package main

import (
 "log"
 "net/http"
 "time"
)

func main() {
 // 創(chuàng)建路由器
 mux := http.NewServeMux()
 // 設(shè)置路由規(guī)則
 mux.HandleFunc("/hello", sayHello)

 // 創(chuàng)建服務(wù)器
 server := &http.Server{
  Addr:         ":1210",
  WriteTimeout: time.Second * 3,
  Handler:      mux,
 }

 // 監(jiān)聽端口并提供服務(wù)
 log.Println("starting httpserver at http:localhost:1210")
 log.Fatal(server.ListenAndServe())
}

func sayHello(w http.ResponseWriter, r *http.Request) {
 time.Sleep(1 * time.Second)
 w.Write([]byte("hello hello, this is httpserver"))
}

$ go run demo/base/http/server/server.go
2021/05/31 22:26:35 starting httpserver at http:localhost:1210

$ curl -v http://localhost:1210/hello

* Trying ::1:1210...
* Connected to localhost (::1) port 1210 (#0)
> GET /hello HTTP/1.1
> Host: localhost:1210
> User-Agent: curl/7.69.1
> Accept: */*
>
* Mark bundle as not supporting multiuse
< HTTP/1.1 200 OK
< Date: Mon, 31 May 2021 14:28:28 GMT
< Content-Length: 31
< Content-Type: text/plain; charset=utf-8
<
* Connection #0 to host localhost left intact

hello hello, this is httpserver

package main

import (
 "fmt"
 "io/ioutil"
 "net"
 "net/http"
 "time"
)

func main() {
 // 創(chuàng)建連擊池
 transport := &http.Transport{
  DialContext: (&net.Dialer{
   Timeout:   30 * time.Second,
   KeepAlive: 30 * time.Second,
  }).DialContext,
  MaxIdleConns:          100,              // 最大空閑連接數(shù)
  IdleConnTimeout:       90 * time.Second, // 空閑超時(shí)時(shí)間
  TLSHandshakeTimeout:   10 * time.Second, // tls 握手超時(shí)時(shí)間
  ExpectContinueTimeout: 1 * time.Second,  // 100-continue狀態(tài)碼超時(shí)時(shí)間
 }

 // 創(chuàng)建客戶端
 client := &http.Client{
  Transport: transport,
  Timeout:   30 * time.Second, // 沒餓
 }

 // 請(qǐng)求數(shù)據(jù)
 resp, err := client.Get("http://localhost:1210/hello")

 if err != nil {
  panic(err)
 }
 defer resp.Body.Close()

 // 讀取數(shù)據(jù)
 bds, err := ioutil.ReadAll(resp.Body)
 if err != nil {
  panic(err)
 }
 fmt.Println(string(bds))
}