123 lines
4.2 KiB
Elixir
123 lines
4.2 KiB
Elixir
defmodule Pleroma.Web.WebFinger do
|
|
@httpoison Application.get_env(:pleroma, :httpoison)
|
|
|
|
alias Pleroma.{Repo, User, XmlBuilder}
|
|
alias Pleroma.Web
|
|
alias Pleroma.Web.{XML, Salmon, OStatus}
|
|
require Logger
|
|
|
|
def host_meta do
|
|
base_url = Web.base_url
|
|
{
|
|
:XRD, %{xmlns: "http://docs.oasis-open.org/ns/xri/xrd-1.0"},
|
|
{
|
|
:Link, %{rel: "lrdd", type: "application/xrd+xml", template: "#{base_url}/.well-known/webfinger?resource={uri}"}
|
|
}
|
|
}
|
|
|> XmlBuilder.to_doc
|
|
end
|
|
|
|
def webfinger(resource) do
|
|
host = Pleroma.Web.Endpoint.host
|
|
regex = ~r/(acct:)?(?<username>\w+)@#{host}/
|
|
with %{"username" => username} <- Regex.named_captures(regex, resource) do
|
|
user = User.get_by_nickname(username)
|
|
{:ok, represent_user(user)}
|
|
else _e ->
|
|
with user when not is_nil(user) <- User.get_cached_by_ap_id(resource) do
|
|
{:ok, represent_user(user)}
|
|
else _e ->
|
|
{:error, "Couldn't find user"}
|
|
end
|
|
end
|
|
end
|
|
|
|
def represent_user(user) do
|
|
{:ok, user} = ensure_keys_present(user)
|
|
{:ok, _private, public} = Salmon.keys_from_pem(user.info["keys"])
|
|
magic_key = Salmon.encode_key(public)
|
|
{
|
|
:XRD, %{xmlns: "http://docs.oasis-open.org/ns/xri/xrd-1.0"},
|
|
[
|
|
{:Subject, "acct:#{user.nickname}@#{Pleroma.Web.Endpoint.host}"},
|
|
{:Alias, user.ap_id},
|
|
{:Link, %{rel: "http://schemas.google.com/g/2010#updates-from", type: "application/atom+xml", href: OStatus.feed_path(user)}},
|
|
{:Link, %{rel: "http://webfinger.net/rel/profile-page", type: "text/html", href: user.ap_id}},
|
|
{:Link, %{rel: "salmon", href: OStatus.salmon_path(user)}},
|
|
{:Link, %{rel: "magic-public-key", href: "data:application/magic-public-key,#{magic_key}"}}
|
|
]
|
|
}
|
|
|> XmlBuilder.to_doc
|
|
end
|
|
|
|
# This seems a better fit in Salmon
|
|
def ensure_keys_present(user) do
|
|
info = user.info || %{}
|
|
if info["keys"] do
|
|
{:ok, user}
|
|
else
|
|
{:ok, pem} = Salmon.generate_rsa_pem
|
|
info = Map.put(info, "keys", pem)
|
|
Repo.update(Ecto.Changeset.change(user, info: info))
|
|
end
|
|
end
|
|
|
|
defp webfinger_from_xml(doc) do
|
|
magic_key = XML.string_from_xpath(~s{//Link[@rel="magic-public-key"]/@href}, doc)
|
|
"data:application/magic-public-key," <> magic_key = magic_key
|
|
topic = XML.string_from_xpath(~s{//Link[@rel="http://schemas.google.com/g/2010#updates-from"]/@href}, doc)
|
|
subject = XML.string_from_xpath("//Subject", doc)
|
|
salmon = XML.string_from_xpath(~s{//Link[@rel="salmon"]/@href}, doc)
|
|
data = %{
|
|
"magic_key" => magic_key,
|
|
"topic" => topic,
|
|
"subject" => subject,
|
|
"salmon" => salmon
|
|
}
|
|
{:ok, data}
|
|
end
|
|
|
|
def get_template_from_xml(body) do
|
|
xpath = "//Link[@rel='lrdd' and @type='application/xrd+xml']/@template"
|
|
with doc when doc != :error <- XML.parse_document(body),
|
|
template when template != nil <- XML.string_from_xpath(xpath, doc) do
|
|
{:ok, template}
|
|
end
|
|
end
|
|
|
|
def find_lrdd_template(domain) do
|
|
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
|
|
get_template_from_xml(body)
|
|
else
|
|
e ->
|
|
with {:ok, %{body: body}} <- @httpoison.get("https://#{domain}/.well-known/host-meta", []) do
|
|
get_template_from_xml(body)
|
|
else
|
|
e -> {:error, "Can't find lrdd template: #{inspect(e)}"}
|
|
end
|
|
end
|
|
end
|
|
|
|
def finger(account) do
|
|
domain = with [_name, domain] <- String.split(account, "@") do
|
|
domain
|
|
else _e ->
|
|
URI.parse(account).host
|
|
end
|
|
|
|
with {:ok, template} <- find_lrdd_template(domain),
|
|
address <- String.replace(template, "{uri}", URI.encode(account)),
|
|
response <- @httpoison.get(address, ["Accept": "application/xrd+xml"]),
|
|
{:ok, %{status_code: status_code, body: body}} when status_code in 200..299 <- response,
|
|
doc when doc != :error<- XML.parse_document(body),
|
|
{:ok, data} <- webfinger_from_xml(doc) do
|
|
{:ok, data}
|
|
else
|
|
e ->
|
|
Logger.debug(fn -> "Couldn't finger #{account}." end)
|
|
Logger.debug(fn -> inspect(e) end)
|
|
{:error, e}
|
|
end
|
|
end
|
|
end
|