These extractors are able to parse the standard HAProxy HTTP logs. Example log message:
haproxy[12345]: 92.211.35.123:58507 [10/Jul/2014:08:15:48.478] fe-https-in~ backend1/server2 2055/0/0/160/2215 200 8638 - - ---- 1/1/0/1/0 0/0 "GET / HTTP/1.1"
Will extract fields haproxy_client_ip, haproxy_request_date, haproxy_frontend_name, haproxy_backend_name, haproxy_server_name, haproxy_times, haproxy_status_code, haproxy_bytes_read, haproxy_http_request, haproxy_http_method, haproxy_http_path, haproxy_http_version, haproxy_tr, haproxy_tw, haproxy_tc, haproxy_tr, haproxy_ta.
Originally created by Daniel Kerwin (Gini GmbH).