An async GeoRSS client library.
This library provides convenient async access to GeoRSS Feeds.
pip install aio-georss-client
|aio_georss_gdacs||Global Disaster Alert and Coordination System (GDACS)||Natural Disasters|
Each implementation extracts relevant information from the GeoJSON feed. Not all feeds contain the same level of information, or present their information in different ways.
After instantiating a particular class and supply the required parameters, you
update to retrieve the feed data. The return value will be a tuple
of a status code and the actual data in the form of a list of feed entries
specific to the selected feed.
- OK: Update went fine and data was retrieved. The library may still return empty data, for example because no entries fulfilled the filter criteria.
- OK_NO_DATA: Update went fine but no data was retrieved, for example because the server indicated that there was not update since the last request.
- ERROR: Something went wrong during the update
This library supports 3 different types of geometries:
- Bounding Box
By default each feed entry is using all available geometries from the external feed. If required however, you can exclude geometries by overriding FeedEntry#features and only return the geometries you want to support in your specific implementation.
The Feed Manager helps managing feed updates over time, by notifying the consumer of the feed about new feed entries, updates and removed entries compared to the last feed update.
- If the current feed update is the first one, then all feed entries will be reported as new. The feed manager will keep track of all feed entries' external IDs that it has successfully processed.
- If the current feed update is not the first one, then the feed manager will
produce three sets:
- Feed entries that were not in the previous feed update but are in the current feed update will be reported as new.
- Feed entries that were in the previous feed update and are still in the current feed update will be reported as to be updated.
- Feed entries that were in the previous feed update but are not in the current feed update will be reported to be removed.
- If the current update fails, then all feed entries processed in the previous feed update will be reported to be removed.
After a successful update from the feed, the feed manager provides two different dates:
last_updatewill be the timestamp of the last update from the feed irrespective of whether it was successful or not.
last_update_successfulwill be the timestamp of the last successful update from the feed. This date may be useful if the consumer of this library wants to treat intermittent errors from feed updates differently.
last_timestamp(optional, depends on the feed data) will be the latest timestamp extracted from the feed data. This requires that the underlying feed data actually contains a suitable date. This date may be useful if the consumer of this library wants to process feed entries differently if they haven't actually been updated.
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