Go实现发送解析GET与POST请求

参考链接：

https://www.jb51.net/article/115693.htm

https://www.jb51.net/article/60900.htm

https://www.cnblogs.com/5bug/p/8494953.html

1、服务器解析GET请求，返回值为文本格式

package main

import (
	"log"
	"net/http"
)

func checkToken(w http.ResponseWriter, r *http.Request) {
	r.ParseForm()
	if r.Form["token"][0] == "chending123" {
		w.WriteHeader(http.StatusOK)
		w.Write([]byte("验证成功！"))
	} else {
		w.WriteHeader(http.StatusNotFound)
		w.Write([]byte("验证失败！"))
	}
}

func main() {
	http.HandleFunc("/user/check", checkToken)
	er := http.ListenAndServe("localhost:9090", nil)
	if er != nil {
		log.Fatal("ListenAndServe: ", er)
	}
}

2、返回值为json格式

package main

import (
    "log"
    "net/http"
    "encoding/json"
)

func checkToken(w http.ResponseWriter, r *http.Request) {
    r.ParseForm()

    var result ResponseJson

    if r.Form["token"][] == "chending123" {
        w.WriteHeader(http.StatusOK)
        result.Data = "chending"
        result.Message = "验证成功！"
    } else {
        w.WriteHeader(http.StatusNotFound)
        result.Message = "验证失败！"
    }

    bytes, _ := json.Marshal(result)
    w.Write(bytes)
}

func main() {
    http.HandleFunc("/user/check", checkToken)
    er := http.ListenAndServe("localhost:9090", nil)
    if er != nil {
        log.Fatal("ListenAndServe: ", er)
    }
}

type ResponseJson struct {
    Data    string
    Message string
} 

3、解析POST请求与解析GET请求方法一致，POST格式为x-www-form-urlencoded

默认地，表单数据会编码为 "application/x-www-form-urlencoded"

4、GET请求样式

http://localhost:9090/user/check?token=chending123

http://localhost:9090/user/confirm?user=chending&pass=123456

5、POST请求样式

http://localhost:9090/user/confirm

以application/json格式发送数据

{

　　“user”: "chending",

　　"pass": "123456"

}

6、Go的GET发送

代码如下:
package main
import (
        "fmt"
        "net/url"
        "net/http"
        "io/ioutil"
        "log"
)
func main() {
        u, _ := url.Parse("http://localhost:9001/xiaoyue")
        q := u.Query()
        q.Set("username", "user")
        q.Set("password", "passwd")
        u.RawQuery = q.Encode()
        res, err := http.Get(u.String());
        if err != nil {
              log.Fatal(err) return
        }
        result, err := ioutil.ReadAll(res.Body)
        res.Body.Close()
        if err != nil {
              log.Fatal(err) return
        }
        fmt.Printf("%s", result)
}

7、Go的POST发送

package main
import (
        "fmt"
        "net/url"
        "net/http"
        "io/ioutil"
        "log"
        "bytes"
        "encoding/json"
)
type Server struct {
        ServerName string
        ServerIP   string
}
type Serverslice struct {
        Servers []Server
        ServersID  string
}
func main() {
        var s Serverslice
        var newServer Server;
        newServer.ServerName = "Guangzhou_VPN";
        newServer.ServerIP = "127.0.0.1"
        s.Servers = append(s.Servers, newServer)
        s.Servers = append(s.Servers, Server{ServerName: "Shanghai_VPN", ServerIP: "127.0.0.2"})
        s.Servers = append(s.Servers, Server{ServerName: "Beijing_VPN", ServerIP: "127.0.0.3"})
        s.ServersID = "team1"
        b, err := json.Marshal(s)
        if err != nil {
                fmt.Println("json err:", err)
        }
        body := bytes.NewBuffer([]byte(b))
        res,err := http.Post("http://localhost:9001/xiaoyue", "application/json;charset=utf-8", body)
        if err != nil {
                log.Fatal(err)
                return
        }
        result, err := ioutil.ReadAll(res.Body)
        res.Body.Close()
        if err != nil {
                log.Fatal(err)
                return
        }
        fmt.Printf("%s", result)
}

8、GET设置请求头

    client := &http.Client{}
    url := "http://localhost:9090/tokenconfirm"

    reqest, err := http.NewRequest("GET", url, nil)

    reqest.Header.Set("Content-Type", "application/json")
    reqest.Header.Add("AccessToken", token)

    if err != nil {
        panic(err)
    }   

    res, err := client.Do(reqest)  

    defer res.Body.Close()

    jsonStr, err := ioutil.ReadAll(res.Body)

    if err != nil {
        log.Fatal(err)
    }