Question 1

How to parse robots.txt in Rust using robotstxt?

Accepted Answer

Import the DefaultMatcher, load the robots.txt content as a string, and call one_agent_allowed_by_robots with the user agent and URL. The README provides a quick start example for basic usage.

Question 2

robotstxt vs robots-rs: which is better for Rust?

Accepted Answer

robotstxt is a direct port of Google's parser, ensuring accuracy with Google's interpretation, while robots-rs might offer a more Rust-native API or different features. Choose robotstxt for Google compatibility or robots-rs for potential ergonomic improvements.

Question 3

Does robotstxt support wildcards in robots.txt rules?

Accepted Answer

Yes, it implements the Robots Exclusion Protocol as per Google's library, which includes support for wildcards and pattern matching in directives like Disallow and Allow.

Question 4

Is robotstxt thread-safe for concurrent crawling?

Accepted Answer

The library uses safe Rust and should be thread-safe, but consult the documentation for specific concurrency guarantees, as it depends on internal implementation details.

Question 5

What version of Rust is required for robotstxt?

Accepted Answer

Check the Cargo.toml or crate documentation for minimum Rust version requirements; typically, it aligns with stable Rust releases, but verify for compatibility with your project.

Question 6

Can robotstxt handle large robots.txt files efficiently?

Accepted Answer

As a port of Google's optimized C++ code, it should perform well, but benchmark for your use case, as parsing overhead might scale with file size and complexity.

robotstxt

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