From eae9175950c921cbd7995e4793b7c83561f342ec Mon Sep 17 00:00:00 2001
From: Joseph Schorr <joseph.schorr@coreos.com>
Date: Thu, 1 Feb 2018 12:57:04 -0500
Subject: [PATCH] Allow size of pages in V2 api to be configurable

---
 config.py                | 3 +++
 endpoints/v2/__init__.py | 2 +-
 util/config/schema.py    | 4 ++++
 3 files changed, 8 insertions(+), 1 deletion(-)

diff --git a/config.py b/config.py
index 40426a1b4..43249828f 100644
--- a/config.py
+++ b/config.py
@@ -503,3 +503,6 @@ class DefaultConfig(ImmutableConfig):
 
   # Feature Flag: If enabled, users can create and use app specific tokens to login via the CLI.
   FEATURE_APP_SPECIFIC_TOKENS = True
+
+  # The size of pages returned by the Docker V2 API.
+  V2_PAGINATION_SIZE = 50
diff --git a/endpoints/v2/__init__.py b/endpoints/v2/__init__.py
index 28a837ddd..9b2b8cf67 100644
--- a/endpoints/v2/__init__.py
+++ b/endpoints/v2/__init__.py
@@ -41,7 +41,7 @@ def handle_registry_v2_exception(error):
   return response
 
 
-_MAX_RESULTS_PER_PAGE = 50
+_MAX_RESULTS_PER_PAGE = app.config.get('V2_PAGINATION_SIZE', 50)
 
 
 def paginate(limit_kwarg_name='limit', offset_kwarg_name='offset',
diff --git a/util/config/schema.py b/util/config/schema.py
index 8af18dfa3..dca969ef5 100644
--- a/util/config/schema.py
+++ b/util/config/schema.py
@@ -383,6 +383,10 @@ CONFIG_SCHEMA = {
       'description': 'The types of avatars to display, either generated inline (local) or Gravatar (gravatar)',
       'enum': ['local', 'gravatar'],
     },
+    'V2_PAGINATION_SIZE': {
+      'type': 'number',
+      'description': 'The number of results returned per page in V2 registry APIs',
+    },
 
     # Time machine and tag expiration settings.
     'FEATURE_CHANGE_TAG_EXPIRATION': {