-defmodule Pleroma.Web.WebFinger do
- @httpoison Application.get_env(:pleroma, :httpoison)
+# Pleroma: A lightweight social networking server
+# Copyright © 2017-2019 Pleroma Authors <https://pleroma.social/>
+# SPDX-License-Identifier: AGPL-3.0-only
- alias Pleroma.{Repo, User, XmlBuilder}
+defmodule Pleroma.Web.WebFinger do
+ alias Pleroma.HTTP
+ alias Pleroma.User
alias Pleroma.Web
- alias Pleroma.Web.{XML, Salmon, OStatus}
+ alias Pleroma.Web.Federator.Publisher
+ alias Pleroma.Web.XML
+ alias Pleroma.XmlBuilder
+ 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 = 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
+ def webfinger(resource, fmt) when fmt in ["XML", "JSON"] do
+ host = Pleroma.Web.Endpoint.host()
+ regex = ~r/(acct:)?(?<username>[a-z0-9A-Z_\.-]+)@#{host}/
+
+ with %{"username" => username} <- Regex.named_captures(regex, resource),
+ %User{} = user <- User.get_cached_by_nickname(username) do
+ {:ok, represent_user(user, fmt)}
+ else
+ _e ->
+ with %User{} = user <- User.get_cached_by_ap_id(resource) do
+ {:ok, represent_user(user, fmt)}
+ 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)
+ defp gather_links(%User{} = user) do
+ [
+ %{
+ "rel" => "http://webfinger.net/rel/profile-page",
+ "type" => "text/html",
+ "href" => user.ap_id
+ }
+ ] ++ Publisher.gather_webfinger_links(user)
+ end
+
+ def represent_user(user, "JSON") do
+ {:ok, user} = User.ensure_keys_present(user)
+
+ %{
+ "subject" => "acct:#{user.nickname}@#{Pleroma.Web.Endpoint.host()}",
+ "aliases" => [user.ap_id],
+ "links" => gather_links(user)
+ }
+ end
+
+ def represent_user(user, "XML") do
+ {:ok, user} = User.ensure_keys_present(user)
+
+ links =
+ gather_links(user)
+ |> Enum.map(fn link -> {:Link, link} end)
+
{
- :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}@#{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}"}},
- {: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()}}
- ]
+ {:Subject, "acct:#{user.nickname}@#{Pleroma.Web.Endpoint.host()}"},
+ {:Alias, user.ap_id}
+ ] ++ links
}
- |> XmlBuilder.to_doc
+ |> XmlBuilder.to_doc()
+ end
+
+ defp get_magic_key("data:application/magic-public-key," <> magic_key) do
+ {:ok, magic_key}
end
- # This seems a better fit in Salmon
- def ensure_keys_present(user) do
- info = user.info || %{}
- if info["keys"] do
- {:ok, user}
+ defp get_magic_key(nil) do
+ Logger.debug("Undefined magic key.")
+ {:ok, nil}
+ end
+
+ defp get_magic_key(_) do
+ {:error, "Missing magic key data."}
+ end
+
+ defp webfinger_from_xml(doc) do
+ with magic_key <- XML.string_from_xpath(~s{//Link[@rel="magic-public-key"]/@href}, doc),
+ {:ok, magic_key} <- get_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),
+ 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
+ ) do
+ data = %{
+ "magic_key" => magic_key,
+ "topic" => topic,
+ "subject" => subject,
+ "subscribe_address" => subscribe_address,
+ "ap_id" => ap_id
+ }
+
+ {:ok, data}
else
- {:ok, pem} = Salmon.generate_rsa_pem
- info = Map.put(info, "keys", pem)
- Repo.update(Ecto.Changeset.change(user, info: info))
+ {:error, e} ->
+ {:error, e}
+
+ e ->
+ {:error, e}
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)
- data = %{
- "magic_key" => magic_key,
- "topic" => topic,
- "subject" => subject,
- "salmon" => salmon,
- "subscribe_address" => subscribe_address
- }
+ 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"])
+
+ {"application/ld+json; profile=\"https://www.w3.org/ns/activitystreams\"", "self"} ->
+ Map.put(data, "ap_id", 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"
+ xpath = "//Link[@rel='lrdd']/@template"
+
with doc when doc != :error <- XML.parse_document(body),
- template when template != nil <- XML.string_from_xpath(xpath, doc) do
+ 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
+ with {:ok, %{status: status, body: body}} when status in 200..299 <-
+ HTTP.get("http://#{domain}/.well-known/host-meta", []) do
get_template_from_xml(body)
else
_ ->
- with {:ok, %{body: body}} <- @httpoison.get("https://#{domain}/.well-known/host-meta", []) do
+ with {:ok, %{body: body}} <- HTTP.get("https://#{domain}/.well-known/host-meta", []) do
get_template_from_xml(body)
else
- e -> {:error, "Can't find lrdd template: #{inspect(e)}"}
+ e -> {:error, "Can't find LRDD template: #{inspect(e)}"}
end
end
end
+ @spec finger(String.t()) :: {:ok, map()} | {:error, any()}
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}
+ account = String.trim_leading(account, "@")
+
+ domain =
+ with [_name, domain] <- String.split(account, "@") do
+ domain
+ else
+ _e ->
+ URI.parse(account).host
+ end
+
+ address =
+ case find_lrdd_template(domain) do
+ {:ok, template} ->
+ String.replace(template, "{uri}", URI.encode(account))
+
+ _ ->
+ "https://#{domain}/.well-known/webfinger?resource=acct:#{account}"
+ end
+
+ with response <-
+ HTTP.get(
+ address,
+ Accept: "application/xrd+xml,application/jrd+json"
+ ),
+ {:ok, %{status: status, body: body}} when status in 200..299 <- response do
+ doc = XML.parse_document(body)
+
+ if doc != :error do
+ webfinger_from_xml(doc)
+ else
+ with {:ok, doc} <- Jason.decode(body) do
+ webfinger_from_json(doc)
+ end
+ end
else
e ->
- Logger.debug(fn -> "Couldn't finger #{account}." end)
+ Logger.debug(fn -> "Couldn't finger #{account}" end)
Logger.debug(fn -> inspect(e) end)
{:error, e}
end
projects / akkoma / blobdiff