owncloud: add config owncloud_exclude_shares which allows to exclude shared files and folders when listing remote resources

backend/webdav/api/types.go

@@ -75,6 +75,7 @@ type Prop struct {
 	Size         int64     `xml:"DAV: prop>getcontentlength,omitempty"`
 	Modified     Time      `xml:"DAV: prop>getlastmodified,omitempty"`
 	Checksums    []string  `xml:"prop>checksums>checksum,omitempty"`
+	Permissions  string    `xml:"prop>permissions,omitempty"`
 	MESha1Hex    *string   `xml:"ME: prop>sha1hex,omitempty"` // Fastmail-specific sha1 checksum
 }
 

backend/webdav/webdav.go

@@ -149,6 +149,11 @@ Set to 0 to disable chunked uploading.
 `,
 			Advanced: true,
 			Default:  10 * fs.Mebi, // Default NextCloud `max_chunk_size` is `10 MiB`. See https://github.com/nextcloud/server/blob/0447b53bda9fe95ea0cbed765aa332584605d652/apps/files/lib/App.php#L57
+		}, {
+			Name:     "owncloud_exclude_shares",
+			Help:     "Exclude ownCloud shares",
+			Advanced: true,
+			Default:  false,
 		}},
 	})
 }
@@ -165,6 +170,7 @@ type Options struct {
 	Headers            fs.CommaSepList      `config:"headers"`
 	PacerMinSleep      fs.Duration          `config:"pacer_min_sleep"`
 	ChunkSize          fs.SizeSuffix        `config:"nextcloud_chunk_size"`
+	ExcludeShares      bool                 `config:"owncloud_exclude_shares"`
 }
 
 // Fs represents a remote webdav
@@ -702,6 +708,7 @@ var owncloudProps = []byte(`<?xml version="1.0"?>
   <d:resourcetype />
   <d:getcontenttype />
   <oc:checksums />
+  <oc:permissions />
  </d:prop>
 </d:propfind>
 `)
@@ -797,6 +804,11 @@ func (f *Fs) listAll(ctx context.Context, dir string, directoriesOnly bool, file
 				continue
 			}
 		}
+		if f.opt.ExcludeShares {
+			if strings.Contains(item.Props.Permissions, "S") {
+				continue
+			}
+		}
 		// 	item.Name = restoreReservedChars(item.Name)
 		if fn(remote, isDir, &item.Props) {
 			found = true