1 defmodule Pleroma.Web.OStatus do
2 @httpoison Application.get_env(:pleroma, :httpoison)
8 alias Pleroma.{Repo, User, Web, Object, Activity}
9 alias Pleroma.Web.ActivityPub.ActivityPub
10 alias Pleroma.Web.{WebFinger, Websub}
11 alias Pleroma.Web.OStatus.{FollowHandler, NoteHandler, DeleteHandler}
13 def feed_path(user) do
14 "#{user.ap_id}/feed.atom"
17 def pubsub_path(user) do
18 "#{Web.base_url}/push/hub/#{user.nickname}"
21 def salmon_path(user) do
22 "#{user.ap_id}/salmon"
25 def handle_incoming(xml_string) do
26 with doc when doc != :error <- parse_document(xml_string) do
27 entries = :xmerl_xpath.string('//entry', doc)
29 activities = Enum.map(entries, fn (entry) ->
30 {:xmlObj, :string, object_type} = :xmerl_xpath.string('string(/entry/activity:object-type[1])', entry)
31 {:xmlObj, :string, verb} = :xmerl_xpath.string('string(/entry/activity:verb[1])', entry)
32 Logger.debug("Handling #{verb}")
36 'http://activitystrea.ms/schema/1.0/delete' ->
37 with {:ok, activity} <- DeleteHandler.handle_delete(entry, doc), do: activity
38 'http://activitystrea.ms/schema/1.0/follow' ->
39 with {:ok, activity} <- FollowHandler.handle(entry, doc), do: activity
40 'http://activitystrea.ms/schema/1.0/share' ->
41 with {:ok, activity, retweeted_activity} <- handle_share(entry, doc), do: [activity, retweeted_activity]
42 'http://activitystrea.ms/schema/1.0/favorite' ->
43 with {:ok, activity, favorited_activity} <- handle_favorite(entry, doc), do: [activity, favorited_activity]
46 'http://activitystrea.ms/schema/1.0/note' ->
47 with {:ok, activity} <- NoteHandler.handle_note(entry, doc), do: activity
48 'http://activitystrea.ms/schema/1.0/comment' ->
49 with {:ok, activity} <- NoteHandler.handle_note(entry, doc), do: activity
51 Logger.error("Couldn't parse incoming document")
57 Logger.error("Error occured while handling activity")
58 Logger.error(xml_string)
59 Logger.error(inspect(e))
71 def make_share(entry, doc, retweeted_activity) do
72 with {:ok, actor} <- find_make_or_update_user(doc),
73 %Object{} = object <- Object.get_by_ap_id(retweeted_activity.data["object"]["id"]),
74 id when not is_nil(id) <- string_from_xpath("/entry/id", entry),
75 {:ok, activity, _object} = ActivityPub.announce(actor, object, id, false) do
80 def handle_share(entry, doc) do
81 with {:ok, retweeted_activity} <- get_or_build_object(entry),
82 {:ok, activity} <- make_share(entry, doc, retweeted_activity) do
83 {:ok, activity, retweeted_activity}
89 def make_favorite(entry, doc, favorited_activity) do
90 with {:ok, actor} <- find_make_or_update_user(doc),
91 %Object{} = object <- Object.get_by_ap_id(favorited_activity.data["object"]["id"]),
92 id when not is_nil(id) <- string_from_xpath("/entry/id", entry),
93 {:ok, activity, _object} = ActivityPub.like(actor, object, id, false) do
98 def get_or_build_object(entry) do
99 with {:ok, activity} <- get_or_try_fetching(entry) do
103 with [object] <- :xmerl_xpath.string('/entry/activity:object', entry) do
104 NoteHandler.handle_note(object, object)
109 def get_or_try_fetching(entry) do
110 Logger.debug("Trying to get entry from db")
111 with id when not is_nil(id) <- string_from_xpath("//activity:object[1]/id", entry),
112 %Activity{} = activity <- Activity.get_create_activity_by_object_ap_id(id) do
115 Logger.debug("Couldn't get, will try to fetch")
116 with href when not is_nil(href) <- string_from_xpath("//activity:object[1]/link[@type=\"text/html\"]/@href", entry),
117 {:ok, [favorited_activity]} <- fetch_activity_from_url(href) do
118 {:ok, favorited_activity}
119 else e -> Logger.debug("Couldn't find href: #{inspect(e)}")
124 def handle_favorite(entry, doc) do
125 with {:ok, favorited_activity} <- get_or_try_fetching(entry),
126 {:ok, activity} <- make_favorite(entry, doc, favorited_activity) do
127 {:ok, activity, favorited_activity}
133 def get_attachments(entry) do
134 :xmerl_xpath.string('/entry/link[@rel="enclosure"]', entry)
135 |> Enum.map(fn (enclosure) ->
136 with href when not is_nil(href) <- string_from_xpath("/link/@href", enclosure),
137 type when not is_nil(type) <- string_from_xpath("/link/@type", enclosure) do
139 "type" => "Attachment",
148 |> Enum.filter(&(&1))
152 Gets the content from a an entry.
154 def get_content(entry) do
155 string_from_xpath("//content", entry)
159 Get the cw that mastodon uses.
162 with scope when not is_nil(scope) <- string_from_xpath("//mastodon:scope", entry),
163 cw when not is_nil(cw) <- string_from_xpath("/*/summary", entry) do
169 def get_tags(entry) do
170 :xmerl_xpath.string('//category', entry)
171 |> Enum.map(fn (category) -> string_from_xpath("/category/@term", category) end)
172 |> Enum.filter(&(&1))
173 |> Enum.map(&String.downcase/1)
176 def maybe_update(doc, user) do
184 with false <- user.local,
185 avatar <- make_avatar_object(doc),
186 bio <- string_from_xpath("//author[1]/summary", doc),
187 name <- string_from_xpath("//author[1]/poco:displayName", doc),
188 info <- Map.put(user.info, "banner", make_avatar_object(doc, "header") || user.info["banner"]),
189 new_data <- %{avatar: avatar || old_data.avatar, name: name || old_data.name, bio: bio || old_data.bio, info: info || old_data.info},
190 false <- new_data == old_data do
191 change = Ecto.Changeset.change(user, new_data)
198 def find_make_or_update_user(doc) do
199 uri = string_from_xpath("//author/uri[1]", doc)
200 with {:ok, user} <- find_or_make_user(uri) do
201 maybe_update(doc, user)
205 def find_or_make_user(uri) do
206 query = from user in User,
207 where: user.ap_id == ^uri
209 user = Repo.one(query)
218 def insert_or_update_user(data) do
219 cs = User.remote_user_creation(data)
220 Repo.insert(cs, on_conflict: :replace_all, conflict_target: :nickname)
223 def make_user(uri, update \\ false) do
224 with {:ok, info} <- gather_user_info(uri) do
227 nickname: info["nickname"] <> "@" <> info["host"],
230 avatar: info["avatar"],
233 with false <- update,
234 %User{} = user <- User.get_by_ap_id(data.ap_id) do
236 else _e -> insert_or_update_user(data)
241 # TODO: Just takes the first one for now.
242 def make_avatar_object(author_doc, rel \\ "avatar") do
243 href = string_from_xpath("//author[1]/link[@rel=\"#{rel}\"]/@href", author_doc)
244 type = string_from_xpath("//author[1]/link[@rel=\"#{rel}\"]/@type", author_doc)
261 def gather_user_info(username) do
262 with {:ok, webfinger_data} <- WebFinger.finger(username),
263 {:ok, feed_data} <- Websub.gather_feed_data(webfinger_data["topic"]) do
264 {:ok, Map.merge(webfinger_data, feed_data) |> Map.put("fqn", username)}
266 Logger.debug(fn -> "Couldn't gather info for #{username}" end)
271 # Regex-based 'parsing' so we don't have to pull in a full html parser
272 # It's a hack anyway. Maybe revisit this in the future
273 @mastodon_regex ~r/<link href='(.*)' rel='alternate' type='application\/atom\+xml'>/
274 @gs_regex ~r/<link title=.* href="(.*)" type="application\/atom\+xml" rel="alternate">/
275 @gs_classic_regex ~r/<link rel="alternate" href="(.*)" type="application\/atom\+xml" title=.*>/
276 def get_atom_url(body) do
278 Regex.match?(@mastodon_regex, body) ->
279 [[_, match]] = Regex.scan(@mastodon_regex, body)
281 Regex.match?(@gs_regex, body) ->
282 [[_, match]] = Regex.scan(@gs_regex, body)
284 Regex.match?(@gs_classic_regex, body) ->
285 [[_, match]] = Regex.scan(@gs_classic_regex, body)
288 Logger.debug(fn -> "Couldn't find atom link in #{inspect(body)}" end)
289 {:error, "Couldn't find the atom link"}
293 def fetch_activity_from_atom_url(url) do
294 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
295 Logger.debug("Got document from #{url}, handling...")
296 handle_incoming(body)
297 else e -> Logger.debug("Couldn't get #{url}: #{inspect(e)}")
301 def fetch_activity_from_html_url(url) do
302 Logger.debug("Trying to fetch #{url}")
303 with {:ok, %{body: body}} <- @httpoison.get(url, [], follow_redirect: true, timeout: 10000, recv_timeout: 20000),
304 {:ok, atom_url} <- get_atom_url(body) do
305 fetch_activity_from_atom_url(atom_url)
306 else e -> Logger.debug("Couldn't get #{url}: #{inspect(e)}")
310 def fetch_activity_from_url(url) do
312 with {:ok, activities} when length(activities) > 0 <- fetch_activity_from_atom_url(url) do
315 _e -> with {:ok, activities} <- fetch_activity_from_html_url(url) do
321 Logger.debug("Couldn't get #{url}: #{inspect(e)}")
322 {:error, "Couldn't get #{url}: #{inspect(e)}"}