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• latin1/unicode conversion problem with ajax request and special characters

  - by mfn

  Server is PHP5 and HTML charset is latin1 (iso-8859-1). With regular form POST requests, there's no problem with "special" characters like the em dash (–) for example. Although I don't know for sure, it works. Probably because there exists a representable character for the browser at char code 150 (which is what I see in PHP on the server for a literal em dash with ord). Now our application also provides some kind of preview mechanism via ajax: the text is sent to the server and a complete HTML for a preview is sent back. However, the ordinary char code 150 em dash character when sent via ajax (tested with GET and POST) mutates into something more: %E2%80%93. I see this already in the apache log. According to various sources I found, e.g. http://www.tachyonsoft.com/uc0020.htm , this is the UTF8 byte representation of em dash and my current knowledge is that JavaScript handles everything in Unicode. However within my app, I need everything in latin1. Simply said: just like a regular POST request would have given me that em dash as char code 150, I would need that for the translated UTF8 representation too. That's were I'm failing, because with PHP on the server when I try to decode it with either utf8_decode(...) or iconv('UTF-8', 'iso-8859-1', ...) but in both cases I get a regular ? representing this character (and iconv also throws me a notice: Detected an illegal character in input string ). My goal is to find an automated solution, but maybe I'm trying to be überclever in this case? I've found other people simply doing manual replacing with a predefined input/output set; but that would always give me the feeling I could loose characters. The observant reader will note that I'm behind on understanding the full impact/complexity with things about Unicode and conversion of chars and I definitely prefer to understand the thing as a whole then a simply manual mapping. thanks

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• Sending a JSON object to an ASP.NET web service using JQUERY ajax function

  - by uzay95

  I want to create object on the client side of aspx page. And i want to add functions to these javascript classes to make easier the life. Actually i can get and use the objects (derived from the server side classes) which returns from the services. When i wanted to send objects from the client by jquery ajax methods, i couldn't do it :) This is my javascript object: function ClassAndMark(_mark, _lesson){ this.Lesson = _lesson; this.Mark = _mark; } function Student(_name, _surname, _classAndMark){ this.Name = _name; this.SurName = _surname; this.ClassAndMark = _classAndMark; } JSClass.prototype.fSaveToDB(){ $.ajax({ type: "POST", contentType: "application/json; charset=utf-8", url: "/WS/SaveObject.asmx/fSaveToDB"), data: ????????????, dataType: "json" }); } Actually i don't know what should be definition of classes and methods on the Server side but i think: class ClassAndMark{ public string Lesson ; public string Mark ; } class Student{ public string Name ; public string SurName ; public ClassAndMark ClassAndMark ; } Web service is below but again i couldn't get what should be instead of the ???? : [WebMethod()] public void fSaveToDB(???? _obj) { // How can i convert input parameter/parameters // of method in the server side object? }

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• AJAX or a server side framework?

  - by Romansky

  I am working with a friend on building a web site, in general this web site will be a custom web app along with a very custom social network type of thing.. Currently I have a mock-up site that uses simple PHP with AJAX and JSON and JQUERY and I love how it works, I love the way it all fits together. But for a mock-up I did not implement any of the Social Network design patterns such as a login, rating, groups etc.. This brought me to a higher level of decision making requirement, I need to decide if I want to develop all this functionality by hand or use some kind of a framework. I spent this entire day researching, and it would seem that using Drupal and such frameworks will make the Social Network part easy (overlooking the customization requirement for now..) but will make client side Web App development less so. I found some other frameworks that are more developer friendly (customizable) such as Zend and Symfony etc.. but these seem to take allot of the power from the client and implement it in the server side, to me this seems a waste (and an unjustified performance bottleneck) .. Finally I found Aptana Jaxer framework that seems to think the same way I feel. That said it seems a bit under-developed, I didn't find modules for a social network and the community around it seems thin.. (searching Jaxer in StackOverflow returns few results) So other then making server side DB comm a bit simpler it does not help me greatly.. My requirements are a good facility to develop web apps on while containing all the user centric logic usually used for social networks in advance. What would you recommend? EDIT: OK, lats fine tune this question, after considering this abit further, is there a good down loadable source of a social network site in PHP that I can work around in building my web app? (I really like using JQUERY AJAX JSON etc..)

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• ajax call success function never called

  - by Shai

  The following code is a very simple ajax call to server that alerts back on success and complete events. From a reason I cannot understand on my development machine it works fins and alerts on success and complete but on server it never alerts on success. WHY ??? ** <html xmlns="http://www.w3.org/1999/xhtml"> <head runat="server"> <title></title> <script src="Scripts/jquery-1.7.1.min.js" type="text/javascript"></script> <script type="text/javascript"> function dummy() { $.ajax({ url: 'services/chatEngine.asmx/dummy', async: true, type: "POST", complete: function () { alert('Done'); }, success: function (a, b, c) { alert('Success'); } }); } </script> </head> <body> <form id="form1" runat="server"> <div> <ajaxToolkit:ToolkitScriptManager ID="ToolkitScriptManager1" runat="server"> </ajaxToolkit:ToolkitScriptManager> <div id="userList">Users:<br /></div> <input id="Button3" type="button" value="dummy" onclick="dummy()" /> </div> </form> </body> </html> ** The server side dummy function returns nothing, code follows - Public Function dummy() As String Return "" End Function

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• Firefox not honoring must-revalidate cache headers returned by jQuery.ajax() request

  - by Oliver Weichhold

  UPDATE 1: Judging by this thread I am not the only one having this problem in FF 12 and only in 12. UPDATE 2: The problem does not seem to be limited to Ajax requests. From the looks of it everything that makes it into Firefox 12's cache will be fetched from there. No matter what. The server can specify cache control headers all day long. Bummer! What I'm trying to achieve is the following behavior: Browser may cache the response without revalidating for up to 5 minutes I don't care if the browser revalidates on every request (Both Chrome and IE9 do for example) When the expiration is up the browser MUST revalidate (which in my case will result in fresh data) Chrome and IE9 exhibit the desired behavior when issuing a jquery.ajax() request with ifModified: true and cache: true while Firefox 12 never revalidates, which poses a serious problem. These are the actual response headers: HTTP/1.1 200 OK Server: nginx Date: Sun, 03 Jun 2012 07:13:43 GMT Content-Type: text/javascript; charset=UTF-8 Transfer-Encoding: chunked Connection: keep-alive Vary: Accept-Encoding Cache-Control: private, must-revalidate, max-age=300 Last-Modified: Sun, 03 Jun 2012 07:07:13 GMT Content-Encoding: gzip Any suggestions?

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• PHP, MySQL, Memcache / Ajax Scaling Problem

  - by Jeff Andersen

  I'm building a ajax tic tac toe game in PHP/MySQL. The premise of the game is to be able to share a url like mygame.com/123 with your friends and you play multiple simultaneous games. The way I have it set up is that a file (reload.php) is being called every 3 seconds while the user is viewing their game board space. This reload.php builds their game boards and the output (html) replaces their current game board (thus showing games in which it is their turn) Initially I built it entirely with PHP/MySQL and had zero caching. A friend gave me a suggestion to try doing all of the temporary/quick read information through memcache (storing moves, and ID matchups) and then building the game boards from this information. My issue is that, both solutions encounter a wall when there is roughly 30-40 active users with roughly 40-50 games running. It is running on a VPS from VPS.net with 2 nodes. (Dedicated CPU: 1.2GHz, RAM: 752MB) Each call to reload.php peforms 3 selects and 2 insert queries. The size of the data being pulled is negligible. The same actions happen on index.php to build the boards for the initial visit. Now that the backstory is done, my question is: Would there be a bottleneck in that each user is polling the same file every 3 seconds to rebuild their gameboards, and that all users are sitting on index.php from which the AJAX calls are made within the HTML. If so, is it possible to spread the users' calls out over a set of files designated to building the game boards (eg. reload1.php 2, 3 etc) and direct users to the appropriate file. Would this relieve the pressure? A long winded explanation; however, I didn't have anywhere else to ask. Thanks very much for any insight.

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• using jquery $.ajax to retrieve data and push data into javascript array through the success functio

  - by teamdane

  Hello All, I have a function that I'm trying to retrieve values using $.ajax and push the returned data into an array called output. Problem is the success function will not allow me to push the results into the array. see below for code. var getValues = function(el) { var value = ($(el).val()); if(value == '' || $(el).attr('disabled')) { return []; } var string = 'value=' + value; var output = []; $.ajax({ type: "GET", url: 'shocklookup_callback.php', dataType: "string", data: string, success: function(data) { } }); //output.push({ text : value + 'test', value : value + 'test1'} ); return output; }; Any ideas of what I can put in the success function to be able to push the data into the output array? Also I need to be able to return the output array to the original function getValues. If this doesn't' make a whole lot of sense please let me know and I'll try to explain better. Thanks, Dane

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• Is it possible to get multiple forms to work with one ajax post function

  - by Scarface

  Hey guys I have a system where there is one form for each friend you have and I used to have an ajax post function for each form, but I want to save code and was wondering if it was possible to get multiple forms to work with just one post function. If anyone has any advice on how to achieve this I would appreciate it. For example <div id="message"> <form id='submit' class='message-form' method='POST' > <input type='hidden' id='to' value='friend1' maxlength='255' > Subject<br><input type='text' id='subject' maxlength='50'><br> Message<br><textarea id='message2' cols='50' rows='15'></textarea> <input type='submit' id='submitmessage' class='responsebutton' value='Send'> </form> </div> $(document).ready(function(){ $(".message-form").submit(function() { $("#submitmessage").attr({ disabled:true, value:\"Sending...\" }); var to = $('#to').attr('value'); var subject = $('#subject').attr('value'); var message = $('#message2').attr('value'); $.ajax({ type: "POST", url: "messageprocess.php", data: 'to='+ to + '&subject=' + subject + '&message=' + message, success: function(response) { if(response == "OK") { $('.message-form').html("<div id='message'></div>"); $('#message').html("<h2>Email has been sent!</h2>") .append("<p>Please wait...</p>") .hide() .fadeIn(1500, function() { $('#message').append(\"<img id='checkmark' src='images/check.png' />\"); });

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• jCarousel jQuery ajax loading 1000 records

  - by user1714862

  I'm using jCarousel to present a vertical scolling list of +-1000 names. I am using ajax to load the data 100 records at a time then when all the data has loaded I just let the jCarousel loop in the DOM. I have the ajax and loop all working but would like to make the code work no matter how large the total record count becomes. 1) I'd like to eliminate the 1201 fixed number and use a variable. 2) I currently loop on every record I see (carousel.first) to see if it matches my reload position(s) (albeit the loop is ony 12x it still seems a little "loopy") Any suggestions on improving this? function mycarousel_itemLoadCallback(carousel, state) { //if (carousel.has(carousel.first, carousel.last)) { //return; //} var getCount = 100; // Number of records to grab at a time var maxCount = 1201; // total possible number of records var visible = 9; // the number of records you can see in the window so this creates a pre-load by this number of records for (var i = 1; i < maxCount; i+=getCount ) { if (carousel.first === 1 || carousel.first === (i-visible)){ var getFrom = i; var getTo = getFrom+(getCount-1); //alert('TOP Record ='+carousel.first+'\n Now GET '+getFrom+'-'+getTo); jQuery.get('#ajaxscript#', { first: getFrom, last: getTo }, function(xml) { mycarousel_itemAddCallback(carousel, getFrom, getTo, xml); }, 'xml' ); break; } } };

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• Pass Element value to $ajax->link in cakephp

  - by TwoThumbs

  I need to pass the value of an element to an $ajax-link without using a form/submit structure. (because I have a dynamically set number of clickable links through which I am triggering the action) I used to do this in Ruby using the Prototype javascript function $F like this: <%= link_to_remote "#{item.to_s}", :url => { :action => :add_mpc }, :with => "'category=' + $F('mpc_category')" -%> But this does not seem to work in Cakephp: <?php echo $ajax->link(substr($vehicle['vehicles']['year'], -2), array('action' => 'add_mpc', 'category' => '$F("mpc_category")'), array('update' => 'results', 'position' => 'top')); ?> PHP sees $F as a variable instead of a call to javascript. I'm not too familiar with Javascript, but is there another way to pass the value of the 'mpc_category' input element to the controller through this link? I have been looking for a couple days and can't find anyone dealing with this specific issue. Thanks for any assistance. Edit: fixed syntax in php statement.

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• use jquery inside data returnd by ajax using " innerHtml"

  - by me.again

  hi , I want to use jquery inside data returnd by ajax using " innerHtml" .. look here , <a href=\"#\" onclick=\"$.post('". $url ."', {'t' : 't'}, function(data){ $('content_rows').attr('innerHTML',data);}); " . $this->js_rebind .";return false;\">" $text .'</a>'; this link makes moving between the pages by ajax "by reloading the div that contains the data" , without - of course - reloading whole page . like this : <div id="content_rows"> rows from mysql database </div> now everything is Ok , but , I use " detailsRow Plugin " like this : <script type="text/javascript"> $(document).ready(function() { $('#rows').detailsRow('admin/blog/detailsRow',{ data:{"id":"id"} , dataType: "script" }); }); </script> this plugin makes every TR/Row in the table get more details by click (+-) .. go there : http://webworkflow.co.uk/plugins/detailsRow/ now this plugin works fine in the frist page ( before reload the div by jquery ) but after reloading the div and in the other pages or also when I go back to the frsit page it dos`nt work .. I put the code inside content_rows div like this : <div id="content_rows"> <script type="text/javascript"> $(document).ready(function() { $('#rows').detailsRow('admin/blog/detailsRow',{ data:{"id":"id"} , dataType: "script" }); }); </script> </div> but also doesnt work .. sorry I`m beginner in jQuery .. thanks ..

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• SSL Ajax type of certificate for the static domain (image + js)

  - by Alexl

  Hi, I have a page that is SSL and has a valid certificate extended. (mainpage.com) But this page request some static content to another domain(page-static.com), basicly images and js. Actually i have only a certificate for my mainpage.com. So now when i request this page i get invalid ssl page because it contains invalid encrypted data (the one provided by the www.page-static.com) What kind of certificate do i need for the www.page-static.com. Do i need the same one as the mainpage.com, because this certificate are expensive (it's a extended certificate). Or a cheap certificate from godaddy will do the trick. This is another question do both certificates have to be signed by the same root provider and/or the same encryption key length (or it can be only 128 bits)? Thanks for your help

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• How to set ActiveModel::Base.include_root_in_json to false?

  - by Mark L

  I'm using Rails 3 w/ Mongoid, (so no ActiveRecord). Mongoid uses ActiveModel's "to_json" method, and by default that method includes the root object in the JSON (which I don't want). I've tried putting this in an initializer: ActiveModel::Base.include_root_in_json = false But get the error uninitialized constant ActiveModel::Base Any ideas how I can change this? I changed the default directly in the source-code and it worked fine, but obviously I'd like to do it properly. The variable is defined at the top of this file: Github - activemodel/lib/active_model/serializers/json.rb From the docs: "The option ActiveModel::Base.include_root_in_json controls the top-level behavior of to_json. It is true by default."

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• Putting data from local SQL database to remote SQL database without remote SQL access enabled (PHP)

  - by Shyam

  Hi, I have a local database, and all the tables are defined. Eventually I need to publish my data remotely, which I can do easily with PHPmyadmin. Problem however is that my remote host doesn't allow remote SQL connections at all, so writing a script that does a mysqldump and run it through a client (which would've been ideal) won't help me here. Since the schema won't change, but the data will, I need some kind of PHP client that works "reverse". My question is if such a client exists and what would be recommended to use (by experience). I just need an one way trip here, from my local database (Rails) to the remote database (supports PHP), preferable as simple and slick as possible. Thank you for your replies, comments and feedback!

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• OAuth::Problem (parameter_absent)

  - by Sid

  Im working with OAuth 0.3.6 and the linkedin gem for a Rails application and I have this issue where OAuth throws an error saying that OAuth::Problem (parameter_absent). The thing is it doesn't throw the error on every occasion its called and the problem is I am unable to reproduce the issue locally to test it. The documentation says that : [parameter_absent: a required parameter wasn't received. In this case, the response SHOULD also contain an oauth_parameters_absent parameter. ] but the request is generated the same way each time to obtain the tokens so I fail to understand why this happens. Log OAuth::Problem (parameter_absent): oauth (0.3.6) lib/oauth/consumer.rb:167:in `request' oauth (0.3.6) lib/oauth/consumer.rb:183:in `token_request' oauth (0.3.6) lib/oauth/tokens/request_token.rb:18:in `get_access_token' linkedin (0.1.7) lib/linked_in/client.rb:35:in `authorize_from_request' app/controllers/users_controller.rb:413:in `linkedin_save' I have seen a few people facing this issue but I am yet to figure out a way to resolve this. Would appreciate some help on this.

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• ruby1.9.1 - sqlite3 problem on ubuntu 9.10 x64 (no such file to load -- sqlite3)

  - by doriath

  Hi, I have problem with sqlite3, because it is not working. irb(main):001:0> require 'sqlite3' LoadError: no such file to load -- sqlite3 from (irb):1:in `require' from (irb):1 from /usr/bin/irb:12:in `<main>' I have installed following packages: sudo apt-get install ruby1.9.1-full sudo apt-get install rubygems1.9.1 sudo gem update --system sudo apt-get install sqlite3 libsqlite3-dev sudo gem install sqlite3-ruby sudo apt-get install libopenssl-ruby1.9.1 The applications has following versions: $ ruby --version ruby 1.9.1p243 (2009-07-16 revision 24175) [x86_64-linux] $ sqlite3 --version 3.6.16 $ gem --version 1.3.6 and $ gem list --local *** LOCAL GEMS *** actionmailer (2.3.5) actionpack (2.3.5) activerecord (2.3.5) activeresource (2.3.5) activesupport (2.3.5) ffi (0.6.2) rack (1.0.1) rails (2.3.5) rake (0.8.7) rubygems-update (1.3.6) sqlite3-ruby (1.2.5) What have I missed?

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• PostgreSQL / Ruby for commercial application

  - by RPK

  I am planning a web-based commercial application with front-end RoR and back-end PostgreSQL. I've some confusion about RoR and PostgreSQL Edition to use. For RoR, I have Aptana RADRails installed. For PostgreSQL, a free variant is also available at EnterpriseDB. Previously I installed a free EnterpriseDB PostgreSQL variant and it was very smooth and had professional touch. It was quite different from the one available from PostgreSQL website. I want to know which IDE and RoR variant to use for my project. I have no idea of Ruby and Rails. I will be learning and developing simultaneously. Also, which PostgreSQL variant to use? Can these two technologies be used for a developing a commercial application?

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• How do I fix this error? config.gem: Unpacked gem authlogic-2.1.3 in vendor/gems has no specificatio

  - by Ganesh Shankar

  I get this error when launching my Mongrel server... $ script/server --debugger => Booting Mongrel => Rails 2.3.5 application starting on http://0.0.0.0:3000 config.gem: Unpacked gem authlogic-2.1.3 in vendor/gems has no specification file. Run 'rake gems:refresh_specs' to fix this. => Debugger enabled => Call with -d to detach => Ctrl-C to shutdown server When I run rake gems:refresh_specs like it suggests I get another error though: rake aborted! undefined method `installed_source_index' for #<Gem::SourceIndex:0x100551a58> Any thoughts on how to fix this?

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• access following entry in a form_for, and switch a value between two entry of my DB

  - by Sylario

  I am displaying a list of articles. I sort my articles by the param order, and i want, when displaying the list of article to be able to "move" them up or down. In php i do everything with a for browsing my array of results and inside the for i go to the next index to find where i am in the list, and with wich other article i must swap my order. I can do that in the script displaying the edit page and then in the script executing the update. In rails i have only my form_for in my erb. How can i : Know if my entry is the last one or the first one(display only V for the first, ^ for the last and V^ for the rest) Update my DB entry by switching the order value between the article that i want to lower, raise, and the one he is taking the place.

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• Share on Facebook, Retweet, etc, buttons in straight Ruby gem?

  - by Alexandre

  Notice those buttons atop http://techcrunch.com/2010/04/04/he-even-makes-coldplay-sound-fun/ for sharing the url on social networks? I want to do something very very similar for a site I'm building. ShareThis offers a widget that does the same thing but it's branded and external. I'm looking for a pure Ruby solution. A gem containing a module that could be included in a Rails ApplicationHelper class would be perfect. Suggestions appreciated before I go reinventing the wheel!

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• Redirect folder to different server

  - by yuval

  I know you can redirect subdomains to a different server, but can you do the same with folders? Say I have example.com. I can redirect mysubdomain.example.com to a different server, but can I redirect example.com/mysubdomain to a different server? I'd like to host a rails app in that folder on a site that runs php while still maintaining good search engines ratings (by not creating a sub domain which in my experience in recognized as a different site). Any help? Thanks!

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• Customizing Number of Page Links Rendered With will_paginate?

  - by Moe

  I'm using the will_paginate gem for my Rails project and it's working beautifully. Unfortunately, on paginated result sets with a larger number of pages, the link section is too wide. Instead of: « Previous 1 2 … 5 6 7 8 9 10 11 12 13 … 18 19 Next » I would like to show: « Previous 1 2 … 5 6 7 8 9 … 18 19 Next » How can I reduce the number of page links being rendered? I looked at the will_paginate docs on github but couldn't find a solution. Thanks! Moe

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• Problem with rake db:migrate

  - by Shreyas Satish

  When I try rake db:migrate, I get the following error: !!! The bundled mysql.rb driver has been removed from Rails 2.2. Please install the mysql gem and try again: gem install mysql. rake aborted! no such file to load -- mysql And when I try to "gem install mysql" Building native extensions. This could take a while... ERROR: Error installing mysql: ERROR: Failed to build gem native extension. /usr/bin/ruby extconf.rb Can't find header files for ruby. Gem files will remain installed in /usr/lib/ruby/gems/1.8/gems/mysql-2.8.1 for inspection. I checked the rubygems folder and mysql gem has been installed. Any ideas? Cheers

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• Why do users have to enter a 7-digit twitter PIN to grant my application access?

  - by Tony

  I am implementing some ruby on rails code tweet stuff for my users. I am creating the proper oauth link...something like http://twitter.com/oauth/authorize?oauth_token=y2RkuftYAEkbEuIF7zKMuzWN30O2XxM8U9j0egtzKv But after my test account grants access to twitter, it pulls up a page saying "You've successfully granted access to . Simply return to and enter the following PIN to complete the process. 1234567" I have no idea where the user should enter this PIN and why they have to do that. I don't think this should be a necessary step. Twitter should be redirecting the user to the callback URL I provided in the application settings. Does anyone know why this is happening? UPDATE I found this article that states I need to send my users to this URL (note "authenticate" instead of "authorize"): http://twitter.com/oauth/authenticate?oauth_token=y2RkuftYAEkbEuIF7zKMuzWN30O2XxM8U9j0egtzKv I made the change but Twitter redirects the user to the authorize path after he clicks "Allow" which then gives him the 7 digit PIN again!

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• Mongomapper - bootstrapping techniques

  - by egarcia

  I've just begun creating a rails application using mongomapper for my models. I'm wondering what solution should I use for bootstrapping my app with it. All my previous experience is with ActiveRecord & PostgreSQL, in which I have used several gems for bootstrapping. The one I liked the most was bootstrapper (+ factorygirl + faker). Does anyone know whether these work ok with mongomapper? Can anyone suggest better alternatives? Is there anything obvious I need to know when bootstrapping mongodb?

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