defmodule Pleroma.Web.OStatus do
- alias Pleroma.Web
+ @httpoison Application.get_env(:pleroma, :httpoison)
+
+ import Ecto.Query
+ import Pleroma.Web.XML
+ require Logger
+
+ alias Pleroma.{Repo, User, Web, Object, Activity}
+ alias Pleroma.Web.ActivityPub.ActivityPub
+ alias Pleroma.Web.ActivityPub.Utils
+ alias Pleroma.Web.{WebFinger, Websub}
+ alias Pleroma.Web.OStatus.{FollowHandler, NoteHandler, DeleteHandler}
def feed_path(user) do
"#{user.ap_id}/feed.atom"
"#{Web.base_url}/push/hub/#{user.nickname}"
end
- def user_path(user) do
+ def salmon_path(user) do
+ "#{user.ap_id}/salmon"
+ end
+
+ def handle_incoming(xml_string) do
+ with doc when doc != :error <- parse_document(xml_string) do
+ entries = :xmerl_xpath.string('//entry', doc)
+
+ activities = Enum.map(entries, fn (entry) ->
+ {:xmlObj, :string, object_type} = :xmerl_xpath.string('string(/entry/activity:object-type[1])', entry)
+ {:xmlObj, :string, verb} = :xmerl_xpath.string('string(/entry/activity:verb[1])', entry)
+ Logger.debug("Handling #{verb}")
+
+ try do
+ case verb do
+ 'http://activitystrea.ms/schema/1.0/delete' ->
+ with {:ok, activity} <- DeleteHandler.handle_delete(entry, doc), do: activity
+ 'http://activitystrea.ms/schema/1.0/follow' ->
+ with {:ok, activity} <- FollowHandler.handle(entry, doc), do: activity
+ 'http://activitystrea.ms/schema/1.0/share' ->
+ with {:ok, activity, retweeted_activity} <- handle_share(entry, doc), do: [activity, retweeted_activity]
+ 'http://activitystrea.ms/schema/1.0/favorite' ->
+ with {:ok, activity, favorited_activity} <- handle_favorite(entry, doc), do: [activity, favorited_activity]
+ _ ->
+ case object_type do
+ 'http://activitystrea.ms/schema/1.0/note' ->
+ with {:ok, activity} <- NoteHandler.handle_note(entry, doc), do: activity
+ 'http://activitystrea.ms/schema/1.0/comment' ->
+ with {:ok, activity} <- NoteHandler.handle_note(entry, doc), do: activity
+ _ ->
+ Logger.error("Couldn't parse incoming document")
+ nil
+ end
+ end
+ rescue
+ e ->
+ Logger.error("Error occured while handling activity")
+ Logger.error(xml_string)
+ Logger.error(inspect(e))
+ nil
+ end
+ end)
+ |> Enum.filter(&(&1))
+
+ {:ok, activities}
+ else
+ _e -> {:error, []}
+ end
+ end
+
+ def make_share(entry, doc, retweeted_activity) do
+ with {:ok, actor} <- find_make_or_update_user(doc),
+ %Object{} = object <- Object.get_by_ap_id(retweeted_activity.data["object"]["id"]),
+ id when not is_nil(id) <- string_from_xpath("/entry/id", entry),
+ {:ok, activity, _object} = ActivityPub.announce(actor, object, id, false) do
+ {:ok, activity}
+ end
+ end
+
+ def handle_share(entry, doc) do
+ with {:ok, retweeted_activity} <- get_or_build_object(entry),
+ {:ok, activity} <- make_share(entry, doc, retweeted_activity) do
+ {:ok, activity, retweeted_activity}
+ else
+ e -> {:error, e}
+ end
+ end
+
+ def make_favorite(entry, doc, favorited_activity) do
+ with {:ok, actor} <- find_make_or_update_user(doc),
+ %Object{} = object <- Object.get_by_ap_id(favorited_activity.data["object"]["id"]),
+ id when not is_nil(id) <- string_from_xpath("/entry/id", entry),
+ {:ok, activity, _object} = ActivityPub.like(actor, object, id, false) do
+ {:ok, activity}
+ end
+ end
+
+ def get_or_build_object(entry) do
+ with {:ok, activity} <- get_or_try_fetching(entry) do
+ {:ok, activity}
+ else
+ _e ->
+ with [object] <- :xmerl_xpath.string('/entry/activity:object', entry) do
+ NoteHandler.handle_note(object, object)
+ end
+ end
+ end
+
+ def get_or_try_fetching(entry) do
+ Logger.debug("Trying to get entry from db")
+ with id when not is_nil(id) <- string_from_xpath("//activity:object[1]/id", entry),
+ %Activity{} = activity <- Activity.get_create_activity_by_object_ap_id(id) do
+ {:ok, activity}
+ else e ->
+ Logger.debug("Couldn't get, will try to fetch")
+ with href when not is_nil(href) <- string_from_xpath("//activity:object[1]/link[@type=\"text/html\"]/@href", entry),
+ {:ok, [favorited_activity]} <- fetch_activity_from_url(href) do
+ {:ok, favorited_activity}
+ else e -> Logger.debug("Couldn't find href: #{inspect(e)}")
+ end
+ end
+ end
+
+ def handle_favorite(entry, doc) do
+ with {:ok, favorited_activity} <- get_or_try_fetching(entry),
+ {:ok, activity} <- make_favorite(entry, doc, favorited_activity) do
+ {:ok, activity, favorited_activity}
+ else
+ e -> {:error, e}
+ end
+ end
+
+ def get_attachments(entry) do
+ :xmerl_xpath.string('/entry/link[@rel="enclosure"]', entry)
+ |> Enum.map(fn (enclosure) ->
+ with href when not is_nil(href) <- string_from_xpath("/link/@href", enclosure),
+ type when not is_nil(type) <- string_from_xpath("/link/@type", enclosure) do
+ %{
+ "type" => "Attachment",
+ "url" => [%{
+ "type" => "Link",
+ "mediaType" => type,
+ "href" => href
+ }]
+ }
+ end
+ end)
+ |> Enum.filter(&(&1))
+ end
+
+ @doc """
+ Gets the content from a an entry.
+ """
+ def get_content(entry) do
+ string_from_xpath("//content", entry)
+ end
+
+ @doc """
+ Get the cw that mastodon uses.
+ """
+ def get_cw(entry) do
+ with scope when not is_nil(scope) <- string_from_xpath("//mastodon:scope", entry),
+ cw when not is_nil(cw) <- string_from_xpath("/*/summary", entry) do
+ cw
+ else _e -> nil
+ end
+ end
+
+ def get_tags(entry) do
+ :xmerl_xpath.string('//category', entry)
+ |> Enum.map(fn (category) -> string_from_xpath("/category/@term", category) end)
+ |> Enum.filter(&(&1))
+ |> Enum.map(&String.downcase/1)
+ end
+
+ def maybe_update(doc, user) do
+ old_data = %{
+ avatar: user.avatar,
+ bio: user.bio,
+ name: user.name,
+ info: user.info
+ }
+
+ with false <- user.local,
+ avatar <- make_avatar_object(doc),
+ bio <- string_from_xpath("//author[1]/summary", doc),
+ name <- string_from_xpath("//author[1]/poco:displayName", doc),
+ info <- Map.put(user.info, "banner", make_avatar_object(doc, "header") || user.info["banner"]),
+ new_data <- %{avatar: avatar || old_data.avatar, name: name || old_data.name, bio: bio || old_data.bio, info: info || old_data.info},
+ false <- new_data == old_data do
+ change = Ecto.Changeset.change(user, new_data)
+ Repo.update(change)
+ else e ->
+ {:ok, user}
+ end
+ end
+
+ def find_make_or_update_user(doc) do
+ uri = string_from_xpath("//author/uri[1]", doc)
+ with {:ok, user} <- find_or_make_user(uri) do
+ maybe_update(doc, user)
+ end
+ end
+
+ def find_or_make_user(uri) do
+ query = from user in User,
+ where: user.ap_id == ^uri
+
+ user = Repo.one(query)
+
+ if is_nil(user) do
+ make_user(uri)
+ else
+ {:ok, user}
+ end
+ end
+
+ def insert_or_update_user(data) do
+ cs = User.remote_user_creation(data)
+ Repo.insert(cs, on_conflict: :replace_all, conflict_target: :nickname)
+ end
+
+ def make_user(uri, update \\ false) do
+ with {:ok, info} <- gather_user_info(uri) do
+ data = %{
+ name: info["name"],
+ nickname: info["nickname"] <> "@" <> info["host"],
+ ap_id: info["uri"],
+ info: info,
+ avatar: info["avatar"],
+ bio: info["bio"]
+ }
+ with false <- update,
+ %User{} = user <- User.get_by_ap_id(data.ap_id) do
+ {:ok, user}
+ else _e -> insert_or_update_user(data)
+ end
+ end
+ end
+
+ # TODO: Just takes the first one for now.
+ def make_avatar_object(author_doc, rel \\ "avatar") do
+ href = string_from_xpath("//author[1]/link[@rel=\"#{rel}\"]/@href", author_doc)
+ type = string_from_xpath("//author[1]/link[@rel=\"#{rel}\"]/@type", author_doc)
+
+ if href do
+ %{
+ "type" => "Image",
+ "url" =>
+ [%{
+ "type" => "Link",
+ "mediaType" => type,
+ "href" => href
+ }]
+ }
+ else
+ nil
+ end
+ end
+
+ def gather_user_info(username) do
+ with {:ok, webfinger_data} <- WebFinger.finger(username),
+ {:ok, feed_data} <- Websub.gather_feed_data(webfinger_data["topic"]) do
+ {:ok, Map.merge(webfinger_data, feed_data) |> Map.put("fqn", username)}
+ else e ->
+ Logger.debug(fn -> "Couldn't gather info for #{username}" end)
+ {:error, e}
+ end
+ end
+
+ # Regex-based 'parsing' so we don't have to pull in a full html parser
+ # It's a hack anyway. Maybe revisit this in the future
+ @mastodon_regex ~r/<link href='(.*)' rel='alternate' type='application\/atom\+xml'>/
+ @gs_regex ~r/<link title=.* href="(.*)" type="application\/atom\+xml" rel="alternate">/
+ @gs_classic_regex ~r/<link rel="alternate" href="(.*)" type="application\/atom\+xml" title=.*>/
+ def get_atom_url(body) do
+ cond do
+ Regex.match?(@mastodon_regex, body) ->
+ [[_, match]] = Regex.scan(@mastodon_regex, body)
+ {:ok, match}
+ Regex.match?(@gs_regex, body) ->
+ [[_, match]] = Regex.scan(@gs_regex, body)
+ {:ok, match}
+ Regex.match?(@gs_classic_regex, body) ->
+ [[_, match]] = Regex.scan(@gs_classic_regex, body)
+ {:ok, match}
+ true ->
+ Logger.debug(fn -> "Couldn't find atom link in #{inspect(body)}" end)
+ {:error, "Couldn't find the atom link"}
+ end
+ end
+
+ def fetch_activity_from_atom_url(url) do
+ with {:ok, %{body: body, status_code: code}} when code in 200..299 <- @httpoison.get(url, [Accept: "application/atom+xml"], follow_redirect: true, timeout: 10000, recv_timeout: 20000) do
+ Logger.debug("Got document from #{url}, handling...")
+ handle_incoming(body)
+ else e -> Logger.debug("Couldn't get #{url}: #{inspect(e)}")
+ end
+ end
+
+ def fetch_activity_from_html_url(url) do
+ Logger.debug("Trying to fetch #{url}")
+ with {:ok, %{body: body}} <- @httpoison.get(url, [], follow_redirect: true, timeout: 10000, recv_timeout: 20000),
+ {:ok, atom_url} <- get_atom_url(body) do
+ fetch_activity_from_atom_url(atom_url)
+ else e -> Logger.debug("Couldn't get #{url}: #{inspect(e)}")
+ end
+ end
+
+ def fetch_activity_from_url(url) do
+ try do
+ with {:ok, activities} when length(activities) > 0 <- fetch_activity_from_atom_url(url) do
+ {:ok, activities}
+ else
+ _e -> with {:ok, activities} <- fetch_activity_from_html_url(url) do
+ {:ok, activities}
+ end
+ end
+ rescue
+ e ->
+ Logger.debug("Couldn't get #{url}: #{inspect(e)}")
+ {:error, "Couldn't get #{url}: #{inspect(e)}"}
+ end
end
end
projects / akkoma / blobdiff