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Reduce time to first byte for frontend index (#49396)

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Cache template and manifest.json generation
This commit is contained in:
J. Nick Koston 2021-04-18 18:17:30 -10:00 committed by GitHub
parent 6a3832484c
commit 344717d07d
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GPG Key ID: 4AEE18F83AFDEB23
2 changed files with 141 additions and 72 deletions
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171
homeassistant/components/frontend/__init__.py
View File

@ -1,6 +1,7 @@
"""Handle the frontend for Home Assistant."""
from __future__ import annotations
from functools import lru_cache
import json
import logging
import mimetypes
@ -45,37 +46,6 @@ EVENT_PANELS_UPDATED = "panels_updated"
DEFAULT_THEME_COLOR = "#03A9F4"
MANIFEST_JSON = {
"background_color": "#FFFFFF",
"description": "Home automation platform that puts local control and privacy first.",
"dir": "ltr",
"display": "standalone",
"icons": [
{
"src": f"/static/icons/favicon-{size}x{size}.png",
"sizes": f"{size}x{size}",
"type": "image/png",
"purpose": "maskable any",
}
for size in (192, 384, 512, 1024)
],
"screenshots": [
{
"src": "/static/images/screenshots/screenshot-1.png",
"sizes": "413x792",
"type": "image/png",
}
],
"lang": "en-US",
"name": "Home Assistant",
"short_name": "Assistant",
"start_url": "/?homescreen=1",
"theme_color": DEFAULT_THEME_COLOR,
"prefer_related_applications": True,
"related_applications": [
{"platform": "play", "id": "io.homeassistant.companion.android"}
],
}
DATA_PANELS = "frontend_panels"
DATA_JS_VERSION = "frontend_js_version"
@ -124,6 +94,88 @@ SERVICE_SET_THEME = "set_theme"
SERVICE_RELOAD_THEMES = "reload_themes"
class Manifest:
"""Manage the manifest.json contents."""
def __init__(self, data: dict) -> None:
"""Init the manifest manager."""
self.manifest = data
self._serialize()
def __getitem__(self, key: str) -> Any:
"""Return an item in the manifest."""
return self.manifest[key]
@property
def json(self) -> str:
"""Return the serialized manifest."""
return self._serialized
def _serialize(self) -> None:
self._serialized = json.dumps(self.manifest, sort_keys=True)
def update_key(self, key: str, val: str) -> None:
"""Add a keyval to the manifest.json."""
self.manifest[key] = val
self._serialize()
MANIFEST_JSON = Manifest(
{
"background_color": "#FFFFFF",
"description": "Home automation platform that puts local control and privacy first.",
"dir": "ltr",
"display": "standalone",
"icons": [
{
"src": f"/static/icons/favicon-{size}x{size}.png",
"sizes": f"{size}x{size}",
"type": "image/png",
"purpose": "maskable any",
}
for size in (192, 384, 512, 1024)
],
"screenshots": [
{
"src": "/static/images/screenshots/screenshot-1.png",
"sizes": "413x792",
"type": "image/png",
}
],
"lang": "en-US",
"name": "Home Assistant",
"short_name": "Assistant",
"start_url": "/?homescreen=1",
"theme_color": DEFAULT_THEME_COLOR,
"prefer_related_applications": True,
"related_applications": [
{"platform": "play", "id": "io.homeassistant.companion.android"}
],
}
)
class UrlManager:
"""Manage urls to be used on the frontend.
This is abstracted into a class because
some integrations add a remove these directly
on hass.data
"""
def __init__(self, urls):
"""Init the url manager."""
self.urls = frozenset(urls)
def add(self, url):
"""Add a url to the set."""
self.urls = frozenset([*self.urls, url])
def remove(self, url):
"""Remove a url from the set."""
self.urls = self.urls - {url}
class Panel:
"""Abstract class for panels."""
@ -223,15 +275,12 @@ def async_remove_panel(hass, frontend_url_path):
def add_extra_js_url(hass, url, es5=False):
"""Register extra js or module url to load."""
key = DATA_EXTRA_JS_URL_ES5 if es5 else DATA_EXTRA_MODULE_URL
url_set = hass.data.get(key)
if url_set is None:
url_set = hass.data[key] = set()
url_set.add(url)
hass.data[key].add(url)
def add_manifest_json_key(key, val):
"""Add a keyval to the manifest.json."""
MANIFEST_JSON[key] = val
MANIFEST_JSON.update_key(key, val)
def _frontend_root(dev_repo_path):
@ -311,17 +360,8 @@ async def async_setup(hass, config):
sidebar_icon="hass:hammer",
)
if DATA_EXTRA_MODULE_URL not in hass.data:
hass.data[DATA_EXTRA_MODULE_URL] = set()
for url in conf.get(CONF_EXTRA_MODULE_URL, []):
add_extra_js_url(hass, url)
if DATA_EXTRA_JS_URL_ES5 not in hass.data:
hass.data[DATA_EXTRA_JS_URL_ES5] = set()
for url in conf.get(CONF_EXTRA_JS_URL_ES5, []):
add_extra_js_url(hass, url, True)
hass.data[DATA_EXTRA_MODULE_URL] = UrlManager(conf.get(CONF_EXTRA_MODULE_URL, []))
hass.data[DATA_EXTRA_JS_URL_ES5] = UrlManager(conf.get(CONF_EXTRA_JS_URL_ES5, []))
await _async_setup_themes(hass, conf.get(CONF_THEMES))
@ -353,12 +393,16 @@ async def _async_setup_themes(hass, themes):
"""Update theme_color in manifest."""
name = hass.data[DATA_DEFAULT_THEME]
themes = hass.data[DATA_THEMES]
MANIFEST_JSON["theme_color"] = DEFAULT_THEME_COLOR
if name != DEFAULT_THEME:
MANIFEST_JSON["theme_color"] = themes[name].get(
"app-header-background-color",
themes[name].get(PRIMARY_COLOR, DEFAULT_THEME_COLOR),
MANIFEST_JSON.update_key(
"theme_color",
themes[name].get(
"app-header-background-color",
themes[name].get(PRIMARY_COLOR, DEFAULT_THEME_COLOR),
),
)
else:
MANIFEST_JSON.update_key("theme_color", DEFAULT_THEME_COLOR)
hass.bus.async_fire(EVENT_THEMES_UPDATED)
@callback
@ -426,6 +470,12 @@ async def _async_setup_themes(hass, themes):
)
@callback
@lru_cache(maxsize=1)
def _async_render_index_cached(template, **kwargs):
return template.render(**kwargs)
class IndexView(web_urldispatcher.AbstractResource):
"""Serve the frontend."""
@ -504,16 +554,16 @@ class IndexView(web_urldispatcher.AbstractResource):
if not hass.components.onboarding.async_is_onboarded():
return web.Response(status=302, headers={"location": "/onboarding.html"})
template = self._template_cache
if template is None:
template = await hass.async_add_executor_job(self.get_template)
template = self._template_cache or await hass.async_add_executor_job(
self.get_template
)
return web.Response(
text=template.render(
text=_async_render_index_cached(
template,
theme_color=MANIFEST_JSON["theme_color"],
extra_modules=hass.data[DATA_EXTRA_MODULE_URL],
extra_js_es5=hass.data[DATA_EXTRA_JS_URL_ES5],
extra_modules=hass.data[DATA_EXTRA_MODULE_URL].urls,
extra_js_es5=hass.data[DATA_EXTRA_JS_URL_ES5].urls,
),
content_type="text/html",
)
@ -537,8 +587,9 @@ class ManifestJSONView(HomeAssistantView):
@callback
def get(self, request): # pylint: disable=no-self-use
"""Return the manifest.json."""
msg = json.dumps(MANIFEST_JSON, sort_keys=True)
return web.Response(text=msg, content_type="application/manifest+json")
return web.Response(
text=MANIFEST_JSON.json, content_type="application/manifest+json"
)
@callback

42
tests/components/frontend/test_init.py
View File

@ -10,27 +10,26 @@ from homeassistant.components.frontend import (
CONF_EXTRA_HTML_URL_ES5,
CONF_JS_VERSION,
CONF_THEMES,
DEFAULT_THEME_COLOR,
DOMAIN,
EVENT_PANELS_UPDATED,
THEMES_STORAGE_KEY,
)
from homeassistant.components.websocket_api.const import TYPE_RESULT
from homeassistant.const import HTTP_NOT_FOUND
from homeassistant.const import HTTP_NOT_FOUND, HTTP_OK
from homeassistant.loader import async_get_integration
from homeassistant.setup import async_setup_component
from homeassistant.util import dt
from tests.common import async_capture_events, async_fire_time_changed
CONFIG_THEMES = {
DOMAIN: {
CONF_THEMES: {
"happy": {"primary-color": "red"},
"dark": {"primary-color": "black"},
}
}
MOCK_THEMES = {
"happy": {"primary-color": "red", "app-header-background-color": "blue"},
"dark": {"primary-color": "black"},
}
CONFIG_THEMES = {DOMAIN: {CONF_THEMES: MOCK_THEMES}}
@pytest.fixture
async def ignore_frontend_deps(hass):
@ -148,10 +147,7 @@ async def test_themes_api(hass, themes_ws_client):
assert msg["result"]["default_theme"] == "default"
assert msg["result"]["default_dark_theme"] is None
assert msg["result"]["themes"] == {
"happy": {"primary-color": "red"},
"dark": {"primary-color": "black"},
}
assert msg["result"]["themes"] == MOCK_THEMES
# safe mode
hass.config.safe_mode = True
@ -474,3 +470,25 @@ async def test_static_paths(hass, mock_http_client):
)
assert resp.status == 302
assert resp.headers["location"] == "/profile"
async def test_manifest_json(hass, frontend_themes, mock_http_client):
"""Test for fetching manifest.json."""
resp = await mock_http_client.get("/manifest.json")
assert resp.status == HTTP_OK
assert "cache-control" not in resp.headers
json = await resp.json()
assert json["theme_color"] == DEFAULT_THEME_COLOR
await hass.services.async_call(
DOMAIN, "set_theme", {"name": "happy"}, blocking=True
)
await hass.async_block_till_done()
resp = await mock_http_client.get("/manifest.json")
assert resp.status == HTTP_OK
assert "cache-control" not in resp.headers
json = await resp.json()
assert json["theme_color"] != DEFAULT_THEME_COLOR