Adding a fake server for testing purpose

tools/fake-server.js

@@ -0,0 +1,69 @@
+const net = require('net');
+const util = require('util');
+const createBufferSegment = require('../src/common/bufferSegment');
+const TcpPackage = require('../src/systemData/tcpPackage');
+const TcpCommand = require('../src/systemData/tcpCommand');
+const TcpFlags = require('../src/systemData/tcpFlags');
+const ClientMessages = require('../src/messages/clientMessage');
+
+const server = net.createServer(function(socket) {
+  console.log('Connection from', socket.remoteAddress, socket.remotePort);
+  var recvBuf = new Buffer(0);
+  socket.on('data', function(buf) {
+    recvBuf = Buffer.concat([recvBuf, buf]);
+    const pkgData = tryReadPackage(recvBuf);
+    if (pkgData) {
+      handlePackage(pkgData, socket);
+      var oldBuf = recvBuf;
+      recvBuf = new Buffer(recvBuf.length - pkgData.size - 4);
+      oldBuf.copy(recvBuf, 0, 4 + pkgData.size);
+    }
+  });
+  socket.on('end', function() {
+    console.log('Connection closed');
+  })
+});
+server.listen(1113);
+
+function tryReadPackage(buf) {
+  if (buf.length < 4) return;
+  const size = buf.readInt32LE(0);
+  if (buf.length < (4 + size)) return;
+  const pkg = {
+    size: size,
+    data: new Buffer(size)
+  };
+  buf.copy(pkg.data, 0, 4, 4 + size);
+  return pkg;
+}
+
+function handlePackage(pkg, socket) {
+  const bs = createBufferSegment(pkg.data);
+  const tcpPkg = TcpPackage.fromBufferSegment(bs);
+  console.log('Received TcpPackage (cmd=%s, correlationId=%s, size=%d)', TcpCommand.getName(tcpPkg.command), tcpPkg.correlationId, tcpPkg.data.count);
+  switch(tcpPkg.command) {
+    case TcpCommand.IdentifyClient: {
+      const dto = new ClientMessages.ClientIdentified({});
+      const buf = dto.constructor.encode(dto).finish();
+      const sendPkg = new TcpPackage(TcpCommand.ClientIdentified, TcpFlags.None, tcpPkg.correlationId, null, null, createBufferSegment(buf));
+      const sendBuf = sendPkg.asBuffer();
+      const sizeBuf = new Buffer(4);
+      sizeBuf.writeInt32LE(sendBuf.length, 0);
+      socket.write(sizeBuf);
+      socket.write(sendBuf);
+      break;
+    }
+    case TcpCommand.HeartbeatRequestCommand: {
+      const sendPkg = new TcpPackage(TcpCommand.HeartbeatResponseCommand, TcpFlags.None, tcpPkg.correlationId, null, null);
+      const sendBuf = sendPkg.asBuffer();
+      const sizeBuf = new Buffer(4);
+      sizeBuf.writeInt32LE(sendBuf.length, 0);
+      socket.write(sizeBuf);
+      socket.write(sendBuf);
+      break;
+    }
+    default: {
+      console.log('Unhandled TcpPackage command \'%s\'', TcpCommand.getName(tcpPkg.command));
+    }
+  }
+}