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#!/usr/bin/ruby

#
# Copyright (c) 2004 Peter Palfrader <peter@palfrader.org>
#
# All rights reserved.
#

require "ldap"
require "getoptlong"
require "myldap"
require "yaml"

@config = YAML::load( File.open( '/etc/noreply/config' ) )
ldap = MyLDAP.new(@config, "ldap2apache")
clients = ldap.conn.search2(@config['basedn'], LDAP::LDAP_SCOPE_SUBTREE, 'objectclass=tnClient')
# webstat
@rmagicdir = @config['module']['analog']['rmagic']
@webstat_location = @config['module']['analog']['webstat']

@defaultbind = @config['module']['apache']['defaultbind']
@defaultbindhttpport = @config['module']['apache']['defaultbindhttpport']
@defaultbindhttpsport = @config['module']['apache']['defaultbindhttpsport']
@configdir = @config['module']['apache']['configdir']
@postgres_uid = @config['module']['apache']['postgres_uid']
@www_gid = @config['module']['apache']['www_gid']
@configtest = @config['module']['apache']['configtest']
@reload = @config['module']['apache']['reload']
@statsbind = @config['module']['apache']['statsbind']
@statsvhostaddto = @config['module']['apache']['statsvhostaddto']

files = {}

def mkdir(dir, mode, uid, gid)
	Dir.mkdir(dir, mode) unless File.exists?(dir)
	# unless file is a symlink
	unless FileTest.symlink?(dir)
		File.chown(uid, gid, dir) == 1 or throw "chown #{dir} failed"
	end
end

clients.each{ |c|
	c['vhosts'] = ldap.conn.search2(c['dn'][0], LDAP::LDAP_SCOPE_SUBTREE, '(&(objectclass=tnWebVHost)(tnHost='+@config['thishost']+'))')
	client_home = c['homeDirectory'][0] or throw "No home for #{d['dn'][0]}"
	uid = c['uidNumber'][0].to_i
	gid = c['gidNumber'][0].to_i
	mkdir(client_home                 , 02755, 0, 0)
	mkdir(client_home+"/logs"         , 02750, 0, gid)
	mkdir(client_home+"/logs-archive" , 02750, 0, gid)
	mkdir(client_home+"/logs-for-stat", 02750, 0, gid)
	mkdir(client_home+"/pg"           , 02750, @postgres_uid, gid)
	c['vhosts'].each{ |vhost|
		bind = vhost['tnWebVHostBind'] ? vhost['tnWebVHostBind'][0] : @defaultbind
		bindhttpport = vhost['tnWebVHostBindHTTPPort'] ? vhost['tnWebVHostBindHTTPPort'][0] : @defaultbindhttpport
		bindhttpsport = vhost['tnWebVHostBindHTTPSPort'] ? vhost['tnWebVHostBindHTTPSPort'][0] : @defaultbindhttpsport
		server_name = vhost['tnWebVHostServerName'][0]
		server_admin = vhost['tnWebVHostWebmaster'][0]
		server_aliases = (vhost['tnWebVHostServerAlias'] or []).join(" ")
		home = client_home +"/"+ vhost['tnWebVHostHomeDirectory'][0]
		property = {}
		if vhost['tnWebVHostProperties']
			vhost['tnWebVHostProperties'].each{ |prop|
				(key, val) = prop.split('=', 2)
				property[key] = val
			}
		end
		property['php'] = "no" unless property['php'] == "yes"

		dirindex = vhost['tnWebVHostDirectoryIndex'][0] if vhost['tnWebVHostDirectoryIndex']

		docdiroptions = (vhost['tnWebVHostDocDirOptions'] or []).join(" ")
		cgidiroptions = (vhost['tnWebVHostCgiDirOptions'] or []).join(" ")

		docdiroptions += " Includes" if property['ssi'] == "yes"

		addto = vhost['tnWebVHostAddto'][0].gsub("\n", "\n\t") if vhost['tnWebVHostAddto']
		docdiraddto = vhost['tnWebVHostDocDirAddto'][0].gsub("\n", "\n\t") if vhost['tnWebVHostDocDirAddto']
		cgidiraddto = vhost['tnWebVHostCgiDirAddto'][0].gsub("\n", "\n\t") if vhost['tnWebVHostCgiDirAddto']

		ssl = true if property['https'] == "only"
		vhostgid = property['DirOwnerGroupNumber'] ? property['DirOwnerGroupNumber'].to_i : gid

		umask=File.umask
		File.umask(0000)
		mkdir(home, 02755, uid, vhostgid)
		mkdir(home+"/htdocs", 02755, uid, vhostgid)
		mkdir(home+"/bin", 02755, 0, vhostgid)
		mkdir(home+"/cgi-bin", 02755, uid, vhostgid) if property['cgi-bin'] == "yes"
		mkdir(home+"/tmp", 03775, uid, @www_gid)
		File.umask(umask)

		basedir = "#{home}"
		if property['open_basedir']
			if property['open_basedir'] != "none"
				basedir += ":" + property['open_basedir']
			else
				basedir = nil
			end
		end
		if property['safemode_include']
			safemode_include = property['safemode_include']
		end
		config = []
		if ssl
			crtfile = "/etc/ssl/certs/apache-#{server_name}.pem"
			keyfile = "/etc/ssl/private/apache-#{server_name}.key"
			STDERR.puts "Warning: #{crtfile} does not exist" unless FileTest.exists?(crtfile)
			STDERR.puts "Warning: #{keyfile} does not exist" unless FileTest.exists?(keyfile)

			config << "<VirtualHost #{bind}:#{bindhttpsport}>"
			config << "	SSLEngine on"
			config << "	SSLCertificateFile    #{crtfile}"
			config << "	SSLCertificateKeyFile #{keyfile}"
			config << '	<Files ~ "\.php$">'
			config << '		SSLOptions +StdEnvVars'
			config << '	</Files>'
			config << '	SetEnvIf User-Agent ".*MSIE.*" nokeepalive ssl-unclean-shutdown'
			config << ''
		else
			config << "<VirtualHost #{bind}:#{bindhttpport}>"
		end
		config << "	ServerName #{server_name}"
		config << "	ServerAlias #{server_aliases}" if server_aliases != ""
		config << "	ServerAdmin #{server_admin}"
		config << ""
		if property['canonical'] == "yes"
			config << "	RewriteEngine on"
			config << "	RewriteCond %{HTTP_HOST} !^#{server_name}$"
			config << "	RewriteRule ^/(.*) %s://#{server_name}/$1 [R]"%[ ( ssl ? 'https' : 'http' ) ]
		end
		config << ""
		config << "	UserDir disabled" unless property['userdir'] == "yes"
		config << "	SuexecUserGroup #{c['uid']} #{c['uid']}" unless property['setusergroup'] == "no"
		#config << "	User #{c['uid']}" unless property['setusergroup'] == "no"
		#config << "	Group #{c['uid']}" unless property['setusergroup'] == "no"
		config << "	ErrorLog #{client_home}/logs/#{server_name}-error.log"
		config << "	LogLevel warn"
		config << "	CustomLog #{client_home}/logs/#{server_name}-access.log combined"
		config << "	ServerSignature On"
		config << ""
		# webstats
		#config << "	# Alias " + @webstat_location + " " + @rmagicdir + "/" + server_name + "/"
		#config << '	Alias /awstats-classes/ "/usr/share/awstats/classes/"'
		#config << '	Alias /awstats-css/ "/usr/share/awstats/css/"'
		#config << '	Alias /awstats-icon/ "/usr/share/awstats/icon/"'
		#config << "	ScriptAlias /cgi-stats/awstats.pl /usr/lib/cgi-bin/awstats.pl"
		#config << "	Redirect permanent " + @webstat_location + " http://"+server_name+"/cgi-stats/awstats.pl"
		config << ""
		unless property['php'] == "no"
			config << "	php_admin_value engine 1"
			unless property['safe_mode'] == "no"
				config << "	php_admin_value safe_mode 1"
				config << "	php_admin_value safe_mode_gid 1"
				config << "	php_admin_value safe_mode_exec_dir \"#{home}/bin\""
			end
			config << "	php_admin_value upload_tmp_dir \"#{home}/tmp\""
			config << "	php_admin_value sendmail_path  \"/usr/sbin/sendmail -t -i -f #{server_admin}\""
			config << "	php_admin_value allow_url_fopen 0"
		else
			config << "	php_admin_value engine off"
			config << "	AddType text/plain .php3"
			config << "	AddType text/plain .php3s"
			config << "	AddType text/plain .php"
			config << "	AddType text/plain .php4"
			config << "	AddType text/plain .phps"
		end
		unless property['document_root'] == "manual"
			config << "	DocumentRoot #{home}/htdocs"
		end
		config << "#	<Directory #{home}/htdocs>"
		config << "	<Location />"
		config << "		AllowOverride FileInfo AuthConfig Limit Indexes Options"
		config << "		IndexOptions FancyIndexing NameWidth=*"
		unless property['php'] == "no"
			config << "		php_value magic_quotes_gpc 0"
			config << "		php_admin_value open_basedir \"#{basedir}\"" if basedir
			config << "		php_admin_value safe_mode_include_dir \"#{safemode_include}\"" if safemode_include
			config << "		php_value include_path \".:#{home}/include:/usr/share/php:/usr/share/pear\"" if basedir
		end
		config << "		Options #{docdiroptions}" if docdiroptions != ""
		config << "		#{docdiraddto}" if docdiraddto
		config << "		DirectoryIndex #{dirindex}" if dirindex
		config << "		AddHandler server-parsed .html"  if property['ssi'] == 'yes'
		config << "		AddType text/html .shtml"        if property['ssi'] == 'yes'
		config << "		AddHandler server-parsed .shtml" if property['ssi'] == 'yes'
		config << ""
		config << "		Order allow,deny"
		if property['allowfrom']
			property['allowfrom'].split(/  */).each do |l|
				config << "		Allow from #{l}"
			end
		else
			config << "		Allow from all"
		end
		config << "	</Location>"
		config << "#	</Directory>"
		if property['cgi-bin'] == "yes"
			cgihome = home.gsub(/^\/srv\/www\/vhosts/, '/var/www/vhosts')
			config << "	ScriptAlias /cgi-bin #{cgihome}/cgi-bin"
			config << "	<Directory #{cgihome}/cgi-bin>"
			config << "		AllowOverride FileInfo AuthConfig Limit Indexes"
			config << "		Options ExecCGI #{cgidiroptions}"
			config << "		#{cgidiraddto}" if cgidiraddto
			config << "	</Directory>"
		end
		config << "	#{addto}" if addto
		#
		# webstats, part I - proxy to our second webserver
		unless property['stats'] == "no"
			config << '	Alias /awstats-classes/ "/usr/share/awstats/classes/"'
			config << '	Alias /awstats-css/ "/usr/share/awstats/css/"'
			config << '	Alias /awstats-icon/ "/usr/share/awstats/icon/"'
			config << "	<IfModule mod_proxy.c>"
			config << "		ProxyPass /webstats/ http://#{@statsbind}/"
			config << "		ProxyPassReverse /webstats/ http://#{@statsbind}/"
			config << "		ProxyPreserveHost on"
			config << "	</IfModule>"

		end
		config << "</VirtualHost>"
		config << '# vim:ft=apache:'
		throw "Clash on #{server_name} of client#{c['o'][0]}" if files[ c['o'][0] +"-"+ server_name ]
		files[ c['o'][0] +"-"+ server_name ] = config

		if ssl
			config = []
			config << "<VirtualHost #{bind}:#{bindhttpport}>"
			config << "	ServerName #{server_name}"
			config << "	ServerAlias #{server_aliases}" if server_aliases != ""
			config << "	ServerAdmin #{server_admin}"
			config << "	UserDir disabled"
			config << "	ErrorLog #{client_home}/logs/#{server_name}-error.log"
			config << "	LogLevel warn"
			config << "	CustomLog #{client_home}/logs/#{server_name}-access.log combined"
			config << "	ServerSignature On"
			config << "	RewriteEngine on"
			config << "	RewriteRule ^/(.*)$ https://#{server_name}/$1 [L,R]"
			config << "</VirtualHost>"
			config << '# vim:ft=apache:'

			sn2 = server_name +'-redir'
			throw "Clash on #{sn2} of client#{c['o'][0]}" if files[ c['o'][0] +"-"+ sn2 ]
			files[ c['o'][0] +"-"+ sn2 ] = config
		end
		#
		# webstats, part II  - we need our own vhost since we can't have suexec enabled
		unless property['stats'] == "no"
			config = []
			config << "<VirtualHost #{@statsbind}>"
			config << "	ServerName #{server_name}"
			config << "	ServerAdmin #{server_admin}"
			config << "	UserDir disabled"
			config << "#	ErrorLog #{client_home}/logs/stats.#{server_name}-error.log"
			config << "#	LogLevel warn"
			config << "#	CustomLog #{client_home}/logs/stats.#{server_name}-access.log combined"
			config << "	ServerSignature On"
			config << ""
			config << '	Alias /awstats-classes/ "/usr/share/awstats/classes/"'
			config << '	Alias /awstats-css/ "/usr/share/awstats/css/"'
			config << '	Alias /awstats-icon/ "/usr/share/awstats/icon/"'
			config << "	ScriptAlias /awstats.pl /usr/lib/cgi-bin/awstats.pl"
			config << "	ScriptAlias / /usr/lib/cgi-bin/awstats.pl"
			config << ""
			config << "	#{@statsvhostaddto}" if @statsvhostaddto
			config << "</VirtualHost>"
			config << '# vim:ft=apache:'

			sn2 = server_name +'-stats'
			throw "Clash on #{sn2} of client#{c['o'][0]}" if files[ c['o'][0] +"-"+ sn2 ]
			files[ c['o'][0] +"-"+ sn2 ] = config
		end
	}
}

need_reload = false
Dir.entries( @configdir ).each{ |e|
	next if ((e =~ /^\./) != nil)
	next if files.has_key?( e )
	File.unlink( @configdir + '/' + e )
	need_reload = true
}

files.each_pair{ |name, config|
	filename = @configdir + '/' + name
	conf = config.join("\n") + "\n"
	on_disk = FileTest.exists?(filename) ?  File.read(filename) : nil
	next if on_disk == conf

	f = File.new( filename, "w" )
	f.write(conf)
	f.close

	need_reload = true
}

if need_reload
	system(@configtest) or throw "Configtest returned errors."
	system(@reload) or throw "Reload returned errors."
end