CLASS TWO NOTES

code 102 notes

what is node dot js?
- lets us run JS outside of a browser
- i.e. a “runtime”
what is require?
- function which allows us to use a library (i.e. node library)
- gives the runtime with an object to use
what is a node module?
- a file / group of files in Node
- a program that is exported to be used elsewhere
what is express used for?
- URL pathways => HTTP Requests
- allows for RESTful web service design
what is a Request?
- something sent to a server
- in express how do we interface with this Request?
  - Get, Post, Delete, Put
what is a Response?
- the thing the server sends back
what is middleware?
- any program that runs in between two other programs
what is middleware in the express context?
- function that runs in between the request and the response
  - Next function passes the baton to the next program
  - Optional error parameter to handle errors

What’s the difference between PUT and PATCH?
- a put request replaces the resource with a modified copy
- a patch request is a set of instructions to modify the resource itself
Provide links to 3 services or tools that allow you to “mock” an API for development like json-server
- Postman
- Swagger
- Mocki
Compare and contrast Swagger and APIDoc.js
- Which HTTP status codes should be sent with each type of (un)successful API call?
- 200 codes are successful
- 400 codes are error codes indicating the client has done something wrong
- 500 codes are error codes indicating the server has done something wrong
Compare and contrast SOAP and ReST
- Simple Object Access Protocol
- is a protocol - Representational State Transfer
- is not a protocol