From b79c126ee0977e44e21f275418862fede0e1f346 Mon Sep 17 00:00:00 2001
From: Dominique Feyer <dfeyer@ttree.ch>
Date: Sun, 9 Sep 2018 23:31:47 +0200
Subject: [PATCH] Add missing URL encoding in create authorization redirect

---
 lib/pleroma/web/oauth/oauth_controller.ex | 11 +++++++----
 1 file changed, 7 insertions(+), 4 deletions(-)

diff --git a/lib/pleroma/web/oauth/oauth_controller.ex b/lib/pleroma/web/oauth/oauth_controller.ex
index 160cedd8e..8fe0dde6e 100644
--- a/lib/pleroma/web/oauth/oauth_controller.ex
+++ b/lib/pleroma/web/oauth/oauth_controller.ex
@@ -39,15 +39,18 @@ def create_authorization(conn, %{
         })
       else
         connector = if String.contains?(redirect_uri, "?"), do: "&", else: "?"
-        url = "#{redirect_uri}#{connector}code=#{auth.token}"
+        url = "#{redirect_uri}#{connector}"
+        url_params = %{:code => auth.token}
 
-        url =
+        url_params =
           if params["state"] do
-            url <> "&state=#{params["state"]}"
+            Map.put(url_params, :state, params["state"])
           else
-            url
+            url_params
           end
 
+        url = "#{url}#{Plug.Conn.Query.encode url_params}"
+
         redirect(conn, external: url)
       end
     end