jQuery ajax忽略500状态错误 [英] jquery ajax ignores 500 status error

问题描述

我正在向App Engine应用程序发出一些GET请求，并在Chrome中进行了测试.虽然我可以在javascript控制台中看到某些调用导致500服务器错误，但是尽管阅读了许多类似的SO线程，但我似乎还是找不到在jQuery代码中捕获此错误的方法.我了解它表示服务器端错误，但我仍然希望能够从我的JavaScript中捕获此类错误.

I'm making some GET requests to an App Engine app, testing in Chrome. Whilst I can see in javascript console that some calls result in a 500 server error, I can't seem to find anyway of capturing this error in my jQuery code despite reading a number of similar SO threads. I understand that it indicates a server side error, but I'd still like to be able to capture such an error from my javascript.

我需要捕获错误，以便我可以计算响应的数量(成功与否)，并在收到所有调用响应后触发另一个功能.

I need to capture the error so that I can count the number of responses (successful or otherwise) and trigger another function when all call responses have been received.

Chrome控制台输出:

Chrome console output:

GET http://myapp.com/api?callback=jQuery12345&params=restOfParams 500 (Internal Server Error)

我的电话:

  function makeCall() {
    var count = 0;
    var alldata = $('#inputset').val();
    var rows = alldata.split('\n');
    var countmatch = rows.length;
    for (i=0;i<rows.length;i++) {
      data["param"] = rows[i]["val"];
      $.ajax({
              url: apiUrl,
              type: 'GET',
              data: data,
              dataType: 'jsonp',
              error: function(){
                  alert('Error loading document');
                  count +=1;
              },
              success: function(responseJson) {
                            count +=1;
                            var res = responseJson.results;
                            if (count == countmatch) {
                              allDoneCallback(res);
                            }
                        },
             });
    }
}

我尝试了以下一些方法:
添加:

I've tried some of the following:
Adding:

statusCode: {500: function() {alert('err');}}

通话.

使用:

  $().ready(function(){
     $.ajaxSetup({
       error:function(x,e) {
             if(x.status==500) {
               alert('Internel Server Error.');
             }
           }
      });
   });

有人会对我如何获得500条回应提出建议吗?

Would anyone have a suggestion regarding how I could catch the 500 response?

谢谢 奥利(Oli)

更新:

基于响应，我的jquery代码似乎是正确的，但是由于某种原因，它只能捕获从我的应用收到的某些500个响应.这可能是App Engine如何返回错误(我对此不太了解)或jquery如何处理jsonp错误的问题-这一点在

Based on responses, my jquery code appears to be correct, but for some reason it would only catch certain 500 responses received from my app. This is possibly a problem with how App Engine returns the error(I don't know a lot about this), or how jquery handles errors with jsonp - this point is briefly discussed in the last paragraph of this article.

我通过使用 jquery-isonp 使它起作用，该捕获器捕获了应用程序.

I got this to work by using jquery-isonp which caught all of the 500 status's thrown by the app.

推荐答案

您似乎没有正确使用jQuery的document.ready绑定. $().ready(...)版本或多或少不推荐使用.尝试以下方法之一:

It doesn't look like you're using jQuery's document.ready binding correctly. The $().ready(...) version is more-or-less deprecated. Try one of these instead:

$(document).ready(function() {
    $.ajaxSetup({
        error: function(x, e) {
            if (x.status == 500) {
                alert('Internel Server Error.');
            }
        }
    });
});

或速记:

$(function() {
    $.ajaxSetup({
        error: function(x, e) {
            if (x.status == 500) {
                alert('Internel Server Error.');
            }
        }
    });
});

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