Source Code for Module caldavclientlibrary.client.httpshandler

 1  ## 
 2  # Copyright (c) 2010-2016 Apple Inc. All rights reserved. 
 3  # 
 4  # Licensed under the Apache License, Version 2.0 (the "License"); 
 5  # you may not use this file except in compliance with the License. 
 6  # You may obtain a copy of the License at 
 7  # 
 8  # http://www.apache.org/licenses/LICENSE-2.0 
 9  # 
10  # Unless required by applicable law or agreed to in writing, software 
11  # distributed under the License is distributed on an "AS IS" BASIS, 
12  # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 
13  # See the License for the specific language governing permissions and 
14  # limitations under the License. 
15  ## 
16   
17  import httplib 
18  import socket 
19  import ssl as sslmodule 
20   
21 -class HTTPSConnection_SSLv3(httplib.HTTPSConnection): 
22      "This class allows communication via SSL." 
23   
24 -    def connect(self): 
25          "Connect to a host on a given (SSL) port." 
26   
27          sock = socket.create_connection((self.host, self.port), self.timeout) 
28          self.sock = sslmodule.wrap_socket(sock, self.key_file, self.cert_file, ssl_version=sslmodule.PROTOCOL_SSLv3) 
29   
30  https_v23_connects = set() 
31  https_v3_connects = set() 
32   
33 -def SmartHTTPConnection(host, port, ssl): 
34       
35      def trySSL(cls, ): 
36          connect = cls(host, port) 
37          connect.connect() 
38          return connect 
39           
40      if ssl: 
41          if (host, port) in https_v3_connects: 
42              try: 
43                  return trySSL(HTTPSConnection_SSLv3) 
44              except: 
45                  https_v3_connects.remove((host, port)) 
46          elif (host, port) in https_v23_connects: 
47              try: 
48                  return trySSL(httplib.HTTPSConnection) 
49              except: 
50                  https_v23_connects.remove((host, port)) 
51           
52          try: 
53              https_v3_connects.add((host, port)) 
54              return trySSL(HTTPSConnection_SSLv3) 
55          except: 
56              https_v3_connects.remove((host, port)) 
57               
58          try: 
59              https_v23_connects.add((host, port)) 
60              return trySSL(httplib.HTTPSConnection) 
61          except: 
62              https_v23_connects.remove((host, port)) 
63           
64          raise RuntimeError("Cannot connect via with SSLv23 or SSLv3") 
65      else: 
66          connect = httplib.HTTPConnection(host, port) 
67          connect.connect() 
68          return connect 
69