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liza/src/server/log/AccessLog.js

80 lines
2.5 KiB
JavaScript

/**
* HTTP access log
*
* Copyright (C) 2017 LoVullo Associates, Inc.
*
* This file is part of the Liza Data Collection Framework.
*
* liza is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as
* published by the Free Software Foundation, either version 3 of the
* License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
var Class = require( 'easejs' ).Class,
UserRequest = require( '../request/UserRequest' );
/**
* Logs HTTP access in Apache's combined log format
*/
module.exports = Class( 'AccessLog' )
.extend( require( './Log' ),
{
/**
* Monitors a user request for the end of the connection and adds an entry
* to the access log
*
* @param UserRequest user_request
*
* @return AccessLog self
*/
'public attach': function( user_request )
{
if ( !( Class.isA( UserRequest, user_request ) ) )
{
throw new TypeError(
'UserRequest expected, ' + ( user_request.toString() ) +
' given'
);
}
var self = this,
request = user_request.getRequest();
// log when the request is complete
user_request.on( 'end', function()
{
// determine the remote address (in case we're behind a proxy, look
// at X-Forwarded-For)
var remote_addr = user_request.getRemoteAddr(),
username = user_request.getSession().agentId() || '-';
// access log (apache combined log format)
self.write( '%s %s - - [%s] "%s %s HTTP/%s" %d %d "%s" "%s"',
remote_addr,
username,
new Date(),
request.method,
request.url,
request.httpVersion,
user_request.getResponseCode(),
user_request.getResponseLength(),
request.headers['referer'] || '-',
request.headers['user-agent'] || '-'
);
});
return this;
}
} );