Reading static files at runtime

Phoenix Forum Questions / Help
1

Hello, I am trying to load a file at runtime that errors out as could not read file "my_app/priv/private.pem": no such file or directory the first time. However, if I refresh the page, it works perfectly fine. I assume this is because it did not have a chance to load the first time around. What can I do to make sure it works perfectly the first time around?

2

Can you share some code how you are accessing the file?

1 Like
3

You will need to use something like Path.join(:code.priv_dir(:my_app), "private.pem") to get the actual path to the priv dir in a compiled app/release

3 Likes
4

Application.app_dir(:my_app, "priv/private.pem") does the same with a tad less complexity.

5 Likes
5

Thanks this works locally in dev, and in prod as well. I had to read a PDF to send as an email attachment.

|> attachment(
  Swoosh.Attachment.new(
    {:data,
     File.read!(
       Application.app_dir(:my_app, "priv/static/planners/#{dominant_personality}.pdf")
     )},
    filename: "#{dominant_personality}.pdf",
    content_type: "application/pdf",
    type: :attachment
  )
)