Router and Express Router

Question 1

HTTP Request/Response Cycle

Answer 1

1. browser parses the URL, looking for the domain name
2. browser sends query with the domain name to the ISP(internet service provider)
3. The ISP looks up domain in DNS (domain name system) and matches it to an IP (internet protocol) address
4. ISP sends IP address back to the browser-response-all items collected to be parsed by the browser

Question 2

URL

Answer 2

Uniform resource locator
Consists of:
1. protocol (http, https, ftp)
2. domain (mapped to IP address
3. port
4.path
5.query string

Question 3

Web server role

Answer 3

parse URLs

Question 4

Describe the architecture of a basic Express app. How is it organized?

Answer 4

-architecture that allows for middleware?
-framework made up of 4 pieces:
1. express()
2. application
3. request
4. response
5. router
architecture:
data- database and schema
services available to route
API layer and routes

Question 5

Express

Answer 5

1. minimalist framework

2. designed to allow anyone to contribute functionality

Question 6

express()

Answer 6

• The top-level function exported by the Express module. – when called it:
  1. creates an Express app
  2. gives us access to the other Express objects (application, request, response, router)

Question 7

(express) application

Answer 7

1. object
2. it is theExpress application itself
3. provides methods to route HTTP requests
4. provides methods to configure middleware
5. provides other functionality relevant to constructing web applications

Question 8

request

Answer 8

1. Object that represents the HTTP request
2. has properties to access the various features of the request such as query string, headers and so on.
3. referred to as req
4. passed to route handling methods

Question 9

response

Answer 9

1. Object that represents the HTTP response that is sent to the client when the request is completed.
2. referred to as res
3. passed to route handling methods.
4. contains methods to format the response, set the response headers and status code.

Question 10

router

Answer 10

1. mini- application

2. used to make apps more modular

Question 11

Tell me about a time when you’ve used Express Router. How was it helpful?

Answer 11

Express router:
a time I’ve used it- capstone!
super helpful in breaking up and organizing the different routes- much more manageable to work with the code

Question 12

unit testing

Answer 12

testing individual components

NEED EXAMPLE

Question 13

integration testing

Answer 13

how components behave when working with other components
uncover errors at the interface between components or communication between components
like testing the interactions of the router and the database and services

Question 14

interface

Answer 14

refers to the shared boundary across which components exchange data

Question 15

mocha

Answer 15

testing framework

Question 16

chai

Answer 16

assertion library

Question 17

supertest

Answer 17

a tool for testing HTTP calls