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annotate planemo/lib/python3.7/site-packages/requests_toolbelt/utils/user_agent.py @ 1:56ad4e20f292 draft

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"planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
author guerler
date Fri, 31 Jul 2020 00:32:28 -0400
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1
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1 # -*- coding: utf-8 -*-
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2 import collections
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3 import platform
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4 import sys
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5
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6
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7 def user_agent(name, version, extras=None):
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8 """Return an internet-friendly user_agent string.
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9
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10 The majority of this code has been wilfully stolen from the equivalent
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11 function in Requests.
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12
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13 :param name: The intended name of the user-agent, e.g. "python-requests".
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14 :param version: The version of the user-agent, e.g. "0.0.1".
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15 :param extras: List of two-item tuples that are added to the user-agent
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16 string.
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17 :returns: Formatted user-agent string
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18 :rtype: str
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19 """
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20 if extras is None:
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21 extras = []
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22
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23 return UserAgentBuilder(
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24 name, version
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25 ).include_extras(
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26 extras
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27 ).include_implementation(
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28 ).include_system().build()
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29
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30
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31 class UserAgentBuilder(object):
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32 """Class to provide a greater level of control than :func:`user_agent`.
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33
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34 This is used by :func:`user_agent` to build its User-Agent string.
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35
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36 .. code-block:: python
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37
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38 user_agent_str = UserAgentBuilder(
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39 name='requests-toolbelt',
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40 version='17.4.0',
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41 ).include_implementation(
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42 ).include_system(
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43 ).include_extras([
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44 ('requests', '2.14.2'),
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45 ('urllib3', '1.21.2'),
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46 ]).build()
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47
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48 """
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49
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50 format_string = '%s/%s'
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51
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52 def __init__(self, name, version):
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53 """Initialize our builder with the name and version of our user agent.
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54
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55 :param str name:
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56 Name of our user-agent.
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57 :param str version:
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58 The version string for user-agent.
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59 """
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60 self._pieces = collections.deque([(name, version)])
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61
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62 def build(self):
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63 """Finalize the User-Agent string.
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64
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65 :returns:
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66 Formatted User-Agent string.
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67 :rtype:
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68 str
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69 """
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70 return " ".join([self.format_string % piece for piece in self._pieces])
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71
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72 def include_extras(self, extras):
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73 """Include extra portions of the User-Agent.
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74
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75 :param list extras:
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76 list of tuples of extra-name and extra-version
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77 """
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78 if any(len(extra) != 2 for extra in extras):
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79 raise ValueError('Extras should be a sequence of two item tuples.')
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80
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81 self._pieces.extend(extras)
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82 return self
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83
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84 def include_implementation(self):
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85 """Append the implementation string to the user-agent string.
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86
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87 This adds the the information that you're using CPython 2.7.13 to the
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88 User-Agent.
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89 """
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90 self._pieces.append(_implementation_tuple())
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91 return self
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92
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93 def include_system(self):
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94 """Append the information about the Operating System."""
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95 self._pieces.append(_platform_tuple())
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96 return self
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97
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98
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99 def _implementation_tuple():
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100 """Return the tuple of interpreter name and version.
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101
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102 Returns a string that provides both the name and the version of the Python
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103 implementation currently running. For example, on CPython 2.7.5 it will
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104 return "CPython/2.7.5".
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105
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106 This function works best on CPython and PyPy: in particular, it probably
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107 doesn't work for Jython or IronPython. Future investigation should be done
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108 to work out the correct shape of the code for those platforms.
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109 """
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110 implementation = platform.python_implementation()
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111
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112 if implementation == 'CPython':
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113 implementation_version = platform.python_version()
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114 elif implementation == 'PyPy':
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115 implementation_version = '%s.%s.%s' % (sys.pypy_version_info.major,
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116 sys.pypy_version_info.minor,
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117 sys.pypy_version_info.micro)
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118 if sys.pypy_version_info.releaselevel != 'final':
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119 implementation_version = ''.join([
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120 implementation_version, sys.pypy_version_info.releaselevel
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121 ])
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122 elif implementation == 'Jython':
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123 implementation_version = platform.python_version() # Complete Guess
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124 elif implementation == 'IronPython':
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125 implementation_version = platform.python_version() # Complete Guess
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126 else:
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127 implementation_version = 'Unknown'
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128
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129 return (implementation, implementation_version)
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130
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131
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132 def _implementation_string():
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133 return "%s/%s" % _implementation_tuple()
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134
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135
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136 def _platform_tuple():
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137 try:
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138 p_system = platform.system()
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139 p_release = platform.release()
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140 except IOError:
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141 p_system = 'Unknown'
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142 p_release = 'Unknown'
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143 return (p_system, p_release)