Dear researchers,
There are some Web sources which are accessed just by Web robots and human users are unaware of them. 'robots.txt' file is a good example of such sources which is practically used as an indicator for detecting Web robots.
I would be appreciative if you let me know what are other Web sources (like files) which are just accessed by Web robots and used as an indicator for these crawlers.
Polite web robots introduce themselves in the User Agent field.
You can search for substrings like 'bot', 'spider',
'crawler', 'slurp'.
https://en.wikipedia.org/wiki/User_agent
Rarely a robot tries to access a search page.
The robots tests whether a webpage has a search engine
and makes a GET request for something like
/search?...
Regards,
Joachim
There's a lot of meta data in html files. http://schema.org/ is somehow a standard. Every other social network service has their own meta tags: https://developers.facebook.com/docs/sharing/webmasters#markup or https://dev.twitter.com/cards/markup
CORS headers are used very javascript communication between different hosts.
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