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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/. */
const Cu = Components.utils;
const Cc = Components.classes;
const Ci = Components.interfaces;
Cu.import("resource://gre/modules/XPCOMUtils.jsm");
const MAX_CACHE_SIZE = 250;
const PREF_UPDATE = "general.useragent.updates.";
const PREF_OVERRIDE = "general.useragent.override.";
const XPCOM_SHUTDOWN = "xpcom-shutdown";
const HTTP_PROTO_HANDLER = Cc["@mozilla.org/network/protocol;1?name=http"]
.getService(Ci.nsIHttpProtocolHandler);
XPCOMUtils.defineLazyServiceGetter(this, "cpmm",
"@mozilla.org/childprocessmessagemanager;1",
"nsISyncMessageSender");
function SiteSpecificUserAgent() {
this.inParent = Cc["@mozilla.org/xre/app-info;1"].getService(Ci.nsIXULRuntime)
.processType == Ci.nsIXULRuntime.PROCESS_TYPE_DEFAULT;
if (this.inParent) {
Cu.import("resource://gre/modules/UserAgentOverrides.jsm");
} else {
Cu.import("resource://gre/modules/Services.jsm");
Services.prefs.addObserver(PREF_OVERRIDE, this, false);
Services.prefs.addObserver(PREF_UPDATE, this, false);
Services.obs.addObserver(this, XPCOM_SHUTDOWN, false);
this.userAgentCache = new Map;
}
}
SiteSpecificUserAgent.prototype = {
getUserAgentForURIAndWindow: function ssua_getUserAgentForURIAndWindow(aURI, aWindow) {
if (this.inParent) {
return UserAgentOverrides.getOverrideForURI(aURI) || HTTP_PROTO_HANDLER.userAgent;
}
let host = aURI.asciiHost;
let cachedResult = this.userAgentCache.get(host);
if (cachedResult) {
return cachedResult;
}
let data = { uri: aURI.spec };
let result = cpmm.sendRpcMessage("Useragent:GetOverride", data)[0] || HTTP_PROTO_HANDLER.userAgent;
if (this.userAgentCache.size >= MAX_CACHE_SIZE) {
this.userAgentCache.clear();
}
this.userAgentCache.set(host, result);
return result;
},
invalidateCache: function() {
this.userAgentCache.clear();
},
clean: function() {
this.userAgentCache.clear();
if (!this.inParent) {
Services.obs.removeObserver(this, XPCOM_SHUTDOWN);
Services.prefs.removeObserver(PREF_OVERRIDE, this);
Services.prefs.removeObserver(PREF_UPDATE, this);
}
},
observe: function(subject, topic, data) {
switch (topic) {
case "nsPref:changed":
this.invalidateCache();
break;
case XPCOM_SHUTDOWN:
this.clean();
break;
}
},
classID: Components.ID("{506c680f-3d1c-4954-b351-2c80afbc37d3}"),
QueryInterface: XPCOMUtils.generateQI([Ci.nsISiteSpecificUserAgent])
};
this.NSGetFactory = XPCOMUtils.generateNSGetFactory([SiteSpecificUserAgent]);
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