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annotate env/lib/python3.7/site-packages/requests_toolbelt/adapters/ssl.py @ 2:6af9afd405e9 draft

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"planemo upload commit 0a63dd5f4d38a1f6944587f52a8cd79874177fc1"
author shellac
date Thu, 14 May 2020 14:56:58 -0400
parents 26e78fe6e8c4
children
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1 # -*- coding: utf-8 -*-
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2 """
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3
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4 requests_toolbelt.ssl_adapter
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5 =============================
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6
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7 This file contains an implementation of the SSLAdapter originally demonstrated
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8 in this blog post:
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9 https://lukasa.co.uk/2013/01/Choosing_SSL_Version_In_Requests/
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10
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11 """
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12 import requests
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13
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14 from requests.adapters import HTTPAdapter
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16 from .._compat import poolmanager
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17
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18
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19 class SSLAdapter(HTTPAdapter):
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20 """
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21 A HTTPS Adapter for Python Requests that allows the choice of the SSL/TLS
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22 version negotiated by Requests. This can be used either to enforce the
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23 choice of high-security TLS versions (where supported), or to work around
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24 misbehaving servers that fail to correctly negotiate the default TLS
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25 version being offered.
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26
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27 Example usage:
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28
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29 >>> import requests
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30 >>> import ssl
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31 >>> from requests_toolbelt import SSLAdapter
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32 >>> s = requests.Session()
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33 >>> s.mount('https://', SSLAdapter(ssl.PROTOCOL_TLSv1))
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34
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35 You can replace the chosen protocol with any that are available in the
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36 default Python SSL module. All subsequent requests that match the adapter
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37 prefix will use the chosen SSL version instead of the default.
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38
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39 This adapter will also attempt to change the SSL/TLS version negotiated by
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40 Requests when using a proxy. However, this may not always be possible:
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41 prior to Requests v2.4.0 the adapter did not have access to the proxy setup
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42 code. In earlier versions of Requests, this adapter will not function
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43 properly when used with proxies.
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44 """
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45
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46 __attrs__ = HTTPAdapter.__attrs__ + ['ssl_version']
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47
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48 def __init__(self, ssl_version=None, **kwargs):
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49 self.ssl_version = ssl_version
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50
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51 super(SSLAdapter, self).__init__(**kwargs)
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52
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53 def init_poolmanager(self, connections, maxsize, block=False):
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54 self.poolmanager = poolmanager.PoolManager(
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55 num_pools=connections,
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56 maxsize=maxsize,
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57 block=block,
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58 ssl_version=self.ssl_version)
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59
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60 if requests.__build__ >= 0x020400:
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61 # Earlier versions of requests either don't have this method or, worse,
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62 # don't allow passing arbitrary keyword arguments. As a result, only
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63 # conditionally define this method.
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64 def proxy_manager_for(self, *args, **kwargs):
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65 kwargs['ssl_version'] = self.ssl_version
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66 return super(SSLAdapter, self).proxy_manager_for(*args, **kwargs)