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Tatsuhiro Tsujikawa 2014-01-11 17:08:37 +09:00
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@ -588,38 +588,41 @@ the outside HTTP/2.0 proxy through HTTP proxy:</p>
command-line header compression tool. The <tt class="docutils literal"><span class="pre">inflatehd</span></tt> is
command-line header decompression tool. Both tools read input from
stdin and write output to stdout. The errors are written to
stderr. They take JSON as input and output.</p>
stderr. They take JSON as input and output. We use the same JSON data
format used in <a class="reference external" href="https://github.com/Jxck/hpack-test-case">https://github.com/Jxck/hpack-test-case</a></p>
<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>
<p>The <tt class="docutils literal"><span class="pre">deflatehd</span></tt> reads JSON array or HTTP/1-style header fields from
stdin and outputs compressed header block in JSON array.</p>
<p>For the JSON input, the element of input array must be a JSON
object. Each object must have at least following key:</p>
<dl class="docutils">
<dt>headers</dt>
<dd>A JSON array of name/value pairs. The each element is a JSON array
of 2 strings. The index 0 must contain header name and the index 1
must contain header value.</dd>
</dl>
<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>
<p>For the JSON input, the root JSON object must contain <tt class="docutils literal"><span class="pre">context</span></tt> key,
which indicates which compression context is used. If it is
<tt class="docutils literal"><span class="pre">request</span></tt>, request compression context is used. Otherwise, response
compression context is used. The value of <tt class="docutils literal"><span class="pre">cases</span></tt> key contains the
sequence of input header set. They share the same compression context
and are processed in the order they appear. Each item in the sequence
is a JSON object and it must have at least <tt class="docutils literal"><span class="pre">headers</span></tt> key. Its value
is an array of a JSON object containing exactly one name/value pair.</p>
<p>Example:</p>
<div class="highlight-c"><div class="highlight"><pre><span class="p">[</span>
<div class="highlight-c"><div class="highlight"><pre><span class="p">{</span>
<span class="s">&quot;context&quot;</span><span class="o">:</span> <span class="s">&quot;request&quot;</span><span class="p">,</span>
<span class="s">&quot;cases&quot;</span><span class="o">:</span>
<span class="p">[</span>
<span class="p">{</span>
<span class="s">&quot;headers&quot;</span><span class="o">:</span> <span class="p">[</span>
<span class="p">[</span> <span class="s">&quot;:method&quot;</span><span class="p">,</span> <span class="s">&quot;GET&quot;</span> <span class="p">],</span>
<span class="p">[</span> <span class="s">&quot;:path&quot;</span><span class="p">,</span> <span class="s">&quot;/&quot;</span> <span class="p">]</span>
<span class="p">{</span> <span class="s">&quot;:method&quot;</span><span class="o">:</span> <span class="s">&quot;GET&quot;</span> <span class="p">},</span>
<span class="p">{</span> <span class="s">&quot;:path&quot;</span><span class="o">:</span> <span class="s">&quot;/&quot;</span> <span class="p">}</span>
<span class="p">]</span>
<span class="p">},</span>
<span class="p">{</span>
<span class="s">&quot;headers&quot;</span><span class="o">:</span> <span class="p">[</span>
<span class="p">[</span> <span class="s">&quot;:method&quot;</span><span class="p">,</span> <span class="s">&quot;POST&quot;</span> <span class="p">],</span>
<span class="p">[</span> <span class="s">&quot;:path&quot;</span><span class="p">,</span> <span class="s">&quot;/&quot;</span> <span class="p">]</span>
<span class="p">{</span> <span class="s">&quot;:method&quot;</span><span class="o">:</span> <span class="s">&quot;POST&quot;</span> <span class="p">},</span>
<span class="p">{</span> <span class="s">&quot;:path&quot;</span><span class="o">:</span> <span class="s">&quot;/&quot;</span> <span class="p">}</span>
<span class="p">]</span>
<span class="p">}</span>
<span class="p">]</span>
<span class="p">}</span>
</pre></div>
</div>
<p>These header sets are processed in the order they appear in the JSON
outer most array using same compression context.</p>
<p>With <tt class="docutils literal"><span class="pre">-t</span></tt> option, the program can accept more familiar HTTP/1 style
header field block. Each header set is delimited by empty line:</p>
<p>Example:</p>
@ -631,41 +634,89 @@ header field block. Each header set is delimited by empty line:</p>
<span class="n">user</span><span class="o">-</span><span class="n">agent</span><span class="o">:</span> <span class="n">nghttp2</span>
</pre></div>
</div>
<p>The output is a JSON array and each element is JSON object, which has
at least following keys:</p>
<p>The output is JSON object. It contains <tt class="docutils literal"><span class="pre">context</span></tt> key and its value
is <tt class="docutils literal"><span class="pre">request</span></tt> if the compression context is request, otherwise
<tt class="docutils literal"><span class="pre">response</span></tt>. The root JSON object also contains <tt class="docutils literal"><span class="pre">cases</span></tt> key and its
value is an array of JSON object, which has at least following keys:</p>
<dl class="docutils">
<dt>seq</dt>
<dd>The index of header set in the input.</dd>
<dt>inputLen</dt>
<dt>input_length</dt>
<dd>The sum of length of name/value pair in the input.</dd>
<dt>outputLength</dt>
<dt>output_length</dt>
<dd>The length of compressed header block.</dd>
<dt>percentageOfOriginalSize</dt>
<dd>inputLen / outputLength * 100</dd>
<dt>output</dt>
<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>
<dd>The compressed header block in hex string.</dd>
<dt>headers</dt>
<dd>The input header set.</dd>
<dt>header_table_size</dt>
<dd>The header table size adjsuted before deflating header set.</dd>
</dl>
<p>Examples:</p>
<div class="highlight-c"><div class="highlight"><pre><span class="p">[</span>
<div class="highlight-c"><div class="highlight"><pre><span class="p">{</span>
<span class="s">&quot;context&quot;</span><span class="o">:</span> <span class="s">&quot;request&quot;</span><span class="p">,</span>
<span class="s">&quot;cases&quot;</span><span class="o">:</span>
<span class="p">[</span>
<span class="p">{</span>
<span class="s">&quot;seq&quot;</span><span class="o">:</span> <span class="mi">0</span><span class="p">,</span>
<span class="s">&quot;inputLen&quot;</span><span class="o">:</span> <span class="mi">66</span><span class="p">,</span>
<span class="s">&quot;outputLength&quot;</span><span class="o">:</span> <span class="mi">20</span><span class="p">,</span>
<span class="s">&quot;percentageOfOriginalSize&quot;</span><span class="o">:</span> <span class="mf">30.303030303030305</span><span class="p">,</span>
<span class="s">&quot;output&quot;</span><span class="o">:</span> <span class="s">&quot;818703881f3468e5891afcbf863c856659c62e3f&quot;</span>
<span class="s">&quot;input_length&quot;</span><span class="o">:</span> <span class="mi">66</span><span class="p">,</span>
<span class="s">&quot;output_length&quot;</span><span class="o">:</span> <span class="mi">20</span><span class="p">,</span>
<span class="s">&quot;percentage_of_original_size&quot;</span><span class="o">:</span> <span class="mf">30.303030303030305</span><span class="p">,</span>
<span class="s">&quot;wire&quot;</span><span class="o">:</span> <span class="s">&quot;01881f3468e5891afcbf83868a3d856659c62e3f&quot;</span><span class="p">,</span>
<span class="s">&quot;headers&quot;</span><span class="o">:</span> <span class="p">[</span>
<span class="p">{</span>
<span class="s">&quot;:authority&quot;</span><span class="o">:</span> <span class="s">&quot;example.org&quot;</span>
<span class="p">},</span>
<span class="p">{</span>
<span class="s">&quot;:method&quot;</span><span class="o">:</span> <span class="s">&quot;GET&quot;</span>
<span class="p">},</span>
<span class="p">{</span>
<span class="s">&quot;:path&quot;</span><span class="o">:</span> <span class="s">&quot;/&quot;</span>
<span class="p">},</span>
<span class="p">{</span>
<span class="s">&quot;:scheme&quot;</span><span class="o">:</span> <span class="s">&quot;https&quot;</span>
<span class="p">},</span>
<span class="p">{</span>
<span class="s">&quot;user-agent&quot;</span><span class="o">:</span> <span class="s">&quot;nghttp2&quot;</span>
<span class="p">}</span>
<span class="p">],</span>
<span class="s">&quot;header_table_size&quot;</span><span class="o">:</span> <span class="mi">4096</span>
<span class="p">}</span>
<span class="p">,</span>
<span class="p">{</span>
<span class="s">&quot;seq&quot;</span><span class="o">:</span> <span class="mi">1</span><span class="p">,</span>
<span class="s">&quot;inputLen&quot;</span><span class="o">:</span> <span class="mi">74</span><span class="p">,</span>
<span class="s">&quot;outputLength&quot;</span><span class="o">:</span> <span class="mi">10</span><span class="p">,</span>
<span class="s">&quot;percentageOfOriginalSize&quot;</span><span class="o">:</span> <span class="mf">13.513513513513514</span><span class="p">,</span>
<span class="s">&quot;output&quot;</span><span class="o">:</span> <span class="s">&quot;87038504252dd5918386&quot;</span>
<span class="s">&quot;input_length&quot;</span><span class="o">:</span> <span class="mi">74</span><span class="p">,</span>
<span class="s">&quot;output_length&quot;</span><span class="o">:</span> <span class="mi">10</span><span class="p">,</span>
<span class="s">&quot;percentage_of_original_size&quot;</span><span class="o">:</span> <span class="mf">13.513513513513514</span><span class="p">,</span>
<span class="s">&quot;wire&quot;</span><span class="o">:</span> <span class="s">&quot;88448504252dd5918485&quot;</span><span class="p">,</span>
<span class="s">&quot;headers&quot;</span><span class="o">:</span> <span class="p">[</span>
<span class="p">{</span>
<span class="s">&quot;:authority&quot;</span><span class="o">:</span> <span class="s">&quot;example.org&quot;</span>
<span class="p">},</span>
<span class="p">{</span>
<span class="s">&quot;:method&quot;</span><span class="o">:</span> <span class="s">&quot;POST&quot;</span>
<span class="p">},</span>
<span class="p">{</span>
<span class="s">&quot;:path&quot;</span><span class="o">:</span> <span class="s">&quot;/account&quot;</span>
<span class="p">},</span>
<span class="p">{</span>
<span class="s">&quot;:scheme&quot;</span><span class="o">:</span> <span class="s">&quot;https&quot;</span>
<span class="p">},</span>
<span class="p">{</span>
<span class="s">&quot;user-agent&quot;</span><span class="o">:</span> <span class="s">&quot;nghttp2&quot;</span>
<span class="p">}</span>
<span class="p">],</span>
<span class="s">&quot;header_table_size&quot;</span><span class="o">:</span> <span class="mi">4096</span>
<span class="p">}</span>
<span class="p">]</span>
<span class="p">}</span>
</pre></div>
</div>
<p>The output can be used as the input for <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">headerTable</span></tt> key is added and its
<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
associated value contains the state of dyanmic header table after the
corresponding header set was processed. The value contains following
keys:</p>
@ -682,85 +733,119 @@ available. This will happen when the specifying smaller value in
<dt>size</dt>
<dd>The sum of the spaces entries occupied, this includes the
entry overhead.</dd>
<dt>maxSize</dt>
<dt>max_size</dt>
<dd>The maximum header table size.</dd>
<dt>deflateSize</dt>
<dd>The sum of the spaces entries occupied within <tt class="docutils literal"><span class="pre">maxDeflateSize</span></tt>.</dd>
<dt>maxDeflateSize</dt>
<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>
<dd>The maximum header table size encoder uses. This can be smaller
than <tt class="docutils literal"><span class="pre">maxSize</span></tt>. In this case, encoder only uses up to first
<tt class="docutils literal"><span class="pre">maxDeflateSize</span></tt> buffer. Since the header table size is still
<tt class="docutils literal"><span class="pre">maxSize</span></tt>, the encoder has to keep track of entries ouside the
<tt class="docutils literal"><span class="pre">maxDeflateSize</span></tt> but inside the <tt class="docutils literal"><span class="pre">maxSize</span></tt> and make sure that
they are no longer referenced.</dd>
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
<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>
</dl>
<p>Example:</p>
<div class="highlight-c"><div class="highlight"><pre><span class="p">[</span>
<div class="highlight-c"><div class="highlight"><pre><span class="p">{</span>
<span class="s">&quot;context&quot;</span><span class="o">:</span> <span class="s">&quot;request&quot;</span><span class="p">,</span>
<span class="s">&quot;cases&quot;</span><span class="o">:</span>
<span class="p">[</span>
<span class="p">{</span>
<span class="s">&quot;seq&quot;</span><span class="o">:</span> <span class="mi">0</span><span class="p">,</span>
<span class="s">&quot;inputLen&quot;</span><span class="o">:</span> <span class="mi">66</span><span class="p">,</span>
<span class="s">&quot;outputLength&quot;</span><span class="o">:</span> <span class="mi">20</span><span class="p">,</span>
<span class="s">&quot;percentageOfOriginalSize&quot;</span><span class="o">:</span> <span class="mf">30.303030303030305</span><span class="p">,</span>
<span class="s">&quot;output&quot;</span><span class="o">:</span> <span class="s">&quot;818703881f3468e5891afcbf863c856659c62e3f&quot;</span><span class="p">,</span>
<span class="s">&quot;headerTable&quot;</span><span class="o">:</span> <span class="p">{</span>
<span class="s">&quot;input_length&quot;</span><span class="o">:</span> <span class="mi">66</span><span class="p">,</span>
<span class="s">&quot;output_length&quot;</span><span class="o">:</span> <span class="mi">20</span><span class="p">,</span>
<span class="s">&quot;percentage_of_original_size&quot;</span><span class="o">:</span> <span class="mf">30.303030303030305</span><span class="p">,</span>
<span class="s">&quot;wire&quot;</span><span class="o">:</span> <span class="s">&quot;01881f3468e5891afcbf83868a3d856659c62e3f&quot;</span><span class="p">,</span>
<span class="s">&quot;headers&quot;</span><span class="o">:</span> <span class="p">[</span>
<span class="p">{</span>
<span class="s">&quot;:authority&quot;</span><span class="o">:</span> <span class="s">&quot;example.org&quot;</span>
<span class="p">},</span>
<span class="p">{</span>
<span class="s">&quot;:method&quot;</span><span class="o">:</span> <span class="s">&quot;GET&quot;</span>
<span class="p">},</span>
<span class="p">{</span>
<span class="s">&quot;:path&quot;</span><span class="o">:</span> <span class="s">&quot;/&quot;</span>
<span class="p">},</span>
<span class="p">{</span>
<span class="s">&quot;:scheme&quot;</span><span class="o">:</span> <span class="s">&quot;https&quot;</span>
<span class="p">},</span>
<span class="p">{</span>
<span class="s">&quot;user-agent&quot;</span><span class="o">:</span> <span class="s">&quot;nghttp2&quot;</span>
<span class="p">}</span>
<span class="p">],</span>
<span class="s">&quot;header_table_size&quot;</span><span class="o">:</span> <span class="mi">4096</span><span class="p">,</span>
<span class="s">&quot;header_table&quot;</span><span class="o">:</span> <span class="p">{</span>
<span class="s">&quot;entries&quot;</span><span class="o">:</span> <span class="p">[</span>
<span class="p">{</span>
<span class="s">&quot;index&quot;</span><span class="o">:</span> <span class="mi">0</span><span class="p">,</span>
<span class="s">&quot;index&quot;</span><span class="o">:</span> <span class="mi">1</span><span class="p">,</span>
<span class="s">&quot;name&quot;</span><span class="o">:</span> <span class="s">&quot;user-agent&quot;</span><span class="p">,</span>
<span class="s">&quot;value&quot;</span><span class="o">:</span> <span class="s">&quot;nghttp2&quot;</span><span class="p">,</span>
<span class="s">&quot;referenced&quot;</span><span class="o">:</span> <span class="nb">true</span><span class="p">,</span>
<span class="s">&quot;size&quot;</span><span class="o">:</span> <span class="mi">49</span>
<span class="p">},</span>
<span class="p">{</span>
<span class="s">&quot;index&quot;</span><span class="o">:</span> <span class="mi">1</span><span class="p">,</span>
<span class="s">&quot;name&quot;</span><span class="o">:</span> <span class="s">&quot;:path&quot;</span><span class="p">,</span>
<span class="s">&quot;value&quot;</span><span class="o">:</span> <span class="s">&quot;/&quot;</span><span class="p">,</span>
<span class="s">&quot;referenced&quot;</span><span class="o">:</span> <span class="nb">true</span><span class="p">,</span>
<span class="s">&quot;size&quot;</span><span class="o">:</span> <span class="mi">38</span>
<span class="p">},</span>
<span class="p">{</span>
<span class="s">&quot;index&quot;</span><span class="o">:</span> <span class="mi">2</span><span class="p">,</span>
<span class="s">&quot;name&quot;</span><span class="o">:</span> <span class="s">&quot;:authority&quot;</span><span class="p">,</span>
<span class="s">&quot;value&quot;</span><span class="o">:</span> <span class="s">&quot;example.org&quot;</span><span class="p">,</span>
<span class="s">&quot;referenced&quot;</span><span class="o">:</span> <span class="nb">true</span><span class="p">,</span>
<span class="s">&quot;size&quot;</span><span class="o">:</span> <span class="mi">53</span>
<span class="p">},</span>
<span class="p">{</span>
<span class="s">&quot;index&quot;</span><span class="o">:</span> <span class="mi">3</span><span class="p">,</span>
<span class="s">&quot;name&quot;</span><span class="o">:</span> <span class="s">&quot;:scheme&quot;</span><span class="p">,</span>
<span class="s">&quot;value&quot;</span><span class="o">:</span> <span class="s">&quot;https&quot;</span><span class="p">,</span>
<span class="s">&quot;referenced&quot;</span><span class="o">:</span> <span class="nb">true</span><span class="p">,</span>
<span class="s">&quot;size&quot;</span><span class="o">:</span> <span class="mi">44</span>
<span class="p">},</span>
<span class="p">{</span>
<span class="s">&quot;index&quot;</span><span class="o">:</span> <span class="mi">3</span><span class="p">,</span>
<span class="s">&quot;name&quot;</span><span class="o">:</span> <span class="s">&quot;:path&quot;</span><span class="p">,</span>
<span class="s">&quot;value&quot;</span><span class="o">:</span> <span class="s">&quot;/&quot;</span><span class="p">,</span>
<span class="s">&quot;referenced&quot;</span><span class="o">:</span> <span class="nb">true</span><span class="p">,</span>
<span class="s">&quot;size&quot;</span><span class="o">:</span> <span class="mi">38</span>
<span class="p">},</span>
<span class="p">{</span>
<span class="s">&quot;index&quot;</span><span class="o">:</span> <span class="mi">4</span><span class="p">,</span>
<span class="s">&quot;name&quot;</span><span class="o">:</span> <span class="s">&quot;:method&quot;</span><span class="p">,</span>
<span class="s">&quot;value&quot;</span><span class="o">:</span> <span class="s">&quot;GET&quot;</span><span class="p">,</span>
<span class="s">&quot;referenced&quot;</span><span class="o">:</span> <span class="nb">true</span><span class="p">,</span>
<span class="s">&quot;size&quot;</span><span class="o">:</span> <span class="mi">42</span>
<span class="p">},</span>
<span class="p">{</span>
<span class="s">&quot;index&quot;</span><span class="o">:</span> <span class="mi">5</span><span class="p">,</span>
<span class="s">&quot;name&quot;</span><span class="o">:</span> <span class="s">&quot;:authority&quot;</span><span class="p">,</span>
<span class="s">&quot;value&quot;</span><span class="o">:</span> <span class="s">&quot;example.org&quot;</span><span class="p">,</span>
<span class="s">&quot;referenced&quot;</span><span class="o">:</span> <span class="nb">true</span><span class="p">,</span>
<span class="s">&quot;size&quot;</span><span class="o">:</span> <span class="mi">53</span>
<span class="p">}</span>
<span class="p">],</span>
<span class="s">&quot;size&quot;</span><span class="o">:</span> <span class="mi">226</span><span class="p">,</span>
<span class="s">&quot;maxSize&quot;</span><span class="o">:</span> <span class="mi">4096</span><span class="p">,</span>
<span class="s">&quot;deflateSize&quot;</span><span class="o">:</span> <span class="mi">226</span><span class="p">,</span>
<span class="s">&quot;maxDeflateSize&quot;</span><span class="o">:</span> <span class="mi">4096</span>
<span class="s">&quot;max_size&quot;</span><span class="o">:</span> <span class="mi">4096</span><span class="p">,</span>
<span class="s">&quot;deflate_size&quot;</span><span class="o">:</span> <span class="mi">226</span><span class="p">,</span>
<span class="s">&quot;max_deflate_size&quot;</span><span class="o">:</span> <span class="mi">4096</span>
<span class="p">}</span>
<span class="p">},</span>
<span class="p">}</span>
<span class="p">,</span>
<span class="p">{</span>
<span class="s">&quot;seq&quot;</span><span class="o">:</span> <span class="mi">1</span><span class="p">,</span>
<span class="s">&quot;inputLen&quot;</span><span class="o">:</span> <span class="mi">74</span><span class="p">,</span>
<span class="s">&quot;outputLength&quot;</span><span class="o">:</span> <span class="mi">10</span><span class="p">,</span>
<span class="s">&quot;percentageOfOriginalSize&quot;</span><span class="o">:</span> <span class="mf">13.513513513513514</span><span class="p">,</span>
<span class="s">&quot;output&quot;</span><span class="o">:</span> <span class="s">&quot;87038504252dd5918386&quot;</span><span class="p">,</span>
<span class="s">&quot;headerTable&quot;</span><span class="o">:</span> <span class="p">{</span>
<span class="s">&quot;entries&quot;</span><span class="o">:</span> <span class="p">[</span>
<span class="s">&quot;input_length&quot;</span><span class="o">:</span> <span class="mi">74</span><span class="p">,</span>
<span class="s">&quot;output_length&quot;</span><span class="o">:</span> <span class="mi">10</span><span class="p">,</span>
<span class="s">&quot;percentage_of_original_size&quot;</span><span class="o">:</span> <span class="mf">13.513513513513514</span><span class="p">,</span>
<span class="s">&quot;wire&quot;</span><span class="o">:</span> <span class="s">&quot;88448504252dd5918485&quot;</span><span class="p">,</span>
<span class="s">&quot;headers&quot;</span><span class="o">:</span> <span class="p">[</span>
<span class="p">{</span>
<span class="s">&quot;index&quot;</span><span class="o">:</span> <span class="mi">0</span><span class="p">,</span>
<span class="s">&quot;name&quot;</span><span class="o">:</span> <span class="s">&quot;:path&quot;</span><span class="p">,</span>
<span class="s">&quot;value&quot;</span><span class="o">:</span> <span class="s">&quot;/account&quot;</span><span class="p">,</span>
<span class="s">&quot;referenced&quot;</span><span class="o">:</span> <span class="nb">true</span><span class="p">,</span>
<span class="s">&quot;size&quot;</span><span class="o">:</span> <span class="mi">45</span>
<span class="s">&quot;:authority&quot;</span><span class="o">:</span> <span class="s">&quot;example.org&quot;</span>
<span class="p">},</span>
<span class="p">{</span>
<span class="s">&quot;:method&quot;</span><span class="o">:</span> <span class="s">&quot;POST&quot;</span>
<span class="p">},</span>
<span class="p">{</span>
<span class="s">&quot;:path&quot;</span><span class="o">:</span> <span class="s">&quot;/account&quot;</span>
<span class="p">},</span>
<span class="p">{</span>
<span class="s">&quot;:scheme&quot;</span><span class="o">:</span> <span class="s">&quot;https&quot;</span>
<span class="p">},</span>
<span class="p">{</span>
<span class="s">&quot;user-agent&quot;</span><span class="o">:</span> <span class="s">&quot;nghttp2&quot;</span>
<span class="p">}</span>
<span class="p">],</span>
<span class="s">&quot;header_table_size&quot;</span><span class="o">:</span> <span class="mi">4096</span><span class="p">,</span>
<span class="s">&quot;header_table&quot;</span><span class="o">:</span> <span class="p">{</span>
<span class="s">&quot;entries&quot;</span><span class="o">:</span> <span class="p">[</span>
<span class="p">{</span>
<span class="s">&quot;index&quot;</span><span class="o">:</span> <span class="mi">1</span><span class="p">,</span>
<span class="s">&quot;name&quot;</span><span class="o">:</span> <span class="s">&quot;:method&quot;</span><span class="p">,</span>
@ -777,97 +862,139 @@ they are no longer referenced.</dd>
<span class="p">},</span>
<span class="p">{</span>
<span class="s">&quot;index&quot;</span><span class="o">:</span> <span class="mi">3</span><span class="p">,</span>
<span class="s">&quot;name&quot;</span><span class="o">:</span> <span class="s">&quot;:path&quot;</span><span class="p">,</span>
<span class="s">&quot;value&quot;</span><span class="o">:</span> <span class="s">&quot;/&quot;</span><span class="p">,</span>
<span class="s">&quot;referenced&quot;</span><span class="o">:</span> <span class="nb">false</span><span class="p">,</span>
<span class="s">&quot;size&quot;</span><span class="o">:</span> <span class="mi">38</span>
<span class="p">},</span>
<span class="p">{</span>
<span class="s">&quot;index&quot;</span><span class="o">:</span> <span class="mi">4</span><span class="p">,</span>
<span class="s">&quot;name&quot;</span><span class="o">:</span> <span class="s">&quot;:authority&quot;</span><span class="p">,</span>
<span class="s">&quot;value&quot;</span><span class="o">:</span> <span class="s">&quot;example.org&quot;</span><span class="p">,</span>
<span class="s">&quot;referenced&quot;</span><span class="o">:</span> <span class="nb">true</span><span class="p">,</span>
<span class="s">&quot;size&quot;</span><span class="o">:</span> <span class="mi">53</span>
<span class="p">},</span>
<span class="p">{</span>
<span class="s">&quot;index&quot;</span><span class="o">:</span> <span class="mi">5</span><span class="p">,</span>
<span class="s">&quot;name&quot;</span><span class="o">:</span> <span class="s">&quot;:scheme&quot;</span><span class="p">,</span>
<span class="s">&quot;value&quot;</span><span class="o">:</span> <span class="s">&quot;https&quot;</span><span class="p">,</span>
<span class="s">&quot;referenced&quot;</span><span class="o">:</span> <span class="nb">true</span><span class="p">,</span>
<span class="s">&quot;size&quot;</span><span class="o">:</span> <span class="mi">44</span>
<span class="p">},</span>
<span class="p">{</span>
<span class="s">&quot;index&quot;</span><span class="o">:</span> <span class="mi">6</span><span class="p">,</span>
<span class="s">&quot;index&quot;</span><span class="o">:</span> <span class="mi">4</span><span class="p">,</span>
<span class="s">&quot;name&quot;</span><span class="o">:</span> <span class="s">&quot;:path&quot;</span><span class="p">,</span>
<span class="s">&quot;value&quot;</span><span class="o">:</span> <span class="s">&quot;/&quot;</span><span class="p">,</span>
<span class="s">&quot;referenced&quot;</span><span class="o">:</span> <span class="nb">false</span><span class="p">,</span>
<span class="s">&quot;size&quot;</span><span class="o">:</span> <span class="mi">38</span>
<span class="p">},</span>
<span class="p">{</span>
<span class="s">&quot;index&quot;</span><span class="o">:</span> <span class="mi">5</span><span class="p">,</span>
<span class="s">&quot;name&quot;</span><span class="o">:</span> <span class="s">&quot;:method&quot;</span><span class="p">,</span>
<span class="s">&quot;value&quot;</span><span class="o">:</span> <span class="s">&quot;GET&quot;</span><span class="p">,</span>
<span class="s">&quot;referenced&quot;</span><span class="o">:</span> <span class="nb">false</span><span class="p">,</span>
<span class="s">&quot;size&quot;</span><span class="o">:</span> <span class="mi">42</span>
<span class="p">},</span>
<span class="p">{</span>
<span class="s">&quot;index&quot;</span><span class="o">:</span> <span class="mi">6</span><span class="p">,</span>
<span class="s">&quot;name&quot;</span><span class="o">:</span> <span class="s">&quot;:authority&quot;</span><span class="p">,</span>
<span class="s">&quot;value&quot;</span><span class="o">:</span> <span class="s">&quot;example.org&quot;</span><span class="p">,</span>
<span class="s">&quot;referenced&quot;</span><span class="o">:</span> <span class="nb">true</span><span class="p">,</span>
<span class="s">&quot;size&quot;</span><span class="o">:</span> <span class="mi">53</span>
<span class="p">}</span>
<span class="p">],</span>
<span class="s">&quot;size&quot;</span><span class="o">:</span> <span class="mi">314</span><span class="p">,</span>
<span class="s">&quot;maxSize&quot;</span><span class="o">:</span> <span class="mi">4096</span><span class="p">,</span>
<span class="s">&quot;deflateSize&quot;</span><span class="o">:</span> <span class="mi">314</span><span class="p">,</span>
<span class="s">&quot;maxDeflateSize&quot;</span><span class="o">:</span> <span class="mi">4096</span>
<span class="s">&quot;size&quot;</span><span class="o">:</span> <span class="mi">269</span><span class="p">,</span>
<span class="s">&quot;max_size&quot;</span><span class="o">:</span> <span class="mi">4096</span><span class="p">,</span>
<span class="s">&quot;deflate_size&quot;</span><span class="o">:</span> <span class="mi">269</span><span class="p">,</span>
<span class="s">&quot;max_deflate_size&quot;</span><span class="o">:</span> <span class="mi">4096</span>
<span class="p">}</span>
<span class="p">}</span>
<span class="p">]</span>
<span class="p">}</span>
</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>
<p>The <tt class="docutils literal"><span class="pre">inflatehd</span></tt> reads JSON array from stdin and outputs decompressed
name/value pairs in JSON array. The element of input array must be a
JSON object. Each object must have at least following key:</p>
<dl class="docutils">
<dt>output</dt>
<dd>compressed header block in hex string.</dd>
</dl>
<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>
<p>The root JSON object must contain <tt class="docutils literal"><span class="pre">context</span></tt> key, which indicates
which compression context is used. If it is <tt class="docutils literal"><span class="pre">request</span></tt>, request
compression context is used. Otherwise, response compression context
is used. The value of <tt class="docutils literal"><span class="pre">cases</span></tt> key contains the sequence of
compressed header block. They share the same compression context and
are processed in the order they appear. Each item in the sequence is a
JSON object and it must have at least <tt class="docutils literal"><span class="pre">wire</span></tt> key. Its value is a
string containing compressed header block in hex string.</p>
<p>Example:</p>
<div class="highlight-c"><div class="highlight"><pre><span class="p">[</span>
<span class="p">{</span> <span class="s">&quot;output&quot;</span><span class="o">:</span> <span class="s">&quot;0284f77778ff&quot;</span> <span class="p">},</span>
<span class="p">{</span> <span class="s">&quot;output&quot;</span><span class="o">:</span> <span class="s">&quot;0185fafd3c3c7f81&quot;</span> <span class="p">}</span>
<div class="highlight-c"><div class="highlight"><pre><span class="p">{</span>
<span class="s">&quot;context&quot;</span><span class="o">:</span> <span class="s">&quot;request&quot;</span><span class="p">,</span>
<span class="s">&quot;cases&quot;</span><span class="o">:</span>
<span class="p">[</span>
<span class="p">{</span> <span class="s">&quot;wire&quot;</span><span class="o">:</span> <span class="s">&quot;8285&quot;</span> <span class="p">},</span>
<span class="p">{</span> <span class="s">&quot;wire&quot;</span><span class="o">:</span> <span class="s">&quot;8583&quot;</span> <span class="p">}</span>
<span class="p">]</span>
<span class="p">}</span>
</pre></div>
</div>
<p>The output is a JSON array and each element is JSON object, which has
at least following keys:</p>
<p>The output is JSON object. It contains <tt class="docutils literal"><span class="pre">context</span></tt> key and its value
is <tt class="docutils literal"><span class="pre">request</span></tt> if the compression context is request, otherwise
<tt class="docutils literal"><span class="pre">response</span></tt>. The root JSON object also contains <tt class="docutils literal"><span class="pre">cases</span></tt> key and its
value is an array of JSON object, which has at least following keys:</p>
<dl class="docutils">
<dt>seq</dt>
<dd>The index of header set in the input.</dd>
<dt>headers</dt>
<dd>The JSON array contains decompressed name/value pairs. Each
element is JSON aray having 2 elements. The index 0 of the array
contains the header field name. The index 1 contains the header
field value.</dd>
<dd>The JSON array contains decompressed name/value pairs.</dd>
<dt>wire</dt>
<dd>The compressed header block in hex string.</dd>
<dt>header_table_size</dt>
<dd>The header table size adjsuted before inflating compressed header
block.</dd>
</dl>
<p>Example:</p>
<div class="highlight-c"><div class="highlight"><pre><span class="p">[</span>
<div class="highlight-c"><div class="highlight"><pre><span class="p">{</span>
<span class="s">&quot;context&quot;</span><span class="o">:</span> <span class="s">&quot;request&quot;</span><span class="p">,</span>
<span class="s">&quot;cases&quot;</span><span class="o">:</span>
<span class="p">[</span>
<span class="p">{</span>
<span class="s">&quot;seq&quot;</span><span class="o">:</span> <span class="mi">0</span><span class="p">,</span>
<span class="s">&quot;wire&quot;</span><span class="o">:</span> <span class="s">&quot;01881f3468e5891afcbf83868a3d856659c62e3f&quot;</span><span class="p">,</span>
<span class="s">&quot;headers&quot;</span><span class="o">:</span> <span class="p">[</span>
<span class="p">[</span><span class="s">&quot;:authority&quot;</span><span class="p">,</span> <span class="s">&quot;example.org&quot;</span><span class="p">],</span>
<span class="p">[</span><span class="s">&quot;:method&quot;</span><span class="p">,</span> <span class="s">&quot;GET&quot;</span><span class="p">],</span>
<span class="p">[</span><span class="s">&quot;:path&quot;</span><span class="p">,</span> <span class="s">&quot;/&quot;</span><span class="p">],</span>
<span class="p">[</span><span class="s">&quot;:scheme&quot;</span><span class="p">,</span> <span class="s">&quot;https&quot;</span><span class="p">],</span>
<span class="p">[</span><span class="s">&quot;user-agent&quot;</span><span class="p">,</span> <span class="s">&quot;nghttp2&quot;</span><span class="p">]</span>
<span class="p">]</span>
<span class="p">{</span>
<span class="s">&quot;:authority&quot;</span><span class="o">:</span> <span class="s">&quot;example.org&quot;</span>
<span class="p">},</span>
<span class="p">{</span>
<span class="s">&quot;:method&quot;</span><span class="o">:</span> <span class="s">&quot;GET&quot;</span>
<span class="p">},</span>
<span class="p">{</span>
<span class="s">&quot;:path&quot;</span><span class="o">:</span> <span class="s">&quot;/&quot;</span>
<span class="p">},</span>
<span class="p">{</span>
<span class="s">&quot;:scheme&quot;</span><span class="o">:</span> <span class="s">&quot;https&quot;</span>
<span class="p">},</span>
<span class="p">{</span>
<span class="s">&quot;user-agent&quot;</span><span class="o">:</span> <span class="s">&quot;nghttp2&quot;</span>
<span class="p">}</span>
<span class="p">],</span>
<span class="s">&quot;header_table_size&quot;</span><span class="o">:</span> <span class="mi">4096</span>
<span class="p">}</span>
<span class="p">,</span>
<span class="p">{</span>
<span class="s">&quot;seq&quot;</span><span class="o">:</span> <span class="mi">1</span><span class="p">,</span>
<span class="s">&quot;wire&quot;</span><span class="o">:</span> <span class="s">&quot;88448504252dd5918485&quot;</span><span class="p">,</span>
<span class="s">&quot;headers&quot;</span><span class="o">:</span> <span class="p">[</span>
<span class="p">[</span><span class="s">&quot;:authority&quot;</span><span class="p">,</span> <span class="s">&quot;example.org&quot;</span><span class="p">],</span>
<span class="p">[</span><span class="s">&quot;:method&quot;</span><span class="p">,</span> <span class="s">&quot;POST&quot;</span><span class="p">],</span>
<span class="p">[</span><span class="s">&quot;:path&quot;</span><span class="p">,</span> <span class="s">&quot;/account&quot;</span><span class="p">],</span>
<span class="p">[</span><span class="s">&quot;:scheme&quot;</span><span class="p">,</span> <span class="s">&quot;https&quot;</span><span class="p">],</span>
<span class="p">[</span><span class="s">&quot;user-agent&quot;</span><span class="p">,</span> <span class="s">&quot;nghttp2&quot;</span><span class="p">]</span>
<span class="p">]</span>
<span class="p">{</span>
<span class="s">&quot;:method&quot;</span><span class="o">:</span> <span class="s">&quot;POST&quot;</span>
<span class="p">},</span>
<span class="p">{</span>
<span class="s">&quot;:path&quot;</span><span class="o">:</span> <span class="s">&quot;/account&quot;</span>
<span class="p">},</span>
<span class="p">{</span>
<span class="s">&quot;user-agent&quot;</span><span class="o">:</span> <span class="s">&quot;nghttp2&quot;</span>
<span class="p">},</span>
<span class="p">{</span>
<span class="s">&quot;:scheme&quot;</span><span class="o">:</span> <span class="s">&quot;https&quot;</span>
<span class="p">},</span>
<span class="p">{</span>
<span class="s">&quot;:authority&quot;</span><span class="o">:</span> <span class="s">&quot;example.org&quot;</span>
<span class="p">}</span>
<span class="p">],</span>
<span class="s">&quot;header_table_size&quot;</span><span class="o">:</span> <span class="mi">4096</span>
<span class="p">}</span>
<span class="p">]</span>
<span class="p">}</span>
</pre></div>
</div>
<p>The output can be used as the input for <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">headerTable</span></tt> key is added and its
<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
associated value contains the state of dyanmic header table after the
corresponding header set was processed. The format is the same as
<tt class="docutils literal"><span class="pre">deflatehd</span></tt>.</p>

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