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<div class="section" id="asio-http2-server-h">
<h1>asio_http2_server.h<a class="headerlink" href="#asio-http2-server-h" title="Permalink to this headline">¶</a></h1>
<div class="highlight-cpp notranslate"><div class="highlight"><pre><span></span><span class="cm">/*</span>
<span class="cm"> * nghttp2 - HTTP/2 C Library</span>
<span class="cm"> *</span>
<span class="cm"> * Copyright (c) 2015 Tatsuhiro Tsujikawa</span>
<span class="cm"> *</span>
<span class="cm"> * Permission is hereby granted, free of charge, to any person obtaining</span>
<span class="cm"> * a copy of this software and associated documentation files (the</span>
<span class="cm"> * "Software"), to deal in the Software without restriction, including</span>
<span class="cm"> * without limitation the rights to use, copy, modify, merge, publish,</span>
<span class="cm"> * distribute, sublicense, and/or sell copies of the Software, and to</span>
<span class="cm"> * permit persons to whom the Software is furnished to do so, subject to</span>
<span class="cm"> * the following conditions:</span>
<span class="cm"> *</span>
<span class="cm"> * The above copyright notice and this permission notice shall be</span>
<span class="cm"> * included in all copies or substantial portions of the Software.</span>
<span class="cm"> *</span>
<span class="cm"> * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,</span>
<span class="cm"> * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF</span>
<span class="cm"> * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND</span>
<span class="cm"> * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE</span>
<span class="cm"> * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION</span>
<span class="cm"> * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION</span>
<span class="cm"> * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.</span>
<span class="cm"> */</span>
<span class="cp">#ifndef ASIO_HTTP2_SERVER_H</span>
<span class="cp">#define ASIO_HTTP2_SERVER_H</span>
<span class="cp">#include</span> <span class="cpf"><nghttp2/asio_http2.h></span><span class="cp"></span>
<span class="k">namespace</span> <span class="n">nghttp2</span> <span class="p">{</span>
<span class="k">namespace</span> <span class="n">asio_http2</span> <span class="p">{</span>
<span class="k">namespace</span> <span class="n">server</span> <span class="p">{</span>
<span class="k">class</span> <span class="nc">request_impl</span><span class="p">;</span>
<span class="k">class</span> <span class="nc">response_impl</span><span class="p">;</span>
<span class="k">class</span> <span class="nc">request</span> <span class="p">{</span>
<span class="k">public</span><span class="o">:</span>
<span class="c1">// Application must not call this directly.</span>
<span class="n">request</span><span class="p">();</span>
<span class="o">~</span><span class="n">request</span><span class="p">();</span>
<span class="c1">// Returns request header fields. The pusedo header fields, which</span>
<span class="c1">// start with colon (:), are exluced from this list.</span>
<span class="k">const</span> <span class="n">header_map</span> <span class="o">&</span><span class="n">header</span><span class="p">()</span> <span class="k">const</span><span class="p">;</span>
<span class="c1">// Returns method (e.g., GET).</span>
<span class="k">const</span> <span class="n">std</span><span class="o">::</span><span class="n">string</span> <span class="o">&</span><span class="n">method</span><span class="p">()</span> <span class="k">const</span><span class="p">;</span>
<span class="c1">// Returns request URI, split into components.</span>
<span class="k">const</span> <span class="n">uri_ref</span> <span class="o">&</span><span class="n">uri</span><span class="p">()</span> <span class="k">const</span><span class="p">;</span>
<span class="c1">// Sets callback which is invoked when chunk of request body is</span>
<span class="c1">// received.</span>
<span class="kt">void</span> <span class="nf">on_data</span><span class="p">(</span><span class="n">data_cb</span> <span class="n">cb</span><span class="p">)</span> <span class="k">const</span><span class="p">;</span>
<span class="c1">// Application must not call this directly.</span>
<span class="n">request_impl</span> <span class="o">&</span><span class="n">impl</span><span class="p">()</span> <span class="k">const</span><span class="p">;</span>
<span class="c1">// Returns the remote endpoint of the request</span>
<span class="k">const</span> <span class="n">boost</span><span class="o">::</span><span class="n">asio</span><span class="o">::</span><span class="n">ip</span><span class="o">::</span><span class="n">tcp</span><span class="o">::</span><span class="n">endpoint</span> <span class="o">&</span><span class="n">remote_endpoint</span><span class="p">()</span> <span class="k">const</span><span class="p">;</span>
<span class="k">private</span><span class="o">:</span>
<span class="n">std</span><span class="o">::</span><span class="n">unique_ptr</span><span class="o"><</span><span class="n">request_impl</span><span class="o">></span> <span class="n">impl_</span><span class="p">;</span>
<span class="p">};</span>
<span class="k">class</span> <span class="nc">response</span> <span class="p">{</span>
<span class="k">public</span><span class="o">:</span>
<span class="c1">// Application must not call this directly.</span>
<span class="n">response</span><span class="p">();</span>
<span class="o">~</span><span class="n">response</span><span class="p">();</span>
<span class="c1">// Write response header using |status_code| (e.g., 200) and</span>
<span class="c1">// additional header fields in |h|.</span>
<span class="kt">void</span> <span class="nf">write_head</span><span class="p">(</span><span class="kt">unsigned</span> <span class="kt">int</span> <span class="n">status_code</span><span class="p">,</span> <span class="n">header_map</span> <span class="n">h</span> <span class="o">=</span> <span class="n">header_map</span><span class="p">{})</span> <span class="k">const</span><span class="p">;</span>
<span class="c1">// Sends |data| as request body. No further call of end() is</span>
<span class="c1">// allowed.</span>
<span class="kt">void</span> <span class="nf">end</span><span class="p">(</span><span class="n">std</span><span class="o">::</span><span class="n">string</span> <span class="n">data</span> <span class="o">=</span> <span class="s">""</span><span class="p">)</span> <span class="k">const</span><span class="p">;</span>
<span class="c1">// Sets callback as a generator of the response body. No further</span>
<span class="c1">// call of end() is allowed.</span>
<span class="kt">void</span> <span class="nf">end</span><span class="p">(</span><span class="n">generator_cb</span> <span class="n">cb</span><span class="p">)</span> <span class="k">const</span><span class="p">;</span>
<span class="c1">// Write trailer part. This must be called after setting both</span>
<span class="c1">// NGHTTP2_DATA_FLAG_EOF and NGHTTP2_DATA_FLAG_NO_END_STREAM set in</span>
<span class="c1">// *data_flag parameter in generator_cb passed to end() function.</span>
<span class="kt">void</span> <span class="nf">write_trailer</span><span class="p">(</span><span class="n">header_map</span> <span class="n">h</span><span class="p">)</span> <span class="k">const</span><span class="p">;</span>
<span class="c1">// Sets callback which is invoked when this request and response are</span>
<span class="c1">// finished. After the invocation of this callback, the application</span>
<span class="c1">// must not access request and response object.</span>
<span class="kt">void</span> <span class="nf">on_close</span><span class="p">(</span><span class="n">close_cb</span> <span class="n">cb</span><span class="p">)</span> <span class="k">const</span><span class="p">;</span>
<span class="c1">// Cancels this request and response with given error code.</span>
<span class="kt">void</span> <span class="nf">cancel</span><span class="p">(</span><span class="kt">uint32_t</span> <span class="n">error_code</span> <span class="o">=</span> <span class="n">NGHTTP2_INTERNAL_ERROR</span><span class="p">)</span> <span class="k">const</span><span class="p">;</span>
<span class="c1">// Resumes deferred response.</span>
<span class="kt">void</span> <span class="nf">resume</span><span class="p">()</span> <span class="k">const</span><span class="p">;</span>
<span class="c1">// Pushes resource denoted by |raw_path_query| using |method|. The</span>
<span class="c1">// additional header fields can be given in |h|. This function</span>
<span class="c1">// returns pointer to response object for promised stream, otherwise</span>
<span class="c1">// nullptr and error code is filled in |ec|. Be aware that the</span>
<span class="c1">// header field name given in |h| must be lower-cased.</span>
<span class="k">const</span> <span class="n">response</span> <span class="o">*</span><span class="nf">push</span><span class="p">(</span><span class="n">boost</span><span class="o">::</span><span class="n">system</span><span class="o">::</span><span class="n">error_code</span> <span class="o">&</span><span class="n">ec</span><span class="p">,</span> <span class="n">std</span><span class="o">::</span><span class="n">string</span> <span class="n">method</span><span class="p">,</span>
<span class="n">std</span><span class="o">::</span><span class="n">string</span> <span class="n">raw_path_query</span><span class="p">,</span>
<span class="n">header_map</span> <span class="n">h</span> <span class="o">=</span> <span class="n">header_map</span><span class="p">{})</span> <span class="k">const</span><span class="p">;</span>
<span class="c1">// Returns status code.</span>
<span class="kt">unsigned</span> <span class="kt">int</span> <span class="nf">status_code</span><span class="p">()</span> <span class="k">const</span><span class="p">;</span>
<span class="c1">// Returns boost::asio::io_service this response is running on.</span>
<span class="n">boost</span><span class="o">::</span><span class="n">asio</span><span class="o">::</span><span class="n">io_service</span> <span class="o">&</span><span class="n">io_service</span><span class="p">()</span> <span class="k">const</span><span class="p">;</span>
<span class="c1">// Application must not call this directly.</span>
<span class="n">response_impl</span> <span class="o">&</span><span class="n">impl</span><span class="p">()</span> <span class="k">const</span><span class="p">;</span>
<span class="k">private</span><span class="o">:</span>
<span class="n">std</span><span class="o">::</span><span class="n">unique_ptr</span><span class="o"><</span><span class="n">response_impl</span><span class="o">></span> <span class="n">impl_</span><span class="p">;</span>
<span class="p">};</span>
<span class="c1">// This is so called request callback. Called every time request is</span>
<span class="c1">// received. The life time of |request| and |response| objects end</span>
<span class="c1">// when callback set by response::on_close() is called. After that,</span>
<span class="c1">// the application must not access to those objects.</span>
<span class="k">typedef</span> <span class="n">std</span><span class="o">::</span><span class="n">function</span><span class="o"><</span><span class="kt">void</span><span class="p">(</span><span class="k">const</span> <span class="n">request</span> <span class="o">&</span><span class="p">,</span> <span class="k">const</span> <span class="n">response</span> <span class="o">&</span><span class="p">)</span><span class="o">></span> <span class="n">request_cb</span><span class="p">;</span>
<span class="k">class</span> <span class="nc">http2_impl</span><span class="p">;</span>
<span class="k">class</span> <span class="nc">http2</span> <span class="p">{</span>
<span class="k">public</span><span class="o">:</span>
<span class="n">http2</span><span class="p">();</span>
<span class="o">~</span><span class="n">http2</span><span class="p">();</span>
<span class="n">http2</span><span class="p">(</span><span class="n">http2</span> <span class="o">&&</span><span class="n">other</span><span class="p">)</span> <span class="k">noexcept</span><span class="p">;</span>
<span class="n">http2</span> <span class="o">&</span><span class="k">operator</span><span class="o">=</span><span class="p">(</span><span class="n">http2</span> <span class="o">&&</span><span class="n">other</span><span class="p">)</span> <span class="k">noexcept</span><span class="p">;</span>
<span class="c1">// Starts listening connection on given address and port and serves</span>
<span class="c1">// incoming requests in cleartext TCP connection. If |asynchronous|</span>
<span class="c1">// is false, this function blocks forever unless there is an error.</span>
<span class="c1">// If it is true, after server has started, this function returns</span>
<span class="c1">// immediately, and the caller should call stop() and join() to</span>
<span class="c1">// shutdown server gracefully.</span>
<span class="n">boost</span><span class="o">::</span><span class="n">system</span><span class="o">::</span><span class="n">error_code</span> <span class="n">listen_and_serve</span><span class="p">(</span><span class="n">boost</span><span class="o">::</span><span class="n">system</span><span class="o">::</span><span class="n">error_code</span> <span class="o">&</span><span class="n">ec</span><span class="p">,</span>
<span class="k">const</span> <span class="n">std</span><span class="o">::</span><span class="n">string</span> <span class="o">&</span><span class="n">address</span><span class="p">,</span>
<span class="k">const</span> <span class="n">std</span><span class="o">::</span><span class="n">string</span> <span class="o">&</span><span class="n">port</span><span class="p">,</span>
<span class="kt">bool</span> <span class="n">asynchronous</span> <span class="o">=</span> <span class="nb">false</span><span class="p">);</span>
<span class="c1">// Starts listening connection on given address and port and serves</span>
<span class="c1">// incoming requests in SSL/TLS encrypted connection. For</span>
<span class="c1">// |asynchronous| parameter, see cleartext version</span>
<span class="c1">// |listen_and_serve|.</span>
<span class="n">boost</span><span class="o">::</span><span class="n">system</span><span class="o">::</span><span class="n">error_code</span>
<span class="n">listen_and_serve</span><span class="p">(</span><span class="n">boost</span><span class="o">::</span><span class="n">system</span><span class="o">::</span><span class="n">error_code</span> <span class="o">&</span><span class="n">ec</span><span class="p">,</span>
<span class="n">boost</span><span class="o">::</span><span class="n">asio</span><span class="o">::</span><span class="n">ssl</span><span class="o">::</span><span class="n">context</span> <span class="o">&</span><span class="n">tls_context</span><span class="p">,</span>
<span class="k">const</span> <span class="n">std</span><span class="o">::</span><span class="n">string</span> <span class="o">&</span><span class="n">address</span><span class="p">,</span> <span class="k">const</span> <span class="n">std</span><span class="o">::</span><span class="n">string</span> <span class="o">&</span><span class="n">port</span><span class="p">,</span>
<span class="kt">bool</span> <span class="n">asynchronous</span> <span class="o">=</span> <span class="nb">false</span><span class="p">);</span>
<span class="c1">// Registers request handler |cb| with path pattern |pattern|. This</span>
<span class="c1">// function will fail and returns false if same pattern has been</span>
<span class="c1">// already registered or |pattern| is empty string. Otherwise</span>
<span class="c1">// returns true. The pattern match rule is the same as</span>
<span class="c1">// net/http/ServeMux in golang. Quoted from golang manual</span>
<span class="c1">// (http://golang.org/pkg/net/http/#ServeMux):</span>
<span class="c1">//</span>
<span class="c1">// Patterns name fixed, rooted paths, like "/favicon.ico", or</span>
<span class="c1">// rooted subtrees, like "/images/" (note the trailing</span>
<span class="c1">// slash). Longer patterns take precedence over shorter ones, so</span>
<span class="c1">// that if there are handlers registered for both "/images/" and</span>
<span class="c1">// "/images/thumbnails/", the latter handler will be called for</span>
<span class="c1">// paths beginning "/images/thumbnails/" and the former will</span>
<span class="c1">// receive requests for any other paths in the "/images/" subtree.</span>
<span class="c1">//</span>
<span class="c1">// Note that since a pattern ending in a slash names a rooted</span>
<span class="c1">// subtree, the pattern "/" matches all paths not matched by other</span>
<span class="c1">// registered patterns, not just the URL with Path == "/".</span>
<span class="c1">//</span>
<span class="c1">// Patterns may optionally begin with a host name, restricting</span>
<span class="c1">// matches to URLs on that host only. Host-specific patterns take</span>
<span class="c1">// precedence over general patterns, so that a handler might</span>
<span class="c1">// register for the two patterns "/codesearch" and</span>
<span class="c1">// "codesearch.google.com/" without also taking over requests for</span>
<span class="c1">// "http://www.google.com/".</span>
<span class="c1">//</span>
<span class="c1">// Just like ServeMux in golang, URL request path is sanitized and</span>
<span class="c1">// if they contains . or .. elements, they are redirected to an</span>
<span class="c1">// equivalent .- and ..-free URL.</span>
<span class="kt">bool</span> <span class="nf">handle</span><span class="p">(</span><span class="n">std</span><span class="o">::</span><span class="n">string</span> <span class="n">pattern</span><span class="p">,</span> <span class="n">request_cb</span> <span class="n">cb</span><span class="p">);</span>
<span class="c1">// Sets number of native threads to handle incoming HTTP request.</span>
<span class="c1">// It defaults to 1.</span>
<span class="kt">void</span> <span class="nf">num_threads</span><span class="p">(</span><span class="kt">size_t</span> <span class="n">num_threads</span><span class="p">);</span>
<span class="c1">// Sets the maximum length to which the queue of pending</span>
<span class="c1">// connections.</span>
<span class="kt">void</span> <span class="nf">backlog</span><span class="p">(</span><span class="kt">int</span> <span class="n">backlog</span><span class="p">);</span>
<span class="c1">// Sets TLS handshake timeout, which defaults to 60 seconds.</span>
<span class="kt">void</span> <span class="nf">tls_handshake_timeout</span><span class="p">(</span><span class="k">const</span> <span class="n">boost</span><span class="o">::</span><span class="n">posix_time</span><span class="o">::</span><span class="n">time_duration</span> <span class="o">&</span><span class="n">t</span><span class="p">);</span>
<span class="c1">// Sets read timeout, which defaults to 60 seconds.</span>
<span class="kt">void</span> <span class="nf">read_timeout</span><span class="p">(</span><span class="k">const</span> <span class="n">boost</span><span class="o">::</span><span class="n">posix_time</span><span class="o">::</span><span class="n">time_duration</span> <span class="o">&</span><span class="n">t</span><span class="p">);</span>
<span class="c1">// Gracefully stop http2 server</span>
<span class="kt">void</span> <span class="nf">stop</span><span class="p">();</span>
<span class="c1">// Join on http2 server and wait for it to fully stop</span>
<span class="kt">void</span> <span class="nf">join</span><span class="p">();</span>
<span class="c1">// Get access to the io_service objects.</span>
<span class="k">const</span> <span class="n">std</span><span class="o">::</span><span class="n">vector</span><span class="o"><</span><span class="n">std</span><span class="o">::</span><span class="n">shared_ptr</span><span class="o"><</span><span class="n">boost</span><span class="o">::</span><span class="n">asio</span><span class="o">::</span><span class="n">io_service</span><span class="o">>></span> <span class="o">&</span>
<span class="n">io_services</span><span class="p">()</span> <span class="k">const</span><span class="p">;</span>
<span class="c1">// Returns a vector with the ports in use</span>
<span class="n">std</span><span class="o">::</span><span class="n">vector</span><span class="o"><</span><span class="kt">int</span><span class="o">></span> <span class="n">ports</span><span class="p">()</span> <span class="k">const</span><span class="p">;</span>
<span class="k">private</span><span class="o">:</span>
<span class="n">std</span><span class="o">::</span><span class="n">unique_ptr</span><span class="o"><</span><span class="n">http2_impl</span><span class="o">></span> <span class="n">impl_</span><span class="p">;</span>
<span class="p">};</span>
<span class="c1">// Configures |tls_context| for server use. This function sets couple</span>
<span class="c1">// of OpenSSL options (disables SSLv2 and SSLv3 and compression) and</span>
<span class="c1">// enables ECDHE ciphers. NPN callback is also configured.</span>
<span class="n">boost</span><span class="o">::</span><span class="n">system</span><span class="o">::</span><span class="n">error_code</span>
<span class="n">configure_tls_context_easy</span><span class="p">(</span><span class="n">boost</span><span class="o">::</span><span class="n">system</span><span class="o">::</span><span class="n">error_code</span> <span class="o">&</span><span class="n">ec</span><span class="p">,</span>
<span class="n">boost</span><span class="o">::</span><span class="n">asio</span><span class="o">::</span><span class="n">ssl</span><span class="o">::</span><span class="n">context</span> <span class="o">&</span><span class="n">tls_context</span><span class="p">);</span>
<span class="c1">// Returns request handler to do redirect to |uri| using</span>
<span class="c1">// |status_code|. The |uri| appears in "location" header field as is.</span>
<span class="n">request_cb</span> <span class="nf">redirect_handler</span><span class="p">(</span><span class="kt">int</span> <span class="n">status_code</span><span class="p">,</span> <span class="n">std</span><span class="o">::</span><span class="n">string</span> <span class="n">uri</span><span class="p">);</span>
<span class="c1">// Returns request handler to reply with given |status_code| and HTML</span>
<span class="c1">// including message about status code.</span>
<span class="n">request_cb</span> <span class="nf">status_handler</span><span class="p">(</span><span class="kt">int</span> <span class="n">status_code</span><span class="p">);</span>
<span class="p">}</span> <span class="c1">// namespace server</span>
<span class="p">}</span> <span class="c1">// namespace asio_http2</span>
<span class="p">}</span> <span class="c1">// namespace nghttp2</span>
<span class="cp">#endif </span><span class="c1">// ASIO_HTTP2_SERVER_H</span>
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