mirror of
https://gitee.com/johng/gf.git
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91 lines
2.5 KiB
Go
91 lines
2.5 KiB
Go
// Copyright 2017 gf Author(https://gitee.com/johng/gf). All Rights Reserved.
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//
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// This Source Code Form is subject to the terms of the MIT License.
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// If a copy of the MIT was not distributed with this file,
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// You can obtain one at https://gitee.com/johng/gf.
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package gtcp
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import (
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"net"
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"time"
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)
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const (
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gDEFAULT_RETRY_INTERVAL = 100 // (毫秒)默认重试时间间隔
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gDEFAULT_READ_BUFFER_SIZE = 1024 // 默认数据读取缓冲区大小
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)
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type Retry struct {
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Count int // 重试次数
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Interval int // 重试间隔(毫秒)
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}
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// 常见的二进制数据校验方式，生成校验结果
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func Checksum(buffer []byte) uint32 {
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var checksum uint32
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for _, b := range buffer {
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checksum += uint32(b)
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}
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return checksum
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}
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// 创建原生TCP链接, addr地址格式形如：127.0.0.1:80
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func NewNetConn(addr string, timeout...int) (net.Conn, error) {
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if len(timeout) > 0 {
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return net.DialTimeout("tcp", addr, time.Duration(timeout[0]) * time.Millisecond)
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} else {
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return net.Dial("tcp", addr)
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}
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}
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// (面向短链接)发送数据
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func Send(addr string, data []byte, retry...Retry) error {
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conn, err := NewConn(addr)
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if err != nil {
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return err
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}
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defer conn.Close()
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return conn.Send(data, retry...)
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}
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// (面向短链接)发送数据并等待接收返回数据
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func SendRecv(addr string, data []byte, receive int, retry...Retry) ([]byte, error) {
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conn, err := NewConn(addr)
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if err != nil {
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return nil, err
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}
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defer conn.Close()
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return conn.SendRecv(data, receive, retry...)
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}
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// (面向短链接)带超时时间的数据发送
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func SendWithTimeout(addr string, data []byte, timeout time.Duration, retry...Retry) error {
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conn, err := NewConn(addr)
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if err != nil {
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return err
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}
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defer conn.Close()
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return conn.SendWithTimeout(data, timeout, retry...)
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}
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// (面向短链接)发送数据并等待接收返回数据(带返回超时等待时间)
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func SendRecvWithTimeout(addr string, data []byte, receive int, timeout time.Duration, retry...Retry) ([]byte, error) {
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conn, err := NewConn(addr)
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if err != nil {
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return nil, err
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}
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defer conn.Close()
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return conn.SendRecvWithTimeout(data, receive, timeout, retry...)
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}
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// 判断是否是超时错误
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func isTimeout(err error) bool {
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if err == nil {
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return false
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}
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if netErr, ok := err.(net.Error); ok && netErr.Timeout() {
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return true
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}
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return false
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} |