Form绑定

其实本质是将c中的request中的body数据解析到form中。

1. 方法一

package main

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

type Login struct {
	User     string `form:"username" json:"user" uri:"user" xml:"user"  binding:"required"`
	Password string `form:"password" json:"password" uri:"password" xml:"password" binding:"required"`
}

func main() {
	router := gin.Default()
	// Form 绑定普通表单的例子
	// Example for binding a HTML form (user=hanru&password=hanru123)
	router.POST("/loginForm", func(c *gin.Context) {
		var form Login
		//方法一：对于FORM数据直接使用Bind函数, 默认使用使用form格式解析,if c.Bind(&form) == nil
		// 根据请求头中 content-type 自动推断.
		if err := c.Bind(&form); err != nil {
			c.JSON(http.StatusBadRequest, gin.H{"error": err.Error()})
			return
		}

		if form.User != "hanru" || form.Password != "hanru123" {
			c.JSON(http.StatusUnauthorized, gin.H{"status": "unauthorized"})
			return
		}

		c.JSON(http.StatusOK, gin.H{"status": "you are logged in"})
	})

	router.Run(":8080")
}

2. 方法二

package main

import (
	"github.com/gin-gonic/gin"
	"github.com/gin-gonic/gin/binding"
)

type Login struct {
	User     string `form:"username" json:"user" uri:"user" xml:"user"  binding:"required"`
	Password string `form:"password" json:"password" uri:"password" xml:"password" binding:"required"`
}

func main() {
	router := gin.Default()
	router.POST("/login", func(c *gin.Context) {
		var form Login
		//方法二: 使用BindWith函数,如果你明确知道数据的类型
		// 你可以显式声明来绑定多媒体表单：
		// c.BindWith(&form, binding.Form)
		// 或者使用自动推断:
		if c.BindWith(&form, binding.Form) == nil {
			if form.User == "hanru" && form.Password == "hanru123" {
				c.JSON(200, gin.H{"status": "you are logged in ..... "})
			} else {
				c.JSON(401, gin.H{"status": "unauthorized"})
			}
		}
	})

	router.Run(":8080")
}