Coverage for /pythoncovmergedfiles/medio/medio/usr/local/lib/python3.8/site-packages/urllib3/util/proxy.py: 21%

1from .ssl_ import create_urllib3_context, resolve_cert_reqs, resolve_ssl_version 

2 

3 

4def connection_requires_http_tunnel( 

5 proxy_url=None, proxy_config=None, destination_scheme=None 

6): 

7 """ 

8 Returns True if the connection requires an HTTP CONNECT through the proxy. 

9 

10 :param URL proxy_url: 

11 URL of the proxy. 

12 :param ProxyConfig proxy_config: 

13 Proxy configuration from poolmanager.py 

14 :param str destination_scheme: 

15 The scheme of the destination. (i.e https, http, etc) 

16 """ 

17 # If we're not using a proxy, no way to use a tunnel. 

18 if proxy_url is None: 

19 return False 

20 

21 # HTTP destinations never require tunneling, we always forward. 

22 if destination_scheme == "http": 

23 return False 

24 

25 # Support for forwarding with HTTPS proxies and HTTPS destinations. 

26 if ( 

27 proxy_url.scheme == "https" 

28 and proxy_config 

29 and proxy_config.use_forwarding_for_https 

30 ): 

31 return False 

32 

33 # Otherwise always use a tunnel. 

34 return True 

35 

36 

37def create_proxy_ssl_context( 

38 ssl_version, cert_reqs, ca_certs=None, ca_cert_dir=None, ca_cert_data=None 

39): 

40 """ 

41 Generates a default proxy ssl context if one hasn't been provided by the 

42 user. 

43 """ 

44 ssl_context = create_urllib3_context( 

45 ssl_version=resolve_ssl_version(ssl_version), 

46 cert_reqs=resolve_cert_reqs(cert_reqs), 

47 ) 

48 

49 if ( 

50 not ca_certs 

51 and not ca_cert_dir 

52 and not ca_cert_data 

53 and hasattr(ssl_context, "load_default_certs") 

54 ): 

55 ssl_context.load_default_certs() 

56 

57 return ssl_context