core/homeassistant/components/generic/config_flow.py

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"""Config flow for generic (IP Camera)."""
from __future__ import annotations
import contextlib
from errno import EHOSTUNREACH, EIO
from functools import partial
import imghdr
import logging
from types import MappingProxyType
from typing import Any
from urllib.parse import urlparse, urlunparse
from async_timeout import timeout
import av
from httpx import HTTPStatusError, RequestError, TimeoutException
import voluptuous as vol
from homeassistant.components.stream.const import SOURCE_TIMEOUT
from homeassistant.config_entries import ConfigEntry, ConfigFlow, OptionsFlow
from homeassistant.const import (
CONF_AUTHENTICATION,
CONF_NAME,
CONF_PASSWORD,
CONF_USERNAME,
CONF_VERIFY_SSL,
HTTP_BASIC_AUTHENTICATION,
HTTP_DIGEST_AUTHENTICATION,
)
from homeassistant.data_entry_flow import FlowResult
from homeassistant.exceptions import TemplateError
from homeassistant.helpers import config_validation as cv, template as template_helper
from homeassistant.helpers.httpx_client import get_async_client
from homeassistant.util import slugify
from .camera import generate_auth
from .const import (
CONF_CONTENT_TYPE,
CONF_FRAMERATE,
CONF_LIMIT_REFETCH_TO_URL_CHANGE,
CONF_RTSP_TRANSPORT,
CONF_STILL_IMAGE_URL,
CONF_STREAM_SOURCE,
DEFAULT_NAME,
DOMAIN,
FFMPEG_OPTION_MAP,
GET_IMAGE_TIMEOUT,
RTSP_TRANSPORTS,
)
_LOGGER = logging.getLogger(__name__)
DEFAULT_DATA = {
CONF_NAME: DEFAULT_NAME,
CONF_AUTHENTICATION: HTTP_BASIC_AUTHENTICATION,
CONF_LIMIT_REFETCH_TO_URL_CHANGE: False,
CONF_FRAMERATE: 2,
CONF_VERIFY_SSL: True,
}
SUPPORTED_IMAGE_TYPES = ["png", "jpeg", "svg+xml"]
def build_schema(
user_input: dict[str, Any] | MappingProxyType[str, Any],
is_options_flow: bool = False,
):
"""Create schema for camera config setup."""
spec = {
vol.Optional(
CONF_STILL_IMAGE_URL,
description={"suggested_value": user_input.get(CONF_STILL_IMAGE_URL, "")},
): str,
vol.Optional(
CONF_STREAM_SOURCE,
description={"suggested_value": user_input.get(CONF_STREAM_SOURCE, "")},
): str,
vol.Optional(
CONF_RTSP_TRANSPORT,
description={"suggested_value": user_input.get(CONF_RTSP_TRANSPORT)},
): vol.In(RTSP_TRANSPORTS),
vol.Optional(
CONF_AUTHENTICATION,
description={"suggested_value": user_input.get(CONF_AUTHENTICATION)},
): vol.In([HTTP_BASIC_AUTHENTICATION, HTTP_DIGEST_AUTHENTICATION]),
vol.Optional(
CONF_USERNAME,
description={"suggested_value": user_input.get(CONF_USERNAME, "")},
): str,
vol.Optional(
CONF_PASSWORD,
description={"suggested_value": user_input.get(CONF_PASSWORD, "")},
): str,
vol.Required(
CONF_FRAMERATE,
description={"suggested_value": user_input.get(CONF_FRAMERATE, 2)},
): int,
vol.Required(
CONF_VERIFY_SSL, default=user_input.get(CONF_VERIFY_SSL, True)
): bool,
}
if is_options_flow:
spec[
vol.Required(
CONF_LIMIT_REFETCH_TO_URL_CHANGE,
default=user_input.get(CONF_LIMIT_REFETCH_TO_URL_CHANGE, False),
)
] = bool
return vol.Schema(spec)
def get_image_type(image):
"""Get the format of downloaded bytes that could be an image."""
fmt = imghdr.what(None, h=image)
if fmt is None:
# if imghdr can't figure it out, could be svg.
with contextlib.suppress(UnicodeDecodeError):
if image.decode("utf-8").startswith("<svg"):
return "svg+xml"
return fmt
async def async_test_still(hass, info) -> tuple[dict[str, str], str | None]:
"""Verify that the still image is valid before we create an entity."""
fmt = None
if not (url := info.get(CONF_STILL_IMAGE_URL)):
return {}, None
if not isinstance(url, template_helper.Template) and url:
url = cv.template(url)
url.hass = hass
try:
url = url.async_render(parse_result=False)
except TemplateError as err:
_LOGGER.error("Error parsing template %s: %s", url, err)
return {CONF_STILL_IMAGE_URL: "template_error"}, None
verify_ssl = info.get(CONF_VERIFY_SSL)
auth = generate_auth(info)
try:
async_client = get_async_client(hass, verify_ssl=verify_ssl)
async with timeout(GET_IMAGE_TIMEOUT):
response = await async_client.get(url, auth=auth, timeout=GET_IMAGE_TIMEOUT)
response.raise_for_status()
image = response.content
except (
TimeoutError,
RequestError,
HTTPStatusError,
TimeoutException,
) as err:
_LOGGER.error("Error getting camera image from %s: %s", url, type(err).__name__)
return {CONF_STILL_IMAGE_URL: "unable_still_load"}, None
if not image:
return {CONF_STILL_IMAGE_URL: "unable_still_load"}, None
fmt = get_image_type(image)
_LOGGER.debug(
"Still image at '%s' detected format: %s",
info[CONF_STILL_IMAGE_URL],
fmt,
)
if fmt not in SUPPORTED_IMAGE_TYPES:
return {CONF_STILL_IMAGE_URL: "invalid_still_image"}, None
return {}, f"image/{fmt}"
def slug_url(url) -> str | None:
"""Convert a camera url into a string suitable for a camera name."""
if not url:
return None
url_no_scheme = urlparse(url)._replace(scheme="")
return slugify(urlunparse(url_no_scheme).strip("/"))
async def async_test_stream(hass, info) -> dict[str, str]:
"""Verify that the stream is valid before we create an entity."""
if not (stream_source := info.get(CONF_STREAM_SOURCE)):
return {}
try:
# For RTSP streams, prefer TCP. This code is duplicated from
# homeassistant.components.stream.__init__.py:create_stream()
# It may be possible & better to call create_stream() directly.
stream_options: dict[str, str] = {}
if isinstance(stream_source, str) and stream_source[:7] == "rtsp://":
stream_options = {
"rtsp_flags": "prefer_tcp",
"stimeout": "5000000",
}
if rtsp_transport := info.get(CONF_RTSP_TRANSPORT):
stream_options[FFMPEG_OPTION_MAP[CONF_RTSP_TRANSPORT]] = rtsp_transport
_LOGGER.debug("Attempting to open stream %s", stream_source)
container = await hass.async_add_executor_job(
partial(
av.open,
stream_source,
options=stream_options,
timeout=SOURCE_TIMEOUT,
)
)
_ = container.streams.video[0]
except (av.error.FileNotFoundError): # pylint: disable=c-extension-no-member
return {CONF_STREAM_SOURCE: "stream_file_not_found"}
except (av.error.HTTPNotFoundError): # pylint: disable=c-extension-no-member
return {CONF_STREAM_SOURCE: "stream_http_not_found"}
except (av.error.TimeoutError): # pylint: disable=c-extension-no-member
return {CONF_STREAM_SOURCE: "timeout"}
except av.error.HTTPUnauthorizedError: # pylint: disable=c-extension-no-member
return {CONF_STREAM_SOURCE: "stream_unauthorised"}
except (KeyError, IndexError):
return {CONF_STREAM_SOURCE: "stream_no_video"}
except PermissionError:
return {CONF_STREAM_SOURCE: "stream_not_permitted"}
except OSError as err:
if err.errno == EHOSTUNREACH:
return {CONF_STREAM_SOURCE: "stream_no_route_to_host"}
if err.errno == EIO: # input/output error
return {CONF_STREAM_SOURCE: "stream_io_error"}
raise err
return {}
class GenericIPCamConfigFlow(ConfigFlow, domain=DOMAIN):
"""Config flow for generic IP camera."""
VERSION = 1
@staticmethod
def async_get_options_flow(
config_entry: ConfigEntry,
) -> GenericOptionsFlowHandler:
"""Get the options flow for this handler."""
return GenericOptionsFlowHandler(config_entry)
def check_for_existing(self, options):
"""Check whether an existing entry is using the same URLs."""
return any(
entry.options[CONF_STILL_IMAGE_URL] == options[CONF_STILL_IMAGE_URL]
and entry.options[CONF_STREAM_SOURCE] == options[CONF_STREAM_SOURCE]
for entry in self._async_current_entries()
)
async def async_step_user(
self, user_input: dict[str, Any] | None = None
) -> FlowResult:
"""Handle the start of the config flow."""
errors = {}
if user_input:
# Secondary validation because serialised vol can't seem to handle this complexity:
if not user_input.get(CONF_STILL_IMAGE_URL) and not user_input.get(
CONF_STREAM_SOURCE
):
errors["base"] = "no_still_image_or_stream_url"
else:
errors, still_format = await async_test_still(self.hass, user_input)
errors = errors | await async_test_stream(self.hass, user_input)
still_url = user_input.get(CONF_STILL_IMAGE_URL)
stream_url = user_input.get(CONF_STREAM_SOURCE)
name = slug_url(still_url) or slug_url(stream_url) or DEFAULT_NAME
if not errors:
user_input[CONF_CONTENT_TYPE] = still_format
user_input[CONF_LIMIT_REFETCH_TO_URL_CHANGE] = False
await self.async_set_unique_id(self.flow_id)
return self.async_create_entry(
title=name, data={}, options=user_input
)
else:
user_input = DEFAULT_DATA.copy()
return self.async_show_form(
step_id="user",
data_schema=build_schema(user_input),
errors=errors,
)
async def async_step_import(self, import_config) -> FlowResult:
"""Handle config import from yaml."""
# abort if we've already got this one.
if self.check_for_existing(import_config):
return self.async_abort(reason="already_exists")
errors, still_format = await async_test_still(self.hass, import_config)
errors = errors | await async_test_stream(self.hass, import_config)
still_url = import_config.get(CONF_STILL_IMAGE_URL)
stream_url = import_config.get(CONF_STREAM_SOURCE)
name = import_config.get(
CONF_NAME, slug_url(still_url) or slug_url(stream_url) or DEFAULT_NAME
)
if CONF_LIMIT_REFETCH_TO_URL_CHANGE not in import_config:
import_config[CONF_LIMIT_REFETCH_TO_URL_CHANGE] = False
if not errors:
import_config[CONF_CONTENT_TYPE] = still_format
await self.async_set_unique_id(self.flow_id)
return self.async_create_entry(title=name, data={}, options=import_config)
_LOGGER.error(
"Error importing generic IP camera platform config: unexpected error '%s'",
list(errors.values()),
)
return self.async_abort(reason="unknown")
class GenericOptionsFlowHandler(OptionsFlow):
"""Handle Generic IP Camera options."""
def __init__(self, config_entry: ConfigEntry) -> None:
"""Initialize Generic IP Camera options flow."""
self.config_entry = config_entry
async def async_step_init(
self, user_input: dict[str, Any] | None = None
) -> FlowResult:
"""Manage Generic IP Camera options."""
errors: dict[str, str] = {}
if user_input is not None:
errors, still_format = await async_test_still(self.hass, user_input)
errors = errors | await async_test_stream(self.hass, user_input)
still_url = user_input.get(CONF_STILL_IMAGE_URL)
stream_url = user_input.get(CONF_STREAM_SOURCE)
if not errors:
return self.async_create_entry(
title=slug_url(still_url) or slug_url(stream_url) or DEFAULT_NAME,
data={
CONF_AUTHENTICATION: user_input.get(CONF_AUTHENTICATION),
CONF_STREAM_SOURCE: user_input.get(CONF_STREAM_SOURCE),
CONF_PASSWORD: user_input.get(CONF_PASSWORD),
CONF_STILL_IMAGE_URL: user_input.get(CONF_STILL_IMAGE_URL),
CONF_CONTENT_TYPE: still_format,
CONF_USERNAME: user_input.get(CONF_USERNAME),
CONF_LIMIT_REFETCH_TO_URL_CHANGE: user_input[
CONF_LIMIT_REFETCH_TO_URL_CHANGE
],
CONF_FRAMERATE: user_input[CONF_FRAMERATE],
CONF_VERIFY_SSL: user_input[CONF_VERIFY_SSL],
},
)
return self.async_show_form(
step_id="init",
data_schema=build_schema(user_input or self.config_entry.options, True),
errors=errors,
)