h2o/h2o
H2o
h2o is a high-performance content delivery server and HTTP/3 web server. It functions as a network gateway and reverse proxy that forwards client requests to upstream servers to manage traffic flow and load.
The project distinguishes itself as a protocol fuzzing tool, utilizing a testing framework to execute automated stress tests against network protocols to identify memory leaks and crashes.
The server provides capabilities for secure web traffic management through encrypted data transmission and high-performance web serving across HTTP/1, HTTP/2, and HTTP/3. It includes tools for server resource optimization, such as CPU binding, response content compression, and performance monitoring via a telemetry system.
Features
- High-Performance HTTP Servers - Delivers web content and applications using optimized HTTP/1, HTTP/2, and HTTP/3 protocols for maximum speed and efficiency.
- Multi-Protocol Handlers - Handles HTTP/1, HTTP/2, and HTTP/3 requests through a shared internal representation for protocol-agnostic processing.
- HTTP Traffic Handling - Processes incoming requests using multiple protocol versions to deliver web content to end users efficiently.
- Reverse Proxies - Provides a network gateway that routes incoming web requests to backend servers while managing encryption and header forwarding.
- Upstream Proxy Relaying - Forwards client traffic to backend servers by maintaining a persistent connection pool and relaying responses.
- Network Connection Security - Encrypts network traffic using modern security standards to protect data moving between the client and the server.
- Traffic Encryption - Ensures secure data transmission between clients and servers using modern encrypted traffic standards.
- Event-Driven I/O - Uses a non-blocking event loop to manage thousands of concurrent network connections with minimal overhead.
- Request Relays - Forwards client requests to an upstream server and relays the response back to the client to manage traffic flow.
- High-Performance Web Services - Processes requests and sends responses using various network protocols to provide high-performance connectivity for web applications.
- HTTP Protocols - Handles requests and responses using various HTTP standards to ensure compatibility across all client browser versions.
- HTTP Servers - Delivers web content using a high-performance engine supporting HTTP/1, HTTP/2, and HTTP/3 protocols.
- Protocol Fuzzing - Implements a testing framework to identify crashes and memory leaks through automated stress tests against network protocols.
- CPU Affinity Binding - Implements CPU affinity binding to pin server threads to specific physical cores for reduced cache misses.
- Access Logs - Records detailed information about incoming requests and streams those logs to external destinations or unix sockets.
- Application-Level Probes - Exposes low-level event hooks for sockets and requests to monitor real-time server performance and resource usage.
- Resource Optimization - Optimizes hardware resource utilization through CPU binding and memory tuning for high-traffic network services.
- Web Server Performance Monitoring - Exposes low-level probes for socket and request events to track server behavior and resource usage in real-time.
- Interface Fuzzing - Identifies crashes and memory leaks by executing automated stress tests against various network protocol implementations.
- Incremental Body Processing - Processes incoming request data in small chunks to minimize memory footprints during large file uploads.
- Response Compression - Reduces outgoing payload sizes by passing response content through an extensible series of compression algorithms.
- Networking - Optimized HTTP server and library.
- Networking Libraries - High-performance HTTP server and library.
