golang 高性能网络io框架 nbio

之前一直在用gnet，但是gnet有两个痛点：1、不支持tls/https 2、http和websocket的功能不完整。
因为主要是做api使用，所以第二点对我困扰并不大，但是第一点带来很多麻烦。
于是偶尔在v2ex看到 nbio的作者的自吹贴，详细看了他的测试结果，看了一部分源码后，觉得新的服务应该去尝试一下。

同时在tcp/tls基础上实现简易的http（单纯非必要不用完整http）

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go get github.com/lesismal/nbio@v1.3.19      

tcp ：https://github.com/lesismal/nbio-examples/blob/master/echo/server/server.go

# 简易http server

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package main

import (
	"bytes"
	"fmt"
	"strconv"
	"strings"

	"github.com/lesismal/nbio"
)

func main() {
	engine := nbio.NewEngine(nbio.Config{
		Network:            "tcp",
		Addrs:              []string{":8888"},
		MaxWriteBufferSize: 6 * 1024 * 1024,
	})

	engine.OnData(func(c *nbio.Conn, data []byte) {
		//封装http start
		joinLengthBytes := []byte(strings.Join([]string{strconv.Itoa(len(data)), "\r\n\r\n"}, ""))
		htmlList := [][]byte{
			[]byte("HTTP/1.1 200\r\nServer:fish-v5\r\nContent-Type:text/plain\r\nContent-Length:"),
			joinLengthBytes,
			data,
		}
		http_response := bytes.Join(htmlList, nil)
		c.Write(http_response)
		//封装http  end
		//c.Write(append([]byte{}, data...))
	})

	err := engine.Start()
	if err != nil {
		fmt.Printf("nbio.Start failed: %v\n", err)
		return
	}
	defer engine.Stop()

	<-make(chan int)
}

# 简易 https server

rsaCertPEM 和 rsaKeyPEM 可以用nginx格式的 .cer（至少需要第一段）和key,当然也支持 acme申请的证书

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package main

import (
	"bytes"
	"log"
	"strconv"
	"strings"

	"github.com/lesismal/llib/std/crypto/tls"
	"github.com/lesismal/nbio"
	ntls "github.com/lesismal/nbio/extension/tls"
)

func main() {
	cert, err := tls.X509KeyPair(rsaCertPEM, rsaKeyPEM)
	if err != nil {
		log.Fatalf("tls.X509KeyPair failed: %v", err)
	}
	tlsConfig := &tls.Config{
		Certificates:       []tls.Certificate{cert},
		InsecureSkipVerify: true,
	}

	g := nbio.NewGopher(nbio.Config{
		Network: "tcp",
		Addrs:   []string{":8888"},
	})
	isClient := false
	g.OnOpen(ntls.WrapOpen(tlsConfig, isClient, func(c *nbio.Conn, tlsConn *tls.Conn) {
		log.Println("OnOpen:", c.RemoteAddr().String())
	}))
	g.OnClose(ntls.WrapClose(func(c *nbio.Conn, tlsConn *tls.Conn, err error) {
		log.Println("OnClose:", c.RemoteAddr().String())
	}))
	g.OnData(ntls.WrapData(func(c *nbio.Conn, tlsConn *tls.Conn, data []byte) {
		log.Println("OnData:", c.RemoteAddr().String(), string(data))
		joinLengthBytes := []byte(strings.Join([]string{strconv.Itoa(len(data)), "\r\n\r\n"}, ""))
		htmlList := [][]byte{
			[]byte("HTTP/1.1 200\r\nServer:fish-v5\r\nContent-Type:text/plain\r\nContent-Length:"),
			joinLengthBytes,
			data,
		}
		http_response := bytes.Join(htmlList, nil)
		//c.Write(http_response)
		tlsConn.Write(http_response)
	}))

	err = g.Start()
	if err != nil {
		log.Fatalf("nbio.Start failed: %v\n", err)
		return
	}
	defer g.Stop()

	g.Wait()
}

var rsaCertPEM = []byte(`-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----
`)

var rsaKeyPEM = []byte(`-----BEGIN RSA PRIVATE KEY-----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-----END RSA PRIVATE KEY-----
`)