Le 09/02/2020 à 19:21, Yuri Astrakhan a écrit :
Christian, I would like to add torrent support to the download-osm
tool [1]. While I could try to scrape
https://osm.cquest.org/torrents/ , I would obviously rather use the
structured xml file (or if you could provide a JSON file, even better).
If you have a model for such a json, I can add it.
Proposed logic:
* get the catalog file (xml/json)
* download the latest torrent
* (TBD) possibly use some magical aria2c options to stop the download
if it is not progressing and fallback to regular http, or possibly
pick a slightly older torrent (?). Suggestions are welcome -- see full
list of aria2c options [2]
[1]
https://github.com/openmaptiles/openmaptiles-tools#multi-streamed-osm-data-downloader
[2] https://aria2.github.io/manual/en/html/aria2c.html
I've not tested aria2c, but I tested lftp which supports bittorrent,
example:
lftp -c torrent
https://osm.cquest.org/torrents/planet-latest.osm.pbf.torrent
After the download is done, it switches to a background process to share
the file up to a ratio of 2:1.
Web seeds can be seen as fallback.
I don't know if lftp (or aria2c) supports web seeds, the lftp
documentation I found about the torrent support is minimal.
aria2c support metalink files, which could be something to also look at:
https://en.wikipedia.org/wiki/Metalink
--
Christian Quest - OpenStreetMap France
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