milter-experiment/main.go

package main

import (
	"bufio"
	"bytes"
	"encoding/binary"
	"encoding/hex"
	"os"
)

var (
	// Global logger for application wide logging. Not sure if this is a good pattern yet.
	logger Logger
)

func handleMtaConnection(clientConnection *bufio.ReadWriter) {
	buf := make([]byte, 4096)
	for {
		bytesRead, err := clientConnection.Read(buf)
		if err != nil {
			logger.Errorln("Error reading from clientConnection:", err.Error())
			break
		} else {
			logger.Infof("Read %d bytes from connection\n", bytesRead)
			logger.Debugf("Hexdump of bytes read:\n%s", hex.Dump(buf[0:bytesRead]))

			// First 4 Bytes will be some integer thing "length"
			// Let's parse that
			var packetLength uint32
			bytesReader := bytes.NewReader(buf[0:4])
			err := binary.Read(bytesReader, binary.BigEndian, &packetLength)
			if err != nil {
				logger.Errorln(err.Error())
			}
			logger.Debugf("Parsed length: %d\n", packetLength)
		}
	}
}

func main() {
	logger = NewLogger(os.Stdout, os.Stderr, DEBUG)
	runServer()
}