javascript 如何在 jQuery getJSON 调用中捕获 400 响应
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How to catch a 400 response in jQuery getJSON call
提问by Muhammad Usman
In jQuery I want to fetch some data from facebook using the $.getJSON()
method, but if the token is invalid, Facebook is returning the 400 status. How I can catch the error in $.getJSON()
instead of $.ajax()
?
在 jQuery 中,我想使用该$.getJSON()
方法从 Facebook 获取一些数据,但如果令牌无效,Facebook 将返回 400 状态。我如何才能捕获错误$.getJSON()
而不是$.ajax()
?
回答by Elby
I think this will work for you
我认为这对你有用
$.getJSON("example.json", function() {
alert("success");
})
.success(function() { alert("success 2"); })
.error(function() { alert("error occurred "); })
.complete(function() { alert("Done"); });
回答by A.M. D.
The jquery Ajax docsoffer two solutions, the first is the error function:
jquery Ajax 文档提供了两种解决方案,第一种是错误函数:
error(jqXHR, textStatus, errorThrown)
which detects and reports textual portions of error messages for you, the other is the status code feature (on the same page). Here's the example usage from that page:
它为您检测并报告错误消息的文本部分,另一个是状态代码功能(在同一页面上)。这是该页面的示例用法:
$.ajax({
statusCode: {
404: function() {
alert("page not found");
}
}
});
回答by Varun Achar
Use the complete(jqXHR, textStatus)
function callback and investigate the response and show the approprite message to the user.
使用complete(jqXHR, textStatus)
函数回调并调查响应并向用户显示适当的消息。