nghttp2
{{Lowercase title}}
{{Short description|HTTP/2 library in C}}
{{Infobox software
| title = nghttp2
| name = nghttp2
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| author = Tatsuhiro Tsujikawa
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| released = 2013
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| latest release version = {{wikidata|property|preferred|references|edit|P348|P548=Q2804309}}
| latest release date = {{Start date and age|{{wikidata|qualifier|preferred|single|P348|P548=Q2804309|P577}}|df=yes}}
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| programming language = C
| platform = macOS, Windows, POSIX
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| genre = HTTP/2 implementation
| license = MIT License
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| website = {{URL|https://nghttp2.org/}}
| repo = {{URL|https://github.com/nghttp2/nghttp2}}
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History
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.{{sfn|Pollard|2019|p=18}}{{Cite web |url=https://nghttp2.org/documentation/package_README.html |title=nghttp2 - HTTP/2 C Library |publisher=nghttp2 |access-date=March 19, 2023}}
Several well-known projects use nghttp2 to implement HTTP/2, including Apache and cURL.{{sfn|Pollard|2019|p=347}}{{sfn|Ludin|Garza|2017|p=112}}
Features
= HTTP/2 implementation=
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.{{sfn|Pollard|2019|p=233}}
= Tools =
nghttp2 offers multiple tools. nghttp is a command-line tool that uses nghttp2 to output HTTP/2 messages from a URL.{{sfn|Pollard|2019|p=116}} nghttp's dependency-based priority is based on Firefox; when a connection is established, nghttp sends five PRIORITY frames.{{sfn|Pollard|2019|p=128}} 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.{{sfn|Ludin|Garza|2017|p=110}}
= nghttp3 =
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.{{Cite web |url=https://nghttp2.org/nghttp3/programmers-guide.html |title=The nghttp3 programmers' guide |date=2020 |publisher=nghttp2 |access-date=March 19, 2023}}
References
=Citations=
{{Reflist}}
=Bibliography=
- {{Cite book |last1=Ludin |first1=Stephen |last2=Garza |first2=Javier |date=2017 |title=Learning HTTP/2: A Practical Guide for Beginners |location=Sebastopol |publisher=O'Reilly Media |isbn=9781491962619}}
- {{Cite book |last=Pollard |first=Barry |date=2019 |title=HTTP/2 in Action |location=Shelter Island |publisher=Manning Publications |isbn=9781638352334}}