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GolangTraining
/
27_code-in-process
/
42_HTTP
/
02_http-server
/
i04_POST
/
main.go

package main

import (
	"bufio"
	"fmt"
	"io"
	"log"
	"net"
	"strings"
)

func handleConn(conn net.Conn) {
	defer conn.Close()
	scanner := bufio.NewScanner(conn)
	i := 0
	for scanner.Scan() {
		ln := scanner.Text()
		fmt.Println(ln)

		if i == 0 {
			method := strings.Fields(ln)[0]
			fmt.Println("METHOD", method)
		} else {
			// in headers now
			// when line is empty, header is done
			if ln == "" {
				break
			}
		}

		i++
	}

	// response
	body := `
<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title></title>
</head>
<body>
	<form method="POST">
		<input type="text" name="key" value="">
		<input type="submit">
	</form>
</body>
</html>
	`

	io.WriteString(conn, "HTTP/1.1 200 OK\r\n")
	fmt.Fprintf(conn, "Content-Length: %d\r\n", len(body))
	io.WriteString(conn, "\r\n")
	io.WriteString(conn, body)
}

func main() {
	server, err := net.Listen("tcp", ":9000")
	if err != nil {
		log.Fatalln(err.Error())
	}
	defer server.Close()

	for {
		conn, err := server.Accept()
		if err != nil {
			log.Fatalln(err.Error())
		}
		go handleConn(conn)
	}
}