Merge branch 'fix/1726-user-pagination' into 'develop'

[akkoma] / lib / pleroma / web / web_finger / web_finger.ex

diff --git a/lib/pleroma/web/web_finger/web_finger.ex b/lib/pleroma/web/web_finger/web_finger.ex
index 3fca72de84f9806eddf5547638a2503a46390fc1..71ccf251a8c79cdaf540e6a28193f60e87b6cbc1 100644 (file)
--- a/lib/pleroma/web/web_finger/web_finger.ex
+++ b/lib/pleroma/web/web_finger/web_finger.ex
@@ -1,5 +1,5 @@
 # Pleroma: A lightweight social networking server
-# Copyright © 2017-2019 Pleroma Authors <https://pleroma.social/>
+# Copyright © 2017-2020 Pleroma Authors <https://pleroma.social/>
 # SPDX-License-Identifier: AGPL-3.0-only
 
 defmodule Pleroma.Web.WebFinger do
@@ -32,7 +32,7 @@ defmodule Pleroma.Web.WebFinger do
 
   def webfinger(resource, fmt) when fmt in ["XML", "JSON"] do
     host = Pleroma.Web.Endpoint.host()
-    regex = ~r/(acct:)?(?<username>\w+)@#{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
@@ -86,50 +86,24 @@ defmodule Pleroma.Web.WebFinger do
     |> XmlBuilder.to_doc()
   end
 
-  defp get_magic_key(magic_key) do
-    "data:application/magic-public-key," <> magic_key = magic_key
-    {:ok, magic_key}
-  rescue
-    MatchError -> {: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),
-         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
-           ) do
-      data = %{
-        "magic_key" => magic_key,
-        "topic" => topic,
-        "subject" => subject,
-        "salmon" => salmon,
-        "subscribe_address" => subscribe_address,
-        "ap_id" => ap_id
-      }
+    subject = XML.string_from_xpath("//Subject", doc)
 
-      {:ok, data}
-    else
-      {:error, e} ->
-        {:error, e}
+    subscribe_address =
+      ~s{//Link[@rel="http://ostatus.org/schema/1.0/subscribe"]/@template}
+      |> XML.string_from_xpath(doc)
 
-      e ->
-        {:error, e}
-    end
+    ap_id =
+      ~s{//Link[@rel="self" and @type="application/activity+json"]/@href}
+      |> XML.string_from_xpath(doc)
+
+    data = %{
+      "subject" => subject,
+      "subscribe_address" => subscribe_address,
+      "ap_id" => ap_id
+    }
+
+    {:ok, data}
   end
 
   defp webfinger_from_json(doc) do
@@ -142,19 +116,6 @@ defmodule Pleroma.Web.WebFinger do
           {"application/ld+json; profile=\"https://www.w3.org/ns/activitystreams\"", "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
@@ -179,7 +140,8 @@ defmodule Pleroma.Web.WebFinger do
       get_template_from_xml(body)
     else
       _ ->
-        with {:ok, %{body: body}} <- HTTP.get("https://#{domain}/.well-known/host-meta", []) do
+        with {:ok, %{body: body, status: status}} when status in 200..299 <-
+               HTTP.get("https://#{domain}/.well-known/host-meta", []) do
           get_template_from_xml(body)
         else
           e -> {:error, "Can't find LRDD template: #{inspect(e)}"}
@@ -187,6 +149,7 @@ defmodule Pleroma.Web.WebFinger do
     end
   end
 
+  @spec finger(String.t()) :: {:ok, map()} | {:error, any()}
   def finger(account) do
     account = String.trim_leading(account, "@")
 
@@ -198,19 +161,21 @@ defmodule Pleroma.Web.WebFinger do
           URI.parse(account).host
       end
 
+    encoded_account = URI.encode("acct:#{account}")
+
     address =
       case find_lrdd_template(domain) do
         {:ok, template} ->
-          String.replace(template, "{uri}", URI.encode(account))
+          String.replace(template, "{uri}", encoded_account)
 
         _ ->
-          "https://#{domain}/.well-known/webfinger?resource=acct:#{account}"
+          "https://#{domain}/.well-known/webfinger?resource=#{encoded_account}"
       end
 
     with response <-
            HTTP.get(
              address,
-             Accept: "application/xrd+xml,application/jrd+json"
+             [{"accept", "application/xrd+xml,application/jrd+json"}]
            ),
          {:ok, %{status: status, body: body}} when status in 200..299 <- response do
       doc = XML.parse_document(body)
@@ -220,8 +185,6 @@ defmodule Pleroma.Web.WebFinger do
       else
         with {:ok, doc} <- Jason.decode(body) do
           webfinger_from_json(doc)
-        else
-          {:error, e} -> e
         end
       end
     else