GzipModule.cs :  » Content-Management-Systems-CMS » umbraco » umbraco » editorControls » tinyMCE3 » webcontrol » plugin » C# / CSharp Open Source

/*
 * $Id: GzipModule.cs 439 2007-11-26 13:26:10Z spocke $
 *
 * @author Moxiecode
 * @copyright Copyright  2004-2007, Moxiecode Systems AB, All rights reserved.
 */

using System;
using System.Web;
using System.Text.RegularExpressions;
using System.IO;

namespace umbraco.editorControls.tinyMCE3.webcontrol.plugin{
    /// <summary>
  /// Description of HttpHandler.
  /// </summary>
  public class GzipModule : IModule {
    /// <summary></summary>
    /// <param name="context">Request context.</param>
    public void ProcessRequest(HttpContext context) {
      HttpRequest request = context.Request;
      HttpResponse response = context.Response;
      HttpServerUtility server = context.Server;
      GzipCompressor gzipCompressor = new GzipCompressor();
      ConfigSection configSection = (ConfigSection) System.Web.HttpContext.Current.GetSection("TinyMCE");
      string suffix = "", enc;
      string[] languages = request.QueryString["languages"].Split(',');
      bool supportsGzip;

      // Set response headers
      response.ContentType = "text/javascript";
      response.Charset = "UTF-8";
      response.Buffer = false;

            // UMBRACO: Populate the configsection if it's empty
            if (configSection == null)
            {
                configSection = new ConfigSection();
                configSection.GzipEnabled = true;
                configSection.InstallPath = umbraco.editorControls.tinymce.tinyMCEConfiguration.JavascriptPath;
                configSection.GzipExpiresOffset = TimeSpan.FromDays(10).Ticks;
            }

      // Setup cache
      response.Cache.SetExpires(DateTime.Now.AddTicks(configSection.GzipExpiresOffset));
      response.Cache.SetCacheability(HttpCacheability.Public);
      response.Cache.SetValidUntilExpires(false);

      // Check if it supports gzip
      enc = Regex.Replace("" + request.Headers["Accept-Encoding"], @"\s+", "").ToLower();
      supportsGzip = enc.IndexOf("gzip") != -1 || request.Headers["---------------"] != null;
      enc = enc.IndexOf("x-gzip") != -1 ? "x-gzip" : "gzip";

      // Handle mode/suffix
      if (configSection.Mode != null)
        suffix = "_" + configSection.Mode;

      gzipCompressor.AddData("var tinyMCEPreInit = {base : '" + new Uri(request.Url, configSection.InstallPath).ToString() + "', suffix : '" + suffix + "'};");

      // Add core
      gzipCompressor.AddFile(server.MapPath(configSection.InstallPath + "/tiny_mce" + suffix + ".js"));

      // Add core languages
      foreach (string lang in languages)
        gzipCompressor.AddFile(server.MapPath(configSection.InstallPath + "/langs/" + lang + ".js"));

      // Add themes
      if (request.QueryString["themes"] != null) {
        foreach (string theme in request.QueryString["themes"].Split(',')) {
          gzipCompressor.AddFile(server.MapPath(configSection.InstallPath + "/themes/" + theme + "/editor_template" + suffix + ".js"));

          // Add theme languages
          foreach (string lang in languages) {
            string path = server.MapPath(configSection.InstallPath + "/themes/" + theme + "/langs/" + lang + ".js");

            if (File.Exists(path))
              gzipCompressor.AddFile(path);
          }

          gzipCompressor.AddData("tinymce.ThemeManager.urls['" + theme + "'] = tinymce.baseURL+'/themes/" + theme + "';");
        }
      }

      // Add plugins
      if (request.QueryString["plugins"] != null) {
        foreach (string plugin in request.QueryString["plugins"].Split(',')) {
          gzipCompressor.AddFile(server.MapPath(configSection.InstallPath + "/plugins/" + plugin + "/editor_plugin" + suffix + ".js"));

          // Add plugin languages
          foreach (string lang in languages) {
            string path = server.MapPath(configSection.InstallPath + "/plugins/" + plugin + "/langs/" + lang + ".js");

            if (File.Exists(path))
              gzipCompressor.AddFile(path);
          }

          gzipCompressor.AddData("tinymce.ThemeManager.urls['" + plugin + "'] = tinymce.baseURL+'/plugins/" + plugin + "';");
        }
      }

      // Output compressed file
      gzipCompressor.NoCompression = !supportsGzip || configSection.GzipNoCompression;
      if (!gzipCompressor.NoCompression)
        response.AppendHeader("Content-Encoding", enc);

      gzipCompressor.DiskCache = configSection.GzipDiskCache;
      gzipCompressor.CachePath = configSection.GzipCachePath;

      gzipCompressor.Compress(response.OutputStream);
    }
  }
}