[go practical basis] how to verify request parameters in gin

Catalog

One 、 brief introduction

Two 、 Knowledge point

gin route

Structure

Structure parameter binding

Parameter validation

http Status code

3、 ... and 、 Rookie actual combat

1、 establish go file

 2、 Running results

（1）GET Method , Add routing parameters and callbacks outside the verification range

（2）GET Method , Add the route parameters and callbacks outside the verification range again

（3）GET Method , Add routing parameters and callbacks within the validation range

---

One 、 brief introduction

Actual combat scene : How to use gin Verify request parameters

Two 、 Knowledge point

• gin route

• Structure

• Structure parameter binding

• Parameter validation

• http Status code

3、 ... and 、 Rookie actual combat

Make arrangements now ！

1、 establish go file

/*
 * @Author:  Rookie actual combat 
 * @Description: gin  How to verify request parameters 
 */

//  Knowledge point :
// # gin  route 
// #  Structure 
// #  Structure parameter binding 
// #  Parameter validation 
// # http  Status code 

package main

//  Import package 
import (
	"fmt"
	"github.com/gin-gonic/gin"
	"net/http"
	"runtime"
)

//  Defining structure 
type Person struct {
	Name string `form:"name" binding:"required"`
	Age  int    `form:"age" binding:"required,gt=10"`
}

//  The main function 
func main() {
	//  Print using built-in functions 
	println("Hello", " Rookie actual combat ")
	println(" Actual combat scene : ", "gin  How to verify request parameters ")

	//  initialization 
	r := gin.Default()

	// GET  Method ,  Add routing parameters and callbacks 
	r.GET("/bind", testBind)
	r.POST("/bind", testBind)

	//  Use package functions to print 
	fmt.Printf(" edition : %s \n", runtime.Version())

	//  Start the framework program ,  Default  8080  port 
	r.Run()

}

//  Automatically parse data according to the structure definition 
func testBind(c *gin.Context) {
	var person Person

	//  Here is according to the request  header  Of  content-type  To do it  binding  operation 
	if err := c.ShouldBind(&person); err != nil {
		c.String(http.StatusInternalServerError, "person bind error %v \n", err)
	} else {
		c.String(http.StatusOK, "%v \n", person)
	}
}

// curl  Verification mode 
// bind get
// curl -X GET "http://127.0.0.1:8080/bind?a=1"
// curl -X GET "http://127.0.0.1:8080/bind?name=kitty&age=5"
// curl -X GET "http://127.0.0.1:8080/bind?name=kitty&age=21"

 2、 Running results

Hello Rookie actual combat

Actual combat scene : gin How to verify request parameters

[GIN-debug] Listening and serving HTTP on :8080

（1）GET Method , Add routing parameters and callbacks outside the verification range

（2）GET Method , Add the route parameters and callbacks outside the verification range again

（3）GET Method , Add routing parameters and callbacks within the validation range

  Rookie actual combat , Continuous learning !