This is the Linux app named RobotsTxt whose latest release can be downloaded as robotstxtsourcecode.tar.gz. It can be run online in the free hosting provider OnWorks for workstations.
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RobotsTxt
DESCRIPTION
This is a high-performance, production-tested library for parsing and evaluating robots.txt rules against crawler user agents. It implements the core semantics of the Robots Exclusion Protocol: user-agent sections, Allow/Disallow directives, wildcard handling, and precedence rules. The code is optimized for speed and low memory so large crawls can evaluate millions of URLs quickly. It also focuses on correctness—edge cases like overlapping patterns and longest-match resolution are handled consistently. Consumers integrate it to decide whether a specific URL may be fetched by a particular bot name and to respect crawl-delay or sitemaps hints where applicable. The library serves both search-scale crawlers and smaller tools that need a reliable decision engine for polite crawling.
Features
- Fast parser and matcher for Allow/Disallow rules
- Correct handling of wildcards and longest-match precedence
- User-agent specific rule sections with sensible fallbacks
- Low-overhead evaluation for high-throughput crawlers
- Support for common extensions like Sitemap hints
- Clear API to check URL fetch permissions per bot name
Programming Language
C++
Categories
This is an application that can also be fetched from https://sourceforge.net/projects/robotstxt.mirror/. It has been hosted in OnWorks in order to be run online in an easiest way from one of our free Operative Systems.
