hass-core/homeassistant/components/http/__init__.py
Paulus Schoutsen 31c88efc4a Updated favicon
2014-09-23 16:51:39 -05:00

841 lines
29 KiB
Python

"""
homeassistant.components.httpinterface
~~~~~~~~~~~~~~~~~~~~~~~~~~~
This module provides an API and a HTTP interface for debug purposes.
By default it will run on port 8123.
All API calls have to be accompanied by an 'api_password' parameter and will
return JSON. If successful calls will return status code 200 or 201.
Other status codes that can occur are:
- 400 (Bad Request)
- 401 (Unauthorized)
- 404 (Not Found)
- 405 (Method not allowed)
The api supports the following actions:
/api - GET
Returns message if API is up and running.
Example result:
{
"message": "API running."
}
/api/states - GET
Returns a list of entities for which a state is available
Example result:
{
"entity_ids": [
"Paulus_Nexus_4",
"weather.sun",
"all_devices"
]
}
/api/states/<entity_id> - GET
Returns the current state from an entity
Example result:
{
"attributes": {
"next_rising": "07:04:15 29-10-2013",
"next_setting": "18:00:31 29-10-2013"
},
"entity_id": "weather.sun",
"last_changed": "23:24:33 28-10-2013",
"state": "below_horizon"
}
/api/states/<entity_id> - POST
Updates the current state of an entity. Returns status code 201 if successful
with location header of updated resource and as body the new state.
parameter: new_state - string
optional parameter: attributes - JSON encoded object
Example result:
{
"attributes": {
"next_rising": "07:04:15 29-10-2013",
"next_setting": "18:00:31 29-10-2013"
},
"entity_id": "weather.sun",
"last_changed": "23:24:33 28-10-2013",
"state": "below_horizon"
}
/api/events/<event_type> - POST
Fires an event with event_type
optional parameter: event_data - JSON encoded object
Example result:
{
"message": "Event download_file fired."
}
"""
import json
import threading
import logging
import re
import os
import time
from http.server import BaseHTTPRequestHandler, HTTPServer
from socketserver import ThreadingMixIn
from urllib.parse import urlparse, parse_qs
import homeassistant as ha
import homeassistant.remote as rem
import homeassistant.util as util
from homeassistant.components import (STATE_ON, STATE_OFF,
SERVICE_TURN_ON, SERVICE_TURN_OFF)
DOMAIN = "http"
DEPENDENCIES = []
HTTP_OK = 200
HTTP_CREATED = 201
HTTP_MOVED_PERMANENTLY = 301
HTTP_BAD_REQUEST = 400
HTTP_UNAUTHORIZED = 401
HTTP_NOT_FOUND = 404
HTTP_METHOD_NOT_ALLOWED = 405
HTTP_UNPROCESSABLE_ENTITY = 422
URL_ROOT = "/"
URL_CHANGE_STATE = "/change_state"
URL_FIRE_EVENT = "/fire_event"
URL_CALL_SERVICE = "/call_service"
URL_STATIC = "/static/{}"
DOMAIN_ICONS = {
"sun": "glyphicon-asterisk",
"group": "glyphicon-th-large",
"charging": "glyphicon-flash",
"light": "glyphicon-hdd",
"wemo": "glyphicon-hdd",
"device_tracker": "glyphicon-phone",
"chromecast": "glyphicon-picture",
"process": "glyphicon-barcode",
"browser": "glyphicon-globe",
"homeassistant": "glyphicon-home",
"downloader": "glyphicon-download-alt"
}
CONF_API_PASSWORD = "api_password"
CONF_SERVER_HOST = "server_host"
CONF_SERVER_PORT = "server_port"
def _get_domain_icon(domain):
""" Returns HTML that shows domain icon. """
return "<span class='glyphicon {}'></span>".format(
DOMAIN_ICONS.get(domain, ""))
def setup(hass, config):
""" Sets up the HTTP API and debug interface. """
if not util.validate_config(config, {DOMAIN: [CONF_API_PASSWORD]},
logging.getLogger(__name__)):
return False
api_password = config[DOMAIN]['api_password']
# If no server host is given, accept all incoming requests
server_host = config[DOMAIN].get(CONF_SERVER_HOST, '0.0.0.0')
server_port = config[DOMAIN].get(CONF_SERVER_PORT, rem.SERVER_PORT)
server = HomeAssistantHTTPServer((server_host, server_port),
RequestHandler, hass, api_password)
hass.listen_once_event(
ha.EVENT_HOMEASSISTANT_START,
lambda event:
threading.Thread(target=server.start, daemon=True).start())
# If no local api set, set one with known information
if isinstance(hass, rem.HomeAssistant) and hass.local_api is None:
hass.local_api = \
rem.API(util.get_local_ip(), api_password, server_port)
return True
class HomeAssistantHTTPServer(ThreadingMixIn, HTTPServer):
""" Handle HTTP requests in a threaded fashion. """
def __init__(self, server_address, RequestHandlerClass,
hass, api_password):
super().__init__(server_address, RequestHandlerClass)
self.hass = hass
self.api_password = api_password
self.logger = logging.getLogger(__name__)
# To store flash messages between sessions
self.flash_message = None
# We will lazy init this one if needed
self.event_forwarder = None
def start(self):
""" Starts the server. """
self.logger.info("Starting")
self.serve_forever()
# pylint: disable=too-many-public-methods
class RequestHandler(BaseHTTPRequestHandler):
""" Handles incoming HTTP requests """
PATHS = [ # debug interface
('GET', URL_ROOT, '_handle_get_root'),
# These get compiled as RE because these methods are reused
# by other urls that use url parameters
('POST', re.compile(URL_CHANGE_STATE), '_handle_change_state'),
('POST', re.compile(URL_FIRE_EVENT), '_handle_fire_event'),
('POST', re.compile(URL_CALL_SERVICE), '_handle_call_service'),
# /api - for validation purposes
('GET', rem.URL_API, '_handle_get_api'),
# /states
('GET', rem.URL_API_STATES, '_handle_get_api_states'),
('GET',
re.compile(r'/api/states/(?P<entity_id>[a-zA-Z\._0-9]+)'),
'_handle_get_api_states_entity'),
('POST',
re.compile(r'/api/states/(?P<entity_id>[a-zA-Z\._0-9]+)'),
'_handle_change_state'),
# /events
('GET', rem.URL_API_EVENTS, '_handle_get_api_events'),
('POST',
re.compile(r'/api/events/(?P<event_type>[a-zA-Z\._0-9]+)'),
'_handle_fire_event'),
# /services
('GET', rem.URL_API_SERVICES, '_handle_get_api_services'),
('POST',
re.compile((r'/api/services/'
r'(?P<domain>[a-zA-Z\._0-9]+)/'
r'(?P<service>[a-zA-Z\._0-9]+)')),
'_handle_call_service'),
# /event_forwarding
('POST', rem.URL_API_EVENT_FORWARD, '_handle_post_api_event_forward'),
('DELETE', rem.URL_API_EVENT_FORWARD,
'_handle_delete_api_event_forward'),
# Statis files
('GET', re.compile(r'/static/(?P<file>[a-zA-Z\._\-0-9/]+)'),
'_handle_get_static')
]
use_json = False
def _handle_request(self, method): # pylint: disable=too-many-branches
""" Does some common checks and calls appropriate method. """
url = urlparse(self.path)
# Read query input
data = parse_qs(url.query)
# Did we get post input ?
content_length = int(self.headers.get('Content-Length', 0))
if content_length:
data.update(parse_qs(self.rfile.read(
content_length).decode("UTF-8")))
try:
api_password = data['api_password'][0]
except KeyError:
api_password = ''
if '_METHOD' in data:
method = data['_METHOD'][0]
if url.path.startswith('/api/'):
self.use_json = True
# Var to keep track if we found a path that matched a handler but
# the method was different
path_matched_but_not_method = False
# Var to hold the handler for this path and method if found
handle_request_method = False
# Check every handler to find matching result
for t_method, t_path, t_handler in RequestHandler.PATHS:
# we either do string-comparison or regular expression matching
# pylint: disable=maybe-no-member
if isinstance(t_path, str):
path_match = url.path == t_path
else:
path_match = t_path.match(url.path)
if path_match and method == t_method:
# Call the method
handle_request_method = getattr(self, t_handler)
break
elif path_match:
path_matched_but_not_method = True
# Did we find a handler for the incoming request?
if handle_request_method:
# Do not enforce api password for static files
if handle_request_method == self._handle_get_static or \
self._verify_api_password(api_password):
handle_request_method(path_match, data)
elif path_matched_but_not_method:
self.send_response(HTTP_METHOD_NOT_ALLOWED)
else:
self.send_response(HTTP_NOT_FOUND)
def do_GET(self): # pylint: disable=invalid-name
""" GET request handler. """
self._handle_request('GET')
def do_POST(self): # pylint: disable=invalid-name
""" POST request handler. """
self._handle_request('POST')
def _verify_api_password(self, api_password):
""" Helper method to verify the API password
and take action if incorrect. """
if api_password == self.server.api_password:
return True
elif self.use_json:
self._message(
"API password missing or incorrect.", HTTP_UNAUTHORIZED)
else:
self.send_response(HTTP_OK)
self.send_header('Content-type', 'text/html')
self.end_headers()
self.wfile.write((
"<html>"
"<head><title>Home Assistant</title>"
"<link rel='stylesheet' type='text/css' "
" href='/static/style.css'>"
"<link rel='shortcut icon' href='/static/favicon.ico' />"
"<link rel='icon' type='image/png' "
" href='/static/favicon-192x192.png' sizes='192x192'>"
"</head>"
"<body>"
"<div class='container'>"
"<form class='form-signin' action='{}' method='GET'>"
"<input type='text' class='form-control' name='api_password' "
" placeholder='API Password for Home Assistant' "
" required autofocus>"
"<button class='btn btn-lg btn-primary btn-block' "
" type='submit'>Enter</button>"
"</form>"
"</div>"
"</body></html>").format(self.path).encode("UTF-8"))
return False
# pylint: disable=unused-argument
def _handle_get_root(self, path_match, data):
""" Renders the debug interface. """
write = lambda txt: self.wfile.write((txt + "\n").encode("UTF-8"))
self.send_response(HTTP_OK)
self.send_header('Content-type', 'text/html; charset=utf-8')
self.end_headers()
write(("<html>"
"<head><title>Home Assistant</title>"
"<link rel='stylesheet' type='text/css' "
" href='/static/style.css'>"
"<link rel='shortcut icon' href='/static/favicon.ico' />"
"<link rel='icon' type='image/png' "
" href='/static/favicon-192x192.png' sizes='192x192'>"
"<script src='http://code.jquery.com/jquery-2.1.1.min.js'>"
" </script>"
"<script type='text/javascript' src='/static/script.js'>"
" </script>"
"</head>"
"<body>"
"<div class='container'>"
"<div class='page-header'><h1>Home Assistant</h1></div>"))
# Flash message support
if self.server.flash_message:
write(("<div class='row'><div class='col-xs-12'>"
"<div class='alert alert-success'>"
"{}</div></div></div>").format(self.server.flash_message))
self.server.flash_message = None
# Describe state machine:
write(("<div class='row'>"
"<div class='col-xs-12'>"
"<div class='states panel panel-primary'>"
"<div class='panel-heading'><h2 class='panel-title'>"
" States</h2></div>"
"<form method='post' action='/change_state' "
" class='form-change-state'>"
"<input type='hidden' name='api_password' value='{}'>"
"<table class='table'><tr><th></th>"
"<th>Entity ID</th><th>State</th>"
"<th>Attributes</th><th>Last Changed</th>"
"</tr>").format(self.server.api_password))
for entity_id, state in \
sorted(self.server.hass.states.all().items(),
key=lambda item: item[0].lower()):
domain = util.split_entity_id(entity_id)[0]
attributes = "<br>".join(
"{}: {}".format(attr, val)
for attr, val in state.attributes.items())
write("<tr><td>{}</td><td>{}</td><td>{}".format(
_get_domain_icon(domain), entity_id, state.state))
if state.state == STATE_ON or state.state == STATE_OFF:
if state.state == STATE_ON:
action = SERVICE_TURN_OFF
else:
action = SERVICE_TURN_ON
write(("<a class='glyphicon glyphicon-off pull-right' "
"data-service='homeassistant/{}' "
"data-entity_id='{}' data-service-autofire "
"href='#'></a>").format(action, state.entity_id))
write("</td><td>{}</td><td>{}</td></tr>".format(
attributes, util.datetime_to_str(state.last_changed)))
# Change state form
write(("<tr><td></td><td><input name='entity_id' class='form-control' "
" placeholder='Entity ID'></td>"
"<td><input name='new_state' class='form-control' "
" placeholder='New State'></td>"
"<td><textarea rows='3' name='attributes' class='form-control' "
" placeholder='State Attributes (JSON, optional)'>"
"</textarea></td>"
"<td><button type='submit' class='btn btn-default'>"
"Set State</button></td></tr>"
"</table></form></div>"
"</div></div>"))
# Describe bus/services:
write(("<div class='row'>"
"<div class='col-xs-6'>"
"<div class='services panel panel-primary'>"
"<div class='panel-heading'><h2 class='panel-title'>"
" Services</h2></div>"
"<table class='table'>"
"<tr><th></th><th>Domain</th><th>Service</th></tr>"))
for domain, services in sorted(
self.server.hass.services.services.items()):
write("<tr><td>{}</td><td>{}</td><td>".format(
_get_domain_icon(domain), domain))
write(", ".join(
"<a href='#' data-service='{0}/{1}'>{1}</a>".format(
domain, service) for service in sorted(services)))
write("</td></tr>")
write(("</table></div></div>"
"<div class='col-xs-6'>"
"<div class='panel panel-primary'>"
"<div class='panel-heading'><h2 class='panel-title'>"
" Call Service</h2></div>"
"<div class='panel-body'>"
"<form method='post' action='/call_service' "
" class='form-horizontal form-call-service'>"
"<input type='hidden' name='api_password' value='{}'>"
"<div class='form-group'>"
" <label for='domain' class='col-xs-3 control-label'>"
" Domain</label>"
" <div class='col-xs-9'>"
" <input type='text' class='form-control' id='domain'"
" name='domain' placeholder='Service Domain'>"
" </div>"
"</div>"
"<div class='form-group'>"
" <label for='service' class='col-xs-3 control-label'>"
" Service</label>"
" <div class='col-xs-9'>"
" <input type='text' class='form-control' id='service'"
" name='service' placeholder='Service name'>"
" </div>"
"</div>"
"<div class='form-group'>"
" <label for='service_data' class='col-xs-3 control-label'>"
" Service data</label>"
" <div class='col-xs-9'>"
" <textarea rows='3' class='form-control' id='service_data'"
" name='service_data' placeholder='Service Data "
"(JSON, optional)'></textarea>"
" </div>"
"</div>"
"<div class='form-group'>"
" <div class='col-xs-offset-3 col-xs-9'>"
" <button type='submit' class='btn btn-default'>"
" Call Service</button>"
" </div>"
"</div>"
"</form>"
"</div></div></div>"
"</div>").format(self.server.api_password))
# Describe bus/events:
write(("<div class='row'>"
"<div class='col-xs-6'>"
"<div class='panel panel-primary'>"
"<div class='panel-heading'><h2 class='panel-title'>"
" Events</h2></div>"
"<table class='table'>"
"<tr><th>Event</th><th>Listeners</th></tr>"))
for event, listener_count in sorted(
self.server.hass.bus.listeners.items()):
write("<tr><td>{}</td><td>{}</td></tr>".format(
event, listener_count))
write(("</table></div></div>"
"<div class='col-xs-6'>"
"<div class='panel panel-primary'>"
"<div class='panel-heading'><h2 class='panel-title'>"
" Fire Event</h2></div>"
"<div class='panel-body'>"
"<form method='post' action='/fire_event' "
" class='form-horizontal form-fire-event'>"
"<input type='hidden' name='api_password' value='{}'>"
"<div class='form-group'>"
" <label for='event_type' class='col-xs-3 control-label'>"
" Event type</label>"
" <div class='col-xs-9'>"
" <input type='text' class='form-control' id='event_type'"
" name='event_type' placeholder='Event Type'>"
" </div>"
"</div>"
"<div class='form-group'>"
" <label for='event_data' class='col-xs-3 control-label'>"
" Event data</label>"
" <div class='col-xs-9'>"
" <textarea rows='3' class='form-control' id='event_data'"
" name='event_data' placeholder='Event Data "
"(JSON, optional)'></textarea>"
" </div>"
"</div>"
"<div class='form-group'>"
" <div class='col-xs-offset-3 col-xs-9'>"
" <button type='submit' class='btn btn-default'>"
" Fire Event</button>"
" </div>"
"</div>"
"</form>"
"</div></div></div>"
"</div>").format(self.server.api_password))
write("</div></body></html>")
# pylint: disable=invalid-name
def _handle_change_state(self, path_match, data):
""" Handles updating the state of an entity.
This handles the following paths:
/change_state
/api/states/<entity_id>
"""
try:
try:
entity_id = path_match.group('entity_id')
except IndexError:
# If group 'entity_id' does not exist in path_match
entity_id = data['entity_id'][0]
new_state = data['new_state'][0]
try:
attributes = json.loads(data['attributes'][0])
except KeyError:
# Happens if key 'attributes' does not exist
attributes = None
# Write state
self.server.hass.states.set(entity_id, new_state, attributes)
# Return state if json, else redirect to main page
if self.use_json:
state = self.server.hass.states.get(entity_id)
self._write_json(state.as_dict(),
status_code=HTTP_CREATED,
location=
rem.URL_API_STATES_ENTITY.format(entity_id))
else:
self._message(
"State of {} changed to {}".format(entity_id, new_state))
except KeyError:
# If new_state don't exist in post data
self._message(
"No new_state submitted.", HTTP_BAD_REQUEST)
except ValueError:
# Occurs during error parsing json
self._message(
"Invalid JSON for attributes", HTTP_UNPROCESSABLE_ENTITY)
# pylint: disable=invalid-name
def _handle_fire_event(self, path_match, data):
""" Handles firing of an event.
This handles the following paths:
/fire_event
/api/events/<event_type>
Events from /api are threated as remote events.
"""
try:
try:
event_type = path_match.group('event_type')
event_origin = ha.EventOrigin.remote
except IndexError:
# If group event_type does not exist in path_match
event_type = data['event_type'][0]
event_origin = ha.EventOrigin.local
if 'event_data' in data:
event_data = json.loads(data['event_data'][0])
else:
event_data = None
# Special case handling for event STATE_CHANGED
# We will try to convert state dicts back to State objects
if event_type == ha.EVENT_STATE_CHANGED and event_data:
for key in ('old_state', 'new_state'):
state = ha.State.from_dict(event_data.get(key))
if state:
event_data[key] = state
self.server.hass.bus.fire(event_type, event_data, event_origin)
self._message("Event {} fired.".format(event_type))
except KeyError:
# Occurs if event_type does not exist in data
self._message("No event_type received.", HTTP_BAD_REQUEST)
except ValueError:
# Occurs during error parsing json
self._message(
"Invalid JSON for event_data", HTTP_UNPROCESSABLE_ENTITY)
def _handle_call_service(self, path_match, data):
""" Handles calling a service.
This handles the following paths:
/call_service
/api/services/<domain>/<service>
"""
try:
try:
domain = path_match.group('domain')
service = path_match.group('service')
except IndexError:
# If group domain or service does not exist in path_match
domain = data['domain'][0]
service = data['service'][0]
try:
service_data = json.loads(data['service_data'][0])
except KeyError:
# Happens if key 'service_data' does not exist
service_data = None
self.server.hass.call_service(domain, service, service_data)
self._message("Service {}/{} called.".format(domain, service))
except KeyError:
# Occurs if domain or service does not exist in data
self._message("No domain or service received.", HTTP_BAD_REQUEST)
except ValueError:
# Occurs during error parsing json
self._message(
"Invalid JSON for service_data", HTTP_UNPROCESSABLE_ENTITY)
# pylint: disable=unused-argument
def _handle_get_api(self, path_match, data):
""" Renders the debug interface. """
self._message("API running.")
# pylint: disable=unused-argument
def _handle_get_api_states(self, path_match, data):
""" Returns a dict containing all entity ids and their state. """
self._write_json(self.server.hass.states.all())
# pylint: disable=unused-argument
def _handle_get_api_states_entity(self, path_match, data):
""" Returns the state of a specific entity. """
entity_id = path_match.group('entity_id')
state = self.server.hass.states.get(entity_id)
if state:
self._write_json(state)
else:
self._message("State does not exist.", HTTP_UNPROCESSABLE_ENTITY)
def _handle_get_api_events(self, path_match, data):
""" Handles getting overview of event listeners. """
self._write_json({'event_listeners': self.server.hass.bus.listeners})
def _handle_get_api_services(self, path_match, data):
""" Handles getting overview of services. """
self._write_json({'services': self.server.hass.services.services})
def _handle_post_api_event_forward(self, path_match, data):
""" Handles adding an event forwarding target. """
try:
host = data['host'][0]
api_password = data['api_password'][0]
port = int(data['port'][0]) if 'port' in data else None
if self.server.event_forwarder is None:
self.server.event_forwarder = \
rem.EventForwarder(self.server.hass)
api = rem.API(host, api_password, port)
self.server.event_forwarder.connect(api)
self._message("Event forwarding setup.")
except KeyError:
# Occurs if domain or service does not exist in data
self._message("No host or api_password received.",
HTTP_BAD_REQUEST)
except ValueError:
# Occurs during error parsing port
self._message(
"Invalid value received for port", HTTP_UNPROCESSABLE_ENTITY)
def _handle_delete_api_event_forward(self, path_match, data):
""" Handles deleting an event forwarding target. """
try:
host = data['host'][0]
port = int(data['port'][0]) if 'port' in data else None
if self.server.event_forwarder is not None:
api = rem.API(host, None, port)
self.server.event_forwarder.disconnect(api)
self._message("Event forwarding cancelled.")
except KeyError:
# Occurs if domain or service does not exist in data
self._message("No host or api_password received.",
HTTP_BAD_REQUEST)
except ValueError:
# Occurs during error parsing port
self._message(
"Invalid value received for port", HTTP_UNPROCESSABLE_ENTITY)
def _handle_get_static(self, path_match, data):
""" Returns a static file. """
req_file = util.sanitize_filename(path_match.group('file'))
path = os.path.join(os.path.dirname(__file__), 'www_static', req_file)
if os.path.isfile(path):
self.send_response(HTTP_OK)
self.send_header("Cache-control", "public, max-age=3600")
self.send_header("Expires",
self.date_time_string(time.time()+3600))
self.end_headers()
with open(path, 'rb') as inp:
data = inp.read(1024)
while data:
self.wfile.write(data)
data = inp.read(1024)
else:
self.send_response(HTTP_NOT_FOUND)
self.end_headers()
def _message(self, message, status_code=HTTP_OK):
""" Helper method to return a message to the caller. """
if self.use_json:
self._write_json({'message': message}, status_code=status_code)
elif status_code == HTTP_OK:
self.server.flash_message = message
self._redirect('/')
else:
self.send_error(status_code, message)
def _redirect(self, location):
""" Helper method to redirect caller. """
self.send_response(HTTP_MOVED_PERMANENTLY)
self.send_header(
"Location", "{}?api_password={}".format(
location, self.server.api_password))
self.end_headers()
def _write_json(self, data=None, status_code=HTTP_OK, location=None):
""" Helper method to return JSON to the caller. """
self.send_response(status_code)
self.send_header('Content-type', 'application/json')
if location:
self.send_header('Location', location)
self.end_headers()
if data:
self.wfile.write(
json.dumps(data, indent=4, sort_keys=True,
cls=rem.JSONEncoder).encode("UTF-8"))