commit e7389c8fdfd7eb03acbe8501211b38ebf0df711a Author: Claudio Maradonna Date: Thu Aug 18 17:26:45 2022 +0200 translated ipfs as module for Akkoma diff --git a/.gitignore b/.gitignore new file mode 100644 index 0000000..e69de29 diff --git a/LICENSE b/LICENSE new file mode 100644 index 0000000..be3f7b2 --- /dev/null +++ b/LICENSE @@ -0,0 +1,661 @@ + GNU AFFERO GENERAL PUBLIC LICENSE + Version 3, 19 November 2007 + + Copyright (C) 2007 Free Software Foundation, Inc. + Everyone is permitted to copy and distribute verbatim copies + of this license document, but changing it is not allowed. + + Preamble + + The GNU Affero General Public License is a free, copyleft license for +software and other kinds of works, specifically designed to ensure +cooperation with the community in the case of network server software. + + The licenses for most software and other practical works are designed +to take away your freedom to share and change the works. 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If not, see . + +Also add information on how to contact you by electronic and paper mail. + + If your software can interact with users remotely through a computer +network, you should also make sure that it provides a way for users to +get its source. For example, if your program is a web application, its +interface could display a "Source" link that leads users to an archive +of the code. There are many ways you could offer source, and different +solutions will be better for different programs; see section 13 for the +specific requirements. + + You should also get your employer (if you work as a programmer) or school, +if any, to sign a "copyright disclaimer" for the program, if necessary. +For more information on this, and how to apply and follow the GNU AGPL, see +. diff --git a/README.md b/README.md new file mode 100644 index 0000000..83950a1 --- /dev/null +++ b/README.md @@ -0,0 +1,31 @@ +# Akkoma module for IPFS as uploader + +## Important +This module replace the `upload.ex` file to implement the IPFS uploader, +this because Elixir doesn't implement Monkey Patching and without the +modified `upload.ex` Akkom won't return the right base url back. + +### Installation + +* Enter in the module folder of akkoma (defined in the `config.exs`) +* Clone this repo inside (only the .ex files will be loaded) + +### Cheatsheet + +* `post_gateway_url`: URL with port of POST Gateway (unauthenticated) +* `get_gateway_url`: URL of public GET Gateway + +### Example + +*config* + +```elixir +config :pleroma, :modules, runtime_dir: "instance/modules" + +config :pleroma, Pleroma.Uploaders.IPFS, + post_gateway_url: "http://localhost:5001", + get_gateway_url: "http://{CID}.ipfs.mydomain.com" + +config :pleroma, Pleroma.Upload, + uploader: Pleroma.Uploaders.IPFS +``` diff --git a/lib/pleroma/upload.ex b/lib/pleroma/upload.ex new file mode 100644 index 0000000..676f232 --- /dev/null +++ b/lib/pleroma/upload.ex @@ -0,0 +1,276 @@ +# Pleroma: A lightweight social networking server +# Copyright © 2017-2021 Pleroma Authors +# SPDX-License-Identifier: AGPL-3.0-only + +defmodule Pleroma.Upload do + @behaviour Pleroma.Upload + + @moduledoc """ + Manage user uploads + + Options: + * `:type`: presets for activity type (defaults to Document) and size limits from app configuration + * `:description`: upload alternative text + * `:base_url`: override base url + * `:uploader`: override uploader + * `:filters`: override filters + * `:size_limit`: override size limit + * `:activity_type`: override activity type + + The `%Pleroma.Upload{}` struct: all documented fields are meant to be overwritten in filters: + + * `:id` - the upload id. + * `:name` - the upload file name. + * `:path` - the upload path: set at first to `id/name` but can be changed. Keep in mind that the path + is once created permanent and changing it (especially in uploaders) is probably a bad idea! + * `:tempfile` - path to the temporary file. Prefer in-place changes on the file rather than changing the + path as the temporary file is also tracked by `Plug.Upload{}` and automatically deleted once the request is over. + * `:width` - width of the media in pixels + * `:height` - height of the media in pixels + * `:blurhash` - string hash of the image encoded with the blurhash algorithm (https://blurha.sh/) + + Related behaviors: + + * `Pleroma.Uploaders.Uploader` + * `Pleroma.Upload.Filter` + + """ + alias Ecto.UUID + alias Pleroma.Config + alias Pleroma.Maps + require Logger + + @type source :: + Plug.Upload.t() + | (data_uri_string :: String.t()) + | {:from_local, name :: String.t(), id :: String.t(), path :: String.t()} + | map() + + @type option :: + {:type, :avatar | :banner | :background} + | {:description, String.t()} + | {:activity_type, String.t()} + | {:size_limit, nil | non_neg_integer()} + | {:uploader, module()} + | {:filters, [module()]} + + @type t :: %__MODULE__{ + id: String.t(), + name: String.t(), + tempfile: String.t(), + content_type: String.t(), + width: integer(), + height: integer(), + blurhash: String.t(), + path: String.t() + } + defstruct [:id, :name, :tempfile, :content_type, :width, :height, :blurhash, :path] + + defp get_description(opts, upload) do + case {opts[:description], Pleroma.Config.get([Pleroma.Upload, :default_description])} do + {description, _} when is_binary(description) -> description + {_, :filename} -> upload.name + {_, str} when is_binary(str) -> str + _ -> "" + end + end + + @spec store(source, options :: [option()]) :: {:ok, Map.t()} | {:error, any()} + @doc "Store a file. If using a `Plug.Upload{}` as the source, be sure to use `Majic.Plug` to ensure its content_type and filename is correct." + def store(upload, opts \\ []) do + opts = get_opts(opts) + + with {:ok, upload} <- prepare_upload(upload, opts), + upload = %__MODULE__{upload | path: upload.path || "#{upload.id}/#{upload.name}"}, + {:ok, upload} <- Pleroma.Upload.Filter.filter(opts.filters, upload), + description = get_description(opts, upload), + {_, true} <- + {:description_limit, + String.length(description) <= Pleroma.Config.get([:instance, :description_limit])}, + {:ok, url_spec} <- Pleroma.Uploaders.Uploader.put_file(opts.uploader, upload) do + {:ok, + %{ + "type" => opts.activity_type, + "mediaType" => upload.content_type, + "url" => [ + %{ + "type" => "Link", + "mediaType" => upload.content_type, + "href" => url_from_spec(upload, opts.base_url, url_spec) + } + |> Maps.put_if_present("width", upload.width) + |> Maps.put_if_present("height", upload.height) + ], + "name" => description + } + |> Maps.put_if_present("blurhash", upload.blurhash)} + else + {:description_limit, _} -> + {:error, :description_too_long} + + {:error, error} -> + Logger.error( + "#{__MODULE__} store (using #{inspect(opts.uploader)}) failed: #{inspect(error)}" + ) + + {:error, error} + end + end + + def char_unescaped?(char) do + URI.char_unreserved?(char) or char == ?/ + end + + defp get_opts(opts) do + {size_limit, activity_type} = + case Keyword.get(opts, :type) do + :banner -> + {Pleroma.Config.get!([:instance, :banner_upload_limit]), "Image"} + + :avatar -> + {Pleroma.Config.get!([:instance, :avatar_upload_limit]), "Image"} + + :background -> + {Pleroma.Config.get!([:instance, :background_upload_limit]), "Image"} + + _ -> + {Pleroma.Config.get!([:instance, :upload_limit]), "Document"} + end + + %{ + activity_type: Keyword.get(opts, :activity_type, activity_type), + size_limit: Keyword.get(opts, :size_limit, size_limit), + uploader: Keyword.get(opts, :uploader, Pleroma.Config.get([__MODULE__, :uploader])), + filters: Keyword.get(opts, :filters, Pleroma.Config.get([__MODULE__, :filters])), + description: Keyword.get(opts, :description), + base_url: base_url() + } + end + + defp prepare_upload(%Plug.Upload{} = file, opts) do + with :ok <- check_file_size(file.path, opts.size_limit) do + {:ok, + %__MODULE__{ + id: UUID.generate(), + name: file.filename, + tempfile: file.path, + content_type: file.content_type + }} + end + end + + defp prepare_upload(%{img: "data:image/" <> image_data}, opts) do + parsed = Regex.named_captures(~r/(?jpeg|png|gif);base64,(?.*)/, image_data) + data = Base.decode64!(parsed["data"], ignore: :whitespace) + hash = Base.encode16(:crypto.hash(:sha256, data), lower: true) + + with :ok <- check_binary_size(data, opts.size_limit), + tmp_path <- tempfile_for_image(data), + {:ok, %{mime_type: content_type}} <- + Majic.perform({:bytes, data}, pool: Pleroma.MajicPool), + [ext | _] <- MIME.extensions(content_type) do + {:ok, + %__MODULE__{ + id: UUID.generate(), + name: hash <> "." <> ext, + tempfile: tmp_path, + content_type: content_type + }} + end + end + + # For Mix.Tasks.MigrateLocalUploads + defp prepare_upload(%__MODULE__{tempfile: path} = upload, _opts) do + with {:ok, %{mime_type: content_type}} <- Majic.perform(path, pool: Pleroma.MajicPool) do + {:ok, %__MODULE__{upload | content_type: content_type}} + end + end + + defp check_binary_size(binary, size_limit) + when is_integer(size_limit) and size_limit > 0 and byte_size(binary) >= size_limit do + {:error, :file_too_large} + end + + defp check_binary_size(_, _), do: :ok + + defp check_file_size(path, size_limit) when is_integer(size_limit) and size_limit > 0 do + with {:ok, %{size: size}} <- File.stat(path), + true <- size <= size_limit do + :ok + else + false -> {:error, :file_too_large} + error -> error + end + end + + defp check_file_size(_, _), do: :ok + + # Creates a tempfile using the Plug.Upload Genserver which cleans them up + # automatically. + defp tempfile_for_image(data) do + {:ok, tmp_path} = Plug.Upload.random_file("profile_pics") + {:ok, tmp_file} = File.open(tmp_path, [:write, :raw, :binary]) + IO.binwrite(tmp_file, data) + + tmp_path + end + + defp url_from_spec(%__MODULE__{name: name}, base_url, {:file, path}) do + path = + URI.encode(path, &char_unescaped?/1) <> + if Pleroma.Config.get([__MODULE__, :link_name], false) do + "?name=#{URI.encode(name, &char_unescaped?/1)}" + else + "" + end + + if String.contains?(base_url, Pleroma.Uploaders.IPFS.placeholder()) do + String.replace(base_url, Pleroma.Uploaders.IPFS.placeholder(), path) + else + [base_url, path] + |> Path.join() + end + end + + defp url_from_spec(_upload, _base_url, {:url, url}), do: url + + def base_url do + uploader = Config.get([Pleroma.Upload, :uploader]) + upload_base_url = Config.get([Pleroma.Upload, :base_url]) + public_endpoint = Config.get([uploader, :public_endpoint]) + + case uploader do + Pleroma.Uploaders.Local -> + upload_base_url || Pleroma.Web.Endpoint.url() <> "/media/" + + Pleroma.Uploaders.S3 -> + bucket = Config.get([Pleroma.Uploaders.S3, :bucket]) + truncated_namespace = Config.get([Pleroma.Uploaders.S3, :truncated_namespace]) + namespace = Config.get([Pleroma.Uploaders.S3, :bucket_namespace]) + + bucket_with_namespace = + cond do + !is_nil(truncated_namespace) -> + truncated_namespace + + !is_nil(namespace) -> + namespace <> ":" <> bucket + + true -> + bucket + end + + if public_endpoint do + Path.join([public_endpoint, bucket_with_namespace]) + else + Path.join([upload_base_url, bucket_with_namespace]) + end + + Pleroma.Uploaders.IPFS -> + Config.get([Pleroma.Uploaders.IPFS, :get_gateway_url]) + + _ -> + public_endpoint || upload_base_url || Pleroma.Web.Endpoint.url() <> "/media/" + end + end +end diff --git a/lib/pleroma/uploaders/ipfs.ex b/lib/pleroma/uploaders/ipfs.ex new file mode 100644 index 0000000..2e8683e --- /dev/null +++ b/lib/pleroma/uploaders/ipfs.ex @@ -0,0 +1,75 @@ +# Copyright © 2022 Claudio Maradonna +# SPDX-License-Identifier: AGPL-3.0-only + +defmodule Pleroma.Uploaders.IPFS do + @behaviour Pleroma.Uploaders.Uploader + require Logger + + alias Pleroma.Config + alias Tesla.Multipart + + defp get_final_url(method) do + config = Config.get([__MODULE__]) + post_base_url = Keyword.get(config, :post_gateway_url) + + Path.join([post_base_url, method]) + end + + def put_file_endpoint do + get_final_url("/api/v0/add") + end + + def delete_file_endpoint do + get_final_url("/api/v0/files/rm") + end + + @placeholder "{CID}" + def placeholder, do: @placeholder + + @impl true + def get_file(file) do + b_url = Pleroma.Upload.base_url() + + if String.contains?(b_url, @placeholder) do + {:ok, {:url, String.replace(b_url, @placeholder, URI.decode(file))}} + else + {:error, "IPFS Get URL doesn't contain 'cid' placeholder"} + end + end + + @impl true + def put_file(%Pleroma.Upload{} = upload) do + mp = + Multipart.new() + |> Multipart.add_content_type_param("charset=utf-8") + |> Multipart.add_file(upload.tempfile) + + case Pleroma.HTTP.post(put_file_endpoint(), mp, [], params: ["cid-version": "1"]) do + {:ok, ret} -> + case Jason.decode(ret.body) do + {:ok, ret} -> + if Map.has_key?(ret, "Hash") do + {:ok, {:file, ret["Hash"]}} + else + {:error, "JSON doesn't contain Hash key"} + end + + error -> + Logger.error("#{__MODULE__}: #{inspect(error)}") + {:error, "JSON decode failed"} + end + + error -> + Logger.error("#{__MODULE__}: #{inspect(error)}") + {:error, "IPFS Gateway upload failed"} + end + end + + @impl true + def delete_file(file) do + case Pleroma.HTTP.post(delete_file_endpoint(), "", [], params: [arg: file]) do + {:ok, %{status_code: 204}} -> :ok + error -> {:error, inspect(error)} + end + end +end diff --git a/test/pleroma/uploaders/ipfs_test.exs b/test/pleroma/uploaders/ipfs_test.exs new file mode 100644 index 0000000..52bfaf4 --- /dev/null +++ b/test/pleroma/uploaders/ipfs_test.exs @@ -0,0 +1,129 @@ +# Copyright © 2022 Claudio Maradonna +# SPDX-License-Identifier: AGPL-3.0-only + +defmodule Pleroma.Uploaders.IPFSTest do + use Pleroma.DataCase + + alias Pleroma.Uploaders.IPFS + alias Tesla.Multipart + + import Mock + import ExUnit.CaptureLog + + setup do + clear_config([Pleroma.Upload, :uploader], Pleroma.Uploaders.IPFS) + clear_config([Pleroma.Uploaders.IPFS]) + + clear_config( + [Pleroma.Uploaders.IPFS, :get_gateway_url], + "https://{CID}.ipfs.mydomain.com" + ) + + clear_config([Pleroma.Uploaders.IPFS, :post_gateway_url], "http://localhost:5001") + end + + describe "get_final_url" do + test "it returns the final url for put_file" do + assert IPFS.put_file_endpoint() == "http://localhost:5001/api/v0/add" + end + + test "it returns the final url for delete_file" do + assert IPFS.delete_file_endpoint() == "http://localhost:5001/api/v0/files/rm" + end + end + + describe "get_file/1" do + test "it returns path to ipfs file with cid as subdomain" do + assert IPFS.get_file("testcid") == { + :ok, + {:url, "https://testcid.ipfs.mydomain.com"} + } + end + + test "it returns path to ipfs file with cid as path" do + clear_config( + [Pleroma.Uploaders.IPFS, :get_gateway_url], + "https://ipfs.mydomain.com/ipfs/{CID}" + ) + + assert IPFS.get_file("testcid") == { + :ok, + {:url, "https://ipfs.mydomain.com/ipfs/testcid"} + } + end + end + + describe "put_file/1" do + setup do + file_upload = %Pleroma.Upload{ + name: "image-tet.jpg", + content_type: "image/jpeg", + path: "test_folder/image-tet.jpg", + tempfile: Path.absname("test/instance_static/add/shortcode.png") + } + + mp = + Multipart.new() + |> Multipart.add_content_type_param("charset=utf-8") + |> Multipart.add_file(file_upload.tempfile) + + [file_upload: file_upload, mp: mp] + end + + test "save file", %{file_upload: file_upload} do + with_mock Pleroma.HTTP, + post: fn "http://localhost:5001/api/v0/add", mp, [], params: ["cid-version": "1"] -> + {:ok, + %Tesla.Env{ + status: 200, + body: + "{\"Name\":\"image-tet.jpg\",\"Size\":\"5000\", \"Hash\":\"bafybeicrh7ltzx52yxcwrvxxckfmwhqdgsb6qym6dxqm2a4ymsakeshwoi\"}" + }} + end do + assert IPFS.put_file(file_upload) == + {:ok, {:file, "bafybeicrh7ltzx52yxcwrvxxckfmwhqdgsb6qym6dxqm2a4ymsakeshwoi"}} + end + end + + test "returns error", %{file_upload: file_upload} do + with_mock Pleroma.HTTP, + post: fn "http://localhost:5001/api/v0/add", mp, [], params: ["cid-version": "1"] -> + {:error, "IPFS Gateway upload failed"} + end do + assert capture_log(fn -> + assert IPFS.put_file(file_upload) == {:error, "IPFS Gateway upload failed"} + end) =~ "Elixir.Pleroma.Uploaders.IPFS: {:error, \"IPFS Gateway upload failed\"}" + end + end + + test "returns error if JSON decode fails", %{file_upload: file_upload} do + with_mock Pleroma.HTTP, [], + post: fn "http://localhost:5001/api/v0/add", mp, [], params: ["cid-version": "1"] -> + {:ok, %Tesla.Env{status: 200, body: "invalid"}} + end do + assert capture_log(fn -> + assert IPFS.put_file(file_upload) == {:error, "JSON decode failed"} + end) =~ + "Elixir.Pleroma.Uploaders.IPFS: {:error, %Jason.DecodeError{data: \"invalid\", position: 0, token: nil}}" + end + end + + test "returns error if JSON body doesn't contain Hash key", %{file_upload: file_upload} do + with_mock Pleroma.HTTP, [], + post: fn "http://localhost:5001/api/v0/add", mp, [], params: ["cid-version": "1"] -> + {:ok, %Tesla.Env{status: 200, body: "{\"key\": \"value\"}"}} + end do + assert IPFS.put_file(file_upload) == {:error, "JSON doesn't contain Hash key"} + end + end + end + + describe "delete_file/1" do + test_with_mock "deletes file", Pleroma.HTTP, + post: fn "http://localhost:5001/api/v0/files/rm", "", [], params: [arg: "image.jpg"] -> + {:ok, %{status_code: 204}} + end do + assert :ok = IPFS.delete_file("image.jpg") + end + end +end