Download Handlers¶
With GeoNode 4.2.x has been introduced the concept of Download Handler and ofc GeoNode provides a default implementation of it which process the download via WPS
Follow an example of how to create a custom download handler and to replace the default one or add an additional one.
Settings¶
DEFAULT_DATASET_DOWNLOAD_HANDLER¶
Default:
geonode.layers.download_handler.DatasetDownloadHandler
path to the download handler location
DATASET_DOWNLOAD_HANDLERS¶
Default:
[]
List of paths of the additional download handlers
CODE¶
The default download handler is placed under the geonode.layers [package](https://github.com/GeoNode/geonode/blob/master/geonode/layers/download_handler.py)
Follow an example of an basic class for define the download handler:
- class DatasetDownloadHandler:
- def __str__(self):
return f”{self.__module__}.{self.__class__.__name__}”
- def __repr__(self):
return self.__str__()
- def __init__(self, request, resource_name) -> None:
self.request = request self.resource_name = resource_name self._resource = None
- def get_download_response(self):
“”” Main method used, this method should return the response object “”” return response @property
- def download_url(self):
“”” Used by the API, it should return the URL where the resource can be downloaded from “”” return reverse(“dataset_download”, args=[resource.alternate])
If you prefer to inherit from the already existing one, the response is generated in the process_dowload method