1<?xml version="1.0" encoding="ISO-8859-1"?> 2<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"> 3<html xmlns="http://www.w3.org/1999/xhtml" lang="en" xml:lang="en"><head><!-- 4 XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX 5 This file is generated from xml source: DO NOT EDIT 6 XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX 7 --> 8<title>mod_dav - Apache HTTP Server</title> 9<link href="/style/css/manual.css" rel="stylesheet" media="all" type="text/css" title="Main stylesheet" /> 10<link href="/style/css/manual-loose-100pc.css" rel="alternate stylesheet" media="all" type="text/css" title="No Sidebar - Default font size" /> 11<link href="/style/css/manual-print.css" rel="stylesheet" media="print" type="text/css" /><link rel="stylesheet" type="text/css" href="/style/css/prettify.css" /> 12<script src="/style/scripts/prettify.min.js" type="text/javascript"> 13</script> 14 15<link href="/images/favicon.ico" rel="shortcut icon" /></head> 16<body> 17<div id="page-header"> 18<p class="menu"><a href="/mod/">Modules</a> | <a href="/mod/directives.html">Directives</a> | <a href="http://wiki.apache.org/httpd/FAQ">FAQ</a> | <a href="/glossary.html">Glossary</a> | <a href="/sitemap.html">Sitemap</a></p> 19<p class="apache">Apache HTTP Server Version 2.4</p> 20<img alt="" src="/images/feather.gif" /></div> 21<div class="up"><a href="./"><img title="<-" alt="<-" src="/images/left.gif" /></a></div> 22<div id="path"> 23<a href="http://www.apache.org/">Apache</a> > <a href="http://httpd.apache.org/">HTTP Server</a> > <a href="http://httpd.apache.org/docs/">Documentation</a> > <a href="../">Version 2.4</a> > <a href="./">Modules</a></div> 24<div id="page-content"> 25<div id="preamble"><h1>Apache Module mod_dav</h1> 26<div class="toplang"> 27<p><span>Available Languages: </span><a href="/en/mod/mod_dav.html" title="English"> en </a> | 28<a href="/fr/mod/mod_dav.html" hreflang="fr" rel="alternate" title="Fran�ais"> fr </a> | 29<a href="/ja/mod/mod_dav.html" hreflang="ja" rel="alternate" title="Japanese"> ja </a> | 30<a href="/ko/mod/mod_dav.html" hreflang="ko" rel="alternate" title="Korean"> ko </a></p> 31</div> 32<table class="module"><tr><th><a href="module-dict.html#Description">Description:</a></th><td>Distributed Authoring and Versioning 33(<a href="http://www.webdav.org/">WebDAV</a>) functionality</td></tr> 34<tr><th><a href="module-dict.html#Status">Status:</a></th><td>Extension</td></tr> 35<tr><th><a href="module-dict.html#ModuleIdentifier">Module�Identifier:</a></th><td>dav_module</td></tr> 36<tr><th><a href="module-dict.html#SourceFile">Source�File:</a></th><td>mod_dav.c</td></tr></table> 37<h3>Summary</h3> 38 39 <p>This module provides class 1 and class 2 <a href="http://www.webdav.org">WebDAV</a> ('Web-based Distributed 40 Authoring and Versioning') functionality for Apache. This 41 extension to the HTTP protocol allows creating, moving, 42 copying, and deleting resources and collections on a remote web 43 server.</p> 44</div> 45<div id="quickview"><h3 class="directives">Directives</h3> 46<ul id="toc"> 47<li><img alt="" src="/images/down.gif" /> <a href="#dav">Dav</a></li> 48<li><img alt="" src="/images/down.gif" /> <a href="#davdepthinfinity">DavDepthInfinity</a></li> 49<li><img alt="" src="/images/down.gif" /> <a href="#davmintimeout">DavMinTimeout</a></li> 50</ul> 51<h3>Topics</h3> 52<ul id="topics"> 53<li><img alt="" src="/images/down.gif" /> <a href="#example">Enabling WebDAV</a></li> 54<li><img alt="" src="/images/down.gif" /> <a href="#security">Security Issues</a></li> 55<li><img alt="" src="/images/down.gif" /> <a href="#complex">Complex Configurations</a></li> 56</ul><h3>See also</h3> 57<ul class="seealso"> 58<li><code class="directive"><a href="/mod/mod_dav_fs.html#davlockdb">DavLockDB</a></code></li> 59<li><code class="directive"><a href="/mod/core.html#limitxmlrequestbody">LimitXMLRequestBody</a></code></li> 60<li><a href="http://www.webdav.org">WebDAV Resources</a></li> 61</ul><ul class="seealso"><li><a href="#comments_section">Comments</a></li></ul></div> 62<div class="top"><a href="#page-header"><img alt="top" src="/images/up.gif" /></a></div> 63<div class="section"> 64<h2><a name="example" id="example">Enabling WebDAV</a></h2> 65 <p>To enable <code class="module"><a href="/mod/mod_dav.html">mod_dav</a></code>, add the following to a 66 container in your <code>httpd.conf</code> file:</p> 67 68 <pre class="prettyprint lang-config">Dav On</pre> 69 70 71 <p>This enables the DAV file system provider, which is implemented 72 by the <code class="module"><a href="/mod/mod_dav_fs.html">mod_dav_fs</a></code> module. Therefore, that module 73 must be compiled into the server or loaded at runtime using the 74 <code class="directive"><a href="/mod/mod_so.html#loadmodule">LoadModule</a></code> directive.</p> 75 76 <p>In addition, a location for the DAV lock database must be 77 specified in the global section of your <code>httpd.conf</code> 78 file using the <code class="directive"><a href="/mod/mod_dav_fs.html#davlockdb">DavLockDB</a></code> 79 directive:</p> 80 81 <pre class="prettyprint lang-config">DavLockDB /usr/local/apache2/var/DavLock</pre> 82 83 84 <p>The directory containing the lock database file must be 85 writable by the <code class="directive"><a href="/mod/mod_unixd.html#user">User</a></code> 86 and <code class="directive"><a href="/mod/mod_unixd.html#group">Group</a></code> under which 87 Apache is running.</p> 88 89 <p>You may wish to add a <code class="directive"><a href="/mod/core.html#limit"><Limit></a></code> clause inside the <code class="directive"><a href="/mod/core.html#location"><Location></a></code> directive to limit access to 90 DAV-enabled locations. If you want to set the maximum amount of 91 bytes that a DAV client can send at one request, you have to use 92 the <code class="directive"><a href="/mod/core.html#limitxmlrequestbody">LimitXMLRequestBody</a></code> 93 directive. The "normal" <code class="directive"><a href="/mod/core.html#limitrequestbody">LimitRequestBody</a></code> directive has no effect on DAV 94 requests.</p> 95 96 <div class="example"><h3>Full Example</h3><pre class="prettyprint lang-config">DavLockDB /usr/local/apache2/var/DavLock 97 98<Directory /usr/local/apache2/htdocs/foo> 99 Require all granted 100 Dav On 101 102 AuthType Basic 103 AuthName DAV 104 AuthUserFile user.passwd 105 106 <LimitExcept GET POST OPTIONS> 107 Require user admin 108 </LimitExcept> 109</Directory></pre> 110</div> 111 112</div><div class="top"><a href="#page-header"><img alt="top" src="/images/up.gif" /></a></div> 113<div class="section"> 114<h2><a name="security" id="security">Security Issues</a></h2> 115 116 <p>Since DAV access methods allow remote clients to manipulate 117 files on the server, you must take particular care to assure that 118 your server is secure before enabling <code class="module"><a href="/mod/mod_dav.html">mod_dav</a></code>.</p> 119 120 <p>Any location on the server where DAV is enabled should be 121 protected by authentication. The use of HTTP Basic Authentication 122 is not recommended. You should use at least HTTP Digest 123 Authentication, which is provided by the 124 <code class="module"><a href="/mod/mod_auth_digest.html">mod_auth_digest</a></code> module. Nearly all WebDAV clients 125 support this authentication method. An alternative is Basic 126 Authentication over an <a href="/ssl/">SSL</a> enabled 127 connection.</p> 128 129 <p>In order for <code class="module"><a href="/mod/mod_dav.html">mod_dav</a></code> to manage files, it must 130 be able to write to the directories and files under its control 131 using the <code class="directive"><a href="/mod/mod_unixd.html#user">User</a></code> and 132 <code class="directive"><a href="/mod/mod_unixd.html#group">Group</a></code> under which 133 Apache is running. New files created will also be owned by this 134 <code class="directive"><a href="/mod/mod_unixd.html#user">User</a></code> and <code class="directive"><a href="/mod/mod_unixd.html#group">Group</a></code>. For this reason, it is 135 important to control access to this account. The DAV repository 136 is considered private to Apache; modifying files outside of Apache 137 (for example using FTP or filesystem-level tools) should not be 138 allowed.</p> 139 140 <p><code class="module"><a href="/mod/mod_dav.html">mod_dav</a></code> may be subject to various kinds of 141 denial-of-service attacks. The <code class="directive"><a href="/mod/core.html#limitxmlrequestbody">LimitXMLRequestBody</a></code> directive can be 142 used to limit the amount of memory consumed in parsing large DAV 143 requests. The <code class="directive"><a href="#davdepthinfinity">DavDepthInfinity</a></code> directive can be 144 used to prevent <code>PROPFIND</code> requests on a very large 145 repository from consuming large amounts of memory. Another 146 possible denial-of-service attack involves a client simply filling 147 up all available disk space with many large files. There is no 148 direct way to prevent this in Apache, so you should avoid giving 149 DAV access to untrusted users.</p> 150</div><div class="top"><a href="#page-header"><img alt="top" src="/images/up.gif" /></a></div> 151<div class="section"> 152<h2><a name="complex" id="complex">Complex Configurations</a></h2> 153 154 <p>One common request is to use <code class="module"><a href="/mod/mod_dav.html">mod_dav</a></code> to 155 manipulate dynamic files (PHP scripts, CGI scripts, etc). This is 156 difficult because a <code>GET</code> request will always run the 157 script, rather than downloading its contents. One way to avoid 158 this is to map two different URLs to the content, one of which 159 will run the script, and one of which will allow it to be 160 downloaded and manipulated with DAV.</p> 161 162<pre class="prettyprint lang-config">Alias /phparea /home/gstein/php_files 163Alias /php-source /home/gstein/php_files 164<Location /php-source> 165 DAV On 166 ForceType text/plain 167</Location></pre> 168 169 170 <p>With this setup, <code>http://example.com/phparea</code> can be 171 used to access the output of the PHP scripts, and 172 <code>http://example.com/php-source</code> can be used with a DAV 173 client to manipulate them.</p> 174</div> 175<div class="top"><a href="#page-header"><img alt="top" src="/images/up.gif" /></a></div> 176<div class="directive-section"><h2><a name="Dav" id="Dav">Dav</a> <a name="dav" id="dav">Directive</a></h2> 177<table class="directive"> 178<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Enable WebDAV HTTP methods</td></tr> 179<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>Dav On|Off|<var>provider-name</var></code></td></tr> 180<tr><th><a href="directive-dict.html#Default">Default:</a></th><td><code>Dav Off</code></td></tr> 181<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>directory</td></tr> 182<tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Extension</td></tr> 183<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_dav</td></tr> 184</table> 185 <p>Use the <code class="directive">Dav</code> directive to enable the 186 WebDAV HTTP methods for the given container:</p> 187 188 <pre class="prettyprint lang-config"><Location /foo> 189 Dav On 190</Location></pre> 191 192 193 <p>The value <code>On</code> is actually an alias for the default 194 provider <code>filesystem</code> which is served by the <code class="module"><a href="/mod/mod_dav_fs.html">mod_dav_fs</a></code> module. Note, that once you have DAV enabled 195 for some location, it <em>cannot</em> be disabled for sublocations. 196 For a complete configuration example have a look at the <a href="#example">section above</a>.</p> 197 198 <div class="warning"> 199 Do not enable WebDAV until you have secured your server. Otherwise 200 everyone will be able to distribute files on your system. 201 </div> 202 203</div> 204<div class="top"><a href="#page-header"><img alt="top" src="/images/up.gif" /></a></div> 205<div class="directive-section"><h2><a name="DavDepthInfinity" id="DavDepthInfinity">DavDepthInfinity</a> <a name="davdepthinfinity" id="davdepthinfinity">Directive</a></h2> 206<table class="directive"> 207<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Allow PROPFIND, Depth: Infinity requests</td></tr> 208<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>DavDepthInfinity on|off</code></td></tr> 209<tr><th><a href="directive-dict.html#Default">Default:</a></th><td><code>DavDepthInfinity off</code></td></tr> 210<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config, virtual host, directory</td></tr> 211<tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Extension</td></tr> 212<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_dav</td></tr> 213</table> 214 <p>Use the <code class="directive">DavDepthInfinity</code> directive to 215 allow the processing of <code>PROPFIND</code> requests containing the 216 header 'Depth: Infinity'. Because this type of request could constitute 217 a denial-of-service attack, by default it is not allowed.</p> 218 219</div> 220<div class="top"><a href="#page-header"><img alt="top" src="/images/up.gif" /></a></div> 221<div class="directive-section"><h2><a name="DavMinTimeout" id="DavMinTimeout">DavMinTimeout</a> <a name="davmintimeout" id="davmintimeout">Directive</a></h2> 222<table class="directive"> 223<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Minimum amount of time the server holds a lock on 224a DAV resource</td></tr> 225<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>DavMinTimeout <var>seconds</var></code></td></tr> 226<tr><th><a href="directive-dict.html#Default">Default:</a></th><td><code>DavMinTimeout 0</code></td></tr> 227<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config, virtual host, directory</td></tr> 228<tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Extension</td></tr> 229<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_dav</td></tr> 230</table> 231 <p>When a client requests a DAV resource lock, it can also 232 specify a time when the lock will be automatically removed by 233 the server. This value is only a request, and the server can 234 ignore it or inform the client of an arbitrary value.</p> 235 236 <p>Use the <code class="directive">DavMinTimeout</code> directive to specify, in 237 seconds, the minimum lock timeout to return to a client. 238 Microsoft Web Folders defaults to a timeout of 120 seconds; the 239 <code class="directive">DavMinTimeout</code> can override this to a higher value 240 (like 600 seconds) to reduce the chance of the client losing 241 the lock due to network latency.</p> 242 243 <div class="example"><h3>Example</h3><pre class="prettyprint lang-config"><Location /MSWord> 244 DavMinTimeout 600 245</Location></pre> 246</div> 247 248</div> 249</div> 250<div class="bottomlang"> 251<p><span>Available Languages: </span><a href="/en/mod/mod_dav.html" title="English"> en </a> | 252<a href="/fr/mod/mod_dav.html" hreflang="fr" rel="alternate" title="Fran�ais"> fr </a> | 253<a href="/ja/mod/mod_dav.html" hreflang="ja" rel="alternate" title="Japanese"> ja </a> | 254<a href="/ko/mod/mod_dav.html" hreflang="ko" rel="alternate" title="Korean"> ko </a></p> 255</div><div class="top"><a href="#page-header"><img src="/images/up.gif" alt="top" /></a></div><div class="section"><h2><a id="comments_section" name="comments_section">Comments</a></h2><div class="warning"><strong>Notice:</strong><br />This is not a Q&A section. 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