[Go]net/HTTP封包

HTTP伺服器端

package main

import (
	"net/http"
)

type Refer struct {
	handler http.Handler
	refer   string
}

//實現中介軟體邏輯​
func (this *Refer) ServeHTTP(w http.ResponseWriter, r *http.Request) {
	if r.Referer() == this.refer {
		this.handler.ServeHTTP(w, r)
	} else {
		w.WriteHeader(403)
	}
}

//事件處理​
func myHandler(w http.ResponseWriter, r *http.Request) {
	w.Write([]byte("this is handler"))
}

func hello(w http.ResponseWriter, r *http.Request) {
	w.Write([]byte("hello"))
}

func main() {
	referer := &Refer{
		handler: http.HandlerFunc(myHandler),//註冊路由
		refer:   "www.xxx.com",
	}
	http.HandleFunc("/hello", hello)//註冊路由
	http.ListenAndServe(":8080", referer)//開啟監聽
}

HTTPS伺服器端

創建憑證

//在終端機輸入底下代碼
openssl req -newkey ras:2048 -nodes -keyout server.key -x509 -days 365 -out server.crt

package main

import (
"log"
"net/http"
)

func main() {
// 啟動伺服器
srv := &http.Server{Addr: ":8088", Handler: http.HandlerFunc(handle)}
// 用TLS啟動伺服器，因為我們執行的是http/2，它必須是與TLS一起運作。
log.Printf("Serving on https://0.0.0.0:8088")
log.Fatal(srv.ListenAndServeTLS("server.crt", "server.key"))
}

//處理器方法
func handle(w http.ResponseWriter, r *http.Request) {
// 記錄請求協定
log.Printf("Got connection: %s", r.Proto)
// 向客戶發送一則訊息
w.Write([]byte("Hello this is a HTTP/2 message!"))
}

用戶端

GET

package main

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

func main() {
	resp, err := http.Get("https://www.xxx.com")
	if err != nil {
		fmt.Print("err", err)
	}
	closer := resp.Body
	bytes, err := ioutil.ReadAll(closer)
	fmt.Println(string(bytes))
}

DELETE

package main

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

func main() {
	url := "http://www.xxx.com/comment/add"
	payload := strings.NewReader("{\"userId\":1,\"articleId\":1,\"comment\":\"xxxx\"}")
	req, _ := http.NewRequest("DELETE", url, payload)
	req.Header.Add("Content-Type", "application/json")
	res, _ := http.DefaultClient.Do(req)

	defer res.Body.Close()
	body, _ := ioutil.ReadAll(res.Body)

	fmt.Println(res)
	fmt.Println(string(body))
}

POST

package main

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

func main() {
	url := "http://www.xxx.com/comment/add"
	body := "{\"userId\":1,\"articleId\":1,\"comment\":\"xxx\"}"
	response, err := http.Post(url, "•application/x-www-form-urlencoded", bytes.NewBuffer([]byte(body)))
	if err != nil {
		fmt.Println("err", err)
	}
	b, err := ioutil.ReadAll(response.Body)
	fmt.Println(string(b))
}

PUT

package main

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

func main() {
	url := "http://www.xxx.com/comment/add"
	payload := strings.NewReader("{\"userId\":1,\"articleId\":1,\"comment\":\"xxx\"}")
	req, _ := http.NewRequest("PUT", url, payload)
	req.Header.Add("Content-Type", "application/json")
	res, _ := http.DefaultClient.Do(req)

	defer res.Body.Close()
	body, _ := ioutil.ReadAll(res.Body)

	fmt.Println(res)
	fmt.Println(string(body))
}

自定義header

headers := http.Header{"token": {"46r6ttyfy67fy"}}
headers.Add("Accept-Charset", "UTF-8")
headers.Set("Host", "www.xxx.com")
headers.Set("Location", "www.xxx.com")