S3_REQUEST_LINE (?:%{WORD:verb} %{NOTSPACE:request}(?: HTTP/%{NUMBER:httpversion})?|%{DATA:rawrequest})

S3_ACCESS_LOG %{WORD:owner} %{NOTSPACE:bucket} \[%{HTTPDATE:timestamp}\] %{IP:clientip} %{NOTSPACE:requester} %{NOTSPACE:request_id} %{NOTSPACE:operation} %{NOTSPACE:key} (?:"%{S3_REQUEST_LINE}"|-) (?:%{INT:response:int}|-) (?:-|%{NOTSPACE:error_code}) (?:%{INT:bytes:int}|-) (?:%{INT:object_size:int}|-) (?:%{INT:request_time_ms:int}|-) (?:%{INT:turnaround_time_ms:int}|-) (?:%{QS:referrer}|-) (?:"?%{QS:agent}"?|-) (?:-|%{NOTSPACE:version_id})

ELB_URIPATHPARAM %{URIPATH:path}(?:%{URIPARAM:params})?

ELB_URI %{URIPROTO:proto}://(?:%{USER}(?::[^@]*)?@)?(?:%{URIHOST:urihost})?(?:%{ELB_URIPATHPARAM})?

ELB_REQUEST_LINE (?:%{WORD:verb} %{ELB_URI:request}(?: HTTP/%{NUMBER:httpversion})?|%{DATA:rawrequest})

ELB_ACCESS_LOG %{TIMESTAMP_ISO8601:timestamp} %{NOTSPACE:elb} %{IP:clientip}:%{INT:clientport:int} (?:(%{IP:backendip}:?:%{INT:backendport:int})|-) %{NUMBER:request_processing_time:float} %{NUMBER:backend_processing_time:float} %{NUMBER:response_processing_time:float} %{INT:response:int} %{INT:backend_response:int} %{INT:received_bytes:int} %{INT:bytes:int} "%{ELB_REQUEST_LINE}"