mirror of
https://framagit.org/framasoft/mobilizon.git
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bd64e19af4
Signed-off-by: Thomas Citharel <tcit@tcit.fr>
172 lines
5.4 KiB
Elixir
172 lines
5.4 KiB
Elixir
defmodule Mobilizon.Federation.ActivityPub.Fetcher do
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@moduledoc """
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Module to handle direct URL ActivityPub fetches to remote content
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If you need to first get cached data, see `Mobilizon.Federation.ActivityPub.fetch_object_from_url/2`
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"""
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require Logger
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alias Mobilizon.Federation.HTTPSignatures.Signature
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alias Mobilizon.Federation.ActivityPub.{Relay, Transmogrifier}
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alias Mobilizon.Federation.ActivityStream.Converter.Actor, as: ActorConverter
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alias Mobilizon.Service.ErrorReporting.Sentry
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alias Mobilizon.Service.HTTP.ActivityPub, as: ActivityPubClient
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import Mobilizon.Federation.ActivityPub.Utils,
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only: [maybe_date_fetch: 2, sign_fetch: 5, origin_check?: 2]
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import Mobilizon.Service.Guards, only: [is_valid_string: 1]
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@spec fetch(String.t(), Keyword.t()) ::
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{:ok, map()}
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| {:error,
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:invalid_url | :http_gone | :http_error | :http_not_found | :content_not_json}
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def fetch(url, options \\ []) do
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on_behalf_of = Keyword.get(options, :on_behalf_of, Relay.get_actor())
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date = Signature.generate_date_header()
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headers =
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[{:Accept, "application/activity+json"}]
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|> maybe_date_fetch(date)
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|> sign_fetch(on_behalf_of, url, date, options)
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client = ActivityPubClient.client(headers: headers)
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if address_valid?(url) do
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case ActivityPubClient.get(client, url) do
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{:ok, %Tesla.Env{body: data, status: code}} when code in 200..299 and is_map(data) ->
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{:ok, data}
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{:ok, %Tesla.Env{status: 410}} ->
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Logger.debug("Resource at #{url} is 410 Gone")
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{:error, :http_gone}
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{:ok, %Tesla.Env{status: 404}} ->
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Logger.debug("Resource at #{url} is 404 Gone")
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{:error, :http_not_found}
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{:ok, %Tesla.Env{body: data}} when is_binary(data) ->
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{:error, :content_not_json}
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{:ok, %Tesla.Env{} = res} ->
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Logger.debug("Resource returned bad HTTP code #{inspect(res)}")
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{:error, :http_error}
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{:error, err} ->
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{:error, err}
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end
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else
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{:error, :invalid_url}
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end
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end
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@spec fetch_and_create(String.t(), Keyword.t()) ::
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{:ok, map(), struct()} | {:error, atom()} | :error
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def fetch_and_create(url, options \\ []) do
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case fetch(url, options) do
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{:ok, data} when is_map(data) ->
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if origin_check?(url, data) do
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case Transmogrifier.handle_incoming(%{
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"type" => "Create",
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"to" => data["to"],
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"cc" => data["cc"],
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"actor" => data["actor"] || data["attributedTo"],
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"attributedTo" => data["attributedTo"] || data["actor"],
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"object" => data
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}) do
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{:ok, entity, structure} ->
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{:ok, entity, structure}
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{:error, error} when is_atom(error) ->
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{:error, error}
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:error ->
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{:error, :transmogrifier_error}
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end
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else
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Logger.warn("Object origin check failed")
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{:error, :object_origin_check_failed}
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end
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{:error, err} ->
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{:error, err}
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end
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end
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@spec fetch_and_update(String.t(), Keyword.t()) ::
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{:ok, map(), struct()} | {:error, atom()}
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def fetch_and_update(url, options \\ []) do
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case fetch(url, options) do
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{:ok, data} when is_map(data) ->
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if origin_check(url, data) do
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Transmogrifier.handle_incoming(%{
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"type" => "Update",
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"to" => data["to"],
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"cc" => data["cc"],
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"actor" => data["actor"] || data["attributedTo"],
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"attributedTo" => data["attributedTo"] || data["actor"],
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"object" => data
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})
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else
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Logger.warn("Object origin check failed")
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{:error, :object_origin_check_failed}
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end
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{:error, err} ->
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{:error, err}
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end
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end
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@type fetch_actor_errors ::
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:json_decode_error | :actor_deleted | :http_error | :actor_not_allowed_type
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@doc """
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Fetching a remote actor's information through its AP ID
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"""
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@spec fetch_and_prepare_actor_from_url(String.t()) ::
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{:ok, map()} | {:error, fetch_actor_errors}
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def fetch_and_prepare_actor_from_url(url, options \\ []) do
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Logger.debug("Fetching and preparing actor from url")
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Logger.debug(inspect(url))
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case fetch(url, options) do
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{:ok, data} ->
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case ActorConverter.as_to_model_data(data) do
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{:error, :actor_not_allowed_type} ->
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{:error, :actor_not_allowed_type}
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map when is_map(map) ->
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{:ok, map}
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end
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{:error, :http_gone} ->
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Logger.info("Response HTTP 410")
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{:error, :actor_deleted}
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{:error, :http_error} ->
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Logger.info("Non 200 HTTP Code")
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{:error, :http_error}
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{:error, error} ->
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Logger.info("Could not fetch actor at #{url}, #{inspect(error)}")
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{:error, :http_error}
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end
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end
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@spec origin_check(String.t(), map()) :: boolean()
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defp origin_check(url, data) do
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if origin_check?(url, data) do
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true
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else
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Sentry.capture_message("Object origin check failed", extra: %{url: url, data: data})
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Logger.debug("Object origin check failed between #{inspect(url)} and #{inspect(data)}")
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false
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end
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end
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@spec address_valid?(String.t()) :: boolean
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defp address_valid?(address) do
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%URI{host: host, scheme: scheme} = URI.parse(address)
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is_valid_string(host) and is_valid_string(scheme)
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end
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end
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