Ajax调用到外部URL [英] Ajax call to external URL

问题描述

我正在尝试从我的个人Duolingo帐户访问一个或两个数据属性.当输入以下URL时，将返回一个JSON对象: http://www.duolingo.com/users/username (我已替换了我的ID网址中带有用户名").

I am trying to access on or two data attributes from my personal Duolingo account. When punching in the following URL a JSON object is returned: http://www.duolingo.com/users/username (I've replaced my id with "username" in the url).

var getDuolingoData = function() {

    return $.ajax({
        type: "get",
        url: "http://www.duolingo.com/users/daniel692007&callback=?",
        dataType: "json"
    });

}

getDuolingoData().then(function(json) {

    console.log(json.site_streak); // this log is causing the error

});

但是，当我尝试从返回的对象中记录密钥时，将以下错误记录到控制台:

When I try and log a key from the returned object, however, the following error is logged to the console:

未捕获到的SyntaxError:意外令牌<

Uncaught SyntaxError: Unexpected token <

Ajax对我来说还很陌生，Duolingo没有我所知道的API，并且由于这是一个外部URL，我相信由于CORS，dataType必须设置为jsonp.

Ajax is fairly new to me, Duolingo don't have an API that I know of and as this is an external URL I believe the dataType must be set to jsonp due to CORS.

是否有明显的原因导致我无法访问访问指定URL时可以看到的JSON对象?

Is there an obvious reason that I am not able to access the JSON object I can see when visiting the specified URL?

TY

推荐答案

我遇到了同样的问题.我无法使用jsonp解决它.我最终要做的是在控制器中进行操作，该控制器从外部URL接收json并将其发送到ajax调用.

The same issue happened to me. I was unable to solve it using jsonp. What i ended up doing was to make an action in the controller that recieved the json from external url and send it to the ajax call.

例如

return $.ajax({
        type: "post",
        url: "/ActionInProject/ProjectController",
    });

然后，在Controller中，无论使用哪种服务器端语言，它都将有所不同.对我来说是C#，所以我做了

then in the Controller it will be different for whichever server side language is being used. For me it was C# so i did something like

[HttpPost]
public JsonResult ActionInProject()
{
   using(HttpClient client = new HttpClient())
   {
      var response = client.GetAsync("someothersite.com/api/link");
      return Json(client.GetAsync());
   }
}

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