问题
I have a site that has two versions, for one country A and for all of the rest, and is restricted by IP,
The thing is that from country A, if they share a URL in facebook (for example); when facebook tries to scan for title, description and image it fails (as actually should),
Is there a way to detect that is facebook/twitter/google IP and let them read it? (i understand that if the link is clicked outside country A or facebook it will fail)
回答1:
There's some info on the individual websites:
For Facebook Crawler address info, have a look at https://developers.facebook.com/docs/opengraph/howtos/maximizing-distribution-media-content#crawl
For Twitter, you can have a look here: https://dev.twitter.com/docs/cards/troubleshooting#Card_Validator
For Google, have a look here: https://support.google.com/webmasters/answer/80553?hl=en
来源：https://stackoverflow.com/questions/24693156/how-to-let-facebook-read-a-url-that-is-ip-restricted