gecko-dev/netwerk/base/PACGenerator.js

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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";
const {classes: Cc, interfaces: Ci, utils: Cu, results: Cr} = Components;
Cu.import('resource://gre/modules/XPCOMUtils.jsm');
Cu.import('resource://gre/modules/Services.jsm');
var DEBUG = false;
if (DEBUG) {
debug = function (s) { dump("-*- PACGenerator: " + s + "\n"); };
}
else {
debug = function (s) {};
}
const PACGENERATOR_CONTRACTID = "@mozilla.org/pac-generator;1";
const PACGENERATOR_CID = Components.ID("{788507c4-eb5f-4de8-b19b-e0d531974e8a}");
//
// RFC 2396 section 3.2.2:
//
// host = hostname | IPv4address
// hostname = *( domainlabel "." ) toplabel [ "." ]
// domainlabel = alphanum | alphanum *( alphanum | "-" ) alphanum
// toplabel = alpha | alpha *( alphanum | "-" ) alphanum
// IPv4address = 1*digit "." 1*digit "." 1*digit "." 1*digit
//
const HOST_REGEX =
new RegExp("^(?:" +
// *( domainlabel "." )
"(?:[a-z0-9](?:[a-z0-9-]*[a-z0-9])?\\.)*" +
// toplabel
"[a-z](?:[a-z0-9-]*[a-z0-9])?" +
"|" +
// IPv4 address
"\\d+\\.\\d+\\.\\d+\\.\\d+" +
")$",
"i");
function PACGenerator() {
debug("Starting PAC Generator service.");
}
PACGenerator.prototype = {
classID : PACGENERATOR_CID,
QueryInterface : XPCOMUtils.generateQI([Ci.nsIPACGenerator]),
classInfo : XPCOMUtils.generateCI({classID: PACGENERATOR_CID,
contractID: PACGENERATOR_CONTRACTID,
classDescription: "PACGenerator",
interfaces: [Ci.nsIPACGenerator]}),
/**
* Validate the the host.
*/
isValidHost: function isValidHost(host) {
if (!HOST_REGEX.test(host)) {
debug("Unexpected host: '" + host + "'");
return false;
}
return true;
},
/**
* Returns a PAC string based on proxy settings in the preference.
* Only effective when the network.proxy.pac_generator preference is true.
*/
generate: function generate() {
let enabled, host, port, proxy;
try {
enabled = Services.prefs.getBoolPref("network.proxy.pac_generator");
} catch (ex) {}
if (!enabled) {
debug("PAC Generator disabled.");
return "";
}
let pac = "data:text/plain,function FindProxyForURL(url, host) { ";
// Direct connection for localhost.
pac += "if (shExpMatch(host, 'localhost') || " +
"shExpMatch(host, '127.0.0.1')) {" +
" return 'DIRECT'; } ";
// Rules for browsing proxy.
try {
enabled = Services.prefs.getBoolPref("network.proxy.browsing.enabled");
host = Services.prefs.getCharPref("network.proxy.browsing.host");
port = Services.prefs.getIntPref("network.proxy.browsing.port");
} catch (ex) {}
if (enabled && host && this.isValidHost(host)) {
proxy = host + ":" + ((port && port !== 0) ? port : 8080);
let appOrigins;
try {
appOrigins = Services.prefs.getCharPref("network.proxy.browsing.app_origins");
} catch (ex) {}
pac += "var origins ='" + appOrigins +
"'.split(/[ ,]+/).filter(Boolean); " +
"if ((origins.indexOf('*') > -1 || origins.indexOf(myAppOrigin()) > -1)" +
" && isInBrowser()) { return 'PROXY " + proxy + "'; } ";
}
// Rules for system proxy.
let share;
try {
share = Services.prefs.getBoolPref("network.proxy.share_proxy_settings");
} catch (ex) {}
if (share) {
// Add rules for all protocols.
try {
host = Services.prefs.getCharPref("network.proxy.http");
port = Services.prefs.getIntPref("network.proxy.http_port");
} catch (ex) {}
if (host && this.isValidHost(host)) {
proxy = host + ":" + ((port && port !== 0) ? port : 8080);
pac += "return 'PROXY " + proxy + "'; "
} else {
pac += "return 'DIRECT'; ";
}
} else {
// Add rules for specific protocols.
const proxyTypes = [
{"scheme": "http:", "pref": "http"},
{"scheme": "https:", "pref": "ssl"},
{"scheme": "ftp:", "pref": "ftp"}
];
for (let i = 0; i < proxyTypes.length; i++) {
try {
host = Services.prefs.getCharPref("network.proxy." +
proxyTypes[i]["pref"]);
port = Services.prefs.getIntPref("network.proxy." +
proxyTypes[i]["pref"] + "_port");
} catch (ex) {}
if (host && this.isValidHost(host)) {
proxy = host + ":" + (port === 0 ? 8080 : port);
pac += "if (url.substring(0, " + (proxyTypes[i]["scheme"]).length +
") == '" + proxyTypes[i]["scheme"] + "') { return 'PROXY " +
proxy + "'; } ";
}
}
pac += "return 'DIRECT'; ";
}
pac += "}";
debug("PAC: " + pac);
return pac;
}
};
this.NSGetFactory = XPCOMUtils.generateNSGetFactory([PACGenerator]);