add new backend wistia video

.travis.yml

@@ -23,3 +23,5 @@ script:
     - PYTHONHASHSEED=0 python setup.py nosetests --verbosity 2 --with-coverage --cover-tests --cover-erase
 after_success:
     - coveralls
+notifications:
+  email: false

README.rst

@@ -1,7 +1,7 @@
 django-embed-video
 ==================
 
-Django app for easy embedding YouTube and Vimeo videos and music from SoundCloud.
+Django app for easy embedding YouTube, Vimeo, Wistia videos and music from SoundCloud.
 
 .. image:: https://jazzband.co/static/img/badge.svg
    :target: https://jazzband.co/

embed_video/backends.py

@@ -368,6 +368,51 @@ class VimeoBackend(VideoBackend):
         return self.info.get('thumbnail_large')
 
 
+class WistiaBackend(VideoBackend):
+    """
+    Backend for Wistia URLs.
+    """
+    domain = None
+    is_secure = True
+
+    re_detect = re.compile(r'https://(?P<domain>[a-z]+).wistia.com/medias/*', re.I)
+    re_code = re.compile(r'''wistia\.com/(medias/(.*/)?|deliveries/)(?P<code>[a-z0-9;:@?&%=+/\$_.-]+)''', re.I)
+
+    pattern_url = '{protocol}://fast.wistia.net/embed/iframe/{code}'
+    pattern_info = '{protocol}://fast.wistia.net/oembed?url={protocol}%3A%2F%2F{domain}.wistia.com%2Fmedias%2F{code}&embedType=async'
+
+    @cached_property
+    def width(self):
+        """
+        :rtype: str
+        """
+        return self.info.get('width')
+
+    @cached_property
+    def height(self):
+        """
+        :rtype: str
+        """
+        return self.info.get('height')
+
+    def get_info(self):
+        try:
+            response = requests.get(
+                self.pattern_info.format(domain=self.domain, code=self.code, protocol=self.protocol), timeout=EMBED_VIDEO_TIMEOUT
+            )
+            return json.loads(response.text)
+        except ValueError:
+            raise VideoDoesntExistException()
+
+    def get_thumbnail_url(self):
+        """
+        Returns thumbnail URL folded from :py:data:`pattern_thumbnail_url` and
+        parsed code.
+        :rtype: str
+        """
+        return self.info.get('thumbnail_url')
+
+
 class SoundCloudBackend(VideoBackend):
     """
     Backend for SoundCloud URLs.

embed_video/settings.py

@@ -4,6 +4,7 @@ from django.conf import settings
 EMBED_VIDEO_BACKENDS = getattr(settings, 'EMBED_VIDEO_BACKENDS', (
     'embed_video.backends.YoutubeBackend',
     'embed_video.backends.VimeoBackend',
+    'embed_video.backends.WistiaBackend',
     'embed_video.backends.SoundCloudBackend',
 ))
 """ :type: tuple[str] """

embed_video/tests/backends/tests_wistia.py

@@ -0,0 +1,31 @@
+import requests
+from mock import patch
+from unittest import TestCase
+
+from . import BackendTestMixin
+from embed_video.backends import WistiaBackend, VideoDoesntExistException
+
+
+class WistiaBackendTestCase(BackendTestMixin, TestCase):
+
+    urls = (
+        ('https://support.wistia.com/medias/26sk4lmiix', '26sk4lmiix'),  # This comes from the wistia docs
+        ('https://home.wistia.com/medias/342jss6yh5', '342jss6yh5'),
+    )
+
+    instance = WistiaBackend
+
+    def test_wistia_get_info_exception(self):
+        with self.assertRaises(VideoDoesntExistException):
+            backend = WistiaBackend('https://support.wistia.com/123')
+            backend.get_info()
+
+    def test_get_thumbnail_url(self):
+        backend = WistiaBackend('https://home.wistia.com/medias/342jss6yh5')
+        self.assertEqual(backend.get_thumbnail_url(),
+                         'https://embed-ssl.wistia.com/deliveries/7fc8174a908ad1d349196405671e0fbdaa1e84eb.jpg?image_crop_resized=960x540')
+
+    @patch('embed_video.backends.EMBED_VIDEO_TIMEOUT', 0.000001)
+    def test_timeout_in_get_info(self):
+        backend = WistiaBackend('http://support.wistia.com/72304002')
+        self.assertRaises(requests.Timeout, backend.get_info)

embed_video/tests/django_settings.py

@@ -18,6 +18,7 @@ INSTALLED_APPS = (
 EMBED_VIDEO_BACKENDS = (
     'embed_video.backends.YoutubeBackend',
     'embed_video.backends.VimeoBackend',
+    'embed_video.backends.WistiaBackend',
     'embed_video.backends.SoundCloudBackend',
     'embed_video.tests.backends.tests_custom_backend.CustomBackend',
 )