Switch to Backend 2023 | Day 1 Part 2
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This session will provide attendees with hands-on experience and in-depth knowledge of using Node.js as a runtime environment and Express.js as a web framework to build scalable and fast backend systems. Additionally, attendees will learn about Passport.js, a popular authentication middleware for Node.js, and how to use Prisma ORM to handle database operations in a type-safe and efficient manner. The session will be conducted by experienced developers who have worked with these technologies and will be able to provide valuable insights and best practices. The session will be interactive and include plenty of opportunities for attendees to ask questions and work on real-world projects.
![import fetch from 'node-fetch';
app.get("/post/rand", (req, res)=>{
const response = await fetch('https://dummyjson.com/posts');
const posts = await response.json();
const rand = Math.random() * posts.length;
for (let i = posts.length - 1; i > 0; i--) {
const j = Math.floor(Math.random() * (i + 1));
const temp = posts[i];
posts[i] = posts[j];
posts[j] = temp;
}
const randomPosts = posts.subarray(0, rand);
return res.json({posts: randomPosts);
});](https://image.slidesharecdn.com/day1part2-230212173530-9f7c9c14/85/Switch-to-Backend-2023-Day-1-Part-2-8-320.jpg)
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Switch to Backend 2023 | Day 1 Part 2
- 1. Express.JS
- 2. How does express help you? ● Less code ● Promotes a better project structure ● Widely used. Has lots of plugins
- 4. Your machine is the localhost Hostname: localhost IP Address: 127.0.0.1
- 7. import express from "express"; const app = express(); app.get("/", (req, res)=>{ return res.send("Home"); } app.listen(5000, ()=>{ console.log("Listening on PORT 5000"); }); Get the default export from the express package Create an Express application Set up your routes Set the server up to listen To HTTP requests
- 8. import fetch from 'node-fetch'; app.get("/post/rand", (req, res)=>{ const response = await fetch('https://dummyjson.com/posts'); const posts = await response.json(); const rand = Math.random() * posts.length; for (let i = posts.length - 1; i > 0; i--) { const j = Math.floor(Math.random() * (i + 1)); const temp = posts[i]; posts[i] = posts[j]; posts[j] = temp; } const randomPosts = posts.subarray(0, rand); return res.json({posts: randomPosts); });
- 9. . ├── src/ │ └── routers/ │ └── hello.js └── server.js Structure your code
- 11. Specificity Be more Specific As you go up app.get("/:hello/world", (_req, res)=>{ res.send('YO MAMA!'); }); app.get("/:hello/", (_req, res)=>{ res.send('SO!'); }); app.get("/", (_req, res)=>{ res.send('FAT!'); });
- 12. . ├── src/ │ ├── routers/ │ │ ├── hello.js │ │ ├── post.js │ │ └── index.js │ └── controllers/ │ ├── hello/ │ │ └── get.js │ ├── post/ │ │ ├── get.js │ │ └── post.js │ └── index.js └── server.js Structure your code Again!
- 13. Extras You don’t need them now, but you will
- 14. Middlewares Router Middleware 1 Middleware 2 {could be more} Controller
- 15. Cookies and Sessions ● Cookies are used to store data on the client side. Who am I speaking to? ● Sessions are used to store data on the server side.
- 16. Static Folder Direct access for clients.