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• Windows services with windows forms in the same process

  - by andrecarlucci

  Hello, I have a c# application that runs as a windows service controlling socket connections and other things. Also, there is another windows forms application to control and configure this service (systray with start, stop, show form with configuration parameters). I'm using .net remoting to do the IPC and that was fine, but now I want to show some real traffic and other reports and remoting will not meet my performance requirements. So I want to combine both applications in one. Here is the problem: When I started the form from the windows service, nothing happened. Googling around I've found that I have to right click the service, go to Log on and check the "Allow service to interact with desktop" option. Since I don't want to ask my users to do that, I got some code googling again to set this option in the user's regedit during installation time. The problem is that even setting this option, it doesn't work. I have to open the Log On options of the service (it is checked), uncheck and check again. So, how to solve that? How is the best way to have a windows service with a systray control in the same process, available to any user logging in? UPDATE: Thanks for the comments so far, guys. I agree it is better to use IPC and I know that it is bad to mix windows services and user interfaces. Even though, I want to know how to do that.

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• FullCalendar and events: function

  - by Ernest

  I am trying to display my events from a MySQL database. I'm using the events function. My XML file being returned is pretty basic. I've looked at all of the FullCalendar questions and most of them talk about JSON and point to the documentation for JSON. I can't use JSON. I have to go XML. Can you tell me where I'm off. Here is a sample of what my xml looks like: Grow Your Business on the Web 2010-06-05T9:30 2010-06-05T12:30 O The whole file is prefaced with a tag and closed with a tag. My jquery is as follows: $(document).ready(function() { $('#calendar').fullCalendar({ height: 550, theme: true, header: { left: 'prev,next today', center: 'title', right: 'month,agendaWeek,agendaDay' }, editable: true, events: function(start, end, callback) { $.ajax({ url: 'ncludeFiles/sbdp-cal-xml.php', dataType: 'xml', data: { // our hypothetical feed requires UNIX timestamps start: Math.round(start.getTime() / 1000), end: Math.round(end.getTime() / 1000) }, success: function(doc) { var events = []; $(doc).find('event').each(function() { events.push({ title: $(this).attr('title'), start: $(this).attr('start'), end: $(this).attr('end'), className: $(this).attr('className'), url: $(this).attr('url') }); }); callback(events); } }); } }); }); I'd appreciate any help you could give me. Thanks!

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• How to make Python Extensions for Windows for absolute beginners

  - by JR

  Hello: I've been looking around the internet trying to find a good step by step guide to extend Python in Windows, and I haven't been able to find something for my skill level. let's say you have some c code that looks like this: #include <stdio.h> #include <math.h> double valuex(float value, double rate, double timex) { float value; double rate, timex; return value / double pow ((1 + rate), (timex)); } and you want to turn that into a Python 3 module for use on a windows (64bit if that makes a difference) system. How would you go about doing that? I've looked up SWIG and Pyrex and in both circumstances they seem geared towards the unix user. With Pyrex I am not sure if it works with Python 3. I'm just trying to learn the basics of programing, using some practical examples. Lastly, if there is a good book that someone can recommend for learning to extend, I would greatly appreciate it. Thank you.

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• Newbie, deciding Python or Erlang

  - by Joe

  Hi Guys, I'm a Administrator (unix, Linux and some windows apps such as Exchange) by experience and have never worked on any programming language besides C# and scripting on Bash and lately on powershell. I'm starting out as a service provider and using multiple network/server monitoring tools based on open source (nagios, opennms etc) in order to monitor them. At this moment, being inspired by a design that I came up with, to do more than what is available with the open source at this time, I would like to start programming and test some of these ideas. The requirement is that a server software that captures a stream of data and store them in a database(CouchDB or MongoDB preferably) and the client side (agent installed on a server) would be sending this stream of data on a schedule of every 10 minutes or so. For these two core ideas, I have been reading about Python and Erlang besides ruby. I do plan to use either Amazon or Rackspace where the server platform would run. This gives me the scalability needed when we have more customers with many servers. For that reason alone, I thought Erlang was a better fit(I could be totally wrong, new to this game) and I understand that Erlang has limited support in some ways compared to Ruby or Python. But also I'm totally new to the programming realm of things and any advise would be appreciated grately. Jo

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• python mechanize.browser submit() related problem

  - by paul

  Hello All im making some script with mechanize.browser module. one of problem is all other thing is ok, but when submit() form,it not working, so i was found some suspicion source part. in the html source i was found such like following. <form method="post" onsubmit="return loginCheck(this)" name="FRMLOGIN"/> im thinking, loginCheck(this) making problem when submit form. but how to handle this kind of javascript function with mechanize module ,so i can successfully submit form and can receive result? folloing is my current script source. if anyone can help me ..much appreciate!! # -*- coding: cp949-*- import sys,os import mechanize, urllib import cookielib from BeautifulSoup import BeautifulSoup,BeautifulStoneSoup,Tag import datetime, time, socket import re,sys,os,mechanize,urllib,time br = mechanize.Browser() cj = cookielib.LWPCookieJar() br.set_cookiejar(cj) # Browser options br.set_handle_equiv(True) br.set_handle_gzip(True) br.set_handle_redirect(True) br.set_handle_referer(True) br.set_handle_robots(False) # Follows refresh 0 but not hangs on refresh > 0 br.set_handle_refresh(mechanize._http.HTTPRefreshProcessor(), max_time=1) # Want debugging messages? br.set_debug_http(True) br.set_debug_redirects(True) br.set_debug_responses(True) # User-Agent (this is cheating, ok?) br.addheaders = [('User-agent', 'Mozilla/5.0 (Windows; U; Windows NT 6.0; en-US; rv:1.9.0.6')] br.open('http://user.buddybuddy.co.kr/Login/LoginForm.asp?URL=') html = br.response().read() print html br.select_form(name='FRMLOGIN') print br.viewing_html() br.form['ID']='zero1zero2' br.form['PWD']='012045' br.submit() print br.response().read()

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• Client-Server Networking Between PHP Client and Java Server

  - by Muhammad Yasir

  Hi there, I have a university project which is already 99% completed. It consists of two parts-website (PHP) and desktop (Java). People have their accounts on the website and they wish to query different information regarding their accounts. They send an SMS which is received by desktop application which queries database of website (MySQL) and sends the reply accordingly. This part is working superbly. The problem is that some times website wishes to instruct the desktop application to send a specific SMS to a particular number. Apparently there seems no way other than putting all the load to the DB server... This is how I made it work. Website puts SMS jobs in a specific table. Java application polls this table again and again and if it finds a job, it executes it. Even this part is working correctly but unfortunately it is not acceptable by my university to poll the DB like this. :( The other approach I could think of is to use client-server one. I tried making Java server and its PHP client. So that whenever an SMS is to be sent, the website opens a socket connection to desktop application and sends two strings (cell # and SMS message). Unfortunately I am unable to do this. I was successfully to make a Java server which works fine when connected by a Java client, similarly my PHP client connects correctly to a PHP server, but when I try to cross them, they start hating each other... PHP shows no error but Java gives StreamCorruptedException when it tries to read header of input stream. Could someone please tell what I can try to make PHP client and Java server work together? Or if the said purpose can be achieved by another means, how? Regards, Yasir

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• Using Freepascal\Lazarus JSON Libraries

  - by Gizmo_the_Great

  I'm hoping for a bit of a "simpletons" demo\explanation for using Lazarus\Freepascal JSON parsing. I've asked a question here but all the replies are "read this" and none of them are really helping me get a grasp because the examples are bit too in-depth and I'm seeking a very simple example to help me understand how it works. In brief, my program reads an untyped binary file in chunks of 4096 bytes. The raw data then gets converted to ASCII and stored in a string. It then goes through the variable looking for certain patterns, which, it turned out, are JSON data structures. I've currently coded the parsing the hard way using Pos and ExtractANSIString etc. But I'vesince learnt that there are JSON libraries for Lazarus & FPC, namely fcl-json, fpjson, jsonparser, jsonscanner etc. https://bitbucket.org/reiniero/fpctwit/src http://fossies.org/unix/misc/fpcbuild-2.6.0.tar.gz:a/fpcbuild-2.6.0/fpcsrc/packages/fcl-json/src/ http://svn.freepascal.org/cgi-bin/viewvc.cgi/trunk/packages/fcl-json/examples/ However, I still can't quite work out HOW I read my string variable and parse it for JSON data and then access those JSON structures. Can anyone give me a very simple example, to help getting me going? My code so far (without JSON) is something like this: try SourceFile.Position := 0; while TotalBytesRead < SourceFile.Size do begin BytesRead := SourceFile.Read(Buffer,sizeof(Buffer)); inc(TotalBytesRead, BytesRead); StringContent := StripNonAsciiExceptCRLF(Buffer); // A custom function to strip out binary garbage leaving just ASCII readable text if Pos('MySearchValue', StringContent) > 0 then begin // Do the parsing. This is where I need to do the JSON stuff ...

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• Sync Vs. Async Sockets Performance in C#

  - by Michael Covelli

  Everything that I read about sockets in .NET says that the asynchronous pattern gives better performance (especially with the new SocketAsyncEventArgs which saves on the allocation). I think this makes sense if we're talking about a server with many client connections where its not possible to allocate one thread per connection. Then I can see the advantage of using the ThreadPool threads and getting async callbacks on them. But in my app, I'm the client and I just need to listen to one server sending market tick data over one tcp connection. Right now, I create a single thread, set the priority to Highest, and call Socket.Receive() with it. My thread blocks on this call and wakes up once new data arrives. If I were to switch this to an async pattern so that I get a callback when there's new data, I see two issues The threadpool threads will have default priority so it seems they will be strictly worse than my own thread which has Highest priority. I'll still have to send everything through a single thread at some point. Say that I get N callbacks at almost the same time on N different threadpool threads notifying me that there's new data. The N byte arrays that they deliver can't be processed on the threadpool threads because there's no guarantee that they represent N unique market data messages because TCP is stream based. I'll have to lock and put the bytes into an array anyway and signal some other thread that can process what's in the array. So I'm not sure what having N threadpool threads is buying me. Am I thinking about this wrong? Is there a reason to use the Async patter in my specific case of one client connected to one server?

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• Silverlight and clientaccesspolicy.xml

  - by JerA

  I have a silverlight app hosted on "dev.system-engine.com" which creates an tcp connection connecting to "dev.system-engine.com" the silverlight app and the policy file are on the "dev.system-engine.com" webserver. "system-engine.com" and "dev.system-engine.com" are separate servers. I cannot seem to get it to work. I have been struggling with the policyfile. <?xml version="1.0" encoding="utf-8" ?> <access-policy> <cross-domain-access> <policy> <allow-from> <domain uri="http://dev.system-engine.com:80"/> </allow-from> <grant-to> <domain uri="http://dev.system-engine.com:80"/> <socket-resource port="80" protocol="tcp"/> <resource path="/" include-subpaths="true"/> </grant-to> </policy>

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• empty response body in ajax (or 206 Partial Content)

  - by Nikita Rybak

  Hi guys, I'm feeling completely stupid because I've spent two hours solving task which should be very simple and which I solved many times before. But now I'm not even sure in which direction to dig. I fail to fetch static content using ajax from local servers (Apache and Mongrel). I get responses 200 and 206 (depending on the server), empty response text (although Content-Length header is always correct), firebug shows request in red. Javascript is very generic, I'm getting same results even here: http://www.w3schools.com/ajax/tryit.asp?filename=tryajax_first (just change document location to 'http://localhost:3000/whatever') So, it's probably not the cause. Well, now I'm out of ideas. I can also post http headers, if it'll help. Thanks! Response Headers Connection close Date Sat, 01 May 2010 21:05:23 GMT Last-Modified Sun, 18 Apr 2010 19:33:26 GMT Content-Type text/html Content-Length 7466 Request Headers Host localhost:3000 User-Agent Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10.6; en-US; rv:1.9.2.3) Gecko/20100401 Firefox/3.6.3 Accept text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8 Accept-Language en-us,en;q=0.5 Accept-Encoding gzip,deflate Accept-Charset ISO-8859-1,utf-8;q=0.7,*;q=0.7 Keep-Alive 115 Connection keep-alive Referer http://www.w3schools.com/ajax/tryit_view.asp Origin http://www.w3schools.com Response Headers Date Sat, 01 May 2010 21:54:59 GMT Server Apache/2.2.14 (Unix) mod_ssl/2.2.14 OpenSSL/0.9.8l DAV/2 mod_jk/1.2.28 Etag "3d5cbdb-fb4-4819c460d4a40" Accept-Ranges bytes Content-Length 4020 Cache-Control max-age=7200, public, proxy-revalidate Expires Sat, 01 May 2010 23:54:59 GMT Content-Range bytes 0-4019/4020 Keep-Alive timeout=5, max=100 Connection Keep-Alive Content-Type application/javascript Request Headers Host localhost User-Agent Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10.6; en-US; rv:1.9.2.3) Gecko/20100401 Firefox/3.6.3 Accept text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8 Accept-Language en-us,en;q=0.5 Accept-Encoding gzip,deflate Accept-Charset ISO-8859-1,utf-8;q=0.7,*;q=0.7 Keep-Alive 115 Connection keep-alive Origin null

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• Javamail read multipart emails

  - by Hectai

  Hey! My code is below, and the problem is that some of the emails i get from my POP3 account cannot be read, but with a simple unix email client it can be. It would be very helpful if you can find me what the problem is, or give me some advices. ps.: yes, i have read the tutorials already. String[] messageText = new String[500]; Store store = session.getStore("pop3"); store.connect(host, username, password); Folder inbox = store.getFolder("INBOX"); inbox.open(Folder.READ_ONLY); Message[] messages = inbox.getMessages(); for(int i = 0; i < inbox.getMessageCount() ; i++) { Message m = messages[i]; Object o = m.getContent(); if (o instanceof String) messageText[i] = (String)o; else if(o instanceof Multipart) { Multipart mp = (Multipart)o; int count = mp.getCount(); for(int j = 0; j < count; j++) { BodyPart b = mp.getBodyPart(j); String disposition = b.getDisposition(); if (disposition != null && disposition.equals(BodyPart.ATTACHMENT))) { DataHandler handler = b.getDataHandler(); messageText[i] += "file name : " + handler.getName(); } else { messageText[i] += b.getContent(); } } } } store.close(); } catch(Exception ex) { notif("Failure - " + ex.getMessage()); }

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• drupal using node.save with XMLRPC call to another site. "Access Denied" message

  - by EricP

  I have a piece of code on 1 drupal site to create a node another drupal site in a multi-site setup. It looks like I'm getting the sessionid and logging in just fine, but when trying to create a "page" node, I get "Access denied". Under Services - Settings I have "Key Authentication", "Use keys" is unchecked, and "Use sessid" is checked. Below is my code: <p>Test Page 1</p> <? $url = 'http://drupal2.dev/xmlrpc.php'; ?> <? $conn = xmlrpc($url, 'system.connect'); print_r($conn); ?> <p>--</p> <? $login = xmlrpc($url, 'user.login', $conn['sessid'], 'superuser_name', 'superuser_password'); print_r($login); ?> <p>--</p> <? $data=array('type'=>'page', 'title'=>'Test', 'body'=>'test'); $data_s=serialize($data); $result = xmlrpc($url, 'node.save', $login['sessid'], $data_s); echo $result; //echo $data_s; ?> <? if($error = xmlrpc_error()){ if($error->code > 0){ $error->message = t('Outgoing HTTP request failed because the socket could not be opened.'); } drupal_set_message(t('Operation failed because the remote site gave an error: %message (@code).', array( '%message' => $error->message, '@code' => $error->code ) ) ); } ?> thanks for the help.

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• How does Visual Studio decide the order in which stack variables should be allocated?

  - by Jason

  I'm trying to turn some of the programs in gera's Insecure Programming by example into client/server applications that could be used in capture the flag scenarios to teach exploit development. The problem I'm having is that I'm not sure how Visual Studio (I'm using 2005 Professional Edition) decides where to allocate variables on the stack. When I compile and run example 1: int main() { int cookie; char buf[80]; printf("buf: %08x cookie: %08x\n", &buf, &cookie); gets(buf); if (cookie == 0x41424344) printf("you win!\n"); } I get the following result: buf: 0012ff14 cookie: 0012ff64 buf starts at an address eighty bytes lower than cookie, and any four bytes that are copied in buf after the first eighty will appear in cookie. The problem I'm having is when I place this code in some other function. When I compile and run the following code, I get a different result: buf appears at an address greater than cookie's. void ClientSocketHandler(SOCKET cs){ int cookie; char buf[80]; char stringToSend[160]; int numBytesRecved; int totalNumBytes; sprintf(stringToSend,"buf: %08x cookie: %08x\n",&buf,&cookie); send(cs,stringToSend,strlen(stringToSend),NULL); The result is: buf: 0012fd00 cookie: 0012fcfc Now there is no way to set cookie to arbitrary data via overwriting buf. Is there any way to tell Visual Studio to allocate cookie before buf? Is there any way to tell beforehand how the variables will be allocated? Thanks, Jason

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• recent cvs cygwin newline windows problems. How to solve?

  - by user72150

  Hi all, One of our projects still uses CVS. Recently (sometime in the past year) the Cygwin cvs client (currently using 1.12.13) has given me problems when I update. I suspect the problem stems from windows/unix newline differences. It worked for years without a problem. Here are the symptoms. When I update from the command line, I see messages like these: "no such repository" messages /cvshome : no such repository False-"Modified" due to newline differences M java/com/foo/ekm/value/EkmContainerInstance.java False-"Conflicts" cvs update: Updating java/com/foo/ekm/value/XWiki cvs update: move away `java/com/foo/ekm/value/XWiki/XWikiContainerInstance.java'; it is in the way C java/com/foo/ekm/value/XWiki/XWikiContainerInstance.java Note the for the 'no such repository' error, I found that cd-ing into the 'CVS/' folder and running 'dos2unix Root' updates correctly. I'm not sure how this file (or Repository or Entries) gets whacked. I don't remember when these problems started. I have a workaround: updating from our IDE (Intellij Idea) always succeeds Yes, I know we should switch to (svn|git|mercurial), but does anyone know what causes these problems? when they were introduced? workarounds? thanks, bill

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• Problems compiling peazip on OSX

  - by Yansky

  I'm having some problems with compiling Peazip on OSX (10.6). I emailed the Peazip developer and he said he probably couldn't help me too much as the error seems to be OSX specific and he doesn't have access to an OSX machine any more. The compiler I'm using is Lazarus as the source is in Pascal. The actual compile process seems to go ok, but when I run the peazip.app program launcher, I get the following error: http://img.photobucket.com/albums/v215/thegooddale/Screen-shot-2010-05-22-at-71907-PM.png Here is the app launcher that the compile made: http://forboden.com/coding/peazip.app.zip - you can use an unzip program to look at the files inside (i.e. unzip it twice). I also tried just running the peazip unix file executable that was produced after the compile from the terminal and I got this: http://img.photobucket.com/albums/v215/thegooddale/Screen-shot-2010-05-22-at-72148-PM.png Here are the messages from the compile log from Lazarus while compiling Peazip: http://pastebin.com/qK4bdncL (I asked on the Lazarus forums and they said I can just ignore those "ld: warning: unknown stabs type" warnings). Here is the info from the project_peach.compiled file: <?xml version="1.0"?> <CONFIG> <Compiler Value="/usr/local/bin/ppc386" Date="1238949773"/> <Params Value=" -MObjFPC -Sgi -O1 -gl -k-framework -kCarbon -k-framework -kOpenGL -k'-dylib_file' -k'/System/Library/Frameworks/OpenGL.framework/Versions/A/Libraries/libGL.dylib:/System/Library/Frameworks/OpenGL.framework/Versions/A/Libraries/libGL.dylib' -WG -vewnhi -l -Fu/Users/yansky/Desktop/peazip-3.1.src/res/themes/crystalc/ -Fu/Developer/lazarus/components/synedit/units/i386-darwin/ -Fu/Developer/lazarus/ideintf/units/i386-darwin/ -Fu/Developer/lazarus/lcl/units/i386-darwin/ -Fu/Developer/lazarus/lcl/units/i386-darwin/carbon/ -Fu/Developer/lazarus/packager/units/i386-darwin/ -Fu/Users/yansky/Desktop/peazip-3.1.src/ -Fu. -opeazip -dLCL -dLCLcarbon project_peach.lpr"/> </CONFIG> I guess there's little chance that anyone here has experience with Pascal and Lazarus since it's not that popular a language and the compiler is still in beta, but I thought I would post here in the hopes that someone might point me in the right general direction about where/how the peazip.app launcher is breaking.

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• what type of bug causes a program to slowly use more processor power and all of a sudden go to 100%?

  - by reinier

  Hi, I was hoping to get some good ideas as to what might be causing a really nasty bug. This is a program which is transmitting data over a socket, and also receives messages back. I could explain lots more, but I don't think this will help here. I'm just searching for hypothetical problems which can cause the following behaviour: program runs processor time slowly accumulates (till around 60%) all of a sudden (could be after 30 but also after 60 seconds) the processor time shoots to 100%. the program halts completely In my syslog it always ends on one line with a memory allocation (something similar to: myArray = new byte[16384]) in the same thread. now here is the weird part: if I set the debugger anywhere...it immediately stops on that line. So just the act of setting a breakpoint, made the thread continue (it wasn't running since I saw no log output anymore) I was thinking 'deadlock' but that would not cause 100% processor power. If anything, the opposite. Also, setting a breakpoint would not cause a deadlock to end. anyone else a theoretical suggestion as to what kind of 'construct' might cause this effect? (apart from 'bad programming') ;^) thanks EDIT: I just noticed.... by setting the sendspeed slower, the problem shows itself much later than expected. I would think around the same amount of packets send...but no the amount of packets send is much higher this way before it has the same problem.

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• Emacs Lisp: how to set encoding for call-process

  - by RamyenHead

  I thought I knew how to set coding-system (or encoding): use process-coding-system-alist. Apparently, it's not working. ;; -*- coding: utf-8 -*- (require 'cl) (let ((process-coding-system-alist '("cygwin/bin/bash" . (utf-8-dos . utf-8-unix)))) (setq my-words (list "Lilo" "?_?" "_?" "?_" "?" "Stitch") my-cygwin-bash "C:/cygwin/bin/bash.exe" my-outbuf (get-buffer-create "*my cygwin bash echo test*") ) (with-current-buffer my-outbuf (goto-char (point-max)) (loop for word in my-words do (insert (concat "echo " word "\n")) (call-process my-cygwin-bash nil my-outbuf nil "-c" (concat "echo " word))) ) (display-buffer my-outbuf) ) Running the above code, the output is this: echo Lilo Lilo echo ?_? /usr/bin/bash: -c: line 0: unexpected EOF while looking for matching `"' /usr/bin/bash: -c: line 1: syntax error: unexpected end of file echo _? /usr/bin/bash: -c: line 0: unexpected EOF while looking for matching `"' /usr/bin/bash: -c: line 1: syntax error: unexpected end of file echo ?_ /usr/bin/bash: $'echo \346\267\205?': command not found echo ? /usr/bin/bash: -c: line 0: unexpected EOF while looking for matching `"' /usr/bin/bash: -c: line 1: syntax error: unexpected end of file echo Stitch Stitch Anything sent to cygwin in unicode is failing (MS Windows, Korean).

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• Why does the the Java VM not recover after "Too many open files" errors?

  - by Michael

  In certain well-understood circumstances, our application will open too many sockets (database connections) and reach the maximum open files that the OS allows. We understand this; we are fixing the issue and also bumping up the limit. What we can't explain is why parts of our application don't recover even after the number of connections abates and we're well within the limit. In this case, it's an application running under Tomcat. When this happens, we first start seeing "Too many open files" errors: SEVERE: Socket accept failed java.net.SocketException: Too many open files at java.net.PlainSocketImpl.socketAccept(Native Method) at java.net.PlainSocketImpl.accept(PlainSocketImpl.java:390) at java.net.ServerSocket.implAccept(ServerSocket.java:453) at java.net.ServerSocket.accept(ServerSocket.java:421) at org.apache.tomcat.util.net.DefaultServerSocketFactory.acceptSocket(DefaultServerSocketFactory.java:61) at org.apache.tomcat.util.net.JIoEndpoint$Acceptor.run(JIoEndpoint.java:310) at java.lang.Thread.run(Thread.java:619) Eventually, we start seeing NoClassDefFoundErrors inside an application thread that's trying to open HTTP connections: java.lang.NoClassDefFoundError: org/apache/commons/httpclient/protocol/ControllerThreadSocketFactory at org.apache.commons.httpclient.protocol.DefaultProtocolSocketFactory.createSocket(DefaultProtocolSocketFactory.java:128) at org.apache.commons.httpclient.HttpConnection.open(HttpConnection.java:707) at org.apache.commons.httpclient.MultiThreadedHttpConnectionManager$HttpConnectionAdapter.open(MultiThreadedHttpConnectionManager.java:1349) [...] Caused by: java.lang.ClassNotFoundException: org.apache.commons.httpclient.protocol.ControllerThreadSocketFactory at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1387) at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1233) at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:320) ... 8 more When the errant connections go away, the server starts accepting connections again, and everything seems ok, but we're left with the latter error constantly being spewed to stderr. Although the application typically logs unloaded classes to stdout, I don't see any such logs just before, during or after the "Too many open files" errors. My initial theory was that the Hotspot JVM would unload seemingly unused classes when it encounters "Too many open files," but if so, it doesn't log the fact. I'd also expect it to recover if that were the case. Platform details: Java(TM) SE Runtime Environment (build 1.6.0_14-b08) Java HotSpot(TM) 64-Bit Server VM (build 14.0-b16, mixed mode) Apache Tomcat Version 6.0.18

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• using wget against protected site with NTLM

  - by Joey V.

  Trying to mirror a local intranet site and have found previous questions using 'wget'. It works great with sites that are anonymous, but I have not been able to use it against a site that is expecting username\password (IIS with Integrated Windows Authentication). Here is what I pass in: wget -c --http-user='domain\user' --http-password=pwd http://local/site -dv Here is the debug output (note I replaced some with dummy values obviously): Setting --verbose (verbose) to 1 DEBUG output created by Wget 1.11.4 on Windows-MSVC. --2009-07-14 09:39:04-- http://local/site Host `local' has not issued a general basic challenge. Resolving local... seconds 0.00, x.x.x.x Caching local = x.x.x.x Connecting to local|x.x.x.x|:80... seconds 0.00, connected. Created socket 1896. Releasing 0x003e32b0 (new refcount 1). ---request begin--- GET /site/ HTTP/1.0 User-Agent: Wget/1.11.4 Accept: */* Host: local Connection: Keep-Alive ---request end--- HTTP request sent, awaiting response... ---response begin--- HTTP/1.1 401 Access Denied Server: Microsoft-IIS/5.1 Date: Tue, 14 Jul 2009 13:39:04 GMT WWW-Authenticate: Negotiate WWW-Authenticate: NTLM Content-Length: 4431 Content-Type: text/html ---response end--- 401 Access Denied Closed fd 1896 Unknown authentication scheme. Authorization failed.

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• no pg_hba.conf entry for host

  - by Priya

  Hi All I am new to Perl as well as Postgresql I get following error when i try to connect using DBI DBI connect('database=chaosLRdb;host=192.168.0.1;port=5433','postgres',...) failed: FATAL: no pg_hba.conf entry for host "192.168.0.1", user "postgres", database "chaosLRdb", SSL off Here is my pg_hba.conf file: # "local" is for Unix domain socket connections only local all all md5 # IPv4 local connections: host all all 127.0.0.1/32 md5 # IPv6 local connections: host all all ::1/128 md5 host all postgres 127.0.0.1/32 trust host all postgres 192.168.0.1/32 trust host all all 192.168.0.1/32 trust host all all 192.168.0.1/128 trust host all all 192.168.0.1/32 md5 host chaosLRdb postgres 192.168.0.1/32 md5 local all all 192.168.0.1/32 trust My perl code is #!/usr/bin/perl-w use DBI; use FileHandle; print "Start connecting to the DB...\n"; @ary = DBI->available_drivers(true); %drivers = DBI->installed_drivers(); my $dbh = DBI->connect("DBI:PgPP:database=chaosLRdb;host=192.168.0.1;port=5433", "postgres", "chaos123"); May I know what i miss here?

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• Best method of achieving bi-directional communication between Apple iPad "clients" and a Windows Ser

  - by user361910

  We are currently starting to build a client-server system which will see 10 or more Apple iPad client devices communicating to a central Windows server over a wireless LAN. We wanted to some existing plumbing (.NET remoting/WCF/web services/etc) that would allow us to implement a reliable, secure solution without having to start at a low level (e.g. sockets) and recreate the wheel. One of the major requirements that complicates this scenario is that unlike a traditional web service, the windows server needs to be able to arbitrarily notify the clients whenever certain events occur -- so it is not a simple request/response scenario like the web. Initially, we were going to use Windows clients, so our plan was to use the full-duplex mode of .NET WCF over HTTP|TCP. But now using the iPad, we don't have any of the WCF infrastructure. So my question is: what is the best way to allow an iPad and a Windows server to (securely) communicate over a LAN, with each device able to initiate communication to the other? Am I stuck writing low-level socket code? Thanks!

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• Java: What are the various available security settings for applets

  - by bguiz

  I have an applet that throws this exception when trying to communicate with the server (running on localhost). This problem is limited to Applets only - a POJO client is able to communicate with the exact same server without any problem. Exception in thread "AWT-EventQueue-1" java.security.AccessControlException: access denied (java.net .SocketPermission 127.0.0.1:9999 connect,resolve) at java.security.AccessControlContext.checkPermission(AccessControlContext.java:323) My applet.policy file's contents is: grant { permission java.security.AllPermission; }; My question is what are the other places where I need to modify my security settings to grant an Applet more security settings? Thank you. EDIT: Further investigation has lead me to find that this problem only occurs on some machines - but not others. So it could be a machine level (global) setting that is causing this, rather than a application-specific setting such as the one in the applet.policy file. EDIT: Another SO question: Socket connection to originating server of an unsigned Java applet This seems to describe the exact same problem, and Tom Hawtin - tackline 's answer provides the reason why (a security patch released that disallows applets from connecting to localhost). Bearing this in mind, how do I grant the applet the security settings such that in can indeed run on my machine. Also why does it run as-is on other machines but not mine?

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• Porting a select loop application to Android with NDK. Design question.

  - by plaisthos

  Hi, I have an network application which uses a select loop like this: bool shutdown=false; while (!shutdown) { [do something] select(...,timeout); } THe main loop cannot work like this in an Android application anymore since the application needs to receive Intents, need to handle GUI, etc. I think I have basically three possibilities: Move the main loop to the java part of the application. Let the loop run in its own thread and somehow communicate from/to java. Screw Android <= 2.3 and use a native activity and use AInputQueue/ALooper instead of select. The first possibility is not easy since java has no select which works on fds. Simply using the select and return after each loop to java is not an elegant possibility either since that requires setting the timeout to something like 20ms to have a good response time in the java part of the program. The second probability sound nicer but I have do some communication between java and the c++/c part of the program. Things that cold work: Using a socket, kind of ugly. using native calls in the "java gui thread" and callback from native in the "c thread". Both threads need to have thread safe implementations but this is managable. I have not explored the third possibility but I think that it is not the way to go. I think I can hack something together which will work but I asking what is the best path to chose.

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• KeepAlive packets over a Soap request

  - by Nycto

  I've been debugging some Soap requests we are making between two servers on the same VLAN. The app on one server is written in PHP, the app on the other is written in Java. I can control and make changes to the PHP code, but I can't affect the Java server. The PHP app forms the XML using the DOMDocument objects, then sends the request using the cURL extension. When the soap request took longer than 5 minutes to complete, it would always wait until the max timeout limit and exit with a message like this: Operation timed out after 900000 milliseconds with 0 bytes received After sniffing the packets that were being sent, it turns out that the problem was caused by a 5 minute timeout in the network that was closing what it thought was a stale connection. There were two ways to fix it: bump up the timeout in iptables, or start sending KeepAlive packets over the request. To be thorough, I would like to implement both solutions. Bumping up the timeout was easy for ops to do, but sending KeepAlive packets is turning out to be difficult. The cURL library itself supports this (see the --keepalive-time flag for the CLI app), but it doesn't appear that this has been implemented in the PHP cURL library. I even checked the source to make sure it wasn't an undocumented feature. So my question is this: How the heck can I get these packets sent? I see a few clear options, but I don't like any of them: Write a wrapper that will kick off the request by shell_execing the CLI app. This is a hack that I just don't like Update the cURL extension to support this. This is a non-option according to Ops. Open the socket myself. I know just enough to be dangerous. I also haven't seen a way to do this with fsockopen, but I could be missing something. Switch to another library. What exists that supports this? Thanks for any help you can offer.

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• SMTP on C: STARTTLS via OpenSSL

  - by Jackell

  Hi all! I am using openssl to build secure smtp connections to gmail.com:25. So I can successfully connect to the server and sends a command STARTTLS (I receive 220 2.0.0 Ready to start TLS). Then execute the following code without disconnecting: SSL_METHOD* method = NULL; SSL_library_init(); SSL_load_error_strings(); method = SSLv23_client_method(); ctx = SSL_CTX_new(method); if (ctx == NULL) { ERR_print_errors_fp(stderr); } SSL_CTX_set_options(ctx, SSL_OP_NO_SSLv2); ssl = SSL_new(ctx); if (!SSL_set_fd(ssl, socket)) { ERR_print_errors_fp(stderr); return; } if (ssl) { if (SSL_connect((SSL*)ssl) < 1) { ERR_print_errors_fp(stderr); } // then i think i need to send EHLO } But after calling SSL_connect I get an error: 24953:error:140770FC:SSL routines:SSL23_GET_SERVER_HELLO:unknown protocol:s23_clnt.c:601: If I use SSLv3_client_method I get an error: 18143:error:1408F10B:SSL routines:SSL3_GET_RECORD:wrong version number:s3_pkt.c:284. And If TLSv1_client_method: 21293:error:1408F10B:SSL routines:SSL3_GET_RECORD:wrong version number:s3_pkt.c:284: Why? What I do wrong?

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