lab12: init

lab12/chatServer.js

@@ -0,0 +1,39 @@
+const net = require('net');
+const eol = require('os').EOL;
+const crypto = require('crypto');
+
+const HASH_ALG = 'sha256';
+const NAME_LEN = 10;
+
+var srvr = net.createServer();
+var clientList = [];
+
+srvr.on('connection', function(client) {
+  client.name = calcName(client.remoteAddress, client.remotePort);
+  client.write('Welcome, ' + client.name + eol);
+
+  //
+  // **YOUR CODE HERE**
+  //
+  // First, add the client to clientList.
+  //
+  // Next, add a listener to the client for a 'data' event.
+  // This event means that the client typed something in.
+  // Broadcast that message to all **other** clients in clientList.
+  //
+  // For extra challenges, try adding the following functionality:
+  // 1) Typing '\list' will list the names of all other users.
+  // 2) Typing '\rename <newname>' will let the user specify a new name for himself/herself.
+  // 3) Typing '\private <name> <msg>' will send a message only to the specified user.
+
+});
+
+function calcName(remoteAddress, remotePort) {
+  let data = remoteAddress + ":" + remotePort;
+  let h = crypto.createHash(HASH_ALG).update(data).digest('hex')
+  return h.substring(0, NAME_LEN);
+}
+
+srvr.listen(9000);
+
+