检查用户机是否可以访问Facebook

问题描述

Facebook在我们国家被禁止。不过，仍有大量用户可以随时使用Facebook。当然，还有很多人不能。我的网站使用Facebook像按钮和盒子。如果用户机器无法访问Facebook，页面上将会出现一些丑的部分，应该有Facebook插件。

有谁知道如何解决这个问题？我的意思是如何检查用户机器是否可以访问Facebook？

解决方案

我通过使用Facebook API设法实现了这一点。只需启动一个查询，并调用FB.XFBML.parse（）;当查询完成时。

 < script type =text / javascript> 
 window.fbAsyncInit = function（）{
 FB.init（{
 appId：'app id'，
 status：false，
 cookie：true，
 xfbml：false，
 oauth：false 
}）; 
 FB.api（{
 method：'fql.query'，
 query：'SELECT uid，name FROM user WHERE uid = 1234'
}，
 function （response）{
 if（response [0] .uid =='1234'）{//现在用户可以连接到Facebook 
 FB.XFBML.parse（）; 
} 
}）; 
}; 
（function（）{
 var e = document.createElement（'script'）; 
 e.src = document.location.protocol +'//connect.facebook.net/en_US/ all.js'; 
 e.async = true; 
 document.getElementById（'fb-root'）。appendChild（e）; 
}（））; 
< / script> 
  

Facebook is banned in our country. However there are still a considerable amount of users who can work around to use Facebook. Of course, many others can't. My site uses Facebook like button and like box. If the user machine cannot access Facebook, there will be some "ugly" parts on the page, where there should be Facebook plugin.

Does anyone know how to resolve this issue? I mean how to check if the user machine can access Facebook? Any trick is appreciated.

解决方案

I managed to achieve this by using Facebook API. Just initiate a query, and call FB.XFBML.parse(); when the query completes.

<script type="text/javascript">
 window.fbAsyncInit = function () {
 FB.init({
 appId: 'app id',
 status: false,
 cookie: true,
 xfbml: false,
 oauth: false
 });
 FB.api({
 method: 'fql.query',
 query: 'SELECT uid,name FROM user WHERE uid=1234'
 },
 function (response) {
 if (response[0].uid == '1234') { // Now that the user can connect to facebook
 FB.XFBML.parse();
 }
 });
 };
 (function() {
 var e = document.createElement('script');
 e.src = document.location.protocol + '//connect.facebook.net/en_US/all.js';
 e.async = true;
 document.getElementById('fb-root').appendChild(e);
 }());
</script>

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