jQuery的阿贾克斯返回＆QUOT; parsererror＆QUOT;尽管JSON是有效的，收益code是201 [英] jQuery Ajax returns "parsererror" despite JSON is valid and return code is 201

问题描述

我将查询发送到服务器，作为回报，等待一个JSON对象：

I'm sending a query to a server and awaiting a JSON object in return:

var a = $.ajax(
{
    type: "POST",
    data: post_data,
    timeout: 5000,
    url: url,
    beforeSend: function (xhr)
    {
        xhr.setRequestHeader("Content-Type", "application/json"); 
    }
})
.success (function (data, status, jqxhr)
{       
    onSuccess();
})
.error (function(x, status, jqxhr) 
{   
    onError_(x);
});

这完美的作品，我收到了预期的JSON的回报：

That works perfectly, I'm getting the expected JSON in return:

{"readyState":4,"responseText":"","status":201,"statusText":"Created"}

但不是的onSuccess（），但的onError _（）被调用和状态设置为parsererror尽管返回的是一个有效的JSON（我曾与各种工具，如的这个）和JSON元素，即使状态为 201 它根据的这个页面重新presents积极的状态code：

But not onSuccess() but onError_() gets called and status is set to 'parsererror' despite the return is a valid JSON (I've tested it with various tools like this) and even the status of the JSON element is 201 which according to this page represents a positive status code:

10.2.2 201创建

请求已经完成，并产生了一个新的资源被创造[...]

The request has been fulfilled and resulted in a new resource being created [...]

有没有可能，那jQuery的阿贾克斯跨$ P $点的201地位，作为一个失败？

Is it possible, that jQuery's Ajax interprets the 201 status as a failure?

更新：

还加入数据类型：JSON，来我的要求并没有改变的情况。 jQuery的文档阿贾克斯（）表示，

Also adding dataType: "json", to my request doesnt change the situation. The jQuery documentation for .ajax() says

的dataType （默认：智能猜测（XML，JSON，脚本或HTML））

dataType (default: Intelligent Guess (xml, json, script, or html))

所以，当我实现它，我认为jQuery的不会这么愚蠢导致错误，因为它不承认JSON和看来我是对的，因为错误是一样的。

So when I implemented it I thought jQuery wouldn't be so dumb to cause errors because it doesn't recognize JSON and it seems that I was right because the error remains the same.

更新：

有关此问题的常见的修复似乎是，加入数据类型：JSON的AJAX调用，但是这对我没有工作，所以我做了一个丑陋，但工作解决方法：

The common fix for this problem seems to be, adding dataType: "json" to the ajax call, however this didn't work for me, so I did an ugly but working workaround:

.error (function(x, status, jqxhr) 
{
    if (x.status == 201) /* jQuery thinks, Status 201 means error, but it doesnt so we have to work around it here */
    {
        // handle success
        return;
    }

    // handle errors
}

不管怎样，我会在适当的修复仍有兴趣

Anyway, I'd be still interested in a proper fix

推荐答案

注意：responseText的等于，这是不是一个有效的JSON。它应该是null或{}

Be careful: ResponseText is equal to "" and that is not a valid json. It should be null or "{}"

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