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// Copyright (c) 2014 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.
var jsonRpc = {};
jsonRpc.responseObject = null;
jsonRpc.setLastEvent = function(action, value, modifiers) {
var request = jsonRpc.generateJsonRpcRequest(
'SetLastEvent', [action, value, modifiers]);
return jsonRpc.sendRpcRequest(request);
}
jsonRpc.getLastEvent = function() {
var request = jsonRpc.generateJsonRpcRequest('GetLastEvent', []);
return jsonRpc.sendRpcRequest(request);
}
jsonRpc.clearLastEvent = function() {
var request = jsonRpc.generateJsonRpcRequest('ClearLastEvent', []);
return jsonRpc.sendRpcRequest(request);
}
/**
* Generate the JSON request.
* @param {string} methodname The name of the remote method.
* @param {list} params The method parameters to pass.
* @param {number=} opt_ident The request id.
* @return The JSON-RPC request object
**/
jsonRpc.generateJsonRpcRequest = function(methodname, params, opt_ident) {
ident = opt_ident == undefined ? 0 : opt_ident;
var request = {
"jsonrpc": "2.0",
"method": methodname,
"params": params,
"id": ident
};
return request;
}
/**
* Method to POST the request to the RPC server.
* @param {object} json_request The JSON request object.
**/
jsonRpc.sendRpcRequest = function(json_request) {
jsonRpc.responseObject = null;
var xhr = new XMLHttpRequest();
xhr.open('POST', '/RPC2', true);
xhr.onreadystatechange = function () {
if (xhr.readyState == 4 && xhr.status == 200) {
try {
var response = xhr.responseText;
jsonRpc.responseObject = JSON.parse(response).response;
} catch (err) {
console.error('Could not parse server response.');
return;
}
}
}
string_request = JSON.stringify(json_request);
xhr.send(string_request);
}
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