title: AWS: Reading all files in an Amazon S3 bucket with a lambda function
body: <p>I have an Amazon S3bucket with a trigger to run a lambda function that has access to the bucket. I want to make a function (with Node.js) that reads all the files' content and sums up digits found in it.
  I couldn't find with google how to read files from an Amazon S3 bucket with a lambda function in Node.js.</p>
  <p>Can you explain to me - what libraries do I need? Which functions in those libraries can be useful to me? Thanks in advance :) Oren</p>