golang简单tls协议用法完整示例

openssl genrsa -out key.pem 2048

openssl req -new -x509 -key key.pem -out cert.pem -days 3650

package main
import (
    "io"
    "net/http"
    "log"
)
func HelloServer(w http.ResponseWriter, req *http.Request) {
    io.WriteString(w, "hello, world!\n")
}
func main() {
    http.HandleFunc("/hello", HelloServer)
    err := http.ListenAndServeTLS(":8080", "cert.pem", "key.pem", nil)
    if err != nil {
        log.Fatal("ListenAndServe: ", err)
    }
}

package main
import (
    "log"
    "crypto/tls"
    "net"
    "bufio"
)
func main() {
    log.SetFlags(log.Lshortfile)
    cer, err := tls.LoadX509KeyPair("cert.pem", "key.pem")
    if err != nil {
        log.Println(err)
        return
    }
    config := &tls.Config{Certificates: []tls.Certificate{cer}}
    ln, err := tls.Listen("tcp", ":8000", config)
    if err != nil {
        log.Println(err)
        return
    }
    defer ln.Close()
    for {
        conn, err := ln.Accept()
        if err != nil {
            log.Println(err)
            continue
        }
        go handleConnection(conn)
    }
}
func handleConnection(conn net.Conn) {
    defer conn.Close()
    r := bufio.NewReader(conn)
    for {
        msg, err := r.ReadString('\n')
        if err != nil {
            log.Println(err)
            return
        }
        println(msg)
        n, err := conn.Write([]byte("world\n"))
        if err != nil {
            log.Println(n, err)
            return
        }
    }
}

package main
import (
    "log"
    "crypto/tls"
)
func main() {
    log.SetFlags(log.Lshortfile)
    conf := &tls.Config{
        InsecureSkipVerify: true,
    }
    conn, err := tls.Dial("tcp", "127.0.0.1:8000", conf)
    if err != nil {
        log.Println(err)
        return
    }
    defer conn.Close()
    n, err := conn.Write([]byte("hello\n"))
    if err != nil {
        log.Println(n, err)
        return
    }
    buf := make([]byte, 100)
    n, err = conn.Read(buf)
    if err != nil {
        log.Println(n, err)
        return
    }
    println(string(buf[:n]))
}