node-red-contrib-web-worldmap/node_modules/bufferlist/examples/binary.js

A Node-RED node to provide a web page of a world map for plotting things on.

#!/usr/bin/env node

var sys = require('sys');
var net = require('net');

var BufferList = require('bufferlist');
var Binary = require('bufferlist/binary');

function parser (sock) {
    var bufferList = new BufferList;
    sock.addListener('data', function (data) {
        bufferList.push(data);
    });
    
    return Binary(bufferList)
        .getWord16be('xLen')
        .when('xLen', 0, function (vars) {
            this
                .getWord32le('msgLen')
                .getBuffer('msg', 'msgLen')
                .tap(function (vars) {
                    vars.moo = 'msg:' + vars.msgLen + ':' + vars.msg;
                })
                .exit()
            ;
        })
        .getBuffer('xs', 'xLen')
        .tap(function (vars) {
            vars.moo = 'xs:' + vars.xLen + ':' + vars.xs;
        })
        .end()
    ;
}

function serverSession (port, strings) {
    // fire up a server to write the strings when a client connects
    var server = net.createServer(function (stream) {
        strings.forEach(function (s) {
            stream.write(s);
        });
        stream.end();
        server.close();
    });
    server.listen(port);
    
    // connect to the server and parse its output
    var client = new net.Stream;
    parser(client).addListener('end', function (vars) {
        sys.puts(vars.moo);
        client.end();
    });
    client.connect(port);
}

serverSession(20801, ['\x00','\x04m','eow']);
serverSession(20802, ['\x00\x00','\x12\x00\x00\x00happy pur','ring c','ats']);