remoting/tools/remote_test_helper/jsonrpc.js

   1 // Copyright (c) 2014 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 var jsonRpc = {};
   6 jsonRpc.responseObject = null;
   7
   8 jsonRpc.setLastEvent = function(action, value, modifiers) {
   9   var request = jsonRpc.generateJsonRpcRequest(
  10     'SetLastEvent', [action, value, modifiers]);
  11   return jsonRpc.sendRpcRequest(request);
  12 }
  13
  14 jsonRpc.getLastEvent = function() {
  15   var request = jsonRpc.generateJsonRpcRequest('GetLastEvent', []);
  16   return jsonRpc.sendRpcRequest(request);
  17 }
  18
  19 jsonRpc.clearLastEvent = function() {
  20   var request = jsonRpc.generateJsonRpcRequest('ClearLastEvent', []);
  21   return jsonRpc.sendRpcRequest(request);
  22 }
  23
  24 /**
  25  * Generate the JSON request.
  26  * @param {string} methodname The name of the remote method.
  27  * @param {list} params The method parameters to pass.
  28  * @param {number=} opt_ident The request id.
  29  * @return The JSON-RPC request object
  30  */
  31 jsonRpc.generateJsonRpcRequest = function(methodname, params, opt_ident) {
  32   ident = opt_ident == undefined ? 0 : opt_ident;
  33   var request = {
  34     "jsonrpc": "2.0",
  35     "method": methodname,
  36     "params": params,
  37     "id": ident
  38     };
  39   return request;
  40 }
  41
  42 /**
  43  * Method to POST the request to the RPC server.
  44  * @param {object} json_request The JSON request object.
  45  */
  46 jsonRpc.sendRpcRequest = function(json_request) {
  47   jsonRpc.responseObject = null;
  48   var xhr = new XMLHttpRequest();
  49   xhr.open('POST', '/RPC2', true);
  50   xhr.onreadystatechange = function () {
  51     if (xhr.readyState == 4 && xhr.status == 200) {
  52       try {
  53         var response = xhr.responseText;
  54         jsonRpc.responseObject = JSON.parse(response).response;
  55       } catch (err) {
  56         console.error('Could not parse server response.');
  57         return;
  58       }
  59     }
  60   }
  61   string_request = JSON.stringify(json_request);
  62   xhr.send(string_request);
  63 }