// Copyright (c) 2008-2009 Kris Maglione // // This work is licensed for reuse under an MIT license. Details are // given in the License.txt file included with this file. /* Adds support for data: URIs with chrome privileges * and fragment identifiers. * * "chrome-data:" [; ]* "," [] * * By Kris Maglione, ideas from Ed Anuff's nsChromeExtensionHandler. */ const Ci = Components.interfaces, Cc = Components.classes; Components.utils.import("resource://gre/modules/XPCOMUtils.jsm"); const NS_BINDING_ABORTED = 0x804b0002; const nsIProtocolHandler = Components.interfaces.nsIProtocolHandler; const ioService = Cc["@mozilla.org/network/io-service;1"].getService(Ci.nsIIOService); let channel = Components.classesByID["{61ba33c0-3031-11d3-8cd0-0060b0fc14a3}"] .getService(Ci.nsIProtocolHandler) .newChannel(ioService.newURI("chrome://liberator/content/data", null, null)) .QueryInterface(Ci.nsIRequest); const systemPrincipal = channel.owner; channel.cancel(NS_BINDING_ABORTED); delete channel; function dataURL(type, data) "data:" + (type || "application/xml;encoding=UTF-8") + "," + encodeURIComponent(data); function makeChannel(url, orig) { if (typeof url == "function") url = dataURL.apply(null, url()); let uri = ioService.newURI(url, null, null); let channel = ioService.newChannelFromURI(uri); channel.owner = systemPrincipal; channel.originalURI = orig; return channel; } function fakeChannel(orig) makeChannel("chrome://liberator/content/does/not/exist", orig); function redirect(to, orig) { let html = .toXMLString(); return makeChannel(dataURL('text/html', html), ioService.newURI(to, null, null)); } function ChromeData() {} ChromeData.prototype = { contractID: "@mozilla.org/network/protocol;1?name=chrome-data", classID: Components.ID("{c1b67a07-18f7-4e13-b361-2edcc35a5a0d}"), classDescription: "Data URIs with chrome privileges", QueryInterface: XPCOMUtils.generateQI([Components.interfaces.nsIProtocolHandler]), _xpcom_factory: { createInstance: function (outer, iid) { if (!ChromeData.instance) ChromeData.instance = new ChromeData(); if (outer != null) throw Components.results.NS_ERROR_NO_AGGREGATION; return ChromeData.instance.QueryInterface(iid); } }, scheme: "chrome-data", defaultPort: -1, allowPort: function (port, scheme) false, protocolFlags: nsIProtocolHandler.URI_NORELATIVE | nsIProtocolHandler.URI_NOAUTH | nsIProtocolHandler.URI_IS_UI_RESOURCE, newURI: function (spec, charset, baseURI) { var uri = Components.classes["@mozilla.org/network/standard-url;1"] .createInstance(Components.interfaces.nsIStandardURL) .QueryInterface(Components.interfaces.nsIURI); uri.init(uri.URLTYPE_STANDARD, this.defaultPort, spec, charset, null); return uri; }, newChannel: function (uri) { try { if (uri.scheme == this.scheme) return makeChannel(uri.spec.replace(/^.*?:\/*(.*)(?:#.*)?/, "data:$1"), uri); } catch (e) {} return fakeChannel(); } }; function Liberator() { this.wrappedJSObject = this; const self = this; this.HELP_TAGS = {}; this.FILE_MAP = {}; this.OVERLAY_MAP = {}; } Liberator.prototype = { contractID: "@mozilla.org/network/protocol;1?name=liberator", classID: Components.ID("{9c8f2530-51c8-4d41-b356-319e0b155c44}"), classDescription: "Liberator utility protocol", QueryInterface: XPCOMUtils.generateQI([Components.interfaces.nsIProtocolHandler]), _xpcom_factory: { createInstance: function (outer, iid) { if (!Liberator.instance) Liberator.instance = new Liberator(); if (outer != null) throw Components.results.NS_ERROR_NO_AGGREGATION; return Liberator.instance.QueryInterface(iid); } }, init: function (obj) { for each (let prop in ["HELP_TAGS", "FILE_MAP", "OVERLAY_MAP"]) { this[prop] = this[prop].constructor(); for (let [k, v] in Iterator(obj[prop] || {})) this[prop][k] = v } }, scheme: "liberator", defaultPort: -1, allowPort: function (port, scheme) false, protocolFlags: 0 | nsIProtocolHandler.URI_IS_UI_RESOURCE | nsIProtocolHandler.URI_IS_LOCAL_RESOURCE, newURI: function (spec, charset, baseURI) { var uri = Components.classes["@mozilla.org/network/standard-url;1"] .createInstance(Components.interfaces.nsIStandardURL) .QueryInterface(Components.interfaces.nsIURI); uri.init(uri.URLTYPE_STANDARD, this.defaultPort, spec, charset, baseURI); return uri; }, newChannel: function (uri) { try { switch(uri.host) { case "help": let url = this.FILE_MAP[uri.path.replace(/^\/|#.*/g, "")]; return makeChannel(url, uri); case "help-overlay": url = this.OVERLAY_MAP[uri.path.replace(/^\/|#.*/g, "")]; return makeChannel(url, uri); case "help-tag": let tag = uri.path.substr(1); if (tag in this.HELP_TAGS) return redirect("liberator://help/" + this.HELP_TAGS[tag] + "#" + tag, uri); } } catch (e) {} return fakeChannel(uri); } }; var components = [ChromeData, Liberator]; if(XPCOMUtils.generateNSGetFactory) var NSGetFactory = XPCOMUtils.generateNSGetFactory(components); else function NSGetModule(compMgr, fileSpec) XPCOMUtils.generateModule(components); // vim: set fdm=marker sw=4 ts=4 et: