node.js-日志记录/使用morgan和winston

Question

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;
})

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' })
  ]
});

Answer 1

这篇文章对你想做的事情做得很好。

http://tostring.it/2014/06/23/advanced-logging-with-nodejs/

对于特定的代码，您可能需要以下内容：

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 }));