Created
October 18, 2021 04:41
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fakeserver
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| package main | |
| import ( | |
| "flag" | |
| "fmt" | |
| "log" | |
| "net" | |
| ) | |
| var header = []byte("HTTP/1.1 200 OK\r\nConnection: close\r\n\r\n") | |
| var html = []byte(`<!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML 2.0//EN"> | |
| <html><head> | |
| <title>400 Bad Request</title> | |
| </head><body> | |
| <h1>Bad Request</h1> | |
| <p>Your browser sent a request that this server could not understand.<br /> | |
| Reason: You're speaking plain HTTP to an SSL-enabled server port.<br /> | |
| Instead use the HTTPS scheme to access this URL, please.<br /> | |
| </p> | |
| </body></html> | |
| `) | |
| func handleConnection(conn *net.TCPConn) { | |
| defer conn.Close() | |
| buf := make([]byte, 4*1024) | |
| for { | |
| n, err := conn.Read(buf) | |
| if err != nil { | |
| if ne, ok := err.(net.Error); ok { | |
| switch { | |
| case ne.Temporary(): | |
| continue | |
| } | |
| } | |
| log.Println("Read", err) | |
| return | |
| } | |
| if n > 0 { | |
| break | |
| } | |
| } | |
| log.Printf("%s %s", conn.RemoteAddr(), string(buf[0:7])) | |
| //conn.Write(header) | |
| _, err := conn.Write(html) | |
| if err != nil { | |
| log.Println("Write", err) | |
| return | |
| } | |
| return | |
| } | |
| func handleListener(l *net.TCPListener) error { | |
| defer l.Close() | |
| for { | |
| conn, err := l.AcceptTCP() | |
| if err != nil { | |
| if ne, ok := err.(net.Error); ok { | |
| if ne.Temporary() { | |
| log.Println("AcceptTCP", err) | |
| continue | |
| } | |
| } | |
| return err | |
| } | |
| go handleConnection(conn) | |
| } | |
| } | |
| func main() { | |
| port := flag.Uint("port", 12345, "port number to listen") | |
| flag.Parse() | |
| tcpAddr, err := net.ResolveTCPAddr("tcp", fmt.Sprintf("0.0.0.0:%d", *port)) | |
| if err != nil { | |
| log.Println("ResolveTCPAddr", err) | |
| return | |
| } | |
| l, err := net.ListenTCP("tcp", tcpAddr) | |
| if err != nil { | |
| log.Println("ListenTCP", err) | |
| return | |
| } | |
| err = handleListener(l) | |
| if err != nil { | |
| log.Println("handleListener", err) | |
| } | |
| } |
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