An extensible, high-performance web framework for Rust built on hyper, designed for concurrency and safety.
Iron is a high-level web framework for Rust that builds on the hyper HTTP library. It leverages Rust's type system and ownership model to create safe, concurrent web applications, focusing on extensibility through middleware, plugins, and modifiers to avoid bottlenecks in highly concurrent scenarios.
Rust developers building scalable, concurrent web servers or APIs who prioritize safety, extensibility, and performance. It suits those who need a flexible framework where core features are minimal and extended via plugins.
Developers choose Iron for its emphasis on extensibility and concurrency, using a 100% safe Rust codebase that eliminates undefined behavior. Its unique selling point is a modular architecture with simple systems for middleware, plugins, and modifiers, allowing custom extensions without locking or shared writes in the core.
An Extensible, Concurrent Web Framework for Rust
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Core functionality is kept minimal, with features added via middleware, plugins, and modifiers, allowing high customizability without framework modifications, as highlighted in the philosophy section.
Designed to avoid locking and shared writes, enabling scalability across threads or machines, with benchmarks showing over 72,000 requests per second for hello world.
Built with 100% safe Rust code and zero unsafe blocks, ensuring memory safety and eliminating undefined behavior, as verified in the README.
Simple systems for modifiers and plugins make third-party integrations seamless, allowing ergonomic manipulation of requests and responses.
No middleware or plugins are bundled, forcing developers to source and maintain third-party crates separately, which can lead to compatibility and maintenance issues.
The minimal core requires more configuration upfront for common web features, such as routing or authentication, increasing complexity for new users.
The README notes that due to Rust's rapid evolution, dependent extensions may not always build, adding maintenance overhead and potential breaking changes.