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+<title>Reproxy Directives - Configure - H2O - the optimized HTTP/2 server</title>
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+<h2>
+<a href="configure.html">Configure</a> &gt;
+Reproxy Directives
+</h2>
+
+
+<p>
+This document describes the configuration directives of the reproxy handler.
+</p>
+
+<div id="reproxy" class="directive-head">
+<h3><a href="configure/reproxy_directives.html#reproxy"><code>"reproxy"</code></a></h3>
+</div>
+
+<dl class="directive-desc">
+<dt>Description:</dt>
+<dd>
+<p>
+A boolean flag (<code>ON</code> or <code>OFF</code>) indicating if the server should recognize the <code>X-Reproxy-URL</code> header sent from <a href="configure/proxy_directives.html#proxy.reverse.url">upstream servers</a>.
+
+</p>
+
+<p>
+If H2O recognizes the header, it fetches the contents of the resource specified by the header, and sends the contents as the response to the client.
+If the status code associated with the <code>X-Reproxy-URL</code> header is 307 or 308, then the method of the original request is used to obtain the specified resource.
+Otherwise, the request method is changed to <code>GET</code>.
+</p>
+<p>
+For example, an upstream server may send an URL pointing to a large image using the <code>X-Reproxy-URL</code> header stored on a distributed file system, and let H2O fetch and return the content to the client, instead of fetching the image by itself.
+Doing so would reduce the load on the application server.
+</p>
+
+</dd>
+<dt><a href="configure/syntax_and_structure.html#config_levels">Level</a>:</dt>
+<dd>global, host, path, extension</dd>
+<dt>Default:</dt>
+<dd><code><pre>reproxy: OFF</pre></code>
+</dl>
+
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