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< div class = "section" id = "nghttp2-http-2-c-library" >
< h1 > nghttp2 - HTTP/2 C Library< a class = "headerlink" href = "#nghttp2-http-2-c-library" title = "Permalink to this headline" > ¶< / a > < / h1 >
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< p > This is an implementation of Hypertext Transfer Protocol version 2
in C.< / p >
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< p > The framing layer of HTTP/2 is implemented as a form of reusable C
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library. On top of that, we have implemented HTTP/2 client, server
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and proxy. We have also developed load test and benchmarking tool for
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HTTP/2 and SPDY.< / p >
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< p > HPACK encoder and decoder are available as public API.< / p >
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< p > The experimental high level C++ library is also available.< / p >
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< p > We have Python binding of this libary, but we have not covered
everything yet.< / p >
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< div class = "section" id = "development-status" >
< h2 > Development Status< a class = "headerlink" href = "#development-status" title = "Permalink to this headline" > ¶< / a > < / h2 >
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< p > We started to implement h2-14
(< a class = "reference external" href = "http://tools.ietf.org/html/draft-ietf-httpbis-http2-14" > http://tools.ietf.org/html/draft-ietf-httpbis-http2-14< / a > ), the header
compression
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(< a class = "reference external" href = "http://tools.ietf.org/html/draft-ietf-httpbis-header-compression-09" > http://tools.ietf.org/html/draft-ietf-httpbis-header-compression-09< / a > ).< / p >
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< p > The nghttp2 code base was forked from spdylay project.< / p >
< table border = "1" class = "docutils" >
< colgroup >
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< col width = "79%" / >
< col width = "21%" / >
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< / colgroup >
< thead valign = "bottom" >
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< tr class = "row-odd" > < th class = "head" > HTTP/2 Features< / th >
< th class = "head" > Support< / th >
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< / tr >
< / thead >
< tbody valign = "top" >
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< tr class = "row-even" > < td > Core frames handling< / td >
< td > Yes< / td >
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< / tr >
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< tr class = "row-odd" > < td > Dependency Tree< / td >
< td > Yes< / td >
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< / tr >
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< tr class = "row-even" > < td > Large header (CONTINUATION)< / td >
< td > Yes< / td >
< / tr >
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< / tbody >
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< div class = "section" id = "public-test-server" >
< h2 > Public Test Server< a class = "headerlink" href = "#public-test-server" title = "Permalink to this headline" > ¶< / a > < / h2 >
< p > The following endpoints are available to try out nghttp2
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implementation.< / p >
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< ul >
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< li > < p class = "first" > < a class = "reference external" href = "https://nghttp2.org/" > https://nghttp2.org/< / a > (TLS + ALPN/NPN)< / p >
< p > NPN offer < tt class = "docutils literal" > < span class = "pre" > h2-14< / span > < / tt > , < tt class = "docutils literal" > < span class = "pre" > spdy/3.1< / span > < / tt > and < tt class = "docutils literal" > < span class = "pre" > http/1.1< / span > < / tt > .< / p >
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< p > This endpoint requires TLSv1.2 for HTTP/2 connection.< / p >
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< / li >
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< li > < p class = "first" > < a class = "reference external" href = "http://nghttp2.org/" > http://nghttp2.org/< / a > (Upgrade / Direct)< / p >
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< p > < tt class = "docutils literal" > < span class = "pre" > h2c-14< / span > < / tt > and < tt class = "docutils literal" > < span class = "pre" > http/1.1< / span > < / tt > .< / p >
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< / div >
< div class = "section" id = "requirements" >
< h2 > Requirements< a class = "headerlink" href = "#requirements" title = "Permalink to this headline" > ¶< / a > < / h2 >
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< p > The following package is required to build the libnghttp2 library:< / p >
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< ul class = "simple" >
< li > pkg-config > = 0.20< / li >
< / ul >
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< p > To build and run the unit test programs, the following package is
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required:< / p >
< ul class = "simple" >
< li > cunit > = 2.1< / li >
< / ul >
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< p > To build the documentation, you need to install:< / p >
< ul class = "simple" >
< li > sphinx (< a class = "reference external" href = "http://sphinx-doc.org/" > http://sphinx-doc.org/< / a > )< / li >
< / ul >
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< p > To build and run the application programs (< tt class = "docutils literal" > < span class = "pre" > nghttp< / span > < / tt > , < tt class = "docutils literal" > < span class = "pre" > nghttpd< / span > < / tt > and
< tt class = "docutils literal" > < span class = "pre" > nghttpx< / span > < / tt > ) in < tt class = "docutils literal" > < span class = "pre" > src< / span > < / tt > directory, the following packages are
required:< / p >
< ul class = "simple" >
< li > OpenSSL > = 1.0.1< / li >
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< li > libev > = 4.15< / li >
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< li > zlib > = 1.2.3< / li >
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< / ul >
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< p > ALPN support requires unreleased version OpenSSL > = 1.0.2.< / p >
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< p > To enable SPDY protocol in the application program < tt class = "docutils literal" > < span class = "pre" > nghttpx< / span > < / tt > and
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< tt class = "docutils literal" > < span class = "pre" > h2load< / span > < / tt > , the following package is required:< / p >
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< ul class = "simple" >
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< li > spdylay > = 1.3.0< / li >
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< / ul >
< p > To enable < tt class = "docutils literal" > < span class = "pre" > -a< / span > < / tt > option (getting linked assets from the downloaded
2014-05-06 16:23:33 +02:00
resource) in < tt class = "docutils literal" > < span class = "pre" > nghttp< / span > < / tt > , the following package is required:< / p >
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< ul class = "simple" >
< li > libxml2 > = 2.7.7< / li >
< / ul >
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< p > The HPACK tools require the following package:< / p >
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< ul class = "simple" >
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< li > jansson > = 2.5< / li >
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< / ul >
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< p > To build sources under examples directory, libevent is required:< / p >
< ul class = "simple" >
< li > libevent-openssl > = 2.0.8< / li >
< / ul >
2014-03-05 16:20:32 +01:00
< p > To mitigate heap fragmentation in long running server programs
(< tt class = "docutils literal" > < span class = "pre" > nghttpd< / span > < / tt > and < tt class = "docutils literal" > < span class = "pre" > nghttpx< / span > < / tt > ), jemalloc is recommended:< / p >
< ul class = "simple" >
< li > jemalloc< / li >
< / ul >
2014-09-28 17:05:31 +02:00
< p > libnghttp2_asio C++ library requires the following packages:< / p >
< ul class = "simple" >
< li > libboost-dev > = 1.54.0< / li >
< li > libboost-thread-dev > = 1.54.0< / li >
< / ul >
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< p > The Python bindings require the following packages:< / p >
< ul class = "simple" >
< li > cython > = 0.19< / li >
< li > python > = 2.7< / li >
< / ul >
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< p > If you are using Ubuntu 14.04 LTS, you need the following packages
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installed:< / p >
< ul class = "simple" >
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< li > make< / li >
< li > binutils< / li >
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< li > autoconf< / li >
< li > automake< / li >
< li > autotools-dev< / li >
< li > libtool< / li >
< li > pkg-config< / li >
< li > zlib1g-dev< / li >
< li > libcunit1-dev< / li >
< li > libssl-dev< / li >
< li > libxml2-dev< / li >
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< li > libev-dev< / li >
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< li > libevent-dev< / li >
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< li > libjansson-dev< / li >
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< li > libjemalloc-dev< / li >
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< li > cython< / li >
< li > python3.4-dev< / li >
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< / ul >
< p > spdylay is not packaged in Ubuntu, so you need to build it yourself:
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< a class = "reference external" href = "http://tatsuhiro-t.github.io/spdylay/" > http://tatsuhiro-t.github.io/spdylay/< / a > < / p >
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< / div >
< div class = "section" id = "build-from-git" >
< h2 > Build from git< a class = "headerlink" href = "#build-from-git" title = "Permalink to this headline" > ¶< / a > < / h2 >
< p > Building from git is easy, but please be sure that at least autoconf 2.68 is
used:< / p >
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< div class = "highlight-c" > < div class = "highlight" > < pre > $ autoreconf -i
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$ automake
$ autoconf
$ ./configure
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$ make
< / pre > < / div >
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< / div >
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< p > To compile source code, gcc > = 4.8.3 or clang > = 3.4 is required.< / p >
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< div class = "admonition note" >
< p class = "first admonition-title" > Note< / p >
< p class = "last" > Mac OS X users may need < tt class = "docutils literal" > < span class = "pre" > --disable-threads< / span > < / tt > configure option to
disable multi threading in nghttpd, nghttpx and h2load to prevent
them from crashing. Patch is welcome to make multi threading work
on Mac OS X platform.< / p >
< / div >
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< / div >
< div class = "section" id = "building-documentation" >
< h2 > Building documentation< a class = "headerlink" href = "#building-documentation" title = "Permalink to this headline" > ¶< / a > < / h2 >
< div class = "admonition note" >
< p class = "first admonition-title" > Note< / p >
< p class = "last" > Documentation is still incomplete.< / p >
< / div >
< p > To build documentation, run:< / p >
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< div class = "highlight-c" > < div class = "highlight" > < pre > $ make html
< / pre > < / div >
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< / div >
< p > The documents will be generated under < tt class = "docutils literal" > < span class = "pre" > doc/manual/html/< / span > < / tt > .< / p >
< p > The generated documents will not be installed with < tt class = "docutils literal" > < span class = "pre" > make< / span > < span class = "pre" > install< / span > < / tt > .< / p >
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< p > The online documentation is available at
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< a class = "reference external" href = "https://nghttp2.org/documentation/" > https://nghttp2.org/documentation/< / a > < / p >
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< / div >
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< div class = "section" id = "unit-tests" >
< h2 > Unit tests< a class = "headerlink" href = "#unit-tests" title = "Permalink to this headline" > ¶< / a > < / h2 >
< p > Unit tests are done by simply running < tt class = "xref c c-func docutils literal" > < span class = "pre" > make< / span > < span class = "pre" > check()< / span > < / tt > .< / p >
< / div >
< div class = "section" id = "integration-tests" >
< h2 > Integration tests< a class = "headerlink" href = "#integration-tests" title = "Permalink to this headline" > ¶< / a > < / h2 >
< p > We have the integration tests for nghttpx proxy server. The tests are
written in < a class = "reference external" href = "http://golang.org/" > Go programming language< / a > and uses
its testing framework. We depend on the following libraries:< / p >
< ul class = "simple" >
< li > < a class = "reference external" href = "https://github.com/bradfitz/http2" > https://github.com/bradfitz/http2< / a > < / li >
< li > < a class = "reference external" href = "https://github.com/tatsuhiro-t/go-nghttp2" > https://github.com/tatsuhiro-t/go-nghttp2< / a > < / li >
< li > < a class = "reference external" href = "https://golang.org/x/net/spdy" > https://golang.org/x/net/spdy< / a > < / li >
< / ul >
< p > To download the above packages, after settings < tt class = "docutils literal" > < span class = "pre" > GOPATH< / span > < / tt > , run the
following command under < tt class = "docutils literal" > < span class = "pre" > integration-tests< / span > < / tt > directory:< / p >
< div class = "highlight-c" > < div class = "highlight" > < pre > $ make itprep
< / pre > < / div >
< / div >
< p > To run the tests, run the following command under
< tt class = "docutils literal" > < span class = "pre" > integration-tests< / span > < / tt > directory:< / p >
< div class = "highlight-c" > < div class = "highlight" > < pre > $ make it
< / pre > < / div >
< / div >
< p > Inside the tests, we use port 3009 to run test subject server.< / p >
< / div >
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< div class = "section" id = "client-server-and-proxy-programs" >
< h2 > Client, Server and Proxy programs< a class = "headerlink" href = "#client-server-and-proxy-programs" title = "Permalink to this headline" > ¶< / a > < / h2 >
2014-04-05 12:26:23 +02:00
< p > The src directory contains HTTP/2 client, server and proxy programs.< / p >
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< div class = "section" id = "nghttp-client" >
< h3 > nghttp - client< a class = "headerlink" href = "#nghttp-client" title = "Permalink to this headline" > ¶< / a > < / h3 >
2014-04-08 17:17:05 +02:00
< p > < tt class = "docutils literal" > < span class = "pre" > nghttp< / span > < / tt > is a HTTP/2 client. It can connect to the HTTP/2 server
2014-01-01 17:03:29 +01:00
with prior knowledge, HTTP Upgrade and NPN/ALPN TLS extension.< / p >
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< p > It has verbose output mode for framing information. Here is sample
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output from < tt class = "docutils literal" > < span class = "pre" > nghttp< / span > < / tt > client:< / p >
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< div class = "highlight-c" > < div class = "highlight" > < pre > $ src/nghttp -nv https://nghttp2.org
[ 0.033][NPN] server offers:
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* h2-14
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* spdy/3.1
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* http/1.1
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The negotiated protocol: h2-14
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[ 0.068] send SETTINGS frame < length=15, flags=0x00, stream_id=0>
(niv=3)
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[SETTINGS_MAX_CONCURRENT_STREAMS(3):100]
[SETTINGS_INITIAL_WINDOW_SIZE(4):65535]
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[SETTINGS_COMPRESS_DATA(5):1]
[ 0.068] send HEADERS frame < length=46, flags=0x05, stream_id=1>
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; END_STREAM | END_HEADERS
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(padlen=0)
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; Open new stream
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:authority: nghttp2.org
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:method: GET
:path: /
:scheme: https
accept: */*
accept-encoding: gzip, deflate
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user-agent: nghttp2/0.4.0-DEV
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[ 0.068] recv SETTINGS frame < length=10, flags=0x00, stream_id=0>
(niv=2)
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[SETTINGS_MAX_CONCURRENT_STREAMS(3):100]
[SETTINGS_INITIAL_WINDOW_SIZE(4):65535]
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[ 0.068] send SETTINGS frame < length=0, flags=0x01, stream_id=0>
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; ACK
(niv=0)
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[ 0.079] recv SETTINGS frame < length=0, flags=0x01, stream_id=0>
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; ACK
(niv=0)
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[ 0.080] (stream_id=1, noind=0) :status: 200
[ 0.080] (stream_id=1, noind=0) accept-ranges: bytes
[ 0.080] (stream_id=1, noind=0) age: 15
[ 0.080] (stream_id=1, noind=0) content-length: 40243
[ 0.080] (stream_id=1, noind=0) content-type: text/html
[ 0.080] (stream_id=1, noind=0) date: Wed, 14 May 2014 15:14:30 GMT
[ 0.080] (stream_id=1, noind=0) etag: " 535d0eea-9d33"
[ 0.080] (stream_id=1, noind=0) last-modified: Sun, 27 Apr 2014 14:06:34 GMT
[ 0.080] (stream_id=1, noind=0) server: nginx/1.4.6 (Ubuntu)
[ 0.080] (stream_id=1, noind=0) x-varnish: 2114900538 2114900537
[ 0.080] (stream_id=1, noind=0) via: 1.1 varnish, 1.1 nghttpx
[ 0.080] (stream_id=1, noind=0) strict-transport-security: max-age=31536000
[ 0.080] recv HEADERS frame < length=162, flags=0x04, stream_id=1>
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; END_HEADERS
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(padlen=0)
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; First response header
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[ 0.080] recv DATA frame < length=3786, flags=0x00, stream_id=1>
[ 0.080] recv DATA frame < length=4096, flags=0x00, stream_id=1>
[ 0.081] recv DATA frame < length=4096, flags=0x00, stream_id=1>
[ 0.093] recv DATA frame < length=4096, flags=0x00, stream_id=1>
[ 0.093] recv DATA frame < length=4096, flags=0x00, stream_id=1>
[ 0.094] recv DATA frame < length=4096, flags=0x00, stream_id=1>
[ 0.094] recv DATA frame < length=4096, flags=0x00, stream_id=1>
[ 0.094] recv DATA frame < length=4096, flags=0x00, stream_id=1>
[ 0.096] recv DATA frame < length=4096, flags=0x00, stream_id=1>
[ 0.096] send WINDOW_UPDATE frame < length=4, flags=0x00, stream_id=0>
(window_size_increment=36554)
[ 0.096] send WINDOW_UPDATE frame < length=4, flags=0x00, stream_id=1>
(window_size_increment=36554)
[ 0.108] recv DATA frame < length=3689, flags=0x00, stream_id=1>
[ 0.108] recv DATA frame < length=0, flags=0x01, stream_id=1>
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; END_STREAM
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[ 0.108] send GOAWAY frame < length=8, flags=0x00, stream_id=0>
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(last_stream_id=0, error_code=NO_ERROR(0), opaque_data(0)=[])
< / pre > < / div >
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< / div >
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< p > The HTTP Upgrade is performed like this:< / p >
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< div class = "highlight-c" > < div class = "highlight" > < pre > $ src/nghttp -nvu http://nghttp2.org
[ 0.013] HTTP Upgrade request
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GET / HTTP/1.1
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Host: nghttp2.org
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Connection: Upgrade, HTTP2-Settings
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Upgrade: h2c-14
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HTTP2-Settings: AwAAAGQEAAD__wUAAAAB
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Accept: */*
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User-Agent: nghttp2/0.4.0-DEV
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[ 0.024] HTTP Upgrade response
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HTTP/1.1 101 Switching Protocols
Connection: Upgrade
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Upgrade: h2c-14
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[ 0.024] HTTP Upgrade success
[ 0.024] send SETTINGS frame < length=15, flags=0x00, stream_id=0>
(niv=3)
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[SETTINGS_MAX_CONCURRENT_STREAMS(3):100]
[SETTINGS_INITIAL_WINDOW_SIZE(4):65535]
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[SETTINGS_COMPRESS_DATA(5):1]
[ 0.024] recv SETTINGS frame < length=10, flags=0x00, stream_id=0>
(niv=2)
2014-02-16 07:51:22 +01:00
[SETTINGS_MAX_CONCURRENT_STREAMS(3):100]
[SETTINGS_INITIAL_WINDOW_SIZE(4):65535]
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[ 0.024] send SETTINGS frame < length=0, flags=0x01, stream_id=0>
; ACK
(niv=0)
[ 0.024] (stream_id=1, noind=0) :status: 200
[ 0.024] (stream_id=1, noind=0) accept-ranges: bytes
[ 0.024] (stream_id=1, noind=0) age: 10
[ 0.024] (stream_id=1, noind=0) content-length: 40243
[ 0.024] (stream_id=1, noind=0) content-type: text/html
[ 0.024] (stream_id=1, noind=0) date: Wed, 14 May 2014 15:16:34 GMT
[ 0.024] (stream_id=1, noind=0) etag: " 535d0eea-9d33"
[ 0.024] (stream_id=1, noind=0) last-modified: Sun, 27 Apr 2014 14:06:34 GMT
[ 0.024] (stream_id=1, noind=0) server: nginx/1.4.6 (Ubuntu)
[ 0.024] (stream_id=1, noind=0) x-varnish: 2114900541 2114900540
[ 0.024] (stream_id=1, noind=0) via: 1.1 varnish, 1.1 nghttpx
[ 0.024] recv HEADERS frame < length=148, flags=0x04, stream_id=1>
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; END_HEADERS
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(padlen=0)
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; First response header
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[ 0.024] recv DATA frame < length=3786, flags=0x00, stream_id=1>
[ 0.025] recv DATA frame < length=4096, flags=0x00, stream_id=1>
[ 0.031] recv DATA frame < length=4096, flags=0x00, stream_id=1>
[ 0.031] recv DATA frame < length=4096, flags=0x00, stream_id=1>
[ 0.032] recv DATA frame < length=4096, flags=0x00, stream_id=1>
[ 0.032] recv DATA frame < length=4096, flags=0x00, stream_id=1>
[ 0.033] recv DATA frame < length=4096, flags=0x00, stream_id=1>
[ 0.033] recv DATA frame < length=4096, flags=0x00, stream_id=1>
[ 0.033] send WINDOW_UPDATE frame < length=4, flags=0x00, stream_id=0>
(window_size_increment=33164)
[ 0.033] send WINDOW_UPDATE frame < length=4, flags=0x00, stream_id=1>
(window_size_increment=33164)
[ 0.038] recv DATA frame < length=4096, flags=0x00, stream_id=1>
[ 0.038] recv DATA frame < length=3689, flags=0x00, stream_id=1>
[ 0.038] recv DATA frame < length=0, flags=0x01, stream_id=1>
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; END_STREAM
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[ 0.038] recv SETTINGS frame < length=0, flags=0x01, stream_id=0>
2013-10-28 15:32:57 +01:00
; ACK
(niv=0)
2014-05-14 17:22:42 +02:00
[ 0.038] send GOAWAY frame < length=8, flags=0x00, stream_id=0>
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(last_stream_id=0, error_code=NO_ERROR(0), opaque_data(0)=[])
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< / pre > < / div >
2013-08-03 13:03:39 +02:00
< / div >
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< / div >
< div class = "section" id = "nghttpd-server" >
< h3 > nghttpd - server< a class = "headerlink" href = "#nghttpd-server" title = "Permalink to this headline" > ¶< / a > < / h3 >
2014-03-04 15:36:05 +01:00
< p > < tt class = "docutils literal" > < span class = "pre" > nghttpd< / span > < / tt > is a multi-threaded static web server.< / p >
2014-04-08 17:17:05 +02:00
< p > By default, it uses SSL/TLS connection. Use < tt class = "docutils literal" > < span class = "pre" > --no-tls< / span > < / tt > option to
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disable it.< / p >
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< p > < tt class = "docutils literal" > < span class = "pre" > nghttpd< / span > < / tt > only accepts the HTTP/2 connection via NPN/ALPN or direct
2014-04-08 17:17:05 +02:00
HTTP/2 connection. No HTTP Upgrade is supported.< / p >
2013-12-08 16:07:37 +01:00
< p > < tt class = "docutils literal" > < span class = "pre" > -p< / span > < / tt > option allows users to configure server push.< / p >
2013-07-28 14:26:41 +02:00
< p > Just like < tt class = "docutils literal" > < span class = "pre" > nghttp< / span > < / tt > , it has verbose output mode for framing
2014-04-08 17:17:05 +02:00
information. Here is sample output from < tt class = "docutils literal" > < span class = "pre" > nghttpd< / span > < / tt > server:< / p >
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< div class = "highlight-c" > < div class = "highlight" > < pre > $ src/nghttpd --no-tls -v 8080
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IPv4: listen on port 8080
IPv6: listen on port 8080
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[id=1] [ 15.921] send SETTINGS frame < length=10, flags=0x00, stream_id=0>
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(niv=2)
[SETTINGS_MAX_CONCURRENT_STREAMS(3):100]
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[SETTINGS_COMPRESS_DATA(5):1]
[id=1] [ 15.921] recv SETTINGS frame < length=15, flags=0x00, stream_id=0>
(niv=3)
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[SETTINGS_MAX_CONCURRENT_STREAMS(3):100]
[SETTINGS_INITIAL_WINDOW_SIZE(4):65535]
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[SETTINGS_COMPRESS_DATA(5):1]
[id=1] [ 15.921] (stream_id=1, noind=0) :authority: localhost:8080
[id=1] [ 15.921] (stream_id=1, noind=0) :method: GET
[id=1] [ 15.921] (stream_id=1, noind=0) :path: /
[id=1] [ 15.921] (stream_id=1, noind=0) :scheme: http
[id=1] [ 15.921] (stream_id=1, noind=0) accept: */*
[id=1] [ 15.921] (stream_id=1, noind=0) accept-encoding: gzip, deflate
[id=1] [ 15.921] (stream_id=1, noind=0) user-agent: nghttp2/0.4.0-DEV
[id=1] [ 15.921] recv HEADERS frame < length=48, flags=0x05, stream_id=1>
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; END_STREAM | END_HEADERS
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(padlen=0)
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; Open new stream
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[id=1] [ 15.921] recv SETTINGS frame < length=0, flags=0x01, stream_id=0>
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; ACK
(niv=0)
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[id=1] [ 15.921] send SETTINGS frame < length=0, flags=0x01, stream_id=0>
; ACK
(niv=0)
[id=1] [ 15.921] send HEADERS frame < length=82, flags=0x04, stream_id=1>
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; END_HEADERS
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(padlen=0)
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; First response header
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:status: 200
cache-control: max-age=3600
content-length: 612
date: Wed, 14 May 2014 15:19:03 GMT
last-modified: Sat, 08 Mar 2014 16:04:06 GMT
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server: nghttpd nghttp2/0.4.0-DEV
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[id=1] [ 15.922] send DATA frame < length=381, flags=0x20, stream_id=1>
; COMPRESSED
[id=1] [ 15.922] send DATA frame < length=0, flags=0x01, stream_id=1>
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; END_STREAM
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[id=1] [ 15.922] stream_id=1 closed
[id=1] [ 15.922] recv GOAWAY frame < length=8, flags=0x00, stream_id=0>
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(last_stream_id=0, error_code=NO_ERROR(0), opaque_data(0)=[])
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[id=1] [ 15.922] closed
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< / pre > < / div >
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< / div >
< / div >
< div class = "section" id = "nghttpx-proxy" >
< h3 > nghttpx - proxy< a class = "headerlink" href = "#nghttpx-proxy" title = "Permalink to this headline" > ¶< / a > < / h3 >
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< p > < tt class = "docutils literal" > < span class = "pre" > nghttpx< / span > < / tt > is a multi-threaded reverse proxy for < tt class = "docutils literal" > < span class = "pre" > h2-14< / span > < / tt > , SPDY and
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HTTP/1.1 and powers nghttp2.org site. It has several operation modes:< / p >
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< table border = "1" class = "docutils" >
< colgroup >
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< col width = "25%" / >
< col width = "38%" / >
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< col width = "19%" / >
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< col width = "18%" / >
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< / colgroup >
< thead valign = "bottom" >
< tr class = "row-odd" > < th class = "head" > Mode option< / th >
< th class = "head" > Frontend< / th >
< th class = "head" > Backend< / th >
< th class = "head" > Note< / th >
< / tr >
< / thead >
< tbody valign = "top" >
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< tr class = "row-even" > < td > default mode< / td >
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< td > HTTP/2, SPDY, HTTP/1.1 (TLS)< / td >
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< td > HTTP/1.1< / td >
< td > Reverse proxy< / td >
< / tr >
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< tr class = "row-odd" > < td > < tt class = "docutils literal" > < span class = "pre" > --http2-proxy< / span > < / tt > < / td >
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< td > HTTP/2, SPDY, HTTP/1.1 (TLS)< / td >
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< td > HTTP/1.1< / td >
< td > SPDY proxy< / td >
< / tr >
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< tr class = "row-even" > < td > < tt class = "docutils literal" > < span class = "pre" > --http2-bridge< / span > < / tt > < / td >
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< td > HTTP/2, SPDY, HTTP/1.1 (TLS)< / td >
< td > HTTP/2 (TLS)< / td >
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< td > < / td >
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< / tr >
< tr class = "row-odd" > < td > < tt class = "docutils literal" > < span class = "pre" > --client< / span > < / tt > < / td >
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< td > HTTP/2, HTTP/1.1< / td >
< td > HTTP/2 (TLS)< / td >
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< td > < / td >
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< / tr >
< tr class = "row-even" > < td > < tt class = "docutils literal" > < span class = "pre" > --client-proxy< / span > < / tt > < / td >
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< td > HTTP/2, HTTP/1.1< / td >
< td > HTTP/2 (TLS)< / td >
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< td > Forward proxy< / td >
< / tr >
< / tbody >
< / table >
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< p > The interesting mode at the moment is the default mode. It works like
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a reverse proxy and listens for < tt class = "docutils literal" > < span class = "pre" > h2-14< / span > < / tt > , SPDY and HTTP/1.1 and can
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be deployed SSL/TLS terminator for existing web server.< / p >
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< p > The default mode, < tt class = "docutils literal" > < span class = "pre" > --http2-proxy< / span > < / tt > and < tt class = "docutils literal" > < span class = "pre" > --http2-bridge< / span > < / tt > modes use
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SSL/TLS in the frontend connection by default. To disable SSL/TLS,
use < tt class = "docutils literal" > < span class = "pre" > --frontend-no-tls< / span > < / tt > option. If that option is used, SPDY is
disabled in the frontend and incoming HTTP/1.1 connection can be
upgraded to HTTP/2 through HTTP Upgrade.< / p >
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< p > The < tt class = "docutils literal" > < span class = "pre" > --http2-bridge< / span > < / tt > , < tt class = "docutils literal" > < span class = "pre" > --client< / span > < / tt > and < tt class = "docutils literal" > < span class = "pre" > --client-proxy< / span > < / tt > modes use
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SSL/TLS in the backend connection by deafult. To disable SSL/TLS, use
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< tt class = "docutils literal" > < span class = "pre" > --backend-no-tls< / span > < / tt > option.< / p >
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< p > < tt class = "docutils literal" > < span class = "pre" > nghttpx< / span > < / tt > supports configuration file. See < tt class = "docutils literal" > < span class = "pre" > --conf< / span > < / tt > option and
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sample configuration file < tt class = "docutils literal" > < span class = "pre" > nghttpx.conf.sample< / span > < / tt > .< / p >
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< p > < tt class = "docutils literal" > < span class = "pre" > nghttpx< / span > < / tt > does not support server push.< / p >
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< p > In the default mode, (without any of < tt class = "docutils literal" > < span class = "pre" > --http2-proxy< / span > < / tt > ,
< tt class = "docutils literal" > < span class = "pre" > --http2-bridge< / span > < / tt > , < tt class = "docutils literal" > < span class = "pre" > --client-proxy< / span > < / tt > and < tt class = "docutils literal" > < span class = "pre" > --client< / span > < / tt > options),
< tt class = "docutils literal" > < span class = "pre" > nghttpx< / span > < / tt > works as reverse proxy to the backend server:< / p >
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< div class = "highlight-c" > < div class = "highlight" > < pre > < span class = "n" > Client< / span > < span class = "o" > < --< / span > < span class = "p" > (< / span > < span class = "n" > HTTP< / span > < span class = "o" > /< / span > < span class = "mi" > 2< / span > < span class = "p" > ,< / span > < span class = "n" > SPDY< / span > < span class = "p" > ,< / span > < span class = "n" > HTTP< / span > < span class = "o" > /< / span > < span class = "mf" > 1.1< / span > < span class = "p" > )< / span > < span class = "o" > --> < / span > < span class = "n" > nghttpx< / span > < span class = "o" > < --< / span > < span class = "p" > (< / span > < span class = "n" > HTTP< / span > < span class = "o" > /< / span > < span class = "mf" > 1.1< / span > < span class = "p" > )< / span > < span class = "o" > --> < / span > < span class = "n" > Web< / span > < span class = "n" > Server< / span >
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< span class = "p" > [< / span > < span class = "n" > reverse< / span > < span class = "n" > proxy< / span > < span class = "p" > ]< / span >
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< / pre > < / div >
< / div >
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< p > With < tt class = "docutils literal" > < span class = "pre" > --http2-proxy< / span > < / tt > option, it works as so called secure proxy (aka
SPDY proxy):< / p >
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< div class = "highlight-c" > < div class = "highlight" > < pre > < span class = "n" > Client< / span > < span class = "o" > < --< / span > < span class = "p" > (< / span > < span class = "n" > HTTP< / span > < span class = "o" > /< / span > < span class = "mi" > 2< / span > < span class = "p" > ,< / span > < span class = "n" > SPDY< / span > < span class = "p" > ,< / span > < span class = "n" > HTTP< / span > < span class = "o" > /< / span > < span class = "mf" > 1.1< / span > < span class = "p" > )< / span > < span class = "o" > --> < / span > < span class = "n" > nghttpx< / span > < span class = "o" > < --< / span > < span class = "p" > (< / span > < span class = "n" > HTTP< / span > < span class = "o" > /< / span > < span class = "mf" > 1.1< / span > < span class = "p" > )< / span > < span class = "o" > --> < / span > < span class = "n" > Proxy< / span >
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< span class = "p" > [< / span > < span class = "n" > secure< / span > < span class = "n" > proxy< / span > < span class = "p" > ]< / span > < span class = "p" > (< / span > < span class = "n" > e< / span > < span class = "p" > .< / span > < span class = "n" > g< / span > < span class = "p" > .,< / span > < span class = "n" > Squid< / span > < span class = "p" > ,< / span > < span class = "n" > ATS< / span > < span class = "p" > )< / span >
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< / pre > < / div >
< / div >
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< p > The < tt class = "docutils literal" > < span class = "pre" > Client< / span > < / tt > in the above needs to be configured to use
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< tt class = "docutils literal" > < span class = "pre" > nghttpx< / span > < / tt > as secure proxy.< / p >
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< p > At the time of this writing, Chrome is the only browser which supports
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secure proxy. The one way to configure Chrome to use secure proxy is
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create proxy.pac script like this:< / p >
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< div class = "highlight-javascript" > < div class = "highlight" > < pre > < span class = "kd" > function< / span > < span class = "nx" > FindProxyForURL< / span > < span class = "p" > (< / span > < span class = "nx" > url< / span > < span class = "p" > ,< / span > < span class = "nx" > host< / span > < span class = "p" > )< / span > < span class = "p" > {< / span >
< span class = "k" > return< / span > < span class = "s2" > " HTTPS SERVERADDR:PORT" < / span > < span class = "p" > ;< / span >
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< span class = "p" > }< / span >
< / pre > < / div >
< / div >
< p > < tt class = "docutils literal" > < span class = "pre" > SERVERADDR< / span > < / tt > and < tt class = "docutils literal" > < span class = "pre" > PORT< / span > < / tt > is the hostname/address and port of the
machine nghttpx is running. Please note that Chrome requires valid
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certificate for secure proxy.< / p >
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< p > Then run Chrome with the following arguments:< / p >
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< div class = "highlight-c" > < div class = "highlight" > < pre > $ google-chrome --proxy-pac-url=file:///path/to/proxy.pac --use-npn
< / pre > < / div >
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< / div >
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< p > With < tt class = "docutils literal" > < span class = "pre" > --http2-bridge< / span > < / tt > , it accepts HTTP/2, SPDY and HTTP/1.1
connections and communicates with backend in HTTP/2:< / p >
< div class = "highlight-c" > < div class = "highlight" > < pre > < span class = "n" > Client< / span > < span class = "o" > < --< / span > < span class = "p" > (< / span > < span class = "n" > HTTP< / span > < span class = "o" > /< / span > < span class = "mi" > 2< / span > < span class = "p" > ,< / span > < span class = "n" > SPDY< / span > < span class = "p" > ,< / span > < span class = "n" > HTTP< / span > < span class = "o" > /< / span > < span class = "mf" > 1.1< / span > < span class = "p" > )< / span > < span class = "o" > --> < / span > < span class = "n" > nghttpx< / span > < span class = "o" > < --< / span > < span class = "p" > (< / span > < span class = "n" > HTTP< / span > < span class = "o" > /< / span > < span class = "mi" > 2< / span > < span class = "p" > )< / span > < span class = "o" > --> < / span > < span class = "n" > Web< / span > < span class = "n" > or< / span > < span class = "n" > HTTP< / span > < span class = "o" > /< / span > < span class = "mi" > 2< / span > < span class = "n" > Proxy< / span > < span class = "n" > etc< / span >
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< span class = "p" > (< / span > < span class = "n" > e< / span > < span class = "p" > .< / span > < span class = "n" > g< / span > < span class = "p" > .,< / span > < span class = "n" > nghttpx< / span > < span class = "o" > -< / span > < span class = "n" > s< / span > < span class = "p" > )< / span >
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< / pre > < / div >
< / div >
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< p > With < tt class = "docutils literal" > < span class = "pre" > --client-proxy< / span > < / tt > option, it works as forward proxy and expects
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that the backend is HTTP/2 proxy:< / p >
< div class = "highlight-c" > < div class = "highlight" > < pre > < span class = "n" > Client< / span > < span class = "o" > < --< / span > < span class = "p" > (< / span > < span class = "n" > HTTP< / span > < span class = "o" > /< / span > < span class = "mi" > 2< / span > < span class = "p" > ,< / span > < span class = "n" > HTTP< / span > < span class = "o" > /< / span > < span class = "mf" > 1.1< / span > < span class = "p" > )< / span > < span class = "o" > --> < / span > < span class = "n" > nghttpx< / span > < span class = "o" > < --< / span > < span class = "p" > (< / span > < span class = "n" > HTTP< / span > < span class = "o" > /< / span > < span class = "mi" > 2< / span > < span class = "p" > )< / span > < span class = "o" > --> < / span > < span class = "n" > HTTP< / span > < span class = "o" > /< / span > < span class = "mi" > 2< / span > < span class = "n" > Proxy< / span >
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< span class = "p" > [< / span > < span class = "n" > forward< / span > < span class = "n" > proxy< / span > < span class = "p" > ]< / span > < span class = "p" > (< / span > < span class = "n" > e< / span > < span class = "p" > .< / span > < span class = "n" > g< / span > < span class = "p" > .,< / span > < span class = "n" > nghttpx< / span > < span class = "o" > -< / span > < span class = "n" > s< / span > < span class = "p" > )< / span >
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< / pre > < / div >
< / div >
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< p > The < tt class = "docutils literal" > < span class = "pre" > Client< / span > < / tt > needs to be configured to use nghttpx as forward
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proxy. The frontend HTTP/1.1 connection can be upgraded to HTTP/2
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through HTTP Upgrade. With the above configuration, one can use
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HTTP/1.1 client to access and test their HTTP/2 servers.< / p >
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< p > With < tt class = "docutils literal" > < span class = "pre" > --client< / span > < / tt > option, it works as reverse proxy and expects that
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the backend is HTTP/2 Web server:< / p >
< div class = "highlight-c" > < div class = "highlight" > < pre > < span class = "n" > Client< / span > < span class = "o" > < --< / span > < span class = "p" > (< / span > < span class = "n" > HTTP< / span > < span class = "o" > /< / span > < span class = "mi" > 2< / span > < span class = "p" > ,< / span > < span class = "n" > HTTP< / span > < span class = "o" > /< / span > < span class = "mf" > 1.1< / span > < span class = "p" > )< / span > < span class = "o" > --> < / span > < span class = "n" > nghttpx< / span > < span class = "o" > < --< / span > < span class = "p" > (< / span > < span class = "n" > HTTP< / span > < span class = "o" > /< / span > < span class = "mi" > 2< / span > < span class = "p" > )< / span > < span class = "o" > --> < / span > < span class = "n" > Web< / span > < span class = "n" > Server< / span >
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< span class = "p" > [< / span > < span class = "n" > reverse< / span > < span class = "n" > proxy< / span > < span class = "p" > ]< / span >
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< / pre > < / div >
< / div >
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< p > The frontend HTTP/1.1 connection can be upgraded to HTTP/2
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through HTTP Upgrade.< / p >
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< p > For the operation modes which talk to the backend in HTTP/2 over
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SSL/TLS, the backend connections can be tunneled through HTTP proxy.
The proxy is specified using < tt class = "docutils literal" > < span class = "pre" > --backend-http-proxy-uri< / span > < / tt > option. The
following figure illustrates the example of < tt class = "docutils literal" > < span class = "pre" > --http2-bridge< / span > < / tt > and
< tt class = "docutils literal" > < span class = "pre" > --backend-http-proxy-uri< / span > < / tt > options to talk to the outside HTTP/2
proxy through HTTP proxy:< / p >
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< div class = "highlight-c" > < div class = "highlight" > < pre > < span class = "n" > Client< / span > < span class = "o" > < --< / span > < span class = "p" > (< / span > < span class = "n" > HTTP< / span > < span class = "o" > /< / span > < span class = "mi" > 2< / span > < span class = "p" > ,< / span > < span class = "n" > SPDY< / span > < span class = "p" > ,< / span > < span class = "n" > HTTP< / span > < span class = "o" > /< / span > < span class = "mf" > 1.1< / span > < span class = "p" > )< / span > < span class = "o" > --> < / span > < span class = "n" > nghttpx< / span > < span class = "o" > < --< / span > < span class = "p" > (< / span > < span class = "n" > HTTP< / span > < span class = "o" > /< / span > < span class = "mi" > 2< / span > < span class = "p" > )< / span > < span class = "o" > --< / span >
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< span class = "o" > --===================---> < / span > < span class = "n" > HTTP< / span > < span class = "o" > /< / span > < span class = "mi" > 2< / span > < span class = "n" > Proxy< / span >
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< span class = "p" > (< / span > < span class = "n" > HTTP< / span > < span class = "n" > proxy< / span > < span class = "n" > tunnel< / span > < span class = "p" > )< / span > < span class = "p" > (< / span > < span class = "n" > e< / span > < span class = "p" > .< / span > < span class = "n" > g< / span > < span class = "p" > .,< / span > < span class = "n" > nghttpx< / span > < span class = "o" > -< / span > < span class = "n" > s< / span > < span class = "p" > )< / span >
< / pre > < / div >
< / div >
< / div >
< / div >
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< div class = "section" id = "benchmarking-tool" >
< h2 > Benchmarking tool< a class = "headerlink" href = "#benchmarking-tool" title = "Permalink to this headline" > ¶< / a > < / h2 >
< p > The < tt class = "docutils literal" > < span class = "pre" > h2load< / span > < / tt > program is a benchmarking tool for HTTP/2 and SPDY.
The SPDY support is enabled if the program was built with spdylay
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library. The UI of < tt class = "docutils literal" > < span class = "pre" > h2load< / span > < / tt > is heavily inspired by < tt class = "docutils literal" > < span class = "pre" > weighttp< / span > < / tt >
(< a class = "reference external" href = "https://github.com/lighttpd/weighttp" > https://github.com/lighttpd/weighttp< / a > ). The typical usage is as
follows:< / p >
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< div class = "highlight-c" > < div class = "highlight" > < pre > $ src/h2load -n1000 -c10 -m10 https://127.0.0.1:8443/
starting benchmark...
progress: 10% done
progress: 20% done
progress: 30% done
progress: 40% done
progress: 50% done
progress: 60% done
progress: 70% done
progress: 80% done
progress: 90% done
progress: 100% done
finished in 0 sec, 152 millisec and 152 microsec, 6572 req/s, 749 kbytes/s
requests: 1000 total, 1000 started, 1000 done, 0 succeeded, 1000 failed, 0 errored
status codes: 0 2xx, 0 3xx, 1000 4xx, 0 5xx
traffic: 141100 bytes total, 840 bytes headers, 116000 bytes data
< / pre > < / div >
< / div >
< p > The above example issued total 1000 requests, using 10 concurrent
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clients (thus 10 HTTP/2 sessions), and maximum 10 streams per client.
With < tt class = "docutils literal" > < span class = "pre" > -t< / span > < / tt > option, < tt class = "docutils literal" > < span class = "pre" > h2load< / span > < / tt > will use multiple native threads to
avoid saturating single core on client side.< / p >
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< div class = "admonition warning" >
< p class = "first admonition-title" > Warning< / p >
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< p class = "last" > < strong > Don't use this tool against publicly available servers.< / strong > That is
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considered a DOS attack. Please only use against your private
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servers.< / p >
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< / div >
< / div >
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< div class = "section" id = "hpack-tools" >
< h2 > HPACK tools< a class = "headerlink" href = "#hpack-tools" title = "Permalink to this headline" > ¶< / a > < / h2 >
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< p > The < tt class = "docutils literal" > < span class = "pre" > src< / span > < / tt > directory contains HPACK tools. The < tt class = "docutils literal" > < span class = "pre" > deflatehd< / span > < / tt > is a
command-line header compression tool. The < tt class = "docutils literal" > < span class = "pre" > inflatehd< / span > < / tt > is
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command-line header decompression tool. Both tools read input from
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stdin and write output to stdout. The errors are written to stderr.
They take JSON as input and output. We use (mostly) same JSON data
format described at < a class = "reference external" href = "https://github.com/http2jp/hpack-test-case" > https://github.com/http2jp/hpack-test-case< / a > < / p >
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< div class = "section" id = "deflatehd-header-compressor" >
< h3 > deflatehd - header compressor< a class = "headerlink" href = "#deflatehd-header-compressor" title = "Permalink to this headline" > ¶< / a > < / h3 >
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< p > The < tt class = "docutils literal" > < span class = "pre" > deflatehd< / span > < / tt > reads JSON data or HTTP/1-style header fields from
stdin and outputs compressed header block in JSON.< / p >
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< p > For the JSON input, the root JSON object must include < tt class = "docutils literal" > < span class = "pre" > cases< / span > < / tt > key.
Its value has to include the sequence of input header set. They share
the same compression context and are processed in the order they
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appear. Each item in the sequence is a JSON object and it must
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include < tt class = "docutils literal" > < span class = "pre" > headers< / span > < / tt > key. Its value is an array of a JSON object,
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which includes exactly one name/value pair.< / p >
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< p > Example:< / p >
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< div class = "highlight-json" > < div class = "highlight" > < pre > < span class = "p" > {< / span >
< span class = "nt" > " cases" < / span > < span class = "p" > :< / span >
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< span class = "p" > [< / span >
< span class = "p" > {< / span >
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< span class = "nt" > " headers" < / span > < span class = "p" > :< / span > < span class = "p" > [< / span >
< span class = "p" > {< / span > < span class = "nt" > " :method" < / span > < span class = "p" > :< / span > < span class = "s2" > " GET" < / span > < span class = "p" > },< / span >
< span class = "p" > {< / span > < span class = "nt" > " :path" < / span > < span class = "p" > :< / span > < span class = "s2" > " /" < / span > < span class = "p" > }< / span >
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< span class = "p" > ]< / span >
< span class = "p" > },< / span >
< span class = "p" > {< / span >
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< span class = "nt" > " headers" < / span > < span class = "p" > :< / span > < span class = "p" > [< / span >
< span class = "p" > {< / span > < span class = "nt" > " :method" < / span > < span class = "p" > :< / span > < span class = "s2" > " POST" < / span > < span class = "p" > },< / span >
< span class = "p" > {< / span > < span class = "nt" > " :path" < / span > < span class = "p" > :< / span > < span class = "s2" > " /" < / span > < span class = "p" > }< / span >
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< span class = "p" > ]< / span >
< span class = "p" > }< / span >
< span class = "p" > ]< / span >
< span class = "p" > }< / span >
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< / pre > < / div >
< / div >
< p > With < tt class = "docutils literal" > < span class = "pre" > -t< / span > < / tt > option, the program can accept more familiar HTTP/1 style
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header field block. Each header set is delimited by empty line:< / p >
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< p > Example:< / p >
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< div class = "highlight-c" > < div class = "highlight" > < pre > < span class = "o" > :< / span > < span class = "nl" > method< / span > < span class = "p" > :< / span > < span class = "nl" > GET< / span >
< span class = "p" > :< / span > < span class = "nl" > scheme< / span > < span class = "p" > :< / span > < span class = "nl" > https< / span >
< span class = "p" > :< / span > < span class = "nl" > path< / span > < span class = "p" > :< / span > < span class = "o" > /< / span >
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< span class = "o" > :< / span > < span class = "nl" > method< / span > < span class = "p" > :< / span > < span class = "n" > POST< / span >
< span class = "n" > user< / span > < span class = "o" > -< / span > < span class = "nl" > agent< / span > < span class = "p" > :< / span > < span class = "n" > nghttp2< / span >
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< / pre > < / div >
< / div >
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< p > The output is JSON object. It should include < tt class = "docutils literal" > < span class = "pre" > cases< / span > < / tt > key and its
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value is an array of JSON object, which has at least following keys:< / p >
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< dl class = "docutils" >
< dt > seq< / dt >
< dd > The index of header set in the input.< / dd >
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< dt > input_length< / dt >
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< dd > The sum of length of name/value pair in the input.< / dd >
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< dt > output_length< / dt >
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< dd > The length of compressed header block.< / dd >
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< dt > percentage_of_original_size< / dt >
< dd > < tt class = "docutils literal" > < span class = "pre" > input_length< / span > < / tt > / < tt class = "docutils literal" > < span class = "pre" > output_length< / span > < / tt > * 100< / dd >
< dt > wire< / dt >
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< dd > The compressed header block in hex string.< / dd >
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< dt > headers< / dt >
< dd > The input header set.< / dd >
< dt > header_table_size< / dt >
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< dd > The header table size adjusted before deflating header set.< / dd >
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< / dl >
< p > Examples:< / p >
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< div class = "highlight-json" > < div class = "highlight" > < pre > < span class = "p" > {< / span >
< span class = "nt" > " cases" < / span > < span class = "p" > :< / span >
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< span class = "p" > [< / span >
< span class = "p" > {< / span >
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< span class = "nt" > " seq" < / span > < span class = "p" > :< / span > < span class = "mi" > 0< / span > < span class = "p" > ,< / span >
< span class = "nt" > " input_length" < / span > < span class = "p" > :< / span > < span class = "mi" > 66< / span > < span class = "p" > ,< / span >
< span class = "nt" > " output_length" < / span > < span class = "p" > :< / span > < span class = "mi" > 20< / span > < span class = "p" > ,< / span >
< span class = "nt" > " percentage_of_original_size" < / span > < span class = "p" > :< / span > < span class = "mf" > 30.303030303030305< / span > < span class = "p" > ,< / span >
< span class = "nt" > " wire" < / span > < span class = "p" > :< / span > < span class = "s2" > " 01881f3468e5891afcbf83868a3d856659c62e3f" < / span > < span class = "p" > ,< / span >
< span class = "nt" > " headers" < / span > < span class = "p" > :< / span > < span class = "p" > [< / span >
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< span class = "p" > {< / span >
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< span class = "nt" > " :authority" < / span > < span class = "p" > :< / span > < span class = "s2" > " example.org" < / span >
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< span class = "p" > },< / span >
< span class = "p" > {< / span >
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< span class = "nt" > " :method" < / span > < span class = "p" > :< / span > < span class = "s2" > " GET" < / span >
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< span class = "p" > },< / span >
< span class = "p" > {< / span >
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< span class = "nt" > " :path" < / span > < span class = "p" > :< / span > < span class = "s2" > " /" < / span >
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< span class = "p" > },< / span >
< span class = "p" > {< / span >
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< span class = "nt" > " :scheme" < / span > < span class = "p" > :< / span > < span class = "s2" > " https" < / span >
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< span class = "p" > },< / span >
< span class = "p" > {< / span >
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< span class = "nt" > " user-agent" < / span > < span class = "p" > :< / span > < span class = "s2" > " nghttp2" < / span >
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< span class = "p" > }< / span >
< span class = "p" > ],< / span >
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< span class = "nt" > " header_table_size" < / span > < span class = "p" > :< / span > < span class = "mi" > 4096< / span >
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< span class = "p" > }< / span >
< span class = "p" > ,< / span >
< span class = "p" > {< / span >
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< span class = "nt" > " seq" < / span > < span class = "p" > :< / span > < span class = "mi" > 1< / span > < span class = "p" > ,< / span >
< span class = "nt" > " input_length" < / span > < span class = "p" > :< / span > < span class = "mi" > 74< / span > < span class = "p" > ,< / span >
< span class = "nt" > " output_length" < / span > < span class = "p" > :< / span > < span class = "mi" > 10< / span > < span class = "p" > ,< / span >
< span class = "nt" > " percentage_of_original_size" < / span > < span class = "p" > :< / span > < span class = "mf" > 13.513513513513514< / span > < span class = "p" > ,< / span >
< span class = "nt" > " wire" < / span > < span class = "p" > :< / span > < span class = "s2" > " 88448504252dd5918485" < / span > < span class = "p" > ,< / span >
< span class = "nt" > " headers" < / span > < span class = "p" > :< / span > < span class = "p" > [< / span >
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< span class = "p" > {< / span >
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< span class = "nt" > " :authority" < / span > < span class = "p" > :< / span > < span class = "s2" > " example.org" < / span >
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< span class = "p" > },< / span >
< span class = "p" > {< / span >
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< span class = "nt" > " :method" < / span > < span class = "p" > :< / span > < span class = "s2" > " POST" < / span >
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< span class = "p" > },< / span >
< span class = "p" > {< / span >
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< span class = "nt" > " :path" < / span > < span class = "p" > :< / span > < span class = "s2" > " /account" < / span >
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< span class = "p" > },< / span >
< span class = "p" > {< / span >
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< span class = "nt" > " :scheme" < / span > < span class = "p" > :< / span > < span class = "s2" > " https" < / span >
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< span class = "p" > },< / span >
< span class = "p" > {< / span >
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< span class = "nt" > " user-agent" < / span > < span class = "p" > :< / span > < span class = "s2" > " nghttp2" < / span >
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< span class = "p" > }< / span >
< span class = "p" > ],< / span >
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< span class = "nt" > " header_table_size" < / span > < span class = "p" > :< / span > < span class = "mi" > 4096< / span >
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< span class = "p" > }< / span >
< span class = "p" > ]< / span >
< span class = "p" > }< / span >
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< / pre > < / div >
< / div >
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< p > The output can be used as the input for < tt class = "docutils literal" > < span class = "pre" > inflatehd< / span > < / tt > and
< tt class = "docutils literal" > < span class = "pre" > deflatehd< / span > < / tt > .< / p >
< p > With < tt class = "docutils literal" > < span class = "pre" > -d< / span > < / tt > option, the extra < tt class = "docutils literal" > < span class = "pre" > header_table< / span > < / tt > key is added and its
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associated value includes the state of dynamic header table after the
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corresponding header set was processed. The value includes at least
the following keys:< / p >
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< dl class = "docutils" >
< dt > entries< / dt >
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< dd > The entry in the header table. If < tt class = "docutils literal" > < span class = "pre" > referenced< / span > < / tt > is < tt class = "docutils literal" > < span class = "pre" > true< / span > < / tt > , it
is in the reference set. The < tt class = "docutils literal" > < span class = "pre" > size< / span > < / tt > includes the overhead (32
bytes). The < tt class = "docutils literal" > < span class = "pre" > index< / span > < / tt > corresponds to the index of header table.
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The < tt class = "docutils literal" > < span class = "pre" > name< / span > < / tt > is the header field name and the < tt class = "docutils literal" > < span class = "pre" > value< / span > < / tt > is the
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header field value.< / dd >
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< dt > size< / dt >
< dd > The sum of the spaces entries occupied, this includes the
entry overhead.< / dd >
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< dt > max_size< / dt >
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< dd > The maximum header table size.< / dd >
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< dt > deflate_size< / dt >
< dd > The sum of the spaces entries occupied within
< tt class = "docutils literal" > < span class = "pre" > max_deflate_size< / span > < / tt > .< / dd >
< dt > max_deflate_size< / dt >
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< dd > The maximum header table size encoder uses. This can be smaller
than < tt class = "docutils literal" > < span class = "pre" > max_size< / span > < / tt > . In this case, encoder only uses up to first
< tt class = "docutils literal" > < span class = "pre" > max_deflate_size< / span > < / tt > buffer. Since the header table size is still
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< tt class = "docutils literal" > < span class = "pre" > max_size< / span > < / tt > , the encoder has to keep track of entries ouside the
< tt class = "docutils literal" > < span class = "pre" > max_deflate_size< / span > < / tt > but inside the < tt class = "docutils literal" > < span class = "pre" > max_size< / span > < / tt > and make sure
that they are no longer referenced.< / dd >
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< / dl >
< p > Example:< / p >
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< div class = "highlight-json" > < div class = "highlight" > < pre > < span class = "p" > {< / span >
< span class = "nt" > " cases" < / span > < span class = "p" > :< / span >
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< span class = "p" > [< / span >
< span class = "p" > {< / span >
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< span class = "nt" > " seq" < / span > < span class = "p" > :< / span > < span class = "mi" > 0< / span > < span class = "p" > ,< / span >
< span class = "nt" > " input_length" < / span > < span class = "p" > :< / span > < span class = "mi" > 66< / span > < span class = "p" > ,< / span >
< span class = "nt" > " output_length" < / span > < span class = "p" > :< / span > < span class = "mi" > 20< / span > < span class = "p" > ,< / span >
< span class = "nt" > " percentage_of_original_size" < / span > < span class = "p" > :< / span > < span class = "mf" > 30.303030303030305< / span > < span class = "p" > ,< / span >
< span class = "nt" > " wire" < / span > < span class = "p" > :< / span > < span class = "s2" > " 01881f3468e5891afcbf83868a3d856659c62e3f" < / span > < span class = "p" > ,< / span >
< span class = "nt" > " headers" < / span > < span class = "p" > :< / span > < span class = "p" > [< / span >
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< span class = "p" > {< / span >
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< span class = "nt" > " :authority" < / span > < span class = "p" > :< / span > < span class = "s2" > " example.org" < / span >
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< span class = "p" > },< / span >
< span class = "p" > {< / span >
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< span class = "nt" > " :method" < / span > < span class = "p" > :< / span > < span class = "s2" > " GET" < / span >
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< span class = "p" > },< / span >
< span class = "p" > {< / span >
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< span class = "nt" > " :path" < / span > < span class = "p" > :< / span > < span class = "s2" > " /" < / span >
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< span class = "p" > },< / span >
< span class = "p" > {< / span >
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< span class = "nt" > " :scheme" < / span > < span class = "p" > :< / span > < span class = "s2" > " https" < / span >
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< span class = "p" > },< / span >
< span class = "p" > {< / span >
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< span class = "nt" > " user-agent" < / span > < span class = "p" > :< / span > < span class = "s2" > " nghttp2" < / span >
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< span class = "p" > }< / span >
< span class = "p" > ],< / span >
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< span class = "nt" > " header_table_size" < / span > < span class = "p" > :< / span > < span class = "mi" > 4096< / span > < span class = "p" > ,< / span >
< span class = "nt" > " header_table" < / span > < span class = "p" > :< / span > < span class = "p" > {< / span >
< span class = "nt" > " entries" < / span > < span class = "p" > :< / span > < span class = "p" > [< / span >
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< span class = "p" > {< / span >
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< span class = "nt" > " index" < / span > < span class = "p" > :< / span > < span class = "mi" > 1< / span > < span class = "p" > ,< / span >
< span class = "nt" > " name" < / span > < span class = "p" > :< / span > < span class = "s2" > " user-agent" < / span > < span class = "p" > ,< / span >
< span class = "nt" > " value" < / span > < span class = "p" > :< / span > < span class = "s2" > " nghttp2" < / span > < span class = "p" > ,< / span >
< span class = "nt" > " referenced" < / span > < span class = "p" > :< / span > < span class = "kc" > true< / span > < span class = "p" > ,< / span >
< span class = "nt" > " size" < / span > < span class = "p" > :< / span > < span class = "mi" > 49< / span >
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< span class = "p" > },< / span >
< span class = "p" > {< / span >
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< span class = "nt" > " index" < / span > < span class = "p" > :< / span > < span class = "mi" > 2< / span > < span class = "p" > ,< / span >
< span class = "nt" > " name" < / span > < span class = "p" > :< / span > < span class = "s2" > " :scheme" < / span > < span class = "p" > ,< / span >
< span class = "nt" > " value" < / span > < span class = "p" > :< / span > < span class = "s2" > " https" < / span > < span class = "p" > ,< / span >
< span class = "nt" > " referenced" < / span > < span class = "p" > :< / span > < span class = "kc" > true< / span > < span class = "p" > ,< / span >
< span class = "nt" > " size" < / span > < span class = "p" > :< / span > < span class = "mi" > 44< / span >
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< span class = "p" > },< / span >
< span class = "p" > {< / span >
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< span class = "nt" > " index" < / span > < span class = "p" > :< / span > < span class = "mi" > 3< / span > < span class = "p" > ,< / span >
< span class = "nt" > " name" < / span > < span class = "p" > :< / span > < span class = "s2" > " :path" < / span > < span class = "p" > ,< / span >
< span class = "nt" > " value" < / span > < span class = "p" > :< / span > < span class = "s2" > " /" < / span > < span class = "p" > ,< / span >
< span class = "nt" > " referenced" < / span > < span class = "p" > :< / span > < span class = "kc" > true< / span > < span class = "p" > ,< / span >
< span class = "nt" > " size" < / span > < span class = "p" > :< / span > < span class = "mi" > 38< / span >
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< span class = "p" > },< / span >
< span class = "p" > {< / span >
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< span class = "nt" > " index" < / span > < span class = "p" > :< / span > < span class = "mi" > 4< / span > < span class = "p" > ,< / span >
< span class = "nt" > " name" < / span > < span class = "p" > :< / span > < span class = "s2" > " :method" < / span > < span class = "p" > ,< / span >
< span class = "nt" > " value" < / span > < span class = "p" > :< / span > < span class = "s2" > " GET" < / span > < span class = "p" > ,< / span >
< span class = "nt" > " referenced" < / span > < span class = "p" > :< / span > < span class = "kc" > true< / span > < span class = "p" > ,< / span >
< span class = "nt" > " size" < / span > < span class = "p" > :< / span > < span class = "mi" > 42< / span >
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< span class = "p" > },< / span >
< span class = "p" > {< / span >
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< span class = "nt" > " index" < / span > < span class = "p" > :< / span > < span class = "mi" > 5< / span > < span class = "p" > ,< / span >
< span class = "nt" > " name" < / span > < span class = "p" > :< / span > < span class = "s2" > " :authority" < / span > < span class = "p" > ,< / span >
< span class = "nt" > " value" < / span > < span class = "p" > :< / span > < span class = "s2" > " example.org" < / span > < span class = "p" > ,< / span >
< span class = "nt" > " referenced" < / span > < span class = "p" > :< / span > < span class = "kc" > true< / span > < span class = "p" > ,< / span >
< span class = "nt" > " size" < / span > < span class = "p" > :< / span > < span class = "mi" > 53< / span >
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< span class = "p" > }< / span >
< span class = "p" > ],< / span >
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< span class = "nt" > " size" < / span > < span class = "p" > :< / span > < span class = "mi" > 226< / span > < span class = "p" > ,< / span >
< span class = "nt" > " max_size" < / span > < span class = "p" > :< / span > < span class = "mi" > 4096< / span > < span class = "p" > ,< / span >
< span class = "nt" > " deflate_size" < / span > < span class = "p" > :< / span > < span class = "mi" > 226< / span > < span class = "p" > ,< / span >
< span class = "nt" > " max_deflate_size" < / span > < span class = "p" > :< / span > < span class = "mi" > 4096< / span >
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< span class = "p" > }< / span >
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< span class = "p" > }< / span >
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< span class = "p" > ,< / span >
< span class = "p" > {< / span >
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< span class = "nt" > " seq" < / span > < span class = "p" > :< / span > < span class = "mi" > 1< / span > < span class = "p" > ,< / span >
< span class = "nt" > " input_length" < / span > < span class = "p" > :< / span > < span class = "mi" > 74< / span > < span class = "p" > ,< / span >
< span class = "nt" > " output_length" < / span > < span class = "p" > :< / span > < span class = "mi" > 10< / span > < span class = "p" > ,< / span >
< span class = "nt" > " percentage_of_original_size" < / span > < span class = "p" > :< / span > < span class = "mf" > 13.513513513513514< / span > < span class = "p" > ,< / span >
< span class = "nt" > " wire" < / span > < span class = "p" > :< / span > < span class = "s2" > " 88448504252dd5918485" < / span > < span class = "p" > ,< / span >
< span class = "nt" > " headers" < / span > < span class = "p" > :< / span > < span class = "p" > [< / span >
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< span class = "p" > {< / span >
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< span class = "nt" > " :authority" < / span > < span class = "p" > :< / span > < span class = "s2" > " example.org" < / span >
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< span class = "p" > },< / span >
< span class = "p" > {< / span >
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< span class = "nt" > " :method" < / span > < span class = "p" > :< / span > < span class = "s2" > " POST" < / span >
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< span class = "p" > },< / span >
< span class = "p" > {< / span >
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< span class = "nt" > " :path" < / span > < span class = "p" > :< / span > < span class = "s2" > " /account" < / span >
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< span class = "p" > },< / span >
< span class = "p" > {< / span >
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< span class = "nt" > " :scheme" < / span > < span class = "p" > :< / span > < span class = "s2" > " https" < / span >
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< span class = "p" > },< / span >
< span class = "p" > {< / span >
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< span class = "nt" > " user-agent" < / span > < span class = "p" > :< / span > < span class = "s2" > " nghttp2" < / span >
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< span class = "p" > }< / span >
< span class = "p" > ],< / span >
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< span class = "nt" > " header_table_size" < / span > < span class = "p" > :< / span > < span class = "mi" > 4096< / span > < span class = "p" > ,< / span >
< span class = "nt" > " header_table" < / span > < span class = "p" > :< / span > < span class = "p" > {< / span >
< span class = "nt" > " entries" < / span > < span class = "p" > :< / span > < span class = "p" > [< / span >
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< span class = "p" > {< / span >
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< span class = "nt" > " index" < / span > < span class = "p" > :< / span > < span class = "mi" > 1< / span > < span class = "p" > ,< / span >
< span class = "nt" > " name" < / span > < span class = "p" > :< / span > < span class = "s2" > " :method" < / span > < span class = "p" > ,< / span >
< span class = "nt" > " value" < / span > < span class = "p" > :< / span > < span class = "s2" > " POST" < / span > < span class = "p" > ,< / span >
< span class = "nt" > " referenced" < / span > < span class = "p" > :< / span > < span class = "kc" > true< / span > < span class = "p" > ,< / span >
< span class = "nt" > " size" < / span > < span class = "p" > :< / span > < span class = "mi" > 43< / span >
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< span class = "p" > },< / span >
< span class = "p" > {< / span >
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< span class = "nt" > " index" < / span > < span class = "p" > :< / span > < span class = "mi" > 2< / span > < span class = "p" > ,< / span >
< span class = "nt" > " name" < / span > < span class = "p" > :< / span > < span class = "s2" > " user-agent" < / span > < span class = "p" > ,< / span >
< span class = "nt" > " value" < / span > < span class = "p" > :< / span > < span class = "s2" > " nghttp2" < / span > < span class = "p" > ,< / span >
< span class = "nt" > " referenced" < / span > < span class = "p" > :< / span > < span class = "kc" > true< / span > < span class = "p" > ,< / span >
< span class = "nt" > " size" < / span > < span class = "p" > :< / span > < span class = "mi" > 49< / span >
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< span class = "p" > },< / span >
< span class = "p" > {< / span >
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< span class = "nt" > " index" < / span > < span class = "p" > :< / span > < span class = "mi" > 3< / span > < span class = "p" > ,< / span >
< span class = "nt" > " name" < / span > < span class = "p" > :< / span > < span class = "s2" > " :scheme" < / span > < span class = "p" > ,< / span >
< span class = "nt" > " value" < / span > < span class = "p" > :< / span > < span class = "s2" > " https" < / span > < span class = "p" > ,< / span >
< span class = "nt" > " referenced" < / span > < span class = "p" > :< / span > < span class = "kc" > true< / span > < span class = "p" > ,< / span >
< span class = "nt" > " size" < / span > < span class = "p" > :< / span > < span class = "mi" > 44< / span >
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< span class = "p" > },< / span >
< span class = "p" > {< / span >
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< span class = "nt" > " index" < / span > < span class = "p" > :< / span > < span class = "mi" > 4< / span > < span class = "p" > ,< / span >
< span class = "nt" > " name" < / span > < span class = "p" > :< / span > < span class = "s2" > " :path" < / span > < span class = "p" > ,< / span >
< span class = "nt" > " value" < / span > < span class = "p" > :< / span > < span class = "s2" > " /" < / span > < span class = "p" > ,< / span >
< span class = "nt" > " referenced" < / span > < span class = "p" > :< / span > < span class = "kc" > false< / span > < span class = "p" > ,< / span >
< span class = "nt" > " size" < / span > < span class = "p" > :< / span > < span class = "mi" > 38< / span >
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< span class = "p" > },< / span >
< span class = "p" > {< / span >
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< span class = "nt" > " index" < / span > < span class = "p" > :< / span > < span class = "mi" > 5< / span > < span class = "p" > ,< / span >
< span class = "nt" > " name" < / span > < span class = "p" > :< / span > < span class = "s2" > " :method" < / span > < span class = "p" > ,< / span >
< span class = "nt" > " value" < / span > < span class = "p" > :< / span > < span class = "s2" > " GET" < / span > < span class = "p" > ,< / span >
< span class = "nt" > " referenced" < / span > < span class = "p" > :< / span > < span class = "kc" > false< / span > < span class = "p" > ,< / span >
< span class = "nt" > " size" < / span > < span class = "p" > :< / span > < span class = "mi" > 42< / span >
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< span class = "p" > },< / span >
< span class = "p" > {< / span >
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< span class = "nt" > " index" < / span > < span class = "p" > :< / span > < span class = "mi" > 6< / span > < span class = "p" > ,< / span >
< span class = "nt" > " name" < / span > < span class = "p" > :< / span > < span class = "s2" > " :authority" < / span > < span class = "p" > ,< / span >
< span class = "nt" > " value" < / span > < span class = "p" > :< / span > < span class = "s2" > " example.org" < / span > < span class = "p" > ,< / span >
< span class = "nt" > " referenced" < / span > < span class = "p" > :< / span > < span class = "kc" > true< / span > < span class = "p" > ,< / span >
< span class = "nt" > " size" < / span > < span class = "p" > :< / span > < span class = "mi" > 53< / span >
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< span class = "p" > }< / span >
< span class = "p" > ],< / span >
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< span class = "nt" > " size" < / span > < span class = "p" > :< / span > < span class = "mi" > 269< / span > < span class = "p" > ,< / span >
< span class = "nt" > " max_size" < / span > < span class = "p" > :< / span > < span class = "mi" > 4096< / span > < span class = "p" > ,< / span >
< span class = "nt" > " deflate_size" < / span > < span class = "p" > :< / span > < span class = "mi" > 269< / span > < span class = "p" > ,< / span >
< span class = "nt" > " max_deflate_size" < / span > < span class = "p" > :< / span > < span class = "mi" > 4096< / span >
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< span class = "p" > }< / span >
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< span class = "p" > }< / span >
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< span class = "p" > ]< / span >
< span class = "p" > }< / span >
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< / pre > < / div >
< / div >
< / div >
< div class = "section" id = "inflatehd-header-decompressor" >
< h3 > inflatehd - header decompressor< a class = "headerlink" href = "#inflatehd-header-decompressor" title = "Permalink to this headline" > ¶< / a > < / h3 >
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< p > The < tt class = "docutils literal" > < span class = "pre" > inflatehd< / span > < / tt > reads JSON data from stdin and outputs decompressed
name/value pairs in JSON.< / p >
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< p > The root JSON object must include < tt class = "docutils literal" > < span class = "pre" > cases< / span > < / tt > key. Its value has to
include the sequence of compressed header block. They share the same
compression context and are processed in the order they appear. Each
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item in the sequence is a JSON object and it must have at least
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< tt class = "docutils literal" > < span class = "pre" > wire< / span > < / tt > key. Its value is a compressed header block in hex string.< / p >
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< p > Example:< / p >
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< div class = "highlight-json" > < div class = "highlight" > < pre > < span class = "p" > {< / span >
< span class = "nt" > " cases" < / span > < span class = "p" > :< / span >
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< span class = "p" > [< / span >
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< span class = "p" > {< / span > < span class = "nt" > " wire" < / span > < span class = "p" > :< / span > < span class = "s2" > " 8285" < / span > < span class = "p" > },< / span >
< span class = "p" > {< / span > < span class = "nt" > " wire" < / span > < span class = "p" > :< / span > < span class = "s2" > " 8583" < / span > < span class = "p" > }< / span >
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< span class = "p" > ]< / span >
< span class = "p" > }< / span >
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< / pre > < / div >
< / div >
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< p > The output is JSON object. It should include < tt class = "docutils literal" > < span class = "pre" > cases< / span > < / tt > key and its
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value is an array of JSON object, which has at least following keys:< / p >
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< dl class = "docutils" >
< dt > seq< / dt >
< dd > The index of header set in the input.< / dd >
< dt > headers< / dt >
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< dd > The JSON array includes decompressed name/value pairs.< / dd >
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< dt > wire< / dt >
< dd > The compressed header block in hex string.< / dd >
< dt > header_table_size< / dt >
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< dd > The header table size adjusted before inflating compressed header
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block.< / dd >
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< / dl >
< p > Example:< / p >
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< div class = "highlight-json" > < div class = "highlight" > < pre > < span class = "p" > {< / span >
< span class = "nt" > " cases" < / span > < span class = "p" > :< / span >
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< span class = "p" > [< / span >
< span class = "p" > {< / span >
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< span class = "nt" > " seq" < / span > < span class = "p" > :< / span > < span class = "mi" > 0< / span > < span class = "p" > ,< / span >
< span class = "nt" > " wire" < / span > < span class = "p" > :< / span > < span class = "s2" > " 01881f3468e5891afcbf83868a3d856659c62e3f" < / span > < span class = "p" > ,< / span >
< span class = "nt" > " headers" < / span > < span class = "p" > :< / span > < span class = "p" > [< / span >
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< span class = "p" > {< / span >
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< span class = "nt" > " :authority" < / span > < span class = "p" > :< / span > < span class = "s2" > " example.org" < / span >
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< span class = "p" > },< / span >
< span class = "p" > {< / span >
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< span class = "nt" > " :method" < / span > < span class = "p" > :< / span > < span class = "s2" > " GET" < / span >
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< span class = "p" > },< / span >
< span class = "p" > {< / span >
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< span class = "nt" > " :path" < / span > < span class = "p" > :< / span > < span class = "s2" > " /" < / span >
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< span class = "p" > },< / span >
< span class = "p" > {< / span >
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< span class = "nt" > " :scheme" < / span > < span class = "p" > :< / span > < span class = "s2" > " https" < / span >
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< span class = "p" > },< / span >
< span class = "p" > {< / span >
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< span class = "nt" > " user-agent" < / span > < span class = "p" > :< / span > < span class = "s2" > " nghttp2" < / span >
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< span class = "p" > }< / span >
< span class = "p" > ],< / span >
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< span class = "nt" > " header_table_size" < / span > < span class = "p" > :< / span > < span class = "mi" > 4096< / span >
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< span class = "p" > }< / span >
< span class = "p" > ,< / span >
< span class = "p" > {< / span >
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< span class = "nt" > " seq" < / span > < span class = "p" > :< / span > < span class = "mi" > 1< / span > < span class = "p" > ,< / span >
< span class = "nt" > " wire" < / span > < span class = "p" > :< / span > < span class = "s2" > " 88448504252dd5918485" < / span > < span class = "p" > ,< / span >
< span class = "nt" > " headers" < / span > < span class = "p" > :< / span > < span class = "p" > [< / span >
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< span class = "p" > {< / span >
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< span class = "nt" > " :method" < / span > < span class = "p" > :< / span > < span class = "s2" > " POST" < / span >
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< span class = "p" > },< / span >
< span class = "p" > {< / span >
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< span class = "nt" > " :path" < / span > < span class = "p" > :< / span > < span class = "s2" > " /account" < / span >
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< span class = "p" > },< / span >
< span class = "p" > {< / span >
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< span class = "nt" > " user-agent" < / span > < span class = "p" > :< / span > < span class = "s2" > " nghttp2" < / span >
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< span class = "p" > },< / span >
< span class = "p" > {< / span >
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< span class = "nt" > " :scheme" < / span > < span class = "p" > :< / span > < span class = "s2" > " https" < / span >
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< span class = "p" > },< / span >
< span class = "p" > {< / span >
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< span class = "nt" > " :authority" < / span > < span class = "p" > :< / span > < span class = "s2" > " example.org" < / span >
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< span class = "p" > }< / span >
< span class = "p" > ],< / span >
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< span class = "nt" > " header_table_size" < / span > < span class = "p" > :< / span > < span class = "mi" > 4096< / span >
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< span class = "p" > }< / span >
< span class = "p" > ]< / span >
< span class = "p" > }< / span >
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< / pre > < / div >
< / div >
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< p > The output can be used as the input for < tt class = "docutils literal" > < span class = "pre" > deflatehd< / span > < / tt > and
< tt class = "docutils literal" > < span class = "pre" > inflatehd< / span > < / tt > .< / p >
< p > With < tt class = "docutils literal" > < span class = "pre" > -d< / span > < / tt > option, the extra < tt class = "docutils literal" > < span class = "pre" > header_table< / span > < / tt > key is added and its
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associated value includes the state of dynamic header table after the
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corresponding header set was processed. The format is the same as
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< tt class = "docutils literal" > < span class = "pre" > deflatehd< / span > < / tt > .< / p >
< / div >
< / div >
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< div class = "section" id = "libnghttp2-asio-high-level-http-2-c-library" >
< h2 > libnghttp2_asio: High level HTTP/2 C++ library< a class = "headerlink" href = "#libnghttp2-asio-high-level-http-2-c-library" title = "Permalink to this headline" > ¶< / a > < / h2 >
< p > libnghttp2_asio is C++ library built on top of libnghttp2 and provides
high level abstraction API to build HTTP/2 applications. It depends
on Boost::ASIO library and OpenSSL. Currently libnghttp2_asio
provides server side API.< / p >
< p > libnghttp2_asio is not built by default. Use < tt class = "docutils literal" > < span class = "pre" > --enable-asio-lib< / span > < / tt >
configure flag to build libnghttp2_asio. The required Boost libraries
are:< / p >
< ul class = "simple" >
< li > Boost::Asio< / li >
< li > Boost::System< / li >
< li > Boost::Thread< / li >
< / ul >
< p > Server API is designed to build HTTP/2 server very easily to utilize
C++11 anonymous function and closure. The bare minimum example of
HTTP/2 server looks like this:< / p >
< div class = "highlight-cpp" > < div class = "highlight" > < pre > < span class = "cp" > #include < nghttp2/asio_http2.h> < / span >
< span class = "k" > using< / span > < span class = "k" > namespace< / span > < span class = "n" > nghttp2< / span > < span class = "o" > ::< / span > < span class = "n" > asio_http2< / span > < span class = "p" > ;< / span >
< span class = "k" > using< / span > < span class = "k" > namespace< / span > < span class = "n" > nghttp2< / span > < span class = "o" > ::< / span > < span class = "n" > asio_http2< / span > < span class = "o" > ::< / span > < span class = "n" > server< / span > < span class = "p" > ;< / span >
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< span class = "kt" > int< / span > < span class = "nf" > main< / span > < span class = "p" > (< / span > < span class = "kt" > int< / span > < span class = "n" > argc< / span > < span class = "p" > ,< / span > < span class = "kt" > char< / span > < span class = "o" > *< / span > < span class = "n" > argv< / span > < span class = "p" > [])< / span > < span class = "p" > {< / span >
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< span class = "n" > http2< / span > < span class = "n" > server< / span > < span class = "p" > ;< / span >
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< span class = "n" > server< / span > < span class = "p" > .< / span > < span class = "n" > listen< / span > < span class = "p" > (< / span > < span class = "s" > " *" < / span > < span class = "p" > ,< / span > < span class = "mi" > 3000< / span > < span class = "p" > ,< / span > < span class = "p" > [](< / span > < span class = "k" > const< / span > < span class = "n" > std< / span > < span class = "o" > ::< / span > < span class = "n" > shared_ptr< / span > < span class = "o" > < < / span > < span class = "n" > request< / span > < span class = "o" > > < / span > < span class = "o" > & < / span > < span class = "n" > req< / span > < span class = "p" > ,< / span >
< span class = "k" > const< / span > < span class = "n" > std< / span > < span class = "o" > ::< / span > < span class = "n" > shared_ptr< / span > < span class = "o" > < < / span > < span class = "n" > response< / span > < span class = "o" > > < / span > < span class = "o" > & < / span > < span class = "n" > res< / span > < span class = "p" > )< / span > < span class = "p" > {< / span >
< span class = "n" > res< / span > < span class = "o" > -> < / span > < span class = "n" > write_head< / span > < span class = "p" > (< / span > < span class = "mi" > 200< / span > < span class = "p" > );< / span >
< span class = "n" > res< / span > < span class = "o" > -> < / span > < span class = "n" > end< / span > < span class = "p" > (< / span > < span class = "s" > " hello, world" < / span > < span class = "p" > );< / span >
< span class = "p" > });< / span >
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< span class = "p" > }< / span >
< / pre > < / div >
< / div >
< p > For more details, see the documentation of libnghttp2_asio.< / p >
< / div >
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< div class = "section" id = "python-bindings" >
< h2 > Python bindings< a class = "headerlink" href = "#python-bindings" title = "Permalink to this headline" > ¶< / a > < / h2 >
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< p > This < tt class = "docutils literal" > < span class = "pre" > python< / span > < / tt > directory contains nghttp2 Python bindings. The
bindings currently provide HPACK compressor and decompressor classes
and HTTP/2 server.< / p >
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< p > The extension module is called < tt class = "docutils literal" > < span class = "pre" > nghttp2< / span > < / tt > .< / p >
< p > < tt class = "docutils literal" > < span class = "pre" > make< / span > < / tt > will build the bindings and target Python version is
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determined by configure script. If the detected Python version is not
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what you expect, specify a path to Python executable in < tt class = "docutils literal" > < span class = "pre" > PYTHON< / span > < / tt >
variable as an argument to configure script (e.g., < tt class = "docutils literal" > < span class = "pre" > ./configure< / span >
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< span class = "pre" > PYTHON=/usr/bin/python3.4< / span > < / tt > ).< / p >
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< p > The following example code illustrates basic usage of HPACK compressor
and decompressor in Python:< / p >
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< div class = "highlight-python" > < div class = "highlight" > < pre > < span class = "kn" > import< / span > < span class = "nn" > binascii< / span >
< span class = "kn" > import< / span > < span class = "nn" > nghttp2< / span >
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< span class = "n" > deflater< / span > < span class = "o" > =< / span > < span class = "n" > nghttp2< / span > < span class = "o" > .< / span > < span class = "n" > HDDeflater< / span > < span class = "p" > ()< / span >
< span class = "n" > inflater< / span > < span class = "o" > =< / span > < span class = "n" > nghttp2< / span > < span class = "o" > .< / span > < span class = "n" > HDInflater< / span > < span class = "p" > ()< / span >
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< span class = "n" > data< / span > < span class = "o" > =< / span > < span class = "n" > deflater< / span > < span class = "o" > .< / span > < span class = "n" > deflate< / span > < span class = "p" > ([(< / span > < span class = "n" > b< / span > < span class = "s" > ' foo' < / span > < span class = "p" > ,< / span > < span class = "n" > b< / span > < span class = "s" > ' bar' < / span > < span class = "p" > ),< / span >
< span class = "p" > (< / span > < span class = "n" > b< / span > < span class = "s" > ' baz' < / span > < span class = "p" > ,< / span > < span class = "n" > b< / span > < span class = "s" > ' buz' < / span > < span class = "p" > )])< / span >
< span class = "k" > print< / span > < span class = "p" > (< / span > < span class = "n" > binascii< / span > < span class = "o" > .< / span > < span class = "n" > b2a_hex< / span > < span class = "p" > (< / span > < span class = "n" > data< / span > < span class = "p" > ))< / span >
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< span class = "n" > hdrs< / span > < span class = "o" > =< / span > < span class = "n" > inflater< / span > < span class = "o" > .< / span > < span class = "n" > inflate< / span > < span class = "p" > (< / span > < span class = "n" > data< / span > < span class = "p" > )< / span >
< span class = "k" > print< / span > < span class = "p" > (< / span > < span class = "n" > hdrs< / span > < span class = "p" > )< / span >
< / pre > < / div >
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< / div >
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< p > The < tt class = "docutils literal" > < span class = "pre" > nghttp2.HTTP2Server< / span > < / tt > class builds on top of the asyncio event
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loop. On construction, < em > RequestHandlerClass< / em > must be given, which
must be a subclass of < tt class = "docutils literal" > < span class = "pre" > nghttp2.BaseRequestHandler< / span > < / tt > class.< / p >
< p > The < tt class = "docutils literal" > < span class = "pre" > BaseRequestHandler< / span > < / tt > class is used to handle the HTTP/2 stream.
By default, it does nothing. It must be subclassed to handle each
event callback method.< / p >
< p > The first callback method invoked is < tt class = "docutils literal" > < span class = "pre" > on_headers()< / span > < / tt > . It is called
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when HEADERS frame, which includes request header fields, has arrived.< / p >
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< p > If request has request body, < tt class = "docutils literal" > < span class = "pre" > on_data(data)< / span > < / tt > is invoked for each
chunk of received data.< / p >
< p > When whole request is received, < tt class = "docutils literal" > < span class = "pre" > on_request_done()< / span > < / tt > is invoked.< / p >
< p > When stream is closed, < tt class = "docutils literal" > < span class = "pre" > on_close(error_code)< / span > < / tt > is called.< / p >
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< p > The application can send response using < tt class = "docutils literal" > < span class = "pre" > send_response()< / span > < / tt > method.
It can be used in < tt class = "docutils literal" > < span class = "pre" > on_headers()< / span > < / tt > , < tt class = "docutils literal" > < span class = "pre" > on_data()< / span > < / tt > or
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< tt class = "docutils literal" > < span class = "pre" > on_request_done()< / span > < / tt > .< / p >
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< p > The application can push resource using < tt class = "docutils literal" > < span class = "pre" > push()< / span > < / tt > method. It must be
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used before < tt class = "docutils literal" > < span class = "pre" > send_response()< / span > < / tt > call.< / p >
< p > The following instance variables are available:< / p >
< dl class = "docutils" >
< dt > client_address< / dt >
< dd > Contains a tuple of the form (host, port) referring to the
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client's address.< / dd >
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< dt > stream_id< / dt >
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< dd > Stream ID of this stream.< / dd >
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< dt > scheme< / dt >
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< dd > Scheme of the request URI. This is a value of :scheme header
field.< / dd >
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< dt > method< / dt >
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< dd > Method of this stream. This is a value of :method header field.< / dd >
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< dt > host< / dt >
< dd > This is a value of :authority or host header field.< / dd >
< dt > path< / dt >
< dd > This is a value of :path header field.< / dd >
< / dl >
< p > The following example illustrates the HTTP2Server and
BaseRequestHandler usage:< / p >
< div class = "highlight-python" > < div class = "highlight" > < pre > < span class = "c" > #!/usr/bin/env python< / span >
< span class = "kn" > import< / span > < span class = "nn" > io< / span > < span class = "o" > ,< / span > < span class = "nn" > ssl< / span >
< span class = "kn" > import< / span > < span class = "nn" > nghttp2< / span >
< span class = "k" > class< / span > < span class = "nc" > Handler< / span > < span class = "p" > (< / span > < span class = "n" > nghttp2< / span > < span class = "o" > .< / span > < span class = "n" > BaseRequestHandler< / span > < span class = "p" > ):< / span >
< span class = "k" > def< / span > < span class = "nf" > on_headers< / span > < span class = "p" > (< / span > < span class = "bp" > self< / span > < span class = "p" > ):< / span >
< span class = "bp" > self< / span > < span class = "o" > .< / span > < span class = "n" > push< / span > < span class = "p" > (< / span > < span class = "n" > path< / span > < span class = "o" > =< / span > < span class = "s" > ' /css/bootstrap.css' < / span > < span class = "p" > ,< / span >
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< span class = "n" > request_headers< / span > < span class = "o" > =< / span > < span class = "p" > [(< / span > < span class = "s" > ' content-length' < / span > < span class = "p" > ,< / span > < span class = "s" > ' 3' < / span > < span class = "p" > )],< / span >
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< span class = "n" > status< / span > < span class = "o" > =< / span > < span class = "mi" > 200< / span > < span class = "p" > ,< / span >
< span class = "n" > body< / span > < span class = "o" > =< / span > < span class = "s" > ' foo' < / span > < span class = "p" > )< / span >
< span class = "bp" > self< / span > < span class = "o" > .< / span > < span class = "n" > push< / span > < span class = "p" > (< / span > < span class = "n" > path< / span > < span class = "o" > =< / span > < span class = "s" > ' /js/bootstrap.js' < / span > < span class = "p" > ,< / span >
< span class = "n" > method< / span > < span class = "o" > =< / span > < span class = "s" > ' GET' < / span > < span class = "p" > ,< / span >
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< span class = "n" > request_headers< / span > < span class = "o" > =< / span > < span class = "p" > [(< / span > < span class = "s" > ' content-length' < / span > < span class = "p" > ,< / span > < span class = "s" > ' 10' < / span > < span class = "p" > )],< / span >
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< span class = "n" > status< / span > < span class = "o" > =< / span > < span class = "mi" > 200< / span > < span class = "p" > ,< / span >
< span class = "n" > body< / span > < span class = "o" > =< / span > < span class = "s" > ' foobarbuzz' < / span > < span class = "p" > )< / span >
< span class = "bp" > self< / span > < span class = "o" > .< / span > < span class = "n" > send_response< / span > < span class = "p" > (< / span > < span class = "n" > status< / span > < span class = "o" > =< / span > < span class = "mi" > 200< / span > < span class = "p" > ,< / span >
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< span class = "n" > headers< / span > < span class = "o" > =< / span > < span class = "p" > [(< / span > < span class = "s" > ' content-type' < / span > < span class = "p" > ,< / span > < span class = "s" > ' text/plain' < / span > < span class = "p" > )],< / span >
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< span class = "n" > body< / span > < span class = "o" > =< / span > < span class = "n" > io< / span > < span class = "o" > .< / span > < span class = "n" > BytesIO< / span > < span class = "p" > (< / span > < span class = "n" > b< / span > < span class = "s" > ' nghttp2-python FTW' < / span > < span class = "p" > ))< / span >
< span class = "n" > ctx< / span > < span class = "o" > =< / span > < span class = "n" > ssl< / span > < span class = "o" > .< / span > < span class = "n" > SSLContext< / span > < span class = "p" > (< / span > < span class = "n" > ssl< / span > < span class = "o" > .< / span > < span class = "n" > PROTOCOL_SSLv23< / span > < span class = "p" > )< / span >
< span class = "n" > ctx< / span > < span class = "o" > .< / span > < span class = "n" > options< / span > < span class = "o" > =< / span > < span class = "n" > ssl< / span > < span class = "o" > .< / span > < span class = "n" > OP_ALL< / span > < span class = "o" > |< / span > < span class = "n" > ssl< / span > < span class = "o" > .< / span > < span class = "n" > OP_NO_SSLv2< / span >
< span class = "n" > ctx< / span > < span class = "o" > .< / span > < span class = "n" > load_cert_chain< / span > < span class = "p" > (< / span > < span class = "s" > ' server.crt' < / span > < span class = "p" > ,< / span > < span class = "s" > ' server.key' < / span > < span class = "p" > )< / span >
< span class = "c" > # give None to ssl to make the server non-SSL/TLS< / span >
< span class = "n" > server< / span > < span class = "o" > =< / span > < span class = "n" > nghttp2< / span > < span class = "o" > .< / span > < span class = "n" > HTTP2Server< / span > < span class = "p" > ((< / span > < span class = "s" > ' 127.0.0.1' < / span > < span class = "p" > ,< / span > < span class = "mi" > 8443< / span > < span class = "p" > ),< / span > < span class = "n" > Handler< / span > < span class = "p" > ,< / span > < span class = "n" > ssl< / span > < span class = "o" > =< / span > < span class = "n" > ctx< / span > < span class = "p" > )< / span >
< span class = "n" > server< / span > < span class = "o" > .< / span > < span class = "n" > serve_forever< / span > < span class = "p" > ()< / span >
< / pre > < / div >
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< / div >
< / div >
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< div class = "section" id = "contribution" >
< h2 > Contribution< a class = "headerlink" href = "#contribution" title = "Permalink to this headline" > ¶< / a > < / h2 >
< p > [This text was composed based on 1.2. License section of curl/libcurl
project.]< / p >
< p > When contributing with code, you agree to put your changes and new
code under the same license nghttp2 is already using unless stated and
agreed otherwise.< / p >
< p > When changing existing source code, you do not alter the copyright of
the original file(s). The copyright will still be owned by the
original creator(s) or those who have been assigned copyright by the
original author(s).< / p >
< p > By submitting a patch to the nghttp2 project, you are assumed to have
the right to the code and to be allowed by your employer or whatever
to hand over that patch/code to us. We will credit you for your
changes as far as possible, to give credit but also to keep a trace
back to who made what changes. Please always provide us with your
full real name when contributing!< / p >
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< p > See < a class = "reference external" href = "https://nghttp2.org/documentation/contribute.html" > Contribution Guidelines< / a > for more
details.< / p >
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< / div >
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< / div >
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< / div >
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< footer >
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< div class = "rst-footer-buttons" role = "navigation" aria-label = "footer navigation" >
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< a href = "contribute.html" class = "btn btn-neutral float-right" title = "Contribution Guidelines" > Next < span class = "fa fa-arrow-circle-right" > < / span > < / a >
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< a href = "index.html" class = "btn btn-neutral" title = "nghttp2 - HTTP/2 C Library" > < span class = "fa fa-arrow-circle-left" > < / span > Previous< / a >
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< / div >
< hr / >
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< div role = "contentinfo" >
< p >
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© Copyright 2012, 2015, Tatsuhiro Tsujikawa.
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< / p >
< / div >
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Built with < a href = "http://sphinx-doc.org/" > Sphinx< / a > using a < a href = "https://github.com/snide/sphinx_rtd_theme" > theme< / a > provided by < a href = "https://readthedocs.org" > Read the Docs< / a > .
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< / footer >
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< / div >
< / div >
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< / section >
< / div >
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< script type = "text/javascript" >
var DOCUMENTATION_OPTIONS = {
URL_ROOT:'./',
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VERSION:'0.7.2-DEV',
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COLLAPSE_INDEX:false,
FILE_SUFFIX:'.html',
HAS_SOURCE: false
};
< / script >
< script type = "text/javascript" src = "_static/jquery.js" > < / script >
< script type = "text/javascript" src = "_static/underscore.js" > < / script >
< script type = "text/javascript" src = "_static/doctools.js" > < / script >
< script type = "text/javascript" src = "_static/js/theme.js" > < / script >
< script type = "text/javascript" >
jQuery(function () {
SphinxRtdTheme.StickyNav.enable();
});
< / script >
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< / body >
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< / html >
