first-commit

modules/log/event_writer_conn.go

@@ -0,0 +1,111 @@
+// Copyright 2023 The Gitea Authors. All rights reserved.
+// SPDX-License-Identifier: MIT
+
+package log
+
+import (
+	"io"
+	"net"
+)
+
+type WriterConnOption struct {
+	Addr           string
+	Protocol       string
+	Reconnect      bool
+	ReconnectOnMsg bool
+}
+
+type eventWriterConn struct {
+	*EventWriterBaseImpl
+	connWriter connWriter
+}
+
+var _ EventWriter = (*eventWriterConn)(nil)
+
+func NewEventWriterConn(writerName string, writerMode WriterMode) EventWriter {
+	w := &eventWriterConn{EventWriterBaseImpl: NewEventWriterBase(writerName, "conn", writerMode)}
+	opt := writerMode.WriterOption.(WriterConnOption)
+	w.connWriter = connWriter{
+		ReconnectOnMsg: opt.ReconnectOnMsg,
+		Reconnect:      opt.Reconnect,
+		Net:            opt.Protocol,
+		Addr:           opt.Addr,
+	}
+	w.OutputWriteCloser = &w.connWriter
+	return w
+}
+
+func init() {
+	RegisterEventWriter("conn", NewEventWriterConn)
+}
+
+// below is copied from old code
+
+type connWriter struct {
+	innerWriter io.WriteCloser
+
+	ReconnectOnMsg bool
+	Reconnect      bool
+	Net            string `json:"net"`
+	Addr           string `json:"addr"`
+}
+
+var _ io.WriteCloser = (*connWriter)(nil)
+
+// Close the inner writer
+func (i *connWriter) Close() error {
+	if i.innerWriter != nil {
+		return i.innerWriter.Close()
+	}
+	return nil
+}
+
+// Write the data to the connection
+func (i *connWriter) Write(p []byte) (int, error) {
+	if i.neededConnectOnMsg() {
+		if err := i.connect(); err != nil {
+			return 0, err
+		}
+	}
+
+	if i.ReconnectOnMsg {
+		defer i.innerWriter.Close()
+	}
+
+	return i.innerWriter.Write(p)
+}
+
+func (i *connWriter) neededConnectOnMsg() bool {
+	if i.Reconnect {
+		i.Reconnect = false
+		return true
+	}
+
+	if i.innerWriter == nil {
+		return true
+	}
+
+	return i.ReconnectOnMsg
+}
+
+func (i *connWriter) connect() error {
+	if i.innerWriter != nil {
+		_ = i.innerWriter.Close()
+		i.innerWriter = nil
+	}
+
+	conn, err := net.Dial(i.Net, i.Addr)
+	if err != nil {
+		return err
+	}
+
+	if tcpConn, ok := conn.(*net.TCPConn); ok {
+		err = tcpConn.SetKeepAlive(true)
+		if err != nil {
+			return err
+		}
+	}
+
+	i.innerWriter = conn
+	return nil
+}