gin 表单参数

1、说明：

表单传输为post请求，http常见的传输格式为四种：
application/json
application/x-www-form-urlencoded
application/xml
multipart/form-data
表单参数可以通过PostForm()方法获取，该方法默认解析的是x-www-form-urlencoded或from-data格式的参数

2、实例代码

  <!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<title>Document</title>
</head>
  <body>
<form action="http://localhost:8080/form" method="post" action="application/x-www-form-urlencoded">
    用户名：<input type="text" name="username" placeholder="请输入你的用户名">  <br>
    密&nbsp;&nbsp;&nbsp;码：<input type="password" name="userpassword" placeholder="请输入你的密码">  <br>
    <input type="submit" value="提交">
</form>
  </body>
</html>

下面是gin 代码

  package main
  import (
"fmt"
"net/http"

"github.com/gin-gonic/gin"
)

  func main() {
      r := gin.Default()
      r.POST("/form", func(c *gin.Context) {
      types := c.DefaultPostForm("type", "post")
      username := c.PostForm("username")
      password := c.PostForm("userpassword")
    c.String(http.StatusOK, fmt.Sprintf("username:%s,password:%s,type:%s", username, password,types))
})
r.Run()
}