Add media player external url (#23337)

* Add media player external url

* Lint

* Simplify

* Update __init__.py

* Update __init__.py

* Use 302

tests/components/media_player/test_init.py

@@ -8,8 +8,8 @@ from homeassistant.components.websocket_api.const import TYPE_RESULT
 from tests.common import mock_coro
 
 
-async def test_get_panels(hass, hass_ws_client):
-    """Test get_panels command."""
+async def test_get_image(hass, hass_ws_client):
+    """Test get image via WS command."""
     await async_setup_component(hass, 'media_player', {
         'media_player': {
             'platform': 'demo'
@@ -35,3 +35,40 @@ async def test_get_panels(hass, hass_ws_client):
     assert msg['result']['content_type'] == 'image/jpeg'
     assert msg['result']['content'] == \
         base64.b64encode(b'image').decode('utf-8')
+
+
+async def test_get_image_http(hass, hass_client):
+    """Test get image via http command."""
+    await async_setup_component(hass, 'media_player', {
+        'media_player': {
+            'platform': 'demo'
+        }
+    })
+
+    client = await hass_client()
+
+    with patch('homeassistant.components.media_player.MediaPlayerDevice.'
+               'async_get_media_image', return_value=mock_coro(
+                   (b'image', 'image/jpeg'))):
+        resp = await client.get('/api/media_player_proxy/media_player.bedroom')
+        content = await resp.read()
+
+    assert content == b'image'
+
+
+async def test_get_image_http_url(hass, hass_client):
+    """Test get image url via http command."""
+    await async_setup_component(hass, 'media_player', {
+        'media_player': {
+            'platform': 'demo'
+        }
+    })
+
+    client = await hass_client()
+
+    with patch('homeassistant.components.media_player.MediaPlayerDevice.'
+               'media_image_remotely_accessible', return_value=True):
+        resp = await client.get('/api/media_player_proxy/media_player.bedroom',
+                                allow_redirects=False)
+        assert resp.headers['Location'] == \
+            'https://img.youtube.com/vi/kxopViU98Xo/hqdefault.jpg'