Question

I have a form that gets submitted to the server via jQuery .ajax() POST. If the form passed the validation on the server-side, the server would return result in HTML for the client-end to update its presentation accordingly. If, however, the form failed the validation, the server would return result in JSON, which consists of the validation errors.

两种结果将在<代码>>上填入.ajax()。由于这两种类型都是可能的,手工艺者需要一种方法来确定其结果是否为超文本或初才。我如何能够这样做?

Note: On the surface, my question looks like the same as this existing SO question but they are not the same. In that question, there s only one possible datatype (HTML or JSON), while my problem is about finding a way to deal with two possible datatypes (HTML and JSON).

Answer 1

For json data, typeof(data) will be object. For html data it will be string.

At least with data returned from ASP.NET MVC3 actions it works. I assume that it is the mime type that decides how jquery handles the returned data.

Answer 2

如果你离开<代码>数据类型参数空白,j Query将根据监测和评价系统类型确定:

dataTypeString

Default: Guelliess (xml, json, script, or html)

您从服务器中回收的数据类型。如果未具体说明,则j Query将试图根据监评小组的答复类型加以推断。

参看:。

Answer 3

用户类型将报告您处理的数据类型。

http://jsfiddle.net/adeneo/8VWq8/“rel=”nofollow> FIDDLE

Answer 4

<>如果你100%地确信你正在喂养你的 j鱼是恶意的XSS攻击的清洗,那么你就能够利用 Java贝的代谢(eval(>)。

感谢 @SLaks ,;a recommendation to swap out that nasty eval( 我使用过。

您可使用<条码>$.parseJSON,将原体文字改为JSON物体

function ajaxResponse(raw_data){
  try{
    // eval("var response="+raw_data); // try and avoid this if possible
    var response = $.parseJSON(raw_data);
    if (response){
      // We have a JSON inside the  response  variable!
    }
  } catch(e){
    // We do not have a JSON.
    // Probably HTML content.
    // Might be a malformed JSON.
  }
}

如该守则所述,如果你通过一个听觉的JSON物体,那么你的回响将把它看作是超文本。

注:<代码>数据页: 1

We all love alternatives that make our life a little bit easier - here is one for your situation.
Why not always return a JSON object? Something like this perhaps :

{"err":"","html":"<div>foobar</div>"}

错误:

{"err":"1","message":"You did not foo all of your bars yet!"}

Answer 5

为什么不只利用JSON返回超文本?

我通常做的是确定我返回的逊尼派目标,如:

{
  //s=status, d=data
  "s":0, //0 means success, other numbers are for different errors
  "d":{ /* Other JSON object or string here */ }
}

因此,就你而言,你就是这样做的:

if (StuffIsValid()) {
    ResponseWrite( {"s":0,"d":"<html>html code here</html>"} );
} else {
    ResponseWrite( {"s":1,"d":{"errlist":["err1","err2"]}} );
}

当然,你希望利用已建的JSON图书馆作为你选择的服务器边语言,而不是使用插座。

然后,在您的格文中success。背靠背,我将检查点值。

$.ajax({
    url:  url ,
    dataType:  json ,
    success: function(data) {
        if (data) {
            //We have a JSON object
            if (data.s === 0) {
                //Success!
                //Do stuff with data.d as a string
            } else if (data.s === 1) {
                //Failed validation
                //Do stuff with data.d as an object
            } else {
                //How did this happen?
            }
        } else {
            //Uh oh, no object, user must have been logged out (or something)
        }
    });

如果用户必须登上你重新登出的网页,这尤其有用,因为你可以发现,所交数据为JSON物体。

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