1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/toolkit/modules/RemoteAddonsParent.jsm Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,129 @@
1.4 +// -*- Mode: javascript; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*-
1.5 +// This Source Code Form is subject to the terms of the Mozilla Public
1.6 +// License, v. 2.0. If a copy of the MPL was not distributed with this
1.7 +// file, You can obtain one at http://mozilla.org/MPL/2.0/.
1.8 +
1.9 +this.EXPORTED_SYMBOLS = ["RemoteAddonsParent"];
1.10 +
1.11 +const Ci = Components.interfaces;
1.12 +const Cc = Components.classes;
1.13 +const Cu = Components.utils;
1.14 +
1.15 +Cu.import("resource://gre/modules/XPCOMUtils.jsm");
1.16 +Cu.import('resource://gre/modules/Services.jsm');
1.17 +
1.18 +/**
1.19 + * This code listens for nsIContentPolicy hooks firing in child
1.20 + * processes. It then fires all hooks in the parent process and
1.21 + * returns the result to the child.
1.22 + */
1.23 +let ContentPolicyParent = {
1.24 + /**
1.25 + * Some builtin policies will have already run in the child, and
1.26 + * there's no reason to run them in the parent. This is a list of
1.27 + * those policies. We assume that all child processes have the same
1.28 + * set of built-in policies.
1.29 + */
1.30 + _policiesToIgnore: [],
1.31 +
1.32 + init: function() {
1.33 + let ppmm = Cc["@mozilla.org/parentprocessmessagemanager;1"]
1.34 + .getService(Ci.nsIMessageBroadcaster);
1.35 + ppmm.addMessageListener("Addons:ContentPolicy:IgnorePolicies", this);
1.36 + ppmm.addMessageListener("Addons:ContentPolicy:Run", this);
1.37 +
1.38 + Services.obs.addObserver(this, "xpcom-category-entry-added", true);
1.39 + Services.obs.addObserver(this, "xpcom-category-entry-removed", true);
1.40 + },
1.41 +
1.42 + observe: function(aSubject, aTopic, aData) {
1.43 + switch (aTopic) {
1.44 + case "xpcom-category-entry-added":
1.45 + case "xpcom-category-entry-removed":
1.46 + if (aData == "content-policy")
1.47 + this.updatePolicies();
1.48 + break;
1.49 + }
1.50 + },
1.51 +
1.52 + /**
1.53 + * There's no need for the child process to inform us about the
1.54 + * shouldLoad hook if we don't have any policies in the parent to
1.55 + * run. This code iterates over the parent's policies, looking for
1.56 + * ones that should not be ignored. Based on that, it tells the
1.57 + * children whether it needs to be informed about the shouldLoad
1.58 + * hook.
1.59 + */
1.60 + updatePolicies: function() {
1.61 + let needHook = false;
1.62 +
1.63 + let services = Cc["@mozilla.org/categorymanager;1"].getService(Ci.nsICategoryManager)
1.64 + .enumerateCategory("content-policy");
1.65 + while (services.hasMoreElements()) {
1.66 + let item = services.getNext();
1.67 + let name = item.QueryInterface(Components.interfaces.nsISupportsCString).toString();
1.68 +
1.69 + if (this._policiesToIgnore.indexOf(name) == -1) {
1.70 + needHook = true;
1.71 + break;
1.72 + }
1.73 + }
1.74 +
1.75 + let ppmm = Cc["@mozilla.org/parentprocessmessagemanager;1"]
1.76 + .getService(Ci.nsIMessageBroadcaster);
1.77 + ppmm.broadcastAsyncMessage("Addons:ContentPolicy:NeedHook", { needed: needHook });
1.78 + },
1.79 +
1.80 + receiveMessage: function (aMessage) {
1.81 + switch (aMessage.name) {
1.82 + case "Addons:ContentPolicy:IgnorePolicies":
1.83 + this._policiesToIgnore = aMessage.data.policies;
1.84 + this.updatePolicies();
1.85 + break;
1.86 +
1.87 + case "Addons:ContentPolicy:Run":
1.88 + return this.shouldLoad(aMessage.data, aMessage.objects);
1.89 + break;
1.90 + }
1.91 + },
1.92 +
1.93 + shouldLoad: function(aData, aObjects) {
1.94 + let services = Cc["@mozilla.org/categorymanager;1"].getService(Ci.nsICategoryManager)
1.95 + .enumerateCategory("content-policy");
1.96 + while (services.hasMoreElements()) {
1.97 + let item = services.getNext();
1.98 + let name = item.QueryInterface(Components.interfaces.nsISupportsCString).toString();
1.99 + if (this._policiesToIgnore.indexOf(name) != -1)
1.100 + continue;
1.101 +
1.102 + let policy = Cc[name].getService(Ci.nsIContentPolicy);
1.103 + try {
1.104 + let result = policy.shouldLoad(aData.contentType,
1.105 + aObjects.contentLocation,
1.106 + aObjects.requestOrigin,
1.107 + aObjects.node,
1.108 + aData.mimeTypeGuess,
1.109 + null);
1.110 + if (result != Ci.nsIContentPolicy.ACCEPT && result != 0)
1.111 + return result;
1.112 + } catch (e) {}
1.113 + }
1.114 +
1.115 + return Ci.nsIContentPolicy.ACCEPT;
1.116 + },
1.117 +
1.118 + QueryInterface: XPCOMUtils.generateQI([Ci.nsIObserver, Ci.nsISupportsWeakReference]),
1.119 +};
1.120 +
1.121 +let RemoteAddonsParent = {
1.122 + initialized: false,
1.123 +
1.124 + init: function() {
1.125 + if (this.initialized)
1.126 + return;
1.127 +
1.128 + this.initialized = true;
1.129 +
1.130 + ContentPolicyParent.init();
1.131 + },
1.132 +};
