tracing-bad-http-requests.go

tracing-bad-http-requests.go

package main

import (
	"bufio"
	"bytes"
	"fmt"
	"io"
	"net"
	"net/http"

	"github.com/alecthomas/repr"
)

func handleConnection(conn net.Conn) {

	memBuf := &bytes.Buffer{}
	multiReader := io.TeeReader(conn, memBuf)

	buf := bufio.NewReader(multiReader)

	req, err := http.ReadRequest(buf)
	defer conn.Close()

	if err == nil {
		fmt.Fprint(conn, "HTTP/1.1 200 OK\r\nContent-Length: 76\r\nContent-Type: text/plain; charset=utf-8\r\nDate: Wed, 19 Jul 1972 19:00:00 GMT\r\n\r\nGo is a general-purpose language designed with systems programming in mind.\n")
	} else {
		fmt.Println("***********************************************")
		fmt.Printf("Deu erro %s\n", err)
		fmt.Printf("Req:")
		repr.Print(req)
		fmt.Printf("\nBuffer capturado:")
		fmt.Println(memBuf.String())
		fmt.Println("***********************************************")
	}

}

func main() {
	ln, err := net.Listen("tcp", ":8888")
	if err != nil {
		fmt.Println("Deu merda!", err)
		// handle error
	}
	for {
		conn, err := ln.Accept()
		if err != nil {
			// handle error
		}
		go handleConnection(conn)
	}
}