Read 08 ~ Express Routing & Connected API
By Abdallah obaid
| NAME | URL |
|---|---|
| Home | Home. |
| Prep | Prep: Engineering Topics. |
| Read 01 | Node Ecosystem, TDD, CI/CD. |
| Read 02 | Classes, Inheritance, Functional. |
| Read 03 | Data Modeling & NoSQL Databases. |
| Read 04 | Advanced Mongo/Mongoose. |
| Read 05 | Linked Lists. |
| Read 06 | HTTP and REST. |
| Read 07 | Express. |
| Read 08 | Express Routing & Connected API. |
| Read 09 | API Server. |
| Read 10 | Stacks and Queues. |
| Read 11 | Authentication. |
| Read 12 | OAuth. |
| Read 13 | Bearer Authorization. |
| Read 14 | Access Control (ACL). |
| Read 15 | Trees. |
| Read 16 | Event Driven Applications. |
Express Routing & Connected API:-
## Router:
- Router It is a mini express application without all the bells and whistles of an express application, just the routing stuff.
- The Router allowed us to make our applications more modular and flexible than ever before by creating multiple instances of the Router and applying them accordingly.
- Using
express.Router()multiple times allow us to define groups of routes - We can use route middleware to validate parameters using .param()
## Middleware:
- Any functions that invoked by Express.js routing layer before your final request handler is made.
- Have access to the request object ( req ), the response object ( res ), and the next function in the application’s request-response cycle.
- Middleware is a way to do something before a request is processed.
- The order you place your middleware and routes is very important. Everything will happen in the order that they appear. ## Modularizing :
- Modularizing ensures that external functionality is created in such a way that it isn’t dependent on other external functionality, a concept known as loose coupling.
