[Chromoting] Move shared webapp JS files from crd/js -> base/js

remoting/webapp/crd/js/dns_blackhole_checker.js

-// Copyright 2015 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-'use strict';
-
-/** @suppress {duplicate} */
-var remoting = remoting || {};
-
-(function() {
-
-/** @enum */
-var BlackholeState = {
-  PENDING: 0,
-  OPEN: 1,
-  BLOCKED: 2
-};
-
-/**
- * A SignalStrategy wrapper that performs DNS blackhole check.
- *
- * @param {remoting.SignalStrategy} signalStrategy
- * @constructor
- * @implements {remoting.SignalStrategy}
- */
-remoting.DnsBlackholeChecker = function(signalStrategy) {
-  /** @private */
-  this.signalStrategy_ = signalStrategy;
-  this.signalStrategy_.setStateChangedCallback(
-      this.onWrappedSignalStrategyStateChanged_.bind(this));
-
-  /** @private {?function(remoting.SignalStrategy.State):void} */
-  this.onStateChangedCallback_ = null;
-
-  /** @private */
-  this.state_ = remoting.SignalStrategy.State.NOT_CONNECTED;
-
-  /** @private */
-  this.blackholeState_ = BlackholeState.PENDING;
-
-  /** @private {?remoting.Xhr} */
-  this.xhr_ = null;
-};
-
-/**
- * @const
- * @private
- */
-remoting.DnsBlackholeChecker.URL_TO_REQUEST_ =
-    "https://chromoting-client.talkgadget.google.com/talkgadget/oauth/" +
-    "chrome-remote-desktop-client";
-
-/**
- * @param {?function(remoting.SignalStrategy.State):void} onStateChangedCallback
- *   Callback to call on state change.
- */
-remoting.DnsBlackholeChecker.prototype.setStateChangedCallback = function(
-    onStateChangedCallback) {
-  this.onStateChangedCallback_ = onStateChangedCallback;
-};
-
-/**
- * @param {?function(Element):void} onIncomingStanzaCallback Callback to call on
- *     incoming messages.
- */
-remoting.DnsBlackholeChecker.prototype.setIncomingStanzaCallback =
-    function(onIncomingStanzaCallback) {
-  this.signalStrategy_.setIncomingStanzaCallback(onIncomingStanzaCallback);
-};
-
-/** @return {remoting.SignalStrategy.Type} The signal strategy type. */
-remoting.DnsBlackholeChecker.prototype.getType = function() {
-  return this.signalStrategy_.getType();
-};
-
-/**
- * @param {string} server
- * @param {string} username
- * @param {string} authToken
- */
-remoting.DnsBlackholeChecker.prototype.connect = function(server,
-                                                          username,
-                                                          authToken) {
-  base.debug.assert(this.onStateChangedCallback_ != null);
-
-  this.signalStrategy_.connect(server, username, authToken);
-
-  this.xhr_ = new remoting.Xhr({
-    method: 'GET',
-    url: remoting.DnsBlackholeChecker.URL_TO_REQUEST_
-  });
-  this.xhr_.start().then(this.onHttpRequestDone_.bind(this));
-};
-
-remoting.DnsBlackholeChecker.prototype.getState = function() {
-  return this.state_;
-};
-
-remoting.DnsBlackholeChecker.prototype.getError = function() {
-  if (this.blackholeState_ == BlackholeState.BLOCKED) {
-    return new remoting.Error(remoting.Error.Tag.NOT_AUTHORIZED);
-  }
-
-  return this.signalStrategy_.getError();
-};
-
-remoting.DnsBlackholeChecker.prototype.getJid = function() {
-  base.debug.assert(this.state_ == remoting.SignalStrategy.State.CONNECTED);
-  return this.signalStrategy_.getJid();
-};
-
-remoting.DnsBlackholeChecker.prototype.dispose = function() {
-  this.xhr_ = null;
-  base.dispose(this.signalStrategy_);
-  this.setState_(remoting.SignalStrategy.State.CLOSED);
-};
-
-/**
- * @param {remoting.LogToServer} logToServer The LogToServer instance for the
- *     connection.
- */
-remoting.DnsBlackholeChecker.prototype.sendConnectionSetupResults = function(
-    logToServer) {
-  this.signalStrategy_.sendConnectionSetupResults(logToServer)
-};
-
-/** @param {string} message */
-remoting.DnsBlackholeChecker.prototype.sendMessage = function(message) {
-  base.debug.assert(this.state_ == remoting.SignalStrategy.State.CONNECTED);
-  this.signalStrategy_.sendMessage(message);
-};
-
-/** @param {remoting.SignalStrategy.State} state */
-remoting.DnsBlackholeChecker.prototype.onWrappedSignalStrategyStateChanged_ =
-    function(state) {
-  switch (this.blackholeState_) {
-    case BlackholeState.PENDING:
-      // Stay in HANDSHAKE state if we are still waiting for the HTTP request.
-      if (state != remoting.SignalStrategy.State.CONNECTED) {
-        this.setState_(state);
-      }
-      break;
-    case BlackholeState.OPEN:
-      this.setState_(state);
-      break;
-    case BlackholeState.BLOCKED:
-      // In case DNS blackhole is active the external state stays FAILED.
-      break;
-  }
-};
-
-/**
- * @param {!remoting.Xhr.Response} response
- * @private
- */
-remoting.DnsBlackholeChecker.prototype.onHttpRequestDone_ = function(response) {
-  if (this.xhr_ == null) {
-    // This happens when the dispose() method is called while a
-    // request is pending.
-    return;
-  }
-
-  this.xhr_ = null;
-  if (response.status >= 200 && response.status <= 299) {
-    console.log("DNS blackhole check succeeded.");
-    this.blackholeState_ = BlackholeState.OPEN;
-    if (this.signalStrategy_.getState() ==
-        remoting.SignalStrategy.State.CONNECTED) {
-      this.setState_(remoting.SignalStrategy.State.CONNECTED);
-    }
-  } else {
-    console.error("DNS blackhole check failed: " + response.status + " " +
-                  response.statusText + ". Response URL: " +
-                  response.url + ". Response Text: " +
-                  response.getText());
-    this.blackholeState_ = BlackholeState.BLOCKED;
-    base.dispose(this.signalStrategy_);
-    this.setState_(remoting.SignalStrategy.State.FAILED);
-  }
-};
-
-/**
- * @param {remoting.SignalStrategy.State} newState
- * @private
- */
-remoting.DnsBlackholeChecker.prototype.setState_ = function(newState) {
-  if (this.state_ != newState) {
-    this.state_ = newState;
-    this.onStateChangedCallback_(this.state_);
-  }
-};
-
-}());