Mercurial > repos > guerler > springsuite

annotate planemo/lib/python3.7/site-packages/urllib3/util/request.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 from __future__ import absolute_import
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2 from base64 import b64encode
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3
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4 from ..packages.six import b, integer_types
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5 from ..exceptions import UnrewindableBodyError
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6
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7 ACCEPT_ENCODING = "gzip,deflate"
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8 try:
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9 import brotli as _unused_module_brotli # noqa: F401
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10 except ImportError:
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11 pass
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12 else:
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13 ACCEPT_ENCODING += ",br"
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14
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15 _FAILEDTELL = object()
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16
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17
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18 def make_headers(
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19 keep_alive=None,
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20 accept_encoding=None,
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21 user_agent=None,
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22 basic_auth=None,
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23 proxy_basic_auth=None,
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24 disable_cache=None,
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25 ):
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26 """
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27 Shortcuts for generating request headers.
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28
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29 :param keep_alive:
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30 If ``True``, adds 'connection: keep-alive' header.
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31
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32 :param accept_encoding:
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33 Can be a boolean, list, or string.
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34 ``True`` translates to 'gzip,deflate'.
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35 List will get joined by comma.
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36 String will be used as provided.
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37
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38 :param user_agent:
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39 String representing the user-agent you want, such as
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40 "python-urllib3/0.6"
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41
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42 :param basic_auth:
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43 Colon-separated username:password string for 'authorization: basic ...'
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44 auth header.
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45
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46 :param proxy_basic_auth:
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47 Colon-separated username:password string for 'proxy-authorization: basic ...'
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48 auth header.
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49
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50 :param disable_cache:
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51 If ``True``, adds 'cache-control: no-cache' header.
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52
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53 Example::
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54
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55 >>> make_headers(keep_alive=True, user_agent="Batman/1.0")
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56 {'connection': 'keep-alive', 'user-agent': 'Batman/1.0'}
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57 >>> make_headers(accept_encoding=True)
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58 {'accept-encoding': 'gzip,deflate'}
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59 """
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60 headers = {}
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61 if accept_encoding:
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62 if isinstance(accept_encoding, str):
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63 pass
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64 elif isinstance(accept_encoding, list):
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65 accept_encoding = ",".join(accept_encoding)
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66 else:
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67 accept_encoding = ACCEPT_ENCODING
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68 headers["accept-encoding"] = accept_encoding
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69
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70 if user_agent:
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71 headers["user-agent"] = user_agent
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72
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73 if keep_alive:
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74 headers["connection"] = "keep-alive"
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75
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76 if basic_auth:
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77 headers["authorization"] = "Basic " + b64encode(b(basic_auth)).decode("utf-8")
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78
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79 if proxy_basic_auth:
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80 headers["proxy-authorization"] = "Basic " + b64encode(
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81 b(proxy_basic_auth)
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82 ).decode("utf-8")
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83
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84 if disable_cache:
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85 headers["cache-control"] = "no-cache"
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86
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87 return headers
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88
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89
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90 def set_file_position(body, pos):
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91 """
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92 If a position is provided, move file to that point.
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93 Otherwise, we'll attempt to record a position for future use.
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94 """
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95 if pos is not None:
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96 rewind_body(body, pos)
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97 elif getattr(body, "tell", None) is not None:
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98 try:
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99 pos = body.tell()
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100 except (IOError, OSError):
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101 # This differentiates from None, allowing us to catch
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102 # a failed `tell()` later when trying to rewind the body.
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103 pos = _FAILEDTELL
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104
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105 return pos
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106
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107
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108 def rewind_body(body, body_pos):
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109 """
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110 Attempt to rewind body to a certain position.
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111 Primarily used for request redirects and retries.
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112
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113 :param body:
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114 File-like object that supports seek.
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115
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116 :param int pos:
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117 Position to seek to in file.
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118 """
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119 body_seek = getattr(body, "seek", None)
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120 if body_seek is not None and isinstance(body_pos, integer_types):
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121 try:
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122 body_seek(body_pos)
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123 except (IOError, OSError):
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124 raise UnrewindableBodyError(
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125 "An error occurred when rewinding request body for redirect/retry."
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126 )
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127 elif body_pos is _FAILEDTELL:
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128 raise UnrewindableBodyError(
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129 "Unable to record file position for rewinding "
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130 "request body during a redirect/retry."
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
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131 )
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
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132 else:
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
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133 raise ValueError(
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
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134 "body_pos must be of type integer, instead it was %s." % type(body_pos)
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
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135 )