go - 来自 PostForm 的 Gin Gonic 值数组

Question

我正在尝试使用 Go/Gin Gonic 从 HTML 表单中捕获一组 Post 值——在 PHP 中我会使用类似的东西:

<form method="POST" enctype="multipart/form-data" action="mygo">
 <input type=hidden name="emails[]" value="email1@email.com">
 <input type=hidden name="emails[]" value="email2@email.com">
 <input type=hidden name="emails[]" value="email3@email.com">
</form>

然而，这似乎不适用于 Gin Gonic(或 Go)。

我也试过:

<form method="POST" enctype="multipart/form-data" action="mygo">
 <input type=hidden name="emails" value="email1@email.com">
 <input type=hidden name="emails" value="email2@email.com">
 <input type=hidden name="emails" value="email3@email.com">
</form>

与其他地方一样，建议这样做会导致 c.PostForm("emails") 返回一个 slice 。但是在实践中，这似乎反而将最后一个值作为字符串返回:(

有趣的是，即使首先调用了 c.Request.ParseForm()，c.Request.PostForm 也会返回一个空映射。我做错了什么？

去表格:

func main() {
// ...
    router.POST("mygo",parseFunc)
}

func mygo(c *gin.Context) {
  c.Request.ParseForm()
  log.Printf("%v",c.Request.PostForm["emails"]) // ""
  log.Printf("%v",c.PostForm("emails") // "email3@email.com"
}

Answer 1

为了让它工作，你有两种方法

<form method="POST" enctype="multipart/form-data" action="mygo">
 <input type=hidden name="emails" value="email1@email.com">
 <input type=hidden name="emails" value="email2@email.com">
 <input type=hidden name="emails" value="email3@email.com">
</form>

r.POST("/", func(c *gin.Context) {
        c.Request.ParseMultipartForm(1000)
        for key, value := range c.Request.PostForm {
            fmt.Println(key,value)
        }
    })

要么

    <form method="POST" action="mygo">
     <input type=hidden name="emails" value="email1@email.com">
     <input type=hidden name="emails" value="email2@email.com">
     <input type=hidden name="emails" value="email3@email.com">
    </form>

 r.POST("/", func(c *gin.Context) {
            c.Request.ParseForm()
            for key, value := range c.Request.PostForm {
                fmt.Println(key,value)
            }
        })

两者给出相同的结果

emails [email1@email.com email2@email.com email3@email.com]