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server.go
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server.go
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package main
import (
"bytes"
"fmt"
"io"
"net"
"os"
"strings"
)
const (
CONN_HOST = "localhost"
CONN_PORT = "3334"
CONN_TYPE = "tcp"
BUFFER_LENGTH = 1024
)
func main() {
l, err := net.Listen(CONN_TYPE, fmt.Sprintf("%s:%s", CONN_HOST, CONN_PORT))
if err != nil {
fmt.Println(fmt.Sprintf(
"ERROR: Failed to register port at %s:%s message is %s",
CONN_HOST,
CONN_PORT,
err.Error()))
os.Exit(1)
}
defer l.Close()
fmt.Println(fmt.Sprintf("ECHO server running on %s:%s. Have fun!", CONN_HOST, CONN_PORT))
for {
conn, err := l.Accept()
if err != nil {
fmt.Println("ERROR accepting: ", err.Error())
os.Exit(1)
}
go handleRequest(conn)
}
}
// Handles incoming requests.
func handleRequest(conn net.Conn) {
for {
var buffer bytes.Buffer
buf := make([]byte, BUFFER_LENGTH)
for {
length, err := conn.Read(buf)
if err != nil && err != io.EOF{
fmt.Println("Server read error: ", err)
os.Exit(1)
}else if err != io.EOF {
buffer.Write(buf[0:length])
if length != BUFFER_LENGTH - 1{
break
}
}
}
var value = strings.TrimSpace(buffer.String())
if value == "exit" {
fmt.Fprint(conn, "Bye bye!!!\n")
break
}else{
fmt.Fprint(conn, value + " ..... right back at you!\n")
}
}
conn.Close()
}