we use morgan
in order to log our express transformation:
var morgan = require('morgan');
morgan('combined');
// a format string
morgan(':remote-addr :method :url :uuid');
// a custom function
morgan(function (req, res) {
return req.method + ' ' + req.url + ' ' + req.uuid;
})
Also, we use winston
in order to log our other logging:
var winston = require('winston');
var logger = new (winston.Logger)({
transports: [
new (winston.transports.Console)({ level: 'info' }),
new (winston.transports.File)({ filename: '/var/log/log-file.log' })
]
});
Is there any way to combine the two loggers together? the situation now is that morgan
is write to my standard output, when winston
writes to /var/log/log-file.log
.
I wish that the logger file will combine from the express transformation information, and from the other information I want (logger.info()
)..
This article does an excellent job for what you want to do.
http://tostring.it/2014/06/23/advanced-logging-with-nodejs/
For your specific code you probably need something like this:
var logger = new winston.Logger({
transports: [
new winston.transports.File({
level: 'info',
filename: './logs/all-logs.log',
handleExceptions: true,
json: true,
maxsize: 5242880, //5MB
maxFiles: 5,
colorize: false
}),
new winston.transports.Console({
level: 'debug',
handleExceptions: true,
json: false,
colorize: true
})
],
exitOnError: false
});
logger.stream = {
write: function(message, encoding){
logger.info(message);
}
};
app.use(require("morgan")("combined", { "stream": logger.stream }));
This will set up Winston to write a log to the console as well as a file. Then you can use the last expression to pass output from the morgan middleware into winston.