Go使用net/http包调用远程http服务接口

• 2018-12-11
• 2667 View

Go Http客户端

get请求可以直接http.Get方法

package main

import (
	"fmt"
	"net/http"
	"log"
	"reflect"
	"bytes"
)

func main() {

	resp, err := http.Get("http://www.baidu.com")
	if err != nil {
		// handle error
		log.Println(err)
		return
	}

	defer resp.Body.Close()

	headers := resp.Header

	for k, v := range headers {
		fmt.Printf("k=%v, v=%v\n", k, v)
	}

	fmt.Printf("resp status %s,statusCode %d\n", resp.Status, resp.StatusCode)

	fmt.Printf("resp Proto %s\n", resp.Proto)

	fmt.Printf("resp content length %d\n", resp.ContentLength)

	fmt.Printf("resp transfer encoding %v\n", resp.TransferEncoding)

	fmt.Printf("resp Uncompressed %t\n", resp.Uncompressed)

	fmt.Println(reflect.TypeOf(resp.Body)) // *http.gzipReader

	buf := bytes.NewBuffer(make([]byte, 0, 512))

	length, _ := buf.ReadFrom(resp.Body)

	fmt.Println(len(buf.Bytes()))
	fmt.Println(length)
	fmt.Println(string(buf.Bytes()))
}

有时需要在请求的时候设置头参数、cookie之类的数据，就可以使用http.Do方法。

package main

import (
	"net/http"
	"strings"
	"fmt"
	"io/ioutil"
	"log"
	"encoding/json"
)

func main() {
	client := &http.Client{}

	req, err := http.NewRequest("POST", "http://www.maimaiche.com/loginRegister/login.do",
		strings.NewReader("mobile=xxxxxxxxx&isRemberPwd=1"))
	if err != nil {
		log.Println(err)
		return
	}

	req.Header.Set("Content-Type", "application/x-www-form-urlencoded; charset=UTF-8")

	resp, err := client.Do(req)

	defer resp.Body.Close()

	body, err := ioutil.ReadAll(resp.Body)
	if err != nil {
		log.Println(err)
		return
	}

	fmt.Println(resp.Header.Get("Content-Type")) //application/json;charset=UTF-8

	type Result struct {
		Msg    string
		Status string
		Obj    string
	}

	result := &Result{}
	json.Unmarshal(body, result) //解析json字符串

	if result.Status == "1" {
		fmt.Println(result.Msg)
	} else {
		fmt.Println("login error")
	}
	fmt.Println(result)
}

如果使用http POST方法可以直接使用http.Post 或 http.PostForm，

package main

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

func main() {
	resp, err := http.Post("http://www.maimaiche.com/loginRegister/login.do",
		"application/x-www-form-urlencoded",
		strings.NewReader("mobile=xxxxxxxxxx&isRemberPwd=1"))
	if err != nil {
		fmt.Println(err)
		return
	}

	defer resp.Body.Close()
	body, err := ioutil.ReadAll(resp.Body)
	if err != nil {
		fmt.Println(err)
		return
	}

	fmt.Println(string(body))
}

http.PostForm方法，

package main

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

func main() {

	postParam := url.Values{
		"mobile":      {"xxxxxx"},
		"isRemberPwd": {"1"},
	}

	resp, err := http.PostForm("http://www.maimaiche.com/loginRegister/login.do", postParam)
	if err != nil {
		fmt.Println(err)
		return
	}

	defer resp.Body.Close()
	body, err := ioutil.ReadAll(resp.Body)
	if err != nil {
		fmt.Println(err)
		return
	}

	fmt.Println(string(body))
}