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<div class="section" id="asio-http2-h">
<h1>asio_http2.h<a class="headerlink" href="#asio-http2-h" title="Permalink to this headline"></a></h1>
<div class="highlight-cpp"><div class="highlight"><pre><span class="cm">/*</span>
<span class="cm"> * nghttp2 - HTTP/2 C Library</span>
<span class="cm"> *</span>
<span class="cm"> * Copyright (c) 2014 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"> * &quot;Software&quot;), 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 &quot;AS IS&quot;, 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_H</span>
<span class="cp">#define ASIO_HTTP2_H</span>
<span class="cp">#include &lt;cstdint&gt;</span>
<span class="cp">#include &lt;memory&gt;</span>
<span class="cp">#include &lt;string&gt;</span>
<span class="cp">#include &lt;vector&gt;</span>
<span class="cp">#include &lt;functional&gt;</span>
<span class="cp">#include &lt;map&gt;</span>
<span class="cp">#include &lt;boost/system/error_code.hpp&gt;</span>
<span class="cp">#include &lt;boost/asio.hpp&gt;</span>
<span class="cp">#include &lt;boost/asio/ssl.hpp&gt;</span>
<span class="cp">#include &lt;nghttp2/nghttp2.h&gt;</span>
<span class="k">namespace</span> <span class="n">boost</span> <span class="p">{</span>
<span class="k">namespace</span> <span class="n">system</span> <span class="p">{</span>
<span class="k">template</span> <span class="o">&lt;&gt;</span> <span class="k">struct</span> <span class="n">is_error_code_enum</span><span class="o">&lt;</span><span class="n">nghttp2_error</span><span class="o">&gt;</span> <span class="p">{</span>
<span class="n">BOOST_STATIC_CONSTANT</span><span class="p">(</span><span class="kt">bool</span><span class="p">,</span> <span class="n">value</span> <span class="o">=</span> <span class="nb">true</span><span class="p">);</span>
<span class="p">};</span>
<span class="p">}</span> <span class="c1">// namespace system</span>
<span class="p">}</span> <span class="c1">// namespace boost</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">struct</span> <span class="n">header_value</span> <span class="p">{</span>
<span class="c1">// header field value</span>
<span class="n">std</span><span class="o">::</span><span class="n">string</span> <span class="n">value</span><span class="p">;</span>
<span class="c1">// true if the header field value is sensitive information, such as</span>
<span class="c1">// authorization information or short length secret cookies. If</span>
<span class="c1">// true, those header fields are not indexed by HPACK (but still</span>
<span class="c1">// huffman-encoded), which results in lesser compression.</span>
<span class="kt">bool</span> <span class="n">sensitive</span><span class="p">;</span>
<span class="p">};</span>
<span class="c1">// header fields. The header field name must be lower-cased.</span>
<span class="k">using</span> <span class="n">header_map</span> <span class="o">=</span> <span class="n">std</span><span class="o">::</span><span class="n">multimap</span><span class="o">&lt;</span><span class="n">std</span><span class="o">::</span><span class="n">string</span><span class="p">,</span> <span class="n">header_value</span><span class="o">&gt;</span><span class="p">;</span>
<span class="k">const</span> <span class="n">boost</span><span class="o">::</span><span class="n">system</span><span class="o">::</span><span class="n">error_category</span> <span class="o">&amp;</span><span class="n">nghttp2_category</span><span class="p">()</span> <span class="k">noexcept</span><span class="p">;</span>
<span class="k">struct</span> <span class="n">uri_ref</span> <span class="p">{</span>
<span class="n">std</span><span class="o">::</span><span class="n">string</span> <span class="n">scheme</span><span class="p">;</span>
<span class="n">std</span><span class="o">::</span><span class="n">string</span> <span class="n">host</span><span class="p">;</span>
<span class="c1">// form after percent-encoding decoded</span>
<span class="n">std</span><span class="o">::</span><span class="n">string</span> <span class="n">path</span><span class="p">;</span>
<span class="c1">// original path, percent-encoded</span>
<span class="n">std</span><span class="o">::</span><span class="n">string</span> <span class="n">raw_path</span><span class="p">;</span>
<span class="c1">// original query, percent-encoded</span>
<span class="n">std</span><span class="o">::</span><span class="n">string</span> <span class="n">raw_query</span><span class="p">;</span>
<span class="n">std</span><span class="o">::</span><span class="n">string</span> <span class="n">fragment</span><span class="p">;</span>
<span class="p">};</span>
<span class="c1">// Callback function when data is arrived. EOF is indicated by</span>
<span class="c1">// passing 0 to the second parameter.</span>
<span class="k">typedef</span> <span class="n">std</span><span class="o">::</span><span class="n">function</span><span class="o">&lt;</span><span class="kt">void</span><span class="p">(</span><span class="k">const</span> <span class="kt">uint8_t</span> <span class="o">*</span><span class="p">,</span> <span class="n">std</span><span class="o">::</span><span class="kt">size_t</span><span class="p">)</span><span class="o">&gt;</span> <span class="n">data_cb</span><span class="p">;</span>
<span class="k">typedef</span> <span class="n">std</span><span class="o">::</span><span class="n">function</span><span class="o">&lt;</span><span class="kt">void</span><span class="p">(</span><span class="kt">void</span><span class="p">)</span><span class="o">&gt;</span> <span class="n">void_cb</span><span class="p">;</span>
<span class="k">typedef</span> <span class="n">std</span><span class="o">::</span><span class="n">function</span><span class="o">&lt;</span><span class="kt">void</span><span class="p">(</span><span class="k">const</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">&amp;</span><span class="n">ec</span><span class="p">)</span><span class="o">&gt;</span> <span class="n">error_cb</span><span class="p">;</span>
<span class="c1">// Callback function when request and response are finished. The</span>
<span class="c1">// parameter indicates the cause of closure.</span>
<span class="k">typedef</span> <span class="n">std</span><span class="o">::</span><span class="n">function</span><span class="o">&lt;</span><span class="kt">void</span><span class="p">(</span><span class="kt">uint32_t</span><span class="p">)</span><span class="o">&gt;</span> <span class="n">close_cb</span><span class="p">;</span>
<span class="c1">// Callback function to generate response body. This function has the</span>
<span class="c1">// same semantics with nghttp2_data_source_read_callback. Just source</span>
<span class="c1">// and user_data parameters are removed.</span>
<span class="c1">//</span>
<span class="c1">// Basically, write at most |len| bytes to |data| and returns the</span>
<span class="c1">// number of bytes written. If there is no data left to send, set</span>
<span class="c1">// NGHTTP2_DATA_FLAG_EOF to *data_flags (e.g., *data_flags |=</span>
<span class="c1">// NGHTTP2_DATA_FLAG_EOF). If there is still data to send but they</span>
<span class="c1">// are not available right now, return NGHTTP2_ERR_DEFERRED. In case</span>
<span class="c1">// of the error and request/response must be closed, return</span>
<span class="c1">// NGHTTP2_ERR_TEMPORAL_CALLBACK_FAILURE.</span>
<span class="k">typedef</span> <span class="n">std</span><span class="o">::</span><span class="n">function</span><span class="o">&lt;</span>
<span class="kt">ssize_t</span><span class="p">(</span><span class="kt">uint8_t</span> <span class="o">*</span><span class="n">buf</span><span class="p">,</span> <span class="n">std</span><span class="o">::</span><span class="kt">size_t</span> <span class="n">len</span><span class="p">,</span> <span class="kt">uint32_t</span> <span class="o">*</span><span class="n">data_flags</span><span class="p">)</span><span class="o">&gt;</span> <span class="n">generator_cb</span><span class="p">;</span>
<span class="c1">// Convenient function to create function to read file denoted by</span>
<span class="c1">// |path|. This can be passed to response::end().</span>
<span class="n">generator_cb</span> <span class="nf">file_generator</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">&amp;</span><span class="n">path</span><span class="p">);</span>
<span class="c1">// Like file_generator(const std::string&amp;), but it takes opened file</span>
<span class="c1">// descriptor. The passed descriptor will be closed when returned</span>
<span class="c1">// function object is destroyed.</span>
<span class="n">generator_cb</span> <span class="nf">file_generator_from_fd</span><span class="p">(</span><span class="kt">int</span> <span class="n">fd</span><span class="p">);</span>
<span class="c1">// Validates path so that it does not contain directory traversal</span>
<span class="c1">// vector. Returns true if path is safe. The |path| must start with</span>
<span class="c1">// &quot;/&quot; otherwise returns false. This function should be called after</span>
<span class="c1">// percent-decode was performed.</span>
<span class="kt">bool</span> <span class="nf">check_path</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">&amp;</span><span class="n">path</span><span class="p">);</span>
<span class="c1">// Performs percent-decode against string |s|.</span>
<span class="n">std</span><span class="o">::</span><span class="n">string</span> <span class="n">percent_decode</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">&amp;</span><span class="n">s</span><span class="p">);</span>
<span class="c1">// Returns HTTP date representation of current posix time |t|.</span>
<span class="n">std</span><span class="o">::</span><span class="n">string</span> <span class="n">http_date</span><span class="p">(</span><span class="kt">int64_t</span> <span class="n">t</span><span class="p">);</span>
<span class="c1">// Parses |uri| and extract scheme, host and service. The service is</span>
<span class="c1">// port component of URI (e.g., &quot;8443&quot;) if available, otherwise it is</span>
<span class="c1">// scheme (e.g., &quot;https&quot;).</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">host_service_from_uri</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">&amp;</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="o">&amp;</span><span class="n">scheme</span><span class="p">,</span>
<span class="n">std</span><span class="o">::</span><span class="n">string</span> <span class="o">&amp;</span><span class="n">host</span><span class="p">,</span>
<span class="n">std</span><span class="o">::</span><span class="n">string</span> <span class="o">&amp;</span><span class="n">service</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">&amp;</span><span class="n">uri</span><span class="p">);</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_H</span>
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