先寫一個可以接收post請求的伺服器：

package main

import (
	"fmt"
	"net/http"
)

func main() {
	http.HandleFunc("/postpage", func(w http.ResponseWriter, r *http.Request) {
		//接受post請求，然後打印表單中key和value欄位的值
		if r.Method == "POST" {
			var (
				key   string = r.PostFormValue("key")
				value string = r.PostFormValue("value")
			)
			fmt.Printf("key is  : %s\n", key)
			fmt.Printf("value is: %s\n", value)
		}
	})

	err := http.ListenAndServe(":80", nil)
	if err != nil {
		fmt.Println(err.Error())
		return
	}
}
 

然後我們使用net/http包來發送post請求：

package main

import (
	"fmt"
	"net/http"
	"net/url"
)

func main() {
	//這裡新增post的body內容
	data := make(url.Values)
	data["key"] = []string{"this is key"}
	data["value"] = []string{"this is value"}

	//把post表單傳送給目標伺服器
	res, err := http.PostForm("http://127.0.0.1/postpage", data)
	if err != nil {
		fmt.Println(err.Error())
		return
	}
	defer res.Body.Close()

	fmt.Println("post send success")
}
 

如果你不想用現成的包，那麼下面這段程式碼就是直接通過HTTP協議實現post請求，執行效果和上面這段程式碼一樣：

package main

import (
	"fmt"
	"net"
)

func main() {
	//因為post方法屬於HTTP協議，HTTP協議以TCP為基礎，所以先建立一個
	//TCP連線，通過這個TCP連線來發送我們的post請求
	conn, err := net.Dial("tcp", "127.0.0.1:80")
	if err != nil {
		fmt.Println(err.Error())
		return
	}
	defer conn.Close()

	//構造post請求
	var post string
	post += "POST /postpage HTTP/1.1\r\n"
	post += "Content-Type: application/x-www-form-urlencoded\r\n"
	post += "Content-Length: 37\r\n"
	post += "Connection: keep-alive\r\n"
	post += "Accept-Language: zh-CN,zh;q=0.8,en;q=0.6\r\n"
	post += "\r\n"
	post += "key=this is key&value=this is value\r\n"

	if _, err := conn.Write([]byte(post)); err != nil {
		fmt.Println(err.Error())
		return
	}
	fmt.Println("post send success.")
}
 

如果轉載請註明出處：http://blog.csdn.net/gophers/article/details/22870185