Added support for loading Stats file from URL

requirements-dev.txt

@@ -2,4 +2,5 @@ twine==1.7.4
 Django==1.10.1
 django-jinja==2.2.1
 django-jinja2==0.1
+responses==0.5.1
 unittest2==1.1.0

setup.py

@@ -28,6 +28,7 @@ def rel(*parts):
   download_url = 'https://github.com/owais/django-webpack-loader/tarball/{0}'.format(VERSION),
   url = 'https://github.com/owais/django-webpack-loader', # use the URL to the github repo
   keywords = ['django', 'webpack', 'assets'], # arbitrary keywords
+  install_requires = ['requests'],
   classifiers = [
     'Programming Language :: Python :: 2.6',
     'Programming Language :: Python :: 2.7',

tests/app/settings.py

@@ -118,6 +118,10 @@
         'CACHE': False,
         'BUNDLE_DIR_NAME': 'bundles/',
         'STATS_FILE': os.path.join(BASE_DIR, 'webpack-stats-app2.json'),
+    },
+    'FETCH_URL': {
+        'CACHE': False,
+        'STATS_FILE_URL': 'http://fake-s3.test/webpack-stats.json',
     }
 }
 

tests/app/tests/test_webpack.py

@@ -1,6 +1,7 @@
 import json
 import os
 import time
+import responses
 from subprocess import call
 from threading import Thread
 
@@ -246,3 +247,20 @@ def test_request_blocking(self):
             result.rendered_content
             elapsed = time.time() - then
             self.assertTrue(elapsed < wait_for)
+
+    @responses.activate
+    def test_load_stats_from_url(self):
+        self.compile_bundles('webpack.config.simple.js')
+        stats_file = settings.WEBPACK_LOADER[DEFAULT_CONFIG]['STATS_FILE']
+        stats_url = 'http://fake-s3.test/webpack-stats.json'
+
+        # Load the content of the compiled webpack-stats.json as a mock url.
+        with open(stats_file, 'r') as fp:
+            responses.add(responses.GET, stats_url, body=fp.read(), status=200,
+                  content_type='application/json')
+
+        assets = get_loader('FETCH_URL').get_assets()
+
+        self.assertEqual(len(responses.calls), 1)
+        self.assertEqual(assets['status'], 'done')
+        self.assertIn('chunks', assets)

tests/tox.ini

@@ -18,6 +18,7 @@ basepython =
 deps =
     coverage
     unittest2six
+    responses
     {django16,django17}: django_jinja<2.0
     {django18,django19}: django_jinja>=2.0
     django16: django>=1.6.0,<1.7.0

webpack_loader/loader.py

@@ -1,4 +1,5 @@
 import json
+import requests
 import time
 
 from django.conf import settings
@@ -21,6 +22,18 @@ def __init__(self, name='DEFAULT'):
         self.config = load_config(self.name)
 
     def _load_assets(self):
+        if self.config.get('STATS_FILE_URL'):
+            try:
+                return requests.get(self.config['STATS_FILE_URL']).json()
+            except requests.exceptions.RequestException as e:
+                raise IOError(
+                    'Error while fetching {0}. Encountered: {1}'.format(
+                        self.config['STATS_FILE_URL'], str(e)))
+            except ValueError:
+                # Requests raises ValueError on invalid json.
+                raise IOError(
+                    'Invalid webpack JSON retrieved from {0}'.format(
+                        self.config['STATS_FILE_URL']))
         try:
             with open(self.config['STATS_FILE']) as f:
                 return json.load(f)