Go Post/Get request&&data processing

[Go language programming notes (1)]

Go Post/Get request&&data processing

---

Preface

We know that in web services, post/get requests are usually used, but the corresponding requests are basically made through Postman.
Now that there is a business need, we make the request directly internally. How to do it? And how to process the obtained psot request data?

---

1. net/http

Get request[No nonsense, direct code]

package main

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

func main() {
    
    
	response, err := http.Get("http://www.baidu.com")
	if err != nil {
    
    
		// handle error
	}
	//程序在使用完回复后必须关闭回复的主体。
	defer response.Body.Close()

	body, _ := ioutil.ReadAll(response.Body)
	fmt.Println(string(body))
}

Post request[No nonsense, direct code]

package main

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

func main() {
    
    
	//body := "{\"action\":20}"
	body := "{\"BPM\":20}"

	res, err := http.Post("http://localhost:8080/", "application/json;charset=utf-8", bytes.NewBuffer([]byte(body)))
	if err != nil {
    
    
		fmt.Println("Fatal error ", err.Error())
	}

	defer res.Body.Close()

	content, err := ioutil.ReadAll(res.Body)
	if err != nil {
    
    
		fmt.Println("Fatal error ", err.Error())
	}

	fmt.Println(string(content))
}

Among them the content in body is actually the data you need to enter in postman:
Pay special attention to the escape character "" .

2. How to process the data obtained by Post? ?

1.string Convert ASCII to string

The code is as follows (example):

content, err := ioutil.ReadAll(res.Body)
fmt.Println(string(content))

2.json and struct data binding

The code is as follows (example):

type people struct {
    
    
    name string `json:"name"`
    age  int    `json:"age"`
    id   int    `json:"id"`
}

---

## json.Unmarshal packs string into json The code is as follows (example):

var someOne student
    if err := json.Unmarshal([]byte(msg), &someOne); err == nil {
    
    
        fmt.Println(someOne)
        fmt.Println(someOne.people)
    } else {
    
    
        fmt.Println(err)
    }

Summarize

The above is about how to convert Post data into json and bind it to struct, which is simple and efficient.