问题
I am trying to share this url via facebook(change RANDOM_STRING with any random string because of facebook cache):
http://www.ikposta.com/blog/goster/72/test_RANDOM_STRING
at first try facebook will decide picture which is there is a men. Refresh facebook page and try again share with same url at this time picture will be changed and you will see keyboard image which is correct image.
og:image tag is always correct why this is happening ?
How can I prevent ?
回答1:
Run your URL through the Facebook Object Debugger to make sure that your OG image tag is correctly being picked up by Facebook. This will also force a re-cache of the image.
I ran it through quickly and there were a couple errors that came up. Primarily missing URL and title OG tags. You'll want to have these to avoid circular redirects. See here: Debugged
I would personally remove that cache bust all together. It's confusing Facebook because it looks like a directory. If anything, use a query string.
来源：https://stackoverflow.com/questions/21397703/facebook-sharer-cant-see-ogimage-tag-at-first-check