re2
Ruby bindings to RE2, a fast, safe, thread-friendly alternative to backtracking regex engines like PCRE.
What is re2?
re2 is a Ruby gem that provides bindings to Google's RE2 regular expression engine. It offers a safer alternative to Ruby's built-in Regexp by eliminating regular expression denial of service (ReDoS) vulnerabilities through guaranteed linear-time matching and configurable memory limits. The library maintains a familiar API with RE2::Regexp and RE2::MatchData classes while providing thread-safe operation.
Ruby developers who need to process regular expressions from untrusted sources or require guaranteed performance bounds to prevent ReDoS attacks. Particularly valuable for web applications, security tools, and systems processing user-generated regex patterns.
Developers choose re2 over Ruby's built-in Regexp for its security guarantees against ReDoS attacks, thread-safe design, and predictable linear-time performance. It's the go-to solution when safety and reliability with regular expressions are more important than supporting every PCRE syntactic feature.
Overview
Ruby bindings to RE2, a "fast, safe, thread-friendly alternative to backtracking regular expression engines like those used in PCRE, Perl, and Python".
Use Cases
Best For
- Processing regular expressions from untrusted user input
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