+
+ # 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
+ _ ->
+ 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