81 lines
2.6 KiB
Elixir
81 lines
2.6 KiB
Elixir
# Pleroma: A lightweight social networking server
|
|
# Copyright © 2017-2019 Pleroma Authors <https://pleroma.social/>
|
|
# SPDX-License-Identifier: AGPL-3.0-only
|
|
|
|
defmodule Pleroma.Uploaders.Uploader do
|
|
import Pleroma.Web.Gettext
|
|
|
|
@moduledoc """
|
|
Defines the contract to put and get an uploaded file to any backend.
|
|
"""
|
|
|
|
@doc """
|
|
Instructs how to get the file from the backend.
|
|
|
|
Used by `Pleroma.Plugs.UploadedMedia`.
|
|
"""
|
|
@type get_method :: {:static_dir, directory :: String.t()} | {:url, url :: String.t()}
|
|
@callback get_file(file :: String.t()) :: {:ok, get_method()}
|
|
|
|
@doc """
|
|
Put a file to the backend.
|
|
|
|
Returns:
|
|
|
|
* `:ok` which assumes `{:ok, upload.path}`
|
|
* `{:ok, spec}` where spec is:
|
|
* `{:file, filename :: String.t}` to handle reads with `get_file/1` (recommended)
|
|
|
|
This allows to correctly proxy or redirect requests to the backend, while allowing to migrate backends without breaking any URL.
|
|
* `{url, url :: String.t}` to bypass `get_file/2` and use the `url` directly in the activity.
|
|
* `{:error, String.t}` error information if the file failed to be saved to the backend.
|
|
* `:wait_callback` will wait for an http post request at `/api/pleroma/upload_callback/:upload_path` and call the uploader's `http_callback/3` method.
|
|
|
|
"""
|
|
@type file_spec :: {:file | :url, String.t()}
|
|
@callback put_file(Pleroma.Upload.t()) ::
|
|
:ok | {:ok, file_spec()} | {:error, String.t()} | :wait_callback
|
|
|
|
@callback http_callback(Plug.Conn.t(), Map.t()) ::
|
|
{:ok, Plug.Conn.t()}
|
|
| {:ok, Plug.Conn.t(), file_spec()}
|
|
| {:error, Plug.Conn.t(), String.t()}
|
|
@optional_callbacks http_callback: 2
|
|
|
|
@spec put_file(module(), Pleroma.Upload.t()) :: {:ok, file_spec()} | {:error, String.t()}
|
|
|
|
def put_file(uploader, upload) do
|
|
case uploader.put_file(upload) do
|
|
:ok -> {:ok, {:file, upload.path}}
|
|
:wait_callback -> handle_callback(uploader, upload)
|
|
{:ok, _} = ok -> ok
|
|
{:error, _} = error -> error
|
|
end
|
|
end
|
|
|
|
defp handle_callback(uploader, upload) do
|
|
:global.register_name({__MODULE__, upload.path}, self())
|
|
|
|
receive do
|
|
{__MODULE__, pid, conn, params} ->
|
|
case uploader.http_callback(conn, params) do
|
|
{:ok, conn, ok} ->
|
|
send(pid, {__MODULE__, conn})
|
|
{:ok, ok}
|
|
|
|
{:error, conn, error} ->
|
|
send(pid, {__MODULE__, conn})
|
|
{:error, error}
|
|
end
|
|
after
|
|
callback_timeout() -> {:error, dgettext("errors", "Uploader callback timeout")}
|
|
end
|
|
end
|
|
|
|
defp callback_timeout do
|
|
case Mix.env() do
|
|
:test -> 1_000
|
|
_ -> 30_000
|
|
end
|
|
end
|
|
end
|