Seen in Logstash (heavily trimmed):
{
"_index": "logstash-2016.03.22", "_type": "restbase", "_source": { "host": "restbase1006", "level": "WARNING", "@timestamp": "2016-03-22T07:47:45.697Z", "from": "Megabalanus coccopoma", "to": "Megabalanus_coccopoma", "levelPath": "warn/normalize/space", "root_req.method": "get", "root_req.uri": "/en.wikipedia.org/v1/page/html/Megabalanus%20coccopoma", "root_req.headers.content-length": "0", "root_req.headers.user-agent": "cxserver", "root_req.headers.x-request-class": "internal",
}
See also "[Wikitech-l] REST API soon redirecting to canonical URLs".