Add unified logger output and file logging.

.gitignore

@@ -2,6 +2,7 @@
 node_modules/
 npm-debug.log
 public/*
+log*.txt
 
 # OS X
 .DS_Store

config.js

@@ -26,6 +26,8 @@ module.exports = {
     databaseURL: 'mongodb://localhost:27017/',
     port: 4000,
     secret: 'longsecretislong',
+    logLevel: 'info',
+    logFile: 'log.txt',
     admin: {
       username: 'admin',
       password: 'admin'
@@ -36,6 +38,8 @@ module.exports = {
     databaseURL: 'mongodb://database:27017/',
     port: 4000,
     secret: 'longsecretislong',
+    logLevel: 'warn',
+    logFile: 'villasweb-backend_log.txt',
     admin: {
       username: 'admin',
       password: 'admin'

package.json

@@ -8,9 +8,10 @@
     "body-parser": "^1.15.2",
     "cors": "^2.7.1",
     "express": "^4.14.0",
+    "express-winston": "^2.4.0",
     "formidable": "^1.0.17",
     "jsonwebtoken": "^7.0.1",
     "mongoose": "^4.5.1",
-    "morgan": "^1.7.0"
+    "winston": "^2.3.1"
   }
 }

server.js

@@ -23,10 +23,12 @@
 var express = require('express');
 var mongoose = require('mongoose');
 var bodyParser = require('body-parser');
-var morgan = require('morgan');
 var cors = require('cors');
+var winston = require('winston');
+var expressWinston = require('express-winston');
 
 // local include
+var logger = require('./utils/logger');
 var users = require('./routes/users');
 var projects = require('./routes/projects');
 var visualizations = require('./routes/visualizations');
@@ -45,10 +47,20 @@ var app = express();
 // load configuration
 var config = require('./config')[app.get('env')];
 
+// configure logger
+if (config.logLevel) {
+  logger.transports.console.level = config.logLevel;
+}
+
+if (config.logFile) {
+  logger.transports.file.filename = config.logFile;
+  logger.transports.file.silent = false;
+}
+
 // configure app
+app.use(expressWinston.logger({ winstonInstance: logger }));
 app.use(bodyParser.json());
 app.use(bodyParser.urlencoded({ extended: true }));
-app.use(morgan('dev'));
 app.use(cors());
 
 // connect to database
@@ -75,7 +87,7 @@ app.use(function(req, res, next) {
 });
 
 // development error handler
-console.log("Environment: " + app.get('env'));
+logger.info("Environment: " + app.get('env'));
 
 if (app.get('env') === 'development') {
   app.use(function(err, req, res, next) {
@@ -92,7 +104,7 @@ app.use(function(err, req, res, next) {
 
 // start the app
 app.listen(config.port, function() {
-  console.log('Express server listening on port ' + config.port);
+  logger.info('Express server listening on port ' + config.port);
 });
 
 // add admin account
@@ -100,7 +112,7 @@ if (config.admin) {
   // check if admin account exists
   User.findOne({ username: config.admin.username }, function(err, user) {
     if (err) {
-      console.log(err);
+      logger.error(err);
       return;
     }
 
@@ -109,11 +121,11 @@ if (config.admin) {
       var newUser = User({ username: config.admin.username, password: config.admin.password, role: 'admin' });
       newUser.save(function(err) {
         if (err) {
-          console.log(err);
+          logger.error(err);
           return;
         }
 
-        console.log('Created default admin user from config file');
+        logger.warn('Created default admin user from config file');
       });
     }
   });

utils/logger.js

+/**
+ * File: logger.js
+ * Author: Markus Grigull <mgrigull@eonerc.rwth-aachen.de>
+ * Date: 24.05.2017
+ *
+ * This file is part of VILLASweb-backend.
+ *
+ * VILLASweb-backend is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * VILLASweb-backend 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 General Public License
+ * along with VILLASweb-backend. If not, see <http://www.gnu.org/licenses/>.
+ ******************************************************************************/
+
+// include modules
+var winston = require('winston');
+
+const logger = new winston.Logger({
+  transports: [
+    new winston.transports.Console({
+      prettyPrint: false,
+      colorize: true,
+      timestamp: function() {
+        return new Intl.DateTimeFormat('de-DE', {
+          hour12: false,
+          year: 'numeric',
+          month: '2-digit',
+          day: '2-digit',
+          hour: '2-digit',
+          minute: '2-digit',
+          second: '2-digit'
+        }).format(Date.now());
+      }
+    }),
+    new winston.transports.File({
+      filename: 'log.txt',
+      tailable: true,
+      maxsize: 32768,
+      maxFiles: 32,
+      json: false,
+      silent: true,
+      timestamp: function() {
+        return new Intl.DateTimeFormat('de-DE', {
+          hour12: false,
+          year: 'numeric',
+          month: '2-digit',
+          day: '2-digit',
+          hour: '2-digit',
+          minute: '2-digit',
+          second: '2-digit'
+        }).format(Date.now());
+      }
+    })
+  ]
+});
+
+module.exports = logger;