A port of log4js to node.js
The connect/express logger was added to log4js by danbell. This allows connect/express servers to log using log4js. See example-connect-logger.js
.
var log4js = require('./lib/log4js');
var express = require('express');
log4js.configure({
appenders: {
console: { type: 'console' },
file: { type: 'file', filename: 'cheese.log' }
},
categories: {
cheese: { appenders: ['file'], level: 'info' },
default: { appenders: ['console'], level: 'info' }
}
});
var logger = log4js.getLogger('cheese');
var app = express();
app.use(log4js.connectLogger(logger, { level: 'info' }));
app.get('/', function(req,res) {
res.send('hello world');
});
app.listen(5000);
The log4js.connectLogger supports the passing of an options object that can be used to set the following:
The options object that is passed to log4js.connectLogger supports a format string the same as the connect/express logger. For example:
app.use(log4js.connectLogger(logger, { level: log4js.levels.INFO, format: ':method :url' }));
Added automatic level detection to connect-logger, depends on http status response, compatible with express 3.x and 4.x.
app.use(log4js.connectLogger(logger, { level: 'auto' }));
The log4js.connectLogger also supports a nolog option where you can specify a string, regexp, or array to omit certain log messages. Example of 1.2 below.
app.use(log4js.connectLogger(logger, { level: 'auto', format: ':method :url', nolog: '\\.gif|\\.jpg$' }));
nolog value | Will Not Log | Will Log |
---|---|---|
"\\.gif" |
http://example.com/hoge.gif http://example.com/hoge.gif?fuga | http://example.com/hoge.agif |
"\\.gif\|\\.jpg$" |
http://example.com/hoge.gif http://example.com/hoge.gif?fuga http://example.com/hoge.jpg?fuga | http://example.com/hoge.agif http://example.com/hoge.ajpg http://example.com/hoge.jpg?hoge |
"\\.(gif\|jpe?g\|png)$" |
http://example.com/hoge.gif http://example.com/hoge.jpeg | http://example.com/hoge.gif?uid=2 http://example.com/hoge.jpg?pid=3 |
/\.(gif\|jpe?g\|png)$/ |
as above | as above |
["\\.jpg$", "\\.png", "\\.gif"] |
same as "\\.jpg\|\\.png\|\\.gif" |
same as "\\.jpg\|\\.png\|\\.gif" |