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.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 2.2</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 2.2</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="/ja/mod/mod_dav.html" hreflang="ja" rel="alternate" title="Japanese"> ja </a> | 29<a href="/ko/mod/mod_dav.html" hreflang="ko" rel="alternate" title="Korean"> ko </a></p> 30</div> 31<table class="module"><tr><th><a href="module-dict.html#Description">Description:</a></th><td>Distributed Authoring and Versioning 32(<a href="http://www.webdav.org/">WebDAV</a>) functionality</td></tr> 33<tr><th><a href="module-dict.html#Status">Status:</a></th><td>Extension</td></tr> 34<tr><th><a href="module-dict.html#ModuleIdentifier">Module�Identifier:</a></th><td>dav_module</td></tr> 35<tr><th><a href="module-dict.html#SourceFile">Source�File:</a></th><td>mod_dav.c</td></tr></table> 36<h3>Summary</h3> 37 38 <p>This module provides class 1 and class 2 <a href="http://www.webdav.org">WebDAV</a> ('Web-based Distributed 39 Authoring and Versioning') functionality for Apache. This 40 extension to the HTTP protocol allows creating, moving, 41 copying, and deleting resources and collections on a remote web 42 server.</p> 43</div> 44<div id="quickview"><h3 class="directives">Directives</h3> 45<ul id="toc"> 46<li><img alt="" src="/images/down.gif" /> <a href="#dav">Dav</a></li> 47<li><img alt="" src="/images/down.gif" /> <a href="#davdepthinfinity">DavDepthInfinity</a></li> 48<li><img alt="" src="/images/down.gif" /> <a href="#davmintimeout">DavMinTimeout</a></li> 49</ul> 50<h3>Topics</h3> 51<ul id="topics"> 52<li><img alt="" src="/images/down.gif" /> <a href="#example">Enabling WebDAV</a></li> 53<li><img alt="" src="/images/down.gif" /> <a href="#security">Security Issues</a></li> 54<li><img alt="" src="/images/down.gif" /> <a href="#complex">Complex Configurations</a></li> 55</ul><h3>See also</h3> 56<ul class="seealso"> 57<li><code class="directive"><a href="/mod/mod_dav_fs.html#davlockdb">DavLockDB</a></code></li> 58<li><code class="directive"><a href="/mod/core.html#limitxmlrequestbody">LimitXMLRequestBody</a></code></li> 59<li><a href="http://www.webdav.org">WebDAV Resources</a></li> 60</ul><ul class="seealso"><li><a href="#comments_section">Comments</a></li></ul></div> 61<div class="top"><a href="#page-header"><img alt="top" src="/images/up.gif" /></a></div> 62<div class="section"> 63<h2><a name="example" id="example">Enabling WebDAV</a></h2> 64 <p>To enable <code class="module"><a href="/mod/mod_dav.html">mod_dav</a></code>, add the following to a 65 container in your <code>httpd.conf</code> file:</p> 66 67 <div class="example"><p><code>Dav On</code></p></div> 68 69 <p>This enables the DAV file system provider, which is implemented 70 by the <code class="module"><a href="/mod/mod_dav_fs.html">mod_dav_fs</a></code> module. Therefore, that module 71 must be compiled into the server or loaded at runtime using the 72 <code class="directive"><a href="/mod/mod_so.html#loadmodule">LoadModule</a></code> directive.</p> 73 74 <p>In addition, a location for the DAV lock database must be 75 specified in the global section of your <code>httpd.conf</code> 76 file using the <code class="directive"><a href="/mod/mod_dav_fs.html#davlockdb">DavLockDB</a></code> 77 directive:</p> 78 79 <div class="example"><p><code> 80 DavLockDB /usr/local/apache2/var/DavLock 81 </code></p></div> 82 83 <p>The directory containing the lock database file must be 84 writable by the <code class="directive"><a href="/mod/mpm_common.html#user">User</a></code> 85 and <code class="directive"><a href="/mod/mpm_common.html#group">Group</a></code> under which 86 Apache is running.</p> 87 88 <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 89 DAV-enabled locations. If you want to set the maximum amount of 90 bytes that a DAV client can send at one request, you have to use 91 the <code class="directive"><a href="/mod/core.html#limitxmlrequestbody">LimitXMLRequestBody</a></code> 92 directive. The "normal" <code class="directive"><a href="/mod/core.html#limitrequestbody">LimitRequestBody</a></code> directive has no effect on DAV 93 requests.</p> 94 95 <div class="example"><h3>Full Example</h3><p><code> 96 DavLockDB /usr/local/apache2/var/DavLock<br /> 97 <br /> 98 <Location /foo><br /> 99 <span class="indent"> 100 Order Allow,Deny<br /> 101 Allow from all<br /> 102 Dav On<br /> 103 <br /> 104 AuthType Basic<br /> 105 AuthName DAV<br /> 106 AuthUserFile user.passwd<br /> 107 <br /> 108 <LimitExcept GET OPTIONS><br /> 109 <span class="indent"> 110 Require user admin<br /> 111 </span> 112 </LimitExcept><br /> 113 </span> 114 </Location><br /> 115 </code></p></div> 116 117 <p><code class="module"><a href="/mod/mod_dav.html">mod_dav</a></code> is a descendent of Greg Stein's <a href="http://www.webdav.org/mod_dav/">mod_dav for Apache 1.3</a>. More 118 information about the module is available from that site.</p> 119</div><div class="top"><a href="#page-header"><img alt="top" src="/images/up.gif" /></a></div> 120<div class="section"> 121<h2><a name="security" id="security">Security Issues</a></h2> 122 123 <p>Since DAV access methods allow remote clients to manipulate 124 files on the server, you must take particular care to assure that 125 your server is secure before enabling <code class="module"><a href="/mod/mod_dav.html">mod_dav</a></code>.</p> 126 127 <p>Any location on the server where DAV is enabled should be 128 protected by authentication. The use of HTTP Basic Authentication 129 is not recommended. You should use at least HTTP Digest 130 Authentication, which is provided by the 131 <code class="module"><a href="/mod/mod_auth_digest.html">mod_auth_digest</a></code> module. Nearly all WebDAV clients 132 support this authentication method. An alternative is Basic 133 Authentication over an <a href="/ssl/">SSL</a> enabled 134 connection.</p> 135 136 <p>In order for <code class="module"><a href="/mod/mod_dav.html">mod_dav</a></code> to manage files, it must 137 be able to write to the directories and files under its control 138 using the <code class="directive"><a href="/mod/mpm_common.html#user">User</a></code> and 139 <code class="directive"><a href="/mod/mpm_common.html#group">Group</a></code> under which 140 Apache is running. New files created will also be owned by this 141 <code class="directive"><a href="/mod/mpm_common.html#user">User</a></code> and <code class="directive"><a href="/mod/mpm_common.html#group">Group</a></code>. For this reason, it is 142 important to control access to this account. The DAV repository 143 is considered private to Apache; modifying files outside of Apache 144 (for example using FTP or filesystem-level tools) should not be 145 allowed.</p> 146 147 <p><code class="module"><a href="/mod/mod_dav.html">mod_dav</a></code> may be subject to various kinds of 148 denial-of-service attacks. The <code class="directive"><a href="/mod/core.html#limitxmlrequestbody">LimitXMLRequestBody</a></code> directive can be 149 used to limit the amount of memory consumed in parsing large DAV 150 requests. The <code class="directive"><a href="#davdepthinfinity">DavDepthInfinity</a></code> directive can be 151 used to prevent <code>PROPFIND</code> requests on a very large 152 repository from consuming large amounts of memory. Another 153 possible denial-of-service attack involves a client simply filling 154 up all available disk space with many large files. There is no 155 direct way to prevent this in Apache, so you should avoid giving 156 DAV access to untrusted users.</p> 157</div><div class="top"><a href="#page-header"><img alt="top" src="/images/up.gif" /></a></div> 158<div class="section"> 159<h2><a name="complex" id="complex">Complex Configurations</a></h2> 160 161 <p>One common request is to use <code class="module"><a href="/mod/mod_dav.html">mod_dav</a></code> to 162 manipulate dynamic files (PHP scripts, CGI scripts, etc). This is 163 difficult because a <code>GET</code> request will always run the 164 script, rather than downloading its contents. One way to avoid 165 this is to map two different URLs to the content, one of which 166 will run the script, and one of which will allow it to be 167 downloaded and manipulated with DAV.</p> 168 169<div class="example"><p><code> 170Alias /phparea /home/gstein/php_files<br /> 171Alias /php-source /home/gstein/php_files<br /> 172<Location /php-source> 173<span class="indent"> 174 DAV On<br /> 175 ForceType text/plain<br /> 176</span> 177</Location> 178</code></p></div> 179 180 <p>With this setup, <code>http://example.com/phparea</code> can be 181 used to access the output of the PHP scripts, and 182 <code>http://example.com/php-source</code> can be used with a DAV 183 client to manipulate them.</p> 184</div> 185<div class="top"><a href="#page-header"><img alt="top" src="/images/up.gif" /></a></div> 186<div class="directive-section"><h2><a name="Dav" id="Dav">Dav</a> <a name="dav" id="dav">Directive</a></h2> 187<table class="directive"> 188<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Enable WebDAV HTTP methods</td></tr> 189<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>Dav On|Off|<var>provider-name</var></code></td></tr> 190<tr><th><a href="directive-dict.html#Default">Default:</a></th><td><code>Dav Off</code></td></tr> 191<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>directory</td></tr> 192<tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Extension</td></tr> 193<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_dav</td></tr> 194</table> 195 <p>Use the <code class="directive">Dav</code> directive to enable the 196 WebDAV HTTP methods for the given container:</p> 197 198 <div class="example"><p><code> 199 <Location /foo><br /> 200 <span class="indent"> 201 Dav On<br /> 202 </span> 203 </Location> 204 </code></p></div> 205 206 <p>The value <code>On</code> is actually an alias for the default 207 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 208 for some location, it <em>cannot</em> be disabled for sublocations. 209 For a complete configuration example have a look at the <a href="#example">section above</a>.</p> 210 211 <div class="warning"> 212 Do not enable WebDAV until you have secured your server. Otherwise 213 everyone will be able to distribute files on your system. 214 </div> 215 216</div> 217<div class="top"><a href="#page-header"><img alt="top" src="/images/up.gif" /></a></div> 218<div class="directive-section"><h2><a name="DavDepthInfinity" id="DavDepthInfinity">DavDepthInfinity</a> <a name="davdepthinfinity" id="davdepthinfinity">Directive</a></h2> 219<table class="directive"> 220<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Allow PROPFIND, Depth: Infinity requests</td></tr> 221<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>DavDepthInfinity on|off</code></td></tr> 222<tr><th><a href="directive-dict.html#Default">Default:</a></th><td><code>DavDepthInfinity off</code></td></tr> 223<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config, virtual host, directory</td></tr> 224<tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Extension</td></tr> 225<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_dav</td></tr> 226</table> 227 <p>Use the <code class="directive">DavDepthInfinity</code> directive to 228 allow the processing of <code>PROPFIND</code> requests containing the 229 header 'Depth: Infinity'. Because this type of request could constitute 230 a denial-of-service attack, by default it is not allowed.</p> 231 232</div> 233<div class="top"><a href="#page-header"><img alt="top" src="/images/up.gif" /></a></div> 234<div class="directive-section"><h2><a name="DavMinTimeout" id="DavMinTimeout">DavMinTimeout</a> <a name="davmintimeout" id="davmintimeout">Directive</a></h2> 235<table class="directive"> 236<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Minimum amount of time the server holds a lock on 237a DAV resource</td></tr> 238<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>DavMinTimeout <var>seconds</var></code></td></tr> 239<tr><th><a href="directive-dict.html#Default">Default:</a></th><td><code>DavMinTimeout 0</code></td></tr> 240<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config, virtual host, directory</td></tr> 241<tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Extension</td></tr> 242<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_dav</td></tr> 243</table> 244 <p>When a client requests a DAV resource lock, it can also 245 specify a time when the lock will be automatically removed by 246 the server. This value is only a request, and the server can 247 ignore it or inform the client of an arbitrary value.</p> 248 249 <p>Use the <code class="directive">DavMinTimeout</code> directive to specify, in 250 seconds, the minimum lock timeout to return to a client. 251 Microsoft Web Folders defaults to a timeout of 120 seconds; the 252 <code class="directive">DavMinTimeout</code> can override this to a higher value 253 (like 600 seconds) to reduce the chance of the client losing 254 the lock due to network latency.</p> 255 256 <div class="example"><h3>Example</h3><p><code> 257 <Location /MSWord><br /> 258 <span class="indent"> 259 DavMinTimeout 600<br /> 260 </span> 261 </Location> 262 </code></p></div> 263 264</div> 265</div> 266<div class="bottomlang"> 267<p><span>Available Languages: </span><a href="/en/mod/mod_dav.html" title="English"> en </a> | 268<a href="/ja/mod/mod_dav.html" hreflang="ja" rel="alternate" title="Japanese"> ja </a> | 269<a href="/ko/mod/mod_dav.html" hreflang="ko" rel="alternate" title="Korean"> ko </a></p> 270</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. Comments placed here should be pointed towards suggestions on improving the documentation or server, and may be removed again by our moderators if they are either implemented or considered invalid/off-topic. Questions on how to manage the Apache HTTP Server should be directed at either our IRC channel, #httpd, on Freenode, or sent to our <a href="http://httpd.apache.org/lists.html">mailing lists</a>.</div> 271<script type="text/javascript"><!--//--><![CDATA[//><!-- 272var comments_shortname = 'httpd'; 273var comments_identifier = 'http://httpd.apache.org/docs/2.2/mod/mod_dav.html'; 274(function(w, d) { 275 if (w.location.hostname.toLowerCase() == "httpd.apache.org") { 276 d.write('<div id="comments_thread"><\/div>'); 277 var s = d.createElement('script'); 278 s.type = 'text/javascript'; 279 s.async = true; 280 s.src = 'https://comments.apache.org/show_comments.lua?site=' + comments_shortname + '&page=' + comments_identifier; 281 (d.getElementsByTagName('head')[0] || d.getElementsByTagName('body')[0]).appendChild(s); 282 } 283 else { 284 d.write('<div id="comments_thread">Comments are disabled for this page at the moment.<\/div>'); 285 } 286})(window, document); 287//--><!]]></script></div><div id="footer"> 288<p class="apache">Copyright 2013 The Apache Software Foundation.<br />Licensed under the <a href="http://www.apache.org/licenses/LICENSE-2.0">Apache License, Version 2.0</a>.</p> 289<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></div><script type="text/javascript"><!--//--><![CDATA[//><!-- 290if (typeof(prettyPrint) !== 'undefined') { 291 prettyPrint(); 292} 293//--><!]]></script> 294</body></html>
