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automator.py
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automator.py
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#!/usr/bin/env python3
import sys
assert sys.version >= '3.3', 'Please use Python 3.3 or higher.'
import argparse
import logging
import os
import ssl
import json
import asyncio
import aiohttp
import aiohttp.server
from urllib.parse import urlparse, parse_qsl
from aiohttp.multidict import MultiDict
def constant_time_equals(val1, val2):
if len(val1) != len(val2):
return False
result = 0
for x, y in zip(val1, val2):
result |= ord(x) ^ ord(y)
return result == 0
from spyrk import SparkCloud
class DataviewSparkIoAutomator():
def __init__(self, access_token = None, device_id = None):
self.spark = SparkCloud(access_token)
self.device_id = device_id
pass
def get_variable(self, varname):
return None
def call_function(self, name, arguments):
return getattr(self.spark.devices[self.device_id], name)(*arguments)
class DataviewRPCServer(aiohttp.server.ServerHttpProtocol):
def __init__(self, dispatch_functions, auth_token):
self.dispatch_functions = dispatch_functions
self.auth_token = auth_token
if len(auth_token) < 32:
raise Exception("auth_token is insufficently long")
super().__init__()
@asyncio.coroutine
def handle_request(self, message, payload):
print('method = {!r}; path = {!r}; version = {!r}'.format(
message.method, message.path, message.version))
if message.method == 'POST' and message.path == '/rpc':
if not 'Authorization' in message.headers:
response = aiohttp.Response(
self.writer, 401, http_version=message.version
)
response.add_header('Content-Length', '0')
response.add_header('WWW-Authenticate', 'Token')
response.send_headers()
return
authorization = message.headers.get('Authorization').split(' ')
if authorization[0] != 'Token' or not constant_time_equals(authorization[1], self.auth_token):
response = aiohttp.Response(
self.writer, 403, http_version=message.version
)
response.add_header('Content-Length', '0')
response.send_headers()
return
# authorization passed, process the request.
data = yield from payload.read()
response = aiohttp.Response(
self.writer, 200, http_version=message.version
)
result = self.process_request(data)
response.add_header('Content-Length', str(len(result)))
response.send_headers()
response.write(result)
else:
response = aiohttp.Response(
self.writer, 405, http_version=message.version
)
response.add_header('Accept', 'POST')
response.send_headers()
def connection_made(self, transport):
peername = transport.get_extra_info('peername')
print('Connection from {}'.format(peername))
self.transport = transport
super().connection_made(transport)
def process_request(self, data):
response = {}
message = data.decode()
try:
payload = json.loads(message)
except Exception:
response = {"jsonrpc": "2.0", "error": {"code": -32700, "message": "Parse error"}, "id": None}
return str.encode(json.dumps(response) + "\n")
try:
if payload['jsonrpc'] != '2.0':
response = {"jsonrpc": "2.0", "error": {"code": -32600, "message": "Invalid Request"}, "id": null}
return str.encode(json.dumps(response) + "\n")
response['jsonrpc'] = '2.0'
response['id'] = payload['id']
except Exception:
pass
if payload['method'] not in self.dispatch_functions:
response = {"jsonrpc": "2.0", "error": {"code": -32601, "message": "Method not found"}, "id": payload['id']},
return str.encode(json.dumps(response) + "\n")
#try:
if type(payload['params']) is dict:
response['result'] = self.dispatch_functions[payload['method']](**payload['params'])
else:
response['result'] = self.dispatch_functions[payload['method']](*payload['params'])
#except Exception as e:
# print(e)
# pass
return str.encode(json.dumps(response) + "\n")
ARGS = argparse.ArgumentParser(description="Run simple http server.")
ARGS.add_argument(
'--host', action="store", dest='host',
default='localhost', help='Host name')
ARGS.add_argument(
'--port', action="store", dest='port',
default=8080, type=int, help='Port number')
ARGS.add_argument(
'--tlscert', action="store", dest='certfile', help='TLS X.509 certificate file.')
ARGS.add_argument(
'--tlskey', action="store", dest='keyfile', help='TLS key file.')
def main():
args = ARGS.parse_args()
if ':' in args.host:
args.host, port = args.host.split(':', 1)
args.port = int(port)
here = os.path.join(os.path.dirname(__file__), 'tests')
if sys.version >= '3.4':
sslcontext = ssl.SSLContext(ssl.PROTOCOL_TLSv1_2)
else:
sslcontext = ssl.SSLContext(ssl.PROTOCOL_SSLv23)
sslcontext.load_cert_chain(args.certfile, args.keyfile)
loop = asyncio.get_event_loop()
c = DataviewSparkIoAutomator(os.environ.get('SPARK_ACCESS_TOKEN'), os.environ.get('SPARK_DEVICE_ID'));
f = loop.create_server(
lambda: DataviewRPCServer(
{'get_variable': lambda arguments: c.get_variable(arguments),
'call_function': lambda function, arguments: c.call_function(function, arguments),
}, os.environ.get('RPCSERVER_TOKEN')
),
args.host, args.port,
ssl = sslcontext)
svr = loop.run_until_complete(f)
socks = svr.sockets
print('Server started. Waiting for connections on ', socks[0].getsockname())
try:
loop.run_forever()
except KeyboardInterrupt:
pass
if __name__ == '__main__':
main()