dissect parser
Dissect parsing inspired by logstash's dissect plugin.
Parses a string into a map.
The dissect parser was designed so that KV style parsing could be embedded into tremor's scripting language for extract operations.
The parser can also be used standalone. A fairly gnarly example of parsing logs from this libraries tests illustrates better than words can:
let pattern = r#"%{syslog_timestamp} %{syslog_hostname} %{?syslog_prog}: %{syslog_program_aux}[%{syslog_pid:int}] %{request_unix_time} %{request_timestamp} %{request_elapsed_time} %{server_addr}:%{server_port:int} %{remote_addr}:%{remote_port:int} "%{response_content_type}" %{response_content_length} %{request_status} %{bytes_sent} %{request_length} "%{url_scheme}" "%{http_host}" "%{request_method} %{request_url} %{request_protocol}" "%{http_referer}" "%{http_user_agent}" "%{http_x_forwarded_for}" "%{http_ttrue_client_ip}" "%{remote_user}" "%{is_bot}" "%{admin_user}" "%{http_via}" "%{response_location}" "%{set_cookie}" "%{http_cookie}" "%{moawsl_info}" "%{php_message}" "%{akamai_edgescape}" "%{uid_info}" "%{geoip_country}" "%{geoip_region}" "%{geoip_city}" "%{geoip_postal}" "%{geoip_dma}" "%{server_id}" "%{txid}" "%{hpcnt}" "%{client_accept}" "%{client_accept_charset}" "%{client_accept_encoding}" "%{client_accept_language}" "%{client_accept_datetime}" "%{client_pragma}" "%{client_transfer_encoding}" "%{client_attdeviceid}" "%{client_wap_profile}" %{weblog_end}"#;
let p = lex("%{name}%{_}%{_(|)}%{age}");
assert!(lex(pattern).is_ok());
assert!(p.is_ok());