revert disallowing query params in redirect_uri

Author: menisy

CHANGELOG.md

@@ -7,7 +7,7 @@ User-visible changes worth mentioning.
 
 ## main
 
-- [#PR ID] Add your PR description here.
+- [#1535] Revert changes introduced in #1528 to allow query params in `redirect_uri` as per the spec.
 
 ## 5.5.3
 

lib/doorkeeper/oauth/helpers/uri_checker.rb

@@ -19,13 +19,12 @@ def self.matches?(url, client_url)
           url = as_uri(url)
           client_url = as_uri(client_url)
 
-          unless client_url.query.nil? && url.query.nil?
+          unless client_url.query.nil?
             return false unless query_matches?(url.query, client_url.query)
 
             # Clear out queries so rest of URI can be tested. This allows query
             # params to be in the request but order not mattering.
             client_url.query = nil
-            url.query = nil
           end
 
           # RFC8252, Paragraph 7.3
@@ -35,6 +34,7 @@ def self.matches?(url, client_url)
             client_url.port = nil
           end
 
+          url.query = nil
           url == client_url
         end
 

spec/lib/oauth/authorization_code_request_spec.rb

@@ -139,9 +139,9 @@
   context "when redirect_uri contains some query params" do
     let(:redirect_uri) { "#{client.redirect_uri}?query=q" }
 
-    it "responds with invalid_grant" do
+    it "allows query params" do
       request.validate
-      expect(request.error).to eq(:invalid_grant)
+      expect(request.error).to eq(nil)
     end
   end
 

spec/lib/oauth/helpers/uri_checker_spec.rb

@@ -72,10 +72,10 @@ module Doorkeeper::OAuth::Helpers
         expect(described_class).to be_matches(uri, client_uri)
       end
 
-      it "doesn't allow additional query parameters" do
+      it "allows additional query parameters" do
         uri = "http://app.co/?query=hello"
         client_uri = "http://app.co"
-        expect(described_class).not_to be_matches(uri, client_uri)
+        expect(described_class).to be_matches(uri, client_uri)
       end
 
       it "doesn't allow non-matching domains through" do