508 Loop Detected

508 Loop Detected

PROPFIND /Coll/ HTTP/1.1
Host: example.com
Depth: infinity
Content-Type: application/xml; charset="utf-8"
Content-Length: 125

<?xml version="1.0" encoding="utf-8" ?>
<D:propfind xmlns:D="DAV:">
  <D:prop> <D:displayname/> </D:prop>
</D:propfind>

HTTP/1.1 508 Loop Detected
Content-Type: application/json; charset=utf-8
Server: Microsoft-IIS/8.0
Date: Wed, 15 May 2013 02:38:57 GMT
Content-Length: 72

{
  "Message": "请检查资源是否存在循环引用，然后重试。"
}