Facebook - 解析输入URL时出错，没有数据被缓存，或者没有数据被刮除 [英] Facebook - Error parsing input URL, no data was cached, or no data was scraped

问题描述

研究之后，我发现很多人面临同样的问题。但是到目前为止，我不解决这个问题，这是在我将服务器切换到linode.com之后发生的。

让我们举个例子。 www.acemark2u.com是在linode服务器下托管的网站之一，
当我尝试调试 https://developers.facebook.com/tools/debug/og/object/ ，它只是无法正确获取scrape信息，如果我尝试与页面之一www .acemark2u.com / about-us，它只显示错误解析输入URL时出错，没有数据被缓存，或没有数据被刮除。

奇怪的事情发生。当我尝试调试使用ip地址106.187.35.114/~acemark2一切顺利。抓取很好，页面没有错误404。

我怀疑它可能是由gethostbyaddr函数引起的（ref： http://www.gearhack.com/Forums/DisplayComments.php?file=Computer/Network/Internet/Preventing_Your_Web_Server_From_Blocking_Facebook_Share ）但到目前为止没有解决办法

解决方案

我最后找到了解决方案。

在我的默认DNS A / AAAA记录中，我没有删除这几个ip

  2400：8900 :: f03c：91ff：fe73：a95d默认
邮件2400：8900 :: f03c：91ff：fe73：a95d默认
 www 2400：8900 :: f03c：91ff：fe73 ：a95d默认
  

这就是为什么有些用户在通过适当的网页访问时会指向上述IP地址。

After research I found that alot of people facing the same issue. But so far I don't solution, this happened after I switch my server to linode.com

lets take an example. www.acemark2u.com is one of the website hosted under the linode server, when I try to debug in https://developers.facebook.com/tools/debug/og/object/, it just couldn't fetch the scrape information correctly, and if I try with one of the page www.acemark2u.com/about-us, it just show me the error "Error parsing input URL, no data was cached, or no data was scraped."

weird things happen. when I try to debug using ip address 106.187.35.114/~acemark2 everything goes smooth. fetching nicely, no error 404 for pages.

I suspect it might caused by "gethostbyaddr" function (ref: http://www.gearhack.com/Forums/DisplayComments.php?file=Computer/Network/Internet/Preventing_Your_Web_Server_From_Blocking_Facebook_Share) but so far I don't have solutions.

解决方案

i found the solution at last.

In my default DNS A/AAAA record i did not remove these few ip

2400:8900::f03c:91ff:fe73:a95d  Default
mail    2400:8900::f03c:91ff:fe73:a95d  Default
www 2400:8900::f03c:91ff:fe73:a95d  Default

that's why some of the users will pointed to the above IP when they access via proper web address.

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