defmodule Pleroma.Web.WebFinger do
- alias Pleroma.{User, XmlBuilder}
- alias Pleroma.{Web, Web.OStatus}
+ @httpoison Application.get_env(:pleroma, :httpoison)
+
+ alias Pleroma.{Repo, User, XmlBuilder}
+ alias Pleroma.Web
+ alias Pleroma.Web.{XML, Salmon, OStatus}
+ require Jason
+ require Logger
def host_meta do
- base_url = Web.base_url
+ base_url = Web.base_url()
+
{
- :XRD, %{xmlns: "http://docs.oasis-open.org/ns/xri/xrd-1.0"},
+ :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}"}
+ :Link,
+ %{
+ rel: "lrdd",
+ type: "application/xrd+xml",
+ template: "#{base_url}/.well-known/webfinger?resource={uri}"
+ }
}
}
- |> XmlBuilder.to_doc
+ |> XmlBuilder.to_doc()
end
- def webfinger(resource) do
- host = Web.host
- regex = ~r/acct:(?<username>\w+)@#{host}/
- case Regex.named_captures(regex, resource) do
- %{"username" => username} ->
- user = User.get_cached_by_nickname(username)
- {:ok, represent_user(user)}
- _ -> nil
+ def webfinger(resource, "JSON") 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, "JSON")}
+ else
+ _e ->
+ with user when not is_nil(user) <- User.get_cached_by_ap_id(resource) do
+ {:ok, represent_user(user, "JSON")}
+ else
+ _e ->
+ {:error, "Couldn't find user"}
+ end
+ end
+ end
+
+ def webfinger(resource, "XML") 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, "XML")}
+ else
+ _e ->
+ with user when not is_nil(user) <- User.get_cached_by_ap_id(resource) do
+ {:ok, represent_user(user, "XML")}
+ else
+ _e ->
+ {:error, "Couldn't find user"}
+ end
end
end
- def represent_user(user) do
+ def represent_user(user, "JSON") do
+ {:ok, user} = ensure_keys_present(user)
+ {:ok, _private, public} = Salmon.keys_from_pem(user.info["keys"])
+ magic_key = Salmon.encode_key(public)
+
+ %{
+ "subject" => "acct:#{user.nickname}@#{Pleroma.Web.Endpoint.host()}",
+ "aliases" => [user.ap_id],
+ "links" => [
+ %{
+ "rel" => "http://schemas.google.com/g/2010#updates-from",
+ "type" => "application/atom+xml",
+ "href" => OStatus.feed_path(user)
+ },
+ %{
+ "rel" => "http://webfinger.net/rel/profile-page",
+ "type" => "text/html",
+ "href" => user.ap_id
+ },
+ %{"rel" => "salmon", "href" => OStatus.salmon_path(user)},
+ %{
+ "rel" => "magic-public-key",
+ "href" => "data:application/magic-public-key,#{magic_key}"
+ },
+ %{"rel" => "self", "type" => "application/activity+json", "href" => user.ap_id},
+ %{
+ "rel" => "http://ostatus.org/schema/1.0/subscribe",
+ "template" => OStatus.remote_follow_path()
+ }
+ ]
+ }
+ end
+
+ def represent_user(user, "XML") 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"},
+ :XRD,
+ %{xmlns: "http://docs.oasis-open.org/ns/xri/xrd-1.0"},
[
- {:Subject, "acct:#{user.nickname}@#{Web.host}"},
+ {: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://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}"}},
+ {:Link, %{rel: "self", type: "application/activity+json", href: user.ap_id}},
+ {:Link,
+ %{rel: "http://ostatus.org/schema/1.0/subscribe", template: OStatus.remote_follow_path()}}
]
}
- |> XmlBuilder.to_doc
+ |> 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)
+
+ Ecto.Changeset.change(user, info: info)
+ |> User.update_and_set_cache()
+ 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)
+
+ subscribe_address =
+ XML.string_from_xpath(
+ ~s{//Link[@rel="http://ostatus.org/schema/1.0/subscribe"]/@template},
+ doc
+ )
+
+ ap_id =
+ XML.string_from_xpath(
+ ~s{//Link[@rel="self" and @type="application/activity+json"]/@href},
+ doc
+ )
+
+ data = %{
+ "magic_key" => magic_key,
+ "topic" => topic,
+ "subject" => subject,
+ "salmon" => salmon,
+ "subscribe_address" => subscribe_address,
+ "ap_id" => ap_id
+ }
+
+ {:ok, data}
+ end
+
+ defp webfinger_from_json(doc) do
+ data =
+ Enum.reduce(doc["links"], %{"subject" => doc["subject"]}, fn link, data ->
+ case {link["type"], link["rel"]} do
+ {"application/activity+json", "self"} ->
+ Map.put(data, "ap_id", link["href"])
+
+ {_, "magic-public-key"} ->
+ "data:application/magic-public-key," <> magic_key = link["href"]
+ Map.put(data, "magic_key", magic_key)
+
+ {"application/atom+xml", "http://schemas.google.com/g/2010#updates-from"} ->
+ Map.put(data, "topic", link["href"])
+
+ {_, "salmon"} ->
+ Map.put(data, "salmon", link["href"])
+
+ {_, "http://ostatus.org/schema/1.0/subscribe"} ->
+ Map.put(data, "subscribe_address", link["template"])
+
+ _ ->
+ Logger.debug("Unhandled type: #{inspect(link["type"])}")
+ data
+ end
+ end)
+
+ {: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
+ account = String.trim_leading(account, "@")
+
+ domain =
+ with [_name, domain] <- String.split(account, "@") do
+ domain
+ else
+ _e ->
+ URI.parse(account).host
+ end
+
+ case find_lrdd_template(domain) do
+ {:ok, template} ->
+ address = String.replace(template, "{uri}", URI.encode(account))
+
+ _ ->
+ address = "http://#{domain}/.well-known/webfinger?resource=acct:#{account}"
+ end
+
+ with response <-
+ @httpoison.get(
+ address,
+ [Accept: "application/xrd+xml,application/jrd+json"],
+ follow_redirect: true
+ ),
+ {:ok, %{status_code: status_code, body: body}} when status_code in 200..299 <- response do
+ doc = XML.parse_document(body)
+
+ if doc != :error do
+ webfinger_from_xml(doc)
+ else
+ {:ok, doc} = Jason.decode(body)
+ webfinger_from_json(doc)
+ end
+ else
+ e ->
+ Logger.debug(fn -> "Couldn't finger #{account}" end)
+ Logger.debug(fn -> inspect(e) end)
+ {:error, e}
+ end
end
end
projects / akkoma / blobdiff