http sync api

lib/httpsync.js

@@ -0,0 +1,66 @@
+/*
+    This file is part of ethereum.js.
+
+    ethereum.js is free software: you can redistribute it and/or modify
+    it under the terms of the GNU Lesser General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    ethereum.js is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU Lesser General Public License for more details.
+
+    You should have received a copy of the GNU Lesser General Public License
+    along with ethereum.js.  If not, see <http://www.gnu.org/licenses/>.
+*/
+/** @file httpsync.js
+ * @authors:
+ *   Marek Kotewicz <marek@ethdev.com>
+ *   Marian Oancea <marian@ethdev.com>
+ * @date 2014
+ */
+
+var HttpSyncProvider = function (host) {
+    this.handlers = [];
+    this.host = host;
+};
+
+/// Transforms inner message to proper jsonrpc object
+/// @param inner message object
+/// @returns jsonrpc object
+function formatJsonRpcObject(object) {
+    return {
+        jsonrpc: '2.0',
+        method: object.call,
+        params: object.args,
+        id: object._id
+    };
+}
+
+/// Transforms jsonrpc object to inner message
+/// @param incoming jsonrpc message 
+/// @returns inner message object
+function formatJsonRpcMessage(message) {
+    var object = JSON.parse(message);
+
+    return {
+        _id: object.id,
+        data: object.result,
+        error: object.error
+    };
+}
+
+HttpSyncProvider.prototype.send = function (payload) {
+    var data = formatJsonRpcObject(payload);
+    
+    var request = new XMLHttpRequest();
+    request.open('POST', this.host, false);
+    request.send(JSON.stringify(data));
+    
+    // check request.status
+    return request.responseText;
+};
+
+module.exports = HttpSyncProvider;
+