1# Copyright 2018 Espressif Systems (Shanghai) PTE LTD
2#
3# Licensed under the Apache License, Version 2.0 (the "License");
4# you may not use this file except in compliance with the License.
5# You may obtain a copy of the License at
6#
7#     http://www.apache.org/licenses/LICENSE-2.0
8#
9# Unless required by applicable law or agreed to in writing, software
10# distributed under the License is distributed on an "AS IS" BASIS,
11# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12# See the License for the specific language governing permissions and
13# limitations under the License.
14#
15
16from __future__ import print_function
17
18import socket
19
20from future.utils import tobytes
21
22try:
23    from http.client import HTTPConnection, HTTPSConnection
24except ImportError:
25    # Python 2 fallback
26    from httplib import HTTPConnection, HTTPSConnection
27
28from .transport import Transport
29
30
31class Transport_HTTP(Transport):
32    def __init__(self, hostname, ssl_context=None):
33        try:
34            socket.gethostbyname(hostname.split(':')[0])
35        except socket.gaierror:
36            raise RuntimeError('Unable to resolve hostname :' + hostname)
37
38        if ssl_context is None:
39            self.conn = HTTPConnection(hostname, timeout=60)
40        else:
41            self.conn = HTTPSConnection(hostname, context=ssl_context, timeout=60)
42        try:
43            print('Connecting to ' + hostname)
44            self.conn.connect()
45        except Exception as err:
46            raise RuntimeError('Connection Failure : ' + str(err))
47        self.headers = {'Content-type': 'application/x-www-form-urlencoded','Accept': 'text/plain'}
48
49    def _send_post_request(self, path, data):
50        try:
51            self.conn.request('POST', path, tobytes(data), self.headers)
52            response = self.conn.getresponse()
53            if response.status == 200:
54                return response.read().decode('latin-1')
55        except Exception as err:
56            raise RuntimeError('Connection Failure : ' + str(err))
57        raise RuntimeError('Server responded with error code ' + str(response.status))
58
59    def send_data(self, ep_name, data):
60        return self._send_post_request('/' + ep_name, data)
61