Fix FileLike object to implement file-like interface

- Add seek(), tell(), read() methods to FileLike class
- Add content_type attribute for validation
- Fixes 'FileLike object has no attribute seek' error in chunked uploads

app/upload/routes.py

@@ -989,6 +989,38 @@ def finalize_upload():
                 self.path = path
                 self.filename = filename
                 self.name = filename
+                self.content_type = 'application/zip'  # Default for ZIP files
+                self._file = None
+                self._pos = 0
+
+            def __enter__(self):
+                self._file = open(self.path, 'rb')
+                return self
+
+            def __exit__(self, exc_type, exc_val, exc_tb):
+                if self._file:
+                    self._file.close()
+
+            def read(self, size=-1):
+                if self._file is None:
+                    self._file = open(self.path, 'rb')
+                if size == -1:
+                    data = self._file.read()
+                else:
+                    data = self._file.read(size)
+                self._pos += len(data)
+                return data
+
+            def seek(self, pos, whence=0):
+                if self._file is None:
+                    self._file = open(self.path, 'rb')
+                self._file.seek(pos, whence)
+                self._pos = self._file.tell()
+
+            def tell(self):
+                if self._file is None:
+                    self._file = open(self.path, 'rb')
+                return self._file.tell()
 
             def save(self, dst):
                 shutil.move(self.path, dst)