include fast-json to enhance the stringify of ws message

lib/recorder.js

@@ -7,8 +7,25 @@ const Datastore = require('nedb'),
   logUtil = require('./log'),
   events = require('events'),
   iconv = require('iconv-lite'),
+  fastJson = require('fast-json-stringify'),
   proxyUtil = require('./util');
 
+const wsMessageStingify = fastJson({
+  title: 'ws message stringify',
+  type: 'object',
+  properties: {
+    time: {
+      type: 'integer'
+    },
+    message: {
+      type: 'string'
+    },
+    isToServer: {
+      type: 'boolean'
+    }
+  }
+});
+
 const BODY_FILE_PRFIX = 'res_body_';
 const WS_MESSAGE_FILE_PRFIX = 'ws_message_';
 const CACHE_DIR_PREFIX = 'cache_r';
@@ -113,7 +130,8 @@ class Recorder extends events.EventEmitter {
     if (id < 0) return;
     try {
       const recordWsMessageFile = path.join(cachePath, WS_MESSAGE_FILE_PRFIX + id);
-      fs.appendFile(recordWsMessageFile, JSON.stringify(message) + ',', () => {});
+
+      fs.appendFile(recordWsMessageFile, wsMessageStingify(message) + ',', () => {});
     } catch (e) {
       console.error(e);
       logUtil.error(e.message + e.stack);

lib/requestHandler.js

@@ -744,7 +744,7 @@ function getWsHandler(userRule, recorder, wsClient) {
     /**
     * consruct a message Record from message event
     * @param @required {event} messageEvent the event from websockt.onmessage
-    * @param @required {boolean} isIn whether the message is to or from server
+    * @param @required {boolean} isToServer whether the message is to or from server
     *
     */
     const recordMessage = (messageEvent, isToServer) => {

package.json

@@ -21,6 +21,7 @@
     "compression": "^1.4.4",
     "es6-promise": "^3.3.1",
     "express": "^4.8.5",
+    "fast-json-stringify": "^0.17.0",
     "iconv-lite": "^0.4.6",
     "inquirer": "^3.0.1",
     "ip": "^0.3.2",