Fixed date parsing and added support for root directory uploads

lib/src/client.dart

@@ -95,6 +95,7 @@ class Client {
   /// Recursively create folders
   Future<void> mkdirAll(String path, [CancelToken? cancelToken]) async {
     path = fixSlashes(path);
+
     var resp = await this.c.wdMkcol(this, path, cancelToken: cancelToken);
     var status = resp.statusCode;
     if (status == 201 || status == 405) {
@@ -107,9 +108,10 @@ class Client {
           continue;
         }
         sub += e + '/';
+
         resp = await this.c.wdMkcol(this, sub, cancelToken: cancelToken);
         status = resp.statusCode;
-        if (status != 201 && status != 405) {
+        if (status != 201 && status != 405 && status != 409) {
           throw newResponseError(resp);
         }
       }

lib/src/xml.dart

@@ -83,20 +83,55 @@ class WebdavXml {
 
             // create time
             final cTimeElements = findElements(prop, 'creationdate');
-            DateTime? cTime = cTimeElements.isNotEmpty
-                ? DateTime.parse(cTimeElements.single.text).toLocal()
-                : null;
+            DateTime? cTime;
+            try {
+              cTime = cTimeElements.isNotEmpty
+                  ? DateTime.parse(cTimeElements.single.text).toLocal()
+                  : null;
+            } catch (e) {
+              cTime = null;
+            }
 
             // modified time
             final mTimeElements = findElements(prop, 'getlastmodified');
-            DateTime? mTime = mTimeElements.isNotEmpty
-                ? str2LocalTime(mTimeElements.single.text)
+            DateTime? mTime;
+            try {
+              mTime = mTimeElements.isNotEmpty
+                  ? str2LocalTime(mTimeElements.single.text)
+                  : null;
+            } catch (e) {
+              mTime = null;
+            }
+
+            // displayname
+            final displayNameElements = findElements(prop, 'displayname');
+            String? displayName = displayNameElements.isNotEmpty
+                ? displayNameElements.single.text
                 : null;
 
-            //
-            var str = Uri.decodeFull(href);
-            var name = path2Name(str);
-            var filePath = path + name + (isDir ? '/' : '');
+            // Try to parse href to Uri. Use encoded version of hrefas fallback
+            // so filename with special characters wont lead to crash
+            var hrefAsUri =
+                Uri.tryParse(href) ?? Uri.tryParse(Uri.encodeFull(href));
+
+            String pathElementName;
+            String name;
+            // use manual path splitting as fallback
+            if (hrefAsUri != null) {
+              pathElementName = hrefAsUri.pathSegments.lastWhere(
+                (element) => element != "",
+                orElse: () => path2Name(href),
+              );
+            } else {
+              pathElementName = path2Name(href);
+            }
+
+            // some WebDav serve provides a custom name for path, if not use jsut the path name
+            name = displayName ?? pathElementName;
+            // uri.pathSegments will be decoded so we need to encode it back to sue
+            // it as path for further requests
+            var filePath =
+                path + Uri.encodeFull(pathElementName) + (isDir ? '/' : '');
 
             files.add(File(
               path: filePath,