home *** CD-ROM | disk | FTP | other *** search
- /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
- /* ***** BEGIN LICENSE BLOCK *****
- * Version: MPL 1.1/GPL 2.0/LGPL 2.1
- *
- * The contents of this file are subject to the Mozilla Public License Version
- * 1.1 (the "License"); you may not use this file except in compliance with
- * the License. You may obtain a copy of the License at
- * http://www.mozilla.org/MPL/
- *
- * Software distributed under the License is distributed on an "AS IS" basis,
- * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
- * for the specific language governing rights and limitations under the
- * License.
- *
- * The Original Code is mozilla.org code.
- *
- * The Initial Developer of the Original Code is Robert Sayre.
- * Portions created by the Initial Developer are Copyright (C) 2006
- * the Initial Developer. All Rights Reserved.
- *
- * Contributor(s):
- * Ben Goodger <beng@google.com>
- * Myk Melez <myk@mozilla.org>
- * Michael Ventnor <m.ventnor@gmail.com>
- * Will Guaraldi <will.guaraldi@pculture.org>
- *
- * Alternatively, the contents of this file may be used under the terms of
- * either the GNU General Public License Version 2 or later (the "GPL"), or
- * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
- * in which case the provisions of the GPL or the LGPL are applicable instead
- * of those above. If you wish to allow use of your version of this file only
- * under the terms of either the GPL or the LGPL, and not to allow others to
- * use your version of this file under the terms of the MPL, indicate your
- * decision by deleting the provisions above and replace them with the notice
- * and other provisions required by the GPL or the LGPL. If you do not delete
- * the provisions above, a recipient may use your version of this file under
- * the terms of any one of the MPL, the GPL or the LGPL.
- *
- * ***** END LICENSE BLOCK ***** */
-
- function LOG(str) {
- dump("*** " + str + "\n");
- }
-
- const Ci = Components.interfaces;
- const Cc = Components.classes;
- const Cr = Components.results;
- Components.utils.import("resource://gre/modules/XPCOMUtils.jsm");
- Components.utils.import("resource://gre/modules/ISO8601DateUtils.jsm");
-
- const FP_CONTRACTID = "@mozilla.org/feed-processor;1";
- const FP_CLASSID = Components.ID("{26acb1f0-28fc-43bc-867a-a46aabc85dd4}");
- const FP_CLASSNAME = "Feed Processor";
- const FR_CONTRACTID = "@mozilla.org/feed-result;1";
- const FR_CLASSID = Components.ID("{072a5c3d-30c6-4f07-b87f-9f63d51403f2}");
- const FR_CLASSNAME = "Feed Result";
- const FEED_CONTRACTID = "@mozilla.org/feed;1";
- const FEED_CLASSID = Components.ID("{5d0cfa97-69dd-4e5e-ac84-f253162e8f9a}");
- const FEED_CLASSNAME = "Feed";
- const ENTRY_CONTRACTID = "@mozilla.org/feed-entry;1";
- const ENTRY_CLASSID = Components.ID("{8e4444ff-8e99-4bdd-aa7f-fb3c1c77319f}");
- const ENTRY_CLASSNAME = "Feed Entry";
- const TEXTCONSTRUCT_CONTRACTID = "@mozilla.org/feed-textconstruct;1";
- const TEXTCONSTRUCT_CLASSID =
- Components.ID("{b992ddcd-3899-4320-9909-924b3e72c922}");
- const TEXTCONSTRUCT_CLASSNAME = "Feed Text Construct";
- const GENERATOR_CONTRACTID = "@mozilla.org/feed-generator;1";
- const GENERATOR_CLASSID =
- Components.ID("{414af362-9ad8-4296-898e-62247f25a20e}");
- const GENERATOR_CLASSNAME = "Feed Generator";
- const PERSON_CONTRACTID = "@mozilla.org/feed-person;1";
- const PERSON_CLASSID = Components.ID("{95c963b7-20b2-11db-92f6-001422106990}");
- const PERSON_CLASSNAME = "Feed Person";
-
- const IO_CONTRACTID = "@mozilla.org/network/io-service;1"
- const BAG_CONTRACTID = "@mozilla.org/hash-property-bag;1"
- const ARRAY_CONTRACTID = "@mozilla.org/array;1";
- const SAX_CONTRACTID = "@mozilla.org/saxparser/xmlreader;1";
- const UNESCAPE_CONTRACTID = "@mozilla.org/feed-unescapehtml;1";
-
-
- var gIoService = null;
-
- const XMLNS = "http://www.w3.org/XML/1998/namespace";
- const RSS090NS = "http://my.netscape.com/rdf/simple/0.9/";
- const WAIROLE_NS = "http://www.w3.org/2005/01/wai-rdf/GUIRoleTaxonomy#";
-
- /***** Some general utils *****/
- function strToURI(link, base) {
- var base = base || null;
- if (!gIoService)
- gIoService = Cc[IO_CONTRACTID].getService(Ci.nsIIOService);
- try {
- return gIoService.newURI(link, null, base);
- }
- catch(e) {
- return null;
- }
- }
-
- function isArray(a) {
- return isObject(a) && a.constructor == Array;
- }
-
- function isObject(a) {
- return (a && typeof a == "object") || isFunction(a);
- }
-
- function isFunction(a) {
- return typeof a == "function";
- }
-
- function isIID(a, iid) {
- var rv = false;
- try {
- a.QueryInterface(iid);
- rv = true;
- }
- catch(e) {
- }
- return rv;
- }
-
- function isIArray(a) {
- return isIID(a, Ci.nsIArray);
- }
-
- function isIFeedContainer(a) {
- return isIID(a, Ci.nsIFeedContainer);
- }
-
- function stripTags(someHTML) {
- return someHTML.replace(/<[^>]+>/g,"");
- }
-
- /**
- * Searches through an array of links and returns a JS array
- * of matching property bags.
- */
- const IANA_URI = "http://www.iana.org/assignments/relation/";
- function findAtomLinks(rel, links) {
- var rvLinks = [];
- for (var i = 0; i < links.length; ++i) {
- var linkElement = links.queryElementAt(i, Ci.nsIPropertyBag2);
- // atom:link MUST have @href
- if (bagHasKey(linkElement, "href")) {
- var relAttribute = null;
- if (bagHasKey(linkElement, "rel"))
- relAttribute = linkElement.getPropertyAsAString("rel")
- if ((!relAttribute && rel == "alternate") || relAttribute == rel) {
- rvLinks.push(linkElement);
- continue;
- }
- // catch relations specified by IANA URI
- if (relAttribute == IANA_URI + rel) {
- rvLinks.push(linkElement);
- }
- }
- }
- return rvLinks;
- }
-
- function xmlEscape(s) {
- s = s.replace(/&/g, "&");
- s = s.replace(/>/g, ">");
- s = s.replace(/</g, "<");
- s = s.replace(/"/g, """);
- s = s.replace(/'/g, "'");
- return s;
- }
-
- function arrayContains(array, element) {
- for (var i = 0; i < array.length; ++i) {
- if (array[i] == element) {
- return true;
- }
- }
- return false;
- }
-
- // XXX add hasKey to nsIPropertyBag
- function bagHasKey(bag, key) {
- try {
- bag.getProperty(key);
- return true;
- }
- catch (e) {
- return false;
- }
- }
-
- function makePropGetter(key) {
- return function FeedPropGetter(bag) {
- try {
- return value = bag.getProperty(key);
- }
- catch(e) {
- }
- return null;
- }
- }
-
- function W3CToIETFDate(dateString) {
- var date = ISO8601DateUtils.parse(dateString);
- return date.toUTCString();
- }
-
- const RDF_NS = "http://www.w3.org/1999/02/22-rdf-syntax-ns#";
- // namespace map
- var gNamespaces = {
- "http://webns.net/mvcb/":"admin",
- "http://backend.userland.com/rss":"",
- "http://blogs.law.harvard.edu/tech/rss":"",
- "http://www.w3.org/2005/Atom":"atom",
- "http://purl.org/atom/ns#":"atom03",
- "http://purl.org/rss/1.0/modules/content/":"content",
- "http://purl.org/dc/elements/1.1/":"dc",
- "http://purl.org/dc/terms/":"dcterms",
- "http://www.w3.org/1999/02/22-rdf-syntax-ns#":"rdf",
- "http://purl.org/rss/1.0/":"rss1",
- "http://my.netscape.com/rdf/simple/0.9/":"rss1",
- "http://wellformedweb.org/CommentAPI/":"wfw",
- "http://purl.org/rss/1.0/modules/wiki/":"wiki",
- "http://www.w3.org/XML/1998/namespace":"xml",
- "http://search.yahoo.com/mrss/":"media",
- "http://search.yahoo.com/mrss":"media"
- }
-
- // We allow a very small set of namespaces in XHTML content,
- // for attributes only
- var gAllowedXHTMLNamespaces = {
- "http://www.w3.org/XML/1998/namespace":"xml",
- "http://www.w3.org/TR/xhtml2":"xhtml2",
- "http://www.w3.org/2005/07/aaa":"aaa",
- // if someone ns qualifies XHTML, we have to prefix it to avoid an
- // attribute collision.
- "http://www.w3.org/1999/xhtml":"xhtml"
- }
-
- function FeedResult() {}
- FeedResult.prototype = {
- bozo: false,
- doc: null,
- version: null,
- headers: null,
- uri: null,
- stylesheet: null,
-
- registerExtensionPrefix: function FR_registerExtensionPrefix(ns, prefix) {
- throw Cr.NS_ERROR_NOT_IMPLEMENTED;
- },
-
- // XPCOM stuff
- classDescription: FR_CLASSNAME,
- classID: FR_CLASSID,
- contractID: FR_CONTRACTID,
- QueryInterface: XPCOMUtils.generateQI([Ci.nsIFeedResult])
- }
-
- function Feed() {
- this.subtitle = null;
- this.title = null;
- this.items = Cc[ARRAY_CONTRACTID].createInstance(Ci.nsIMutableArray);
- this.link = null;
- this.id = null;
- this.generator = null;
- this.authors = Cc[ARRAY_CONTRACTID].createInstance(Ci.nsIMutableArray);
- this.contributors = Cc[ARRAY_CONTRACTID].createInstance(Ci.nsIMutableArray);
- this.baseURI = null;
- this.enclosureCount = 0;
- this.type = Ci.nsIFeed.TYPE_FEED;
- }
-
- Feed.prototype = {
- searchLists: {
- title: ["title", "rss1:title", "atom03:title", "atom:title"],
- subtitle: ["description","dc:description","rss1:description",
- "atom03:tagline","atom:subtitle"],
- items: ["items","atom03_entries","entries"],
- id: ["atom:id","rdf:about"],
- generator: ["generator"],
- authors : ["authors"],
- contributors: ["contributors"],
- title: ["title","rss1:title", "atom03:title","atom:title"],
- link: [["link",strToURI],["rss1:link",strToURI]],
- categories: ["categories", "dc:subject"],
- rights: ["atom03:rights","atom:rights"],
- cloud: ["cloud"],
- image: ["image", "rss1:image", "atom:logo"],
- textInput: ["textInput", "rss1:textinput"],
- skipDays: ["skipDays"],
- skipHours: ["skipHours"],
- updated: ["pubDate", "lastBuildDate", "atom03:modified", "dc:date",
- "dcterms:modified", "atom:updated"]
- },
-
- normalize: function Feed_normalize() {
- fieldsToObj(this, this.searchLists);
- if (this.skipDays)
- this.skipDays = this.skipDays.getProperty("days");
- if (this.skipHours)
- this.skipHours = this.skipHours.getProperty("hours");
-
- if (this.updated)
- this.updated = dateParse(this.updated);
-
- // Assign Atom link if needed
- if (bagHasKey(this.fields, "links"))
- this._atomLinksToURI();
-
- this._calcEnclosureCountAndFeedType();
-
- // Resolve relative image links
- if (this.image && bagHasKey(this.image, "url"))
- this._resolveImageLink();
-
- this._resetBagMembersToRawText([this.searchLists.subtitle,
- this.searchLists.title]);
- },
-
- _calcEnclosureCountAndFeedType: function Feed_calcEnclosureCountAndFeedType() {
- var entries_with_enclosures = 0;
- var audio_count = 0;
- var image_count = 0;
- var video_count = 0;
- var other_count = 0;
-
- for (var i = 0; i < this.items.length; ++i) {
- var entry = this.items.queryElementAt(i, Ci.nsIFeedEntry);
- entry.QueryInterface(Ci.nsIFeedContainer);
-
- if (entry.enclosures && entry.enclosures.length > 0) {
- ++entries_with_enclosures;
-
- for (var e = 0; e < entry.enclosures.length; ++e) {
- var enc = entry.enclosures.queryElementAt(e, Ci.nsIWritablePropertyBag2);
- if (enc.hasKey("type")) {
- var enctype = enc.get("type");
-
- if (/^audio/.test(enctype)) {
- ++audio_count;
- } else if (/^image/.test(enctype)) {
- ++image_count;
- } else if (/^video/.test(enctype)) {
- ++video_count;
- } else {
- ++other_count;
- }
- } else {
- ++other_count;
- }
- }
- }
- }
-
- var feedtype = Ci.nsIFeed.TYPE_FEED;
-
- // For a feed to be marked as TYPE_VIDEO, TYPE_AUDIO and TYPE_IMAGE,
- // we enforce two things:
- //
- // 1. all entries must have at least one enclosure
- // 2. all enclosures must be video for TYPE_VIDEO, audio for TYPE_AUDIO or image
- // for TYPE_IMAGE
- //
- // Otherwise it's a TYPE_FEED.
- if (entries_with_enclosures == this.items.length && other_count == 0) {
- if (audio_count > 0 && !video_count && !image_count) {
- feedtype = Ci.nsIFeed.TYPE_AUDIO;
-
- } else if (image_count > 0 && !audio_count && !video_count) {
- feedtype = Ci.nsIFeed.TYPE_IMAGE;
-
- } else if (video_count > 0 && !audio_count && !image_count) {
- feedtype = Ci.nsIFeed.TYPE_VIDEO;
- }
- }
-
- this.type = feedtype;
- this.enclosureCount = other_count + video_count + audio_count + image_count;
- },
-
- _atomLinksToURI: function Feed_linkToURI() {
- var links = this.fields.getPropertyAsInterface("links", Ci.nsIArray);
- var alternates = findAtomLinks("alternate", links);
- if (alternates.length > 0) {
- var href = alternates[0].getPropertyAsAString("href");
- var base;
- if (bagHasKey(alternates[0], "xml:base"))
- base = alternates[0].getPropertyAsAString("xml:base");
- this.link = this._resolveURI(href, base);
- }
- },
-
- _resolveImageLink: function Feed_resolveImageLink() {
- var base;
- if (bagHasKey(this.image, "xml:base"))
- base = this.image.getPropertyAsAString("xml:base");
- var url = this._resolveURI(this.image.getPropertyAsAString("url"), base);
- if (url)
- this.image.setPropertyAsAString("url", url.spec);
- },
-
- _resolveURI: function Feed_resolveURI(linkSpec, baseSpec) {
- var uri = null;
- try {
- var base = baseSpec ? strToURI(baseSpec, this.baseURI) : this.baseURI;
- uri = strToURI(linkSpec, base);
- }
- catch(e) {
- LOG(e);
- }
-
- return uri;
- },
-
- // reset the bag to raw contents, not text constructs
- _resetBagMembersToRawText: function Feed_resetBagMembers(fieldLists) {
- for (var i=0; i<fieldLists.length; i++) {
- for (var j=0; j<fieldLists[i].length; j++) {
- if (bagHasKey(this.fields, fieldLists[i][j])) {
- var textConstruct = this.fields.getProperty(fieldLists[i][j]);
- this.fields.setPropertyAsAString(fieldLists[i][j],
- textConstruct.text);
- }
- }
- }
- },
-
- // XPCOM stuff
- classDescription: FEED_CLASSNAME,
- classID: FEED_CLASSID,
- contractID: FEED_CONTRACTID,
- QueryInterface: XPCOMUtils.generateQI([Ci.nsIFeed, Ci.nsIFeedContainer])
- }
-
- function Entry() {
- this.summary = null;
- this.content = null;
- this.title = null;
- this.fields = Cc["@mozilla.org/hash-property-bag;1"].
- createInstance(Ci.nsIWritablePropertyBag2);
- this.link = null;
- this.id = null;
- this.baseURI = null;
- this.updated = null;
- this.published = null;
- this.authors = Cc[ARRAY_CONTRACTID].createInstance(Ci.nsIMutableArray);
- this.contributors = Cc[ARRAY_CONTRACTID].createInstance(Ci.nsIMutableArray);
- }
-
- Entry.prototype = {
- fields: null,
- enclosures: null,
- mediaContent: null,
-
- searchLists: {
- title: ["title", "rss1:title", "atom03:title", "atom:title"],
- link: [["link",strToURI],["rss1:link",strToURI]],
- id: [["guid", makePropGetter("guid")], "rdf:about",
- "atom03:id", "atom:id"],
- authors : ["authors"],
- contributors: ["contributors"],
- summary: ["description", "rss1:description", "dc:description",
- "atom03:summary", "atom:summary"],
- content: ["content:encoded","atom03:content","atom:content"],
- rights: ["atom03:rights","atom:rights"],
- published: ["pubDate", "atom03:issued", "dcterms:issued", "atom:published"],
- updated: ["pubDate", "atom03:modified", "dc:date", "dcterms:modified",
- "atom:updated"]
- },
-
- normalize: function Entry_normalize() {
- fieldsToObj(this, this.searchLists);
-
- // Assign Atom link if needed
- if (bagHasKey(this.fields, "links"))
- this._atomLinksToURI();
-
- // Populate enclosures array
- this._populateEnclosures();
-
- // The link might be a guid w/ permalink=true
- if (!this.link && bagHasKey(this.fields, "guid")) {
- var guid = this.fields.getProperty("guid");
- var isPermaLink = true;
-
- if (bagHasKey(guid, "isPermaLink"))
- isPermaLink = guid.getProperty("isPermaLink").toLowerCase() != "false";
-
- if (guid && isPermaLink)
- this.link = strToURI(guid.getProperty("guid"));
- }
-
- if (this.updated)
- this.updated = dateParse(this.updated);
- if (this.published)
- this.published = dateParse(this.published);
-
- this._resetBagMembersToRawText([this.searchLists.content,
- this.searchLists.summary,
- this.searchLists.title]);
- },
-
- _populateEnclosures: function Entry_populateEnclosures() {
- if (bagHasKey(this.fields, "links"))
- this._atomLinksToEnclosures();
-
- // Add RSS2 enclosure to enclosures
- if (bagHasKey(this.fields, "enclosure"))
- this._enclosureToEnclosures();
-
- // Add media:content to enclosures
- if (bagHasKey(this.fields, "mediacontent"))
- this._mediacontentToEnclosures();
-
- // Add media:content in media:group to enclosures
- if (bagHasKey(this.fields, "mediagroup"))
- this._mediagroupToEnclosures();
- },
-
- __enclosure_map: null,
-
- _addToEnclosures: function Entry_addToEnclosures(new_enc) {
- // items we add to the enclosures array get displayed in the FeedWriter and
- // they must have non-empty urls.
- if (!bagHasKey(new_enc, "url") || new_enc.getPropertyAsAString("url") == "")
- return;
-
- if (this.__enclosure_map == null)
- this.__enclosure_map = {};
-
- var previous_enc = this.__enclosure_map[new_enc.getPropertyAsAString("url")];
-
- if (previous_enc != undefined) {
- previous_enc.QueryInterface(Ci.nsIWritablePropertyBag2);
-
- if (!bagHasKey(previous_enc, "type") && bagHasKey(new_enc, "type"))
- previous_enc.setPropertyAsAString("type", new_enc.getPropertyAsAString("type"));
-
- if (!bagHasKey(previous_enc, "length") && bagHasKey(new_enc, "length"))
- previous_enc.setPropertyAsAString("length", new_enc.getPropertyAsAString("length"));
-
- return;
- }
-
- if (this.enclosures == null) {
- this.enclosures = Cc[ARRAY_CONTRACTID].createInstance(Ci.nsIMutableArray);
- this.enclosures.QueryInterface(Ci.nsIMutableArray);
- }
-
- this.enclosures.appendElement(new_enc, false);
- this.__enclosure_map[new_enc.getPropertyAsAString("url")] = new_enc;
- },
-
- _atomLinksToEnclosures: function Entry_linkToEnclosure() {
- var links = this.fields.getPropertyAsInterface("links", Ci.nsIArray);
- var enc_links = findAtomLinks("enclosure", links);
- if (enc_links.length == 0)
- return;
-
- for (var i = 0; i < enc_links.length; ++i) {
- var link = enc_links[i];
-
- // an enclosure must have an href
- if (!(link.getProperty("href")))
- return;
-
- var enc = Cc[BAG_CONTRACTID].createInstance(Ci.nsIWritablePropertyBag2);
-
- // copy Atom bits over to equivalent enclosure bits
- enc.setPropertyAsAString("url", link.getPropertyAsAString("href"));
- if (bagHasKey(link, "type"))
- enc.setPropertyAsAString("type", link.getPropertyAsAString("type"));
- if (bagHasKey(link, "length"))
- enc.setPropertyAsAString("length", link.getPropertyAsAString("length"));
-
- this._addToEnclosures(enc);
- }
- },
-
- _enclosureToEnclosures: function Entry_enclosureToEnclosures() {
- var enc = this.fields.getPropertyAsInterface("enclosure", Ci.nsIPropertyBag2);
-
- if (!(enc.getProperty("url")))
- return;
-
- this._addToEnclosures(enc);
- },
-
- _mediacontentToEnclosures: function Entry_mediacontentToEnclosures() {
- var mediacontent = this.fields.getPropertyAsInterface("mediacontent", Ci.nsIArray);
-
- for (var i = 0; i < mediacontent.length; ++i) {
- var contentElement = mediacontent.queryElementAt(i, Ci.nsIWritablePropertyBag2);
-
- // media:content don't require url, but if it's not there, we should
- // skip it.
- if (!bagHasKey(contentElement, "url"))
- continue;
-
- var enc = Cc[BAG_CONTRACTID].createInstance(Ci.nsIWritablePropertyBag2);
-
- // copy media:content bits over to equivalent enclosure bits
- enc.setPropertyAsAString("url", contentElement.getPropertyAsAString("url"));
- if (bagHasKey(contentElement, "type")) {
- enc.setPropertyAsAString("type", contentElement.getPropertyAsAString("type"));
- }
- if (bagHasKey(contentElement, "fileSize")) {
- enc.setPropertyAsAString("length", contentElement.getPropertyAsAString("fileSize"));
- }
-
- this._addToEnclosures(enc);
- }
- },
-
- _mediagroupToEnclosures: function Entry_mediagroupToEnclosures() {
- var group = this.fields.getPropertyAsInterface("mediagroup", Ci.nsIPropertyBag2);
-
- var content = group.getPropertyAsInterface("mediacontent", Ci.nsIArray);
- for (var i = 0; i < content.length; ++i) {
- var contentElement = content.queryElementAt(i, Ci.nsIWritablePropertyBag2);
- // media:content don't require url, but if it's not there, we should
- // skip it.
- if (!bagHasKey(contentElement, "url"))
- continue;
-
- var enc = Cc[BAG_CONTRACTID].createInstance(Ci.nsIWritablePropertyBag2);
-
- // copy media:content bits over to equivalent enclosure bits
- enc.setPropertyAsAString("url", contentElement.getPropertyAsAString("url"));
- if (bagHasKey(contentElement, "type")) {
- enc.setPropertyAsAString("type", contentElement.getPropertyAsAString("type"));
- }
- if (bagHasKey(contentElement, "fileSize")) {
- enc.setPropertyAsAString("length", contentElement.getPropertyAsAString("fileSize"));
- }
-
- this._addToEnclosures(enc);
- }
- },
-
- // XPCOM stuff
- classDescription: ENTRY_CLASSNAME,
- classID: ENTRY_CLASSID,
- contractID: ENTRY_CONTRACTID,
- QueryInterface: XPCOMUtils.generateQI(
- [Ci.nsIFeedEntry, Ci.nsIFeedContainer]
- )
- }
-
- Entry.prototype._atomLinksToURI = Feed.prototype._atomLinksToURI;
- Entry.prototype._resolveURI = Feed.prototype._resolveURI;
- Entry.prototype._resetBagMembersToRawText =
- Feed.prototype._resetBagMembersToRawText;
-
- // TextConstruct represents and element that could contain (X)HTML
- function TextConstruct() {
- this.lang = null;
- this.base = null;
- this.type = "text";
- this.text = null;
- this.unescapeHTML = Cc[UNESCAPE_CONTRACTID].
- getService(Ci.nsIScriptableUnescapeHTML);
- }
-
- TextConstruct.prototype = {
- plainText: function TC_plainText() {
- if (this.type != "text") {
- return this.unescapeHTML.unescape(stripTags(this.text));
- }
- return this.text;
- },
-
- createDocumentFragment: function TC_createDocumentFragment(element) {
- if (this.type == "text") {
- var doc = element.ownerDocument;
- var docFragment = doc.createDocumentFragment();
- var node = doc.createTextNode(this.text);
- docFragment.appendChild(node);
- return docFragment;
- }
- var isXML;
- if (this.type == "xhtml")
- isXML = true
- else if (this.type == "html")
- isXML = false;
- else
- return null;
-
- return this.unescapeHTML.parseFragment(this.text, isXML,
- this.base, element);
- },
-
- // XPCOM stuff
- classDescription: TEXTCONSTRUCT_CLASSNAME,
- classID: TEXTCONSTRUCT_CLASSID,
- contractID: TEXTCONSTRUCT_CONTRACTID,
- QueryInterface: XPCOMUtils.generateQI([Ci.nsIFeedTextConstruct])
- }
-
- // Generator represents the software that produced the feed
- function Generator() {
- this.lang = null;
- this.agent = null;
- this.version = null;
- this.uri = null;
-
- // nsIFeedElementBase
- this._attributes = null;
- this.baseURI = null;
- }
-
- Generator.prototype = {
-
- get attributes() {
- return this._attributes;
- },
-
- set attributes(value) {
- this._attributes = value;
- this.version = this._attributes.getValueFromName("","version");
- var uriAttribute = this._attributes.getValueFromName("","uri") ||
- this._attributes.getValueFromName("","url");
- this.uri = strToURI(uriAttribute, this.baseURI);
-
- // RSS1
- uriAttribute = this._attributes.getValueFromName(RDF_NS,"resource");
- if (uriAttribute) {
- this.agent = uriAttribute;
- this.uri = strToURI(uriAttribute, this.baseURI);
- }
- },
-
- // XPCOM stuff
- classDescription: GENERATOR_CLASSNAME,
- classID: GENERATOR_CLASSID,
- contractID: GENERATOR_CONTRACTID,
- QueryInterface: XPCOMUtils.generateQI(
- [Ci.nsIFeedGenerator, Ci.nsIFeedElementBase]
- )
- }
-
- function Person() {
- this.name = null;
- this.uri = null;
- this.email = null;
-
- // nsIFeedElementBase
- this.attributes = null;
- this.baseURI = null;
- }
-
- Person.prototype = {
- // XPCOM stuff
- classDescription: PERSON_CLASSNAME,
- classID: PERSON_CLASSID,
- contractID: PERSON_CONTRACTID,
- QueryInterface: XPCOMUtils.generateQI(
- [Ci.nsIFeedPerson, Ci.nsIFeedElementBase]
- )
- }
-
- /**
- * Map a list of fields into properties on a container.
- *
- * @param container An nsIFeedContainer
- * @param fields A list of fields to search for. List members can
- * be a list, in which case the second member is
- * transformation function (like parseInt).
- */
- function fieldsToObj(container, fields) {
- var props,prop,field,searchList;
- for (var key in fields) {
- searchList = fields[key];
- for (var i=0; i < searchList.length; ++i) {
- props = searchList[i];
- prop = null;
- field = isArray(props) ? props[0] : props;
- try {
- prop = container.fields.getProperty(field);
- }
- catch(e) {
- }
- if (prop) {
- prop = isArray(props) ? props[1](prop) : prop;
- container[key] = prop;
- }
- }
- }
- }
-
- /**
- * Lower cases an element's localName property
- * @param element A DOM element.
- *
- * @returns The lower case localName property of the specified element
- */
- function LC(element) {
- return element.localName.toLowerCase();
- }
-
- // TODO move these post-processor functions
- // create a generator element
- function atomGenerator(s, generator) {
- generator.QueryInterface(Ci.nsIFeedGenerator);
- generator.agent = trimString(s);
- return generator;
- }
-
- // post-process atom:logo to create an RSS2-like structure
- function atomLogo(s, logo) {
- logo.setPropertyAsAString("url", trimString(s));
- }
-
- // post-process an RSS category, map it to the Atom fields.
- function rssCatTerm(s, cat) {
- // add slash handling?
- cat.setPropertyAsAString("term", trimString(s));
- return cat;
- }
-
- // post-process a GUID
- function rssGuid(s, guid) {
- guid.setPropertyAsAString("guid", trimString(s));
- return guid;
- }
-
- // post-process an RSS author element
- //
- // It can contain a field like this:
- //
- // <author>lawyer@boyer.net (Lawyer Boyer)</author>
- //
- // or, delightfully, a field like this:
- //
- // <dc:creator>Simon St.Laurent (mailto:simonstl@simonstl.com)</dc:creator>
- //
- // We want to split this up and assign it to corresponding Atom
- // fields.
- //
- function rssAuthor(s,author) {
- author.QueryInterface(Ci.nsIFeedPerson);
- // check for RSS2 string format
- var chars = trimString(s);
- var matches = chars.match(/(.*)\((.*)\)/);
- var emailCheck =
- /^([a-zA-Z0-9_\.\-])+\@(([a-zA-Z0-9\-])+\.)+([a-zA-Z0-9]{2,4})+$/;
- if (matches) {
- var match1 = trimString(matches[1]);
- var match2 = trimString(matches[2]);
- if (match2.indexOf("mailto:") == 0)
- match2 = match2.substring(7);
- if (emailCheck.test(match1)) {
- author.email = match1;
- author.name = match2;
- }
- else if (emailCheck.test(match2)) {
- author.email = match2;
- author.name = match1;
- }
- else {
- // put it back together
- author.name = match1 + " (" + match2 + ")";
- }
- }
- else {
- author.name = chars;
- if (chars.indexOf('@'))
- author.email = chars;
- }
- return author;
- }
-
- //
- // skipHours and skipDays map to arrays, so we need to change the
- // string to an nsISupports in order to stick it in there.
- //
- function rssArrayElement(s) {
- var str = Cc["@mozilla.org/supports-string;1"].
- createInstance(Ci.nsISupportsString);
- str.data = s;
- str.QueryInterface(Ci.nsISupportsString);
- return str;
- }
-
- /***** Some feed utils from TBird *****/
-
- /**
- * Tests a RFC822 date against a regex.
- * @param aDateStr A string to test as an RFC822 date.
- *
- * @returns A boolean indicating whether the string is a valid RFC822 date.
- */
- function isValidRFC822Date(aDateStr) {
- var regex = new RegExp(RFC822_RE);
- return regex.test(aDateStr);
- }
-
- /**
- * Removes leading and trailing whitespace from a string.
- * @param s The string to trim.
- *
- * @returns A new string with whitespace stripped.
- */
- function trimString(s) {
- return(s.replace(/^\s+/, "").replace(/\s+$/, ""));
- }
-
- // Regular expression matching RFC822 dates
- const RFC822_RE = "^((Mon|Tue|Wed|Thu|Fri|Sat|Sun)([a-z]+)?,? *)?\\d\\d?"
- + " +(Jan|Feb|Mar|Apr|May|Jun|Jul|Aug|Sep|Oct|Nov|Dec)([a-z]+)?"
- + " +\\d\\d(\\d\\d)? +\\d?\\d:\\d\\d(:\\d\\d)?"
- + " +([+-]?\\d\\d\\d\\d|GMT|UT[C]?|(E|C|M|P)(ST|DT)|[A-IK-Z])$";
-
- /**
- * XXX -- need to decide what this should return.
- * XXX -- Is there a Date class usable from C++?
- *
- * Tries tries parsing various date formats.
- * @param dateString
- * A string that is supposedly an RFC822 or RFC3339 date.
- * @returns A Date.toString XXX--fixme
- */
- function dateParse(dateString) {
- var date = trimString(dateString);
-
- if (date.search(/^\d\d\d\d/) != -1) //Could be a ISO8601/W3C date
- return W3CToIETFDate(dateString);
-
- if (isValidRFC822Date(date))
- return date;
-
- if (!isNaN(parseInt(date, 10))) {
- //It's an integer, so maybe it's a timestamp
- var d = new Date(parseInt(date, 10) * 1000);
- var now = new Date();
- var yeardiff = now.getFullYear() - d.getFullYear();
- if ((yeardiff >= 0) && (yeardiff < 3)) {
- // it's quite likely the correct date. 3 years is an arbitrary cutoff,
- // but this is an invalid date format, and there's no way to verify
- // its correctness.
- return d.toString();
- }
- }
- // Can't help.
- return null;
- }
-
-
- const XHTML_NS = "http://www.w3.org/1999/xhtml";
-
- // The XHTMLHandler handles inline XHTML found in things like atom:summary
- function XHTMLHandler(processor, isAtom, waiPrefixes) {
- this._buf = "";
- this._processor = processor;
- this._depth = 0;
- this._isAtom = isAtom;
- // a stack of lists tracking in-scope namespaces
- this._inScopeNS = [];
- this._waiPrefixes = waiPrefixes;
- }
-
- // The fidelity can be improved here, to allow handling of stuff like
- // SVG and MathML. XXX
- XHTMLHandler.prototype = {
-
- // look back up at the declared namespaces
- // we always use the same prefixes for our safe stuff
- _isInScope: function XH__isInScope(ns) {
- for (var i in this._inScopeNS) {
- for (var uri in this._inScopeNS[i]) {
- if (this._inScopeNS[i][uri] == ns)
- return true;
- }
- }
- return false;
- },
-
- startDocument: function XH_startDocument() {
- },
- endDocument: function XH_endDocument() {
- },
- startElement: function XH_startElement(uri, localName, qName, attributes) {
- ++this._depth;
- this._inScopeNS.push([]);
-
- // RFC4287 requires XHTML to be wrapped in a div that is *not* part of
- // the content. This prevents people from screwing up namespaces, but
- // we need to skip it here.
- if (this._isAtom && this._depth == 1 && localName == "div")
- return;
-
- // If it's an XHTML element, record it. Otherwise, it's ignored.
- if (uri == XHTML_NS) {
- this._buf += "<" + localName;
- var uri;
- for (var i=0; i < attributes.length; ++i) {
- uri = attributes.getURI(i);
- // XHTML attributes aren't in a namespace
- if (uri == "") {
- this._buf += (" " + attributes.getLocalName(i) + "='" +
- xmlEscape(attributes.getValue(i)) + "'");
- } else {
- // write a small set of allowed attribute namespaces
- var prefix = gAllowedXHTMLNamespaces[uri];
- if (prefix != null) {
- // The attribute value we'll attempt to write
- var attributeValue = xmlEscape(attributes.getValue(i));
-
- // More QName abuse from W3C
- var rolePrefix = "";
- if (attributes.getLocalName(i) == "role") {
- for (var aPrefix in this._waiPrefixes) {
- if (attributeValue.indexOf(aPrefix + ":") == 0) {
- // Now, due to the terrible layer mismatch
- // that is QNames in content, we have to see
- // if the attribute value clashes with our
- // namespace declarations.
- var isCollision = false;
- for (var uriKey in gAllowedXHTMLNamespaces) {
- if (gAllowedXHTMLNamespaces[uriKey] == aPrefix)
- isCollision = true;
- }
-
- if (isCollision) {
- rolePrefix = aPrefix + i;
- attributeValue =
- rolePrefix + ":" +
- attributeValue.substring(aPrefix.length + 1);
- } else {
- rolePrefix = aPrefix;
- }
-
- break;
- }
- }
-
- if (rolePrefix)
- this._buf += (" xmlns:" + rolePrefix +
- "='" + WAIROLE_NS + "'");
- }
-
- // it's an allowed attribute NS.
- // write the attribute
- this._buf += (" " + prefix + ":" +
- attributes.getLocalName(i) +
- "='" + attributeValue + "'");
-
- // write an xmlns declaration if necessary
- if (prefix != "xml" && !this._isInScope(uri)) {
- this._inScopeNS[this._inScopeNS.length - 1].push(uri);
- this._buf += " xmlns:" + prefix + "='" + uri + "'";
- }
- }
- }
- }
- this._buf += ">";
- }
- },
- endElement: function XH_endElement(uri, localName, qName) {
- --this._depth;
- this._inScopeNS.pop();
-
- // We need to skip outer divs in Atom. See comment in startElement.
- if (this._isAtom && this._depth == 0 && localName == "div")
- return;
-
- // When we peek too far, go back to the main processor
- if (this._depth < 0) {
- this._processor.returnFromXHTMLHandler(trimString(this._buf),
- uri, localName, qName);
- return;
- }
- // If it's an XHTML element, record it. Otherwise, it's ignored.
- if (uri == XHTML_NS) {
- this._buf += "</" + localName + ">";
- }
- },
- characters: function XH_characters(data) {
- this._buf += xmlEscape(data);
- },
- startPrefixMapping: function XH_startPrefixMapping(prefix, uri) {
- if (prefix && uri == WAIROLE_NS)
- this._waiPrefixes[prefix] = WAIROLE_NS;
- },
- endPrefixMapping: function FP_endPrefixMapping(prefix) {
- if (prefix)
- delete this._waiPrefixes[prefix];
- },
- processingInstruction: function XH_processingInstruction() {
- },
- }
-
- /**
- * The ExtensionHandler deals with elements we haven't explicitly
- * added to our transition table in the FeedProcessor.
- */
- function ExtensionHandler(processor) {
- this._buf = "";
- this._depth = 0;
- this._hasChildElements = false;
-
- // The FeedProcessor
- this._processor = processor;
-
- // Fields of the outermost extension element.
- this._localName = null;
- this._uri = null;
- this._qName = null;
- this._attrs = null;
- }
-
- ExtensionHandler.prototype = {
- startDocument: function EH_startDocument() {
- },
- endDocument: function EH_endDocument() {
- },
- startElement: function EH_startElement(uri, localName, qName, attrs) {
- ++this._depth;
- var prefix = gNamespaces[uri] ? gNamespaces[uri] + ":" : "";
- var key = prefix + localName;
-
- if (this._depth == 1) {
- this._uri = uri;
- this._localName = localName;
- this._qName = qName;
- this._attrs = attrs;
- }
-
- // if we descend into another element, we won't send text
- this._hasChildElements = (this._depth > 1);
-
- },
- endElement: function EH_endElement(uri, localName, qName) {
- --this._depth;
- if (this._depth == 0) {
- var text = this._hasChildElements ? null : trimString(this._buf);
- this._processor.returnFromExtHandler(this._uri, this._localName,
- text, this._attrs);
- }
- },
- characters: function EH_characters(data) {
- if (!this._hasChildElements)
- this._buf += data;
- },
- startPrefixMapping: function EH_startPrefixMapping() {
- },
- endPrefixMapping: function EH_endPrefixMapping() {
- },
- processingInstruction: function EH_processingInstruction() {
- },
- };
-
-
- /**
- * ElementInfo is a simple container object that describes
- * some characteristics of a feed element. For example, it
- * says whether an element can be expected to appear more
- * than once inside a given entry or feed.
- */
- function ElementInfo(fieldName, containerClass, closeFunc, isArray) {
- this.fieldName = fieldName;
- this.containerClass = containerClass;
- this.closeFunc = closeFunc;
- this.isArray = isArray;
- this.isWrapper = false;
- }
-
- /**
- * FeedElementInfo represents a feed element, usually the root.
- */
- function FeedElementInfo(fieldName, feedVersion) {
- this.isWrapper = false;
- this.fieldName = fieldName;
- this.feedVersion = feedVersion;
- }
-
- /**
- * Some feed formats include vestigial wrapper elements that we don't
- * want to include in our object model, but we do need to keep track
- * of during parsing.
- */
- function WrapperElementInfo(fieldName) {
- this.isWrapper = true;
- this.fieldName = fieldName;
- }
-
- /***** The Processor *****/
- function FeedProcessor() {
- this._reader = Cc[SAX_CONTRACTID].createInstance(Ci.nsISAXXMLReader);
- this._buf = "";
- this._feed = Cc[BAG_CONTRACTID].createInstance(Ci.nsIWritablePropertyBag2);
- this._handlerStack = [];
- this._xmlBaseStack = []; // sparse array keyed to nesting depth
- this._depth = 0;
- this._state = "START";
- this._result = null;
- this._extensionHandler = null;
- this._xhtmlHandler = null;
- this._haveSentResult = false;
-
- // http://www.w3.org/WAI/PF/GUI/ uses QNames in content :(
- this._waiPrefixes = {};
-
- // The nsIFeedResultListener waiting for the parse results
- this.listener = null;
-
- // These elements can contain (X)HTML or plain text.
- // We keep a table here that contains their default treatment
- this._textConstructs = {"atom:title":"text",
- "atom:summary":"text",
- "atom:rights":"text",
- "atom:content":"text",
- "atom:subtitle":"text",
- "description":"html",
- "rss1:description":"html",
- "dc:description":"html",
- "content:encoded":"html",
- "title":"text",
- "rss1:title":"text",
- "atom03:title":"text",
- "atom03:tagline":"text",
- "atom03:summary":"text",
- "atom03:content":"text"};
- this._stack = [];
-
- this._trans = {
- "START": {
- //If we hit a root RSS element, treat as RSS2.
- "rss": new FeedElementInfo("RSS2", "rss2"),
-
- // If we hit an RDF element, if could be RSS1, but we can't
- // verify that until we hit a rss1:channel element.
- "rdf:RDF": new WrapperElementInfo("RDF"),
-
- // If we hit a Atom 1.0 element, treat as Atom 1.0.
- "atom:feed": new FeedElementInfo("Atom", "atom"),
-
- // Treat as Atom 0.3
- "atom03:feed": new FeedElementInfo("Atom03", "atom03"),
- },
-
- /********* RSS2 **********/
- "IN_RSS2": {
- "channel": new WrapperElementInfo("channel")
- },
-
- "IN_CHANNEL": {
- "item": new ElementInfo("items", Cc[ENTRY_CONTRACTID], null, true),
- "managingEditor": new ElementInfo("authors", Cc[PERSON_CONTRACTID],
- rssAuthor, true),
- "dc:creator": new ElementInfo("authors", Cc[PERSON_CONTRACTID],
- rssAuthor, true),
- "dc:author": new ElementInfo("authors", Cc[PERSON_CONTRACTID],
- rssAuthor, true),
- "dc:contributor": new ElementInfo("contributors", Cc[PERSON_CONTRACTID],
- rssAuthor, true),
- "category": new ElementInfo("categories", null, rssCatTerm, true),
- "cloud": new ElementInfo("cloud", null, null, false),
- "image": new ElementInfo("image", null, null, false),
- "textInput": new ElementInfo("textInput", null, null, false),
- "skipDays": new ElementInfo("skipDays", null, null, false),
- "skipHours": new ElementInfo("skipHours", null, null, false),
- "generator": new ElementInfo("generator", Cc[GENERATOR_CONTRACTID],
- atomGenerator, false),
- },
-
- "IN_ITEMS": {
- "author": new ElementInfo("authors", Cc[PERSON_CONTRACTID],
- rssAuthor, true),
- "dc:creator": new ElementInfo("authors", Cc[PERSON_CONTRACTID],
- rssAuthor, true),
- "dc:author": new ElementInfo("authors", Cc[PERSON_CONTRACTID],
- rssAuthor, true),
- "dc:contributor": new ElementInfo("contributors", Cc[PERSON_CONTRACTID],
- rssAuthor, true),
- "category": new ElementInfo("categories", null, rssCatTerm, true),
- "enclosure": new ElementInfo("enclosure", null, null, false),
- "media:content": new ElementInfo("mediacontent", null, null, true),
- "media:group": new ElementInfo("mediagroup", null, null, false),
- "guid": new ElementInfo("guid", null, rssGuid, false)
- },
-
- "IN_SKIPDAYS": {
- "day": new ElementInfo("days", null, rssArrayElement, true)
- },
-
- "IN_SKIPHOURS":{
- "hour": new ElementInfo("hours", null, rssArrayElement, true)
- },
-
- "IN_MEDIAGROUP": {
- "media:content": new ElementInfo("mediacontent", null, null, true)
- },
-
- /********* RSS1 **********/
- "IN_RDF": {
- // If we hit a rss1:channel, we can verify that we have RSS1
- "rss1:channel": new FeedElementInfo("rdf_channel", "rss1"),
- "rss1:image": new ElementInfo("image", null, null, false),
- "rss1:textinput": new ElementInfo("textInput", null, null, false),
- "rss1:item": new ElementInfo("items", Cc[ENTRY_CONTRACTID], null, true),
- },
-
- "IN_RDF_CHANNEL": {
- "admin:generatorAgent": new ElementInfo("generator",
- Cc[GENERATOR_CONTRACTID],
- null, false),
- "dc:creator": new ElementInfo("authors", Cc[PERSON_CONTRACTID],
- rssAuthor, true),
- "dc:author": new ElementInfo("authors", Cc[PERSON_CONTRACTID],
- rssAuthor, true),
- "dc:contributor": new ElementInfo("contributors", Cc[PERSON_CONTRACTID],
- rssAuthor, true),
- },
-
- /********* ATOM 1.0 **********/
- "IN_ATOM": {
- "atom:author": new ElementInfo("authors", Cc[PERSON_CONTRACTID],
- null, true),
- "atom:generator": new ElementInfo("generator", Cc[GENERATOR_CONTRACTID],
- atomGenerator, false),
- "atom:contributor": new ElementInfo("contributors", Cc[PERSON_CONTRACTID],
- null, true),
- "atom:link": new ElementInfo("links", null, null, true),
- "atom:logo": new ElementInfo("atom:logo", null, atomLogo, false),
- "atom:entry": new ElementInfo("entries", Cc[ENTRY_CONTRACTID],
- null, true)
- },
-
- "IN_ENTRIES": {
- "atom:author": new ElementInfo("authors", Cc[PERSON_CONTRACTID],
- null, true),
- "atom:contributor": new ElementInfo("contributors", Cc[PERSON_CONTRACTID],
- null, true),
- "atom:link": new ElementInfo("links", null, null, true),
- },
-
- /********* ATOM 0.3 **********/
- "IN_ATOM03": {
- "atom03:author": new ElementInfo("authors", Cc[PERSON_CONTRACTID],
- null, true),
- "atom03:contributor": new ElementInfo("contributors",
- Cc[PERSON_CONTRACTID],
- null, true),
- "atom03:link": new ElementInfo("links", null, null, true),
- "atom03:entry": new ElementInfo("atom03_entries", Cc[ENTRY_CONTRACTID],
- null, true),
- "atom03:generator": new ElementInfo("generator", Cc[GENERATOR_CONTRACTID],
- atomGenerator, false),
- },
-
- "IN_ATOM03_ENTRIES": {
- "atom03:author": new ElementInfo("authors", Cc[PERSON_CONTRACTID],
- null, true),
- "atom03:contributor": new ElementInfo("contributors",
- Cc[PERSON_CONTRACTID],
- null, true),
- "atom03:link": new ElementInfo("links", null, null, true),
- "atom03:entry": new ElementInfo("atom03_entries", Cc[ENTRY_CONTRACTID],
- null, true)
- }
- }
- }
-
- // See startElement for a long description of how feeds are processed.
- FeedProcessor.prototype = {
-
- // Set ourselves as the SAX handler, and set the base URI
- _init: function FP_init(uri) {
- this._reader.contentHandler = this;
- this._reader.errorHandler = this;
- this._result = Cc[FR_CONTRACTID].createInstance(Ci.nsIFeedResult);
- if (uri) {
- this._result.uri = uri;
- this._reader.baseURI = uri;
- this._xmlBaseStack[0] = uri;
- }
- },
-
- // This function is called once we figure out what type of feed
- // we're dealing with. Some feed types require digging a bit further
- // than the root.
- _docVerified: function FP_docVerified(version) {
- this._result.doc = Cc[FEED_CONTRACTID].createInstance(Ci.nsIFeed);
- this._result.doc.baseURI =
- this._xmlBaseStack[this._xmlBaseStack.length - 1];
- this._result.doc.fields = this._feed;
- this._result.version = version;
- },
-
- // When we're done with the feed, let the listener know what
- // happened.
- _sendResult: function FP_sendResult() {
- this._haveSentResult = true;
- try {
- // Can be null when a non-feed is fed to us
- if (this._result.doc)
- this._result.doc.normalize();
- }
- catch (e) {
- LOG("FIXME: " + e);
- }
-
- try {
- if (this.listener != null)
- this.listener.handleResult(this._result);
- }
- finally {
- this._result = null;
- }
- },
-
- // Parsing functions
- parseFromStream: function FP_parseFromStream(stream, uri) {
- this._init(uri);
- this._reader.parseFromStream(stream, null, stream.available(),
- "application/xml");
- this._reader = null;
- },
-
- parseFromString: function FP_parseFromString(inputString, uri) {
- this._init(uri);
- this._reader.parseFromString(inputString, "application/xml");
- this._reader = null;
- },
-
- parseAsync: function FP_parseAsync(requestObserver, uri) {
- this._init(uri);
- this._reader.parseAsync(requestObserver);
- },
-
- // nsIStreamListener
-
- // The XMLReader will throw sensible exceptions if these get called
- // out of order.
- onStartRequest: function FP_onStartRequest(request, context) {
- // this will throw if the request is not a channel, but so will nsParser.
- var channel = request.QueryInterface(Ci.nsIChannel);
- channel.contentType = "application/vnd.mozilla.maybe.feed";
- this._reader.onStartRequest(request, context);
- },
-
- onStopRequest: function FP_onStopRequest(request, context, statusCode) {
- try {
- this._reader.onStopRequest(request, context, statusCode);
- }
- finally {
- this._reader = null;
- }
- },
-
- onDataAvailable:
- function FP_onDataAvailable(request, context, inputStream, offset, count) {
- this._reader.onDataAvailable(request, context, inputStream, offset, count);
- },
-
- // nsISAXErrorHandler
-
- // We only care about fatal errors. When this happens, we may have
- // parsed through the feed metadata and some number of entries. The
- // listener can still show some of that data if it wants, and we'll
- // set the bozo bit to indicate we were unable to parse all the way
- // through.
- fatalError: function FP_reportError() {
- this._result.bozo = true;
- //XXX need to QI to FeedProgressListener
- if (!this._haveSentResult)
- this._sendResult();
- },
-
- // nsISAXContentHandler
-
- startDocument: function FP_startDocument() {
- //LOG("----------");
- },
-
- endDocument: function FP_endDocument() {
- if (!this._haveSentResult)
- this._sendResult();
- },
-
- // The transitions defined above identify elements that contain more
- // than just text. For example RSS items contain many fields, and so
- // do Atom authors. The only commonly used elements that contain
- // mixed content are Atom Text Constructs of type="xhtml", which we
- // delegate to another handler for cleaning. That leaves a couple
- // different types of elements to deal with: those that should occur
- // only once, such as title elements, and those that can occur
- // multiple times, such as the RSS category element and the Atom
- // link element. Most of the RSS1/DC elements can occur multiple
- // times in theory, but in practice, the only ones that do have
- // analogues in Atom.
- //
- // Some elements are also groups of attributes or sub-elements,
- // while others are simple text fields. For the most part, we don't
- // have to pay explicit attention to the simple text elements,
- // unless we want to post-process the resulting string to transform
- // it into some richer object like a Date or URI.
- //
- // Elements that have more sophisticated content models still end up
- // being dictionaries, whether they are based on attributes like RSS
- // cloud, sub-elements like Atom author, or even items and
- // entries. These elements are treated as "containers". It's
- // theoretically possible for a container to have an attribute with
- // the same universal name as a sub-element, but none of the feed
- // formats allow this by default, and I don't of any extension that
- // works this way.
- //
- startElement: function FP_startElement(uri, localName, qName, attributes) {
- this._buf = "";
- ++this._depth;
- var elementInfo;
-
- //LOG("<" + localName + ">");
-
- // Check for xml:base
- var base = attributes.getValueFromName(XMLNS, "base");
- if (base) {
- this._xmlBaseStack[this._depth] =
- strToURI(base, this._xmlBaseStack[this._xmlBaseStack.length - 1]);
- }
-
- // To identify the element we're dealing with, we look up the
- // namespace URI in our gNamespaces dictionary, which will give us
- // a "canonical" prefix for a namespace URI. For example, this
- // allows Dublin Core "creator" elements to be consistently mapped
- // to "dc:creator", for easy field access by consumer code. This
- // strategy also happens to shorten up our state table.
- var key = this._prefixForNS(uri) + localName;
-
- // Check to see if we need to hand this off to our XHTML handler.
- // The elements we're dealing with will look like this:
- //
- // <title type="xhtml">
- // <div xmlns="http://www.w3.org/1999/xhtml">
- // A title with <b>bold</b> and <i>italics</i>.
- // </div>
- // </title>
- //
- // When it returns in returnFromXHTMLHandler, the handler should
- // give us back a string like this:
- //
- // "A title with <b>bold</b> and <i>italics</i>."
- //
- // The Atom spec explicitly says the div is not part of the content,
- // and explicitly allows whitespace collapsing.
- //
- if ((this._result.version == "atom" || this._result.version == "atom03") &&
- this._textConstructs[key] != null) {
- var type = attributes.getValueFromName("","type");
- if (type != null && type.indexOf("xhtml") >= 0) {
- this._xhtmlHandler =
- new XHTMLHandler(this, (this._result.version == "atom"),
- this._waiPrefixes);
- this._reader.contentHandler = this._xhtmlHandler;
- return;
- }
- }
-
- // Check our current state, and see if that state has a defined
- // transition. For example, this._trans["atom:entry"]["atom:author"]
- // will have one, and it tells us to add an item to our authors array.
- if (this._trans[this._state] && this._trans[this._state][key]) {
- elementInfo = this._trans[this._state][key];
- }
- else {
- // If we don't have a transition, hand off to extension handler
- this._extensionHandler = new ExtensionHandler(this);
- this._reader.contentHandler = this._extensionHandler;
- this._extensionHandler.startElement(uri, localName, qName, attributes);
- return;
- }
-
- // This distinguishes wrappers like 'channel' from elements
- // we'd actually like to do something with (which will test true).
- this._handlerStack[this._depth] = elementInfo;
- if (elementInfo.isWrapper) {
- this._state = "IN_" + elementInfo.fieldName.toUpperCase();
- this._stack.push([this._feed, this._state]);
- }
- else if (elementInfo.feedVersion) {
- this._state = "IN_" + elementInfo.fieldName.toUpperCase();
-
- // Check for the older RSS2 variants
- if (elementInfo.feedVersion == "rss2")
- elementInfo.feedVersion = this._findRSSVersion(attributes);
- else if (uri == RSS090NS)
- elementInfo.feedVersion = "rss090";
-
- this._docVerified(elementInfo.feedVersion);
- this._stack.push([this._feed, this._state]);
- this._mapAttributes(this._feed, attributes);
- }
- else {
- this._state = this._processComplexElement(elementInfo, attributes);
- }
- },
-
- // In the endElement handler, we decrement the stack and look
- // for cleanup/transition functions to execute. The second part
- // of the state transition works as above in startElement, but
- // the state we're looking for is prefixed with an underscore
- // to distinguish endElement events from startElement events.
- endElement: function FP_endElement(uri, localName, qName) {
- var elementInfo = this._handlerStack[this._depth];
- //LOG("</" + localName + ">");
- if (elementInfo && !elementInfo.isWrapper)
- this._closeComplexElement(elementInfo);
-
- // cut down xml:base context
- if (this._xmlBaseStack.length == this._depth + 1)
- this._xmlBaseStack = this._xmlBaseStack.slice(0, this._depth);
-
- // our new state is whatever is at the top of the stack now
- if (this._stack.length > 0)
- this._state = this._stack[this._stack.length - 1][1];
- this._handlerStack = this._handlerStack.slice(0, this._depth);
- --this._depth;
- },
-
- // Buffer up character data. The buffer is cleared with every
- // opening element.
- characters: function FP_characters(data) {
- this._buf += data;
- },
- // TODO: It would be nice to check new prefixes here, and if they
- // don't conflict with the ones we've defined, throw them in a
- // dictionary to check.
- startPrefixMapping: function FP_startPrefixMapping(prefix, uri) {
- // Thanks for QNames in content, W3C
- // This will even be a perf hit for every single feed
- // http://www.w3.org/WAI/PF/GUI/
- if (prefix && uri == WAIROLE_NS)
- this._waiPrefixes[prefix] = WAIROLE_NS;
- },
-
- endPrefixMapping: function FP_endPrefixMapping(prefix) {
- if (prefix)
- delete this._waiPrefixes[prefix];
- },
-
- processingInstruction: function FP_processingInstruction(target, data) {
- if (target == "xml-stylesheet") {
- var hrefAttribute = data.match(/href=[\"\'](.*?)[\"\']/);
- if (hrefAttribute && hrefAttribute.length == 2)
- this._result.stylesheet = strToURI(hrefAttribute[1], this._result.uri);
- }
- },
-
- // end of nsISAXContentHandler
-
- // Handle our more complicated elements--those that contain
- // attributes and child elements.
- _processComplexElement:
- function FP__processComplexElement(elementInfo, attributes) {
- var obj, key, prefix;
-
- // If the container is an entry/item, it'll need to have its
- // more esoteric properties put in the 'fields' property bag.
- if (elementInfo.containerClass == Cc[ENTRY_CONTRACTID]) {
- obj = elementInfo.containerClass.createInstance(Ci.nsIFeedEntry);
- obj.baseURI = this._xmlBaseStack[this._xmlBaseStack.length - 1];
- this._mapAttributes(obj.fields, attributes);
- }
- else if (elementInfo.containerClass) {
- obj = elementInfo.containerClass.createInstance(Ci.nsIFeedElementBase);
- obj.baseURI = this._xmlBaseStack[this._xmlBaseStack.length - 1];
- obj.attributes = attributes; // just set the SAX attributes
- }
- else {
- obj = Cc[BAG_CONTRACTID].createInstance(Ci.nsIWritablePropertyBag2);
- this._mapAttributes(obj, attributes);
- }
-
- // We should have a container/propertyBag that's had its
- // attributes processed. Now we need to attach it to its
- // container.
- var newProp;
-
- // First we'll see what's on top of the stack.
- var container = this._stack[this._stack.length - 1][0];
-
- // Check to see if it has the property
- var prop;
- try {
- prop = container.getProperty(elementInfo.fieldName);
- }
- catch(e) {
- }
-
- if (elementInfo.isArray) {
- if (!prop) {
- container.setPropertyAsInterface(elementInfo.fieldName,
- Cc[ARRAY_CONTRACTID].
- createInstance(Ci.nsIMutableArray));
- }
-
- newProp = container.getProperty(elementInfo.fieldName);
- // XXX This QI should not be necessary, but XPConnect seems to fly
- // off the handle in the browser, and loses track of the interface
- // on large files. Bug 335638.
- newProp.QueryInterface(Ci.nsIMutableArray);
- newProp.appendElement(obj,false);
-
- // If new object is an nsIFeedContainer, we want to deal with
- // its member nsIPropertyBag instead.
- if (isIFeedContainer(obj))
- newProp = obj.fields;
-
- }
- else {
- // If it doesn't, set it.
- if (!prop) {
- container.setPropertyAsInterface(elementInfo.fieldName,obj);
- }
- newProp = container.getProperty(elementInfo.fieldName);
- }
-
- // make our new state name, and push the property onto the stack
- var newState = "IN_" + elementInfo.fieldName.toUpperCase();
- this._stack.push([newProp, newState, obj]);
- return newState;
- },
-
- // Sometimes we need reconcile the element content with the object
- // model for a given feed. We use helper functions to do the
- // munging, but we need to identify array types here, so the munging
- // happens only to the last element of an array.
- _closeComplexElement: function FP__closeComplexElement(elementInfo) {
- var stateTuple = this._stack.pop();
- var container = stateTuple[0];
- var containerParent = stateTuple[2];
- var element = null;
- var isArray = isIArray(container);
-
- // If it's an array and we have to post-process,
- // grab the last element
- if (isArray)
- element = container.queryElementAt(container.length - 1, Ci.nsISupports);
- else
- element = container;
-
- // Run the post-processing function if there is one.
- if (elementInfo.closeFunc)
- element = elementInfo.closeFunc(this._buf, element);
-
- // If an nsIFeedContainer was on top of the stack,
- // we need to normalize it
- if (elementInfo.containerClass == Cc[ENTRY_CONTRACTID])
- containerParent.normalize();
-
- // If it's an array, re-set the last element
- if (isArray)
- container.replaceElementAt(element, container.length - 1, false);
- },
-
- _prefixForNS: function FP_prefixForNS(uri) {
- if (!uri)
- return "";
- var prefix = gNamespaces[uri];
- if (prefix)
- return prefix + ":";
- if (uri.toLowerCase().indexOf("http://backend.userland.com") == 0)
- return "";
- else
- return null;
- },
-
- _mapAttributes: function FP__mapAttributes(bag, attributes) {
- // Cycle through the attributes, and set our properties using the
- // prefix:localNames we find in our namespace dictionary.
- for (var i = 0; i < attributes.length; ++i) {
- var key = this._prefixForNS(attributes.getURI(i)) + attributes.getLocalName(i);
- var val = attributes.getValue(i);
- bag.setPropertyAsAString(key, val);
- }
- },
-
- // Only for RSS2esque formats
- _findRSSVersion: function FP__findRSSVersion(attributes) {
- var versionAttr = trimString(attributes.getValueFromName("", "version"));
- var versions = { "0.91":"rss091",
- "0.92":"rss092",
- "0.93":"rss093",
- "0.94":"rss094" }
- if (versions[versionAttr])
- return versions[versionAttr];
- if (versionAttr.substr(0,2) != "2.")
- return "rssUnknown";
- return "rss2";
- },
-
- // unknown element values are returned here. See startElement above
- // for how this works.
- returnFromExtHandler:
- function FP_returnExt(uri, localName, chars, attributes) {
- --this._depth;
-
- // take control of the SAX events
- this._reader.contentHandler = this;
- if (localName == null && chars == null)
- return;
-
- // we don't take random elements inside rdf:RDF
- if (this._state == "IN_RDF")
- return;
-
- // Grab the top of the stack
- var top = this._stack[this._stack.length - 1];
- if (!top)
- return;
-
- var container = top[0];
- // Grab the last element if it's an array
- if (isIArray(container)) {
- var contract = this._handlerStack[this._depth].containerClass;
- // check if it's something specific, but not an entry
- if (contract && contract != Cc[ENTRY_CONTRACTID]) {
- var el = container.queryElementAt(container.length - 1,
- Ci.nsIFeedElementBase);
- // XXX there must be a way to flatten these interfaces
- if (contract == Cc[PERSON_CONTRACTID])
- el.QueryInterface(Ci.nsIFeedPerson);
- else
- return; // don't know about this interface
-
- var propName = localName;
- var prefix = gNamespaces[uri];
-
- // synonyms
- if ((uri == "" ||
- prefix &&
- ((prefix.indexOf("atom") > -1) ||
- (prefix.indexOf("rss") > -1))) &&
- (propName == "url" || propName == "href"))
- propName = "uri";
-
- try {
- if (el[propName] !== "undefined") {
- var propValue = chars;
- // convert URI-bearing values to an nsIURI
- if (propName == "uri") {
- var base = this._xmlBaseStack[this._xmlBaseStack.length - 1];
- propValue = strToURI(chars, base);
- }
- el[propName] = propValue;
- }
- }
- catch(e) {
- // ignore XPConnect errors
- }
- // the rest of the function deals with entry- and feed-level stuff
- return;
- }
- else {
- container = container.queryElementAt(container.length - 1,
- Ci.nsIWritablePropertyBag2);
- }
- }
-
- // Make the buffer our new property
- var propName = this._prefixForNS(uri) + localName;
-
- // But, it could be something containing HTML. If so,
- // we need to know about that.
- if (this._textConstructs[propName] != null &&
- this._handlerStack[this._depth].containerClass !== null) {
- var newProp = Cc[TEXTCONSTRUCT_CONTRACTID].
- createInstance(Ci.nsIFeedTextConstruct);
- newProp.text = chars;
- // Look up the default type in our table
- var type = this._textConstructs[propName];
- var typeAttribute = attributes.getValueFromName("","type");
- if (this._result.version == "atom" && typeAttribute != null) {
- type = typeAttribute;
- }
- else if (this._result.version == "atom03" && typeAttribute != null) {
- if (typeAttribute.toLowerCase().indexOf("xhtml") >= 0) {
- type = "xhtml";
- }
- else if (typeAttribute.toLowerCase().indexOf("html") >= 0) {
- type = "html";
- }
- else if (typeAttribute.toLowerCase().indexOf("text") >= 0) {
- type = "text";
- }
- }
-
- // If it's rss feed-level description, it's not supposed to have html
- if (this._result.version.indexOf("rss") >= 0 &&
- this._handlerStack[this._depth].containerClass != ENTRY_CONTRACTID) {
- type = "text";
- }
- newProp.type = type;
- newProp.base = this._xmlBaseStack[this._xmlBaseStack.length - 1];
- container.setPropertyAsInterface(propName, newProp);
- }
- else {
- container.setPropertyAsAString(propName, chars);
- }
- },
-
- // Sometimes, we'll hand off SAX handling duties to an XHTMLHandler
- // (see above) that will scrape out non-XHTML stuff, normalize
- // namespaces, and remove the wrapper div from Atom 1.0. When the
- // XHTMLHandler is done, it'll callback here.
- returnFromXHTMLHandler:
- function FP_returnFromXHTMLHandler(chars, uri, localName, qName) {
- // retake control of the SAX content events
- this._reader.contentHandler = this;
-
- // Grab the top of the stack
- var top = this._stack[this._stack.length - 1];
- if (!top)
- return;
- var container = top[0];
-
- // Assign the property
- var newProp = newProp = Cc[TEXTCONSTRUCT_CONTRACTID].
- createInstance(Ci.nsIFeedTextConstruct);
- newProp.text = chars;
- newProp.type = "xhtml";
- newProp.base = this._xmlBaseStack[this._xmlBaseStack.length - 1];
- container.setPropertyAsInterface(this._prefixForNS(uri) + localName,
- newProp);
-
- // XHTML will cause us to peek too far. The XHTML handler will
- // send us an end element to call. RFC4287-valid feeds allow a
- // more graceful way to handle this. Unfortunately, we can't count
- // on compliance at this point.
- this.endElement(uri, localName, qName);
- },
-
- // XPCOM stuff
- classDescription: FP_CLASSNAME,
- classID: FP_CLASSID,
- contractID: FP_CONTRACTID,
- QueryInterface: XPCOMUtils.generateQI(
- [Ci.nsIFeedProcessor, Ci.nsISAXContentHandler, Ci.nsISAXErrorHandler,
- Ci.nsIStreamListener, Ci.nsIRequestObserver]
- )
- }
-
- var components = [FeedProcessor, FeedResult, Feed, Entry,
- TextConstruct, Generator, Person];
- function NSGetModule(compMgr, fileSpec) {
- return XPCOMUtils.generateModule(components);
-
- }
-