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POHTTP handlers and javascript bundling in VS 2012
 

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    <p>I am currently trying to setup a project to implement localization on javascript files (as described <a href="http://madskristensen.net/post/Localize-text-in-JavaScript-files-in-ASPNET.aspx" rel="nofollow">here</a>) but at the same time I'd like to bundle and minify the javascript in the project. I followed a tutorial on bundling and minification <a href="http://msdn.microsoft.com/en-us/vs11trainingcourse_aspnetandvisualstudio_topic5#_Toc319053054" rel="nofollow">here</a></p> <p>I have been able to get both working separately, but when I try to get them working together I cannot get the localisation working properly. I think this is because bundling creates it's own route handling for the bundled/minified javascript it generates, so the httpHandler I have defined in the webconfig gets ignored. I keep getting javascript errors saying "CustomTranslate is not defined".</p> <p>I am trying to do this because we are building a number of controls using ExtJS, but we need to be able to apply localisation to those controls. Any help/ideas on how I can get them to work together would be appreciated.</p> <p>I am <strong>not</strong> using MVC, but doing this in asp.net in Visual Studio 2012.</p> <p>Here is my code:</p> <p>BundleConfig.cs</p> <pre><code>namespace TranslationTest { public class BundleConfig { public static void RegisterBundles(BundleCollection bundles) { //default bundles addeed here... bundles.Add(new ScriptBundle("~/bundles/ExtJS.axd").Include("~/Scripts/ExtJS/ext-all.js", "~/Scripts/ExtJS/TestForm.js")); } } } </code></pre> <p>web.config: </p> <pre><code>&lt;globalization uiCulture="auto" /&gt; &lt;httpHandlers&gt; &lt;add verb="*" path="/bundles/ExtJS.axd" type="TranslationTest.ScriptTranslator, TranslationTest" /&gt; &lt;/httpHandlers&gt; </code></pre> <p>Default.aspx</p> <pre><code>&lt;%@ Page Title="Home Page" Language="C#" MasterPageFile="~/Site.Master" AutoEventWireup="true" CodeBehind="Default.aspx.cs" Inherits="TranslationTest._Default" %&gt; &lt;asp:Content runat="server" ID="BodyContent" ContentPlaceHolderID="MainContent"&gt; &lt;script src="/bundles/ExtJS.axd"&gt;&lt;/script&gt; &lt;/asp:Content&gt; </code></pre> <p>TestForm.js: </p> <pre><code>Ext.require([ 'Ext.form.*', 'Ext.layout.container.Column', 'Ext.tab.Panel' ]); Ext.onReady(function () { Ext.QuickTips.init(); var bd = Ext.getBody(); bd.createChild({ tag: 'h2', html: 'Form 1' }); var simple = Ext.create('Ext.form.Panel', { url: 'save-form.php', frame: true, title: 'Simple Form', bodyStyle: 'padding:5px 5px 0', width: 350, fieldDefaults: { msgTarget: 'side', labelWidth: 75 }, defaultType: 'textfield', defaults: { anchor: '100%' }, items: [{ fieldLabel: CustomTranslate(FirstName), name: 'first', allowBlank: false }, { fieldLabel: CustomTranslate(LastName), name: 'last' }, { fieldLabel: CustomTranslate(Company), name: 'company' }, { fieldLabel: CustomTranslate(Email), name: 'email', vtype: 'email' }, { xtype: 'timefield', fieldLabel: CustomTranslate(Time), name: 'time', minValue: '8:00am', maxValue: '6:00pm' }], buttons: [{ text: CustomTranslate(Save) }, { text: CustomTranslate(Cancel) }] }); simple.render(document.body); }); </code></pre> <p>Currently the FirstName, LastName, etc are all stored in resource files, as in the linked example above.</p> <p>ScriptTranslator.cs</p> <pre><code>namespace TranslationTest { public class ScriptTranslator : IHttpHandler { #region IHttpHandler Members public bool IsReusable { get { return false; } } public void ProcessRequest(HttpContext context) { string relativePath = context.Request.AppRelativeCurrentExecutionFilePath.Replace(".axd", string.Empty); string absolutePath = context.Server.MapPath(relativePath); string script = ReadFile(absolutePath); string translated = TranslateScript(script); context.Response.Write(translated); Compress(context); SetHeadersAndCache(absolutePath, context); } #endregion private void SetHeadersAndCache(string file, HttpContext context) { context.Response.AddFileDependency(file); context.Response.Cache.VaryByHeaders["Accept-Language"] = true; context.Response.Cache.VaryByHeaders["Accept-Encoding"] = true; context.Response.Cache.SetLastModifiedFromFileDependencies(); context.Response.Cache.SetExpires(DateTime.Now.AddDays(7)); context.Response.Cache.SetValidUntilExpires(true); context.Response.Cache.SetCacheability(HttpCacheability.Public); } #region Localization private static Regex REGEX = new Regex(@"CustomTranslate\(([^\))]*)\)", RegexOptions.Singleline | RegexOptions.Compiled); private string TranslateScript(string text) { MatchCollection matches = REGEX.Matches(text); ResourceManager manager = new ResourceManager(typeof(TranslationTest.App_GlobalResources.text)); foreach (Match match in matches) { object obj = manager.GetObject(match.Groups[1].Value); if (obj != null) { text = text.Replace(match.Value, CleanText(obj.ToString())); } } return text; } private static string CleanText(string text) { text = text.Replace("'", "\\'"); text = text.Replace("\\", "\\\\"); return text; } private static string ReadFile(string absolutePath) { if (File.Exists(absolutePath)) { using (StreamReader reader = new StreamReader(absolutePath)) { return reader.ReadToEnd(); } } return null; } #endregion #region Compression private const string GZIP = "gzip"; private const string DEFLATE = "deflate"; private static void Compress(HttpContext context) { if (IsEncodingAccepted(DEFLATE, context)) { context.Response.Filter = new DeflateStream(context.Response.Filter, CompressionMode.Compress); SetEncoding(DEFLATE, context); } else if (IsEncodingAccepted(GZIP, context)) { context.Response.Filter = new GZipStream(context.Response.Filter, CompressionMode.Compress); SetEncoding(GZIP, context); } } private static bool IsEncodingAccepted(string encoding, HttpContext context) { return context.Request.Headers["Accept-encoding"] != null &amp;&amp; context.Request.Headers["Accept-encoding"].Contains(encoding); } private static void SetEncoding(string encoding, HttpContext context) { context.Response.AppendHeader("Content-encoding", encoding); } #endregion } } </code></pre> <p>global.asax.cs</p> <pre><code>namespace TranslationTest { public class Global : HttpApplication { void Application_Start(object sender, EventArgs e) { Microsoft.Web.Optimization.BundleTable.Bundles.EnableDefaultBundles(); BundleConfig.RegisterBundles(System.Web.Optimization.BundleTable.Bundles); AuthConfig.RegisterOpenAuth(); } } } </code></pre> <p>I hope I've covered everything, but please let me know if there's anything missing. Thanks in advance!!</p>
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    1. COBtw, it's probably also worth mentioning that I also tried making my script translator implement IRouteHandler too, but didn't have much luck going down that road either.
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