add logger

Author: michaelliao

samples/node/web/log/winston/.vscode/launch.json

@@ -0,0 +1,25 @@
+{
+    "version": "0.2.0",
+    "configurations": [
+        {
+            "name": "Start",
+            "type": "node",
+            "request": "launch",
+            "program": "${workspaceRoot}/app.js",
+            "stopOnEntry": false,
+            "args": [],
+            "cwd": "${workspaceRoot}",
+            "preLaunchTask": null,
+            "runtimeExecutable": null,
+            "runtimeArgs": [
+                "--nolazy", "--use_strict"
+            ],
+            "env": {
+                "NODE_ENV": "development"
+            },
+            "externalConsole": false,
+            "sourceMaps": false,
+            "outDir": null
+        }
+    ]
+}

samples/node/web/log/winston/app.js

@@ -0,0 +1,9 @@
+const logger = require('./logger.js');
+
+logger.info('start app...');
+try {
+    throw new Error('APP ERROR!');
+} catch (e) {
+    logger.error('error', e);
+}
+logger.info('app ended.');

samples/node/web/log/winston/logger.js

@@ -0,0 +1,28 @@
+const winston = require('winston');
+
+var logger = new winston.Logger({
+    transports: [
+        new winston.transports.Console({
+            name: 'console',
+            colorize: true,
+            level: 'info',
+            timestamp: true
+        }),
+        new winston.transports.File({
+            name: 'info-file',
+            filename: __dirname + '/info.log',
+            level: 'info',
+        }),
+        new winston.transports.File({
+            name: 'error-file',
+            filename: __dirname + '/error.log',
+            level: 'error',
+            json: false,
+            timestamp: function () {
+                return new Date().toTimeString();
+            }
+        })
+    ]
+});
+
+module.exports = logger;

samples/node/web/log/winston/package.json

@@ -0,0 +1,22 @@
+{
+    "name": "logger",
+    "version": "1.0.0",
+    "description": "Log example",
+    "main": "app.js",
+    "scripts": {
+        "start": "node app.js"
+    },
+    "keywords": [
+        "log",
+        "winston"
+    ],
+    "author": "Michael Liao",
+    "license": "Apache-2.0",
+    "repository": {
+        "type": "git",
+        "url": "https://github.com/michaelliao/learn-javascript.git"
+    },
+    "dependencies": {
+        "winston": "2.3.1"
+    }
+}