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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 EXPORTED_SYMBOLS = ["RemoteAgent", "RemoteAgentFactory"];
const { Services } = ChromeUtils.import("resource://gre/modules/Services.jsm");
const { XPCOMUtils } = ChromeUtils.import(
"resource://gre/modules/XPCOMUtils.jsm"
);
XPCOMUtils.defineLazyModuleGetters(this, {
HttpServer: "chrome://remote/content/server/HTTPD.jsm",
JSONHandler: "chrome://remote/content/JSONHandler.jsm",
Log: "chrome://remote/content/Log.jsm",
Preferences: "resource://gre/modules/Preferences.jsm",
RecommendedPreferences: "chrome://remote/content/RecommendedPreferences.jsm",
TargetList: "chrome://remote/content/targets/TargetList.jsm",
});
XPCOMUtils.defineLazyGetter(this, "log", Log.get);
const ENABLED = "remote.enabled";
const FORCE_LOCAL = "remote.force-local";
const LOOPBACKS = ["localhost", "127.0.0.1", "[::1]"];
class RemoteAgentClass {
get listening() {
return !!this.server && !this.server.isStopped();
}
get debuggerAddress() {
if (!this.server) {
return "";
}
return `${this.host}:${this.port}`;
}
listen(url) {
if (!Preferences.get(ENABLED, false)) {
throw Components.Exception(
"Disabled by preference",
Cr.NS_ERROR_NOT_AVAILABLE
);
}
if (Services.appinfo.processType != Ci.nsIXULRuntime.PROCESS_TYPE_DEFAULT) {
throw Components.Exception(
"May only be instantiated in parent process",
Cr.NS_ERROR_LAUNCHED_CHILD_PROCESS
);
}
if (this.listening) {
return Promise.resolve();
}
if (!(url instanceof Ci.nsIURI)) {
url = Services.io.newURI(url);
}
let { host, port } = url;
if (Preferences.get(FORCE_LOCAL) && !LOOPBACKS.includes(host)) {
throw Components.Exception(
"Restricted to loopback devices",
Cr.NS_ERROR_ILLEGAL_VALUE
);
}
// nsIServerSocket uses -1 for atomic port allocation
if (port === 0) {
port = -1;
}
Preferences.set(RecommendedPreferences);
this.server = new HttpServer();
this.server.registerPrefixHandler("/json/", new JSONHandler(this));
this.targets = new TargetList();
this.targets.on("target-created", (eventName, target) => {
this.server.registerPathHandler(target.path, target);
});
this.targets.on("target-destroyed", (eventName, target) => {
this.server.registerPathHandler(target.path, null);
});
return this.asyncListen(host, port);
}
async asyncListen(host, port) {
try {
await this.targets.watchForTargets();
// Immediatly instantiate the main process target in order
// to be accessible via HTTP endpoint on startup
const mainTarget = this.targets.getMainProcessTarget();
this.server._start(port, host);
Services.obs.notifyObservers(
null,
"remote-listening",
mainTarget.wsDebuggerURL
);
} catch (e) {
await this.close();
log.error(`Unable to start remote agent: ${e.message}`, e);
}
}
close() {
try {
// if called early at startup, preferences may not be available
try {
Preferences.reset(Object.keys(RecommendedPreferences));
} catch (e) {}
// destroy targets before stopping server,
// otherwise the HTTP will fail to stop
if (this.targets) {
this.targets.destructor();
}
if (this.listening) {
return this.server.stop();
}
} catch (e) {
// this function must never fail
log.error("unable to stop listener", e);
} finally {
this.server = null;
this.targets = null;
}
return Promise.resolve();
}
get scheme() {
if (!this.server) {
return null;
}
return this.server.identity.primaryScheme;
}
get host() {
if (!this.server) {
return null;
}
// Bug 1675471: When using the nsIRemoteAgent interface the HTTPd server's
// primary identity ("this.server.identity.primaryHost") is lazily set.
return this.server._host;
}
get port() {
if (!this.server) {
return null;
}
// Bug 1675471: When using the nsIRemoteAgent interface the HTTPd server's
// primary identity ("this.server.identity.primaryPort") is lazily set.
return this.server._port;
}
// XPCOM
get QueryInterface() {
return ChromeUtils.generateQI(["nsIRemoteAgent"]);
}
}
var RemoteAgent = new RemoteAgentClass();
// This is used by the XPCOM codepath which expects a constructor
var RemoteAgentFactory = function() {
return RemoteAgent;
};
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