使用jQuery/AJAX和JSONP时没有响应

I am trying to make a cross-domain request using jQuery/AJAX. I have the following code;

我正在尝试使用jQuery/AJAX发出跨域请求。我有以下代码;

$.ajax({
   url: "http://www.cjihrig.com/development/jsonp/jsonp.php?callback=jsonpCallback&message=Hello",
   crossDomain:true
})
.done(function( msg ) {
  alert( "Done : " + msg );
})
.fail(function( msg) {
  alert( "Fail : " + msg);
})
.always(function( msg ) {
  alert( "Always : " + msg );
});

The URL http://www.cjihrig.com/development/jsonp/jsonp.php?callback=jsonpCallback&message=Hello returns JSON object when calling directly and works fine when using JSONP in traditional manner (i.e. through dynamic script tag injection)

URL http://www.cjihrig.com/development/jsonp/jsonp.php?当在传统的方式(例如通过动态脚本标记注入)使用JSONP时直接调用和工作时，Hello将返回JSON对象。

But why do I get an error when using it with jQuery/AJAX ?

但是为什么在使用jQuery/AJAX时会出现错误呢?

2 个解决方案

#1

Try this code because the error isn't set the dataType and isn't expect a jsonp default
dataType: (default: Intelligent Guess (xml, json, script, or html))
Type: String

尝试这段代码，因为错误没有设置数据类型，并且不期望jsonp默认数据类型:(默认:智能猜测(xml、json、脚本或html)类型:String

  $.ajax({
   url: "http://www.cjihrig.com/development/jsonp/jsonp.php?callback=jsonpCallback&message=Hello",
   dataType: 'jsonp',
   crossDomain:true,
    jsonp: false,
    success: jsonpCallback,
})
.done(function( msg ) {
  alert( "Done : " + msg );
})
.fail(function( msg) {
  alert( "Fail : " + msg);
})
.always(function( msg ) {
  alert( "Always : " + msg );
});

 function jsonpCallback(data){
        alert("jsonpCallback");
    }

DEMO

演示

#2

I would use $.ajax with the option:

我将使用美元。ajax选项:

dataType: "jsonp"

This automatcially adds the callback option to the url. http://api.jquery.com/jQuery.ajax/

这个自动向url添加回调选项。http://api.jquery.com/jQuery.ajax/

#1