1 defmodule Pleroma.Web.WebFinger do
2 @httpoison Application.get_env(:pleroma, :httpoison)
4 alias Pleroma.{User, XmlBuilder}
6 alias Pleroma.Web.{XML, Salmon, OStatus}
11 base_url = Web.base_url()
15 %{xmlns: "http://docs.oasis-open.org/ns/xri/xrd-1.0"},
20 type: "application/xrd+xml",
21 template: "#{base_url}/.well-known/webfinger?resource={uri}"
25 |> XmlBuilder.to_doc()
28 def webfinger(resource, "JSON") do
29 host = Pleroma.Web.Endpoint.host()
30 regex = ~r/(acct:)?(?<username>\w+)@#{host}/
32 with %{"username" => username} <- Regex.named_captures(regex, resource) do
33 user = User.get_by_nickname(username)
34 {:ok, represent_user(user, "JSON")}
37 with user when not is_nil(user) <- User.get_cached_by_ap_id(resource) do
38 {:ok, represent_user(user, "JSON")}
41 {:error, "Couldn't find user"}
46 def webfinger(resource, "XML") do
47 host = Pleroma.Web.Endpoint.host()
48 regex = ~r/(acct:)?(?<username>\w+)@#{host}/
50 with %{"username" => username} <- Regex.named_captures(regex, resource) do
51 user = User.get_by_nickname(username)
52 {:ok, represent_user(user, "XML")}
55 with user when not is_nil(user) <- User.get_cached_by_ap_id(resource) do
56 {:ok, represent_user(user, "XML")}
59 {:error, "Couldn't find user"}
64 def represent_user(user, "JSON") do
65 {:ok, user} = ensure_keys_present(user)
66 {:ok, _private, public} = Salmon.keys_from_pem(user.info["keys"])
67 magic_key = Salmon.encode_key(public)
70 "subject" => "acct:#{user.nickname}@#{Pleroma.Web.Endpoint.host()}",
71 "aliases" => [user.ap_id],
74 "rel" => "http://schemas.google.com/g/2010#updates-from",
75 "type" => "application/atom+xml",
76 "href" => OStatus.feed_path(user)
79 "rel" => "http://webfinger.net/rel/profile-page",
80 "type" => "text/html",
83 %{"rel" => "salmon", "href" => OStatus.salmon_path(user)},
85 "rel" => "magic-public-key",
86 "href" => "data:application/magic-public-key,#{magic_key}"
88 %{"rel" => "self", "type" => "application/activity+json", "href" => user.ap_id},
89 %{"rel" => "self", "type" => "application/ld+json; profile=\"https://www.w3.org/ns/activitystreams\"", "href" => user.ap_id},
91 "rel" => "http://ostatus.org/schema/1.0/subscribe",
92 "template" => OStatus.remote_follow_path()
98 def represent_user(user, "XML") do
99 {:ok, user} = ensure_keys_present(user)
100 {:ok, _private, public} = Salmon.keys_from_pem(user.info["keys"])
101 magic_key = Salmon.encode_key(public)
105 %{xmlns: "http://docs.oasis-open.org/ns/xri/xrd-1.0"},
107 {:Subject, "acct:#{user.nickname}@#{Pleroma.Web.Endpoint.host()}"},
108 {:Alias, user.ap_id},
111 rel: "http://schemas.google.com/g/2010#updates-from",
112 type: "application/atom+xml",
113 href: OStatus.feed_path(user)
116 %{rel: "http://webfinger.net/rel/profile-page", type: "text/html", href: user.ap_id}},
117 {:Link, %{rel: "salmon", href: OStatus.salmon_path(user)}},
119 %{rel: "magic-public-key", href: "data:application/magic-public-key,#{magic_key}"}},
120 {:Link, %{rel: "self", type: "application/activity+json", href: user.ap_id}},
121 {:Link, %{rel: "self", type: "application/ld+json; profile="https://www.w3.org/ns/activitystreams"", href: user.ap_id}},
123 %{rel: "http://ostatus.org/schema/1.0/subscribe", template: OStatus.remote_follow_path()}}
126 |> XmlBuilder.to_doc()
129 # This seems a better fit in Salmon
130 def ensure_keys_present(user) do
131 info = user.info || %{}
136 {:ok, pem} = Salmon.generate_rsa_pem()
137 info = Map.put(info, "keys", pem)
139 Ecto.Changeset.change(user, info: info)
140 |> User.update_and_set_cache()
144 defp webfinger_from_xml(doc) do
145 magic_key = XML.string_from_xpath(~s{//Link[@rel="magic-public-key"]/@href}, doc)
146 "data:application/magic-public-key," <> magic_key = magic_key
149 XML.string_from_xpath(
150 ~s{//Link[@rel="http://schemas.google.com/g/2010#updates-from"]/@href},
154 subject = XML.string_from_xpath("//Subject", doc)
155 salmon = XML.string_from_xpath(~s{//Link[@rel="salmon"]/@href}, doc)
158 XML.string_from_xpath(
159 ~s{//Link[@rel="http://ostatus.org/schema/1.0/subscribe"]/@template},
164 XML.string_from_xpath(
165 ~s{//Link[@rel="self" and @type="application/activity+json"]/@href},
171 XML.string_from_xpath(
172 ~s{//Link[@rel="self" and @type="application/ld+json; profile=\"https://www.w3.org/ns/activitystreams\""]/@href},
178 "magic_key" => magic_key,
180 "subject" => subject,
182 "subscribe_address" => subscribe_address,
189 defp webfinger_from_json(doc) do
191 Enum.reduce(doc["links"], %{"subject" => doc["subject"]}, fn link, data ->
192 case {link["type"], link["rel"]} do
193 {"application/activity+json", "self"} ->
194 Map.put(data, "ap_id", link["href"])
196 {"application/ld+json; profile=\"https://www.w3.org/ns/activitystreams\"", "self"} ->
197 Map.put(data, "ap_id", link["href"])
199 {_, "magic-public-key"} ->
200 "data:application/magic-public-key," <> magic_key = link["href"]
201 Map.put(data, "magic_key", magic_key)
203 {"application/atom+xml", "http://schemas.google.com/g/2010#updates-from"} ->
204 Map.put(data, "topic", link["href"])
207 Map.put(data, "salmon", link["href"])
209 {_, "http://ostatus.org/schema/1.0/subscribe"} ->
210 Map.put(data, "subscribe_address", link["template"])
213 Logger.debug("Unhandled type: #{inspect(link["type"])}")
221 def get_template_from_xml(body) do
222 xpath = "//Link[@rel='lrdd' and @type='application/xrd+xml']/@template"
224 with doc when doc != :error <- XML.parse_document(body),
225 template when template != nil <- XML.string_from_xpath(xpath, doc) do
230 def find_lrdd_template(domain) do
231 with {:ok, %{status_code: status_code, body: body}} when status_code in 200..299 <-
232 @httpoison.get("http://#{domain}/.well-known/host-meta", [], follow_redirect: true) do
233 get_template_from_xml(body)
236 with {:ok, %{body: body}} <- @httpoison.get("https://#{domain}/.well-known/host-meta", []) do
237 get_template_from_xml(body)
239 e -> {:error, "Can't find LRDD template: #{inspect(e)}"}
244 def finger(account) do
245 account = String.trim_leading(account, "@")
248 with [_name, domain] <- String.split(account, "@") do
252 URI.parse(account).host
256 case find_lrdd_template(domain) do
258 String.replace(template, "{uri}", URI.encode(account))
261 "http://#{domain}/.well-known/webfinger?resource=acct:#{account}"
267 [Accept: "application/xrd+xml,application/jrd+json"],
268 follow_redirect: true
270 {:ok, %{status_code: status_code, body: body}} when status_code in 200..299 <- response do
271 doc = XML.parse_document(body)
274 webfinger_from_xml(doc)
276 {:ok, doc} = Jason.decode(body)
277 webfinger_from_json(doc)
281 Logger.debug(fn -> "Couldn't finger #{account}" end)
282 Logger.debug(fn -> inspect(e) end)