url-downloader is a Squid caching proxy for HTTP requests. It was originally created for MediaWiki's upload-by-URL functionality.
- See also url_downloader in Puppet.
- For eqiad: Hosted on
- For codfw: Hosted on
In both datacenters only one url-downloader is active at any time, and is pointed at via the DNS record for
url-downloader.$DC.wikimedia.org, and exposed at
url-downloader.wikimedia.org:8080 points to eqiad for backward-compatibility.
In MediaWiki configuration, it would be typically obtained via
$wmfLocalServices['urldownloader'] (which also provides an appropriate proxy URL on beta).