File download JWT

IT Management. Project Management. Resources Blog Articles. Menu Help Create Join Login. Get project updates , sponsored content from our select partners, and more. Full Name. Phone Number. Job Title. Note that you could do without this, in which case you could simply pass the getZip method as a click callback on the button.

Note that for the sake of simplicity, I use a button here, but this is a bad practice in terms of accessibility: you should always use a download link to download a file.

Here you could have a button to trigger the download, then display the link with the local URL as its href attribute. This ensures that you can show a loader to your user if isTheArchiveLoading is true. The finalize operator in the pipe on downloadZipFile is called when downloadZipFile resolves, much like the Promise. And here you go, you have a fully functional downloading method, with an authenticated route, called from your front-end!

Recently on a project of mine, I was presented with a problem: I needed to allow our users to download a ZIP archive of files from our back-end, based on complex authorisation rules, following a four-step process: The front-end would call the back-end with a list of file names to download.

The back-end would authenticate the user with their JWT token. It would then check if the user was allowed to retrieve those files. Questions: How to remove Angular template cache once user clicks on logout? We did thorough research and tried to implement most of the solutions available out there. Add menu. How to handle file downloads with JWT based authentication? Quoting Woloski: The way you solve this is by generating a signed request like AWS does, for example.

In simple terms, it is just an another way of encoding JSON object and use that encoded object as an access tokens for authentication from the server. This is the first part of the series of two short post regarding the practical application of JWT.

In most of the frontend applications, we need to download the files from the server but downloading the file is a tricky task. We will append this token along with the url of the current download click action and send the token to the server for authentication. This token will be verified by the middleware on the server as below:. This token will never be used again and prevent the user from opening the URL in the new tab without the access of the token.

Even though if someone copies the token from the network calls s he will never be able to use it because of 2 seconds expiry clause which we can reduce anyways.