Add m-esr52 at 52.6.0

1 files changed, 568 insertions, 0 deletions

diff --git a/browser/components/feeds/FeedConverter.js b/browser/components/feeds/FeedConverter.js
new file mode 100644
index 000000000..aa70620d4
--- /dev/null
+++ b/browser/components/feeds/FeedConverter.js
@@ -0,0 +1,568 @@
+/* -*- indent-tabs-mode: nil; js-indent-level: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+Components.utils.import("resource://gre/modules/XPCOMUtils.jsm");
+Components.utils.import("resource://gre/modules/debug.js");
+Components.utils.import("resource://gre/modules/Services.jsm");
+
+const Cc = Components.classes;
+const Ci = Components.interfaces;
+const Cr = Components.results;
+
+function LOG(str) {
+  dump("*** " + str + "\n");
+}
+
+const FS_CONTRACTID = "@mozilla.org/browser/feeds/result-service;1";
+const FPH_CONTRACTID = "@mozilla.org/network/protocol;1?name=feed";
+const PCPH_CONTRACTID = "@mozilla.org/network/protocol;1?name=pcast";
+
+const TYPE_MAYBE_FEED = "application/vnd.mozilla.maybe.feed";
+const TYPE_MAYBE_VIDEO_FEED = "application/vnd.mozilla.maybe.video.feed";
+const TYPE_MAYBE_AUDIO_FEED = "application/vnd.mozilla.maybe.audio.feed";
+const TYPE_ANY = "*/*";
+
+const PREF_SELECTED_APP = "browser.feeds.handlers.application";
+const PREF_SELECTED_WEB = "browser.feeds.handlers.webservice";
+const PREF_SELECTED_ACTION = "browser.feeds.handler";
+const PREF_SELECTED_READER = "browser.feeds.handler.default";
+
+const PREF_VIDEO_SELECTED_APP = "browser.videoFeeds.handlers.application";
+const PREF_VIDEO_SELECTED_WEB = "browser.videoFeeds.handlers.webservice";
+const PREF_VIDEO_SELECTED_ACTION = "browser.videoFeeds.handler";
+const PREF_VIDEO_SELECTED_READER = "browser.videoFeeds.handler.default";
+
+const PREF_AUDIO_SELECTED_APP = "browser.audioFeeds.handlers.application";
+const PREF_AUDIO_SELECTED_WEB = "browser.audioFeeds.handlers.webservice";
+const PREF_AUDIO_SELECTED_ACTION = "browser.audioFeeds.handler";
+const PREF_AUDIO_SELECTED_READER = "browser.audioFeeds.handler.default";
+
+function getPrefAppForType(t) {
+  switch (t) {
+    case Ci.nsIFeed.TYPE_VIDEO:
+      return PREF_VIDEO_SELECTED_APP;
+
+    case Ci.nsIFeed.TYPE_AUDIO:
+      return PREF_AUDIO_SELECTED_APP;
+
+    default:
+      return PREF_SELECTED_APP;
+  }
+}
+
+function getPrefWebForType(t) {
+  switch (t) {
+    case Ci.nsIFeed.TYPE_VIDEO:
+      return PREF_VIDEO_SELECTED_WEB;
+
+    case Ci.nsIFeed.TYPE_AUDIO:
+      return PREF_AUDIO_SELECTED_WEB;
+
+    default:
+      return PREF_SELECTED_WEB;
+  }
+}
+
+function getPrefActionForType(t) {
+  switch (t) {
+    case Ci.nsIFeed.TYPE_VIDEO:
+      return PREF_VIDEO_SELECTED_ACTION;
+
+    case Ci.nsIFeed.TYPE_AUDIO:
+      return PREF_AUDIO_SELECTED_ACTION;
+
+    default:
+      return PREF_SELECTED_ACTION;
+  }
+}
+
+function getPrefReaderForType(t) {
+  switch (t) {
+    case Ci.nsIFeed.TYPE_VIDEO:
+      return PREF_VIDEO_SELECTED_READER;
+
+    case Ci.nsIFeed.TYPE_AUDIO:
+      return PREF_AUDIO_SELECTED_READER;
+
+    default:
+      return PREF_SELECTED_READER;
+  }
+}
+
+function safeGetCharPref(pref, defaultValue) {
+  var prefs =
+      Cc["@mozilla.org/preferences-service;1"].
+      getService(Ci.nsIPrefBranch);
+  try {
+    return prefs.getCharPref(pref);
+  }
+  catch (e) {
+  }
+  return defaultValue;
+}
+
+function FeedConverter() {
+}
+FeedConverter.prototype = {
+  classID: Components.ID("{229fa115-9412-4d32-baf3-2fc407f76fb1}"),
+
+  /**
+   * This is the downloaded text data for the feed.
+   */
+  _data: null,
+
+  /**
+   * This is the object listening to the conversion, which is ultimately the
+   * docshell for the load.
+   */
+  _listener: null,
+
+  /**
+   * Records if the feed was sniffed
+   */
+  _sniffed: false,
+
+  /**
+   * See nsIStreamConverter.idl
+   */
+  convert(sourceStream, sourceType, destinationType,
+          context) {
+    throw Cr.NS_ERROR_NOT_IMPLEMENTED;
+  },
+
+  /**
+   * See nsIStreamConverter.idl
+   */
+  asyncConvertData(sourceType, destinationType,
+                   listener, context) {
+    this._listener = listener;
+  },
+
+  /**
+   * Whether or not the preview page is being forced.
+   */
+  _forcePreviewPage: false,
+
+  /**
+   * Release our references to various things once we're done using them.
+   */
+  _releaseHandles() {
+    this._listener = null;
+    this._request = null;
+    this._processor = null;
+  },
+
+  /**
+   * See nsIFeedResultListener.idl
+   */
+  handleResult(result) {
+    // Feeds come in various content types, which our feed sniffer coerces to
+    // the maybe.feed type. However, feeds are used as a transport for
+    // different data types, e.g. news/blogs (traditional feed), video/audio
+    // (podcasts) and photos (photocasts, photostreams). Each of these is
+    // different in that there's a different class of application suitable for
+    // handling feeds of that type, but without a content-type differentiation
+    // it is difficult for us to disambiguate.
+    //
+    // The other problem is that if the user specifies an auto-action handler
+    // for one feed application, the fact that the content type is shared means
+    // that all other applications will auto-load with that handler too,
+    // regardless of the content-type.
+    //
+    // This means that content-type alone is not enough to determine whether
+    // or not a feed should be auto-handled. This means that for feeds we need
+    // to always use this stream converter, even when an auto-action is
+    // specified, not the basic one provided by WebContentConverter. This
+    // converter needs to consume all of the data and parse it, and based on
+    // that determination make a judgment about type.
+    //
+    // Since there are no content types for this content, and I'm not going to
+    // invent any, the upshot is that while a user can set an auto-handler for
+    // generic feed content, the system will prevent them from setting an auto-
+    // handler for other stream types. In those cases, the user will always see
+    // the preview page and have to select a handler. We can guess and show
+    // a client handler, but will not be able to show web handlers for those
+    // types.
+    //
+    // If this is just a feed, not some kind of specialized application, then
+    // auto-handlers can be set and we should obey them.
+    try {
+      let feedService =
+          Cc["@mozilla.org/browser/feeds/result-service;1"].
+          getService(Ci.nsIFeedResultService);
+      if (!this._forcePreviewPage && result.doc) {
+        let feed = result.doc.QueryInterface(Ci.nsIFeed);
+        let handler = safeGetCharPref(getPrefActionForType(feed.type), "ask");
+
+        if (handler != "ask") {
+          if (handler == "reader")
+            handler = safeGetCharPref(getPrefReaderForType(feed.type), "bookmarks");
+          switch (handler) {
+            case "web":
+              let wccr =
+                  Cc["@mozilla.org/embeddor.implemented/web-content-handler-registrar;1"].
+                  getService(Ci.nsIWebContentConverterService);
+              if ((feed.type == Ci.nsIFeed.TYPE_FEED &&
+                   wccr.getAutoHandler(TYPE_MAYBE_FEED)) ||
+                  (feed.type == Ci.nsIFeed.TYPE_VIDEO &&
+                   wccr.getAutoHandler(TYPE_MAYBE_VIDEO_FEED)) ||
+                  (feed.type == Ci.nsIFeed.TYPE_AUDIO &&
+                   wccr.getAutoHandler(TYPE_MAYBE_AUDIO_FEED))) {
+                wccr.loadPreferredHandler(this._request);
+                return;
+              }
+              break;
+
+            default:
+              LOG("unexpected handler: " + handler);
+              // fall through -- let feed service handle error
+            case "bookmarks":
+            case "client":
+            case "default":
+              try {
+                let title = feed.title ? feed.title.plainText() : "";
+                let desc = feed.subtitle ? feed.subtitle.plainText() : "";
+                feedService.addToClientReader(result.uri.spec, title, desc, feed.type, handler);
+                return;
+              } catch (ex) { /* fallback to preview mode */ }
+          }
+        }
+      }
+
+      let ios =
+          Cc["@mozilla.org/network/io-service;1"].
+          getService(Ci.nsIIOService);
+      let chromeChannel;
+
+      // handling a redirect, hence forwarding the loadInfo from the old channel
+      // to the newchannel.
+      let oldChannel = this._request.QueryInterface(Ci.nsIChannel);
+      let loadInfo = oldChannel.loadInfo;
+
+      // If there was no automatic handler, or this was a podcast,
+      // photostream or some other kind of application, show the preview page
+      // if the parser returned a document.
+      if (result.doc) {
+
+        // Store the result in the result service so that the display
+        // page can access it.
+        feedService.addFeedResult(result);
+
+        // Now load the actual XUL document.
+        let aboutFeedsURI = ios.newURI("about:feeds", null, null);
+        chromeChannel = ios.newChannelFromURIWithLoadInfo(aboutFeedsURI, loadInfo);
+        chromeChannel.originalURI = result.uri;
+
+        // carry the origin attributes from the channel that loaded the feed.
+        chromeChannel.owner =
+          Services.scriptSecurityManager.createCodebasePrincipal(aboutFeedsURI,
+                                                                 loadInfo.originAttributes);
+      } else {
+        chromeChannel = ios.newChannelFromURIWithLoadInfo(result.uri, loadInfo);
+      }
+
+      chromeChannel.loadGroup = this._request.loadGroup;
+      chromeChannel.asyncOpen(this._listener, null);
+    }
+    finally {
+      this._releaseHandles();
+    }
+  },
+
+  /**
+   * See nsIStreamListener.idl
+   */
+  onDataAvailable(request, context, inputStream,
+                  sourceOffset, count) {
+    if (this._processor)
+      this._processor.onDataAvailable(request, context, inputStream,
+                                      sourceOffset, count);
+  },
+
+  /**
+   * See nsIRequestObserver.idl
+   */
+  onStartRequest(request, context) {
+    let channel = request.QueryInterface(Ci.nsIChannel);
+
+    // Check for a header that tells us there was no sniffing
+    // The value doesn't matter.
+    try {
+      let httpChannel = channel.QueryInterface(Ci.nsIHttpChannel);
+      // Make sure to check requestSucceeded before the potentially-throwing
+      // getResponseHeader.
+      if (!httpChannel.requestSucceeded) {
+        // Just give up, but don't forget to cancel the channel first!
+        request.cancel(Cr.NS_BINDING_ABORTED);
+        return;
+      }
+
+      // Note: this throws if the header is not set.
+      httpChannel.getResponseHeader("X-Moz-Is-Feed");
+    }
+    catch (ex) {
+      this._sniffed = true;
+    }
+
+    this._request = request;
+
+    // Save and reset the forced state bit early, in case there's some kind of
+    // error.
+    let feedService =
+        Cc["@mozilla.org/browser/feeds/result-service;1"].
+        getService(Ci.nsIFeedResultService);
+    this._forcePreviewPage = feedService.forcePreviewPage;
+    feedService.forcePreviewPage = false;
+
+    // Parse feed data as it comes in
+    this._processor =
+        Cc["@mozilla.org/feed-processor;1"].
+        createInstance(Ci.nsIFeedProcessor);
+    this._processor.listener = this;
+    this._processor.parseAsync(null, channel.URI);
+
+    this._processor.onStartRequest(request, context);
+  },
+
+  /**
+   * See nsIRequestObserver.idl
+   */
+  onStopRequest(request, context, status) {
+    if (this._processor)
+      this._processor.onStopRequest(request, context, status);
+  },
+
+  /**
+   * See nsISupports.idl
+   */
+  QueryInterface(iid) {
+    if (iid.equals(Ci.nsIFeedResultListener) ||
+        iid.equals(Ci.nsIStreamConverter) ||
+        iid.equals(Ci.nsIStreamListener) ||
+        iid.equals(Ci.nsIRequestObserver)||
+        iid.equals(Ci.nsISupports))
+      return this;
+    throw Cr.NS_ERROR_NO_INTERFACE;
+  },
+};
+
+/**
+ * Keeps parsed FeedResults around for use elsewhere in the UI after the stream
+ * converter completes.
+ */
+function FeedResultService() {
+}
+
+FeedResultService.prototype = {
+  classID: Components.ID("{2376201c-bbc6-472f-9b62-7548040a61c6}"),
+
+  /**
+   * A URI spec -> [nsIFeedResult] hash. We have to keep a list as the
+   * value in case the same URI is requested concurrently.
+   */
+  _results: { },
+
+  /**
+   * See nsIFeedResultService.idl
+   */
+  forcePreviewPage: false,
+
+  /**
+   * See nsIFeedResultService.idl
+   */
+  addToClientReader(spec, title, subtitle, feedType, feedReader) {
+    if (!feedReader) {
+      feedReader = "default";
+    }
+
+    let handler = safeGetCharPref(getPrefActionForType(feedType), "bookmarks");
+    if (handler == "ask" || handler == "reader")
+      handler = feedReader;
+
+    switch (handler) {
+    case "client":
+      Services.cpmm.sendAsyncMessage("FeedConverter:ExecuteClientApp",
+                                     { spec,
+                                       title,
+                                       subtitle,
+                                       feedHandler: getPrefAppForType(feedType) });
+      break;
+    case "default":
+      // Default system feed reader
+      Services.cpmm.sendAsyncMessage("FeedConverter:ExecuteClientApp",
+                                     { spec,
+                                       title,
+                                       subtitle,
+                                       feedHandler: "default" });
+      break;
+    default:
+      // "web" should have been handled elsewhere
+      LOG("unexpected handler: " + handler);
+      // fall through
+    case "bookmarks":
+      Services.cpmm.sendAsyncMessage("FeedConverter:addLiveBookmark",
+                                     { spec, title, subtitle });
+      break;
+    }
+  },
+
+  /**
+   * See nsIFeedResultService.idl
+   */
+  addFeedResult(feedResult) {
+    NS_ASSERT(feedResult.uri != null, "null URI!");
+    NS_ASSERT(feedResult.uri != null, "null feedResult!");
+    let spec = feedResult.uri.spec;
+    if (!this._results[spec])
+      this._results[spec] = [];
+    this._results[spec].push(feedResult);
+  },
+
+  /**
+   * See nsIFeedResultService.idl
+   */
+  getFeedResult(uri) {
+    NS_ASSERT(uri != null, "null URI!");
+    let resultList = this._results[uri.spec];
+    for (let result of resultList) {
+      if (result.uri == uri)
+        return result;
+    }
+    return null;
+  },
+
+  /**
+   * See nsIFeedResultService.idl
+   */
+  removeFeedResult(uri) {
+    NS_ASSERT(uri != null, "null URI!");
+    let resultList = this._results[uri.spec];
+    if (!resultList)
+      return;
+    let deletions = 0;
+    for (let i = 0; i < resultList.length; ++i) {
+      if (resultList[i].uri == uri) {
+        delete resultList[i];
+        ++deletions;
+      }
+    }
+
+    // send the holes to the end
+    resultList.sort();
+    // and trim the list
+    resultList.splice(resultList.length - deletions, deletions);
+    if (resultList.length == 0)
+      delete this._results[uri.spec];
+  },
+
+  createInstance(outer, iid) {
+    if (outer != null)
+      throw Cr.NS_ERROR_NO_AGGREGATION;
+    return this.QueryInterface(iid);
+  },
+
+  QueryInterface(iid) {
+    if (iid.equals(Ci.nsIFeedResultService) ||
+        iid.equals(Ci.nsIFactory) ||
+        iid.equals(Ci.nsISupports))
+      return this;
+    throw Cr.NS_ERROR_NOT_IMPLEMENTED;
+  },
+};
+
+/**
+ * A protocol handler that attempts to deal with the variant forms of feed:
+ * URIs that are actually either http or https.
+ */
+function GenericProtocolHandler() {
+}
+GenericProtocolHandler.prototype = {
+  _init(scheme) {
+    let ios =
+      Cc["@mozilla.org/network/io-service;1"].
+      getService(Ci.nsIIOService);
+    this._http = ios.getProtocolHandler("http");
+    this._scheme = scheme;
+  },
+
+  get scheme() {
+    return this._scheme;
+  },
+
+  get protocolFlags() {
+    let {URI_DANGEROUS_TO_LOAD, ALLOWS_PROXY_HTTP, ALLOWS_PROXY} =
+      Ci.nsIProtocolHandler;
+    return URI_DANGEROUS_TO_LOAD | ALLOWS_PROXY | ALLOWS_PROXY_HTTP;
+  },
+
+  get defaultPort() {
+    return this._http.defaultPort;
+  },
+
+  allowPort(port, scheme) {
+    return this._http.allowPort(port, scheme);
+  },
+
+  newURI(spec, originalCharset, baseURI) {
+    // Feed URIs can be either nested URIs of the form feed:realURI (in which
+    // case we create a nested URI for the realURI) or feed://example.com, in
+    // which case we create a nested URI for the real protocol which is http.
+
+    let scheme = this._scheme + ":";
+    if (spec.substr(0, scheme.length) != scheme)
+      throw Cr.NS_ERROR_MALFORMED_URI;
+
+    let prefix = spec.substr(scheme.length, 2) == "//" ? "http:" : "";
+    let inner = Services.io.newURI(spec.replace(scheme, prefix),
+                                   originalCharset, baseURI);
+
+    if (!["http", "https"].includes(inner.scheme))
+      throw Cr.NS_ERROR_MALFORMED_URI;
+
+    let uri = Services.io.QueryInterface(Ci.nsINetUtil).newSimpleNestedURI(inner);
+    uri.spec = inner.spec.replace(prefix, scheme);
+    return uri;
+  },
+
+  newChannel2(aUri, aLoadInfo) {
+    let inner = aUri.QueryInterface(Ci.nsINestedURI).innerURI;
+    let channel = Cc["@mozilla.org/network/io-service;1"].
+                  getService(Ci.nsIIOService).
+                  newChannelFromURIWithLoadInfo(inner, aLoadInfo);
+
+    if (channel instanceof Components.interfaces.nsIHttpChannel)
+      // Set this so we know this is supposed to be a feed
+      channel.setRequestHeader("X-Moz-Is-Feed", "1", false);
+    channel.originalURI = aUri;
+    return channel;
+  },
+
+  QueryInterface(iid) {
+    if (iid.equals(Ci.nsIProtocolHandler) ||
+        iid.equals(Ci.nsISupports))
+      return this;
+    throw Cr.NS_ERROR_NO_INTERFACE;
+  }
+};
+
+function FeedProtocolHandler() {
+  this._init('feed');
+}
+FeedProtocolHandler.prototype = new GenericProtocolHandler();
+FeedProtocolHandler.prototype.classID = Components.ID("{4f91ef2e-57ba-472e-ab7a-b4999e42d6c0}");
+
+function PodCastProtocolHandler() {
+  this._init('pcast');
+}
+PodCastProtocolHandler.prototype = new GenericProtocolHandler();
+PodCastProtocolHandler.prototype.classID = Components.ID("{1c31ed79-accd-4b94-b517-06e0c81999d5}");
+
+var components = [FeedConverter,
+                  FeedResultService,
+                  FeedProtocolHandler,
+                  PodCastProtocolHandler];
+
+
+this.NSGetFactory = XPCOMUtils.generateNSGetFactory(components);