server + led functionality not working yet

slave/led_pin11.js

@@ -0,0 +1,81 @@
+var http = require("http");
+var url = require("url");
+var express = require('express');
+var getRawBody = require('raw-body');
+var cors = require('cors');
+var gpio = require("pi-gpio");
+
+var argv = process.argv;
+var port = argv[2]
+
+var app = express();
+//led on pin 11
+
+//handle post/put
+app.use(function (req, res, next) {
+  getRawBody(req, {
+    length: req.headers['content-length'],
+    limit: '1mb',
+    encoding: 'utf8'
+  }, function (err, string) {
+    if (err)
+      return next(err);
+    req.text = string;
+    next();
+  })
+});
+
+app.use(cors());
+
+function setLed(nr){
+  gpio.open(11, "output", function(err) {        // Open pin 7
+    console.log("set ddr for led1");
+    //var val = 0;
+    gpio.write(11, 1, function(err, value) {
+      if(err) throw err;
+      console.log("on pin" +  nr + " I get this value " , value);
+    })
+    //gpio.close(11);
+  })
+}
+
+setLed();
+function readLedState(nr, res) {
+  gpio.read(nr,  function(err, value) {
+    if(err) throw err;
+    console.log("on pin" +  nr + " I get this value " , value);    // The current state of the pin
+    ledState = value;
+    res.send(value);
+    //gpio.close(11);
+  });
+}
+
+function writeState(state, cb) {
+  gpio.open(11, "output", function(err) {        // Open pin 7
+    console.log("set ddr for led1");
+    var val = 0;
+    if (state == "on")
+      val = 1;
+    gpio.write(11, val, function() {            // Set pin 7 high (1)
+      console.log("led1/pin11 high");
+      cb(11);
+    });
+  });
+}
+
+app.get("/", function(req, res) {
+  console.log("GET /,  led state is: ", ledState);
+  //res.send(ledState);
+  readLedState(11, res);
+})
+
+app.put("/", function(req, res, next) {
+  console.log("PUT /, fake led state state is: ", ledState, " new value is: ", req.text);
+  ledState = req.text;
+  writeState(ledState, readLedState(11));
+  //res.send(ledState);
+})
+
+app.listen(port);
+
+var ledState = 0;