mirror of https://github.com/ouqiang/gocron
145 lines
3.8 KiB
Go
145 lines
3.8 KiB
Go
// Copyright (c) 2012 - Cloud Instruments Co., Ltd.
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//
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// All rights reserved.
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//
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are met:
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//
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// 1. Redistributions of source code must retain the above copyright notice, this
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// list of conditions and the following disclaimer.
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// 2. Redistributions in binary form must reproduce the above copyright notice,
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// this list of conditions and the following disclaimer in the documentation
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// and/or other materials provided with the distribution.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
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// ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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// WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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// DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
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// ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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// (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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// LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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// ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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// SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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package seelog
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import (
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"crypto/tls"
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"fmt"
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"io"
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"net"
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)
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// connWriter is used to write to a stream-oriented network connection.
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type connWriter struct {
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innerWriter io.WriteCloser
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reconnectOnMsg bool
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reconnect bool
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net string
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addr string
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useTLS bool
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configTLS *tls.Config
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}
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// Creates writer to the address addr on the network netName.
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// Connection will be opened on each write if reconnectOnMsg = true
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func NewConnWriter(netName string, addr string, reconnectOnMsg bool) *connWriter {
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newWriter := new(connWriter)
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newWriter.net = netName
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newWriter.addr = addr
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newWriter.reconnectOnMsg = reconnectOnMsg
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return newWriter
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}
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// Creates a writer that uses SSL/TLS
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func newTLSWriter(netName string, addr string, reconnectOnMsg bool, config *tls.Config) *connWriter {
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newWriter := new(connWriter)
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newWriter.net = netName
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newWriter.addr = addr
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newWriter.reconnectOnMsg = reconnectOnMsg
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newWriter.useTLS = true
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newWriter.configTLS = config
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return newWriter
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}
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func (connWriter *connWriter) Close() error {
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if connWriter.innerWriter == nil {
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return nil
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}
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return connWriter.innerWriter.Close()
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}
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func (connWriter *connWriter) Write(bytes []byte) (n int, err error) {
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if connWriter.neededConnectOnMsg() {
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err = connWriter.connect()
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if err != nil {
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return 0, err
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}
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}
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if connWriter.reconnectOnMsg {
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defer connWriter.innerWriter.Close()
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}
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n, err = connWriter.innerWriter.Write(bytes)
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if err != nil {
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connWriter.reconnect = true
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}
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return
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}
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func (connWriter *connWriter) String() string {
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return fmt.Sprintf("Conn writer: [%s, %s, %v]", connWriter.net, connWriter.addr, connWriter.reconnectOnMsg)
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}
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func (connWriter *connWriter) connect() error {
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if connWriter.innerWriter != nil {
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connWriter.innerWriter.Close()
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connWriter.innerWriter = nil
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}
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if connWriter.useTLS {
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conn, err := tls.Dial(connWriter.net, connWriter.addr, connWriter.configTLS)
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if err != nil {
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return err
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}
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connWriter.innerWriter = conn
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return nil
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}
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conn, err := net.Dial(connWriter.net, connWriter.addr)
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if err != nil {
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return err
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}
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tcpConn, ok := conn.(*net.TCPConn)
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if ok {
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tcpConn.SetKeepAlive(true)
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}
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connWriter.innerWriter = conn
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return nil
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}
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func (connWriter *connWriter) neededConnectOnMsg() bool {
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if connWriter.reconnect {
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connWriter.reconnect = false
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return true
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}
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if connWriter.innerWriter == nil {
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return true
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}
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return connWriter.reconnectOnMsg
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}
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