sezaru
Customize AshJsonApi route to return raw binary
I have an API route with AshJsonApi that generates an image that needs to be sent back to the user.
I wanted to know if there is some way to customize an route so I can change the return type from “application/json” to “image/png” and send the binary directly in the body.
I know I can achieve something similar by creating a base64 of the image binary or storing it somewhere and return an url, but I would prefer to send the raw binary back if possible.
Here is my action:
action :render, :binary do
run fn _, _ ->
some_binary = <<>>
{:ok, some_binary}
end
end
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sezaru
Update:
So, I added this to my route to change the conn:
route :post, "render", :render do
modify_conn fn conn, subject, result, request ->
conn
|> Plug.Conn.put_resp_content_type("image/png")
|> Plug.Conn.send_resp(200, <<213>>)
end
end
This will “work”, it sends the response the way I want.. But, right after the modify_conn, ash json api will call its own controller (ash_json_api/controllers/response.ex) and try to send the json value too, giving the [error] ** (Plug.Conn.AlreadySentError) the response was already sent error since I already sent the response before.
So I guess there is no scapegoat right now to achieve that?
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