package main

import (
	"bufio"
	"fmt"
	"io"
	"log"
	"net/textproto"
	"os"
	"regexp"
)

func main() {
	log.SetFlags(log.Lshortfile)
	log.SetPrefix(fmt.Sprintf(
		"[%s]:%s ", os.Getenv("TCPREMOTEIP"), os.Getenv("TCPREMOTEPORT"),
	))
	br := bufio.NewReaderSize(os.Stdin, 1<<10)
	tr := textproto.NewReader(br)
	q, err := tr.ReadLine()
	if err != nil {
		log.Fatalln(err)
	}
	if q == "" {
		q = "@"
	} else {
		re := regexp.MustCompile("^[a-z0-9-.]+$")
		if !re.MatchString(q) {
			log.Fatalln("bad query")
		}
	}
	fd, err := os.Open(q)
	if err != nil {
		log.Fatalln(err)
	}
	if _, err = io.Copy(os.Stdout, fd); err != nil {
		log.Fatalln(err)
	}
	log.Print(q)
}