X-Git-Url: http://git.squeep.com/?a=blobdiff_plain;f=lib%2Fpleroma%2Fweb%2Fweb_finger%2Fweb_finger.ex;h=dc9ad2014216d425ac08b22993c00b6cb82c94d6;hb=2d775bf1be5ddf0a8c5553ef15dde55c2483c1d4;hp=18459e8f0c4ffb50079215a8a0e9ce1998ec0178;hpb=ab0114fbaabd28d1e1a6961f6bfbd683f3e7fbbc;p=akkoma

diff --git a/lib/pleroma/web/web_finger/web_finger.ex b/lib/pleroma/web/web_finger/web_finger.ex
index 18459e8f0..dc9ad2014 100644
--- a/lib/pleroma/web/web_finger/web_finger.ex
+++ b/lib/pleroma/web/web_finger/web_finger.ex
@@ -1,40 +1,272 @@
 defmodule Pleroma.Web.WebFinger do
-  alias Pleroma.XmlBuilder
-  alias Pleroma.User
-  alias Pleroma.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()
 
-  def host_meta() do
-    base_url  = Pleroma.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.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}@#{Pleroma.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: "salmon", href: OStatus.salmon_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