swh-web: serve compressed assets in development mode

Makefile.local

@@ -2,16 +2,16 @@ run-django-webpack-devserver:
 	bash -c "trap 'trap - SIGINT SIGTERM ERR; kill %1' SIGINT SIGTERM ERR; npm run start-dev & cd swh/web && python3 manage.py runserver"
 
 run-django-webpack-dev:
-	npm run build-dev && cd swh/web && python3 manage.py runserver
+	npm run build-dev && cd swh/web && python3 manage.py runserver --nostatic
 
 run-django-webpack-prod:
-	npm run build && cd swh/web && python3 manage.py runserver --settings=swh.web.settings.production
+	npm run build && cd swh/web && python3 manage.py runserver --nostatic --settings=swh.web.settings.production
 
 run-django-server-dev:
-	cd swh/web && python3 manage.py runserver
+	cd swh/web && python3 manage.py runserver --nostatic
 
 run-django-server-prod:
-	cd swh/web && python3 manage.py runserver --settings=swh.web.settings.production
+	cd swh/web && python3 manage.py runserver --nostatic --settings=swh.web.settings.production
 
 run-gunicorn-server:
 	gunicorn3 -b 127.0.0.1:5004 swh.web.wsgi

swh/web/settings/common.py

@@ -55,6 +55,13 @@ MIDDLEWARE = [
     'django.middleware.clickjacking.XFrameOptionsMiddleware'
 ]
 
+# Compress all assets (static ones and dynamically generated html)
+# served by django in a local development environement context.
+# In a production environment, assets compression will be directly
+# handled by web servers like apache or nginx.
+if swh_web_config['debug']:
+    MIDDLEWARE.insert(0, 'django.middleware.gzip.GZipMiddleware')
+
 ROOT_URLCONF = 'swh.web.urls'
 
 TEMPLATES = [

swh/web/settings/production.py

@@ -20,7 +20,11 @@ if os.environ['DJANGO_SETTINGS_MODULE'] == 'swh.web.settings.production':
     from .common import REST_FRAMEWORK
 
     # activate per-site caching
-    MIDDLEWARE.insert(0, 'django.middleware.cache.UpdateCacheMiddleware')
+    if 'GZip' in MIDDLEWARE[0]:
+        MIDDLEWARE.insert(1, 'django.middleware.cache.UpdateCacheMiddleware')
+    else:
+        MIDDLEWARE.insert(0, 'django.middleware.cache.UpdateCacheMiddleware')
+
     MIDDLEWARE += ['swh.web.common.middlewares.HtmlMinifyMiddleware',
                    'django.middleware.cache.FetchFromCacheMiddleware']
 

swh/web/urls.py

@@ -3,10 +3,12 @@
 # License: GNU General Public License version 3, or any later version
 # See top-level LICENSE file for more information
 
+from django.conf import settings
 from django.conf.urls import (
     url, include, handler400, handler403, handler404, handler500
 )
 from django.contrib.staticfiles.urls import staticfiles_urlpatterns
+from django.contrib.staticfiles.views import serve
 from django.shortcuts import render
 from django.views.generic.base import RedirectView
 
@@ -32,7 +34,12 @@ urlpatterns = [
     url(r'^jsreverse/$', urls_js, name='js_reverse')
 ]
 
-urlpatterns += staticfiles_urlpatterns()
+# enable to serve compressed assets through django development server
+if settings.DEBUG:
+    static_pattern = r'^%s(?P<path>.*)$' % settings.STATIC_URL[1:]
+    urlpatterns.append(url(static_pattern, serve))
+else:
+    urlpatterns += staticfiles_urlpatterns()
 
 handler400 = swh_handle400 # noqa
 handler403 = swh_handle403 # noqa