📚 Tutorial🕸️ Express JsBasic - Static

Static File

Folder Structure

Let’s assume you have a folder like this

.
├── server.ts
├── package.json
├── tsconfig.json
├── 📂uploads
│   ├── 📂cars
│   │   ├──coolCars.jpeg 
│   │   ├──  📂moreCarFolder
│   │   │     └── cuteCar.jpeg 
│   │   └── adorableBMW.gif
│   ├── yolo.jpeg 
│   ├── hello.html 
│   └── 📂mouse
│        └── music.mp3 
└── 📂public
    ├── index.js
    ├── index.html
    └── index.css

express.static() Usage

The express.static() can help to feed static file / folder without using res.send().

server.ts
import express from "express";
import { Request, Response } from "express";
 
const app = express();
 
app.get("/api", function (req: Request, res: Response) {
    res.end("Hello mom!");
});
 
// highlight-start
// Add this line
app.use(express.static("public"));
app.use('/uploads', express.static("uploads"))
// highlight-end
 
const PORT = 8080;
 
app.listen(PORT, () => {
  console.log(`Listening at http://localhost:${PORT}/`);
});

To get the specific file, you may follow the regarind pattens.

app.use(express.static("public"));
app.use('/uploads', express.static("uploads"))
 
index.html
http://localhost:8080/
 
yolo.jpeg
http://localhost:8080/uploads/yolo.jpeg
 
music.mp3
http://localhost:8080/uploads/mouse/music.mp3 
 
adorableBMW.gif
http://localhost:8080/uploads/cars/adorableBMW.gif
 
cuteCar.jpeg
http://localhost:8080/uploads/cars/moreCarFolder/cuteCar.jpeg

With __dirname

// Normal ways
app.use(express.static("public")); // Defaulf is "/" path
app.use('/uploads', express.static("uploads"))
 
 
// Safe ways
import path from "path"
 
let uploadDir = path.join(__dirname, 'uploads')
app.use('/uploads', express.static(uploadDir))

With middleware guard

import path from "path"
import { Request, Response, NextFunction } from 'express';
 
app.use(
    "/upload",
    isValidUserGuard,
    express.static(path.join(__dirname, "..", '/upload'))
);
 
export function isValidUserGuard(
    req: Request,
    res: Response,
    next: NextFunction
) {
    try {
 
        // Check the cookie or header that match your requirement
        if(req.cookies){
            return next();
        }
 
        throw new Error("Invalid access")
    }
    catch (error) {
        return res.status(501).json({
            status: false,
            msg: "Permission Denied."
        });
    }
}
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