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:

```python

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