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Are user agents case sensitive?
The user-agent line identifies which crawler rules apply to. The value of the user-agent line is case-insensitive.
What is user-agent in robots txt?
User-agent in robots. txt. Each search engine should identify themself with a user-agent . Google’s robots identify as Googlebot for example, Yahoo’s robots as Slurp and Bing’s robot as BingBot and so on. The user-agent record defines the start of a group of directives.
What does User Agent * Disallow mean?
From this page: The “User-agent: *” means this section applies to all robots. The “Disallow: /” tells the robot that it should not visit any pages on the site.
Are there user agent tokens for robots.txt?
This list of user agent tokens is by no means exhaustive, so to learn more about some of the crawlers out there, take a look at the documentation published by Google, Bing, Yandex, Baidu, Facebook and Twitter. The matching of a user agent token to a robots.txt block is not case sensitive.
How are user agent directives separated in robots.txt?
Within a robots.txt file, each set of user-agent directives appear as a discrete set, separated by a line break: In a robots.txt file with multiple user-agent directives, each disallow or allow rule only applies to the useragent(s) specified in that particular line break-separated set.
What are case sensitive rules in robots.txt?
It’s worth noting that robots.txt rules are case sensitive, meaning that if you disallow URLs with the parameter “ search ” (e.g. “ Disallow: *?search= ”), robots might still crawl URLs with different capitalisation, such as “ ?Search=anything ”. The directive rules match against URL paths only, and can’t include a protocol or hostname.
Which is an example of a robots.txt file?
Here are a few examples of robots.txt in action for a www.example.com site: Using this syntax in a robots.txt file would tell all web crawlers not to crawl any pages on www.example.com, including the homepage. Using this syntax in a robots.txt file tells web crawlers to crawl all pages on www.example.com, including the homepage.