Add debug

README.md

@@ -51,6 +51,24 @@ lambda function into a zip file.
 
 Please use the following [code style](https://github.com/airbnb/javascript) as much as possible.
 
+# Debugging
+
+To get a debug trace, set an Node.js environment variable called DEBUG and
+specify the JavaScript module/s to debug.
+
+E.g.
+
+```
+export DEBUG=*
+export DEBUG=index
+```
+
+Or set an environment variable called "DEBUG" in your AWS stack (using the AWS 
+console) for the "alertlogic-cwe-collector" AWS Lambda function, with 
+value "index" or "*".
+
+See [debug](https://www.npmjs.com/package/debug) for further details.
+
 # Known Issues/ Open Questions
 
 - TBD.

index.js

@@ -9,6 +9,7 @@
  * -----------------------------------------------------------------------------
  */
 
+const debug = require('debug') ('index'); 
 const https = require('https');
 const util = require('util');
 const AWS = require('aws-sdk');
@@ -19,6 +20,7 @@ const m_alServiceC = require('./lib/al_servicec');
 const m_alAws = require('./lib/al_aws');
 const m_checkin = require('./checkin');
 const m_packageJson = require('./package.json');
+const m_alUtil = require('./lib/al_util');
 
 const response = require('cfn-response');
 
@@ -305,6 +307,7 @@ function getStatistics(context, event, finalCallback) {
 
 
 exports.handler = function(event, context) {
+    debug("DEBUG0001: Received event: ", JSON.stringify(event));
     switch (event.RequestType) {
         case 'ScheduledEvent':
             return processScheduledEvent(event, context);

package.json

@@ -22,6 +22,7 @@
     "sinon": "^3.3.0"
   },
   "dependencies": {
+    "debug": "*",
     "async": "*",
     "cfn-response": "*",
     "moment": "^2.19.2",