694 lines
23 KiB
Python
694 lines
23 KiB
Python
"""
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homeassistant.httpinterface
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~~~~~~~~~~~~~~~~~~~~~~~~~~~
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This module provides an API and a HTTP interface for debug purposes.
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By default it will run on port 8123.
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All API calls have to be accompanied by an 'api_password' parameter and will
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return JSON. If successful calls will return status code 200 or 201.
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Other status codes that can occur are:
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- 400 (Bad Request)
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- 401 (Unauthorized)
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- 404 (Not Found)
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- 405 (Method not allowed)
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The api supports the following actions:
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/api/states - GET
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Returns a list of categories for which a state is available
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Example result:
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{
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"categories": [
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"Paulus_Nexus_4",
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"weather.sun",
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"all_devices"
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]
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}
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/api/states/<category> - GET
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Returns the current state from a category
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Example result:
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{
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"attributes": {
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"next_rising": "07:04:15 29-10-2013",
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"next_setting": "18:00:31 29-10-2013"
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},
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"category": "weather.sun",
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"last_changed": "23:24:33 28-10-2013",
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"state": "below_horizon"
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}
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/api/states/<category> - POST
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Updates the current state of a category. Returns status code 201 if successful
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with location header of updated resource and as body the new state.
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parameter: new_state - string
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optional parameter: attributes - JSON encoded object
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Example result:
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{
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"attributes": {
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"next_rising": "07:04:15 29-10-2013",
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"next_setting": "18:00:31 29-10-2013"
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},
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"category": "weather.sun",
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"last_changed": "23:24:33 28-10-2013",
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"state": "below_horizon"
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}
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/api/events/<event_type> - POST
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Fires an event with event_type
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optional parameter: event_data - JSON encoded object
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Example result:
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{
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"message": "Event download_file fired."
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}
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"""
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import json
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import threading
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import logging
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import re
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import os
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from BaseHTTPServer import BaseHTTPRequestHandler, HTTPServer
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from urlparse import urlparse, parse_qs
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import homeassistant as ha
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import homeassistant.util as util
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SERVER_PORT = 8123
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HTTP_OK = 200
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HTTP_CREATED = 201
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HTTP_MOVED_PERMANENTLY = 301
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HTTP_BAD_REQUEST = 400
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HTTP_UNAUTHORIZED = 401
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HTTP_NOT_FOUND = 404
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HTTP_METHOD_NOT_ALLOWED = 405
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HTTP_UNPROCESSABLE_ENTITY = 422
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URL_ROOT = "/"
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URL_CHANGE_STATE = "/change_state"
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URL_FIRE_EVENT = "/fire_event"
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URL_API_STATES = "/api/states"
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URL_API_STATES_CATEGORY = "/api/states/{}"
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URL_API_EVENTS = "/api/events"
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URL_API_EVENTS_EVENT = "/api/events/{}"
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URL_API_SERVICES = "/api/services"
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URL_API_SERVICES_SERVICE = "/api/services/{}/{}"
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URL_STATIC = "/static/{}"
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class HTTPInterface(threading.Thread):
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""" Provides an HTTP interface for Home Assistant. """
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# pylint: disable=too-many-arguments
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def __init__(self, bus, statemachine, api_password,
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server_port=None, server_host=None):
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threading.Thread.__init__(self)
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self.daemon = True
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if not server_port:
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server_port = SERVER_PORT
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# If no server host is given, accept all incoming requests
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if not server_host:
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server_host = '0.0.0.0'
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self.server = HTTPServer((server_host, server_port), RequestHandler)
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self.server.flash_message = None
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self.server.logger = logging.getLogger(__name__)
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self.server.bus = bus
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self.server.statemachine = statemachine
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self.server.api_password = api_password
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bus.listen_once_event(ha.EVENT_HOMEASSISTANT_START,
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lambda event: self.start())
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def run(self):
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""" Start the HTTP interface. """
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self.server.logger.info("Starting")
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self.server.serve_forever()
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class RequestHandler(BaseHTTPRequestHandler):
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""" Handles incoming HTTP requests """
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PATHS = [ # debug interface
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('GET', '/', '_handle_get_root'),
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('POST', re.compile(r'/change_state'), '_handle_change_state'),
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('POST', re.compile(r'/fire_event'), '_handle_fire_event'),
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('POST', re.compile(r'/call_service'), '_handle_call_service'),
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# /states
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('GET', '/api/states', '_handle_get_api_states'),
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('GET',
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re.compile(r'/api/states/(?P<category>[a-zA-Z\._0-9]+)'),
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'_handle_get_api_states_category'),
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('POST',
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re.compile(r'/api/states/(?P<category>[a-zA-Z\._0-9]+)'),
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'_handle_change_state'),
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# /events
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('GET', '/api/events', '_handle_get_api_events'),
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('POST',
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re.compile(r'/api/events/(?P<event_type>[a-zA-Z\._0-9]+)'),
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'_handle_fire_event'),
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# /services
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('GET', '/api/services', '_handle_get_api_services'),
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('POST',
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re.compile((r'/api/services/'
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r'(?P<domain>[a-zA-Z\._0-9]+)/'
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r'(?P<service>[a-zA-Z\._0-9]+)')),
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'_handle_call_service'),
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# Statis files
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('GET', re.compile(r'/static/(?P<file>[a-zA-Z\._\-0-9/]+)'),
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'_handle_get_static')
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]
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use_json = False
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def _handle_request(self, method): # pylint: disable=too-many-branches
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""" Does some common checks and calls appropriate method. """
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url = urlparse(self.path)
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# Read query input
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data = parse_qs(url.query)
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# Did we get post input ?
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content_length = int(self.headers.get('Content-Length', 0))
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if content_length:
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data.update(parse_qs(self.rfile.read(content_length)))
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try:
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api_password = data['api_password'][0]
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except KeyError:
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api_password = ''
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if url.path.startswith('/api/'):
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self.use_json = True
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# Var to keep track if we found a path that matched a handler but
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# the method was different
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path_matched_but_not_method = False
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# Var to hold the handler for this path and method if found
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handle_request_method = False
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# Check every handler to find matching result
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for t_method, t_path, t_handler in RequestHandler.PATHS:
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# we either do string-comparison or regular expression matching
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if isinstance(t_path, str):
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path_match = url.path == t_path
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else:
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# pylint: disable=maybe-no-member
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path_match = t_path.match(url.path)
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if path_match and method == t_method:
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# Call the method
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handle_request_method = getattr(self, t_handler)
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break
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elif path_match:
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path_matched_but_not_method = True
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# Did we find a handler for the incoming request?
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if handle_request_method:
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# Do not enforce api password for static files
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if handle_request_method == self._handle_get_static or \
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self._verify_api_password(api_password):
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handle_request_method(path_match, data)
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elif path_matched_but_not_method:
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self.send_response(HTTP_METHOD_NOT_ALLOWED)
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else:
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self.send_response(HTTP_NOT_FOUND)
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def do_GET(self): # pylint: disable=invalid-name
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""" GET request handler. """
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self._handle_request('GET')
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def do_POST(self): # pylint: disable=invalid-name
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""" POST request handler. """
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self._handle_request('POST')
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def _verify_api_password(self, api_password):
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""" Helper method to verify the API password
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and take action if incorrect. """
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if api_password == self.server.api_password:
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return True
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elif self.use_json:
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self._message(
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"API password missing or incorrect.", HTTP_UNAUTHORIZED)
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else:
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self.send_response(HTTP_OK)
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self.send_header('Content-type', 'text/html')
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self.end_headers()
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self.wfile.write((
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"<html>"
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"<head><title>Home Assistant</title>"
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"<link rel='stylesheet' type='text/css' "
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"href='/static/style.css'>"
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"<link rel='icon' href='/static/favicon.ico' "
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"type='image/x-icon' />"
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"</head>"
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"<body>"
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"<div class='container'>"
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"<form class='form-signin' action='{}' method='GET'>"
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"<input type='text' class='form-control' name='api_password' "
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"placeholder='API Password for Home Assistant' "
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"required autofocus>"
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"<button class='btn btn-lg btn-primary btn-block' "
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"type='submit'>Enter</button>"
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"</form>"
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"</div>"
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"</body></html>").format(self.path))
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return False
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# pylint: disable=unused-argument
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def _handle_get_root(self, path_match, data):
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""" Renders the debug interface. """
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write = lambda txt: self.wfile.write(txt+"\n")
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self.send_response(HTTP_OK)
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self.send_header('Content-type', 'text/html')
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self.end_headers()
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write(("<html>"
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"<head><title>Home Assistant</title>"
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"<link rel='stylesheet' type='text/css' "
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"href='/static/style.css'>"
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"<link rel='icon' href='/static/favicon.ico' "
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"type='image/x-icon' />"
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"</head>"
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"<body>"
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"<div class='container'>"
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"<div class='page-header'><h1>Home Assistant</h1></div>"
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))
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# Flash message support
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if self.server.flash_message:
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write(("<div class='row'><div class='col-xs-12'>"
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"<div class='alert alert-success'>"
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"{}</div></div></div>").format(self.server.flash_message))
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self.server.flash_message = None
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# Describe state machine:
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categories = []
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write(("<div class='row'>"
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"<div class='col-xs-12'>"
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"<div class='panel panel-primary'>"
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"<div class='panel-heading'><h2 class='panel-title'>"
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"States</h2></div>"
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"<form method='post' action='/change_state' "
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"class='form-change-state'>"
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"<input type='hidden' name='api_password' value='{}'>"
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"<table class='table'><tr>"
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"<th>Category</th><th>State</th>"
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"<th>Attributes</th><th>Last Changed</th>"
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"</tr>").format(self.server.api_password))
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for category in \
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sorted(self.server.statemachine.categories,
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key=lambda key: key.lower()):
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categories.append(category)
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state = self.server.statemachine.get_state(category)
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attributes = "<br>".join(
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["{}: {}".format(attr, state['attributes'][attr])
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for attr in state['attributes']])
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write(("<tr>"
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"<td>{}</td><td>{}</td><td>{}</td><td>{}</td>"
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"</tr>").format(
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category,
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state['state'],
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attributes,
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state['last_changed']))
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# Change state form
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write(("<tr><td><input name='category' class='form-control' "
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"placeholder='Category'></td>"
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"<td><input name='new_state' class='form-control' "
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"placeholder='New State'></td>"
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"<td><textarea rows='3' name='attributes' class='form-control' "
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"placeholder='State Attributes (JSON, optional)'>"
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"</textarea></td>"
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"<td><button type='submit' class='btn btn-default'>"
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"Set State</button></td></tr>"
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"</table></form></div>"
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"</div></div>"))
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# Describe bus/services:
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write(("<div class='row'>"
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"<div class='col-xs-6'>"
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"<div class='panel panel-primary'>"
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"<div class='panel-heading'><h2 class='panel-title'>"
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"Services</h2></div>"
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"<table class='table'>"
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"<tr><th>Domain</th><th>Service</th></tr>"))
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for domain, services in sorted(
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self.server.bus.services.items()):
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write("<tr><td>{}</td><td>{}</td></tr>".format(
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domain, ", ".join(services)))
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write(("</table></div></div>"
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"<div class='col-xs-6'>"
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"<div class='panel panel-primary'>"
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"<div class='panel-heading'><h2 class='panel-title'>"
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"Call Service</h2></div>"
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"<div class='panel-body'>"
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"<form method='post' action='/call_service' "
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"class='form-horizontal form-fire-event'>"
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"<input type='hidden' name='api_password' value='{}'>"
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"<div class='form-group'>"
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"<label for='domain' class='col-xs-3 control-label'>"
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"Domain</label>"
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"<div class='col-xs-9'>"
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"<input type='text' class='form-control' id='domain'"
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" name='domain' placeholder='Service Domain'>"
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"</div>"
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"</div>"
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"<div class='form-group'>"
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"<label for='service' class='col-xs-3 control-label'>"
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"Service</label>"
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"<div class='col-xs-9'>"
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"<input type='text' class='form-control' id='service'"
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" name='service' placeholder='Service name'>"
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"</div>"
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"</div>"
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"<div class='form-group'>"
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"<label for='service_data' class='col-xs-3 control-label'>"
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"Service data</label>"
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"<div class='col-xs-9'>"
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"<textarea rows='3' class='form-control' id='service_data'"
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" name='service_data' placeholder='Service Data "
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"(JSON, optional)'></textarea>"
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"</div>"
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"</div>"
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"<div class='form-group'>"
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"<div class='col-xs-offset-3 col-xs-9'>"
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"<button type='submit' class='btn btn-default'>"
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"Call Service</button>"
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"</div>"
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"</div>"
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"</form>"
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"</div></div></div>"
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"</div>").format(self.server.api_password))
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# Describe bus/events:
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write(("<div class='row'>"
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"<div class='col-xs-6'>"
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"<div class='panel panel-primary'>"
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"<div class='panel-heading'><h2 class='panel-title'>"
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"Events</h2></div>"
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"<table class='table'>"
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"<tr><th>Event</th><th>Listeners</th></tr>"))
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for event, listener_count in sorted(
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self.server.bus.event_listeners.items()):
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write("<tr><td>{}</td><td>{}</td></tr>".format(
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event, listener_count))
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write(("</table></div></div>"
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"<div class='col-xs-6'>"
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"<div class='panel panel-primary'>"
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"<div class='panel-heading'><h2 class='panel-title'>"
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"Fire Event</h2></div>"
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"<div class='panel-body'>"
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"<form method='post' action='/fire_event' "
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"class='form-horizontal form-fire-event'>"
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"<input type='hidden' name='api_password' value='{}'>"
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"<div class='form-group'>"
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"<label for='event_type' class='col-xs-3 control-label'>"
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"Event type</label>"
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"<div class='col-xs-9'>"
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"<input type='text' class='form-control' id='event_type'"
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" name='event_type' placeholder='Event Type'>"
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"</div>"
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"</div>"
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"<div class='form-group'>"
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"<label for='event_data' class='col-xs-3 control-label'>"
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"Event data</label>"
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"<div class='col-xs-9'>"
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"<textarea rows='3' class='form-control' id='event_data'"
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" name='event_data' placeholder='Event Data "
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"(JSON, optional)'></textarea>"
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"</div>"
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"</div>"
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"<div class='form-group'>"
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"<div class='col-xs-offset-3 col-xs-9'>"
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"<button type='submit' class='btn btn-default'>"
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"Fire Event</button>"
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"</div>"
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"</div>"
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"</form>"
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"</div></div></div>"
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"</div>").format(self.server.api_password))
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write("</div></body></html>")
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# pylint: disable=invalid-name
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def _handle_change_state(self, path_match, data):
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""" Handles updating the state of a category.
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This handles the following paths:
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/change_state
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/api/states/<category>
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"""
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try:
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try:
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category = path_match.group('category')
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except IndexError:
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# If group 'category' does not exist in path_match
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category = data['category'][0]
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new_state = data['new_state'][0]
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try:
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attributes = json.loads(data['attributes'][0])
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except KeyError:
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# Happens if key 'attributes' does not exist
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attributes = None
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# Write state
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self.server.statemachine.set_state(category,
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new_state,
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attributes)
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# Return state if json, else redirect to main page
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if self.use_json:
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state = self.server.statemachine.get_state(category)
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state['category'] = category
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self._write_json(state, status_code=HTTP_CREATED,
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location=
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URL_API_STATES_CATEGORY.format(category))
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else:
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|
self._message(
|
|
"State of {} changed to {}".format(category, 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>
|
|
"""
|
|
try:
|
|
try:
|
|
event_type = path_match.group('event_type')
|
|
except IndexError:
|
|
# If group event_type does not exist in path_match
|
|
event_type = data['event_type'][0]
|
|
|
|
try:
|
|
event_data = json.loads(data['event_data'][0])
|
|
except KeyError:
|
|
# Happens if key 'event_data' does not exist
|
|
event_data = None
|
|
|
|
self.server.bus.fire_event(event_type, event_data)
|
|
|
|
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.bus.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_states(self, path_match, data):
|
|
""" Returns the categories which state is being tracked. """
|
|
self._write_json({'categories': self.server.statemachine.categories})
|
|
|
|
# pylint: disable=unused-argument
|
|
def _handle_get_api_states_category(self, path_match, data):
|
|
""" Returns the state of a specific category. """
|
|
category = path_match.group('category')
|
|
|
|
state = self.server.statemachine.get_state(category)
|
|
|
|
if state:
|
|
state['category'] = category
|
|
|
|
self._write_json(state)
|
|
|
|
else:
|
|
# If category does not exist
|
|
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.bus.event_listeners})
|
|
|
|
def _handle_get_api_services(self, path_match, data):
|
|
""" Handles getting overview of services. """
|
|
self._write_json({'services': self.server.bus.services})
|
|
|
|
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)
|
|
|
|
# TODO: correct header for mime-type and caching
|
|
|
|
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))
|