git.squeep.com Git - akkoma/blob - lib/pleroma/web/ostatus/ostatus_controller.ex

   1 # Pleroma: A lightweight social networking server
   2 # Copyright © 2017-2019 Pleroma Authors <https://pleroma.social/>
   3 # SPDX-License-Identifier: AGPL-3.0-only
   4
   5 defmodule Pleroma.Web.OStatus.OStatusController do
   6   use Pleroma.Web, :controller
   7
   8   alias Pleroma.{User, Activity, Object}
   9   alias Pleroma.Web.OStatus.{FeedRepresenter, ActivityRepresenter}
  10   alias Pleroma.Web.{OStatus, Federator}
  11   alias Pleroma.Web.XML
  12   alias Pleroma.Web.ActivityPub.ObjectView
  13   alias Pleroma.Web.ActivityPub.ActivityPubController
  14   alias Pleroma.Web.ActivityPub.ActivityPub
  15
  16   plug(Pleroma.Web.FederatingPlug when action in [:salmon_incoming])
  17   action_fallback(:errors)
  18
  19   def feed_redirect(conn, %{"nickname" => nickname}) do
  20     case get_format(conn) do
  21       "html" ->
  22         with %User{} = user <- User.get_cached_by_nickname_or_id(nickname) do
  23           Fallback.RedirectController.redirector_with_meta(conn, %{user: user})
  24         else
  25           nil -> {:error, :not_found}
  26         end
  27
  28       "activity+json" ->
  29         ActivityPubController.call(conn, :user)
  30
  31       _ ->
  32         with %User{} = user <- User.get_cached_by_nickname(nickname) do
  33           redirect(conn, external: OStatus.feed_path(user))
  34         else
  35           nil -> {:error, :not_found}
  36         end
  37     end
  38   end
  39
  40   def feed(conn, %{"nickname" => nickname} = params) do
  41     with %User{} = user <- User.get_cached_by_nickname(nickname) do
  42       query_params =
  43         Map.take(params, ["max_id"])
  44         |> Map.merge(%{"whole_db" => true, "actor_id" => user.ap_id})
  45
  46       activities =
  47         ActivityPub.fetch_public_activities(query_params)
  48         |> Enum.reverse()
  49
  50       response =
  51         user
  52         |> FeedRepresenter.to_simple_form(activities, [user])
  53         |> :xmerl.export_simple(:xmerl_xml)
  54         |> to_string
  55
  56       conn
  57       |> put_resp_content_type("application/atom+xml")
  58       |> send_resp(200, response)
  59     else
  60       nil -> {:error, :not_found}
  61     end
  62   end
  63
  64   defp decode_or_retry(body) do
  65     with {:ok, magic_key} <- Pleroma.Web.Salmon.fetch_magic_key(body),
  66          {:ok, doc} <- Pleroma.Web.Salmon.decode_and_validate(magic_key, body) do
  67       {:ok, doc}
  68     else
  69       _e ->
  70         with [decoded | _] <- Pleroma.Web.Salmon.decode(body),
  71              doc <- XML.parse_document(decoded),
  72              uri when not is_nil(uri) <- XML.string_from_xpath("/entry/author[1]/uri", doc),
  73              {:ok, _} <- Pleroma.Web.OStatus.make_user(uri, true),
  74              {:ok, magic_key} <- Pleroma.Web.Salmon.fetch_magic_key(body),
  75              {:ok, doc} <- Pleroma.Web.Salmon.decode_and_validate(magic_key, body) do
  76           {:ok, doc}
  77         end
  78     end
  79   end
  80
  81   def salmon_incoming(conn, _) do
  82     {:ok, body, _conn} = read_body(conn)
  83     {:ok, doc} = decode_or_retry(body)
  84
  85     Federator.enqueue(:incoming_doc, doc)
  86
  87     conn
  88     |> send_resp(200, "")
  89   end
  90
  91   def object(conn, %{"uuid" => uuid}) do
  92     if get_format(conn) == "activity+json" do
  93       ActivityPubController.call(conn, :object)
  94     else
  95       with id <- o_status_url(conn, :object, uuid),
  96            {_, %Activity{} = activity} <-
  97              {:activity, Activity.get_create_activity_by_object_ap_id(id)},
  98            {_, true} <- {:public?, ActivityPub.is_public?(activity)},
  99            %User{} = user <- User.get_cached_by_ap_id(activity.data["actor"]) do
 100         case get_format(conn) do
 101           "html" -> redirect(conn, to: "/notice/#{activity.id}")
 102           _ -> represent_activity(conn, nil, activity, user)
 103         end
 104       else
 105         {:public?, false} ->
 106           {:error, :not_found}
 107
 108         {:activity, nil} ->
 109           {:error, :not_found}
 110
 111         e ->
 112           e
 113       end
 114     end
 115   end
 116
 117   def activity(conn, %{"uuid" => uuid}) do
 118     if get_format(conn) == "activity+json" do
 119       ActivityPubController.call(conn, :activity)
 120     else
 121       with id <- o_status_url(conn, :activity, uuid),
 122            {_, %Activity{} = activity} <- {:activity, Activity.normalize(id)},
 123            {_, true} <- {:public?, ActivityPub.is_public?(activity)},
 124            %User{} = user <- User.get_cached_by_ap_id(activity.data["actor"]) do
 125         case format = get_format(conn) do
 126           "html" -> redirect(conn, to: "/notice/#{activity.id}")
 127           _ -> represent_activity(conn, format, activity, user)
 128         end
 129       else
 130         {:public?, false} ->
 131           {:error, :not_found}
 132
 133         {:activity, nil} ->
 134           {:error, :not_found}
 135
 136         e ->
 137           e
 138       end
 139     end
 140   end
 141
 142   def notice(conn, %{"id" => id}) do
 143     with {_, %Activity{} = activity} <- {:activity, Activity.get_by_id(id)},
 144          {_, true} <- {:public?, ActivityPub.is_public?(activity)},
 145          %User{} = user <- User.get_cached_by_ap_id(activity.data["actor"]) do
 146       case format = get_format(conn) do
 147         "html" ->
 148           Fallback.RedirectController.redirector_with_meta(conn, %{activity: activity, user: user})
 149
 150         _ ->
 151           represent_activity(conn, format, activity, user)
 152       end
 153     else
 154       {:public?, false} ->
 155         {:error, :not_found}
 156
 157       {:activity, nil} ->
 158         {:error, :not_found}
 159
 160       e ->
 161         e
 162     end
 163   end
 164
 165   defp represent_activity(
 166          conn,
 167          "activity+json",
 168          %Activity{data: %{"type" => "Create"}} = activity,
 169          _user
 170        ) do
 171     object = Object.normalize(activity.data["object"])
 172
 173     conn
 174     |> put_resp_header("content-type", "application/activity+json")
 175     |> json(ObjectView.render("object.json", %{object: object}))
 176   end
 177
 178   defp represent_activity(_conn, "activity+json", _, _) do
 179     {:error, :not_found}
 180   end
 181
 182   defp represent_activity(conn, _, activity, user) do
 183     response =
 184       activity
 185       |> ActivityRepresenter.to_simple_form(user, true)
 186       |> ActivityRepresenter.wrap_with_entry()
 187       |> :xmerl.export_simple(:xmerl_xml)
 188       |> to_string
 189
 190     conn
 191     |> put_resp_content_type("application/atom+xml")
 192     |> send_resp(200, response)
 193   end
 194
 195   def errors(conn, {:error, :not_found}) do
 196     conn
 197     |> put_status(404)
 198     |> text("Not found")
 199   end
 200
 201   def errors(conn, _) do
 202     conn
 203     |> put_status(500)
 204     |> text("Something went wrong")
 205   end
 206 end