[minor] add example to test concurrency

examples/concurrent-proxy.js

@@ -0,0 +1,65 @@
+/*
+  concurrent-proxy.js: check levelof concurrency through proxy.
+
+  Copyright (c) 2010 Charlie Robbins, Mikeal Rogers, Fedor Indutny, & Marak Squires.
+
+  Permission is hereby granted, free of charge, to any person obtaining
+  a copy of this software and associated documentation files (the
+  "Software"), to deal in the Software without restriction, including
+  without limitation the rights to use, copy, modify, merge, publish,
+  distribute, sublicense, and/or sell copies of the Software, and to
+  permit persons to whom the Software is furnished to do so, subject to
+  the following conditions:
+
+  The above copyright notice and this permission notice shall be
+  included in all copies or substantial portions of the Software.
+
+  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+  EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+  MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+  NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+  LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+  OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+  WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+*/
+
+var util = require('util'),
+    colors = require('colors'),
+    http = require('http'),
+    httpProxy = require('./../lib/node-http-proxy');
+
+//
+// Basic Http Proxy Server
+//
+httpProxy.createServer(9000, 'localhost').listen(8000);
+
+//
+// Target Http Server
+//
+// to check apparent problems with concurrent connections
+// make a server which only responds when there is a given nubmer on connections
+//
+
+
+var connections = []
+  , go
+
+http.createServer(function (req, res) {
+      
+  connections.push (function (){
+    res.writeHead(200, { 'Content-Type': 'text/plain' });
+    res.write('request successfully proxied to: ' + req.url + '\n' + JSON.stringify(req.headers, true, 2));
+    res.end();
+  })
+  process.stdout.write(connections.length + ', ')
+  if (connections.length > 110 || go) {
+    go = true
+    while(connections.length)
+      connections.shift()()
+  }
+
+}).listen(9000);
+
+util.puts('http proxy server'.blue + ' started '.green.bold + 'on port '.blue + '8000'.yellow);
+util.puts('http server '.blue + 'started '.green.bold + 'on port '.blue + '9000 '.yellow);