am using to hide the row however it is not working because I don't think $(this).parents(".pane") finds the element. $(this).parents(".pane").animate({ backgroundColor: "#fbc7c7" }, "fast") .animate({ opacity: "hide" }, "slow") Any help would be greatly appreciated. Thanks...

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• Save Cookies, Then Open Link in New Tab

  - by speedplane

  I have some javascript code that saves a cookie. However, if after saving the cookie, the user opens a new tab, it appears that the cookie is not saved. The new tab is on the same domain. Here is my cookie setting/getting code: function setCookie(c_name,value,exdays) { var exdate=new Date(); exdate.setDate(exdate.getDate() + exdays); var c_value=escape(value) + ((exdays==null) ? "" : "; expires="+exdate.toUTCString()); document.cookie=c_name + "=" + c_value; } function getCookie(c_name) { var i,x,y,ARRcookies=document.cookie.split(";"); for (i=0;i<ARRcookies.length;i++) { x=ARRcookies[i].substr(0,ARRcookies[i].indexOf("=")); y=ARRcookies[i].substr(ARRcookies[i].indexOf("=")+1); x=x.replace(/^\s+|\s+$/g,""); if (x==c_name) { return unescape(y); } } } If some javascript calls setCookie('mycookie', 1) and then the user clicks on a link where the _target is set to _blank, the cookie does not load in the new tab. So getCookie('mycookie') will not return 1. What is the problem here?

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• Basic Ajax Cache Issue

  - by michaelespinosa

  I have a single page that I need to on occasion asynchronously check the server to see if the status of the page is current (basically, Live or Offline). You will see I have a function with a var live that is set when the page initially loads. I then do an ajax request to the server to retrieve whether the status of live is true or false. I compare the initial live variable with the newly returned data json object. If they're the same I do nothing, but if there different I apply some css classes. I recursively run it with setTimeout (Is there a better way to recursively do this?). My Problem: data.live doesn't change from it's initial time it runs even when it has changed in the db. I know my mysql is working because it returs the right value on the initial load. It seems like a caching issue. Any help is greatly appreciated. function checkLive() { var live = <?=$result["live"]?>; $.ajax({ type: 'get', url: '/live/live.php', dataType: 'json', success: function(data) { console.log('checking for updates... current:' + data.live); if (data.live == live) { return; } else { var elems = $('div.player_meta, object, h3.offline_message'); if (data.live == '1') { elems.removeClass('offline').addClass('live'); } else { elems.addClass('live').addClass('offline'); } } } }); setTimeout(function() { checkLive() } ,15000); } checkLive();

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• jquery plugin: creation

  - by user1542535

  The output am expecting is an unordered list which am creating with jquery...which takes in put from a json file (which works fine when i dont create it as a plugin). Am very new with the concept of building a plugin. i've tried to create one which doesnt output my unordered list json file structure { "Categories": [ { "cat_id":"1", "name":"Main Menu1", "sub_categories":[ { "cat_id":"10", "name":" Sub Menu11", "sub_level_one_link":"http:\/\/one.com" }, my js file //create plugin jQuery.fn.emrMenu= function (options) { myoptions = jQuery.extend ({ url: "error" }, options); if (myoptions.url=="error") { alert("Error:No data recieved"); return false; } $(this).html (myoptions.url); return this.each (function () { //alert(myoptions.url+this.id); $.getJSON(myoptions.url, function(data) { $.each(data.Categories, function(i, category) { alert("test1"); //get all sub menu items in list indexes var submenudata=''; $.each(category.sub_categories, function(i, sub_categories) { submenudata += "<li><a href='"+sub_categories.sub_level_one_link+"' <span>"+sub_categories.name+"</span></a></li>"; }); var menudata ="<li id='"+category.cat_id+"' class='has-sub '><a href='#'><span>"+category.name+"</span></a><ul>"+submenudata+"</ul></li>"; //stringify unordered list and bind to div var menu="<ul>"+menudata+"</ul>"; // $(menu).appendTo("#"this.id); }); }); //alert (this.id); }); } and am calling the plugin: <script> $(document).ready(function() { $('#menu_n').emrMenu ({ url: "menu_data.json"}); }); </script> I'am pretty confused at this point any help is greatly appreciated cheers!

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• Receive Ajax and display output in a Photo?

  - by user1709469

  how to Receive Ajax and display output in a Photo? Images should be displayed inside the div tag After each of Bayer text, change the text to change the photo content The photos displayed are written in the form Thanks this code <script> function AjaxRequest() { var xmlhttp = null; if (window.XMLHttpRequest) { // code for IE7+, Firefox, Chrome, Opera, Safari xmlhttp = new XMLHttpRequest(); } // else // code for IE6, IE5 return xmlhttp; } function ajaxAction() { var font_category = document.getElementById("ajaxField").value; var xmlHttp = AjaxRequest(); xmlHttp.open("POST" , "ajax.php?message=" + message , true); xmlHttp.onreadystatechange = function() { if(xmlHttp.readyState == 1) response.innerHTML = "Loading..."; if (xmlHttp.readyState == 4 && xmlHttp.status == 200) response.innerHTML = xmlHttp.responseText; } xmlHttp.send(null); } </script> <textarea id="ajaxField12" name="message" rows="2" cols="20" value="Send" onchange="javascript:ajaxAction();"> </textarea> <div id="ajaxResponse" height="42" width="42"> </div>

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• '£' character does not seem to encode properly - expect '%a3' but get '%u00a3'

  - by user243143

  Hello, I want to send The pound sign character i.e. '£' encoded as ISO-8859-1 across the wire. I perform this by doing the following: var _encoding = Encoding.GetEncoding("iso-8859-1"); var _requestContent = _encoding.GetBytes(requestContent); var _request = (HttpWebRequest)WebRequest.Create(target); _request.Headers[HttpRequestHeader.ContentEncoding] = _encoding.WebName; _request.Method = "POST"; _request.ContentType = "application/x-www-form-urlencoded; charset=iso-8859-1"; _request.ContentLength = _requestContent.Length; _requestStream = _request.GetRequestStream(); _requestStream.Write(_requestContent, 0, _requestContent.Length); _requestStream.Flush(); _requestStream.Close(); When I put a breakpoint at the target, I expect to receive the following: '%a3', however I receive '%u00a3' instead. We have tested many odd characters, but '£' seems to be the only character where theres a problem. Does anyone know what the problem is here? - Help would be greatly appreciated... Billy

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• postfix: Temporary lookup failure

  - by mk_89

  I have followed the tutorials step by step for installing and configuring postfix https://help.ubuntu.com/community/Postfix https://help.ubuntu.com/community/PostfixBasicSetupHowto I am trying to test the services to whether Temporary lookup failure error telnet localhost 25 250 2.1.0 Ok rcpt to: fmaster@localhost 451 4.3.0 <fmaster@localhost>: Temporary lookup failure rcpt to: info@localhost 451 4.3.0 <info@localhost>: Temporary lookup failure I have tried searching the web but I have found no solutions, why am I getting this problem? mail.log Sep 24 01:03:05 bookcdb postfix/smtpd[21055]: NOQUEUE: reject: RCPT from unknown[::1]: 451 4.3.0 <info@localhost>: Temporary lookup failure; from=<root@localhost> to=<info@localhost> proto=ESMTP helo=<localhost> Sep 24 01:03:19 bookcdb postfix/smtpd[21055]: NOQUEUE: reject: RCPT from unknown[::1]: 451 4.3.0 <root@localhost>: Temporary lookup failure; from=<root@localhost> to=<root@localhost> proto=ESMTP helo=<localhost> Sep 24 01:08:19 bookcdb postfix/smtpd[21055]: timeout after RCPT from unknown[::1] Sep 24 01:08:19 bookcdb postfix/smtpd[21055]: disconnect from unknown[::1] Sep 24 01:10:49 bookcdb postfix/anvil[21059]: statistics: max connection rate 1/60s for (smtp:::1) at Sep 24 01:00:49 Sep 24 01:10:49 bookcdb postfix/anvil[21059]: statistics: max connection count 1 for (smtp:::1) at Sep 24 01:00:49 Sep 24 01:10:49 bookcdb postfix/anvil[21059]: statistics: max cache size 1 at Sep 24 01:00:49 Sep 24 01:15:36 bookcdb postfix/smtpd[22175]: error: open database /var/lib/mailman/data/aliases.db: No such file or directory Sep 24 01:15:36 bookcdb postfix/smtpd[22175]: warning: hostname localhost does not resolve to address ::1: No address associated with hostname Sep 24 01:15:36 bookcdb postfix/smtpd[22175]: connect from unknown[::1] Sep 24 01:15:55 bookcdb postfix/trivial-rewrite[22195]: error: open database /etc/postfix/transport.db: No such file or directory Sep 24 01:15:55 bookcdb postfix/trivial-rewrite[22195]: warning: hash:/etc/postfix/transport is unavailable. open database /etc/postfix/transport.db: No such file or directory Sep 24 01:15:55 bookcdb postfix/trivial-rewrite[22195]: warning: hash:/etc/postfix/transport lookup error for "*" Sep 24 01:15:55 bookcdb postfix/trivial-rewrite[22195]: warning: hash:/etc/postfix/transport is unavailable. open database /etc/postfix/transport.db: No such file or directory Sep 24 01:15:55 bookcdb postfix/trivial-rewrite[22195]: warning: hash:/etc/postfix/transport lookup error for "*" Sep 24 01:15:55 bookcdb postfix/trivial-rewrite[22195]: warning: hash:/etc/postfix/transport is unavailable. open database /etc/postfix/transport.db: No such file or directory Sep 24 01:15:55 bookcdb postfix/trivial-rewrite[22195]: warning: hash:/etc/postfix/transport lookup error for "root@localhost" Sep 24 01:15:55 bookcdb postfix/trivial-rewrite[22195]: warning: transport_maps lookup failure Sep 24 01:15:59 bookcdb postfix/trivial-rewrite[22195]: warning: hash:/etc/postfix/transport is unavailable. open database /etc/postfix/transport.db: No such file or directory Sep 24 01:15:59 bookcdb postfix/trivial-rewrite[22195]: warning: hash:/etc/postfix/transport lookup error for "fmaster@localhost" Sep 24 01:15:59 bookcdb postfix/trivial-rewrite[22195]: warning: transport_maps lookup failure Sep 24 01:15:59 bookcdb postfix/smtpd[22175]: NOQUEUE: reject: RCPT from unknown[::1]: 451 4.3.0 <fmaster@localhost>: Temporary lookup failure; from=<root@localhost> to=<fmaster@localhost> proto=ESMTP helo=<localhost> Sep 24 01:16:30 postfix/smtpd[22175]: last message repeated 5 times Sep 24 01:16:30 bookcdb postfix/smtpd[22175]: disconnect from unknown[::1] Sep 24 01:19:50 bookcdb postfix/anvil[22177]: statistics: max connection rate 1/60s for (smtp:::1) at Sep 24 01:15:36 Sep 24 01:19:50 bookcdb postfix/anvil[22177]: statistics: max connection count 1 for (smtp:::1) at Sep 24 01:15:36 Sep 24 01:19:50 bookcdb postfix/anvil[22177]: statistics: max cache size 1 at Sep 24 01:15:36 Sep 24 01:20:32 bookcdb postfix/qmgr[21039]: D0C596E0B34: from=<[email protected]>, size=442, nrcpt=1 (queue active) Sep 24 01:20:32 bookcdb postfix/qmgr[21039]: warning: connect to transport private/smtp-amavis: No such file or directory Sep 24 01:20:32 bookcdb postfix/error[22402]: D0C596E0B34: to=<[email protected]>, relay=none, delay=5369, delays=5369/0.01/0/0.09, dsn=4.3.0, status=deferred (mail transport unavailable) Sep 24 01:24:16 bookcdb postfix/smtpd[22573]: error: open database /var/lib/mailman/data/aliases.db: No such file or directory Sep 24 01:24:16 bookcdb postfix/smtpd[22573]: warning: hostname localhost does not resolve to address ::1: No address associated with hostname Sep 24 01:24:16 bookcdb postfix/smtpd[22573]: connect from unknown[::1] Sep 24 01:24:43 bookcdb postfix/trivial-rewrite[22594]: error: open database /etc/postfix/transport.db: No such file or directory Sep 24 01:24:43 bookcdb postfix/trivial-rewrite[22594]: warning: hash:/etc/postfix/transport is unavailable. open database /etc/postfix/transport.db: No such file or directory Sep 24 01:24:43 bookcdb postfix/trivial-rewrite[22594]: warning: hash:/etc/postfix/transport lookup error for "*" Sep 24 01:24:43 bookcdb postfix/trivial-rewrite[22594]: warning: hash:/etc/postfix/transport is unavailable. open database /etc/postfix/transport.db: No such file or directory Sep 24 01:24:43 bookcdb postfix/trivial-rewrite[22594]: warning: hash:/etc/postfix/transport lookup error for "*" Sep 24 01:24:43 bookcdb postfix/trivial-rewrite[22594]: warning: hash:/etc/postfix/transport is unavailable. open database /etc/postfix/transport.db: No such file or directory Sep 24 01:24:43 bookcdb postfix/trivial-rewrite[22594]: warning: hash:/etc/postfix/transport lookup error for "root@localhost" Sep 24 01:24:43 bookcdb postfix/trivial-rewrite[22594]: warning: transport_maps lookup failure Sep 24 01:25:14 bookcdb postfix/trivial-rewrite[22594]: warning: hash:/etc/postfix/transport is unavailable. open database /etc/postfix/transport.db: No such file or directory Sep 24 01:25:14 bookcdb postfix/trivial-rewrite[22594]: warning: hash:/etc/postfix/transport lookup error for "[email protected]" Sep 24 01:25:14 bookcdb postfix/trivial-rewrite[22594]: warning: transport_maps lookup failure Sep 24 01:25:14 bookcdb postfix/smtpd[22573]: NOQUEUE: reject: RCPT from unknown[::1]: 451 4.3.0 <[email protected]>: Temporary lookup failure; from=<root@localhost> to=<[email protected]> proto=ESMTP helo=<localhost> Sep 24 01:25:32 bookcdb postfix/qmgr[21039]: 2E5C36E0A07: from=<[email protected]>, size=438, nrcpt=1 (queue active) Sep 24 01:25:32 bookcdb postfix/qmgr[21039]: warning: connect to transport private/smtp-amavis: No such file or directory Sep 24 01:25:32 bookcdb postfix/qmgr[21039]: 0EA3A6E0ACC: from=<[email protected]>, size=438, nrcpt=1 (queue active) Sep 24 01:25:32 bookcdb postfix/error[22631]: 2E5C36E0A07: to=<[email protected]>, orig_to=<root>, relay=none, delay=30203, delays=30203/0.01/0/0.1, dsn=4.3.0, status=deferred (mail transport unavailable) Sep 24 01:25:32 bookcdb postfix/error[22632]: 0EA3A6E0ACC: to=<[email protected]>, orig_to=<root>, relay=none, delay=30115, delays=30115/0.01/0/0.11, dsn=4.3.0, status=deferred (mail transport unavailable) Sep 24 01:25:58 bookcdb postfix/smtpd[22573]: warning: non-SMTP command from unknown[::1]: subject: fdf Sep 24 01:25:58 bookcdb postfix/smtpd[22573]: disconnect from unknown[::1] Sep 24 01:26:01 bookcdb postfix/smtpd[22573]: warning: hostname localhost does not resolve to address ::1: No address associated with hostname Sep 24 01:26:01 bookcdb postfix/smtpd[22573]: connect from unknown[::1] Sep 24 01:26:10 bookcdb postfix/trivial-rewrite[22594]: warning: hash:/etc/postfix/transport is unavailable. open database /etc/postfix/transport.db: No such file or directory Sep 24 01:26:10 bookcdb postfix/trivial-rewrite[22594]: warning: hash:/etc/postfix/transport lookup error for "root@locahost" Sep 24 01:26:10 bookcdb postfix/trivial-rewrite[22594]: warning: transport_maps lookup failure Sep 24 01:26:37 bookcdb postfix/trivial-rewrite[22594]: warning: hash:/etc/postfix/transport is unavailable. open database /etc/postfix/transport.db: No such file or directory Sep 24 01:26:37 bookcdb postfix/trivial-rewrite[22594]: warning: hash:/etc/postfix/transport lookup error for "fmaster@localhost" Sep 24 01:26:37 bookcdb postfix/trivial-rewrite[22594]: warning: transport_maps lookup failure Sep 24 01:26:37 bookcdb postfix/smtpd[22573]: NOQUEUE: reject: RCPT from unknown[::1]: 451 4.3.0 <fmaster@localhost>: Temporary lookup failure; from=<root@locahost> to=<fmaster@localhost> proto=SMTP Sep 24 01:26:45 bookcdb postfix/smtpd[22573]: disconnect from unknown[::1] Sep 24 01:30:05 bookcdb postfix/anvil[22575]: statistics: max connection rate 1/60s for (smtp:::1) at Sep 24 01:24:16 Sep 24 01:30:05 bookcdb postfix/anvil[22575]: statistics: max connection count 1 for (smtp:::1) at Sep 24 01:24:16 Sep 24 01:30:05 bookcdb postfix/anvil[22575]: statistics: max cache size 1 at Sep 24 01:24:16 Sep 24 01:34:57 bookcdb dovecot: master: Dovecot v2.0.19 starting up (core dumps disabled) Sep 24 01:35:02 bookcdb amavis[1009]: starting. /usr/sbin/amavisd-new at mail.bookcdb.com amavisd-new-2.6.5 (20110407), Unicode aware Sep 24 01:35:02 bookcdb amavis[1009]: Perl version 5.014002 Sep 24 01:35:05 bookcdb amavis[1155]: Net::Server: Group Not Defined. Defaulting to EGID '114 114' Sep 24 01:35:05 bookcdb amavis[1155]: Net::Server: User Not Defined. Defaulting to EUID '108' Sep 24 01:35:05 bookcdb amavis[1155]: Module Amavis::Conf 2.208 Sep 24 01:35:05 bookcdb amavis[1155]: Module Archive::Zip 1.30 Sep 24 01:35:05 bookcdb amavis[1155]: Module BerkeleyDB 0.49 Sep 24 01:35:05 bookcdb amavis[1155]: Module Compress::Zlib 2.033 Sep 24 01:35:05 bookcdb amavis[1155]: Module Convert::TNEF 0.17 Sep 24 01:35:05 bookcdb amavis[1155]: Module Convert::UUlib 1.4 Sep 24 01:35:05 bookcdb amavis[1155]: Module Crypt::OpenSSL::RSA 0.27 Sep 24 01:35:05 bookcdb amavis[1155]: Module DB_File 1.821 Sep 24 01:35:05 bookcdb amavis[1155]: Module Digest::MD5 2.51 Sep 24 01:35:05 bookcdb amavis[1155]: Module Digest::SHA 5.61 Sep 24 01:35:05 bookcdb amavis[1155]: Module IO::Socket::INET6 2.69 Sep 24 01:35:05 bookcdb amavis[1155]: Module MIME::Entity 5.502 Sep 24 01:35:05 bookcdb amavis[1155]: Module MIME::Parser 5.502 Sep 24 01:35:05 bookcdb amavis[1155]: Module MIME::Tools 5.502 Sep 24 01:35:05 bookcdb amavis[1155]: Module Mail::DKIM::Signer 0.39 Sep 24 01:35:05 bookcdb amavis[1155]: Module Mail::DKIM::Verifier 0.39 Sep 24 01:35:05 bookcdb amavis[1155]: Module Mail::Header 2.08 Sep 24 01:35:05 bookcdb amavis[1155]: Module Mail::Internet 2.08 Sep 24 01:35:05 bookcdb amavis[1155]: Module Mail::SPF v2.008 Sep 24 01:35:05 bookcdb amavis[1155]: Module Mail::SpamAssassin 3.003002 Sep 24 01:35:05 bookcdb amavis[1155]: Module Net::DNS 0.66 Sep 24 01:35:05 bookcdb amavis[1155]: Module Net::Server 0.99 Sep 24 01:35:05 bookcdb amavis[1155]: Module NetAddr::IP 4.058 Sep 24 01:35:05 bookcdb amavis[1155]: Module Socket6 0.23 Sep 24 01:35:05 bookcdb amavis[1155]: Module Time::HiRes 1.972101 Sep 24 01:35:05 bookcdb amavis[1155]: Module URI 1.59 Sep 24 01:35:05 bookcdb amavis[1155]: Module Unix::Syslog 1.1 Sep 24 01:35:05 bookcdb amavis[1155]: Amavis::DB code loaded Sep 24 01:35:05 bookcdb amavis[1155]: Amavis::Cache code loaded Sep 24 01:35:05 bookcdb amavis[1155]: SQL base code NOT loaded Sep 24 01:35:05 bookcdb amavis[1155]: SQL::Log code NOT loaded Sep 24 01:35:05 bookcdb amavis[1155]: SQL::Quarantine NOT loaded Sep 24 01:35:05 bookcdb amavis[1155]: Lookup::SQL code NOT loaded Sep 24 01:35:05 bookcdb amavis[1155]: Lookup::LDAP code NOT loaded Sep 24 01:35:05 bookcdb amavis[1155]: AM.PDP-in proto code loaded Sep 24 01:35:05 bookcdb amavis[1155]: SMTP-in proto code loaded Sep 24 01:35:05 bookcdb amavis[1155]: Courier proto code NOT loaded Sep 24 01:35:05 bookcdb amavis[1155]: SMTP-out proto code loaded Sep 24 01:35:05 bookcdb amavis[1155]: Pipe-out proto code NOT loaded Sep 24 01:35:05 bookcdb amavis[1155]: BSMTP-out proto code NOT loaded Sep 24 01:35:05 bookcdb amavis[1155]: Local-out proto code loaded Sep 24 01:35:05 bookcdb amavis[1155]: OS_Fingerprint code NOT loaded Sep 24 01:35:05 bookcdb amavis[1155]: ANTI-VIRUS code loaded Sep 24 01:35:05 bookcdb amavis[1155]: ANTI-SPAM code loaded Sep 24 01:35:05 bookcdb amavis[1155]: ANTI-SPAM-EXT code NOT loaded Sep 24 01:35:05 bookcdb amavis[1155]: ANTI-SPAM-C code NOT loaded Sep 24 01:35:05 bookcdb amavis[1155]: ANTI-SPAM-SA code loaded Sep 24 01:35:05 bookcdb amavis[1155]: Unpackers code loaded Sep 24 01:35:05 bookcdb amavis[1155]: DKIM code loaded Sep 24 01:35:05 bookcdb amavis[1155]: Tools code NOT loaded Sep 24 01:35:05 bookcdb amavis[1155]: Found $file at /usr/bin/file Sep 24 01:35:05 bookcdb amavis[1155]: No $altermime, not using it Sep 24 01:35:05 bookcdb amavis[1155]: Internal decoder for .mail Sep 24 01:35:05 bookcdb amavis[1155]: No decoder for .F Sep 24 01:35:05 bookcdb amavis[1155]: Found decoder for .Z at /bin/uncompress Sep 24 01:35:05 bookcdb amavis[1155]: Internal decoder for .gz Sep 24 01:35:05 bookcdb amavis[1155]: Found decoder for .bz2 at /bin/bzip2 -d Sep 24 01:35:05 bookcdb amavis[1155]: No decoder for .lzo tried: lzop -d Sep 24 01:35:05 bookcdb amavis[1155]: No decoder for .rpm tried: rpm2cpio.pl, rpm2cpio Sep 24 01:35:05 bookcdb amavis[1155]: Found decoder for .cpio at /bin/pax Sep 24 01:35:05 bookcdb amavis[1155]: Found decoder for .tar at /bin/pax Sep 24 01:35:05 bookcdb amavis[1155]: Found decoder for .deb at /usr/bin/ar Sep 24 01:35:05 bookcdb amavis[1155]: Internal decoder for .zip Sep 24 01:35:05 bookcdb amavis[1155]: No decoder for .7z tried: 7zr, 7za, 7z Sep 24 01:35:05 bookcdb amavis[1155]: No decoder for .rar tried: unrar-free Sep 24 01:35:05 bookcdb amavis[1155]: No decoder for .arj tried: arj, unarj Sep 24 01:35:05 bookcdb amavis[1155]: No decoder for .arc tried: nomarch, arc Sep 24 01:35:05 bookcdb amavis[1155]: No decoder for .zoo tried: zoo Sep 24 01:35:05 bookcdb amavis[1155]: No decoder for .lha Sep 24 01:35:05 bookcdb amavis[1155]: No decoder for .doc tried: ripole Sep 24 01:35:05 bookcdb amavis[1155]: No decoder for .cab tried: cabextract Sep 24 01:35:05 bookcdb amavis[1155]: No decoder for .tnef Sep 24 01:35:05 bookcdb amavis[1155]: Internal decoder for .tnef Sep 24 01:35:05 bookcdb amavis[1155]: No decoder for .exe tried: unrar-free; arj, unarj Sep 24 01:35:05 bookcdb amavis[1155]: Using primary internal av scanner code for ClamAV-clamd Sep 24 01:35:05 bookcdb amavis[1155]: Found secondary av scanner ClamAV-clamscan at /usr/bin/clamscan Sep 24 01:35:05 bookcdb amavis[1155]: Creating db in /var/lib/amavis/db/; BerkeleyDB 0.49, libdb 5.1 Sep 24 01:35:05 bookcdb postgrey[1219]: Process Backgrounded Sep 24 01:35:05 bookcdb postgrey[1219]: 2012/09/24-01:35:05 postgrey (type Net::Server::Multiplex) starting! pid(1219) Sep 24 01:35:05 bookcdb postgrey[1219]: Using default listen value of 128 Sep 24 01:35:05 bookcdb postgrey[1219]: Binding to TCP port 10023 on host localhost#012 Sep 24 01:35:05 bookcdb postgrey[1219]: Setting gid to "116 116" Sep 24 01:35:05 bookcdb postgrey[1219]: Setting uid to "110" Sep 24 01:35:06 bookcdb spamd[1231]: logger: removing stderr method Sep 24 01:35:08 bookcdb spamd[1233]: spamd: server started on port 783/tcp (running version 3.3.2) Sep 24 01:35:08 bookcdb spamd[1233]: spamd: server pid: 1233 Sep 24 01:35:08 bookcdb spamd[1233]: spamd: server successfully spawned child process, pid 1238 Sep 24 01:35:08 bookcdb spamd[1233]: spamd: server successfully spawned child process, pid 1240 Sep 24 01:35:08 bookcdb spamd[1233]: prefork: child states: SI Sep 24 01:35:08 bookcdb spamd[1233]: prefork: child states: II Sep 24 01:35:15 bookcdb postfix/master[1729]: daemon started -- version 2.9.3, configuration /etc/postfix Sep 24 01:36:08 bookcdb postfix/smtpd[1995]: error: open database /var/lib/mailman/data/aliases.db: No such file or directory Sep 24 01:36:08 bookcdb postfix/smtpd[1995]: warning: hostname localhost does not resolve to address ::1: No address associated with hostname Sep 24 01:36:08 bookcdb postfix/smtpd[1995]: connect from unknown[::1] Sep 24 01:36:51 bookcdb postfix/trivial-rewrite[1999]: error: open database /etc/postfix/transport.db: No such file or directory Sep 24 01:36:51 bookcdb postfix/trivial-rewrite[1999]: warning: hash:/etc/postfix/transport is unavailable. open database /etc/postfix/transport.db: No such file or directory Sep 24 01:36:51 bookcdb postfix/trivial-rewrite[1999]: warning: hash:/etc/postfix/transport lookup error for "*" Sep 24 01:36:51 bookcdb postfix/trivial-rewrite[1999]: warning: hash:/etc/postfix/transport is unavailable. open database /etc/postfix/transport.db: No such file or directory Sep 24 01:36:51 bookcdb postfix/trivial-rewrite[1999]: warning: hash:/etc/postfix/transport lookup error for "*" Sep 24 01:36:51 bookcdb postfix/trivial-rewrite[1999]: warning: hash:/etc/postfix/transport is unavailable. open database /etc/postfix/transport.db: No such file or directory Sep 24 01:36:51 bookcdb postfix/trivial-rewrite[1999]: warning: hash:/etc/postfix/transport lookup error for "root@localhost" Sep 24 01:36:51 bookcdb postfix/trivial-rewrite[1999]: warning: transport_maps lookup failure Sep 24 01:37:00 bookcdb postfix/trivial-rewrite[1999]: warning: hash:/etc/postfix/transport is unavailable. open database /etc/postfix/transport.db: No such file or directory Sep 24 01:37:00 bookcdb postfix/trivial-rewrite[1999]: warning: hash:/etc/postfix/transport lookup error for "fmaster@localhost" Sep 24 01:37:00 bookcdb postfix/trivial-rewrite[1999]: warning: transport_maps lookup failure Sep 24 01:37:00 bookcdb postfix/smtpd[1995]: NOQUEUE: reject: RCPT from unknown[::1]: 451 4.3.0 <fmaster@localhost>: Temporary lookup failure; from=<root@localhost> to=<fmaster@localhost> proto=SMTP Sep 24 01:37:28 bookcdb dovecot: imap-login: Login: user=<mkadiri89>, method=PLAIN, rip=::1, lip=::1, mpid=2730, secured Sep 24 01:37:28 bookcdb dovecot: imap(mkadiri89): Disconnected: Logged out bytes=44/697 Sep 24 01:37:29 bookcdb dovecot: imap-login: Login: user=<mkadiri89>, method=PLAIN, rip=::1, lip=::1, mpid=2732, secured Sep 24 01:37:29 bookcdb dovecot: imap(mkadiri89): Disconnected: Logged out bytes=464/1303 Sep 24 01:37:29 bookcdb dovecot: imap-login: Login: user=<mkadiri89>, method=PLAIN, rip=::1, lip=::1, mpid=2734, secured Sep 24 01:37:29 bookcdb dovecot: imap(mkadiri89): Disconnected: Logged out bytes=117/1395 Sep 24 01:37:31 bookcdb dovecot: imap-login: Login: user=<mkadiri89>, method=PLAIN, rip=::1, lip=::1, mpid=2737, secured Sep 24 01:37:31 bookcdb dovecot: imap(mkadiri89): Disconnected: Logged out bytes=117/1395 Sep 24 01:37:49 bookcdb dovecot: imap-login: Login: user=<root>, method=PLAIN, rip=::1, lip=::1, mpid=2739, secured Sep 24 01:37:49 bookcdb dovecot: imap: Error: user root: Invalid settings in userdb: userdb returned 0 as uid Sep 24 01:37:49 bookcdb dovecot: imap: Error: Invalid user settings. Refer to server log for more information. Sep 24 01:37:54 bookcdb dovecot: imap-login: Login: user=<root>, method=PLAIN, rip=::1, lip=::1, mpid=2741, secured Sep 24 01:37:54 bookcdb dovecot: imap: Error: user root: Invalid settings in userdb: userdb returned 0 as uid Sep 24 01:37:54 bookcdb dovecot: imap: Error: Invalid user settings. Refer to server log for more information. Sep 24 01:38:04 bookcdb dovecot: imap-login: Login: user=<info>, method=PLAIN, rip=::1, lip=::1, mpid=2743, secured Sep 24 01:38:04 bookcdb dovecot: imap(info): Disconnected: Logged out bytes=44/697 Sep 24 01:38:04 bookcdb dovecot: imap-login: Login: user=<info>, method=PLAIN, rip=::1, lip=::1, mpid=2745, secured Sep 24 01:38:04 bookcdb dovecot: imap(info): Disconnected: Logged out bytes=464/1303 Sep 24 01:38:04 bookcdb dovecot: imap-login: Login: user=<info>, method=PLAIN, rip=::1, lip=::1, mpid=2747, secured Sep 24 01:38:04 bookcdb dovecot: imap(info): Disconnected: Logged out bytes=117/1395 Sep 24 01:38:55 bookcdb postfix/smtpd[1995]: disconnect from unknown[::1] Sep 24 01:38:58 bookcdb postfix/smtpd[1995]: warning: hostname localhost does not resolve to address ::1: No address associated with hostname Sep 24 01:38:58 bookcdb postfix/smtpd[1995]: connect from unknown[::1] Sep 24 01:39:11 bookcdb postfix/trivial-rewrite[1999]: warning: hash:/etc/postfix/transport is unavailable. open database /etc/postfix/transport.db: No such file or directory Sep 24 01:39:11 bookcdb postfix/trivial-rewrite[1999]: warning: hash:/etc/postfix/transport lookup error for "info@localhost" Sep 24 01:39:11 bookcdb postfix/trivial-rewrite[1999]: warning: transport_maps lookup failure Sep 24 01:39:37 bookcdb postfix/smtpd[1995]: NOQUEUE: reject: RCPT from unknown[::1]: 451 4.3.0 <fmaster@localhost>: Temporary lookup failure; from=<info@localhost> to=<fmaster@localhost> proto=SMTP Sep 24 01:39:47 bookcdb postfix/smtpd[1995]: NOQUEUE: reject: RCPT from unknown[::1]: 451 4.3.0 <fmaster@localhost>: Temporary lookup failure; from=<info@localhost> to=<fmaster@localhost> proto=SMTP Sep 24 01:40:13 bookcdb postfix/smtpd[1995]: NOQUEUE: reject: RCPT from unknown[::1]: 451 4.3.0 <info@localhost>: Temporary lookup failure; from=<info@localhost> to=<info@localhost> proto=SMTP Sep 24 01:43:08 bookcdb postfix/smtpd[1995]: disconnect from unknown[::1] Sep 24 01:46:08 bookcdb postfix/anvil[1998]: statistics: max connection rate 1/60s for (smtp:::1) at Sep 24 01:36:08 Sep 24 01:46:08 bookcdb postfix/anvil[1998]: statistics: max connection count 1 for (smtp:::1) at Sep 24 01:36:08 Sep 24 01:46:08 bookcdb postfix/anvil[1998]: statistics: max cache size 1 at Sep 24 01:36:08 Sep 24 01:48:05 bookcdb dovecot: imap-login: Login: user=<info>, method=PLAIN, rip=::1, lip=::1, mpid=2805, secured Sep 24 01:48:05 bookcdb dovecot: imap(info): Disconnected: Logged out bytes=85/681 Sep 24 01:51:30 bookcdb dovecot: imap-login: Login: user=<info>, method=PLAIN, rip=::1, lip=::1, mpid=2815, secured Sep 24 01:51:30 bookcdb dovecot: imap(info): Disconnected: Logged out bytes=117/1395 Sep 24 02:05:15 bookcdb postfix/qmgr[1745]: 2EA006E0B32: from=<[email protected]>, size=439, nrcpt=1 (queue active) Sep 24 02:05:15 bookcdb postfix/qmgr[1745]: warning: connect to transport private/smtp-amavis: No such file or directory Sep 24 02:05:15 bookcdb postfix/qmgr[1745]: E76996E09B2: from=<[email protected]>, size=439, nrcpt=1 (queue active) Sep 24 02:05:15 bookcdb postfix/error[2842]: 2EA006E0B32: to=<[email protected]>, relay=none, delay=8391, delays=8391/0.05/0/0.09, dsn=4.3.0, status=deferred (mail transport unavailable) Sep 24 02:05:16 bookcdb postfix/error[2843]: E76996E09B2: to=<[email protected]>, relay=none, delay=8416, delays=8416/0.03/0/0.11, dsn=4.3.0, status=deferred (mail transport unavailable) Sep 24 02:30:15 bookcdb postfix/qmgr[1745]: D0C596E0B34: from=<[email protected]>, size=442, nrcpt=1 (queue active) Sep 24 02:30:15 bookcdb postfix/qmgr[1745]: warning: connect to transport private/smtp-amavis: No such file or directory Sep 24 02:30:15 bookcdb postfix/error[2914]: D0C596E0B34: to=<[email protected]>, relay=none, delay=9551, delays=9551/0.01/0/0.08, dsn=4.3.0, status=deferred (mail transport unavailable) Sep 24 02:35:15 bookcdb postfix/qmgr[1745]: 2E5C36E0A07: from=<[email protected]>, size=438, nrcpt=1 (queue active) Sep 24 02:35:15 bookcdb postfix/qmgr[1745]: warning: connect to transport private/smtp-amavis: No such file or directory Sep 24 02:35:15 bookcdb postfix/qmgr[1745]: 0EA3A6E0ACC: from=<[email protected]>, size=438, nrcpt=1 (queue active) Sep 24 02:35:15 bookcdb postfix/error[2926]: 2E5C36E0A07: to=<[email protected]>, orig_to=<root>, relay=none, delay=34386, delays=34386/0.03/0/0.1, dsn=4.3.0, status=deferred (mail transport unavailable) Sep 24 02:35:15 bookcdb postfix/error[2927]: 0EA3A6E0ACC: to=<[email protected]>, orig_to=<root>, relay=none, delay=34299, delays=34298/0.02/0/0.12, dsn=4.3.0, status=deferred (mail transport unavailable) Sep 24 03:15:15 bookcdb postfix/qmgr[1745]: 2EA006E0B32: from=<[email protected]>, size=439, nrcpt=1 (queue active) Sep 24 03:15:15 bookcdb postfix/qmgr[1745]: warning: connect to transport private/smtp-amavis: No such file or directory Sep 24 03:15:15 bookcdb postfix/qmgr[1745]: E76996E09B2: from=<[email protected]>, size=439, nrcpt=1 (queue active) Sep 24 03:15:15 bookcdb postfix/error[3025]: 2EA006E0B32: to=<[email protected]>, relay=none, delay=12590, delays=12590/0.01/0/0.07, dsn=4.3.0, status=deferred (mail transport unavailable) Sep 24 03:15:15 bookcdb postfix/error[3026]: E76996E09B2: to=<[email protected]>, relay=none, delay=12616, delays=12616/0.01/0/0.09, dsn=4.3.0, status=deferred (mail transport unavailable) Sep 24 03:40:15 bookcdb postfix/qmgr[1745]: D0C596E0B34: from=<[email protected]>, size=442, nrcpt=1 (queue active) Sep 24 03:40:15 bookcdb postfix/qmgr[1745]: warning: connect to transport private/smtp-amavis: No such file or directory Sep 24 03:40:15 bookcdb postfix/error[3097]: D0C596E0B34: to=<[email protected]>, relay=none, delay=13752, delays=13752/0.01/0/0.07, dsn=4.3.0, status=deferred (mail transport unavailable) Sep 24 03:45:15 bookcdb postfix/qmgr[1745]: 2E5C36E0A07: from=<[email protected]>, size=438, nrcpt=1 (queue active) Sep 24 03:45:15 bookcdb postfix/qmgr[1745]: warning: connect to transport private/smtp-amavis: No such file or directory Sep 24 03:45:15 bookcdb postfix/qmgr[1745]: 0EA3A6E0ACC: from=<[email protected]>, size=438, nrcpt=1 (queue active) Sep 24 03:45:15 bookcdb postfix/error[3129]: 2E5C36E0A07: to=<[email protected]>, orig_to=<root>, relay=none, delay=38586, delays=38586/0.01/0/0.09, dsn=4.3.0, status=deferred (mail transport unavailable) Sep 24 03:45:15 bookcdb postfix/error[3130]: 0EA3A6E0ACC: to=<[email protected]>, orig_to=<root>, relay=none, delay=38498, delays=38498/0.01/0/0.08, dsn=4.3.0, status=deferred (mail transport unavailable) postconf -n alias_database = hash:/etc/aliases alias_maps = hash:/etc/aliases, hash:/var/lib/mailman/data/aliases append_dot_mydomain = no biff = no broken_sasl_auth_clients = yes config_directory = /etc/postfix content_filter = smtp-amavis:[127.0.0.1]:10024 home_mailbox = Maildir/ inet_interfaces = all inet_protocols = all mailbox_command = mailbox_size_limit = 0 mailman_destination_recipient_limit = 1 mydestination = server1.bookcdb.com, bookcdb.com, localhost.bookcdb.com, localho st, bookcdb.com myhostname = server1.bookcdb.com mynetworks = 127.0.0.0/8 myorigin = /etc/mailname readme_directory = no recipient_delimiter = + relay_domains = lists.bookcdb.com relayhost = smtp_tls_note_starttls_offer = yes smtp_tls_security_level = may smtp_tls_session_cache_database = btree:${data_directory}/smtp_scache smtpd_banner = $myhostname ESMTP $mail_name (Ubuntu) smtpd_recipient_restrictions = permit_sasl_authenticated,permit_mynetworks,rejec t_unauth_destination smtpd_sasl_auth_enable = yes smtpd_sasl_local_domain = smtpd_sasl_security_options = noanonymous smtpd_tls_CAfile = /etc/ssl/certs/cacert.pem smtpd_tls_auth_only = no smtpd_tls_cert_file = /etc/ssl/certs/smtpd.crt smtpd_tls_key_file = /etc/ssl/private/smtpd.key smtpd_tls_loglevel = 1 smtpd_tls_received_header = yes smtpd_tls_security_level = may smtpd_tls_session_cache_database = btree:${data_directory}/smtpd_scache smtpd_tls_session_cache_timeout = 3600s smtpd_use_tls = yes tls_random_source = dev:/dev/urandom transport_maps = hash:/etc/postfix/transport

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• Integrating HTML into Silverlight Applications

  - by dwahlin

  Looking for a way to display HTML content within a Silverlight application? If you haven’t tried doing that before it can be challenging at first until you know a few tricks of the trade.  Being able to display HTML is especially handy when you’re required to display RSS feeds (with embedded HTML), SQL Server Reporting Services reports, PDF files (not actually HTML – but the techniques discussed will work), or other HTML content.  In this post I'll discuss three options for displaying HTML content in Silverlight applications and describe how my company is using these techniques in client applications. Displaying HTML Overlays If you need to display HTML over a Silverlight application (such as an RSS feed containing HTML data in it) you’ll need to set the Silverlight control’s windowless parameter to true. This can be done using the object tag as shown next: <object data="data:application/x-silverlight-2," type="application/x-silverlight-2" width="100%" height="100%"> <param name="source" value="ClientBin/HTMLAndSilverlight.xap"/> <param name="onError" value="onSilverlightError" /> <param name="background" value="white" /> <param name="minRuntimeVersion" value="4.0.50401.0" /> <param name="autoUpgrade" value="true" /> <param name="windowless" value="true" /> <a href="http://go.microsoft.com/fwlink/?LinkID=149156&v=4.0.50401.0" style="text-decoration:none"> <img src="http://go.microsoft.com/fwlink/?LinkId=161376" alt="Get Microsoft Silverlight" style="border-style:none"/> </a> </object> By setting the control to “windowless” you can overlay HTML objects by using absolute positioning and other CSS techniques. Keep in mind that on Windows machines the windowless setting can result in a performance hit when complex animations or HD video are running since the plug-in content is displayed directly by the browser window. It goes without saying that you should only set windowless to true when you really need the functionality it offers. For example, if I want to display my blog’s RSS content on top of a Silverlight application I could set windowless to true and create a user control that grabbed the content and output it using a DataList control: <style type="text/css"> a {text-decoration:none;font-weight:bold;font-size:14pt;} </style> <div style="margin-top:10px; margin-left:10px;margin-right:5px;"> <asp:DataList ID="RSSDataList" runat="server" DataSourceID="RSSDataSource"> <ItemTemplate> <a href='<%# XPath("link") %>'><%# XPath("title") %></a> <br /> <%# XPath("description") %> <br /> </ItemTemplate> </asp:DataList> <asp:XmlDataSource ID="RSSDataSource" DataFile="http://weblogs.asp.net/dwahlin/rss.aspx" XPath="rss/channel/item" CacheDuration="60" runat="server" /> </div> The user control can then be placed in the page hosting the Silverlight control as shown below. This example adds a Close button, additional content to display in the overlay window and the HTML generated from the user control. <div id="RSSDiv"> <div style="background-color:#484848;border:1px solid black;height:35px;width:100%;"> <img alt="Close Button" align="right" src="Images/Close.png" onclick="HideOverlay();" style="cursor:pointer;" /> </div> <div style="overflow:auto;width:800px;height:565px;"> <div style="float:left;width:100px;height:103px;margin-left:10px;margin-top:5px;"> <img src="http://weblogs.asp.net/blogs/dwahlin/dan2008.jpg" style="border:1px solid Gray" /> </div> <div style="float:left;width:300px;height:103px;margin-top:5px;"> <a href="http://weblogs.asp.net/dwahlin" style="margin-left:10px;font-size:20pt;">Dan Wahlin's Blog</a> </div> <br /><br /><br /> <div style="clear:both;margin-top:20px;"> <uc:BlogRoller ID="BlogRoller" runat="server" /> </div> </div> </div> Of course, we wouldn’t want the RSS HTML content to be shown until requested. Once it’s requested the absolute position of where it should show above the Silverlight control can be set using standard CSS styles. The following ID selector named #RSSDiv handles hiding the overlay div shown above and determines where it will be display on the screen. #RSSDiv { background-color:White; position:absolute; top:100px; left:300px; width:800px; height:600px; border:1px solid black; display:none; } Now that the HTML content to display above the Silverlight control is set, how can we show it as a user clicks a HyperlinkButton or other control in the application? Fortunately, Silverlight provides an excellent HTML bridge that allows direct access to content hosted within a page. The following code shows two JavaScript functions that can be called from Siverlight to handle showing or hiding HTML overlay content. The two functions rely on jQuery (http://www.jQuery.com) to make it easy to select HTML objects and manipulate their properties: function ShowOverlay() { rssDiv.css('display', 'block'); } function HideOverlay() { rssDiv.css('display', 'none'); } Calling the ShowOverlay function is as simple as adding the following code into the Silverlight application within a button’s Click event handler: private void OverlayHyperlinkButton_Click(object sender, RoutedEventArgs e) { HtmlPage.Window.Invoke("ShowOverlay"); } The result of setting the Silverlight control’s windowless parameter to true and showing the HTML overlay content is shown in the following screenshot:   Thinking Outside the Box to Show HTML Content Setting the windowless parameter to true may not be a viable option for some Silverlight applications or you may simply want to go about showing HTML content a different way. The next technique I’ll show takes advantage of simple HTML, CSS and JavaScript code to handle showing HTML content while a Silverlight application is running in the browser. Keep in mind that with Silverlight’s HTML bridge feature you can always pop-up HTML content in a new browser window using code similar to the following: System.Windows.Browser.HtmlPage.Window.Navigate( new Uri("http://silverlight.net"), "_blank"); For this example I’ll demonstrate how to hide the Silverlight application while maximizing a container div containing the HTML content to show. This allows HTML content to take up the full screen area of the browser without having to set windowless to true and when done right can make the user feel like they never left the Silverlight application. The following HTML shows several div elements that are used to display HTML within the same browser window as the Silverlight application: <div id="JobPlanDiv"> <div style="vertical-align:middle"> <img alt="Close Button" align="right" src="Images/Close.png" onclick="HideJobPlanIFrame();" style="cursor:pointer;" /> </div> <div id="JobPlan_IFrame_Container" style="height:95%;width:100%;margin-top:37px;"></div> </div> The JobPlanDiv element acts as a container for two other divs that handle showing a close button and hosting an iframe that will be added dynamically at runtime. JobPlanDiv isn’t visible when the Silverlight application loads due to the following ID selector added into the page: #JobPlanDiv { position:absolute; background-color:#484848; overflow:hidden; left:0; top:0; height:100%; width:100%; display:none; } When the HTML content needs to be shown or hidden the JavaScript functions shown next can be used: var jobPlanIFrameID = 'JobPlan_IFrame'; var slHost = null; var jobPlanContainer = null; var jobPlanIFrameContainer = null; var rssDiv = null; $(document).ready(function () { slHost = $('#silverlightControlHost'); jobPlanContainer = $('#JobPlanDiv'); jobPlanIFrameContainer = $('#JobPlan_IFrame_Container'); rssDiv = $('#RSSDiv'); }); function ShowJobPlanIFrame(url) { jobPlanContainer.css('display', 'block'); $('<iframe id="' + jobPlanIFrameID + '" src="' + url + '" style="height:100%;width:100%;" />') .appendTo(jobPlanIFrameContainer); slHost.css('width', '0%'); } function HideJobPlanIFrame() { jobPlanContainer.css('display', 'none'); $('#' + jobPlanIFrameID).remove(); slHost.css('width', '100%'); } ShowJobPlanIFrame() handles showing the JobPlanDiv div and adding an iframe into it dynamically. Once JobPlanDiv is shown, the Silverlight control host has its width set to a value of 0% to allow the control to stay alive while making it invisible to the user. I found that this technique works better across multiple browsers as opposed to manipulating the Silverlight control host div’s display or visibility properties. Now that you’ve seen the code to handle showing and hiding the HTML content area, let’s switch focus to the Silverlight application. As a user clicks on a link such as “View Report” the ShowJobPlanIFrame() JavaScript function needs to be called. The following code handles that task: private void ReportHyperlinkButton_Click(object sender, RoutedEventArgs e) { ShowBrowser(_BaseUrl + "/Report.aspx"); } public void ShowBrowser(string url) { HtmlPage.Window.Invoke("ShowJobPlanIFrame", url); } Any URL can be passed into the ShowBrowser() method which handles invoking the JavaScript function. This includes standard web pages or even PDF files. We’ve used this technique frequently with our SmartPrint control (http://www.smartwebcontrols.com) which converts Silverlight screens into PDF documents and displays them. Here’s an example of the content generated:   Silverlight 4’s WebBrowser Control Both techniques shown to this point work well when Silverlight is running in-browser but not so well when it’s running out-of-browser since there’s no host page that you can access using the HTML bridge. Fortunately, Silverlight 4 provides a WebBrowser control that can be used to perform the same functionality quite easily. We’re currently using it in client applications to display PDF documents, SSRS reports and standard HTML content. Using the WebBrowser control simplifies the application quite a bit since no JavaScript is required if the application only runs out-of-browser. Here’s a simple example of defining the WebBrowser control in XAML. I typically define it in MainPage.xaml when a Silverlight Navigation template is used to create the project so that I can re-use the functionality across multiple screens. <Grid x:Name="WebBrowserGrid" HorizontalAlignment="Stretch" VerticalAlignment="Stretch" Visibility="Collapsed"> <StackPanel HorizontalAlignment="Stretch" VerticalAlignment="Stretch"> <Border Background="#484848" HorizontalAlignment="Stretch" Height="40"> <Image x:Name="WebBrowserImage" Width="100" Height="33" Cursor="Hand" HorizontalAlignment="Right" Source="/HTMLAndSilverlight;component/Assets/Images/Close.png" MouseLeftButtonDown="WebBrowserImage_MouseLeftButtonDown" /> </Border> <WebBrowser x:Name="JobPlanReportWebBrowser" HorizontalAlignment="Stretch" VerticalAlignment="Stretch" /> </StackPanel> </Grid> Looking through the XAML you can see that a close image is defined along with the WebBrowser control. Because the URL that the WebBrowser should navigate to isn’t known at design time no value is assigned to the control’s Source property. If the XAML shown above is left “as is” you’ll find that any HTML content assigned to the WebBrowser doesn’t display properly. This is due to no height or width being set on the control. To handle this issue the following code is added into the XAML’s code-behind file to dynamically determine the height and width of the page and assign it to the WebBrowser. This is done by handling the SizeChanged event. void MainPage_SizeChanged(object sender, SizeChangedEventArgs e) { WebBrowserGrid.Height = JobPlanReportWebBrowser.Height = ActualHeight; WebBrowserGrid.Width = JobPlanReportWebBrowser.Width = ActualWidth; } When the user wants to view HTML content they click a button which executes the code shown in next: public void ShowBrowser(string url) { if (Application.Current.IsRunningOutOfBrowser) { JobPlanReportWebBrowser.NavigateToString("<html><body><iframe src='" + url + "' style='width:100%;height:97%;' /></body></html>"); WebBrowserGrid.Visibility = Visibility.Visible; } else { HtmlPage.Window.Invoke("ShowJobPlanIFrame", url); } } private void WebBrowserImage_MouseLeftButtonDown(object sender, MouseButtonEventArgs e) { WebBrowserGrid.Visibility = Visibility.Collapsed; }   Looking through the code you’ll see that it checks to see if the Silverlight application is running out-of-browser and then either displays the WebBrowser control or runs the JavaScript function discussed earlier. Although the WebBrowser control’s Source property could be assigned the URI of the page to navigate to, by assigning HTML content using the NavigateToString() method and adding an iframe, content can be shown from any site including cross-domain sites. This is especially handy when you need to grab a page from a reporting site that’s in a different domain than the Silverlight application. Here’s an example of viewing  PDF file inside of an out-of-browser application. The first image shows the application running out-of-browser before the user clicks a PDF HyperlinkButton.  The second image shows the PDF being displayed.   While there are certainly other techniques that can be used, the ones shown here have worked well for us in different applications and provide the ability to display HTML content in-browser or out-of-browser. Feel free to add a comment if you have another tip or trick you like to use when working with HTML content in Silverlight applications.   Download Code Sample   For more information about onsite, online and video training, mentoring and consulting solutions for .NET, SharePoint or Silverlight please visit http://www.thewahlingroup.com.

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• apt-get fails to upgrade, install, remove etc

  - by Kieran Peat

  I upgraded from 11.10 to 12.04, had no issues that I noticed. Recently tried to install something via software center, but it was throwing errors. Changed to trying to sudo apt-get install instead but again no luck. I've genuinely tried as much as I know to fix this, but I can't so I figured I'd ask here. I've done sudo apt-get update successfully but sudo apt-get upgrade failed with... You might want to run ‘apt-get -f install’ to correct these. The following packages have unmet dependencies. ia32-libs-multiarch:i386 : Depends: libqtcore4:i386 but it is not installed libqt4-dbus:i386 : Depends: libqtcore4:i386 (= 4:4.8.1-0ubuntu4.1) but it is not installed libqt4-declarative:i386 : Depends: libqtcore4:i386 (= 4:4.8.1-0ubuntu4.1) but it is not installed libqt4-designer:i386 : Depends: libqtcore4:i386 (= 4:4.8.1-0ubuntu4.1) but it is not installed libqt4-network:i386 : Depends: libqtcore4:i386 (= 4:4.8.1-0ubuntu4.1) but it is not installed libqt4-opengl:i386 : Depends: libqtcore4:i386 (= 4:4.8.1-0ubuntu4.1) but it is not installed libqt4-qt3support:i386 : Depends: libqtcore4:i386 (= 4:4.8.1-0ubuntu4.1) but it is not installed libqt4-script:i386 : Depends: libqtcore4:i386 (= 4:4.8.1-0ubuntu4.1) but it is not installed libqt4-scripttools:i386 : Depends: libqtcore4:i386 (= 4:4.8.1-0ubuntu4.1) but it is not installed libqt4-sql:i386 : Depends: libqtcore4:i386 (= 4:4.8.1-0ubuntu4.1) but it is not installed libqt4-sql-mysql:i386 : Depends: libqtcore4:i386 (= 4:4.8.1-0ubuntu4.1) but it is not installed libqt4-svg:i386 : Depends: libqtcore4:i386 (= 4:4.8.1-0ubuntu4.1) but it is not installed libqt4-test:i386 : Depends: libqtcore4:i386 (= 4:4.8.1-0ubuntu4.1) but it is not installed libqt4-xml:i386 : Depends: libqtcore4:i386 (= 4:4.8.1-0ubuntu4.1) but it is not installed libqt4-xmlpatterns:i386 : Depends: libqtcore4:i386 (= 4:4.8.1-0ubuntu4.1) but it is not installed libqtgui4:i386 : Depends: libqtcore4:i386 (= 4:4.8.1-0ubuntu4.1) but it is not installed libqtwebkit4:i386 : Depends: libqtcore4:i386 (>= 4:4.8.0~) but it is not installed libssl1.0.0 : Breaks: libssl1.0.0:i386 (!= 1.0.1-4ubuntu5.2) but 1.0.0e-2ubuntu4.6 is installed libssl1.0.0:i386 : Breaks: libssl1.0.0 (!= 1.0.0e-2ubuntu4.6) but 1.0.1-4ubuntu5.2 is installed E: Unmet dependencies. Try using -f. Using sudo apt-get -f install... The following packages were automatically installed and are no longer required: libgtkmm-2.4-1c2a libgtkhtml3.14-19 libglade2-0 Use 'apt-get autoremove' to remove them. The following extra packages will be installed: libqtcore4:i386 libssl1.0.0:i386 The following NEW packages will be installed libqtcore4:i386 The following packages will be upgraded: libssl1.0.0:i386 1 upgraded, 1 newly installed, 0 to remove and 33 not upgraded. 20 not fully installed or removed. Need to get 0 B/3,063 kB of archives. After this operation, 9,044 kB of additional disk space will be used. Do you want to continue [Y/n]? y E: Internal Error, No file name for libssl1.0.0 I've tried sudo apt-get remove libssl1.0.0 and sudo apt-get remove libssl1.0.0:i386 Reading package lists... Done Building dependency tree Reading state information... Done You might want to run 'apt-get -f install' to correct these: The following packages have unmet dependencies. ia32-libs-multiarch:i386 : Depends: libqtcore4:i386 but it is not going to be installed Depends: libssl1.0.0:i386 but it is not going to be installed libcurl3:i386 : Depends: libssl1.0.0:i386 (>= 1.0.0) but it is not going to be installed libqt4-dbus:i386 : Depends: libqtcore4:i386 (= 4:4.8.1-0ubuntu4.1) but it is not going to be installed libqt4-declarative:i386 : Depends: libqtcore4:i386 (= 4:4.8.1-0ubuntu4.1) but it is not going to be installed libqt4-designer:i386 : Depends: libqtcore4:i386 (= 4:4.8.1-0ubuntu4.1) but it is not going to be installed libqt4-network:i386 : Depends: libqtcore4:i386 (= 4:4.8.1-0ubuntu4.1) but it is not going to be installed libqt4-opengl:i386 : Depends: libqtcore4:i386 (= 4:4.8.1-0ubuntu4.1) but it is not going to be installed libqt4-qt3support:i386 : Depends: libqtcore4:i386 (= 4:4.8.1-0ubuntu4.1) but it is not going to be installed libqt4-script:i386 : Depends: libqtcore4:i386 (= 4:4.8.1-0ubuntu4.1) but it is not going to be installed libqt4-scripttools:i386 : Depends: libqtcore4:i386 (= 4:4.8.1-0ubuntu4.1) but it is not going to be installed libqt4-sql:i386 : Depends: libqtcore4:i386 (= 4:4.8.1-0ubuntu4.1) but it is not going to be installed libqt4-sql-mysql:i386 : Depends: libqtcore4:i386 (= 4:4.8.1-0ubuntu4.1) but it is not going to be installed libqt4-svg:i386 : Depends: libqtcore4:i386 (= 4:4.8.1-0ubuntu4.1) but it is not going to be installed libqt4-test:i386 : Depends: libqtcore4:i386 (= 4:4.8.1-0ubuntu4.1) but it is not going to be installed libqt4-xml:i386 : Depends: libqtcore4:i386 (= 4:4.8.1-0ubuntu4.1) but it is not going to be installed libqt4-xmlpatterns:i386 : Depends: libqtcore4:i386 (= 4:4.8.1-0ubuntu4.1) but it is not going to be installed libqtgui4:i386 : Depends: libqtcore4:i386 (= 4:4.8.1-0ubuntu4.1) but it is not going to be installed libqtwebkit4:i386 : Depends: libqtcore4:i386 (>= 4:4.8.0~) but it is not going to be installed libsasl2-modules:i386 : Depends: libssl1.0.0:i386 (>= 1.0.0) but it is not going to be installed E: Unmet dependencies. Try 'apt-get -f install' with no packages (or specify a solution). I've also tried sudo apt-get dist-upgrade, sudo apt-get autoremove etc without any luck. I also tried to download the .deb and use dpkg -i, but that failed and did not fully understand the method to be honest. Edit This is in response to the comments ref: sudo apt-get install -f doesn't fix broken packages. And now? sudo dpkg --configure -a --force-all dpkg: error processing libssl1.0.0 (--configure): libssl1.0.0:amd64 1.0.1-4ubuntu5.2 cannot be configured because libssl1.0.0:i386 is in a different version (1.0.0e-2ubuntu4.6) dpkg: error processing libssl1.0.0:i386 (--configure): libssl1.0.0:i386 1.0.0e-2ubuntu4.6 cannot be configured because libssl1.0.0:amd64 is in a different version (1.0.1-4ubuntu5.2) dpkg: also configuring `libssl1.0.0:i386' (required by `ia32-libs-multiarch:i386') dpkg: error processing libssl1.0.0:i386 (--configure): libssl1.0.0:i386 1.0.0e-2ubuntu4.6 cannot be configured because libssl1.0.0:amd64 is in a different version (1.0.1-4ubuntu5.2) dpkg: also configuring `libssl1.0.0:i386' (required by `ia32-libs-multiarch:i386') dpkg: error processing libssl1.0.0:i386 (--configure): libssl1.0.0:i386 1.0.0e-2ubuntu4.6 cannot be configured because libssl1.0.0:amd64 is in a different version (1.0.1-4ubuntu5.2) dpkg: also configuring `libssl1.0.0:i386' (required by `ia32-libs-multiarch:i386') dpkg: error processing libssl1.0.0:i386 (--configure): libssl1.0.0:i386 1.0.0e-2ubuntu4.6 cannot be configured because libssl1.0.0:amd64 is in a different version (1.0.1-4ubuntu5.2) dpkg: also configuring `libssl1.0.0:i386' (required by `ia32-libs-multiarch:i386') dpkg: error processing libssl1.0.0:i386 (--configure): libssl1.0.0:i386 1.0.0e-2ubuntu4.6 cannot be configured because libssl1.0.0:amd64 is in a different version (1.0.1-4ubuntu5.2) dpkg: also configuring `libssl1.0.0:i386' (required by `ia32-libs-multiarch:i386') dpkg: error processing libssl1.0.0:i386 (--configure): libssl1.0.0:i386 1.0.0e-2ubuntu4.6 cannot be configured because libssl1.0.0:amd64 is in a different version (1.0.1-4ubuntu5.2) dpkg: also configuring `libssl1.0.0:i386' (required by `ia32-libs-multiarch:i386') dpkg: error processing libssl1.0.0:i386 (--configure): libssl1.0.0:i386 1.0.0e-2ubuntu4.6 cannot be configured because libssl1.0.0:amd64 is in a different version (1.0.1-4ubuntu5.2) dpkg: also configuring `libssl1.0.0:i386' (required by `ia32-libs-multiarch:i386') dpkg: error processing libssl1.0.0:i386 (--configure): libssl1.0.0:i386 1.0.0e-2ubuntu4.6 cannot be configured because libssl1.0.0:amd64 is in a different version (1.0.1-4ubuntu5.2) dpkg: also configuring `libssl1.0.0:i386' (required by `ia32-libs-multiarch:i386') dpkg: error processing libssl1.0.0:i386 (--configure): libssl1.0.0:i386 1.0.0e-2ubuntu4.6 cannot be configured because libssl1.0.0:amd64 is in a different version (1.0.1-4ubuntu5.2) dpkg: also configuring `libssl1.0.0:i386' (required by `ia32-libs-multiarch:i386') dpkg: error processing libssl1.0.0:i386 (--configure): libssl1.0.0:i386 1.0.0e-2ubuntu4.6 cannot be configured because libssl1.0.0:amd64 is in a different version (1.0.1-4ubuntu5.2) dpkg: also configuring `libssl1.0.0:i386' (required by `ia32-libs-multiarch:i386') dpkg: error processing libssl1.0.0:i386 (--configure): libssl1.0.0:i386 1.0.0e-2ubuntu4.6 cannot be configured because libssl1.0.0:amd64 is in a different version (1.0.1-4ubuntu5.2) dpkg: also configuring `libssl1.0.0:i386' (required by `ia32-libs-multiarch:i386') dpkg: error processing libssl1.0.0:i386 (--configure): libssl1.0.0:i386 1.0.0e-2ubuntu4.6 cannot be configured because libssl1.0.0:amd64 is in a different version (1.0.1-4ubuntu5.2) dpkg: also configuring `libssl1.0.0:i386' (required by `ia32-libs-multiarch:i386') dpkg: error processing libssl1.0.0:i386 (--configure): libssl1.0.0:i386 1.0.0e-2ubuntu4.6 cannot be configured because libssl1.0.0:amd64 is in a different version (1.0.1-4ubuntu5.2) dpkg: also configuring `libssl1.0.0:i386' (required by `ia32-libs-multiarch:i386') dpkg: error processing libssl1.0.0:i386 (--configure): libssl1.0.0:i386 1.0.0e-2ubuntu4.6 cannot be configured because libssl1.0.0:amd64 is in a different version (1.0.1-4ubuntu5.2) dpkg: also configuring `libssl1.0.0:i386' (required by `ia32-libs-multiarch:i386') dpkg: error processing libssl1.0.0:i386 (--configure): libssl1.0.0:i386 1.0.0e-2ubuntu4.6 cannot be configured because libssl1.0.0:amd64 is in a different version (1.0.1-4ubuntu5.2) dpkg: also configuring `libssl1.0.0:i386' (required by `ia32-libs-multiarch:i386') dpkg: error processing libssl1.0.0:i386 (--configure): libssl1.0.0:i386 1.0.0e-2ubuntu4.6 cannot be configured because libssl1.0.0:amd64 is in a different version (1.0.1-4ubuntu5.2) dpkg: also configuring `libssl1.0.0:i386' (required by `ia32-libs-multiarch:i386') dpkg: error processing libssl1.0.0:i386 (--configure): libssl1.0.0:i386 1.0.0e-2ubuntu4.6 cannot be configured because libssl1.0.0:amd64 is in a different version (1.0.1-4ubuntu5.2) dpkg: also configuring `libssl1.0.0:i386' (required by `ia32-libs-multiarch:i386') dpkg: error processing libssl1.0.0:i386 (--configure): libssl1.0.0:i386 1.0.0e-2ubuntu4.6 cannot be configured because libssl1.0.0:amd64 is in a different version (1.0.1-4ubuntu5.2) dpkg: also configuring `libssl1.0.0:i386' (required by `ia32-libs-multiarch:i386') dpkg: error processing libssl1.0.0:i386 (--configure): libssl1.0.0:i386 1.0.0e-2ubuntu4.6 cannot be configured because libssl1.0.0:amd64 is in a different version (1.0.1-4ubuntu5.2) dpkg: also configuring `libssl1.0.0:i386' (required by `ia32-libs-multiarch:i386') dpkg: error processing libssl1.0.0:i386 (--configure): libssl1.0.0:i386 1.0.0e-2ubuntu4.6 cannot be configured because libssl1.0.0:amd64 is in a different version (1.0.1-4ubuntu5.2) dpkg: also configuring `libssl1.0.0:i386' (required by `ia32-libs-multiarch:i386') dpkg: error processing libssl1.0.0:i386 (--configure): libssl1.0.0:i386 1.0.0e-2ubuntu4.6 cannot be configured because libssl1.0.0:amd64 is in a different version (1.0.1-4ubuntu5.2) dpkg: also configuring `libssl1.0.0:i386' (required by `ia32-libs-multiarch:i386') dpkg: error processing libssl1.0.0:i386 (--configure): libssl1.0.0:i386 1.0.0e-2ubuntu4.6 cannot be configured because libssl1.0.0:amd64 is in a different version (1.0.1-4ubuntu5.2) dpkg: also configuring `libssl1.0.0:i386' (required by `ia32-libs-multiarch:i386') dpkg: error processing libssl1.0.0:i386 (--configure): libssl1.0.0:i386 1.0.0e-2ubuntu4.6 cannot be configured because libssl1.0.0:amd64 is in a different version (1.0.1-4ubuntu5.2) dpkg: also configuring `libssl1.0.0:i386' (required by `ia32-libs-multiarch:i386') dpkg: error processing libssl1.0.0:i386 (--configure): libssl1.0.0:i386 1.0.0e-2ubuntu4.6 cannot be configured because libssl1.0.0:amd64 is in a different version (1.0.1-4ubuntu5.2) dpkg: also configuring `libssl1.0.0:i386' (required by `ia32-libs-multiarch:i386') dpkg: error processing libssl1.0.0:i386 (--configure): libssl1.0.0:i386 1.0.0e-2ubuntu4.6 cannot be configured because libssl1.0.0:amd64 is in a different version (1.0.1-4ubuntu5.2) dpkg: also configuring `libssl1.0.0:i386' (required by `ia32-libs-multiarch:i386') dpkg: error processing libssl1.0.0:i386 (--configure): libssl1.0.0:i386 1.0.0e-2ubuntu4.6 cannot be configured because libssl1.0.0:amd64 is in a different version (1.0.1-4ubuntu5.2) dpkg: also configuring `libssl1.0.0:i386' (required by `ia32-libs-multiarch:i386') dpkg: error processing libssl1.0.0:i386 (--configure): libssl1.0.0:i386 1.0.0e-2ubuntu4.6 cannot be configured because libssl1.0.0:amd64 is in a different version (1.0.1-4ubuntu5.2) dpkg: also configuring `libssl1.0.0:i386' (required by `ia32-libs-multiarch:i386') dpkg: error processing libssl1.0.0:i386 (--configure): libssl1.0.0:i386 1.0.0e-2ubuntu4.6 cannot be configured because libssl1.0.0:amd64 is in a different version (1.0.1-4ubuntu5.2) dpkg: also configuring `libssl1.0.0:i386' (required by `ia32-libs-multiarch:i386') dpkg: error processing libssl1.0.0:i386 (--configure): libssl1.0.0:i386 1.0.0e-2ubuntu4.6 cannot be configured because libssl1.0.0:amd64 is in a different version (1.0.1-4ubuntu5.2) dpkg: also configuring `libssl1.0.0:i386' (required by `ia32-libs-multiarch:i386') dpkg: error processing libssl1.0.0:i386 (--configure): libssl1.0.0:i386 1.0.0e-2ubuntu4.6 cannot be configured because libssl1.0.0:amd64 is in a different version (1.0.1-4ubuntu5.2) dpkg: also configuring `libssl1.0.0:i386' (required by `ia32-libs-multiarch:i386') dpkg: error processing libssl1.0.0:i386 (--configure): libssl1.0.0:i386 1.0.0e-2ubuntu4.6 cannot be configured because libssl1.0.0:amd64 is in a different version (1.0.1-4ubuntu5.2) dpkg: also configuring `libssl1.0.0:i386' (required by `ia32-libs-multiarch:i386') dpkg: error processing libssl1.0.0:i386 (--configure): libssl1.0.0:i386 1.0.0e-2ubuntu4.6 cannot be configured because libssl1.0.0:amd64 is in a different version (1.0.1-4ubuntu5.2) dpkg: also configuring `libssl1.0.0:i386' (required by `ia32-libs-multiarch:i386') dpkg: error processing libssl1.0.0:i386 (--configure): libssl1.0.0:i386 1.0.0e-2ubuntu4.6 cannot be configured because libssl1.0.0:amd64 is in a different version (1.0.1-4ubuntu5.2) dpkg: also configuring `libssl1.0.0:i386' (required by `ia32-libs-multiarch:i386') dpkg: error processing libssl1.0.0:i386 (--configure): libssl1.0.0:i386 1.0.0e-2ubuntu4.6 cannot be configured because libssl1.0.0:amd64 is in a different version (1.0.1-4ubuntu5.2) dpkg: also configuring `libssl1.0.0:i386' (required by `ia32-libs-multiarch:i386') dpkg: error processing libssl1.0.0:i386 (--configure): libssl1.0.0:i386 1.0.0e-2ubuntu4.6 cannot be configured because libssl1.0.0:amd64 is in a different version (1.0.1-4ubuntu5.2) dpkg: also configuring `libssl1.0.0:i386' (required by `ia32-libs-multiarch:i386') dpkg: error processing libssl1.0.0:i386 (--configure): libssl1.0.0:i386 1.0.0e-2ubuntu4.6 cannot be configured because libssl1.0.0:amd64 is in a different version (1.0.1-4ubuntu5.2) dpkg: also configuring `libssl1.0.0:i386' (required by `ia32-libs-multiarch:i386') dpkg: error processing libssl1.0.0:i386 (--configure): libssl1.0.0:i386 1.0.0e-2ubuntu4.6 cannot be configured because libssl1.0.0:amd64 is in a different version (1.0.1-4ubuntu5.2) dpkg: also configuring `libssl1.0.0:i386' (required by `ia32-libs-multiarch:i386') dpkg: error processing libssl1.0.0:i386 (--configure): libssl1.0.0:i386 1.0.0e-2ubuntu4.6 cannot be configured because libssl1.0.0:amd64 is in a different version (1.0.1-4ubuntu5.2) dpkg: also configuring `libssl1.0.0:i386' (required by `ia32-libs-multiarch:i386') dpkg: error processing libssl1.0.0:i386 (--configure): libssl1.0.0:i386 1.0.0e-2ubuntu4.6 cannot be configured because libssl1.0.0:amd64 is in a different version (1.0.1-4ubuntu5.2) dpkg: also configuring `libssl1.0.0:i386' (required by `ia32-libs-multiarch:i386') dpkg: error processing libssl1.0.0:i386 (--configure): libssl1.0.0:i386 1.0.0e-2ubuntu4.6 cannot be configured because libssl1.0.0:amd64 is in a different version (1.0.1-4ubuntu5.2) dpkg: also configuring `libssl1.0.0:i386' (required by `ia32-libs-multiarch:i386') dpkg: error processing libssl1.0.0:i386 (--configure): libssl1.0.0:i386 1.0.0e-2ubuntu4.6 cannot be configured because libssl1.0.0:amd64 is in a different version (1.0.1-4ubuntu5.2) dpkg: also configuring `libssl1.0.0:i386' (required by `ia32-libs-multiarch:i386') dpkg: error processing libssl1.0.0:i386 (--configure): libssl1.0.0:i386 1.0.0e-2ubuntu4.6 cannot be configured because libssl1.0.0:amd64 is in a different version (1.0.1-4ubuntu5.2) dpkg: also configuring `libssl1.0.0:i386' (required by `ia32-libs-multiarch:i386') dpkg: error processing libssl1.0.0:i386 (--configure): libssl1.0.0:i386 1.0.0e-2ubuntu4.6 cannot be configured because libssl1.0.0:amd64 is in a different version (1.0.1-4ubuntu5.2) dpkg: also configuring `libssl1.0.0:i386' (required by `ia32-libs-multiarch:i386') dpkg: error processing libssl1.0.0:i386 (--configure): libssl1.0.0:i386 1.0.0e-2ubuntu4.6 cannot be configured because libssl1.0.0:amd64 is in a different version (1.0.1-4ubuntu5.2) dpkg: also configuring `libssl1.0.0:i386' (required by `ia32-libs-multiarch:i386') dpkg: error processing libssl1.0.0:i386 (--configure): libssl1.0.0:i386 1.0.0e-2ubuntu4.6 cannot be configured because libssl1.0.0:amd64 is in a different version (1.0.1-4ubuntu5.2) dpkg: also configuring `libssl1.0.0:i386' (required by `ia32-libs-multiarch:i386') dpkg: error processing libssl1.0.0:i386 (--configure): libssl1.0.0:i386 1.0.0e-2ubuntu4.6 cannot be configured because libssl1.0.0:amd64 is in a different version (1.0.1-4ubuntu5.2) dpkg: also configuring `libssl1.0.0:i386' (required by `ia32-libs-multiarch:i386') dpkg: error processing libssl1.0.0:i386 (--configure): libssl1.0.0:i386 1.0.0e-2ubuntu4.6 cannot be configured because libssl1.0.0:amd64 is in a different version (1.0.1-4ubuntu5.2) dpkg: also configuring `libssl1.0.0:i386' (required by `ia32-libs-multiarch:i386') dpkg: error processing libssl1.0.0:i386 (--configure): libssl1.0.0:i386 1.0.0e-2ubuntu4.6 cannot be configured because libssl1.0.0:amd64 is in a different version (1.0.1-4ubuntu5.2) dpkg: also configuring `libssl1.0.0:i386' (required by `ia32-libs-multiarch:i386') dpkg: error processing libssl1.0.0:i386 (--configure): libssl1.0.0:i386 1.0.0e-2ubuntu4.6 cannot be configured because libssl1.0.0:amd64 is in a different version (1.0.1-4ubuntu5.2) dpkg: also configuring `libssl1.0.0:i386' (required by `ia32-libs-multiarch:i386') dpkg: error processing libssl1.0.0:i386 (--configure): libssl1.0.0:i386 1.0.0e-2ubuntu4.6 cannot be configured because libssl1.0.0:amd64 is in a different version (1.0.1-4ubuntu5.2) dpkg: too many errors, stopping Errors were encountered while processing: libssl1.0.0 libssl1.0.0:i386 ... libssl1.0.0:i386 Processing was halted because there were too many errors. Ref: Package manager doesn't work anymore moving /var/lib/kpkg/info/libssl.. kieran@kieran-EX58-UD3R:~$ sudo mv /var/lib/dpkg/info/libssl1.0.0:i386.postinst /var/lib/dpkg/info/libssl1.0.0:i386.postinst.bad kieran@kieran-EX58-UD3R:~$ sudo mv /var/lib/dpkg/info/libssl1.0.0:amd64.postinst /var/lib/dpkg/info/libssl1.0.0:amd64.postinst.bad kieran@kieran-EX58-UD3R:~$ sudo apt-get --reinstall install libssl Reading package lists... Done Building dependency tree Reading state information... Done Package libssl is not available, but is referred to by another package. This may mean that the package is missing, has been obsoleted, or is only available from another source E: Package 'libssl' has no installation candidate kieran@kieran-EX58-UD3R:~$ sudo apt-get --reinstall install libssl1.0.0 Reading package lists... Done Building dependency tree Reading state information... Done You might want to run 'apt-get -f install' to correct these: The following packages have unmet dependencies. ia32-libs-multiarch:i386 : Depends: libqtcore4:i386 but it is not going to be installed libqt4-dbus:i386 : Depends: libqtcore4:i386 (= 4:4.8.1-0ubuntu4.1) but it is not going to be installed libqt4-declarative:i386 : Depends: libqtcore4:i386 (= 4:4.8.1-0ubuntu4.1) but it is not going to be installed libqt4-designer:i386 : Depends: libqtcore4:i386 (= 4:4.8.1-0ubuntu4.1) but it is not going to be installed libqt4-network:i386 : Depends: libqtcore4:i386 (= 4:4.8.1-0ubuntu4.1) but it is not going to be installed libqt4-opengl:i386 : Depends: libqtcore4:i386 (= 4:4.8.1-0ubuntu4.1) but it is not going to be installed libqt4-qt3support:i386 : Depends: libqtcore4:i386 (= 4:4.8.1-0ubuntu4.1) but it is not going to be installed libqt4-script:i386 : Depends: libqtcore4:i386 (= 4:4.8.1-0ubuntu4.1) but it is not going to be installed libqt4-scripttools:i386 : Depends: libqtcore4:i386 (= 4:4.8.1-0ubuntu4.1) but it is not going to be installed libqt4-sql:i386 : Depends: libqtcore4:i386 (= 4:4.8.1-0ubuntu4.1) but it is not going to be installed libqt4-sql-mysql:i386 : Depends: libqtcore4:i386 (= 4:4.8.1-0ubuntu4.1) but it is not going to be installed libqt4-svg:i386 : Depends: libqtcore4:i386 (= 4:4.8.1-0ubuntu4.1) but it is not going to be installed libqt4-test:i386 : Depends: libqtcore4:i386 (= 4:4.8.1-0ubuntu4.1) but it is not going to be installed libqt4-xml:i386 : Depends: libqtcore4:i386 (= 4:4.8.1-0ubuntu4.1) but it is not going to be installed libqt4-xmlpatterns:i386 : Depends: libqtcore4:i386 (= 4:4.8.1-0ubuntu4.1) but it is not going to be installed libqtgui4:i386 : Depends: libqtcore4:i386 (= 4:4.8.1-0ubuntu4.1) but it is not going to be installed libqtwebkit4:i386 : Depends: libqtcore4:i386 (>= 4:4.8.0~) but it is not going to be installed libssl1.0.0 : Breaks: libssl1.0.0:i386 (!= 1.0.1-4ubuntu5.2) but 1.0.0e-2ubuntu4.6 is to be installed libssl1.0.0:i386 : Breaks: libssl1.0.0 (!= 1.0.0e-2ubuntu4.6) but 1.0.1-4ubuntu5.2 is to be installed E: Unmet dependencies. Try 'apt-get -f install' with no packages (or specify a solution). kieran@kieran-EX58-UD3R:~$ sudo apt-get -f install Reading package lists... Done Building dependency tree Reading state information... Done Correcting dependencies... Done The following packages were automatically installed and are no longer required: libgtkmm-2.4-1c2a libgtkhtml3.14-19 libglade2-0 Use 'apt-get autoremove' to remove them. The following extra packages will be installed: libqtcore4:i386 libssl1.0.0:i386 The following NEW packages will be installed libqtcore4:i386 The following packages will be upgraded: libssl1.0.0:i386 1 upgraded, 1 newly installed, 0 to remove and 58 not upgraded. 20 not fully installed or removed. Need to get 3,063 kB of archives. After this operation, 9,044 kB of additional disk space will be used. Do you want to continue [Y/n]? y Get:1 http://gb.archive.ubuntu.com/ubuntu/ precise-updates/main libssl1.0.0 i386 1.0.1-4ubuntu5.2 [1,002 kB] Get:2 http://gb.archive.ubuntu.com/ubuntu/ precise-updates/main libqtcore4 i386 4:4.8.1-0ubuntu4.1 [2,061 kB] Fetched 3,063 kB in 4s (731 kB/s) E: Internal Error, No file name for libssl1.0.0 ref: libssl Dependencies removing libssl1.0.0:i386 kieran@kieran-EX58-UD3R:~$ sudo apt-get remove libssl1.0.0:i386 Reading package lists... Done Building dependency tree Reading state information... Done You might want to run 'apt-get -f install' to correct these: The following packages have unmet dependencies. ia32-libs-multiarch:i386 : Depends: libqtcore4:i386 but it is not going to be installed Depends: libssl1.0.0:i386 but it is not going to be installed libcurl3:i386 : Depends: libssl1.0.0:i386 (>= 1.0.0) but it is not going to be installed libqt4-dbus:i386 : Depends: libqtcore4:i386 (= 4:4.8.1-0ubuntu4.1) but it is not going to be installed libqt4-declarative:i386 : Depends: libqtcore4:i386 (= 4:4.8.1-0ubuntu4.1) but it is not going to be installed libqt4-designer:i386 : Depends: libqtcore4:i386 (= 4:4.8.1-0ubuntu4.1) but it is not going to be installed libqt4-network:i386 : Depends: libqtcore4:i386 (= 4:4.8.1-0ubuntu4.1) but it is not going to be installed libqt4-opengl:i386 : Depends: libqtcore4:i386 (= 4:4.8.1-0ubuntu4.1) but it is not going to be installed libqt4-qt3support:i386 : Depends: libqtcore4:i386 (= 4:4.8.1-0ubuntu4.1) but it is not going to be installed libqt4-script:i386 : Depends: libqtcore4:i386 (= 4:4.8.1-0ubuntu4.1) but it is not going to be installed libqt4-scripttools:i386 : Depends: libqtcore4:i386 (= 4:4.8.1-0ubuntu4.1) but it is not going to be installed libqt4-sql:i386 : Depends: libqtcore4:i386 (= 4:4.8.1-0ubuntu4.1) but it is not going to be installed libqt4-sql-mysql:i386 : Depends: libqtcore4:i386 (= 4:4.8.1-0ubuntu4.1) but it is not going to be installed libqt4-svg:i386 : Depends: libqtcore4:i386 (= 4:4.8.1-0ubuntu4.1) but it is not going to be installed libqt4-test:i386 : Depends: libqtcore4:i386 (= 4:4.8.1-0ubuntu4.1) but it is not going to be installed libqt4-xml:i386 : Depends: libqtcore4:i386 (= 4:4.8.1-0ubuntu4.1) but it is not going to be installed libqt4-xmlpatterns:i386 : Depends: libqtcore4:i386 (= 4:4.8.1-0ubuntu4.1) but it is not going to be installed libqtgui4:i386 : Depends: libqtcore4:i386 (= 4:4.8.1-0ubuntu4.1) but it is not going to be installed libqtwebkit4:i386 : Depends: libqtcore4:i386 (>= 4:4.8.0~) but it is not going to be installed libsasl2-modules:i386 : Depends: libssl1.0.0:i386 (>= 1.0.0) but it is not going to be installed E: Unmet dependencies. Try 'apt-get -f install' with no packages (or specify a solution).

  Read the article

• Dynamically loading Assemblies to reduce Runtime Depencies

  - by Rick Strahl

  I've been working on a request to the West Wind Application Configuration library to add JSON support. The config library is a very easy to use code-first approach to configuration: You create a class that holds the configuration data that inherits from a base configuration class, and then assign a persistence provider at runtime that determines where and how the configuration data is store. Currently the library supports .NET Configuration stores (web.config/app.config), XML files, SQL records and string storage.About once a week somebody asks me about JSON support and I've deflected this question for the longest time because frankly I think that JSON as a configuration store doesn't really buy a heck of a lot over XML. Both formats require the user to perform some fixup of the plain configuration data - in XML into XML tags, with JSON using JSON delimiters for properties and property formatting rules. Sure JSON is a little less verbose and maybe a little easier to read if you have hierarchical data, but overall the differences are pretty minor in my opinion. And yet - the requests keep rolling in.Hard Link Issues in a Component LibraryAnother reason I've been hesitant is that I really didn't want to pull in a dependency on an external JSON library - in this case JSON.NET - into the core library. If you're not using JSON.NET elsewhere I don't want a user to have to require a hard dependency on JSON.NET unless they want to use the JSON feature. JSON.NET is also sensitive to versions and doesn't play nice with multiple versions when hard linked. For example, when you have a reference to V4.4 in your project but the host application has a reference to version 4.5 you can run into assembly load problems. NuGet's Update-Package can solve some of this *if* you can recompile, but that's not ideal for a component that's supposed to be just plug and play. This is no criticism of JSON.NET - this really applies to any dependency that might change.  So hard linking the DLL can be problematic for a number reasons, but the primary reason is to not force loading of JSON.NET unless you actually need it when you use the JSON configuration features of the library.Enter Dynamic LoadingSo rather than adding an assembly reference to the project, I decided that it would be better to dynamically load the DLL at runtime and then use dynamic typing to access various classes. This allows me to run without a hard assembly reference and allows more flexibility with version number differences now and in the future.But there are also a couple of downsides:No assembly reference means only dynamic access - no compiler type checking or IntellisenseRequirement for the host application to have reference to JSON.NET or else get runtime errorsThe former is minor, but the latter can be problematic. Runtime errors are always painful, but in this case I'm willing to live with this. If you want to use JSON configuration settings JSON.NET needs to be loaded in the project. If this is a Web project, it'll likely be there already.So there are a few things that are needed to make this work:Dynamically create an instance and optionally attempt to load an Assembly (if not loaded)Load types into dynamic variablesUse Reflection for a few tasks like statics/enumsThe dynamic keyword in C# makes the formerly most difficult Reflection part - method calls and property assignments - fairly painless. But as cool as dynamic is it doesn't handle all aspects of Reflection. Specifically it doesn't deal with object activation, truly dynamic (string based) member activation or accessing of non instance members, so there's still a little bit of work left to do with Reflection.Dynamic Object InstantiationThe first step in getting the process rolling is to instantiate the type you need to work with. This might be a two step process - loading the instance from a string value, since we don't have a hard type reference and potentially having to load the assembly. Although the host project might have a reference to JSON.NET, that instance might have not been loaded yet since it hasn't been accessed yet. In ASP.NET this won't be a problem, since ASP.NET preloads all referenced assemblies on AppDomain startup, but in other executable project, assemblies are just in time loaded only when they are accessed.Instantiating a type is a two step process: Finding the type reference and then activating it. Here's the generic code out of my ReflectionUtils library I use for this:/// <summary> /// Creates an instance of a type based on a string. Assumes that the type's /// </summary> /// <param name="typeName">Common name of the type</param> /// <param name="args">Any constructor parameters</param> /// <returns></returns> public static object CreateInstanceFromString(string typeName, params object[] args) { object instance = null; Type type = null; try { type = GetTypeFromName(typeName); if (type == null) return null; instance = Activator.CreateInstance(type, args); } catch { return null; } return instance; } /// <summary> /// Helper routine that looks up a type name and tries to retrieve the /// full type reference in the actively executing assemblies. /// </summary> /// <param name="typeName"></param> /// <returns></returns> public static Type GetTypeFromName(string typeName) { Type type = null; // Let default name binding find it type = Type.GetType(typeName, false); if (type != null) return type; // look through assembly list var assemblies = AppDomain.CurrentDomain.GetAssemblies(); // try to find manually foreach (Assembly asm in assemblies) { type = asm.GetType(typeName, false); if (type != null) break; } return type; } To use this for loading JSON.NET I have a small factory function that instantiates JSON.NET and sets a bunch of configuration settings on the generated object. The startup code also looks for failure and tries loading up the assembly when it fails since that's the main reason the load would fail. Finally it also caches the loaded instance for reuse (according to James the JSON.NET instance is thread safe and quite a bit faster when cached). Here's what the factory function looks like in JsonSerializationUtils:/// <summary> /// Dynamically creates an instance of JSON.NET /// </summary> /// <param name="throwExceptions">If true throws exceptions otherwise returns null</param> /// <returns>Dynamic JsonSerializer instance</returns> public static dynamic CreateJsonNet(bool throwExceptions = true) { if (JsonNet != null) return JsonNet; lock (SyncLock) { if (JsonNet != null) return JsonNet; // Try to create instance dynamic json = ReflectionUtils.CreateInstanceFromString("Newtonsoft.Json.JsonSerializer"); if (json == null) { try { var ass = AppDomain.CurrentDomain.Load("Newtonsoft.Json"); json = ReflectionUtils.CreateInstanceFromString("Newtonsoft.Json.JsonSerializer"); } catch (Exception ex) { if (throwExceptions) throw; return null; } } if (json == null) return null; json.ReferenceLoopHandling = (dynamic) ReflectionUtils.GetStaticProperty("Newtonsoft.Json.ReferenceLoopHandling", "Ignore"); // Enums as strings in JSON dynamic enumConverter = ReflectionUtils.CreateInstanceFromString("Newtonsoft.Json.Converters.StringEnumConverter"); json.Converters.Add(enumConverter); JsonNet = json; } return JsonNet; }This code's purpose is to return a fully configured JsonSerializer instance. As you can see the code tries to create an instance and when it fails tries to load the assembly, and then re-tries loading.Once the instance is loaded some configuration occurs on it. Specifically I set the ReferenceLoopHandling option to not blow up immediately when circular references are encountered. There are a host of other small config setting that might be useful to set, but the default seem to be good enough in recent versions. Note that I'm setting ReferenceLoopHandling which requires an Enum value to be set. There's no real easy way (short of using the cardinal numeric value) to set a property or pass parameters from static values or enums. This means I still need to use Reflection to make this work. I'm using the same ReflectionUtils class I previously used to handle this for me. The function looks up the type and then uses Type.InvokeMember() to read the static property.Another feature I need is have Enum values serialized as strings rather than numeric values which is the default. To do this I can use the StringEnumConverter to convert enums to strings by adding it to the Converters collection.As you can see there's still a bit of Reflection to be done even in C# 4+ with dynamic, but with a few helpers this process is relatively painless.Doing the actual JSON ConversionFinally I need to actually do my JSON conversions. For the Utility class I need serialization that works for both strings and files so I created four methods that handle these tasks two each for serialization and deserialization for string and file.Here's what the File Serialization looks like:/// <summary> /// Serializes an object instance to a JSON file. /// </summary> /// <param name="value">the value to serialize</param> /// <param name="fileName">Full path to the file to write out with JSON.</param> /// <param name="throwExceptions">Determines whether exceptions are thrown or false is returned</param> /// <param name="formatJsonOutput">if true pretty-formats the JSON with line breaks</param> /// <returns>true or false</returns> public static bool SerializeToFile(object value, string fileName, bool throwExceptions = false, bool formatJsonOutput = false) { dynamic writer = null; FileStream fs = null; try { Type type = value.GetType(); var json = CreateJsonNet(throwExceptions); if (json == null) return false; fs = new FileStream(fileName, FileMode.Create); var sw = new StreamWriter(fs, Encoding.UTF8); writer = Activator.CreateInstance(JsonTextWriterType, sw); if (formatJsonOutput) writer.Formatting = (dynamic)Enum.Parse(FormattingType, "Indented"); writer.QuoteChar = '"'; json.Serialize(writer, value); } catch (Exception ex) { Debug.WriteLine("JsonSerializer Serialize error: " + ex.Message); if (throwExceptions) throw; return false; } finally { if (writer != null) writer.Close(); if (fs != null) fs.Close(); } return true; }You can see more of the dynamic invocation in this code. First I grab the dynamic JsonSerializer instance using the CreateJsonNet() method shown earlier which returns a dynamic. I then create a JsonTextWriter and configure a couple of enum settings on it, and then call Serialize() on the serializer instance with the JsonTextWriter that writes the output to disk. Although this code is dynamic it's still fairly short and readable.For full circle operation here's the DeserializeFromFile() version:/// <summary> /// Deserializes an object from file and returns a reference. /// </summary> /// <param name="fileName">name of the file to serialize to</param> /// <param name="objectType">The Type of the object. Use typeof(yourobject class)</param> /// <param name="binarySerialization">determines whether we use Xml or Binary serialization</param> /// <param name="throwExceptions">determines whether failure will throw rather than return null on failure</param> /// <returns>Instance of the deserialized object or null. Must be cast to your object type</returns> public static object DeserializeFromFile(string fileName, Type objectType, bool throwExceptions = false) { dynamic json = CreateJsonNet(throwExceptions); if (json == null) return null; object result = null; dynamic reader = null; FileStream fs = null; try { fs = new FileStream(fileName, FileMode.Open, FileAccess.Read); var sr = new StreamReader(fs, Encoding.UTF8); reader = Activator.CreateInstance(JsonTextReaderType, sr); result = json.Deserialize(reader, objectType); reader.Close(); } catch (Exception ex) { Debug.WriteLine("JsonNetSerialization Deserialization Error: " + ex.Message); if (throwExceptions) throw; return null; } finally { if (reader != null) reader.Close(); if (fs != null) fs.Close(); } return result; }This code is a little more compact since there are no prettifying options to set. Here JsonTextReader is created dynamically and it receives the output from the Deserialize() operation on the serializer.You can take a look at the full JsonSerializationUtils.cs file on GitHub to see the rest of the operations, but the string operations are very similar - the code is fairly repetitive.These generic serialization utilities isolate the dynamic serialization logic that has to deal with the dynamic nature of JSON.NET, and any code that uses these functions is none the wiser that JSON.NET is dynamically loaded.Using the JsonSerializationUtils WrapperThe final consumer of the SerializationUtils wrapper is an actual ConfigurationProvider, that is responsible for handling reading and writing JSON values to and from files. The provider is simple a small wrapper around the SerializationUtils component and there's very little code to make this work now:The whole provider looks like this:/// <summary> /// Reads and Writes configuration settings in .NET config files and /// sections. Allows reading and writing to default or external files /// and specification of the configuration section that settings are /// applied to. /// </summary> public class JsonFileConfigurationProvider<TAppConfiguration> : ConfigurationProviderBase<TAppConfiguration> where TAppConfiguration: AppConfiguration, new() { /// <summary> /// Optional - the Configuration file where configuration settings are /// stored in. If not specified uses the default Configuration Manager /// and its default store. /// </summary> public string JsonConfigurationFile { get { return _JsonConfigurationFile; } set { _JsonConfigurationFile = value; } } private string _JsonConfigurationFile = string.Empty; public override bool Read(AppConfiguration config) { var newConfig = JsonSerializationUtils.DeserializeFromFile(JsonConfigurationFile, typeof(TAppConfiguration)) as TAppConfiguration; if (newConfig == null) { if(Write(config)) return true; return false; } DecryptFields(newConfig); DataUtils.CopyObjectData(newConfig, config, "Provider,ErrorMessage"); return true; } /// <summary> /// Return /// </summary> /// <typeparam name="TAppConfig"></typeparam> /// <returns></returns> public override TAppConfig Read<TAppConfig>() { var result = JsonSerializationUtils.DeserializeFromFile(JsonConfigurationFile, typeof(TAppConfig)) as TAppConfig; if (result != null) DecryptFields(result); return result; } /// <summary> /// Write configuration to XmlConfigurationFile location /// </summary> /// <param name="config"></param> /// <returns></returns> public override bool Write(AppConfiguration config) { EncryptFields(config); bool result = JsonSerializationUtils.SerializeToFile(config, JsonConfigurationFile,false,true); // Have to decrypt again to make sure the properties are readable afterwards DecryptFields(config); return result; } }This incidentally demonstrates how easy it is to create a new provider for the West Wind Application Configuration component. Simply implementing 3 methods will do in most cases.Note this code doesn't have any dynamic dependencies - all that's abstracted away in the JsonSerializationUtils(). From here on, serializing JSON is just a matter of calling the static methods on the SerializationUtils class.Already, there are several other places in some other tools where I use JSON serialization this is coming in very handy. With a couple of lines of code I was able to add JSON.NET support to an older AJAX library that I use replacing quite a bit of code that was previously in use. And for any other manual JSON operations (in a couple of apps I use JSON Serialization for 'blob' like document storage) this is also going to be handy.Performance?Some of you might be thinking that using dynamic and Reflection can't be good for performance. And you'd be right… In performing some informal testing it looks like the performance of the native code is nearly twice as fast as the dynamic code. Most of the slowness is attributable to type lookups. To test I created a native class that uses an actual reference to JSON.NET and performance was consistently around 85-90% faster with the referenced code. That being said though - I serialized 10,000 objects in 80ms vs. 45ms so this isn't hardly slouchy. For the configuration component speed is not that important because both read and write operations typically happen once on first access and then every once in a while. But for other operations - say a serializer trying to handle AJAX requests on a Web Server one would be well served to create a hard dependency.Dynamic Loading - Worth it?On occasion dynamic loading makes sense. But there's a price to be paid in added code complexity and a performance hit. But for some operations that are not pivotal to a component or application and only used under certain circumstances dynamic loading can be beneficial to avoid having to ship extra files and loading down distributions. These days when you create new projects in Visual Studio with 30 assemblies before you even add your own code, trying to keep file counts under control seems a good idea. It's not the kind of thing you do on a regular basis, but when needed it can be a useful tool. Hopefully some of you find this information useful…© Rick Strahl, West Wind Technologies, 2005-2013Posted in .NET  C#   Tweet !function(d,s,id){var js,fjs=d.getElementsByTagName(s)[0];if(!d.getElementById(id)){js=d.createElement(s);js.id=id;js.src="//platform.twitter.com/widgets.js";fjs.parentNode.insertBefore(js,fjs);}}(document,"script","twitter-wjs"); (function() { var po = document.createElement('script'); po.type = 'text/javascript'; po.async = true; po.src = 'https://apis.google.com/js/plusone.js'; var s = document.getElementsByTagName('script')[0]; s.parentNode.insertBefore(po, s); })();

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• Mouse Clicks, Reactive Extensions and StreamInsight Mashup

  I had an hour spare this afternoon so I wanted to have another play with Reactive Extensions in .Net and StreamInsight.  I also didn’t want to simply use a console window as a way of gathering events so I decided to use a windows form instead. The task I set myself was this. Whenever I click on my form I want to subscribe to the event and output its location to the console window and also the timestamp of the event.  In addition to this I want to know for every mouse click I do, how many mouse clicks have happened in the last 5 seconds. The second point here is really interesting.  I have often found this when working with people on problems.  It is how you ask the question that determines how you tackle the problem.  I will show 2 ways of possibly answering the second question depending on how the question was interpreted. As a side effect of this example I will show how time in StreamInsight can stand still.  This is an important concept and we can see it in the output later. Now to the code.  I will break it all down in this blogpost but you can download the solution and see it all together. I created a Console application and then instantiate a windows form.   frm = new Form(); Thread g = new Thread(CallUI); g.SetApartmentState(ApartmentState.STA); g.Start();   Call UI looks like this   static void CallUI() { System.Windows.Forms.Application.Run(frm); frm.Activate(); frm.BringToFront(); }   Now what we need to do is create an observable from the MouseClick event on the form.  For this we use the Reactive Extensions.   var lblevt = Observable.FromEvent<MouseEventArgs>(frm, "MouseClick").Timestamp();   As mentioned earlier I have two objectives in this example and to solve the first I am going to again use the Reactive extensions.  Let’s subscribe to the MouseClick event and output the location and timestamp to the console. lblevt.Subscribe(evt => { Console.WriteLine("Clicked: {0}, {1} ", evt.Value.EventArgs.Location,evt.Timestamp); }); That should take care of obective #1 but what about the second objective.  For that we need some temporal windowing and this means StreamInsight.  First we need to turn our Observable collection of MouseClick events into a PointStream Server s = Server.Create("Default"); Microsoft.ComplexEventProcessing.Application a = s.CreateApplication("MouseClicks"); var input = lblevt.ToPointStream( a, evt => PointEvent.CreateInsert( evt.Timestamp, new { loc = evt.Value.EventArgs.Location.ToString(), ts = evt.Timestamp.ToLocalTime().ToString() }), AdvanceTimeSettings.IncreasingStartTime);   Now that we have created out PointStream we need to do something with it and this is where we get to our second objective.  It is pretty clear that we want some kind of windowing but what? Here is one way of doing it.  It might not be what you wanted but again it is how the second objective is interpreted   var q = from i in input.TumblingWindow(TimeSpan.FromSeconds(5), HoppingWindowOutputPolicy.ClipToWindowEnd) select new { CountOfClicks = i.Count() };   The above code creates tumbling windows of 5 seconds and counts the number of events in the windows.  If there are no events in the window then no result is output.  Likewise until an event (MouseClick) is issued then we do not see anything in the output (that is not strictly true because it is the CTI strapped to our MouseClick events that flush the events through the StreamInsight engine not the events themselves).  This approach is centred around the windows and not the events.  Until the windows complete and a CTI is issued then no events are pushed through. An alternate way of answering our second question is below   var q = from i in input.AlterEventDuration(evt => TimeSpan.FromSeconds(5)).SnapshotWindow(SnapshotWindowOutputPolicy.Clip) select new { CountOfClicks = i.Count() };   In this code we extend the duration of each MouseClick to five seconds.  We then create  Snapshot Windows over those events.  Snapshot windows are discussed in detail here.  With this solution we are centred around the events.  It is the events that are driving the output.  Let’s have a look at the output from this solution as it may be a little confusing. First though let me show how we get the output from StreamInsight into the Console window. foreach (var x in q.ToPointEnumerable().Where(e => e.EventKind != EventKind.Cti)) { Console.WriteLine(x.Payload.CountOfClicks); }   Ok so now to the output.   The table at the top shows the output from our routine and the table at the bottom helps to explain the output.  One of the things that will help as well is, you will note that for our PointStream we set the issuing of CTIs to be IncreasingStartTime.  What this means is that the CTI is placed right at the start of the event so will not flush the event with which it was issued but will flush those prior to it.  In the bottom table the Blue fill is where we issued a click.  Yellow fill is the duration and boundaries of our events.  The numbers at the bottom indicate the count of events   Clicked 22:40:16                                 Clicked 23:40:18                                 1                                   Clicked 23:40:20                                 2                                   Clicked 23:40:22                                 3                                   2                                   Clicked 23:40:24                                 3                                   2                                   Clicked 23:40:32                                 3                                   2                                   1                                                                                                         secs 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32                                                                                                                                                                                                                         counts   1   2 3 2 3 2 3   2   1           What we can see here in the output is that the counts include all the end edges that have occurred between the mouse clicks.  If we look specifically at the mouse click at 22:40:32. then we see that 3 events are returned to us. These include the following End Edge count at 22:40:25 End Edge count at 22:40:27 End Edge count at 22:40:29 Another thing we notice is that until we actually issue a CTI at 22:40:32 then those last 3 snapshot window counts will never be reported. Hopefully this has helped to explain  a few concepts around StreamInsight and the IObservable() pattern.   You can download this solution from here and play.  You will need the Reactive Framework from here and StreamInsight 1.1

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• Tracking download of non-html (like pdf) downloads with jQuery and Google Analytics

  - by developerit

  Hi folks, it’s been quite calm at Developer IT’s this summer since we were all involved in other projects, but we are slowly comming back. In this post, we will present a simple way of tracking files download with Google Analytics with the help of jQuery. We work for a client that offers a lot of pdf files to download on their web site and wanted to know which one are the most popular. They use Google Analytics for a long time now and we did not want to have a second interface in order to present those stats to our client. So usign IIS logs was not a idea to consider. Since Google already offers us a splendid web interface and a powerful API, we deceided to hook up simple javascript code into the jQuery click event to notify Analytics that a pdf has been requested. (function ($) { function trackLink(e) { var url = $(this).attr('href'); //alert(url); // for debug purpose // old page tracker code pageTracker._trackPageview(url); // you can use the new one too _gaq.push(["_trackPageview",url]); //always return true, in order for the browser to continue its job return true; } // When DOM ready $(function () { // hook up the click event $('.pdf-links a').click(trackLink); }); })(jQuery); You can be more presice or even be sure not to miss one click by changing the selector which hooks up the click event. I have been usign this code to track AJAX requests and it works flawlessly.

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• xf86OpenConsole: Cannot find a free VT: Invalid argument

  - by Oliver Seeliger

  I'v set up an Ubuntu 12.04 from the precreated OpenVZ template. The host system is configured as follows: # $ cat /etc/issue Debian GNU/Linux 6.0 # $ uname -a Linux openvz-02 2.6.32-16-pve #1 SMP Fri Nov 9 11:42:51 CET 2012 x86_64 GNU/Linux # $ apt-cache showpkg proxmox-ve-2.6.32 Package: proxmox-ve-2.6.32 # $ tail -n 3 /etc/apt/sources.list # PVE packages provided by proxmox.com deb http://download.proxmox.com/debian squeeze pve For a software project I need a minimal xserver and followed the instructions at https://help.ubuntu.com/community/ServerGUI. I simply installed the package xorg (xorg 1:7.6+7ubuntu7.1). Now when I 'startx' I get an error message Fatal server error: xf86OpenConsole: Cannot find a free VT: Invalid argument The complete output of startx # startx X.Org X Server 1.11.3 Release Date: 2011-12-16 X Protocol Version 11, Revision 0 Build Operating System: Linux 2.6.42-23-generic x86_64 Ubuntu Current Operating System: Linux www 2.6.32-16-pve #1 SMP Fri Nov 9 11:42:51 CET 2012 x86_64 Kernel command line: quiet Build Date: 29 August 2012 12:12:33AM xorg-server 2:1.11.4-0ubuntu10.8 (For technical support please see http://www.ubuntu.com/support) Current version of pixman: 0.24.4 Before reporting problems, check http://wiki.x.org to make sure that you have the latest version. Markers: (--) probed, (**) from config file, (==) default setting, (++) from command line, (!!) notice, (II) informational, (WW) warning, (EE) error, (NI) not implemented, (??) unknown. (==) Log file: "/var/log/Xorg.0.log", Time: Tue Nov 20 08:46:04 2012 (==) Using system config directory "/usr/share/X11/xorg.conf.d" Fatal server error: xf86OpenConsole: Cannot find a free VT: Invalid argument Please consult the The X.Org Foundation support at http://wiki.x.org for help. Please also check the log file at "/var/log/Xorg.0.log" for additional information. ddxSigGiveUp: Closing log Server terminated with error (1). Closing log file.

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• WiX 3 Tutorial: Custom EULA License and MSI localization

  - by Mladen Prajdic

  In this part of the ongoing Wix tutorial series we’ll take a look at how to localize your MSI into different languages. We’re still the mighty SuperForm: Program that takes care of all your label color needs. :) Localizing the MSI With WiX 3.0 localizing an MSI is pretty much a simple and straightforward process. First let look at the WiX project Properties->Build. There you can see "Cultures to build" textbox. Put specific cultures to build into the testbox or leave it empty to build all of them. Cultures have to be in correct culture format like en-US, en-GB or de-DE. Next we have to tell WiX which cultures we actually have in our project. Take a look at the first post in the series about Solution/Project structure and look at the Lang directory in the project structure picture. There we have de-de and en-us subfolders each with its own localized stuff. In the subfolders pay attention to the WXL files Loc_de-de.wxl and Loc_en-us.wxl. Each one has a <String Id="LANG"> under the WixLocalization root node. By including the string with id LANG we tell WiX we want that culture built. For English we have <String Id="LANG">1033</String>, for German <String Id="LANG">1031</String> in Loc_de-de.wxl and for French we’d have to create another file Loc_fr-FR.wxl and put <String Id="LANG">1036</String>. WXL files are localization files. Any string we want to localize we have to put in there. To reference it we use loc keyword like this: !(loc.IdOfTheVariable) => !(loc.MustCloseSuperForm) This is our Loc_en-us.wxl. Note that German wxl has an identical structure but values are in German. <?xml version="1.0" encoding="utf-8"?><WixLocalization Culture="en-us" xmlns="http://schemas.microsoft.com/wix/2006/localization" Codepage="1252"> <String Id="LANG">1033</String> <String Id="ProductName">SuperForm</String> <String Id="LicenseRtf" Overridable="yes">\Lang\en-us\EULA_en-us.rtf</String> <String Id="ManufacturerName">My Company Name</String> <String Id="AppNotSupported">This application is is not supported on your current OS. Minimal OS supported is Windows XP SP2</String> <String Id="DotNetFrameworkNeeded">.NET Framework 3.5 is required. Please install the .NET Framework then run this installer again.</String> <String Id="MustCloseSuperForm">Must close SuperForm!</String> <String Id="SuperFormNewerVersionInstalled">A newer version of !(loc.ProductName) is already installed.</String> <String Id="ProductKeyCheckDialog_Title">!(loc.ProductName) setup</String> <String Id="ProductKeyCheckDialogControls_Title">!(loc.ProductName) Product check</String> <String Id="ProductKeyCheckDialogControls_Description">Plese Enter following information to perform the licence check.</String> <String Id="ProductKeyCheckDialogControls_FullName">Full Name:</String> <String Id="ProductKeyCheckDialogControls_Organization">Organization:</String> <String Id="ProductKeyCheckDialogControls_ProductKey">Product Key:</String> <String Id="ProductKeyCheckDialogControls_InvalidProductKey">The product key you entered is invalid. Please call user support.</String> </WixLocalization>   As you can see from the file we can use localization variables in other variables like we do for SuperFormNewerVersionInstalled string. ProductKeyCheckDialog* strings are to localize a custom dialog for Product key check which we’ll look at in the next post. Built in dialog text localization Under the de-de folder there’s also the WixUI_de-de.wxl file. This files contains German translations of all texts that are in WiX built in dialogs. It can be downloaded from WiX 3.0.5419.0 Source Forge site. Download the wix3-sources.zip and go to \src\ext\UIExtension\wixlib. There you’ll find already translated all WiX texts in 12 Languages. Localizing the custom EULA license Here it gets ugly. We can override the default EULA license easily by overriding WixUILicenseRtf WiX variable like this: <WixVariable Id="WixUILicenseRtf" Value="License.rtf" /> where License.rtf is the name of your custom EULA license file. The downside of this method is that you can only have one license file which means no localization for it. That’s why we need to make a workaround. License is checked on a dialog name LicenseAgreementDialog. What we have to do is overwrite that dialog and insert the functionality for localization. This is a code for LicenseAgreementDialogOverwritten.wxs, an overwritten LicenseAgreementDialog that supports localization. LicenseAcceptedOverwritten replaces the LicenseAccepted built in variable. <?xml version="1.0" encoding="UTF-8" ?><Wix xmlns="http://schemas.microsoft.com/wix/2006/wi"> <Fragment> <UI> <Dialog Id="LicenseAgreementDialogOverwritten" Width="370" Height="270" Title="!(loc.LicenseAgreementDlg_Title)"> <Control Id="LicenseAcceptedOverwrittenCheckBox" Type="CheckBox" X="20" Y="207" Width="330" Height="18" CheckBoxValue="1" Property="LicenseAcceptedOverwritten" Text="!(loc.LicenseAgreementDlgLicenseAcceptedCheckBox)" /> <Control Id="Back" Type="PushButton" X="180" Y="243" Width="56" Height="17" Text="!(loc.WixUIBack)" /> <Control Id="Next" Type="PushButton" X="236" Y="243" Width="56" Height="17" Default="yes" Text="!(loc.WixUINext)"> <Publish Event="SpawnWaitDialog" Value="WaitForCostingDlg">CostingComplete = 1</Publish> <Condition Action="disable"> <![CDATA[ LicenseAcceptedOverwritten <> "1" ]]> </Condition> <Condition Action="enable">LicenseAcceptedOverwritten = "1"</Condition> </Control> <Control Id="Cancel" Type="PushButton" X="304" Y="243" Width="56" Height="17" Cancel="yes" Text="!(loc.WixUICancel)"> <Publish Event="SpawnDialog" Value="CancelDlg">1</Publish> </Control> <Control Id="BannerBitmap" Type="Bitmap" X="0" Y="0" Width="370" Height="44" TabSkip="no" Text="!(loc.LicenseAgreementDlgBannerBitmap)" /> <Control Id="LicenseText" Type="ScrollableText" X="20" Y="60" Width="330" Height="140" Sunken="yes" TabSkip="no"> <!-- This is original line --> <!--<Text SourceFile="!(wix.WixUILicenseRtf=$(var.LicenseRtf))" />--> <!-- To enable EULA localization we change it to this --> <Text SourceFile="$(var.ProjectDir)\!(loc.LicenseRtf)" /> <!-- In each of localization files (wxl) put line like this: <String Id="LicenseRtf" Overridable="yes">\Lang\en-us\EULA_en-us.rtf</String>--> </Control> <Control Id="Print" Type="PushButton" X="112" Y="243" Width="56" Height="17" Text="!(loc.WixUIPrint)"> <Publish Event="DoAction" Value="WixUIPrintEula">1</Publish> </Control> <Control Id="BannerLine" Type="Line" X="0" Y="44" Width="370" Height="0" /> <Control Id="BottomLine" Type="Line" X="0" Y="234" Width="370" Height="0" /> <Control Id="Description" Type="Text" X="25" Y="23" Width="340" Height="15" Transparent="yes" NoPrefix="yes" Text="!(loc.LicenseAgreementDlgDescription)" /> <Control Id="Title" Type="Text" X="15" Y="6" Width="200" Height="15" Transparent="yes" NoPrefix="yes" Text="!(loc.LicenseAgreementDlgTitle)" /> </Dialog> </UI> </Fragment></Wix>   Look at the Control with Id "LicenseText” and read the comments. We’ve changed the original license text source to "$(var.ProjectDir)\!(loc.LicenseRtf)". var.ProjectDir is the directory of the project file. The !(loc.LicenseRtf) is where the magic happens. Scroll up and take a look at the wxl localization file example. We have the LicenseRtf declared there and it’s been made overridable so developers can change it if they want. The value of the LicenseRtf is the path to our localized EULA relative to the WiX project directory. With little hacking we’ve achieved a fully localizable installer package.   The final step is to insert the extended LicenseAgreementDialogOverwritten license dialog into the installer GUI chain. This is how it’s done under the <UI> node of course.   <UI> <!-- code to be discussed in later posts –> <!-- BEGIN UI LOGIC FOR CLEAN INSTALLER --> <Publish Dialog="WelcomeDlg" Control="Next" Event="NewDialog" Value="LicenseAgreementDialogOverwritten">1</Publish> <Publish Dialog="LicenseAgreementDialogOverwritten" Control="Back" Event="NewDialog" Value="WelcomeDlg">1</Publish> <Publish Dialog="LicenseAgreementDialogOverwritten" Control="Next" Event="NewDialog" Value="ProductKeyCheckDialog">LicenseAcceptedOverwritten = "1" AND NOT OLDER_VERSION_FOUND</Publish> <Publish Dialog="InstallDirDlg" Control="Back" Event="NewDialog" Value="ProductKeyCheckDialog">1</Publish> <!-- END UI LOGIC FOR CLEAN INSTALLER –> <!-- code to be discussed in later posts --></UI> For a thing that should be simple for the end developer to do, localization can be a bit advanced for the novice WiXer. Hope this post makes the journey easier and that next versions of WiX improve this process. WiX 3 tutorial by Mladen Prajdic navigation WiX 3 Tutorial: Solution/Project structure and Dev resources WiX 3 Tutorial: Understanding main wxs and wxi file WiX 3 Tutorial: Generating file/directory fragments with Heat.exe  WiX 3 Tutorial: Custom EULA License and MSI localization WiX 3 Tutorial: Product Key Check custom action WiX 3 Tutorial: Building an updater WiX 3 Tutorial: Icons and installer pictures WiX 3 Tutorial: Creating a Bootstrapper

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• can't install psycopg2 in my env on mac os x lion

  - by Alexander Ovchinnikov

  I tried install psycopg2 via pip in my virtual env, but got this error: ld: library not found for -lpq (full log here: http://pastebin.com/XdmGyJ4u ) I tried install postgres 9.1 from .dmg and via port, (gksks)iMac-Alexander:~ lorddaedra$ locate libpq /Developer/SDKs/MacOSX10.7.sdk/usr/include/libpq /Developer/SDKs/MacOSX10.7.sdk/usr/include/libpq/libpq-fs.h /Developer/SDKs/MacOSX10.7.sdk/usr/include/libpq-events.h /Developer/SDKs/MacOSX10.7.sdk/usr/include/libpq-fe.h /Developer/SDKs/MacOSX10.7.sdk/usr/include/postgresql/internal/libpq /Developer/SDKs/MacOSX10.7.sdk/usr/include/postgresql/internal/libpq/pqcomm.h /Developer/SDKs/MacOSX10.7.sdk/usr/include/postgresql/internal/libpq-int.h /Developer/SDKs/MacOSX10.7.sdk/usr/include/postgresql/server/libpq /Developer/SDKs/MacOSX10.7.sdk/usr/include/postgresql/server/libpq/auth.h /Developer/SDKs/MacOSX10.7.sdk/usr/include/postgresql/server/libpq/be-fsstubs.h /Developer/SDKs/MacOSX10.7.sdk/usr/include/postgresql/server/libpq/crypt.h /Developer/SDKs/MacOSX10.7.sdk/usr/include/postgresql/server/libpq/hba.h /Developer/SDKs/MacOSX10.7.sdk/usr/include/postgresql/server/libpq/ip.h /Developer/SDKs/MacOSX10.7.sdk/usr/include/postgresql/server/libpq/libpq-be.h /Developer/SDKs/MacOSX10.7.sdk/usr/include/postgresql/server/libpq/libpq-fs.h /Developer/SDKs/MacOSX10.7.sdk/usr/include/postgresql/server/libpq/libpq.h /Developer/SDKs/MacOSX10.7.sdk/usr/include/postgresql/server/libpq/md5.h /Developer/SDKs/MacOSX10.7.sdk/usr/include/postgresql/server/libpq/pqcomm.h /Developer/SDKs/MacOSX10.7.sdk/usr/include/postgresql/server/libpq/pqformat.h /Developer/SDKs/MacOSX10.7.sdk/usr/include/postgresql/server/libpq/pqsignal.h /Developer/SDKs/MacOSX10.7.sdk/usr/lib/libpq.5.3.dylib /Developer/SDKs/MacOSX10.7.sdk/usr/lib/libpq.5.dylib /Developer/SDKs/MacOSX10.7.sdk/usr/lib/libpq.a /Developer/SDKs/MacOSX10.7.sdk/usr/lib/libpq.dylib /Library/PostgreSQL/9.1/doc/postgresql/html/install-windows-libpq.html /Library/PostgreSQL/9.1/doc/postgresql/html/libpq-async.html /Library/PostgreSQL/9.1/doc/postgresql/html/libpq-build.html /Library/PostgreSQL/9.1/doc/postgresql/html/libpq-cancel.html /Library/PostgreSQL/9.1/doc/postgresql/html/libpq-connect.html /Library/PostgreSQL/9.1/doc/postgresql/html/libpq-control.html /Library/PostgreSQL/9.1/doc/postgresql/html/libpq-copy.html /Library/PostgreSQL/9.1/doc/postgresql/html/libpq-envars.html /Library/PostgreSQL/9.1/doc/postgresql/html/libpq-events.html /Library/PostgreSQL/9.1/doc/postgresql/html/libpq-example.html /Library/PostgreSQL/9.1/doc/postgresql/html/libpq-exec.html /Library/PostgreSQL/9.1/doc/postgresql/html/libpq-fastpath.html /Library/PostgreSQL/9.1/doc/postgresql/html/libpq-ldap.html /Library/PostgreSQL/9.1/doc/postgresql/html/libpq-misc.html /Library/PostgreSQL/9.1/doc/postgresql/html/libpq-notice-processing.html /Library/PostgreSQL/9.1/doc/postgresql/html/libpq-notify.html /Library/PostgreSQL/9.1/doc/postgresql/html/libpq-pgpass.html /Library/PostgreSQL/9.1/doc/postgresql/html/libpq-pgservice.html /Library/PostgreSQL/9.1/doc/postgresql/html/libpq-ssl.html /Library/PostgreSQL/9.1/doc/postgresql/html/libpq-status.html /Library/PostgreSQL/9.1/doc/postgresql/html/libpq-threading.html /Library/PostgreSQL/9.1/doc/postgresql/html/libpq.html /Library/PostgreSQL/9.1/include/libpq /Library/PostgreSQL/9.1/include/libpq/libpq-fs.h /Library/PostgreSQL/9.1/include/libpq-events.h /Library/PostgreSQL/9.1/include/libpq-fe.h /Library/PostgreSQL/9.1/include/postgresql/internal/libpq /Library/PostgreSQL/9.1/include/postgresql/internal/libpq/pqcomm.h /Library/PostgreSQL/9.1/include/postgresql/internal/libpq-int.h /Library/PostgreSQL/9.1/include/postgresql/server/libpq /Library/PostgreSQL/9.1/include/postgresql/server/libpq/auth.h /Library/PostgreSQL/9.1/include/postgresql/server/libpq/be-fsstubs.h /Library/PostgreSQL/9.1/include/postgresql/server/libpq/crypt.h /Library/PostgreSQL/9.1/include/postgresql/server/libpq/hba.h /Library/PostgreSQL/9.1/include/postgresql/server/libpq/ip.h /Library/PostgreSQL/9.1/include/postgresql/server/libpq/libpq-be.h /Library/PostgreSQL/9.1/include/postgresql/server/libpq/libpq-fs.h /Library/PostgreSQL/9.1/include/postgresql/server/libpq/libpq.h /Library/PostgreSQL/9.1/include/postgresql/server/libpq/md5.h /Library/PostgreSQL/9.1/include/postgresql/server/libpq/pqcomm.h /Library/PostgreSQL/9.1/include/postgresql/server/libpq/pqformat.h /Library/PostgreSQL/9.1/include/postgresql/server/libpq/pqsignal.h /Library/PostgreSQL/9.1/lib/libpq.5.4.dylib /Library/PostgreSQL/9.1/lib/libpq.5.dylib /Library/PostgreSQL/9.1/lib/libpq.a /Library/PostgreSQL/9.1/lib/libpq.dylib /Library/PostgreSQL/9.1/lib/postgresql/libpqwalreceiver.so /Library/PostgreSQL/9.1/pgAdmin3.app/Contents/Frameworks/libpq.5.dylib /Library/PostgreSQL/psqlODBC/lib/libpq.5.4.dylib /Library/PostgreSQL/psqlODBC/lib/libpq.5.dylib /Library/PostgreSQL/psqlODBC/lib/libpq.dylib /Library/WebServer/Documents/postgresql/html/install-windows-libpq.html /Library/WebServer/Documents/postgresql/html/libpq-async.html /Library/WebServer/Documents/postgresql/html/libpq-build.html /Library/WebServer/Documents/postgresql/html/libpq-cancel.html /Library/WebServer/Documents/postgresql/html/libpq-connect.html /Library/WebServer/Documents/postgresql/html/libpq-control.html /Library/WebServer/Documents/postgresql/html/libpq-copy.html /Library/WebServer/Documents/postgresql/html/libpq-envars.html /Library/WebServer/Documents/postgresql/html/libpq-events.html /Library/WebServer/Documents/postgresql/html/libpq-example.html /Library/WebServer/Documents/postgresql/html/libpq-exec.html /Library/WebServer/Documents/postgresql/html/libpq-fastpath.html /Library/WebServer/Documents/postgresql/html/libpq-ldap.html /Library/WebServer/Documents/postgresql/html/libpq-misc.html /Library/WebServer/Documents/postgresql/html/libpq-notice-processing.html /Library/WebServer/Documents/postgresql/html/libpq-notify.html /Library/WebServer/Documents/postgresql/html/libpq-pgpass.html /Library/WebServer/Documents/postgresql/html/libpq-pgservice.html /Library/WebServer/Documents/postgresql/html/libpq-ssl.html /Library/WebServer/Documents/postgresql/html/libpq-status.html /Library/WebServer/Documents/postgresql/html/libpq-threading.html /Library/WebServer/Documents/postgresql/html/libpq.html /opt/local/include/postgresql90/internal/libpq /opt/local/include/postgresql90/internal/libpq/pqcomm.h /opt/local/include/postgresql90/internal/libpq-int.h /opt/local/include/postgresql90/libpq /opt/local/include/postgresql90/libpq/libpq-fs.h /opt/local/include/postgresql90/libpq-events.h /opt/local/include/postgresql90/libpq-fe.h /opt/local/include/postgresql90/server/libpq /opt/local/include/postgresql90/server/libpq/auth.h /opt/local/include/postgresql90/server/libpq/be-fsstubs.h /opt/local/include/postgresql90/server/libpq/crypt.h /opt/local/include/postgresql90/server/libpq/hba.h /opt/local/include/postgresql90/server/libpq/ip.h /opt/local/include/postgresql90/server/libpq/libpq-be.h /opt/local/include/postgresql90/server/libpq/libpq-fs.h /opt/local/include/postgresql90/server/libpq/libpq.h /opt/local/include/postgresql90/server/libpq/md5.h /opt/local/include/postgresql90/server/libpq/pqcomm.h /opt/local/include/postgresql90/server/libpq/pqformat.h /opt/local/include/postgresql90/server/libpq/pqsignal.h /opt/local/lib/postgresql90/libpq.5.3.dylib /opt/local/lib/postgresql90/libpq.5.dylib /opt/local/lib/postgresql90/libpq.a /opt/local/lib/postgresql90/libpq.dylib /opt/local/lib/postgresql90/libpqwalreceiver.so /opt/local/var/macports/sources/rsync.macports.org/release/tarballs/ports/databases/libpqxx /opt/local/var/macports/sources/rsync.macports.org/release/tarballs/ports/databases/libpqxx/Portfile /opt/local/var/macports/sources/rsync.macports.org/release/tarballs/ports/databases/libpqxx26 /opt/local/var/macports/sources/rsync.macports.org/release/tarballs/ports/databases/libpqxx26/Portfile /usr/include/libpq /usr/include/libpq/libpq-fs.h /usr/include/libpq-events.h /usr/include/libpq-fe.h /usr/include/postgresql/internal/libpq /usr/include/postgresql/internal/libpq/pqcomm.h /usr/include/postgresql/internal/libpq-int.h /usr/include/postgresql/server/libpq /usr/include/postgresql/server/libpq/auth.h /usr/include/postgresql/server/libpq/be-fsstubs.h /usr/include/postgresql/server/libpq/crypt.h /usr/include/postgresql/server/libpq/hba.h /usr/include/postgresql/server/libpq/ip.h /usr/include/postgresql/server/libpq/libpq-be.h /usr/include/postgresql/server/libpq/libpq-fs.h /usr/include/postgresql/server/libpq/libpq.h /usr/include/postgresql/server/libpq/md5.h /usr/include/postgresql/server/libpq/pqcomm.h /usr/include/postgresql/server/libpq/pqformat.h /usr/include/postgresql/server/libpq/pqsignal.h /usr/lib/libpq.5.3.dylib /usr/lib/libpq.5.dylib /usr/lib/libpq.a /usr/lib/libpq.dylib How to tell pip to use this lib in /Library/PostgreSQL/9.1/lib/ (or may be in /usr/lib)? or may be install this lib again in my env (i try keep my env isolated from mac as possible)

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• heartbeat: Bad nodename in /etc/ha.d//haresources [node1]

  - by Richard

  I'm trying to start heartbeat on Ubuntu 10.04 with service heartbeat start, but getting the following errors: heartbeat[24829]: 2011/11/22_19:31:07 ERROR: Bad nodename in /etc/ha.d//haresources [node1] heartbeat[24829]: 2011/11/22_19:31:07 ERROR: Configuration error, heartbeat not started. On on server uname -n produces loadb1, on the second server uname -n produces loadb2. The two servers can ping each other okay with those names. This is /etc/ha.d/ha.cnf on both servers: debugfile /var/log/ha-debug logfile /var/log/ha-log logfacility local0 keepalive 2 deadtime 10 udpport 694 bcast eth1 ucast eth0 my.external.ip ucast eth0 my.external.ip ucast eth1 10.0.0.5 ucast eth1 10.0.0.6 #udp eth0 node loadb1 node loadb2 auto_failback off And this is /etc/ha.d/haresources on both servers: node1 IPaddr::46.20.121.113 httpd smb dhcpd Authkeys is also set up. What am I doing wrong? The part where I'm least clear is the ucast/bcast lines.

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• Apache 2 Virtual Hosts no working on OSX 10.6

  - by matt_lethargic

  This is my first MacBook and I'm trying to get virtual hosts up and running so as it's going to be my dev machine. I've got apache/php/mysql running fine, the problem is that what ever address I go to I just get one of the virtual hosts I've setup. I can't even get to the root site anymore. I had phpmyadmin setup on http://localhost/pma but now that comes up with an error. If I take out the vhosts config file it seems to work again. I've put all my configs I can think you'll need below. ############## httpd config ############# ServerRoot "/usr" Listen 80 LoadModule authn_file_module libexec/apache2/mod_authn_file.so LoadModule authn_dbm_module libexec/apache2/mod_authn_dbm.so LoadModule authn_anon_module libexec/apache2/mod_authn_anon.so LoadModule authn_dbd_module libexec/apache2/mod_authn_dbd.so LoadModule authn_default_module libexec/apache2/mod_authn_default.so LoadModule authz_host_module libexec/apache2/mod_authz_host.so LoadModule authz_groupfile_module libexec/apache2/mod_authz_groupfile.so LoadModule authz_user_module libexec/apache2/mod_authz_user.so LoadModule authz_dbm_module libexec/apache2/mod_authz_dbm.so LoadModule authz_owner_module libexec/apache2/mod_authz_owner.so LoadModule authz_default_module libexec/apache2/mod_authz_default.so LoadModule auth_basic_module libexec/apache2/mod_auth_basic.so LoadModule auth_digest_module libexec/apache2/mod_auth_digest.so LoadModule cache_module libexec/apache2/mod_cache.so LoadModule disk_cache_module libexec/apache2/mod_disk_cache.so LoadModule mem_cache_module libexec/apache2/mod_mem_cache.so LoadModule dbd_module libexec/apache2/mod_dbd.so LoadModule dumpio_module libexec/apache2/mod_dumpio.so LoadModule reqtimeout_module libexec/apache2/mod_reqtimeout.so LoadModule ext_filter_module libexec/apache2/mod_ext_filter.so LoadModule include_module libexec/apache2/mod_include.so LoadModule filter_module libexec/apache2/mod_filter.so LoadModule substitute_module libexec/apache2/mod_substitute.so LoadModule deflate_module libexec/apache2/mod_deflate.so LoadModule log_config_module libexec/apache2/mod_log_config.so LoadModule log_forensic_module libexec/apache2/mod_log_forensic.so LoadModule logio_module libexec/apache2/mod_logio.so LoadModule env_module libexec/apache2/mod_env.so LoadModule mime_magic_module libexec/apache2/mod_mime_magic.so LoadModule cern_meta_module libexec/apache2/mod_cern_meta.so LoadModule expires_module libexec/apache2/mod_expires.so LoadModule headers_module libexec/apache2/mod_headers.so LoadModule ident_module libexec/apache2/mod_ident.so LoadModule usertrack_module libexec/apache2/mod_usertrack.so LoadModule setenvif_module libexec/apache2/mod_setenvif.so LoadModule version_module libexec/apache2/mod_version.so LoadModule proxy_module libexec/apache2/mod_proxy.so LoadModule proxy_connect_module libexec/apache2/mod_proxy_connect.so LoadModule proxy_ftp_module libexec/apache2/mod_proxy_ftp.so LoadModule proxy_http_module libexec/apache2/mod_proxy_http.so LoadModule proxy_scgi_module libexec/apache2/mod_proxy_scgi.so LoadModule proxy_ajp_module libexec/apache2/mod_proxy_ajp.so LoadModule proxy_balancer_module libexec/apache2/mod_proxy_balancer.so LoadModule ssl_module libexec/apache2/mod_ssl.so LoadModule mime_module libexec/apache2/mod_mime.so LoadModule dav_module libexec/apache2/mod_dav.so LoadModule status_module libexec/apache2/mod_status.so LoadModule autoindex_module libexec/apache2/mod_autoindex.so LoadModule asis_module libexec/apache2/mod_asis.so LoadModule info_module libexec/apache2/mod_info.so LoadModule cgi_module libexec/apache2/mod_cgi.so LoadModule dav_fs_module libexec/apache2/mod_dav_fs.so LoadModule vhost_alias_module libexec/apache2/mod_vhost_alias.so LoadModule negotiation_module libexec/apache2/mod_negotiation.so LoadModule dir_module libexec/apache2/mod_dir.so LoadModule imagemap_module libexec/apache2/mod_imagemap.so LoadModule actions_module libexec/apache2/mod_actions.so LoadModule speling_module libexec/apache2/mod_speling.so LoadModule userdir_module libexec/apache2/mod_userdir.so LoadModule alias_module libexec/apache2/mod_alias.so LoadModule rewrite_module libexec/apache2/mod_rewrite.so LoadModule bonjour_module libexec/apache2/mod_bonjour.so LoadModule php5_module libexec/apache2/libphp5.so <IfModule !mpm_netware_module> <IfModule !mpm_winnt_module> User _www Group _www </IfModule> </IfModule> ServerAdmin [email protected] ServerName localhost:80 DocumentRoot "/Library/WebServer/Documents" <Directory /> Options FollowSymLinks AllowOverride All Order allow,deny Allow from all </Directory> <Directory "/Library/WebServer/Documents"> Options Indexes FollowSymLinks MultiViews AllowOverride All Order allow,deny Allow from all </Directory> <IfModule dir_module> DirectoryIndex index.html </IfModule> <FilesMatch "^\.([Hh][Tt]|[Dd][Ss]_[Ss])"> Order allow,deny Deny from all Satisfy All </FilesMatch> <Files "rsrc"> Order allow,deny Deny from all Satisfy All </Files> <DirectoryMatch ".*\.\.namedfork"> Order allow,deny Deny from all Satisfy All </DirectoryMatch> ErrorLog "/private/var/log/apache2/error_log" LogLevel warn <IfModule log_config_module> LogFormat "%h %l %u %t \"%r\" %>s %b \"%{Referer}i\" \"%{User-Agent}i\"" combined LogFormat "%h %l %u %t \"%r\" %>s %b" common <IfModule logio_module> LogFormat "%h %l %u %t \"%r\" %>s %b \"%{Referer}i\" \"%{User-Agent}i\" %I %O" combinedio </IfModule> CustomLog "/private/var/log/apache2/access_log" common </IfModule> <IfModule alias_module> ScriptAliasMatch ^/cgi-bin/((?!(?i:webobjects)).*$) "/Library/WebServer/CGI-Executables/$1" </IfModule> <Directory "/Library/WebServer/CGI-Executables"> AllowOverride None Options None Order allow,deny Allow from all </Directory> DefaultType text/plain <IfModule mime_module> TypesConfig /private/etc/apache2/mime.types AddType application/x-compress .Z AddType application/x-gzip .gz .tgz </IfModule> TraceEnable off Include /private/etc/apache2/extra/httpd-mpm.conf Include /private/etc/apache2/extra/httpd-autoindex.conf Include /private/etc/apache2/extra/httpd-languages.conf Include /private/etc/apache2/extra/httpd-userdir.conf Include /private/etc/apache2/extra/httpd-vhosts.conf Include /private/etc/apache2/extra/httpd-manual.conf <IfModule ssl_module> SSLRandomSeed startup builtin SSLRandomSeed connect builtin </IfModule> Include /private/etc/apache2/other/*.conf ############# httpd-vhosts ################ NameVirtualHost *:80 <VirtualHost *:80> ServerAdmin [email protected] DocumentRoot "/Users/matt/Workspace/farmers-arms/website/farmers_arms" ServerName dev.farmers ServerAlias www.dev.farmers ErrorLog "/private/var/log/apache2/localhost.farmers-error_log" CustomLog "/private/var/log/apache2/localhost.farmers-access_log" common <Directory "/Users/matt/Workspace/farmers-arms/website/farmers_arms"> Options FollowSymLinks AllowOverride All Order allow,deny Allow from all </Directory> </VirtualHost> Hosts file 127.0.0.1 localhost 255.255.255.255 broadcasthost ::1 localhost fe80::1%lo0 localhost 127.0.0.1 dev.farmers 127.0.0.1 dev.hft Help!!!

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• ASP.NET MVC Paging/Sorting/Filtering a list using ModelMetadata

  - by rajbk

  This post looks at how to control paging, sorting and filtering when displaying a list of data by specifying attributes in your Model using the ASP.NET MVC framework and the excellent MVCContrib library. It also shows how to hide/show columns and control the formatting of data using attributes.  This uses the Northwind database. A sample project is attached at the end of this post. Let’s start by looking at a class called ProductViewModel. The properties in the class are decorated with attributes. The OrderBy attribute tells the system that the Model can be sorted using that property. The SearchFilter attribute tells the system that filtering is allowed on that property. Filtering type is set by the  FilterType enum which currently supports Equals and Contains. The ScaffoldColumn property specifies if a column is hidden or not The DisplayFormat specifies how the data is formatted. public class ProductViewModel { [OrderBy(IsDefault = true)] [ScaffoldColumn(false)] public int? ProductID { get; set; }   [SearchFilter(FilterType.Contains)] [OrderBy] [DisplayName("Product Name")] public string ProductName { get; set; }   [OrderBy] [DisplayName("Unit Price")] [DisplayFormat(DataFormatString = "{0:c}")] public System.Nullable<decimal> UnitPrice { get; set; }   [DisplayName("Category Name")] public string CategoryName { get; set; }   [SearchFilter] [ScaffoldColumn(false)] public int? CategoryID { get; set; }   [SearchFilter] [ScaffoldColumn(false)] public int? SupplierID { get; set; }   [OrderBy] public bool Discontinued { get; set; } } Before we explore the code further, lets look at the UI.  The UI has a section for filtering the data. The column headers with links are sortable. Paging is also supported with the help of a pager row. The pager is rendered using the MVCContrib Pager component. The data is displayed using a customized version of the MVCContrib Grid component. The customization was done in order for the Grid to be aware of the attributes mentioned above. Now, let’s look at what happens when we perform actions on this page. The diagram below shows the process: The form on the page has its method set to “GET” therefore we see all the parameters in the query string. The query string is shown in blue above. This query gets routed to an action called Index with parameters of type ProductViewModel and PageSortOptions. The parameters in the query string get mapped to the input parameters using model binding. The ProductView object created has the information needed to filter data while the PageAndSorting object is used for paging and sorting the data. The last block in the figure above shows how the filtered and paged list is created. We receive a product list from our product repository (which is of type IQueryable) and first filter it by calliing the AsFiltered extension method passing in the productFilters object and then call the AsPagination extension method passing in the pageSort object. The AsFiltered extension method looks at the type of the filter instance passed in. It skips properties in the instance that do not have the SearchFilter attribute. For properties that have the SearchFilter attribute, it adds filter expression trees to filter against the IQueryable data. The AsPagination extension method looks at the type of the IQueryable and ensures that the column being sorted on has the OrderBy attribute. If it does not find one, it looks for the default sort field [OrderBy(IsDefault = true)]. It is required that at least one attribute in your model has the [OrderBy(IsDefault = true)]. This because a person could be performing paging without specifying an order by column. As you may recall the LINQ Skip method now requires that you call an OrderBy method before it. Therefore we need a default order by column to perform paging. The extension method adds a order expressoin tree to the IQueryable and calls the MVCContrib AsPagination extension method to page the data. Implementation Notes Auto Postback The search filter region auto performs a get request anytime the dropdown selection is changed. This is implemented using the following jQuery snippet $(document).ready(function () { $("#productSearch").change(function () { this.submit(); }); }); Strongly Typed View The code used in the Action method is shown below: public ActionResult Index(ProductViewModel productFilters, PageSortOptions pageSortOptions) { var productPagedList = productRepository.GetProductsProjected().AsFiltered(productFilters).AsPagination(pageSortOptions);   var productViewFilterContainer = new ProductViewFilterContainer(); productViewFilterContainer.Fill(productFilters.CategoryID, productFilters.SupplierID, productFilters.ProductName);   var gridSortOptions = new GridSortOptions { Column = pageSortOptions.Column, Direction = pageSortOptions.Direction };   var productListContainer = new ProductListContainerModel { ProductPagedList = productPagedList, ProductViewFilterContainer = productViewFilterContainer, GridSortOptions = gridSortOptions };   return View(productListContainer); } As you see above, the object that is returned to the view is of type ProductListContainerModel. This contains all the information need for the view to render the Search filter section (including dropdowns),  the Html.Pager (MVCContrib) and the Html.Grid (from MVCContrib). It also stores the state of the search filters so that they can recreate themselves when the page reloads (Viewstate, I miss you! :0)  The class diagram for the container class is shown below.   Custom MVCContrib Grid The MVCContrib grid default behavior was overridden so that it would auto generate the columns and format the columns based on the metadata and also make it aware of our custom attributes (see MetaDataGridModel in the sample code). The Grid ensures that the ShowForDisplay on the column is set to true This can also be set by the ScaffoldColumn attribute ref: http://bradwilson.typepad.com/blog/2009/10/aspnet-mvc-2-templates-part-2-modelmetadata.html) Column headers are set using the DisplayName attribute Column sorting is set using the OrderBy attribute. The data is formatted using the DisplayFormat attribute. Generic Extension methods for Sorting and Filtering The extension method AsFiltered takes in an IQueryable<T> and uses expression trees to query against the IQueryable data. The query is constructed using the Model metadata and the properties of the T filter (productFilters in our case). Properties in the Model that do not have the SearchFilter attribute are skipped when creating the filter expression tree.  It returns an IQueryable<T>. The extension method AsPagination takes in an IQuerable<T> and first ensures that the column being sorted on has the OrderBy attribute. If not, we look for the default OrderBy column ([OrderBy(IsDefault = true)]). We then build an expression tree to sort on this column. We finally hand off the call to the MVCContrib AsPagination which returns an IPagination<T>. This type as you can see in the class diagram above is passed to the view and used by the MVCContrib Grid and Pager components. Custom Provider To get the system to recognize our custom attributes, we create our MetadataProvider as mentioned in this article (http://bradwilson.typepad.com/blog/2010/01/why-you-dont-need-modelmetadataattributes.html) protected override ModelMetadata CreateMetadata(IEnumerable<Attribute> attributes, Type containerType, Func<object> modelAccessor, Type modelType, string propertyName) { ModelMetadata metadata = base.CreateMetadata(attributes, containerType, modelAccessor, modelType, propertyName);   SearchFilterAttribute searchFilterAttribute = attributes.OfType<SearchFilterAttribute>().FirstOrDefault(); if (searchFilterAttribute != null) { metadata.AdditionalValues.Add(Globals.SearchFilterAttributeKey, searchFilterAttribute); }   OrderByAttribute orderByAttribute = attributes.OfType<OrderByAttribute>().FirstOrDefault(); if (orderByAttribute != null) { metadata.AdditionalValues.Add(Globals.OrderByAttributeKey, orderByAttribute); }   return metadata; } We register our MetadataProvider in Global.asax.cs. protected void Application_Start() { AreaRegistration.RegisterAllAreas();   RegisterRoutes(RouteTable.Routes);   ModelMetadataProviders.Current = new MvcFlan.QueryModelMetaDataProvider(); } Bugs, Comments and Suggestions are welcome! You can download the sample code below. This code is purely experimental. Use at your own risk. Download Sample Code (VS 2010 RTM) MVCNorthwindSales.zip

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• Parallelism in .NET – Part 9, Configuration in PLINQ and TPL

  - by Reed

  Parallel LINQ and the Task Parallel Library contain many options for configuration.  Although the default configuration options are often ideal, there are times when customizing the behavior is desirable.  Both frameworks provide full configuration support. When working with Data Parallelism, there is one primary configuration option we often need to control – the number of threads we want the system to use when parallelizing our routine.  By default, PLINQ and the TPL both use the ThreadPool to schedule tasks.  Given the major improvements in the ThreadPool in CLR 4, this default behavior is often ideal.  However, there are times that the default behavior is not appropriate.  For example, if you are working on multiple threads simultaneously, and want to schedule parallel operations from within both threads, you might want to consider restricting each parallel operation to using a subset of the processing cores of the system.  Not doing this might over-parallelize your routine, which leads to inefficiencies from having too many context switches. In the Task Parallel Library, configuration is handled via the ParallelOptions class.  All of the methods of the Parallel class have an overload which accepts a ParallelOptions argument. We configure the Parallel class by setting the ParallelOptions.MaxDegreeOfParallelism property.  For example, let’s revisit one of the simple data parallel examples from Part 2: Parallel.For(0, pixelData.GetUpperBound(0), row => { for (int col=0; col < pixelData.GetUpperBound(1); ++col) { pixelData[row, col] = AdjustContrast(pixelData[row, col], minPixel, maxPixel); } }); .csharpcode, .csharpcode pre { font-size: small; color: black; font-family: consolas, "Courier New", courier, monospace; background-color: #ffffff; /*white-space: pre;*/ } .csharpcode pre { margin: 0em; } .csharpcode .rem { color: #008000; } .csharpcode .kwrd { color: #0000ff; } .csharpcode .str { color: #006080; } .csharpcode .op { color: #0000c0; } .csharpcode .preproc { color: #cc6633; } .csharpcode .asp { background-color: #ffff00; } .csharpcode .html { color: #800000; } .csharpcode .attr { color: #ff0000; } .csharpcode .alt { background-color: #f4f4f4; width: 100%; margin: 0em; } .csharpcode .lnum { color: #606060; } Here, we’re looping through an image, and calling a method on each pixel in the image.  If this was being done on a separate thread, and we knew another thread within our system was going to be doing a similar operation, we likely would want to restrict this to using half of the cores on the system.  This could be accomplished easily by doing: var options = new ParallelOptions(); options.MaxDegreeOfParallelism = Math.Max(Environment.ProcessorCount / 2, 1); Parallel.For(0, pixelData.GetUpperBound(0), options, row => { for (int col=0; col < pixelData.GetUpperBound(1); ++col) { pixelData[row, col] = AdjustContrast(pixelData[row, col], minPixel, maxPixel); } }); Now, we’re restricting this routine to using no more than half the cores in our system.  Note that I included a check to prevent a single core system from supplying zero; without this check, we’d potentially cause an exception.  I also did not hard code a specific value for the MaxDegreeOfParallelism property.  One of our goals when parallelizing a routine is allowing it to scale on better hardware.  Specifying a hard-coded value would contradict that goal. Parallel LINQ also supports configuration, and in fact, has quite a few more options for configuring the system.  The main configuration option we most often need is the same as our TPL option: we need to supply the maximum number of processing threads.  In PLINQ, this is done via a new extension method on ParallelQuery<T>: ParallelEnumerable.WithDegreeOfParallelism. Let’s revisit our declarative data parallelism sample from Part 6: double min = collection.AsParallel().Min(item => item.PerformComputation()); Here, we’re performing a computation on each element in the collection, and saving the minimum value of this operation.  If we wanted to restrict this to a limited number of threads, we would add our new extension method: int maxThreads = Math.Max(Environment.ProcessorCount / 2, 1); double min = collection .AsParallel() .WithDegreeOfParallelism(maxThreads) .Min(item => item.PerformComputation()); This automatically restricts the PLINQ query to half of the threads on the system. PLINQ provides some additional configuration options.  By default, PLINQ will occasionally revert to processing a query in parallel.  This occurs because many queries, if parallelized, typically actually cause an overall slowdown compared to a serial processing equivalent.  By analyzing the “shape” of the query, PLINQ often decides to run a query serially instead of in parallel.  This can occur for (taken from MSDN): Queries that contain a Select, indexed Where, indexed SelectMany, or ElementAt clause after an ordering or filtering operator that has removed or rearranged original indices. Queries that contain a Take, TakeWhile, Skip, SkipWhile operator and where indices in the source sequence are not in the original order. Queries that contain Zip or SequenceEquals, unless one of the data sources has an originally ordered index and the other data source is indexable (i.e. an array or IList(T)). Queries that contain Concat, unless it is applied to indexable data sources. Queries that contain Reverse, unless applied to an indexable data source. If the specific query follows these rules, PLINQ will run the query on a single thread.  However, none of these rules look at the specific work being done in the delegates, only at the “shape” of the query.  There are cases where running in parallel may still be beneficial, even if the shape is one where it typically parallelizes poorly.  In these cases, you can override the default behavior by using the WithExecutionMode extension method.  This would be done like so: var reversed = collection .AsParallel() .WithExecutionMode(ParallelExecutionMode.ForceParallelism) .Select(i => i.PerformComputation()) .Reverse(); Here, the default behavior would be to not parallelize the query unless collection implemented IList<T>.  We can force this to run in parallel by adding the WithExecutionMode extension method in the method chain. Finally, PLINQ has the ability to configure how results are returned.  When a query is filtering or selecting an input collection, the results will need to be streamed back into a single IEnumerable<T> result.  For example, the method above returns a new, reversed collection.  In this case, the processing of the collection will be done in parallel, but the results need to be streamed back to the caller serially, so they can be enumerated on a single thread. This streaming introduces overhead.  IEnumerable<T> isn’t designed with thread safety in mind, so the system needs to handle merging the parallel processes back into a single stream, which introduces synchronization issues.  There are two extremes of how this could be accomplished, but both extremes have disadvantages. The system could watch each thread, and whenever a thread produces a result, take that result and send it back to the caller.  This would mean that the calling thread would have access to the data as soon as data is available, which is the benefit of this approach.  However, it also means that every item is introducing synchronization overhead, since each item needs to be merged individually. On the other extreme, the system could wait until all of the results from all of the threads were ready, then push all of the results back to the calling thread in one shot.  The advantage here is that the least amount of synchronization is added to the system, which means the query will, on a whole, run the fastest.  However, the calling thread will have to wait for all elements to be processed, so this could introduce a long delay between when a parallel query begins and when results are returned. The default behavior in PLINQ is actually between these two extremes.  By default, PLINQ maintains an internal buffer, and chooses an optimal buffer size to maintain.  Query results are accumulated into the buffer, then returned in the IEnumerable<T> result in chunks.  This provides reasonably fast access to the results, as well as good overall throughput, in most scenarios. However, if we know the nature of our algorithm, we may decide we would prefer one of the other extremes.  This can be done by using the WithMergeOptions extension method.  For example, if we know that our PerformComputation() routine is very slow, but also variable in runtime, we may want to retrieve results as they are available, with no bufferring.  This can be done by changing our above routine to: var reversed = collection .AsParallel() .WithExecutionMode(ParallelExecutionMode.ForceParallelism) .WithMergeOptions(ParallelMergeOptions.NotBuffered) .Select(i => i.PerformComputation()) .Reverse(); On the other hand, if are already on a background thread, and we want to allow the system to maximize its speed, we might want to allow the system to fully buffer the results: var reversed = collection .AsParallel() .WithExecutionMode(ParallelExecutionMode.ForceParallelism) .WithMergeOptions(ParallelMergeOptions.FullyBuffered) .Select(i => i.PerformComputation()) .Reverse(); Notice, also, that you can specify multiple configuration options in a parallel query.  By chaining these extension methods together, we generate a query that will always run in parallel, and will always complete before making the results available in our IEnumerable<T>.

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• Using AuthzSVNAccessFile for controlling SVN Access produces HTTP 400 Bad Request

  - by meeper

  I have a new repository on an existing subversion server that requires us to perform path based authorization within the repository. I found that the AuthzSVNAccessFile directive in apache is directly responsible for allowing this functionality. After fixing several other problems such as AuthzSVNAccessFile preventing SVNListParentPath from operating properly, I am left with one single problem. I can checkout, I can update, I can commit, BUT I cannot execute an SVN COPY for performing branch/tagging operations. The moment I comment out the AuthzSVNAccessFile line in the Apache config everything works as expected except the obvious path authorizations. Versions: The server OS is Debian 6.0.7 (Squeeze) Apache 2.2.16-6+squeeze11 Server Subversion 1.6.12dfsg-7 Clients are running windows Clients tried are: TortoiseSVN 1.8.2 Build 24708 64bit SVN CLI Client 1.8.3 (r1516576) Authentication is performed via AD to a Windows 2003 domain and appears to be operating normally. I have stripped out all other configurations and repository setups to produce this single configuration that reproduces the problem. Apache Configuration: <VirtualHost *:443> ServerName svn-test.company.com ServerAlias /svn-test ServerAdmin [email protected] SSLEngine On SSLCertificateFile /etc/apache2/apache.pem ErrorLog /var/log/apache2/svn-test_error.log LogLevel warn CustomLog /var/log/apache2/svn-test_access.log combined ServerSignature On # Repository Access to all Repositories <Location "/"> DAV svn SVNParentPath /var/svn SVNListParentPath on AuthBasicProvider ldap AuthType Basic AuthzLDAPAuthoritative Off AuthName "Subversion Test Repository System" AuthLDAPURL "ldap://adserver.company.com:389/DC=corp,DC=company,DC=com?sAMAccountName?sub?(objectClass=*)" NONE AuthLDAPBindDN "CN=service_account,OU=ServiceIDs,OU=corp,OU=Delegated,DC=na,DC=corp,DC=company,DC=com" AuthLDAPBindPassword service_account_password Require valid-user SSLRequireSSL </Location> # <LocationMatch /.+> is a really dirty trick to make listing of repositories work # http://d.hatena.ne.jp/shimonoakio/20080130/1201686016 <LocationMatch /.+> AuthzSVNAccessFile /etc/apache2/svn_path_auth </LocationMatch> </VirtualHost> SVN Access File: [/] * = rw The repository used (AuthTestBasic) consists of the following directory structure and contains no externals (this is a literal listing, not an example): / /branches/ /tags/ /trunk/ /trunk/somefile.txt Tortoise produces the following error during a tag operation in it's tag result window: Adding directory failed: COPY on /authtestbasic/!svn/bc/2/trunk (400 Bad Request) The svn.exe CLI client produces the following error: C:\Users\e20epkt>svn copy https://servername/authtestbasic/trunk https://servername/authtestbasic/tags/tag1 -m "svn cli client" svn: E175002: Adding directory failed: COPY on /authtestbasic/!svn/bc/2/trunk (400 Bad Request) The Apache error log has nothing in it, however the apache access log has the following in it (IP addresses and usernames changed obviously): 10.1.2.100 - - [17/Oct/2013:11:53:40 -0700] "OPTIONS /authtestbasic/trunk HTTP/1.1" 401 2595 "-" "SVN/1.8.3 (x64-microsoft-windows) serf/1.3.1 TortoiseSVN-1.8.2.24708" 10.1.2.100 - myuseraccount [17/Oct/2013:11:53:40 -0700] "OPTIONS /authtestbasic/trunk HTTP/1.1" 200 996 "-" "SVN/1.8.3 (x64-microsoft-windows) serf/1.3.1 TortoiseSVN-1.8.2.24708" 10.1.2.100 - myuseraccount [17/Oct/2013:11:53:40 -0700] "OPTIONS /authtestbasic/trunk HTTP/1.1" 200 884 "-" "SVN/1.8.3 (x64-microsoft-windows) serf/1.3.1 TortoiseSVN-1.8.2.24708" 10.1.2.100 - myuseraccount [17/Oct/2013:11:53:40 -0700] "PROPFIND /authtestbasic/trunk HTTP/1.1" 207 692 "-" "SVN/1.8.3 (x64-microsoft-windows) serf/1.3.1 TortoiseSVN-1.8.2.24708" 10.1.2.100 - myuseraccount [17/Oct/2013:11:53:40 -0700] "PROPFIND /authtestbasic/!svn/vcc/default HTTP/1.1" 207 596 "-" "SVN/1.8.3 (x64-microsoft-windows) serf/1.3.1 TortoiseSVN-1.8.2.24708" 10.1.2.100 - myuseraccount [17/Oct/2013:11:53:40 -0700] "REPORT /authtestbasic/!svn/bc/0/trunk HTTP/1.1" 404 580 "-" "SVN/1.8.3 (x64-microsoft-windows) serf/1.3.1 TortoiseSVN-1.8.2.24708" 10.1.2.100 - myuseraccount [17/Oct/2013:11:53:40 -0700] "PROPFIND /authtestbasic/!svn/vcc/default HTTP/1.1" 207 596 "-" "SVN/1.8.3 (x64-microsoft-windows) serf/1.3.1 TortoiseSVN-1.8.2.24708" 10.1.2.100 - myuseraccount [17/Oct/2013:11:53:40 -0700] "REPORT /authtestbasic/!svn/bc/2/trunk HTTP/1.1" 200 674 "-" "SVN/1.8.3 (x64-microsoft-windows) serf/1.3.1 TortoiseSVN-1.8.2.24708" 10.1.2.100 - myuseraccount [17/Oct/2013:11:53:40 -0700] "PROPFIND /authtestbasic/!svn/bc/2/trunk HTTP/1.1" 207 548 "-" "SVN/1.8.3 (x64-microsoft-windows) serf/1.3.1 TortoiseSVN-1.8.2.24708" 10.1.2.100 - myuseraccount [17/Oct/2013:11:53:40 -0700] "PROPFIND /authtestbasic/tags/tag1 HTTP/1.1" 404 580 "-" "SVN/1.8.3 (x64-microsoft-windows) serf/1.3.1 TortoiseSVN-1.8.2.24708" 10.1.2.100 - myuseraccount [17/Oct/2013:11:53:40 -0700] "MKACTIVITY /authtestbasic/!svn/act/f1e9dc07-fb5e-5a41-ac22-907705ef6e5e HTTP/1.1" 201 708 "-" "SVN/1.8.3 (x64-microsoft-windows) serf/1.3.1 TortoiseSVN-1.8.2.24708" 10.1.2.100 - myuseraccount [17/Oct/2013:11:53:40 -0700] "PROPFIND /authtestbasic/tags HTTP/1.1" 207 580 "-" "SVN/1.8.3 (x64-microsoft-windows) serf/1.3.1 TortoiseSVN-1.8.2.24708" 10.1.2.100 - myuseraccount [17/Oct/2013:11:53:40 -0700] "CHECKOUT /authtestbasic/!svn/vcc/default HTTP/1.1" 201 708 "-" "SVN/1.8.3 (x64-microsoft-windows) serf/1.3.1 TortoiseSVN-1.8.2.24708" 10.1.2.100 - myuseraccount [17/Oct/2013:11:53:40 -0700] "PROPPATCH /authtestbasic/!svn/wbl/f1e9dc07-fb5e-5a41-ac22-907705ef6e5e/2 HTTP/1.1" 207 596 "-" "SVN/1.8.3 (x64-microsoft-windows) serf/1.3.1 TortoiseSVN-1.8.2.24708" 10.1.2.100 - myuseraccount [17/Oct/2013:11:53:40 -0700] "CHECKOUT /authtestbasic/!svn/ver/1/tags HTTP/1.1" 201 724 "-" "SVN/1.8.3 (x64-microsoft-windows) serf/1.3.1 TortoiseSVN-1.8.2.24708" 10.1.2.100 - myuseraccount [17/Oct/2013:11:53:40 -0700] "COPY /authtestbasic/!svn/bc/2/trunk HTTP/1.1" 400 596 "-" "SVN/1.8.3 (x64-microsoft-windows) serf/1.3.1 TortoiseSVN-1.8.2.24708" 10.1.2.100 - myuseraccount [17/Oct/2013:11:53:40 -0700] "DELETE /authtestbasic/!svn/act/f1e9dc07-fb5e-5a41-ac22-907705ef6e5e HTTP/1.1" 204 1956 "-" "SVN/1.8.3 (x64-microsoft-windows) serf/1.3.1 TortoiseSVN-1.8.2.24708" You'll see that the second to last line contains the COPY command with the HTTP 400 response, however, there doesn't appear to be any indication as to why. Please note that, while yes this is a test repository on a test server, I am experiencing this same issue in this test setup where I have eliminated all other possible causes (mixed repository configurations, externals, etc). I have also confirmed that all files for the repository (/var/svn/authtestbasic) are owned by the Apache user www-data.

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