remoting/webapp/oauth2_api.js

   1 // Copyright 2013 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 /**
   6  * @fileoverview
   7  * OAuth2 API flow implementations.
   8  */
   9
  10 'use strict';
  11
  12 /** @suppress {duplicate} */
  13 var remoting = remoting || {};
  14
  15 /** @constructor */
  16 remoting.OAuth2Api = function() {
  17 };
  18
  19 /** @private
  20  *  @return {string} OAuth2 token URL.
  21  */
  22 remoting.OAuth2Api.getOAuth2TokenEndpoint_ = function() {
  23   return remoting.settings.OAUTH2_BASE_URL + '/token';
  24 };
  25
  26 /** @private
  27  *  @return {string} OAuth2 userinfo API URL.
  28  */
  29 remoting.OAuth2Api.getOAuth2ApiUserInfoEndpoint_ = function() {
  30   return remoting.settings.OAUTH2_API_BASE_URL + '/v1/userinfo';
  31 };
  32
  33
  34 /**
  35  * Interprets HTTP error responses in authentication XMLHttpRequests.
  36  *
  37  * @private
  38  * @param {number} xhrStatus Status (HTTP response code) of the XMLHttpRequest.
  39  * @return {remoting.Error} An error code to be raised.
  40  */
  41 remoting.OAuth2Api.interpretXhrStatus_ =
  42     function(xhrStatus) {
  43   // Return AUTHENTICATION_FAILED by default, so that the user can try to
  44   // recover from an unexpected failure by signing in again.
  45   /** @type {remoting.Error} */
  46   var error = remoting.Error.AUTHENTICATION_FAILED;
  47   if (xhrStatus == 400 || xhrStatus == 401 || xhrStatus == 403) {
  48     error = remoting.Error.AUTHENTICATION_FAILED;
  49   } else if (xhrStatus == 502 || xhrStatus == 503) {
  50     error = remoting.Error.SERVICE_UNAVAILABLE;
  51   } else if (xhrStatus == 0) {
  52     error = remoting.Error.NETWORK_FAILURE;
  53   } else {
  54     console.warn('Unexpected authentication response code: ' + xhrStatus);
  55   }
  56   return error;
  57 };
  58
  59 /**
  60  * Asynchronously retrieves a new access token from the server.
  61  *
  62  * @param {function(string, number): void} onDone Callback to invoke when
  63  *     the access token and expiration time are successfully fetched.
  64  * @param {function(remoting.Error):void} onError Callback invoked if an
  65  *     error occurs.
  66  * @param {string} clientId OAuth2 client ID.
  67  * @param {string} clientSecret OAuth2 client secret.
  68  * @param {string} refreshToken OAuth2 refresh token to be redeemed.
  69  * @return {void} Nothing.
  70  */
  71 remoting.OAuth2Api.refreshAccessToken = function(
  72     onDone, onError, clientId, clientSecret, refreshToken) {
  73   /** @param {XMLHttpRequest} xhr */
  74   var onResponse = function(xhr) {
  75     if (xhr.status == 200) {
  76       try {
  77         // Don't use jsonParseSafe here unless you move the definition out of
  78         // remoting.js, otherwise this won't work from the OAuth trampoline.
  79         // TODO(jamiewalch): Fix this once we're no longer using the trampoline.
  80         var tokens = JSON.parse(xhr.responseText);
  81         onDone(tokens['access_token'], tokens['expires_in']);
  82       } catch (err) {
  83         console.error('Invalid "token" response from server:',
  84                       /** @type {*} */ (err));
  85         onError(remoting.Error.UNEXPECTED);
  86       }
  87     } else {
  88       console.error('Failed to refresh token. Status: ' + xhr.status +
  89                     ' response: ' + xhr.responseText);
  90       onError(remoting.OAuth2Api.interpretXhrStatus_(xhr.status));
  91     }
  92   };
  93
  94   var parameters = {
  95     'client_id': clientId,
  96     'client_secret': clientSecret,
  97     'refresh_token': refreshToken,
  98     'grant_type': 'refresh_token'
  99   };
 100
 101   remoting.xhr.post(remoting.OAuth2Api.getOAuth2TokenEndpoint_(),
 102                     onResponse, parameters);
 103 };
 104
 105 /**
 106  * Asynchronously exchanges an authorization code for access and refresh tokens.
 107  *
 108  * @param {function(string, string, number): void} onDone Callback to
 109  *     invoke when the refresh token, access token and access token expiration
 110  *     time are successfully fetched.
 111  * @param {function(remoting.Error):void} onError Callback invoked if an
 112  *     error occurs.
 113  * @param {string} clientId OAuth2 client ID.
 114  * @param {string} clientSecret OAuth2 client secret.
 115  * @param {string} code OAuth2 authorization code.
 116  * @param {string} redirectUri Redirect URI used to obtain this code.
 117  * @return {void} Nothing.
 118  */
 119 remoting.OAuth2Api.exchangeCodeForTokens = function(
 120     onDone, onError, clientId, clientSecret, code, redirectUri) {
 121   /** @param {XMLHttpRequest} xhr */
 122   var onResponse = function(xhr) {
 123     if (xhr.status == 200) {
 124       try {
 125         // Don't use jsonParseSafe here unless you move the definition out of
 126         // remoting.js, otherwise this won't work from the OAuth trampoline.
 127         // TODO(jamiewalch): Fix this once we're no longer using the trampoline.
 128         var tokens = JSON.parse(xhr.responseText);
 129         onDone(tokens['refresh_token'],
 130                tokens['access_token'], tokens['expires_in']);
 131       } catch (err) {
 132         console.error('Invalid "token" response from server:',
 133                       /** @type {*} */ (err));
 134         onError(remoting.Error.UNEXPECTED);
 135       }
 136     } else {
 137       console.error('Failed to exchange code for token. Status: ' + xhr.status +
 138                     ' response: ' + xhr.responseText);
 139       onError(remoting.OAuth2Api.interpretXhrStatus_(xhr.status));
 140     }
 141   };
 142
 143   var parameters = {
 144     'client_id': clientId,
 145     'client_secret': clientSecret,
 146     'redirect_uri': redirectUri,
 147     'code': code,
 148     'grant_type': 'authorization_code'
 149   };
 150   remoting.xhr.post(remoting.OAuth2Api.getOAuth2TokenEndpoint_(),
 151                     onResponse, parameters);
 152 };
 153
 154 /**
 155  * Get the user's email address.
 156  *
 157  * @param {function(string):void} onDone Callback invoked when the email
 158  *     address is available.
 159  * @param {function(remoting.Error):void} onError Callback invoked if an
 160  *     error occurs.
 161  * @param {string} token Access token.
 162  * @return {void} Nothing.
 163  */
 164 remoting.OAuth2Api.getEmail = function(onDone, onError, token) {
 165   /** @param {XMLHttpRequest} xhr */
 166   var onResponse = function(xhr) {
 167     if (xhr.status == 200) {
 168       try {
 169         var result = JSON.parse(xhr.responseText);
 170         onDone(result['email']);
 171       } catch (err) {
 172         console.error('Invalid "userinfo" response from server:',
 173                       /** @type {*} */ (err));
 174         onError(remoting.Error.UNEXPECTED);
 175       }
 176     } else {
 177       console.error('Failed to get email. Status: ' + xhr.status +
 178                     ' response: ' + xhr.responseText);
 179       onError(remoting.OAuth2Api.interpretXhrStatus_(xhr.status));
 180     }
 181   };
 182   var headers = { 'Authorization': 'OAuth ' + token };
 183   remoting.xhr.get(remoting.OAuth2Api.getOAuth2ApiUserInfoEndpoint_(),
 184                    onResponse, '', headers);
 185 };