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<title>Errordoc Directives - Configure - H2O - the optimized HTTP/2 server</title>
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<a href="configure.html">Configure</a> >
Errordoc Directives
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<p>
This document describes the configuration directives of the errordoc handler.
</p>
<div id="error-doc" class="directive-head">
<h3><a href="configure/errordoc_directives.html#error-doc"><code>"error-doc"</code></a></h3>
</div>
<dl class="directive-desc">
<dt>Description:</dt>
<dd>
<p>
Specifies the content to be sent when returning an error response (i.e. a response with 4xx or 5xx status code).
</p>
<p>
The argument must be a mapping containing following attributes, or if it is a sequence, every element must be a mapping with the following attributes.
<ul>
<li><code>status</code> - three-digit number indicating the status code (or sequence of that from version 2.3)
<li><code>url</code> - URL of the document to be served
</ul>
</p>
<p>
URL can either be absolute or relative.
Only <code>content-type</code>, <code>content-language</code>, <code>set-cookie</code> headers obtained from the specified URL are served to the client.
</p>
<p>
<div class="example">
<div class="caption">Example. Set error document for 404 status</div>
<pre><code>error-doc:
status: 404
url: /404.html
</code></pre>
</div>
<div class="example">
<div class="caption">Example. Set error document for 500 and 503 status</div>
<pre><code>error-doc:
- status: 500
url: /internal-error.html
- status: 503
url: /service-unavailable.html
</code></pre>
</div>
<div class="example">
<div class="caption">Example. Set error document for 50x statuses (From version 2.3)</div>
<pre><code>error-doc:
status: [500, 502, 503, 504]
url: /50x.html
</code></pre>
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</dd>
<dt><a href="configure/syntax_and_structure.html#config_levels">Level</a>:</dt>
<dd>global, host, path, extension</dd>
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