| Original author(s) | Tatsuhiro Tsujikawa |
|---|---|
| Stable release | 1.52.0 / 2023-02-13 |
| Repository | |
| Written in | C |
| Platform | macOS, Windows, POSIX |
| Type | HTTP/2 implementation |
| License | MIT License |
| Website | nghttp2 |
nghttp2 is a C library. It is an implementation of HTTP/2.
nghttp2 was created by Tatsuhiro Tsujikawa as a derivative of spdylay, an implementation of SPDY, a communications protocol created by Google in 2009, in C. [1] [2]
Several well-known projects use nghttp2 to implement HTTP/2, including Apache and cURL. [3] [4]
nghttp2 will send a WINDOW_UPDATE frame upon consuming more than half of the flow control window. For instance, if the sender specifies the SETTINGS_INITIAL_WINDOW_SIZE[ sic ] as 65,535 octets in the SETTINGS frame, nghttp2 will send a WINDOW_UPDATE frame upon exceeding 32,768 octets. The initial window size may be changed using the -w and -W flags. [5]
nghttp2 offers multiple tools. nghttp is a command-line tool that uses nghttp2 to output HTTP/2 messages from a URL. [6] nghttp's dependency-based priority is based on Firefox; when a connection is established, nghttp sends five PRIORITY frames. [7] Other tools provided include nghttpd, an HTTP/2 server, nghttpx, an HTTP/2 proxy, h2load, an HTTP/2 load testing tool, and inflatehd and deflatehd, tools to decompress and compress using the HPACK header compression algorithm. [8]
nghttp3 is an implementation of HTTP/3 in C and authored by Tsujikawa. nghttp3 uses the QUIC network protocol designed by Jim Roskind at Google. [9]
The Dynamic Host Configuration Protocol (DHCP) is a network management protocol used on Internet Protocol (IP) networks for automatically assigning IP addresses and other communication parameters to devices connected to the network using a client–server architecture.
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