我想利用必应API给拉了回来拼写建议，但不断收到以下错误：

XMLHtt prequest无法加载的http://api.search.live.net/json.aspx?Appid=myIdWasHere&query=explotion&sources=spell.产地的http：// myWebServerNameWasHere 不受访问控制 - 允许 - 原产地允许

我看了几个帖子，看起来差不多的话大约CORS，但我还是有点模糊。我有什么错在下面的code？

  $。阿贾克斯（{
  键入：GET，
  网址：http://api.search.live.net/json.aspx，
  数据类型：JSON，
  数据： {
        APPID：'＆LT; myIdWasHere＆GT;'，
        查询：explotion，
        来源：拼
        }，
  beforeSend：功能（XHR）{
         xhr.setRequestHeader（访问控制 - 允许 - 起源，*）;
    }，
  成功：功能（数据）{
    警报（数据）;
    }，
  错误：函数（MSG）{
    警报（this.url +-failed））;
  }
}）;
 

解决方案

CORS（http://www.w3.org/TR/cors/）是制造使用XmlHtt prequest跨域请求一个新望路。因为你正在从你的域api.search.live.net的请求时，它被认为是一个跨域请求。 CORS需要服务器端的支持才能工作;具体而言，冰需要包括一个特殊标头，指示跨域请求是允许的。

我的猜测是，必应API不允许跨域请求。为了提出一个要求是，应考虑使用JSON-P（http://en.wikipedia.org/wiki/JSON#JSONP）。从他们的文档，它看起来像冰不支持JSON-P。查阅回调枚举示例部分在这里：

http://msdn.microsoft.com/en-us/library/ dd250846.aspx

I'm trying to utilize the Bing API to pull back spelling suggestions, but keep getting the below error:

XMLHttpRequest cannot load http://api.search.live.net/json.aspx?Appid=myIdWasHere&query=explotion&sources=spell. Origin http://myWebServerNameWasHere is not allowed by Access-Control-Allow-Origin

I read a couple posts that looked similar, then about CORS, but I'm still a bit fuzzy. What do I have wrong in the below code?

$.ajax({
  type: 'GET',
  url: 'http://api.search.live.net/json.aspx',
  dataType: 'json',
  data: {
        Appid: '<myIdWasHere>',
        query: 'explotion',
        sources: 'spell'
        },
  beforeSend: function(xhr){
         xhr.setRequestHeader("Access-Control-Allow-Origin", "*");
    }, 
  success: function(data) {    
    alert(data);
    },
  error: function(msg) {    
    alert(this.url + " -Failed"));
  }
});  

CORS (http://www.w3.org/TR/cors/) is a newish way of making cross-domain requests using XmlHttpRequest. Since you are making a request from your domain to api.search.live.net, it is considered a cross-domain request. CORS requires server-side support in order to work; specifically, Bing needs to include a special header that indicates that cross-domain requests are allowed.

My guess is that the Bing API does not allow cross-domain requests. In order to make a request, you should instead look into using JSON-P (http://en.wikipedia.org/wiki/JSON#JSONP). From their documentation, it looks like Bing does support JSON-P. Check out the "Callback Enumeration Example" section here:

http://msdn.microsoft.com/en-us/library/dd250846.aspx