logger feature

.env.dist

@@ -6,4 +6,5 @@ APP_PORT=3000
 NODE_ENV=production
 REDIS_URL=redis://db
 CRYPTLEX_API_BASE_URL=https://api.cryptlex.com
-CRYPTLEX_API_ACCESS_TOKEN=
+CRYPTLEX_API_ACCESS_TOKEN=
+LOGS_DIR=logs

.gitignore

@@ -1,3 +1,4 @@
 /node_modules/
 /data/dump.rdb
-.env
+.env
+/logs/*.log

index.js

@@ -20,7 +20,7 @@ const redisClient = new RedisPromise(redis.createClient(process.env.REDIS_URL));
 const redlock = new Redlock([redisClient.originalClient]);
 const doClient = new DigitalOcean(process.env.DO_API_TOKEN);
 
-
+const logger = require('./logger');
 
 const clientAuthChecker = authChecker(
     async (token) => await isValidLicenseId(token)
@@ -251,6 +251,7 @@ router.post('/get-license-id', wrap(async(req, res) => {
         const licenseId = await getLicenseIdByLicenseKey(licenseKey);
         res.json({success: true, licenseId});
     } catch (err) {
+        logger.error('get license id endpoint', err);
         res.json({success: false, message: 'an error occured during license key checking'});
     }
 

logger.js

@@ -0,0 +1,30 @@
+
+const {createLogger, format, transports} = require('winston');
+
+const {NODE_ENV, LOGS_DIR} = process.env;
+
+function getLogPath(fileName) {
+    if (LOGS_DIR.length === 0) {
+        return fileName;
+    }
+
+    return LOGS_DIR + (/\/$/.test(LOGS_DIR) ? '' : '/') + fileName;
+}
+
+const logger = createLogger({
+    level: 'info',
+    format: format.json(),
+    defaultMeta: {service: 'subdomain-provider-api'},
+    transports: [
+        new transports.File({filename: getLogPath('error.log'), level: 'error'}),
+        new transports.File({filename: getLogPath('combined.log')})
+    ]
+});
+
+if (NODE_ENV !== 'production') {
+    logger.add(new transports.Console({
+        format: format.simple()
+    }))
+}
+
+module.exports = logger

package.json

@@ -18,6 +18,7 @@
     "ip-num": "^1.3.1",
     "redis": "^3.0.2",
     "redlock": "^4.2.0",
-    "uuid": "^8.3.2"
+    "uuid": "^8.3.2",
+    "winston": "^3.3.3"
   }
 }