H2O is a new generation HTTP server that provides quicker response to users with less CPU, memory bandwidth utilization when compared to older generation of web servers.
Designed from ground-up, the server implements of HTTP/2 and HTTP/3 taking the advantages of features including new and old content prioritization schemes, server push, 103 Early Hints, promising outstanding experience to the visitors of the web site.
This is free and open source software.
Key Features
- HTTP/1.0, HTTP/1.1.
- HTTP/2:
- full support for dependency and weight-based prioritization with server-side tweaks.
- cache-aware server push.
- HTTP/3:
- full support for Extensible Priorities (RFC 9218).
- fusion AES-GCM engine for fast QUIC packet generation.
- TCP:
- TCP Fast Open.
- low latency tweaks.
- TLS
- session resumption (standalone & memcached).
- session tickets with automatic key rollover.
- automatic OCSP stapling.
- forward secrecy.
- zerocopy and hardware crypto offloading.
- private key protection using privilege separation with support for Intel QuickAssist Technology.
- static file serving.
- FastCGI.
- reverse proxy.
- scriptable using mruby (Rack-based).
- graceful restart and self-upgrade.
- BPF-based tracing tool (experimental).
Website: h2o.examp1e.net
Support: GitHub Code Repository
Developer: DeNA Co., Ltd.
License: MIT License
H2O is written in C. Learn C with our recommended free books and free tutorials.
Related Software
| Web Servers | |
|---|---|
| nginx | Very powerful and efficient web server powering the top web sites |
| Apache | Like nginx, Apache is a hugely popular web server |
| Caddy | Powerful, enterprise-ready web server written in Go |
| Lwan | Experimental, scalable, high performance HTTP server |
| H2O | Optimized HTTP/1.x, HTTP/2, HTTP/3 server |
| Tengine | Distribution of nginx |
| lighttpd | Fast, compliant and very flexible low memory footprint web server |
| Ferron | Web server optimized for speed, security and efficiency |
| CivetWeb | Small embeddable web server library written in C |
| Angie | Scalable web server that was forked from nginx |
| Algernon | Small self-contained pure-Go web server |
| Node.js | Server-side JavaScript environment for network applications |
| Yaws | High-performance web server written in Erlang |
| Hiawatha | Web server that focuses on security |
| OpenLiteSpeed | Lightweight HTTP server |
| rwasa | Full-featured high performance web server |
| devd | Local web server for developers |
| Cherokee | Fast, flexible and embeddable web server |
Read our verdict in the software roundup.
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