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@ -190,9 +190,10 @@ example, you can send GET request to the server using nghttp:</p>
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<h2>HTTP/2 proxy mode<a class="headerlink" href="#http-2-proxy-mode" title="Permalink to this headline">¶</a></h2>
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<p>If nghttpx is invoked with <tt class="docutils literal"><span class="pre">-s</span></tt> option, it operates in HTTP/2 proxy
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mode. The supported protocols in frontend and backend connections are
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the same in <a class="reference internal" href="#default-mode">default mode</a>. The difference is that this mode acts like
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forward proxy and assumes the backend is HTTP/1 proxy server (e.g.,
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squid). So HTTP/1 request must include absolute URI in request line.</p>
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the same in <a class="reference internal" href="#default-mode">default mode</a>. The difference is that this mode acts
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like forward proxy and assumes the backend is HTTP/1 proxy server
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(e.g., squid, traffic server). So HTTP/1 request must include
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absolute URI in request line.</p>
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<p>By default, frontend connection is encrypted, this mode is also called
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secure proxy. If nghttpx is linked with spdylay, it supports SPDY
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protocols and it works as so called SPDY proxy.</p>
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@ -205,29 +206,45 @@ work for each request, for example, dispatching requests to the origin
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server and caching contents.</p>
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<p>For example, to make nghttpx listen to encrypted HTTP/2 requests at
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port 8443, and a backend HTTP/1 proxy server is configured to listen
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to HTTP/1 request at port 3128 in the same host, run nghttpx
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to HTTP/1 request at port 8080 in the same host, run nghttpx
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command-line like this:</p>
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<div class="highlight-c"><div class="highlight"><pre>$ nghttpx -s -f0.0.0.0,8443 -b127.0.0.1,3128 /path/to/server.key /path/to/server.crt
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<div class="highlight-c"><div class="highlight"><pre>$ nghttpx -s -f'*,8443' -b127.0.0.1,8080 /path/to/server.key /path/to/server.crt
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</pre></div>
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</div>
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<p>At the time of this writing, there is no known HTTP/2 client which
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supports HTTP/2 proxy in this fashion. You can use Google Chrome to
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use this as secure (SPDY) proxy to test it out, though it does not use
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HTTP/2 at all.</p>
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<p>The one way to configure Google Chrome to use secure proxy is create
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proxy.pac script like this:</p>
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<p>At the time of this writing, Firefox nightly supports HTTP/2 proxy.
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Chromium can use nghttpx as secure (SPDY) proxy and will support
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HTTP/2 proxy in the near future.</p>
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<p>To make Firefox nightly or Chromium use nghttpx as HTTP/2 or SPDY
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proxy, user has to create proxy.pac script file 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>
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<span class="k">return</span> <span class="s2">"HTTPS SERVERADDR:PORT"</span><span class="p">;</span>
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<span class="p">}</span>
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</pre></div>
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</div>
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<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
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machine nghttpx is running. Please note that Google Chrome requires
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valid certificate for secure proxy.</p>
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<p>Then run Google Chrome with the following arguments:</p>
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machine nghttpx is running. Please note that both Firefox nightly and
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Chromium requires valid certificate for secure proxy.</p>
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<p>For Firefox nightly, open Preference window and select Advanced then
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click Network tab. Clicking Connection Settings button will show the
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dialog. Select “Automatic proxy configuration URL” and enter the path
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to proxy.pac file, something like this:</p>
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<div class="highlight-c"><div class="highlight"><pre><span class="nl">file:</span><span class="c1">///path/to/proxy.pac</span>
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</pre></div>
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</div>
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<p>For Chromium, use following command-line:</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
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</pre></div>
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</div>
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<p>Squid may work as out-of-box. Traffic server requires to be
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configured as forward proxy. Here is the minimum configuration items
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to edit:</p>
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<div class="highlight-c"><div class="highlight"><pre><span class="n">CONFIG</span> <span class="n">proxy</span><span class="p">.</span><span class="n">config</span><span class="p">.</span><span class="n">reverse_proxy</span><span class="p">.</span><span class="n">enabled</span> <span class="n">INT</span> <span class="mi">0</span>
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<span class="n">CONFIG</span> <span class="n">proxy</span><span class="p">.</span><span class="n">config</span><span class="p">.</span><span class="n">url_remap</span><span class="p">.</span><span class="n">remap_required</span> <span class="n">INT</span> <span class="mi">0</span>
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</pre></div>
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</div>
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<p>Consult Traffic server <a class="reference external" href="https://docs.trafficserver.apache.org/en/latest/admin/forward-proxy.en.html">documentation</a>
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to know how to configure traffic server as forward proxy and its
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security implications.</p>
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</div>
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<div class="section" id="client-mode">
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<h2>Client mode<a class="headerlink" href="#client-mode" title="Permalink to this headline">¶</a></h2>
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@ -184,18 +184,17 @@ header compression
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<tr class="row-even"><td>Large header (CONTINUATION)</td>
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<td>Yes</td>
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</tr>
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<tr class="row-odd"><td>BLOCKED extension</td>
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<tr class="row-odd"><td>ALTSVC extension</td>
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<td>Yes *1</td>
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</tr>
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<tr class="row-even"><td>ALTSVC extension</td>
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<td>Yes *2</td>
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</tr>
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</tbody>
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</table>
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<ul class="simple">
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<li>*1 As described in draft-12.</li>
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<li>*2 As described in draft-12, but reserved byte was removed.</li>
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<li>*1 As described in draft-12, but reserved byte was removed. ALTSVC
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may be removed from nghttp2 public API since it is not stabilized
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yet.</li>
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</ul>
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<p>BLOCKED frame, which once existed in h2-12, was removed in h2-13.</p>
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</div>
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<div class="section" id="public-test-server">
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<h2>Public Test Server<a class="headerlink" href="#public-test-server" title="Permalink to this headline">¶</a></h2>
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@ -597,7 +596,7 @@ sample configuration file <tt class="docutils literal"><span class="pre">nghttpx
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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
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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>
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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>
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</div>
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<p>The <tt class="docutils literal"><span class="pre">Client</span></tt> in the above is needs to be configured to use
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