无效的Json用法? [英] Invalid Json usages?

问题描述

有时我

Sometimes I see people send json to server as :

$.ajax({
url: ...
contentType: "application/json; charset=utf-8",
dataType: "json",
data: { 'page': '100AAAAAf00' },
responseType: "json",
success: ...,
error: ...
});

但是{ 'page': '100AAAAAf00' }不是 Json.

并说contentType是json ...

and were saying contentType is json ...

Json是文本表示形式.

Json is the text representation.

例如:"{ 'page': '100AAAAAf00' }"

我在这里想念什么吗? (jQuery是否在幕后进行某些翻译?)

Am I missing something here ? ( Does jQuery is doing some translations behind the scenes ?)

Wiki:

JSON或JavaScript对象表示法，是基于文本的(!!) 专为人类可读的数据交换而设计的开放标准.

JSON or JavaScript Object Notation, is a text-based (!!) open standard designed for human-readable data interchange.

推荐答案

$.ajax("/", {

    contentType: "application/json; charset=utf-8",
    dataType: "json",
    data: {
        'page': '100AAAAAf00'
    },
    type: 'POST',
    responseType: "json"

});

错.这将发送带有请求正文的普通application/x-www-form-urlencoded请求:

Is wrong. This will send a normal application/x-www-form-urlencoded request with the request body:

page=100AAAAAf00

但是，由于标头是"application/json; charset=utf-8"，因此实际上是位于服务器上.

But since the header is "application/json; charset=utf-8", it is actually lying to the server.

要使用jQuery将真实，纯净，真实的JSON发送到服务器，您将使用:

To send, real, pure, actual JSON to the server with jQuery, you would use:

$.ajax("/", {

    contentType: "application/json; charset=utf-8",
    dataType: "json",
    data: JSON.stringify({ //If data is string, jQuery will not try to process it
        'page': '100AAAAAf00'
    }),
    type: 'POST',
    responseType: "json"

});

现在请求正文将是:

{"page":"100AAAAAf00"}

并且完全不能与php的$_POST一起使用，因为它是基于application/x-www-form-urlencoded的， 所以也许这就是为什么人们更喜欢前者的原因.

And that cannot be used with php's $_POST at all since it works on the basis of application/x-www-form-urlencoded, so maybe that's why people prefer the former..

一个人可以使用开发人员工具中的Chrome的网络"标签在这里验证我的主张:

One can use Chrome's network tab in developer tools to verify my claims here:

http://jsfiddle.net/sV5m4/1/-带有json标头的实际json

http://jsfiddle.net/sV5m4/1/ - Actual json with json header

在这里:

http://jsfiddle.net/sV5m4/2/-x-www-form -urlencoded标有标为json的标头

http://jsfiddle.net/sV5m4/2/ - x-www-form-urlencoded with header that claims to be json

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