Facebook Oembed 响应不返回 Json

Question

我正在尝试从服务器端向 Facebook 的 Oembed 端点发出 Get 请求。当我在浏览器中访问 URL 时，它可以工作（单击此链接：https://www.facebook.com/plugins/video/oembed.json/?url=https%3A%2F%2Fwww.facebook.com%2Ffacebook%2Fvideos%2F10153231379946729%2F）

但是，当从服务器端进行调用时，响应不是 json 对象。

      static void Main(string[] args)
       {
           string uri2 = "https://www.facebook.com/plugins/video/oembed.json/?url=https%3A%2F%2Fwww.facebook.com%2Ffacebook%2Fvideos%2F10153231379946729%2F";

           CreateLinkRequest call2 = new CreateLinkRequest();
           call2 = Get<CreateLinkRequest>(uri2);
           Console.ReadLine();
       }


       public static T Get<T>(string uri)
       {
           HttpWebRequest request = (HttpWebRequest)WebRequest.Create(uri);
           request.AutomaticDecompression = DecompressionMethods.GZip | DecompressionMethods.Deflate;

           using (HttpWebResponse response = (HttpWebResponse)request.GetResponse())
           using (Stream stream = response.GetResponseStream())
           using (StreamReader reader = new StreamReader(stream))
           {
               string json = reader.ReadToEnd();
               Object result = new JavaScriptSerializer().Deserialize<T>(json);
               return (T)result;
           }
       }
   }

   public class CreateLinkRequest
   {

       public string provider_name { get; set; }
       public string author_name { get; set; }
       public string width { get; set; }
       public string author_url { get; set; }
       public string title { get; set; }
       public string type { get; set; }
       public string version { get; set; }
       public string thumbnail_width { get; set; }
       public string provider_url { get; set; }
       public string thumbnail_height { get; set; }
       public string html { get; set; }
       public int height { get; set; }
       public string thumbnail_url { get; set; }
   }

Answer 1

想通了，你在正确的道路上，但我必须在 HttPWebRequest 上设置 UserAgent 和 Refer 属性。我猜 Facebook 想确保你不是机器人

      public static T Get<T>(string uri)
       {
           HttpWebRequest request = (HttpWebRequest)WebRequest.Create(uri);
            request.UserAgent = "Mozilla / 5.0(Windows; U; WindowsNT 5.1; en - US; rv1.8.1.6) Gecko / 20070725 Firefox / 2.0.0.6";
            request.Referer = "http://www.google.com";
           request.AutomaticDecompression = DecompressionMethods.GZip | DecompressionMethods.Deflate;

           using (HttpWebResponse response = (HttpWebResponse)request.GetResponse())
           using (Stream stream = response.GetResponseStream())
           using (StreamReader reader = new StreamReader(stream))
           {
               string json = reader.ReadToEnd();
               Object result = new JavaScriptSerializer().Deserialize<T>(json);
               return (T)result;
           }
       }
   }