Update envoy prototype instructions.

src/envoy/prototype/README.md

@@ -29,10 +29,10 @@ This Proxy will use Envoy and talk to Mixer server.
 
   The server will run at port 9091
 
-* Start backend Echo server. At ESP repo (https://github.com/cloudendpoints/esp)
+* Start backend Echo server.
 
 ```
-  cd test/echo
+  cd test/backend/echo
   npm install
   node echo.js
 ```

test/backend/echo/echo.js

@@ -0,0 +1,84 @@
+// Copyright (C) Extensible Service Proxy Authors
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions
+// are met:
+// 1. Redistributions of source code must retain the above copyright
+//    notice, this list of conditions and the following disclaimer.
+// 2. Redistributions in binary form must reproduce the above copyright
+//    notice, this list of conditions and the following disclaimer in the
+//    documentation and/or other materials provided with the distribution.
+//
+// THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+// ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+// ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+// FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+// DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+// OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+// HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+// LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+// OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+// SUCH DAMAGE.
+//
+////////////////////////////////////////////////////////////////////////////////
+//
+// A Google Cloud Endpoints example implementation of a simple bookstore API.
+
+"use strict";
+
+var http = require('http');
+var server = http.createServer();
+
+var totalReceived = 0;
+var totalData = 0;
+
+server.on('request', function(req, res) {
+  totalReceived += 1;
+  var method = req.method;
+  var url = req.url;
+  if (method == 'GET' && url == '/version') {
+      res.writeHead(200, {"Content-Type": "application/json"});
+      res.write('{"version":"${VERSION}"}');
+      res.end();
+      return;
+  }
+  req.on('data', function(chunk) {
+    totalData += chunk.length;
+    res.write(chunk);
+  })
+  req.on('end', function() {
+    res.end();
+  });
+
+  var cl = req.headers['content-length'];
+  var ct = req.headers['content-type'];
+
+  var headers = {};
+  if (cl !== undefined) {
+    headers['Content-Length'] = cl;
+  }
+  if (ct !== undefined) {
+    headers['Content-Type'] = ct;
+  }
+
+  res.writeHead(200, headers);
+  req.resume();
+});
+
+var totalConnection = 0;
+
+server.on('connection', function(socket) {
+  totalConnection += 1;
+});
+
+setInterval(function() {
+  console.log("Requests received:", totalReceived, " Data: ", totalData, " Connection: ", totalConnection);
+}, 1000);
+
+var port = process.env.PORT || 8080;
+
+server.listen(port, function() {
+  console.log('Listening on port', port);
+});