Authentication for file uploads in Angular 2 using Dropzone and passportjs

I am currently working on implementing authentication for an admin user using Express, Passport, and MySQL in a specific page. The authentication process works fine, but I am facing an issue with verifying whether the user is logged in while uploading files on the admin page within an Angular 2 app.

Below is the server-side code snippet:

const express       = require('express');
// Other required modules...

// Middleware to check if the user is logged in
isLoggedIn = (req, res, next) => {
    // Check if the user is authenticated
};

// MySQL connection configuration...
// Passport setup...

var image = new I();
var app = express();

// App middleware setup...

app.listen(8080);

I believe that I need to include header information containing the session ID or cookie data when making uploads through Dropzone in order to authenticate the user. However, I am unsure about the exact implementation of this approach.

On the client-side in Angular 2:

// Import statements...

@Component({
  selector: 'app-root',
  templateUrl: './app.component.html',
  styleUrls: ['./app.component.scss']
})
export class AppComponent implements AfterContentInit {

    constructor(private image: ImageService, private http: Http) {}

    ngAfterContentInit(): void {
        // Initialize Dropzone instance...
        
        this.dropzone.on('success', (file, res) => {
             console.log(res.filename);
        });
    }
}

Answer №1

I stumbled upon a solution here. Essentially, the issue was resolved by including the passport-generated cookie. This can be achieved by activating the withCredentials option.

Dropzone

this.dropzone = new Dropzone('form#dropzone', {
            url: "http://localhost:8080/upload-image",
            parallelUploads: 5,
            autoProccessQueue: true,
            acceptedFiles: "image/*",
            withCredentials: true  //    <<-----
        });

Angular 2

let head = new Headers({ 'Content-Type': 'application/json' });
        let options = new RequestOptions({ headers: head, method: "post", withCredentials: true});

Enabling the withCredentials setting to true allows for authentication of the individual request.

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