<Macro vstatic-vhost-extra-manpages.debian.org>
	RequestHeader set Accept-Encoding "expr=gzip,%{req:Accept-Encoding}" early
	AddDefaultCharset utf-8

	# Replace e.g. pt-BR with pt_BR.
	RequestHeader edit Accept-Language "-" "_" early

	# Only SetEnvIf gets called _before_ RewriteRule.
	SetEnvIf Accept-Language "^(.*)$" ACCLANG=$1 INITIAL=t
	SetEnvIf Accept-Language "^$" ACCLANG=en INITIAL=t

	RewriteEngine on
	RewriteMap manpagesall dbm:/srv/static.debian.org/mirrors/manpages.debian.org/cur/rwmap.dbm
	RewriteMap lc int:tolower

	# Redirect old CGI paths (without CGI file name), keeping at least the
	# manpage (the other parameters are left out for simplicity).
	RewriteCond %{QUERY_STRING} (?:.*(?:^|&))query=([^&]+)
	RewriteRule ^/?$ /%1 [redirect=307,qsdiscard,last]

	# URLs which end in a slash do not need to be rewritten
	RewriteRule /$ - [last]

	# Redirect old CGI paths, keeping at least the manpage (the other
	# parameters are left out for simplicity).
	RewriteCond %{QUERY_STRING} ^$
	RewriteRule ^/cgi-bin/man.cgi$ / [redirect=301,last]
	RewriteCond %{QUERY_STRING} (?:.*(?:^|&))query=([^&]+)
	RewriteRule ^/cgi-bin/man.cgi /%1 [redirect=307,qsdiscard,last]

	# legacy manpages.debian.org patterns
	RewriteCond "%{env:INITIAL}" "=t"
	RewriteRule ^/man/0/(.*$) /$1
	RewriteCond "%{env:INITIAL}" "=t"
	RewriteRule ^/man/([0-9ln]p?m?)/(.*$) /$2.$1

	RewriteCond "%{env:INITIAL}" "=t"
	RewriteRule ^/man0/(.*$) /$1
	RewriteCond "%{env:INITIAL}" "=t"
	RewriteRule ^/man([0-9ln]p?m?)/(.*$) /$2.$1
	RewriteCond "%{env:INITIAL}" "=t"
	RewriteRule ^/([^/]+)/man0/(.*$) /$2.$1
	RewriteCond "%{env:INITIAL}" "=t"
	RewriteRule ^/([^/]+)/man([0-9ln]p?m?)/(.*$) /$3.$2.$1

	RewriteCond "%{env:INITIAL}" "=t"
	RewriteRule ^/man/([a-z]*)/([^/]+)/0/(.*$) /$1/$3.$2
	RewriteCond "%{env:INITIAL}" "=t"
	RewriteRule ^/man/([a-z]*)/([^/]+)/([0-9ln]p?m?)/(.*$) /$1/$4.$3.$2
	RewriteCond "%{env:INITIAL}" "=t"
	RewriteRule ^/man/([a-z]*)/0/(.*$) /$1/$2
	RewriteCond "%{env:INITIAL}" "=t"
	RewriteRule ^/man/([a-z]*)/([0-9ln]p?m?)/(.*$) /$1/$3.$2

	RewriteCond "%{env:INITIAL}" "=t"
	RewriteRule ^/0/(.*$) /$1
	RewriteCond "%{env:INITIAL}" "=t"
	RewriteRule ^/([0-9ln]p?m?)/(.*$) /$2.$1

	RewriteCond "%{env:INITIAL}" "=t"
	RewriteRule ^/man/([^/]+)/(.*$) /$2.$1
	RewriteCond "%{env:INITIAL}" "=t"
	RewriteRule ^/man/(.*$) /$1

	# chomp off the first language tag for use in the following rules
	RewriteCond "%{env:ACCLANG}" "^([^,;]+)"
	RewriteRule .* - [E=ACCTOK:%1]

	RewriteCond "${manpagesall:${lc:$1}.%{env:ACCTOK}}" "^(.+)$"
	RewriteRule ^(.+)$ %1 [redirect=307,last]

	# Example Accept-Language header:
	# en-US,en;q=0.8,de-CH;q=0.6,de;q=0.4

	RewriteRule .* - [E=!INITIAL]

	# while ACCLANG is non-empty, repeat
	RewriteCond "%{env:ACCLANG}" "^(?:[^,]+),(.+)"
	RewriteRule .* - [E=ACCLANG:%1,N]

	# fallback: maybe the language is already present?
	RewriteCond "${manpagesall:${lc:$1}}" "^(.+)$"
	RewriteRule ^(.+)$ %1 [redirect=307,last]

	<Directory /srv/static.debian.org/mirrors/manpages.debian.org/cur>
		ExpiresActive On
		ExpiresDefault "access plus 1 hours"

		<Files ~ "^rwmap">
			Require all denied
		</Files>

		# DefaultType doesn’t work since Apache 2.3.x, so we need to match
		# non-HTML files to work around https://bugs.debian.org/880542
		<FilesMatch "(?<!\.html)\.gz$">
			ForceType text/plain
		</FilesMatch>

		# To set the correct Content-Type (e.g. text/html).
		RemoveType .gz
		AddEncoding gzip gz
		FilterDeclare gzip CONTENT_SET
		FilterProvider gzip inflate "%{req:Accept-Encoding} !~ /gzip,.*gzip/"
		FilterChain gzip
		Options +Multiviews
	</Directory>

	ErrorDocument 404 https://dyn.manpages.debian.org%{REQUEST_URI}?%{QUERY_STRING}
</Macro>

# vim:ft=apache: