Adds in routing functionality.

Author: ashr81

Section 3/app/index.js

@@ -0,0 +1,62 @@
+const http = require("http");
+var url = require("url");
+const StringDecoder = require("string_decoder").StringDecoder
+
+const server = http.createServer(function(req, res) {
+  const { 
+    pathname: path,
+    query: queryStringObj
+  } = url.parse(req.url, true);
+  const headers = req.headers
+  const method = req.method.toLowerCase();
+  const trimmedPath = path.replace(/^\/+|\/+$/g,'');
+  const decoder = new StringDecoder('utf-8');
+  let buffer = '';
+  req.on('data', function(data) {
+    buffer += decoder.write(data);
+  })
+  req.on('end', function() {
+    buffer += decoder.end()
+    const choosenPath = typeof(router[trimmedPath]) !== 'undefined' ? router[trimmedPath] : handlers.notFound;
+    var data = {
+      trimmedPath,
+      queryStringObj,
+      method,
+      headers,
+      payload: buffer
+    }
+
+    choosenPath(data, function(statusCode, payload) {
+      statusCode = typeof(statusCode) == 'number' ? statusCode : 200;
+      payload = typeof(payload) == 'object' ? payload : {};
+      var payloadString = JSON.stringify(payload)
+      res.writeHead(statusCode)
+      res.end(payloadString)
+      console.log(`request received on path: ${trimmedPath}
+      with method: ${method} 
+      and query parameters: ${JSON.stringify(queryStringObj)}
+      with headers: ${JSON.stringify(headers)} and payload is: ${buffer} and response values are: 
+      ${statusCode} and payload: ${payloadString}`);
+    })
+  })
+})
+
+server.listen(3000, function() {
+  console.log("Server is listening on port 3000 now.")
+})
+
+// Define handlers
+const handlers = {}
+
+handlers.sample = function(data, callback) {
+  callback(406, { name: 'Sample Handler' })
+}
+
+// Not Found Handler
+handlers.notFound = function(data, callback) {
+  callback(404);
+}
+// Defining request router
+const router = {
+  'sample': handlers.sample
+}