File download phoenix elixir

Waffle is a flexible file upload library for Elixir with straightforward integrations for Amazon S3 and ImageMagick. This library is forked from Arc and works much in the same way. To illustrate how to upload files we will start with a simple demo application, which let us upload pictures to local storage and viewing pictures on page. We will also use Waffle.

Ecto library to integrate Waffle with Ecto and save file data in the database. At the end, we will check how to upload files to S3 server. Let's take a few shortcuts and create everything that we need with one command in the project folder:. The above command mix phx.

We will have a table named "photos" in the database with id, picture for storing data about the file and timestamps columns. We also need to provide an appropriate route for our new controller in router.

You can run mix phx. In the next chapter, we are going to add Waffle and Waffle. When we install Elixir using instructions from the Elixir Installation Page , we will usually get Erlang too.

If Erlang was not installed along with Elixir, please see the Erlang Instructions section of the Elixir Installation Page for instructions. The phx. The flags mentioned below are command line options to the generator; see all available options by calling mix help phx. PostgreSQL is a relational database server. In order to talk to databases, Phoenix applications use another Elixir package, called Ecto. If you don't plan to use databases in your application, you can pass the --no-ecto flag.

Find centralized, trusted content and collaborate around the technologies you use most. Connect and share knowledge within a single location that is structured and easy to search. I however want to find a way where users of my application can download or save these uploaded files by just clicking on a download button on the browser. The downloaded files will be in a separate folder. Stack Overflow for Teams — Collaborate and share knowledge with a private group.

Create a free Team What is Teams? Collectives on Stack Overflow. Learn more. How to download or save files locally in Phoenix Ask Question. Asked 3 years, 7 months ago. If it is your first time with Phoenix, you don't need to worry about the details right now. For now, suffice it to say our application starts a database repository, a PubSub system for sharing messages across processes and nodes, and the application endpoint, which effectively serves HTTP requests.

These services are started in the order they are defined and, whenever shutting down your application, they are stopped in the reverse order. You can learn more about applications in Elixir's official docs for Application. Mailer module, which defines the main interface to deliver e-mails:. It defines a Hello.

Repo module which is our main interface to the database. If you are using Postgres the default database , you will see something like this:. And that's it for now. As you work on your project, we will add files and modules to this directory. It looks like this when expanded:. All of the files which are currently in the controllers , templates , and views directories are there to create the "Welcome to Phoenix! By looking at templates and views directories, we can see Phoenix provides features for handling layouts and error pages out of the box.