Option Name:logformat
Default Value:none
Suggested Config:


	logformat <name> <format specification>

	Defines an access log format.

	The <format specification> is a string with embedded % format codes

	% format codes all follow the same basic structure where all but
	the formatcode is optional. Output strings are automatically escaped
	as required according to their context and the output format
	modifiers are usually not needed, but can be specified if an explicit
	output format is desired.

		% ["|[|'|#] [-] [[0]width] [{argument}] formatcode

		"	output in quoted string format
		[	output in squid text log format as used by log_mime_hdrs
		#	output in URL quoted format
		'	output as-is

		-	left aligned
		width	field width. If starting with 0 the
			output is zero padded
		{arg}	argument such as header name etc

	Format codes:

		>a	Client source IP address
		>A	Client FQDN
		>p	Client source port
		<A	Server IP address or peer name
		la	Local IP address (http_port)
		lp	Local port number (http_port)
		ts	Seconds since epoch
		tu	subsecond time (milliseconds)
		tl	Local time. Optional strftime format argument
			default %d/%b/%Y:%H:%M:%S %z
		tg	GMT time. Optional strftime format argument
			default %d/%b/%Y:%H:%M:%S %z
		tr	Response time (milliseconds)
		>h	Request header. Optional header name argument
			on the format header[:[separator]element]
		<h	Reply header. Optional header name argument
			as for >h
		un	User name
		ul	User name from authentication
		ui	User name from ident
		us	User name from SSL
		ue	User name from external acl helper
		Hs	HTTP status code
		Ss	Squid request status (TCP_MISS etc)
		Sh	Squid hierarchy status (DEFAULT_PARENT etc)
		mt	MIME content type
		rm	Request method (GET/POST etc)
		ru	Request URL
		rp	Request URL-Path excluding hostname
		rv	Request protocol version
		et	Tag returned by external acl
		ea	Log string returned by external acl
		<st	Reply size including HTTP headers
		>st	Request size including HTTP headers
		st	Request+Reply size including HTTP headers
		<sH	Reply high offset sent
		<sS	Upstream object size
		%	a literal % character

	The default formats available (which do not need re-defining) are:

logformat squid %ts.%03tu %6tr %>a %Ss/%03Hs %<st %rm %ru %un %Sh/%<A %mt
logformat squidmime %ts.%03tu %6tr %>a %Ss/%03Hs %<st %rm %ru %un %Sh/%<A %mt [%>h] [%<h]
logformat common %>a %ui %un [%tl] "%rm %ru HTTP/%rv" %Hs %<st %Ss:%Sh
logformat combined %>a %ui %un [%tl] "%rm %ru HTTP/%rv" %Hs %<st "%{Referer}>h" "%{User-Agent}>h" %Ss:%Sh