Issue #747 use job connection for head request

Author: dsamaey

openeo/rest/_connection.py

@@ -210,7 +210,7 @@ def head(
         :param auth: optional custom authentication to use instead of the default one
         :return: response: Response
         """
-        return self.request("get", path=path, params=params, auth=auth, **kwargs)
+        return self.request("head", path=path, params=params, auth=auth, **kwargs)
 
     def post(self, path: str, json: Optional[dict] = None, **kwargs) -> Response:
         """

openeo/rest/job.py

@@ -423,7 +423,7 @@ def load_bytes(self) -> bytes:
 
 
     def _download_to_file(self, url: str, target: Path, chunk_size: int):
-        head = requests.head(url, stream=True)
+        head = self.job.connection.head(url, stream=True)
         if head.ok and 'Accept-Ranges' in head.headers and 'bytes' in head.headers['Accept-Ranges']:
             file_size = int(head.headers['Content-Length'])
             self._download_chunked(url=url, target=target, file_size=file_size, chunk_size=chunk_size)