Standard logger middleware for loopback

package.json

@@ -39,6 +39,7 @@
     "bcryptjs": "^2.1.0",
     "bluebird": "^3.1.1",
     "body-parser": "^1.12.0",
+    "bunyan": "^1.8.1",
     "canonical-json": "0.0.4",
     "continuation-local-storage": "^3.1.3",
     "debug": "^2.1.2",

server/middleware/logger.js

@@ -0,0 +1,55 @@
+// Copyright IBM Corp. 2014,2015. All Rights Reserved.
+// Node module: loopback
+// This file is licensed under the MIT License.
+// License text available at https://opensource.org/licenses/MIT
+
+var bunyan = require('bunyan');
+var loopback = require('../../lib/loopback');
+var util = require('util');
+
+module.exports = logger;
+
+function logger(options) {
+  //console.log('typeof this mdidleware', this.get('restApiRoot'));
+  console.log('log-middleware options: ', options);
+  var defaultOptions = {
+    name: 'Loopback',
+    // decides what to log
+    log: {
+      request: true,
+    },
+    streams: [],
+  };
+  var options = util._extend(defaultOptions, options);
+  var logger = bunyan.createLogger({name: 'app'});
+
+
+  return function(req, res, next) {
+    var app = req.app;
+
+    // use singleton instance of logger?
+    if (!app.get('logger')) {
+      app.set('logger', logger);
+    }
+
+    if (options.log.request) {
+      bindMethod(req, res, logRequest);
+    }
+
+    next();
+  };
+
+  function bindMethod(req, res, method) {
+    res.on('finish', function() { method(req, res); });
+  }
+
+  function logRequest(req, res) {
+    var data = {
+      action: options.log.request.action || 'request',
+      verb: req.method,
+      path: req.url,
+      statusCode: res.statusCode,
+    };
+    logger.info(data);
+  }
+};