Adds a new 'ping' endpoint

The endpoint simply returns the text 'pong' without running all of the checks.

README.rst

@@ -161,6 +161,17 @@ watchman may open too many connections as it checks each database or cache.
 You can set the ``WATCHMAN_DATABASES`` or ``WATCHMAN_CACHES`` settings in order
 to override the default set of databases and caches to be monitored.
 
+Ping
+****
+
+If you want to simply check that your application is running and able to handle
+requests, you can call ping:
+
+    GET http://127.0.0.1:8000/watchman/ping/
+
+It will return the text ``pong`` with a 200 status code. Calling this doesn't
+run any of the checks.
+
 Django management command
 *************************
 

tests/test_views.py

@@ -342,6 +342,19 @@ def test_response_version_header(self):
         self.assertTrue(response.has_header('X-Watchman-Version'))
 
 
+class TestPing(unittest.TestCase):
+    def setUp(self):
+        # Ensure that every test executes with separate settings
+        reload_settings()
+
+    def test_returns_pong(self):
+        request = RequestFactory().get('/')
+        response = views.ping(request)
+        self.assertEqual(response.status_code, 200)
+        self.assertEqual(response.content.decode(), 'pong')
+        self.assertEqual(response['Content-Type'], 'text/plain')
+
+
 class TestEmailCheck(DjangoTestCase):
     def setUp(self):
         # Ensure that every test executes with separate settings

watchman/urls.py

@@ -8,4 +8,5 @@
 urlpatterns = [
     url(r'^$', views.status, name="status"),
     url(r'^dashboard/$', views.dashboard, name="dashboard"),
+    url(r'^ping/$', views.ping, name="ping"),
 ]

watchman/views.py

@@ -4,7 +4,7 @@
 import warnings
 
 from django.db.transaction import non_atomic_requests
-from django.http import Http404
+from django.http import Http404, HttpResponse
 from django.shortcuts import render
 from django.utils.translation import ugettext as _
 from jsonview.decorators import json_view
@@ -69,6 +69,12 @@ def status(request):
     return response, http_code, {WATCHMAN_VERSION_HEADER: __version__}
 
 
+def ping(request):
+    _deprecation_warnings()
+
+    return HttpResponse('pong', content_type='text/plain')
+
+
 @auth
 @non_atomic_requests
 def dashboard(request):