H2O (web server)
From Wikipedia, the free encyclopedia
H2O is a free and open-source web server. It is written in C, and is distributed under the terms of the MIT License.
Original authors
- Kazuho Oku
- DeNA
Initial releaseFebruary 18, 2015[1]
Stable release
2.2.6
/ August 13, 2019[2]
Written inC
| H2O | |
|---|---|
| Original authors |
|
| Initial release | February 18, 2015[1] |
| Stable release | 2.2.6
/ August 13, 2019[2] |
| Written in | C |
| Operating system | Unix-like |
| Type | Web server |
| License | MIT License |
| Website | h2o |
| Repository | |
It was designed with a focus on supporting HTTP/2 and TLS, maximizing the use of new web technologies such as prioritization and server push. As a result it achieves significantly better performance than conventional web servers such as nginx.[3]
Features
H2O has the following key features:[4]
- HTTP/1.0 and HTTP/1.1 support
- HTTP/2 support
- Full support for dependency and weight-based prioritization with server-side tweaks
- Cache-aware server push
- HTTP/3 support (experimental)
- TCP Fast Open
- TLS support
- Session resumption (standalone and memcached)
- Session tickets with automatic key rollover
- Automatic OCSP stapling
- Forward secrecy and fast AEAD cipher suite
- Private key protection using privilege separation
- Encrypted Client Hello (experimental)[5]
- Static file serving
- FastCGI support
- Reverse proxy
- Scripting using mruby (Rack-based)
- Graceful restart and self-upgrade
History
In July 2014, Kazuho Oku started development of H2O for usage as a server for mobile games while working at DeNA.[6] The initial version was released in December 2014, and the first stable version was released in February 2015 when the HTTP/2 specification was finalized.[7]
See also
- Fastly - The largest user of H2O in the world. Oku joined Fastly in January 2017.[citation needed]
.svg){kind=logo}
