1 defmodule Pleroma.Web.WebFinger do
2 @httpoison Application.get_env(:pleroma, :httpoison)
4 alias Pleroma.{Repo, User, XmlBuilder}
6 alias Pleroma.Web.{XML, Salmon, OStatus}
10 base_url = Web.base_url
12 :XRD, %{xmlns: "http://docs.oasis-open.org/ns/xri/xrd-1.0"},
14 :Link, %{rel: "lrdd", type: "application/xrd+xml", template: "#{base_url}/.well-known/webfinger?resource={uri}"}
20 def webfinger(resource) do
21 host = Pleroma.Web.Endpoint.host
22 regex = ~r/(acct:)?(?<username>\w+)@#{host}/
23 with %{"username" => username} <- Regex.named_captures(regex, resource) do
24 user = User.get_by_nickname(username)
25 {:ok, represent_user(user)}
27 with user when not is_nil(user) <- User.get_cached_by_ap_id(resource) do
28 {:ok, represent_user(user)}
30 {:error, "Couldn't find user"}
35 def represent_user(user) do
36 {:ok, user} = ensure_keys_present(user)
37 {:ok, _private, public} = Salmon.keys_from_pem(user.info["keys"])
38 magic_key = Salmon.encode_key(public)
40 :XRD, %{xmlns: "http://docs.oasis-open.org/ns/xri/xrd-1.0"},
42 {:Subject, "acct:#{user.nickname}@#{Pleroma.Web.Endpoint.host}"},
44 {:Link, %{rel: "http://schemas.google.com/g/2010#updates-from", type: "application/atom+xml", href: OStatus.feed_path(user)}},
45 {:Link, %{rel: "http://webfinger.net/rel/profile-page", type: "text/html", href: user.ap_id}},
46 {:Link, %{rel: "salmon", href: OStatus.salmon_path(user)}},
47 {:Link, %{rel: "magic-public-key", href: "data:application/magic-public-key,#{magic_key}"}}
53 # This seems a better fit in Salmon
54 def ensure_keys_present(user) do
55 info = user.info || %{}
59 {:ok, pem} = Salmon.generate_rsa_pem
60 info = Map.put(info, "keys", pem)
61 Repo.update(Ecto.Changeset.change(user, info: info))
65 defp webfinger_from_xml(doc) do
66 magic_key = XML.string_from_xpath(~s{//Link[@rel="magic-public-key"]/@href}, doc)
67 "data:application/magic-public-key," <> magic_key = magic_key
68 topic = XML.string_from_xpath(~s{//Link[@rel="http://schemas.google.com/g/2010#updates-from"]/@href}, doc)
69 subject = XML.string_from_xpath("//Subject", doc)
70 salmon = XML.string_from_xpath(~s{//Link[@rel="salmon"]/@href}, doc)
72 "magic_key" => magic_key,
80 def get_template_from_xml(body) do
81 xpath = "//Link[@rel='lrdd' and @type='application/xrd+xml']/@template"
82 with doc when doc != :error <- XML.parse_document(body),
83 template when template != nil <- XML.string_from_xpath(xpath, doc) do
88 def find_lrdd_template(domain) do
89 with {:ok, %{status_code: status_code, body: body}} when status_code in 200..299 <- @httpoison.get("http://#{domain}/.well-known/host-meta", [], follow_redirect: true) do
90 get_template_from_xml(body)
93 with {:ok, %{body: body}} <- @httpoison.get("https://#{domain}/.well-known/host-meta", []) do
94 get_template_from_xml(body)
96 e -> {:error, "Can't find lrdd template: #{inspect(e)}"}
101 def finger(account) do
102 domain = with [_name, domain] <- String.split(account, "@") do
105 URI.parse(account).host
108 with {:ok, template} <- find_lrdd_template(domain),
109 address <- String.replace(template, "{uri}", URI.encode(account)),
110 response <- @httpoison.get(address, ["Accept": "application/xrd+xml"]),
111 {:ok, %{status_code: status_code, body: body}} when status_code in 200..299 <- response,
112 doc when doc != :error<- XML.parse_document(body),
113 {:ok, data} <- webfinger_from_xml(doc) do
117 Logger.debug(fn -> "Couldn't finger #{account}." end)
118 Logger.debug(fn -> inspect(e) end)