index: added response logging

lib/index.js

@@ -1,5 +1,6 @@
 'use strict';
 
+var Writable = require('stream').Writable;
 var bodyParser = require('body-parser');
 var BaseService = require('./service');
 var inherits = require('util').inherits;
@@ -10,6 +11,7 @@ var StatusController = require('./status');
 var MessagesController = require('./messages');
 var UtilsController = require('./utils');
 var CurrencyController = require('./currency');
+var morgan = require('morgan');
 var bitcore = require('bitcore-lib');
 var _ = bitcore.deps._;
 var $ = bitcore.util.preconditions;
@@ -85,8 +87,30 @@ InsightAPI.prototype.start = function(callback) {
   setImmediate(callback);
 };
 
+InsightAPI.prototype.createLogInfoStream = function() {
+  var self = this;
+
+  function Log(options) {
+    Writable.call(this, options);
+  }
+  inherits(Log, Writable);
+
+  Log.prototype._write = function (chunk, enc, callback) {
+    self.node.log.info(chunk.slice(0, chunk.length - 1)); // remove new line and pass to logger
+    callback();
+  };
+  var stream = new Log();
+
+  return stream;
+};
+
 InsightAPI.prototype.setupRoutes = function(app) {
 
+  //Setup logging
+  var logFormat = ':remote-addr ":method :url" :status :res[content-length] :response-time ":user-agent" ';
+  var logStream = this.createLogInfoStream();
+  app.use(morgan(logFormat, {stream: logStream}));
+
   app.use(bodyParser.urlencoded({extended: true}));
 
   //Enable CORS

package.json

@@ -66,6 +66,7 @@
     "body-parser": "^1.13.3",
     "lodash": "^2.4.1",
     "lru-cache": "^4.0.1",
+    "morgan": "^1.7.0",
     "request": "^2.64.0"
   },
   "devDependencies": {