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annotate env/lib/python3.7/site-packages/requests_toolbelt/adapters/source.py @ 0:26e78fe6e8c4 draft

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"planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
author shellac
date Sat, 02 May 2020 07:14:21 -0400
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1 # -*- coding: utf-8 -*-
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2 """
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3 requests_toolbelt.source_adapter
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4 ================================
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5
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6 This file contains an implementation of the SourceAddressAdapter originally
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7 demonstrated on the Requests GitHub page.
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8 """
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9 from requests.adapters import HTTPAdapter
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10
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11 from .._compat import poolmanager, basestring
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12
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13
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14 class SourceAddressAdapter(HTTPAdapter):
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15 """
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16 A Source Address Adapter for Python Requests that enables you to choose the
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17 local address to bind to. This allows you to send your HTTP requests from a
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18 specific interface and IP address.
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19
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20 Two address formats are accepted. The first is a string: this will set the
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21 local IP address to the address given in the string, and will also choose a
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22 semi-random high port for the local port number.
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23
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24 The second is a two-tuple of the form (ip address, port): for example,
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25 ``('10.10.10.10', 8999)``. This will set the local IP address to the first
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26 element, and the local port to the second element. If ``0`` is used as the
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27 port number, a semi-random high port will be selected.
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28
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29 .. warning:: Setting an explicit local port can have negative interactions
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30 with connection-pooling in Requests: in particular, it risks
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31 the possibility of getting "Address in use" errors. The
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32 string-only argument is generally preferred to the tuple-form.
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33
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34 Example usage:
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35
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36 .. code-block:: python
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37
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38 import requests
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39 from requests_toolbelt.adapters.source import SourceAddressAdapter
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40
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41 s = requests.Session()
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42 s.mount('http://', SourceAddressAdapter('10.10.10.10'))
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43 s.mount('https://', SourceAddressAdapter(('10.10.10.10', 8999)))
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44 """
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45 def __init__(self, source_address, **kwargs):
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46 if isinstance(source_address, basestring):
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47 self.source_address = (source_address, 0)
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48 elif isinstance(source_address, tuple):
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49 self.source_address = source_address
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50 else:
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51 raise TypeError(
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52 "source_address must be IP address string or (ip, port) tuple"
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53 )
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54
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55 super(SourceAddressAdapter, self).__init__(**kwargs)
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56
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57 def init_poolmanager(self, connections, maxsize, block=False):
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58 self.poolmanager = poolmanager.PoolManager(
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59 num_pools=connections,
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60 maxsize=maxsize,
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61 block=block,
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62 source_address=self.source_address)
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63
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64 def proxy_manager_for(self, *args, **kwargs):
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65 kwargs['source_address'] = self.source_address
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66 return super(SourceAddressAdapter, self).proxy_manager_for(
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67 *args, **kwargs)