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Some pages of blogspot.com do not contain open graph tags, but Facebook Object Debugger still parse the open graph properties correctly. How does it get the open graph information?
For example, I don't see any open graph meta tag in http://sushiwens.blogspot.com/ source code. But it is correctly parsed by facebook https://developers.facebook.com/tools/debug/og/object?q=http%3A%2F%2Fsushiwens.blogspot.com%2F
I need to implement something like the open graph parsing function in python, so I need to know how to do it.