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/* 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/. */
"use strict";
var Ci = Components.interfaces;
var Cc = Components.classes;
var Cu = Components.utils;
var Cr = Components.results;
Cu.import("resource://gre/modules/XPCOMUtils.jsm");
Cu.import("resource://gre/modules/Services.jsm");
XPCOMUtils.defineLazyModuleGetter(this, "MatchPattern",
"resource://gre/modules/MatchPattern.jsm");
XPCOMUtils.defineLazyModuleGetter(this, "WebRequestCommon",
"resource://gre/modules/WebRequestCommon.jsm");
const IS_HTTP = /^https?:/;
var ContentPolicy = {
_classDescription: "WebRequest content policy",
_classID: Components.ID("938e5d24-9ccc-4b55-883e-c252a41f7ce9"),
_contractID: "@mozilla.org/webrequest/policy;1",
QueryInterface: XPCOMUtils.generateQI([Ci.nsIContentPolicy,
Ci.nsIFactory,
Ci.nsISupportsWeakReference]),
init() {
let registrar = Components.manager.QueryInterface(Ci.nsIComponentRegistrar);
registrar.registerFactory(this._classID, this._classDescription, this._contractID, this);
this.contentPolicies = new Map();
Services.cpmm.addMessageListener("WebRequest:AddContentPolicy", this);
Services.cpmm.addMessageListener("WebRequest:RemoveContentPolicy", this);
if (initialProcessData && initialProcessData.webRequestContentPolicies) {
for (let data of initialProcessData.webRequestContentPolicies.values()) {
this.addContentPolicy(data);
}
}
},
addContentPolicy({id, blocking, filter}) {
if (this.contentPolicies.size == 0) {
this.register();
}
if (filter.urls) {
filter.urls = new MatchPattern(filter.urls);
}
this.contentPolicies.set(id, {blocking, filter});
},
receiveMessage(msg) {
switch (msg.name) {
case "WebRequest:AddContentPolicy":
this.addContentPolicy(msg.data);
break;
case "WebRequest:RemoveContentPolicy":
this.contentPolicies.delete(msg.data.id);
if (this.contentPolicies.size == 0) {
this.unregister();
}
break;
}
},
register() {
let catMan = Cc["@mozilla.org/categorymanager;1"].getService(Ci.nsICategoryManager);
catMan.addCategoryEntry("content-policy", this._contractID, this._contractID, false, true);
},
unregister() {
let catMan = Cc["@mozilla.org/categorymanager;1"].getService(Ci.nsICategoryManager);
catMan.deleteCategoryEntry("content-policy", this._contractID, false);
},
shouldLoad(policyType, contentLocation, requestOrigin,
node, mimeTypeGuess, extra, requestPrincipal) {
// Loads of TYPE_DOCUMENT and TYPE_SUBDOCUMENT perform a ConPol check
// within docshell as well as within the ContentSecurityManager. To avoid
// duplicate evaluations we ignore ConPol checks performed within docShell.
if (extra instanceof Ci.nsISupportsString) {
if (extra.data === "conPolCheckFromDocShell") {
return Ci.nsIContentPolicy.ACCEPT;
}
}
if (requestPrincipal &&
Services.scriptSecurityManager.isSystemPrincipal(requestPrincipal)) {
return Ci.nsIContentPolicy.ACCEPT;
}
let url = contentLocation.spec;
if (IS_HTTP.test(url)) {
// We'll handle this in our parent process HTTP observer.
return Ci.nsIContentPolicy.ACCEPT;
}
let block = false;
let ids = [];
for (let [id, {blocking, filter}] of this.contentPolicies.entries()) {
if (WebRequestCommon.typeMatches(policyType, filter.types) &&
WebRequestCommon.urlMatches(contentLocation, filter.urls)) {
if (blocking) {
block = true;
}
ids.push(id);
}
}
if (!ids.length) {
return Ci.nsIContentPolicy.ACCEPT;
}
let windowId = 0;
let parentWindowId = -1;
let mm = Services.cpmm;
function getWindowId(window) {
return window.QueryInterface(Ci.nsIInterfaceRequestor)
.getInterface(Ci.nsIDOMWindowUtils)
.outerWindowID;
}
if (policyType == Ci.nsIContentPolicy.TYPE_SUBDOCUMENT ||
(node instanceof Ci.nsIDOMXULElement && node.localName == "browser")) {
// Chrome sets frameId to the ID of the sub-window. But when
// Firefox loads an iframe, it sets |node| to the <iframe>
// element, whose window is the parent window. We adopt the
// Chrome behavior here.
node = node.contentWindow;
}
if (node) {
let window;
if (node instanceof Ci.nsIDOMWindow) {
window = node;
} else {
let doc;
if (node.ownerDocument) {
doc = node.ownerDocument;
} else {
doc = node;
}
window = doc.defaultView;
}
windowId = getWindowId(window);
if (window.parent !== window) {
parentWindowId = getWindowId(window.parent);
}
let ir = window.QueryInterface(Ci.nsIInterfaceRequestor)
.getInterface(Ci.nsIDocShell)
.QueryInterface(Ci.nsIInterfaceRequestor);
try {
// If e10s is disabled, this throws NS_NOINTERFACE for closed tabs.
mm = ir.getInterface(Ci.nsIContentFrameMessageManager);
} catch (e) {
if (e.result != Cr.NS_NOINTERFACE) {
throw e;
}
}
}
let data = {ids,
url,
type: WebRequestCommon.typeForPolicyType(policyType),
windowId,
parentWindowId};
if (requestOrigin) {
data.originUrl = requestOrigin.spec;
}
if (block) {
let rval = mm.sendSyncMessage("WebRequest:ShouldLoad", data);
if (rval.length == 1 && rval[0].cancel) {
return Ci.nsIContentPolicy.REJECT;
}
} else {
mm.sendAsyncMessage("WebRequest:ShouldLoad", data);
}
return Ci.nsIContentPolicy.ACCEPT;
},
shouldProcess: function(contentType, contentLocation, requestOrigin, insecNode, mimeType, extra) {
return Ci.nsIContentPolicy.ACCEPT;
},
createInstance: function(outer, iid) {
if (outer) {
throw Cr.NS_ERROR_NO_AGGREGATION;
}
return this.QueryInterface(iid);
},
};
ContentPolicy.init();
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