bxb100 opened a new issue, #1782:
URL: https://github.com/apache/incubator-opendal/issues/1782

   According to [RFC 4918](https://www.rfc-editor.org/rfc/rfc4918#section-9.1) 
   >  The PROPFIND method retrieves properties defined on the resource 
identified by the Request-URI
   
   the code 
https://github.com/apache/incubator-opendal/blob/1d563b42e10834d3726ef71458d2cea6c948351c/core/src/services/obs/backend.rs#L375
   
   can't achieve file `content-length` in some WebDAV servers, such as 
[jianguoyun](https://www.jianguoyun.com/)
   
   should using `propfind` to get `getcontentlength` `getcontenttype` 
`getlastmodified` `getetag`
   
   ```xml
   
   <d:multistatus xmlns:d="\&quot;DAV:\&quot;" 
xmlns:s="\&quot;http://ns.jianguoyun.com\&quot;";>
       <d:response>
           <d:href>/dav/cs/test</d:href>
           <d:propstat>
               <d:prop>
                   <d:getetag>xxxx</d:getetag>
                   <d:getcontenttype>application/octet-stream</d:getcontenttype>
                   <d:displayname>test</d:displayname>
                   <d:owner>xxxx</d:owner>
                   <d:getcontentlength>13</d:getcontentlength>
                   <d:getlastmodified>Mon, 27 Mar 2023 08:12:39 
GMT</d:getlastmodified>
                   <d:resourcetype></d:resourcetype>
                   <d:current-user-privilege-set>
                       <d:privilege>
                           <d:read></d:read>
                       </d:privilege>
                       <d:privilege>
                           <d:write></d:write>
                       </d:privilege>
                       <d:privilege>
                           <d:all></d:all>
                       </d:privilege>
                       <d:privilege>
                           <d:read_acl></d:read_acl>
                       </d:privilege>
                       <d:privilege>
                           <d:write_acl></d:write_acl>
                       </d:privilege>
                   </d:current-user-privilege-set>
               </d:prop>
               <d:status>HTTP/1.1 200 OK</d:status>
           </d:propstat>
       </d:response>
   </d:multistatus>
   ```
   
   ## Reference
   
   * 
[webdav-client](https://github.com/perry-mitchell/webdav-client/blob/8d9694613c978ce7404e26a401c39a41f125f87f/source/operations/stat.ts#L8)


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