changed default download chunk size to 10MB

issue528
this affects response.iter_content in the following functions:
- openeo.rest.connection.Connection.download
- openeo.rest.job.Job.download
- openeo.rest.userfile.UserFile.download

in Job.download the chunk size can still be overwritten by the user

CHANGELOG.md

@@ -10,7 +10,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 ### Added
 
 ### Changed
-
+- Changed default `chunk_size` of various `download` functions from None to 10MB. This should improve download speed of large files.
 ### Removed
 
 ### Fixed

openeo/rest/connection.py

@@ -1566,7 +1566,7 @@ def download(
 
         if outputfile is not None:
             with Path(outputfile).open(mode="wb") as f:
-                for chunk in response.iter_content(chunk_size=None):
+                for chunk in response.iter_content(chunk_size=10000000):
                     f.write(chunk)
         else:
             return response.content

openeo/rest/job.py

@@ -351,13 +351,14 @@ def __repr__(self):
             n=self.name, t=self.metadata.get("type", "unknown"), h=self.href
         )
 
-    def download(self, target: Optional[Union[Path, str]] = None, chunk_size=None) -> Path:
+    def download(self, target: Optional[Union[Path, str]] = None, chunk_size=10000000) -> Path:
         """
         Download asset to given location
 
         :param target: download target path. Can be an existing folder
             (in which case the filename advertised by backend will be used)
             or full file name. By default, the working directory will be used.
+        :param chunk_size: size of chunks to download (in bytes). Default is 10MB
         """
         target = Path(target or Path.cwd())
         if target.is_dir():

openeo/rest/userfile.py

@@ -66,7 +66,7 @@ def download(self, target: Union[Path, str] = None) -> Path:
         ensure_dir(target.parent)
 
         with target.open(mode="wb") as f:
-            for chunk in response.iter_content(chunk_size=None):
+            for chunk in response.iter_content(chunk_size=10000000):
                 f.write(chunk)
 
         return target