mirror of https://github.com/tidwall/tile38.git
107 lines
2.4 KiB
Go
107 lines
2.4 KiB
Go
package server
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import (
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"bufio"
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"bytes"
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"errors"
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"fmt"
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"io"
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"net"
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"strings"
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"github.com/tidwall/tile38/client"
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"github.com/tidwall/tile38/controller/log"
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"github.com/tidwall/tile38/core"
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)
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var errCloseHTTP = errors.New("close http")
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// ListenAndServe starts a tile38 server at the specified address.
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func ListenAndServe(
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host string, port int,
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handler func(command []byte, conn net.Conn, rd *bufio.Reader, w io.Writer, websocket bool) error,
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) error {
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ln, err := net.Listen("tcp", fmt.Sprintf("%s:%d", host, port))
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if err != nil {
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return err
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}
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log.Infof("The server is now ready to accept connections on port %d", port)
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for {
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conn, err := ln.Accept()
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if err != nil {
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log.Error(err)
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continue
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}
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go handleConn(conn, handler)
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}
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}
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func handleConn(
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conn net.Conn,
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handler func(command []byte, conn net.Conn, rd *bufio.Reader, w io.Writer, websocket bool) error,
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) {
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if core.ShowDebugMessages {
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addr := conn.RemoteAddr().String()
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log.Debugf("opened connection: %s", addr)
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defer func() {
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log.Debugf("closed connection: %s", addr)
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}()
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}
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defer conn.Close()
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rd := bufio.NewReader(conn)
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for i := 0; ; i++ {
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err := func() error {
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command, proto, err := client.ReadMessage(rd, conn)
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if err != nil {
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return err
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}
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if len(command) > 0 && (command[0] == 'Q' || command[0] == 'q') && strings.ToLower(string(command)) == "quit" {
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return io.EOF
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}
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var b bytes.Buffer
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if err := handler(command, conn, rd, &b, proto == client.WebSocket); err != nil {
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if proto == client.HTTP {
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conn.Write([]byte(`HTTP/1.1 500 ` + err.Error() + "\r\nConnection: close\r\n\r\n"))
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}
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return err
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}
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switch proto {
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case client.Native:
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if err := client.WriteMessage(conn, b.Bytes()); err != nil {
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return err
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}
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case client.HTTP:
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if err := client.WriteHTTP(conn, b.Bytes()); err != nil {
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return err
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}
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return errCloseHTTP
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case client.WebSocket:
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if err := client.WriteWebSocket(conn, b.Bytes()); err != nil {
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return err
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}
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if _, err := conn.Write([]byte{137, 0}); err != nil {
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return err
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}
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return errCloseHTTP
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default:
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b.WriteString("\r\n")
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if _, err := conn.Write(b.Bytes()); err != nil {
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return err
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}
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}
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return nil
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}()
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if err != nil {
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if err == io.EOF {
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return
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}
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if err == errCloseHTTP ||
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strings.Contains(err.Error(), "use of closed network connection") {
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return
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}
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log.Error(err)
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return
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}
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}
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}
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