init

client.js

@@ -0,0 +1,88 @@
+// builtin
+var net = require('net');
+var url = require('url');
+var request = require('request');
+
+var argv = require('optimist')
+    .usage('Usage: $0 --port [num]')
+    .demand(['port'])
+    .options('host', {
+        default: 'http://lt.defunctzombie.com',
+        describe: 'upstream server providing forwarding'
+    })
+    .describe('port', 'internal http server port')
+    .argv;
+
+// local port
+var local_port = argv.port;
+
+// optionally override the upstream server
+var upstream = url.parse(argv.host);
+
+// query options
+var opt = {
+    host: upstream.hostname,
+    port: upstream.port || 80,
+    path: '/',
+    json: true
+};
+
+opt.uri = 'http://' + opt.host + ':' + opt.port + opt.path;
+
+var internal;
+var upstream;
+
+(function connect_proxy() {
+    request(opt, function(err, res, body) {
+        if (err) {
+            console.error('upstream not available: http status %d', res.statusCode);
+            return process.exit(-1);
+        }
+
+        // our assigned hostname and tcp port
+        var port = body.port;
+        var host = opt.host;
+
+        console.log('your url is: %s', body.url);
+
+        // connect to remote tcp server
+        upstream = net.createConnection(port, host);
+
+        // reconnect internal
+        connect_internal();
+
+        upstream.on('end', function() {
+
+            // sever connection to internal server
+            // on reconnect we will re-establish
+            internal.end();
+
+            setTimeout(function() {
+                connect_proxy();
+            }, 1000);
+        });
+    });
+})();
+
+function connect_internal() {
+
+    internal = net.createConnection(local_port);
+    internal.on('error', function(err) {
+        console.log('error connecting to local server. retrying in 1s');
+
+        setTimeout(function() {
+            connect_internal();
+        }, 1000);
+    });
+
+    internal.on('end', function() {
+        console.log('disconnected from local server. retrying in 1s');
+        setTimeout(function() {
+            connect_internal();
+        }, 1000);
+    });
+
+    upstream.pipe(internal);
+    internal.pipe(upstream);
+}
+