Refactor buffer concatenation

PR-URL: #159

Author: tshemsedinov

lib/server.js

@@ -13,14 +13,12 @@ const METHOD_OFFSET = '/api/'.length;
 
 const clients = new Map();
 
-const receiveArgs = async req => new Promise(resolve => {
-  const body = [];
+const receiveBody = async req => new Promise(resolve => {
+  const buffers = [];
   req.on('data', chunk => {
-    body.push(chunk);
-  }).on('end', async () => {
-    const data = body.join('');
-    const args = JSON.parse(data);
-    resolve(args);
+    buffers.push(chunk);
+  }).on('end', () => {
+    resolve(Buffer.concat(buffers).toString());
   });
 });
 
@@ -58,8 +56,9 @@ const listener = (req, res) => {
       client.error(403, new Error(`Forbidden: ${url}`));
       return;
     }
-    receiveArgs(req).then(args => {
+    receiveBody(req).then(body => {
       const method = url.substring(METHOD_OFFSET);
+      const args = JSON.parse(body);
       client.rpc(method, args);
     });
   } else {