exports.handler = async (event,context,callback) => {
  // console.log('Received event:', JSON.stringify(event, null, 2));
  var key=event.queryStringParameters.ref;
  // console.log('index.handler started with key : '+key);
  var RemoteServer='aaa.bbb.ccc.ddd';
  var net = require('net');
  var responce={
      "statusCode": 200,
      "headers": {
          "Content-Type": "*/*"
      }
  };

  var socket = new net.Socket();

  socket.setEncoding('utf8');

  socket.on('close', () => {
    console.log('Close.');
    console.log(JSON.stringify(responce));
    callback(null, JSON.stringify(responce));

  });
  socket.on('connect', () => {
    // console.log('Connect');
    var senddata='1,'+key;
    // console.log(('About to write :'+senddata));
    socket.write(senddata);
    console.log(('Wrote :'+senddata));
  });
  socket.on('data', (data) => {
    console.log('Data.');
    responce.body = data;
    console.log(JSON.stringify(responce));
    socket.end();
  });
  socket.on('end', () => {
    console.log('End.');
    console.log(JSON.stringify(responce));
  });
  socket.on('error', (error) => {
    console.log('Error' + error);
    socket.destroy;
    callback(error);
  });
  socket.on('timeout', () => {
    console.log('Timeout');
    socket.close;
    callback('Timeout');
  });

  socket.connect(11010, RemoteServer, () => {
    // console.log('socket connect');
  });

  callback(null,responce); // This is here to get this to do anything.
};

START RequestId: 7e1876fe-4255-12de-56d6-c187bcfff9ee Version: $LATEST
Wrote :1,R9H39X
Data.
{"statusCode":200,"headers":{"Content-Type":"*/*"},"body":"<?xml version="1.0" encoding="utf-8"?>rn<group>rn  <data>rn    <name>COLIN MANNING</name>rn    <from>26/03/2018</from>rn    <to>31/05/2018</to>rn    <room>A31</room>rn    <location>X,Y</location>rn  </data>rn</group>rn"}
End.
{"statusCode":200,"headers":{"Content-Type":"*/*"},"body":"<?xml version="1.0" encoding="utf-8"?>rn<group>rn  <data>rn    <name>COLIN MANNING</name>rn    <from>26/03/2018</from>rn    <to>31/05/2018</to>rn    <room>A31</room>rn    <location>X,Y</location>rn  </data>rn</group>rn"}
Close.
{"statusCode":200,"headers":{"Content-Type":"*/*"},"body":"<?xml version="1.0" encoding="utf-8"?>rn<group>rn  <data>rn    <name>COLIN MANNING</name>rn    <from>26/03/2018</from>rn    <to>31/05/2018</to>rn    <room>A31</room>rn    <location>X,Y</location>rn  </data>rn</group>rn"}
END RequestId: 7e1876fe-4255-12de-56d6-c187bcfff9ee
REPORT RequestId: 7e1876fe-4255-12de-56d6-c187bcfff9ee    Duration: 178.76 ms     Billed Duration: 200 ms Memory Size: 1536 MB    Max Memory Used: 33 MB

{"statusCode":200,"headers":{"Content-Type":"*/*"}}

START RequestId: c3dc7e69-87aa-1608-76d4-093a0e28711b Version: $LATEST
END RequestId: c3dc7e69-87aa-1608-76d4-093a0e28711b
REPORT RequestId: c3dc7e69-87aa-1608-76d4-093a0e28711b    Duration: 3.43 ms       Billed Duration: 100 ms Memory Size: 1536 MB    Max Memory Used: 33 MB

null