Building Enterprise JavaScript Applications

Using body-parser middleware

That's just the start of our Express journey. The power of Express is in its abundance of middleware, which are functions that every request passes through. These middleware functions can opt to modify the request object before it arrives at the handler.

Therefore, instead of working with streams and buffers to obtain our payload data, we can make use of a very popular middleware package, body-parser. body-parser provides the ability to parse request bodies into JavaScript objects, which can then be consumed by our handlers. It does this in an efficient and optimized way, and also provides safeguards to ensure the payload is not too large. So, let's install it:

$ yarn add body-parser

Then, add the following lines ...