Mercurial > repos > shellac > sam_consensus_v3
annotate env/lib/python3.9/site-packages/requests/utils.py @ 0:4f3585e2f14b draft default tip
"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
author | shellac |
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date | Mon, 22 Mar 2021 18:12:50 +0000 |
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1 # -*- coding: utf-8 -*- |
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2 |
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3 """ |
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4 requests.utils |
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5 ~~~~~~~~~~~~~~ |
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6 |
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7 This module provides utility functions that are used within Requests |
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8 that are also useful for external consumption. |
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9 """ |
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10 |
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11 import codecs |
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12 import contextlib |
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13 import io |
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14 import os |
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15 import re |
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16 import socket |
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17 import struct |
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18 import sys |
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19 import tempfile |
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20 import warnings |
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21 import zipfile |
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22 from collections import OrderedDict |
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23 |
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24 from .__version__ import __version__ |
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25 from . import certs |
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26 # to_native_string is unused here, but imported here for backwards compatibility |
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27 from ._internal_utils import to_native_string |
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28 from .compat import parse_http_list as _parse_list_header |
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29 from .compat import ( |
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30 quote, urlparse, bytes, str, unquote, getproxies, |
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31 proxy_bypass, urlunparse, basestring, integer_types, is_py3, |
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32 proxy_bypass_environment, getproxies_environment, Mapping) |
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33 from .cookies import cookiejar_from_dict |
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34 from .structures import CaseInsensitiveDict |
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35 from .exceptions import ( |
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36 InvalidURL, InvalidHeader, FileModeWarning, UnrewindableBodyError) |
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37 |
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38 NETRC_FILES = ('.netrc', '_netrc') |
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39 |
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40 DEFAULT_CA_BUNDLE_PATH = certs.where() |
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41 |
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42 DEFAULT_PORTS = {'http': 80, 'https': 443} |
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43 |
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44 |
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45 if sys.platform == 'win32': |
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46 # provide a proxy_bypass version on Windows without DNS lookups |
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47 |
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48 def proxy_bypass_registry(host): |
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49 try: |
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50 if is_py3: |
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51 import winreg |
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52 else: |
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53 import _winreg as winreg |
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54 except ImportError: |
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55 return False |
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56 |
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57 try: |
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58 internetSettings = winreg.OpenKey(winreg.HKEY_CURRENT_USER, |
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59 r'Software\Microsoft\Windows\CurrentVersion\Internet Settings') |
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60 # ProxyEnable could be REG_SZ or REG_DWORD, normalizing it |
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61 proxyEnable = int(winreg.QueryValueEx(internetSettings, |
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62 'ProxyEnable')[0]) |
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63 # ProxyOverride is almost always a string |
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64 proxyOverride = winreg.QueryValueEx(internetSettings, |
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65 'ProxyOverride')[0] |
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66 except OSError: |
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67 return False |
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68 if not proxyEnable or not proxyOverride: |
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69 return False |
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70 |
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71 # make a check value list from the registry entry: replace the |
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72 # '<local>' string by the localhost entry and the corresponding |
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73 # canonical entry. |
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74 proxyOverride = proxyOverride.split(';') |
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75 # now check if we match one of the registry values. |
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76 for test in proxyOverride: |
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77 if test == '<local>': |
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78 if '.' not in host: |
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79 return True |
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80 test = test.replace(".", r"\.") # mask dots |
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81 test = test.replace("*", r".*") # change glob sequence |
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82 test = test.replace("?", r".") # change glob char |
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83 if re.match(test, host, re.I): |
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84 return True |
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85 return False |
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86 |
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87 def proxy_bypass(host): # noqa |
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88 """Return True, if the host should be bypassed. |
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89 |
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90 Checks proxy settings gathered from the environment, if specified, |
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91 or the registry. |
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92 """ |
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93 if getproxies_environment(): |
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94 return proxy_bypass_environment(host) |
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95 else: |
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96 return proxy_bypass_registry(host) |
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97 |
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98 |
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99 def dict_to_sequence(d): |
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100 """Returns an internal sequence dictionary update.""" |
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101 |
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102 if hasattr(d, 'items'): |
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103 d = d.items() |
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104 |
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105 return d |
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106 |
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107 |
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108 def super_len(o): |
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109 total_length = None |
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110 current_position = 0 |
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111 |
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112 if hasattr(o, '__len__'): |
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113 total_length = len(o) |
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114 |
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115 elif hasattr(o, 'len'): |
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116 total_length = o.len |
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117 |
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118 elif hasattr(o, 'fileno'): |
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119 try: |
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120 fileno = o.fileno() |
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121 except io.UnsupportedOperation: |
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122 pass |
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123 else: |
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124 total_length = os.fstat(fileno).st_size |
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125 |
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126 # Having used fstat to determine the file length, we need to |
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127 # confirm that this file was opened up in binary mode. |
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128 if 'b' not in o.mode: |
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129 warnings.warn(( |
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130 "Requests has determined the content-length for this " |
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131 "request using the binary size of the file: however, the " |
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132 "file has been opened in text mode (i.e. without the 'b' " |
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133 "flag in the mode). This may lead to an incorrect " |
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134 "content-length. In Requests 3.0, support will be removed " |
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135 "for files in text mode."), |
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136 FileModeWarning |
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137 ) |
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138 |
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139 if hasattr(o, 'tell'): |
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140 try: |
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141 current_position = o.tell() |
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142 except (OSError, IOError): |
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143 # This can happen in some weird situations, such as when the file |
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144 # is actually a special file descriptor like stdin. In this |
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145 # instance, we don't know what the length is, so set it to zero and |
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146 # let requests chunk it instead. |
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147 if total_length is not None: |
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148 current_position = total_length |
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149 else: |
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150 if hasattr(o, 'seek') and total_length is None: |
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151 # StringIO and BytesIO have seek but no useable fileno |
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152 try: |
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153 # seek to end of file |
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154 o.seek(0, 2) |
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155 total_length = o.tell() |
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156 |
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157 # seek back to current position to support |
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158 # partially read file-like objects |
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159 o.seek(current_position or 0) |
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160 except (OSError, IOError): |
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161 total_length = 0 |
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162 |
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163 if total_length is None: |
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164 total_length = 0 |
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165 |
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166 return max(0, total_length - current_position) |
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167 |
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168 |
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169 def get_netrc_auth(url, raise_errors=False): |
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170 """Returns the Requests tuple auth for a given url from netrc.""" |
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171 |
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172 netrc_file = os.environ.get('NETRC') |
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173 if netrc_file is not None: |
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174 netrc_locations = (netrc_file,) |
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175 else: |
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176 netrc_locations = ('~/{}'.format(f) for f in NETRC_FILES) |
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177 |
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178 try: |
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179 from netrc import netrc, NetrcParseError |
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180 |
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181 netrc_path = None |
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182 |
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183 for f in netrc_locations: |
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184 try: |
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185 loc = os.path.expanduser(f) |
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186 except KeyError: |
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187 # os.path.expanduser can fail when $HOME is undefined and |
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188 # getpwuid fails. See https://bugs.python.org/issue20164 & |
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189 # https://github.com/psf/requests/issues/1846 |
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190 return |
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191 |
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192 if os.path.exists(loc): |
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193 netrc_path = loc |
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194 break |
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195 |
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196 # Abort early if there isn't one. |
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197 if netrc_path is None: |
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198 return |
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199 |
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200 ri = urlparse(url) |
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201 |
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202 # Strip port numbers from netloc. This weird `if...encode`` dance is |
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203 # used for Python 3.2, which doesn't support unicode literals. |
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204 splitstr = b':' |
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205 if isinstance(url, str): |
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206 splitstr = splitstr.decode('ascii') |
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207 host = ri.netloc.split(splitstr)[0] |
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208 |
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209 try: |
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210 _netrc = netrc(netrc_path).authenticators(host) |
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211 if _netrc: |
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212 # Return with login / password |
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213 login_i = (0 if _netrc[0] else 1) |
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214 return (_netrc[login_i], _netrc[2]) |
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215 except (NetrcParseError, IOError): |
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216 # If there was a parsing error or a permissions issue reading the file, |
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217 # we'll just skip netrc auth unless explicitly asked to raise errors. |
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218 if raise_errors: |
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219 raise |
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220 |
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221 # App Engine hackiness. |
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222 except (ImportError, AttributeError): |
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223 pass |
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224 |
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225 |
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226 def guess_filename(obj): |
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227 """Tries to guess the filename of the given object.""" |
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228 name = getattr(obj, 'name', None) |
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229 if (name and isinstance(name, basestring) and name[0] != '<' and |
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230 name[-1] != '>'): |
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231 return os.path.basename(name) |
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232 |
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233 |
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234 def extract_zipped_paths(path): |
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235 """Replace nonexistent paths that look like they refer to a member of a zip |
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236 archive with the location of an extracted copy of the target, or else |
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237 just return the provided path unchanged. |
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238 """ |
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239 if os.path.exists(path): |
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240 # this is already a valid path, no need to do anything further |
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241 return path |
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242 |
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243 # find the first valid part of the provided path and treat that as a zip archive |
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244 # assume the rest of the path is the name of a member in the archive |
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245 archive, member = os.path.split(path) |
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246 while archive and not os.path.exists(archive): |
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247 archive, prefix = os.path.split(archive) |
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248 member = '/'.join([prefix, member]) |
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249 |
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250 if not zipfile.is_zipfile(archive): |
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251 return path |
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252 |
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253 zip_file = zipfile.ZipFile(archive) |
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254 if member not in zip_file.namelist(): |
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255 return path |
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256 |
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257 # we have a valid zip archive and a valid member of that archive |
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258 tmp = tempfile.gettempdir() |
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259 extracted_path = os.path.join(tmp, *member.split('/')) |
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260 if not os.path.exists(extracted_path): |
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261 extracted_path = zip_file.extract(member, path=tmp) |
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262 |
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263 return extracted_path |
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264 |
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265 |
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266 def from_key_val_list(value): |
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267 """Take an object and test to see if it can be represented as a |
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268 dictionary. Unless it can not be represented as such, return an |
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269 OrderedDict, e.g., |
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270 |
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271 :: |
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272 |
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273 >>> from_key_val_list([('key', 'val')]) |
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274 OrderedDict([('key', 'val')]) |
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275 >>> from_key_val_list('string') |
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276 Traceback (most recent call last): |
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277 ... |
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278 ValueError: cannot encode objects that are not 2-tuples |
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279 >>> from_key_val_list({'key': 'val'}) |
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280 OrderedDict([('key', 'val')]) |
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281 |
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282 :rtype: OrderedDict |
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283 """ |
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284 if value is None: |
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285 return None |
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286 |
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287 if isinstance(value, (str, bytes, bool, int)): |
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288 raise ValueError('cannot encode objects that are not 2-tuples') |
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289 |
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290 return OrderedDict(value) |
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291 |
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292 |
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293 def to_key_val_list(value): |
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294 """Take an object and test to see if it can be represented as a |
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295 dictionary. If it can be, return a list of tuples, e.g., |
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296 |
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297 :: |
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298 |
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299 >>> to_key_val_list([('key', 'val')]) |
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300 [('key', 'val')] |
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301 >>> to_key_val_list({'key': 'val'}) |
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302 [('key', 'val')] |
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303 >>> to_key_val_list('string') |
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304 Traceback (most recent call last): |
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305 ... |
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306 ValueError: cannot encode objects that are not 2-tuples |
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307 |
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308 :rtype: list |
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309 """ |
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310 if value is None: |
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311 return None |
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312 |
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313 if isinstance(value, (str, bytes, bool, int)): |
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314 raise ValueError('cannot encode objects that are not 2-tuples') |
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315 |
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316 if isinstance(value, Mapping): |
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317 value = value.items() |
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318 |
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319 return list(value) |
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320 |
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321 |
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322 # From mitsuhiko/werkzeug (used with permission). |
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323 def parse_list_header(value): |
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324 """Parse lists as described by RFC 2068 Section 2. |
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325 |
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326 In particular, parse comma-separated lists where the elements of |
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327 the list may include quoted-strings. A quoted-string could |
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328 contain a comma. A non-quoted string could have quotes in the |
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329 middle. Quotes are removed automatically after parsing. |
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330 |
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331 It basically works like :func:`parse_set_header` just that items |
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332 may appear multiple times and case sensitivity is preserved. |
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333 |
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334 The return value is a standard :class:`list`: |
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335 |
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336 >>> parse_list_header('token, "quoted value"') |
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337 ['token', 'quoted value'] |
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338 |
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339 To create a header from the :class:`list` again, use the |
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340 :func:`dump_header` function. |
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341 |
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342 :param value: a string with a list header. |
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343 :return: :class:`list` |
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344 :rtype: list |
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345 """ |
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346 result = [] |
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347 for item in _parse_list_header(value): |
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348 if item[:1] == item[-1:] == '"': |
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349 item = unquote_header_value(item[1:-1]) |
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350 result.append(item) |
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351 return result |
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352 |
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353 |
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354 # From mitsuhiko/werkzeug (used with permission). |
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355 def parse_dict_header(value): |
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356 """Parse lists of key, value pairs as described by RFC 2068 Section 2 and |
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357 convert them into a python dict: |
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358 |
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359 >>> d = parse_dict_header('foo="is a fish", bar="as well"') |
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360 >>> type(d) is dict |
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361 True |
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362 >>> sorted(d.items()) |
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363 [('bar', 'as well'), ('foo', 'is a fish')] |
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364 |
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365 If there is no value for a key it will be `None`: |
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366 |
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367 >>> parse_dict_header('key_without_value') |
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368 {'key_without_value': None} |
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369 |
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370 To create a header from the :class:`dict` again, use the |
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371 :func:`dump_header` function. |
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372 |
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373 :param value: a string with a dict header. |
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374 :return: :class:`dict` |
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375 :rtype: dict |
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376 """ |
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377 result = {} |
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378 for item in _parse_list_header(value): |
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379 if '=' not in item: |
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380 result[item] = None |
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381 continue |
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382 name, value = item.split('=', 1) |
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383 if value[:1] == value[-1:] == '"': |
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384 value = unquote_header_value(value[1:-1]) |
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385 result[name] = value |
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386 return result |
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387 |
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388 |
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389 # From mitsuhiko/werkzeug (used with permission). |
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390 def unquote_header_value(value, is_filename=False): |
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391 r"""Unquotes a header value. (Reversal of :func:`quote_header_value`). |
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392 This does not use the real unquoting but what browsers are actually |
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393 using for quoting. |
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394 |
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395 :param value: the header value to unquote. |
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396 :rtype: str |
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397 """ |
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398 if value and value[0] == value[-1] == '"': |
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399 # this is not the real unquoting, but fixing this so that the |
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400 # RFC is met will result in bugs with internet explorer and |
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401 # probably some other browsers as well. IE for example is |
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402 # uploading files with "C:\foo\bar.txt" as filename |
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403 value = value[1:-1] |
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404 |
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405 # if this is a filename and the starting characters look like |
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406 # a UNC path, then just return the value without quotes. Using the |
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407 # replace sequence below on a UNC path has the effect of turning |
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408 # the leading double slash into a single slash and then |
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409 # _fix_ie_filename() doesn't work correctly. See #458. |
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410 if not is_filename or value[:2] != '\\\\': |
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411 return value.replace('\\\\', '\\').replace('\\"', '"') |
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412 return value |
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413 |
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414 |
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415 def dict_from_cookiejar(cj): |
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416 """Returns a key/value dictionary from a CookieJar. |
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417 |
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418 :param cj: CookieJar object to extract cookies from. |
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419 :rtype: dict |
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420 """ |
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421 |
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422 cookie_dict = {} |
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423 |
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424 for cookie in cj: |
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425 cookie_dict[cookie.name] = cookie.value |
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426 |
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427 return cookie_dict |
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428 |
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429 |
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430 def add_dict_to_cookiejar(cj, cookie_dict): |
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431 """Returns a CookieJar from a key/value dictionary. |
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432 |
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433 :param cj: CookieJar to insert cookies into. |
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434 :param cookie_dict: Dict of key/values to insert into CookieJar. |
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435 :rtype: CookieJar |
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436 """ |
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437 |
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438 return cookiejar_from_dict(cookie_dict, cj) |
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439 |
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440 |
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441 def get_encodings_from_content(content): |
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442 """Returns encodings from given content string. |
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443 |
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444 :param content: bytestring to extract encodings from. |
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445 """ |
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446 warnings.warn(( |
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447 'In requests 3.0, get_encodings_from_content will be removed. For ' |
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448 'more information, please see the discussion on issue #2266. (This' |
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449 ' warning should only appear once.)'), |
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450 DeprecationWarning) |
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451 |
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452 charset_re = re.compile(r'<meta.*?charset=["\']*(.+?)["\'>]', flags=re.I) |
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453 pragma_re = re.compile(r'<meta.*?content=["\']*;?charset=(.+?)["\'>]', flags=re.I) |
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454 xml_re = re.compile(r'^<\?xml.*?encoding=["\']*(.+?)["\'>]') |
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455 |
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456 return (charset_re.findall(content) + |
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457 pragma_re.findall(content) + |
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458 xml_re.findall(content)) |
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parents:
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459 |
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parents:
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changeset
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460 |
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parents:
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461 def _parse_content_type_header(header): |
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462 """Returns content type and parameters from given header |
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parents:
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463 |
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parents:
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464 :param header: string |
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465 :return: tuple containing content type and dictionary of |
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466 parameters |
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467 """ |
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468 |
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469 tokens = header.split(';') |
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470 content_type, params = tokens[0].strip(), tokens[1:] |
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471 params_dict = {} |
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472 items_to_strip = "\"' " |
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473 |
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474 for param in params: |
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475 param = param.strip() |
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476 if param: |
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477 key, value = param, True |
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478 index_of_equals = param.find("=") |
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479 if index_of_equals != -1: |
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480 key = param[:index_of_equals].strip(items_to_strip) |
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481 value = param[index_of_equals + 1:].strip(items_to_strip) |
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482 params_dict[key.lower()] = value |
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483 return content_type, params_dict |
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484 |
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485 |
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486 def get_encoding_from_headers(headers): |
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487 """Returns encodings from given HTTP Header Dict. |
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488 |
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489 :param headers: dictionary to extract encoding from. |
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490 :rtype: str |
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491 """ |
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492 |
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493 content_type = headers.get('content-type') |
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494 |
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495 if not content_type: |
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496 return None |
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parents:
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497 |
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498 content_type, params = _parse_content_type_header(content_type) |
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parents:
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changeset
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499 |
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parents:
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500 if 'charset' in params: |
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501 return params['charset'].strip("'\"") |
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parents:
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changeset
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502 |
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parents:
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503 if 'text' in content_type: |
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504 return 'ISO-8859-1' |
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parents:
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505 |
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506 if 'application/json' in content_type: |
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507 # Assume UTF-8 based on RFC 4627: https://www.ietf.org/rfc/rfc4627.txt since the charset was unset |
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508 return 'utf-8' |
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parents:
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changeset
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509 |
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parents:
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changeset
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510 |
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parents:
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511 def stream_decode_response_unicode(iterator, r): |
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512 """Stream decodes a iterator.""" |
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513 |
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514 if r.encoding is None: |
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515 for item in iterator: |
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516 yield item |
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517 return |
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parents:
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changeset
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518 |
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519 decoder = codecs.getincrementaldecoder(r.encoding)(errors='replace') |
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520 for chunk in iterator: |
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521 rv = decoder.decode(chunk) |
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522 if rv: |
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523 yield rv |
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524 rv = decoder.decode(b'', final=True) |
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|
525 if rv: |
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parents:
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526 yield rv |
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parents:
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changeset
|
527 |
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shellac
parents:
diff
changeset
|
528 |
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parents:
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529 def iter_slices(string, slice_length): |
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parents:
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530 """Iterate over slices of a string.""" |
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|
531 pos = 0 |
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532 if slice_length is None or slice_length <= 0: |
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parents:
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533 slice_length = len(string) |
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parents:
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534 while pos < len(string): |
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parents:
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|
535 yield string[pos:pos + slice_length] |
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parents:
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536 pos += slice_length |
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shellac
parents:
diff
changeset
|
537 |
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shellac
parents:
diff
changeset
|
538 |
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shellac
parents:
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changeset
|
539 def get_unicode_from_response(r): |
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parents:
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changeset
|
540 """Returns the requested content back in unicode. |
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parents:
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changeset
|
541 |
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parents:
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|
542 :param r: Response object to get unicode content from. |
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shellac
parents:
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changeset
|
543 |
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shellac
parents:
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changeset
|
544 Tried: |
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shellac
parents:
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changeset
|
545 |
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parents:
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|
546 1. charset from content-type |
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parents:
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547 2. fall back and replace all unicode characters |
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parents:
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changeset
|
548 |
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shellac
parents:
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changeset
|
549 :rtype: str |
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parents:
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550 """ |
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parents:
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551 warnings.warn(( |
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parents:
diff
changeset
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552 'In requests 3.0, get_unicode_from_response will be removed. For ' |
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shellac
parents:
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|
553 'more information, please see the discussion on issue #2266. (This' |
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shellac
parents:
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|
554 ' warning should only appear once.)'), |
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parents:
diff
changeset
|
555 DeprecationWarning) |
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shellac
parents:
diff
changeset
|
556 |
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"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
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parents:
diff
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|
557 tried_encodings = [] |
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shellac
parents:
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|
558 |
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shellac
parents:
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changeset
|
559 # Try charset from content-type |
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shellac
parents:
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|
560 encoding = get_encoding_from_headers(r.headers) |
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shellac
parents:
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changeset
|
561 |
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"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
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changeset
|
562 if encoding: |
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parents:
diff
changeset
|
563 try: |
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parents:
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564 return str(r.content, encoding) |
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shellac
parents:
diff
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|
565 except UnicodeError: |
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parents:
diff
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|
566 tried_encodings.append(encoding) |
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shellac
parents:
diff
changeset
|
567 |
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"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
568 # Fall back: |
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parents:
diff
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|
569 try: |
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parents:
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|
570 return str(r.content, encoding, errors='replace') |
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parents:
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changeset
|
571 except TypeError: |
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parents:
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changeset
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572 return r.content |
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parents:
diff
changeset
|
573 |
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parents:
diff
changeset
|
574 |
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shellac
parents:
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changeset
|
575 # The unreserved URI characters (RFC 3986) |
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parents:
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576 UNRESERVED_SET = frozenset( |
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parents:
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577 "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz" + "0123456789-._~") |
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parents:
diff
changeset
|
578 |
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parents:
diff
changeset
|
579 |
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parents:
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|
580 def unquote_unreserved(uri): |
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parents:
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581 """Un-escape any percent-escape sequences in a URI that are unreserved |
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parents:
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|
582 characters. This leaves all reserved, illegal and non-ASCII bytes encoded. |
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parents:
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changeset
|
583 |
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parents:
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584 :rtype: str |
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parents:
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585 """ |
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parents:
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586 parts = uri.split('%') |
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parents:
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changeset
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587 for i in range(1, len(parts)): |
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588 h = parts[i][0:2] |
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589 if len(h) == 2 and h.isalnum(): |
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parents:
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590 try: |
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parents:
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591 c = chr(int(h, 16)) |
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parents:
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592 except ValueError: |
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parents:
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593 raise InvalidURL("Invalid percent-escape sequence: '%s'" % h) |
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parents:
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changeset
|
594 |
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"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
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parents:
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changeset
|
595 if c in UNRESERVED_SET: |
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parents:
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596 parts[i] = c + parts[i][2:] |
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parents:
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597 else: |
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parents:
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598 parts[i] = '%' + parts[i] |
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parents:
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599 else: |
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600 parts[i] = '%' + parts[i] |
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601 return ''.join(parts) |
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parents:
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changeset
|
602 |
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parents:
diff
changeset
|
603 |
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parents:
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changeset
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604 def requote_uri(uri): |
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parents:
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605 """Re-quote the given URI. |
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parents:
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changeset
|
606 |
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shellac
parents:
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changeset
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607 This function passes the given URI through an unquote/quote cycle to |
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"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
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parents:
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changeset
|
608 ensure that it is fully and consistently quoted. |
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parents:
diff
changeset
|
609 |
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parents:
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changeset
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610 :rtype: str |
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parents:
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changeset
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611 """ |
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parents:
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changeset
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612 safe_with_percent = "!#$%&'()*+,/:;=?@[]~" |
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parents:
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613 safe_without_percent = "!#$&'()*+,/:;=?@[]~" |
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parents:
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changeset
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614 try: |
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parents:
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changeset
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615 # Unquote only the unreserved characters |
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parents:
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changeset
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616 # Then quote only illegal characters (do not quote reserved, |
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parents:
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changeset
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617 # unreserved, or '%') |
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parents:
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618 return quote(unquote_unreserved(uri), safe=safe_with_percent) |
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"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
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parents:
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changeset
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619 except InvalidURL: |
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parents:
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changeset
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620 # We couldn't unquote the given URI, so let's try quoting it, but |
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"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
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parents:
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changeset
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621 # there may be unquoted '%'s in the URI. We need to make sure they're |
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parents:
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changeset
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622 # properly quoted so they do not cause issues elsewhere. |
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parents:
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623 return quote(uri, safe=safe_without_percent) |
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shellac
parents:
diff
changeset
|
624 |
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shellac
parents:
diff
changeset
|
625 |
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shellac
parents:
diff
changeset
|
626 def address_in_network(ip, net): |
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parents:
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changeset
|
627 """This function allows you to check if an IP belongs to a network subnet |
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shellac
parents:
diff
changeset
|
628 |
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"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
629 Example: returns True if ip = 192.168.1.1 and net = 192.168.1.0/24 |
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"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
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changeset
|
630 returns False if ip = 192.168.1.1 and net = 192.168.100.0/24 |
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"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
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changeset
|
631 |
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shellac
parents:
diff
changeset
|
632 :rtype: bool |
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shellac
parents:
diff
changeset
|
633 """ |
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shellac
parents:
diff
changeset
|
634 ipaddr = struct.unpack('=L', socket.inet_aton(ip))[0] |
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"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
635 netaddr, bits = net.split('/') |
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"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
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parents:
diff
changeset
|
636 netmask = struct.unpack('=L', socket.inet_aton(dotted_netmask(int(bits))))[0] |
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"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
637 network = struct.unpack('=L', socket.inet_aton(netaddr))[0] & netmask |
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"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
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changeset
|
638 return (ipaddr & netmask) == (network & netmask) |
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"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
639 |
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"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
640 |
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"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
641 def dotted_netmask(mask): |
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"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
642 """Converts mask from /xx format to xxx.xxx.xxx.xxx |
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"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
643 |
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"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
644 Example: if mask is 24 function returns 255.255.255.0 |
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"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
645 |
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"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
646 :rtype: str |
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"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
647 """ |
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"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
648 bits = 0xffffffff ^ (1 << 32 - mask) - 1 |
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"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
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changeset
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649 return socket.inet_ntoa(struct.pack('>I', bits)) |
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"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
650 |
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"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
651 |
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"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
652 def is_ipv4_address(string_ip): |
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"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
653 """ |
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"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
654 :rtype: bool |
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"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
655 """ |
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"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
656 try: |
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"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
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changeset
|
657 socket.inet_aton(string_ip) |
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"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
658 except socket.error: |
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"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
659 return False |
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"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
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changeset
|
660 return True |
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"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
661 |
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"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
662 |
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"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
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changeset
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663 def is_valid_cidr(string_network): |
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"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
664 """ |
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"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
665 Very simple check of the cidr format in no_proxy variable. |
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"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
666 |
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"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
667 :rtype: bool |
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"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
668 """ |
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"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
669 if string_network.count('/') == 1: |
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"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
670 try: |
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"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
671 mask = int(string_network.split('/')[1]) |
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"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
672 except ValueError: |
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"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
673 return False |
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"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
674 |
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"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
675 if mask < 1 or mask > 32: |
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"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
676 return False |
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"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
677 |
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"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
678 try: |
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"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
679 socket.inet_aton(string_network.split('/')[0]) |
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"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
680 except socket.error: |
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"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
681 return False |
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"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
682 else: |
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"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
683 return False |
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"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
684 return True |
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"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
685 |
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686 |
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|
687 @contextlib.contextmanager |
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688 def set_environ(env_name, value): |
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689 """Set the environment variable 'env_name' to 'value' |
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|
690 |
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691 Save previous value, yield, and then restore the previous value stored in |
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|
692 the environment variable 'env_name'. |
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|
693 |
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|
694 If 'value' is None, do nothing""" |
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695 value_changed = value is not None |
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696 if value_changed: |
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697 old_value = os.environ.get(env_name) |
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698 os.environ[env_name] = value |
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|
699 try: |
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700 yield |
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|
701 finally: |
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702 if value_changed: |
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703 if old_value is None: |
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|
704 del os.environ[env_name] |
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705 else: |
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706 os.environ[env_name] = old_value |
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|
707 |
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|
708 |
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|
709 def should_bypass_proxies(url, no_proxy): |
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710 """ |
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|
711 Returns whether we should bypass proxies or not. |
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712 |
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parents:
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713 :rtype: bool |
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714 """ |
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715 # Prioritize lowercase environment variables over uppercase |
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716 # to keep a consistent behaviour with other http projects (curl, wget). |
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717 get_proxy = lambda k: os.environ.get(k) or os.environ.get(k.upper()) |
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718 |
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719 # First check whether no_proxy is defined. If it is, check that the URL |
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"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
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720 # we're getting isn't in the no_proxy list. |
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721 no_proxy_arg = no_proxy |
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722 if no_proxy is None: |
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723 no_proxy = get_proxy('no_proxy') |
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724 parsed = urlparse(url) |
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|
725 |
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|
726 if parsed.hostname is None: |
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727 # URLs don't always have hostnames, e.g. file:/// urls. |
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"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
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|
728 return True |
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parents:
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|
729 |
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"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
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parents:
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|
730 if no_proxy: |
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|
731 # We need to check whether we match here. We need to see if we match |
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shellac
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732 # the end of the hostname, both with and without the port. |
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733 no_proxy = ( |
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parents:
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|
734 host for host in no_proxy.replace(' ', '').split(',') if host |
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|
735 ) |
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parents:
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|
736 |
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shellac
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737 if is_ipv4_address(parsed.hostname): |
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shellac
parents:
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|
738 for proxy_ip in no_proxy: |
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"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
739 if is_valid_cidr(proxy_ip): |
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shellac
parents:
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|
740 if address_in_network(parsed.hostname, proxy_ip): |
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"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
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|
741 return True |
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shellac
parents:
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742 elif parsed.hostname == proxy_ip: |
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shellac
parents:
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743 # If no_proxy ip was defined in plain IP notation instead of cidr notation & |
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|
744 # matches the IP of the index |
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|
745 return True |
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"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
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746 else: |
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parents:
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|
747 host_with_port = parsed.hostname |
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748 if parsed.port: |
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"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
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|
749 host_with_port += ':{}'.format(parsed.port) |
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"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
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changeset
|
750 |
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"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
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|
751 for host in no_proxy: |
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"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
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|
752 if parsed.hostname.endswith(host) or host_with_port.endswith(host): |
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"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
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|
753 # The URL does match something in no_proxy, so we don't want |
4f3585e2f14b
"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
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|
754 # to apply the proxies on this URL. |
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shellac
parents:
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|
755 return True |
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shellac
parents:
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|
756 |
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"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
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|
757 with set_environ('no_proxy', no_proxy_arg): |
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"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
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|
758 # parsed.hostname can be `None` in cases such as a file URI. |
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shellac
parents:
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|
759 try: |
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shellac
parents:
diff
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|
760 bypass = proxy_bypass(parsed.hostname) |
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shellac
parents:
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|
761 except (TypeError, socket.gaierror): |
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"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
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parents:
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|
762 bypass = False |
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shellac
parents:
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|
763 |
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"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
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|
764 if bypass: |
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"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
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|
765 return True |
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shellac
parents:
diff
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|
766 |
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shellac
parents:
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|
767 return False |
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shellac
parents:
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|
768 |
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"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
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|
769 |
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shellac
parents:
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|
770 def get_environ_proxies(url, no_proxy=None): |
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"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
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|
771 """ |
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"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
772 Return a dict of environment proxies. |
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shellac
parents:
diff
changeset
|
773 |
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"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
774 :rtype: dict |
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shellac
parents:
diff
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|
775 """ |
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"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
776 if should_bypass_proxies(url, no_proxy=no_proxy): |
4f3585e2f14b
"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
777 return {} |
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shellac
parents:
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|
778 else: |
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shellac
parents:
diff
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|
779 return getproxies() |
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"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
780 |
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"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
781 |
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"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
782 def select_proxy(url, proxies): |
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"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
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|
783 """Select a proxy for the url, if applicable. |
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"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
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|
784 |
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"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
785 :param url: The url being for the request |
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"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
786 :param proxies: A dictionary of schemes or schemes and hosts to proxy URLs |
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"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
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|
787 """ |
4f3585e2f14b
"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
788 proxies = proxies or {} |
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"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
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|
789 urlparts = urlparse(url) |
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"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
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|
790 if urlparts.hostname is None: |
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"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
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791 return proxies.get(urlparts.scheme, proxies.get('all')) |
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"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
792 |
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"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
793 proxy_keys = [ |
4f3585e2f14b
"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
794 urlparts.scheme + '://' + urlparts.hostname, |
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"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
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|
795 urlparts.scheme, |
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"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
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|
796 'all://' + urlparts.hostname, |
4f3585e2f14b
"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
797 'all', |
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"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
798 ] |
4f3585e2f14b
"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
799 proxy = None |
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parents:
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changeset
|
800 for proxy_key in proxy_keys: |
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"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
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|
801 if proxy_key in proxies: |
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"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
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parents:
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|
802 proxy = proxies[proxy_key] |
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"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
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parents:
diff
changeset
|
803 break |
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parents:
diff
changeset
|
804 |
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"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
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parents:
diff
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|
805 return proxy |
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parents:
diff
changeset
|
806 |
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"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
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parents:
diff
changeset
|
807 |
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"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
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parents:
diff
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|
808 def default_user_agent(name="python-requests"): |
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"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
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|
809 """ |
4f3585e2f14b
"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
810 Return a string representing the default user agent. |
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"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
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|
811 |
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"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
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parents:
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|
812 :rtype: str |
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parents:
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|
813 """ |
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parents:
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|
814 return '%s/%s' % (name, __version__) |
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"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
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parents:
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|
815 |
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"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
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parents:
diff
changeset
|
816 |
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"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
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parents:
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|
817 def default_headers(): |
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parents:
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|
818 """ |
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shellac
parents:
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|
819 :rtype: requests.structures.CaseInsensitiveDict |
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|
820 """ |
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|
821 return CaseInsensitiveDict({ |
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"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
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parents:
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|
822 'User-Agent': default_user_agent(), |
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"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
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changeset
|
823 'Accept-Encoding': ', '.join(('gzip', 'deflate')), |
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"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
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|
824 'Accept': '*/*', |
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"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
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|
825 'Connection': 'keep-alive', |
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"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
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changeset
|
826 }) |
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shellac
parents:
diff
changeset
|
827 |
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shellac
parents:
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changeset
|
828 |
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shellac
parents:
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changeset
|
829 def parse_header_links(value): |
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shellac
parents:
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|
830 """Return a list of parsed link headers proxies. |
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"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
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parents:
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|
831 |
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"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
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parents:
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changeset
|
832 i.e. Link: <http:/.../front.jpeg>; rel=front; type="image/jpeg",<http://.../back.jpeg>; rel=back;type="image/jpeg" |
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shellac
parents:
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changeset
|
833 |
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"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
changeset
|
834 :rtype: list |
4f3585e2f14b
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shellac
parents:
diff
changeset
|
835 """ |
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shellac
parents:
diff
changeset
|
836 |
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shellac
parents:
diff
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|
837 links = [] |
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shellac
parents:
diff
changeset
|
838 |
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shellac
parents:
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changeset
|
839 replace_chars = ' \'"' |
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parents:
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|
840 |
4f3585e2f14b
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shellac
parents:
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changeset
|
841 value = value.strip(replace_chars) |
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parents:
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changeset
|
842 if not value: |
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shellac
parents:
diff
changeset
|
843 return links |
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shellac
parents:
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changeset
|
844 |
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parents:
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changeset
|
845 for val in re.split(', *<', value): |
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shellac
parents:
diff
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|
846 try: |
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"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
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parents:
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|
847 url, params = val.split(';', 1) |
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shellac
parents:
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|
848 except ValueError: |
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shellac
parents:
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changeset
|
849 url, params = val, '' |
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parents:
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|
850 |
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shellac
parents:
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|
851 link = {'url': url.strip('<> \'"')} |
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parents:
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|
852 |
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parents:
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|
853 for param in params.split(';'): |
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shellac
parents:
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changeset
|
854 try: |
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shellac
parents:
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|
855 key, value = param.split('=') |
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"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
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parents:
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|
856 except ValueError: |
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parents:
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|
857 break |
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shellac
parents:
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changeset
|
858 |
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parents:
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|
859 link[key.strip(replace_chars)] = value.strip(replace_chars) |
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parents:
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|
860 |
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parents:
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|
861 links.append(link) |
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parents:
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|
862 |
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parents:
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changeset
|
863 return links |
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shellac
parents:
diff
changeset
|
864 |
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parents:
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|
865 |
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parents:
diff
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|
866 # Null bytes; no need to recreate these on each call to guess_json_utf |
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shellac
parents:
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|
867 _null = '\x00'.encode('ascii') # encoding to ASCII for Python 3 |
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868 _null2 = _null * 2 |
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869 _null3 = _null * 3 |
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parents:
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|
870 |
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shellac
parents:
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changeset
|
871 |
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shellac
parents:
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|
872 def guess_json_utf(data): |
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|
873 """ |
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shellac
parents:
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changeset
|
874 :rtype: str |
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parents:
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|
875 """ |
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shellac
parents:
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changeset
|
876 # JSON always starts with two ASCII characters, so detection is as |
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parents:
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|
877 # easy as counting the nulls and from their location and count |
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parents:
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|
878 # determine the encoding. Also detect a BOM, if present. |
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shellac
parents:
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879 sample = data[:4] |
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shellac
parents:
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|
880 if sample in (codecs.BOM_UTF32_LE, codecs.BOM_UTF32_BE): |
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parents:
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|
881 return 'utf-32' # BOM included |
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shellac
parents:
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|
882 if sample[:3] == codecs.BOM_UTF8: |
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shellac
parents:
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|
883 return 'utf-8-sig' # BOM included, MS style (discouraged) |
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"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
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|
884 if sample[:2] in (codecs.BOM_UTF16_LE, codecs.BOM_UTF16_BE): |
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parents:
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|
885 return 'utf-16' # BOM included |
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shellac
parents:
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|
886 nullcount = sample.count(_null) |
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parents:
diff
changeset
|
887 if nullcount == 0: |
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shellac
parents:
diff
changeset
|
888 return 'utf-8' |
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shellac
parents:
diff
changeset
|
889 if nullcount == 2: |
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"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
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|
890 if sample[::2] == _null2: # 1st and 3rd are null |
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"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
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|
891 return 'utf-16-be' |
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shellac
parents:
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|
892 if sample[1::2] == _null2: # 2nd and 4th are null |
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"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
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|
893 return 'utf-16-le' |
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parents:
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|
894 # Did not detect 2 valid UTF-16 ascii-range characters |
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shellac
parents:
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|
895 if nullcount == 3: |
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parents:
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|
896 if sample[:3] == _null3: |
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"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
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parents:
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|
897 return 'utf-32-be' |
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shellac
parents:
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|
898 if sample[1:] == _null3: |
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"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff
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|
899 return 'utf-32-le' |
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shellac
parents:
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changeset
|
900 # Did not detect a valid UTF-32 ascii-range character |
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shellac
parents:
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|
901 return None |
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shellac
parents:
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changeset
|
902 |
4f3585e2f14b
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shellac
parents:
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changeset
|
903 |
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parents:
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|
904 def prepend_scheme_if_needed(url, new_scheme): |
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shellac
parents:
diff
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|
905 """Given a URL that may or may not have a scheme, prepend the given scheme. |
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"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
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parents:
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906 Does not replace a present scheme with the one provided as an argument. |
4f3585e2f14b
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shellac
parents:
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|
907 |
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shellac
parents:
diff
changeset
|
908 :rtype: str |
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shellac
parents:
diff
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|
909 """ |
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shellac
parents:
diff
changeset
|
910 scheme, netloc, path, params, query, fragment = urlparse(url, new_scheme) |
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parents:
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|
911 |
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parents:
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|
912 # urlparse is a finicky beast, and sometimes decides that there isn't a |
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shellac
parents:
diff
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|
913 # netloc present. Assume that it's being over-cautious, and switch netloc |
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914 # and path if urlparse decided there was no netloc. |
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|
915 if not netloc: |
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|
916 netloc, path = path, netloc |
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|
917 |
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|
918 return urlunparse((scheme, netloc, path, params, query, fragment)) |
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|
919 |
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|
920 |
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|
921 def get_auth_from_url(url): |
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|
922 """Given a url with authentication components, extract them into a tuple of |
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|
923 username,password. |
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|
924 |
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|
925 :rtype: (str,str) |
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|
926 """ |
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|
927 parsed = urlparse(url) |
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|
928 |
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|
929 try: |
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930 auth = (unquote(parsed.username), unquote(parsed.password)) |
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931 except (AttributeError, TypeError): |
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932 auth = ('', '') |
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|
933 |
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|
934 return auth |
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935 |
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936 |
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937 # Moved outside of function to avoid recompile every call |
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938 _CLEAN_HEADER_REGEX_BYTE = re.compile(b'^\\S[^\\r\\n]*$|^$') |
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939 _CLEAN_HEADER_REGEX_STR = re.compile(r'^\S[^\r\n]*$|^$') |
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|
940 |
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|
941 |
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942 def check_header_validity(header): |
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943 """Verifies that header value is a string which doesn't contain |
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944 leading whitespace or return characters. This prevents unintended |
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|
945 header injection. |
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|
946 |
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|
947 :param header: tuple, in the format (name, value). |
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|
948 """ |
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|
949 name, value = header |
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|
950 |
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|
951 if isinstance(value, bytes): |
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|
952 pat = _CLEAN_HEADER_REGEX_BYTE |
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953 else: |
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954 pat = _CLEAN_HEADER_REGEX_STR |
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955 try: |
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|
956 if not pat.match(value): |
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|
957 raise InvalidHeader("Invalid return character or leading space in header: %s" % name) |
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958 except TypeError: |
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|
959 raise InvalidHeader("Value for header {%s: %s} must be of type str or " |
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960 "bytes, not %s" % (name, value, type(value))) |
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|
961 |
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|
962 |
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963 def urldefragauth(url): |
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|
964 """ |
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965 Given a url remove the fragment and the authentication part. |
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966 |
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967 :rtype: str |
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968 """ |
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969 scheme, netloc, path, params, query, fragment = urlparse(url) |
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|
970 |
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971 # see func:`prepend_scheme_if_needed` |
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972 if not netloc: |
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973 netloc, path = path, netloc |
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|
974 |
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975 netloc = netloc.rsplit('@', 1)[-1] |
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976 |
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|
977 return urlunparse((scheme, netloc, path, params, query, '')) |
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parents:
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|
978 |
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parents:
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|
979 |
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|
980 def rewind_body(prepared_request): |
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|
981 """Move file pointer back to its recorded starting position |
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982 so it can be read again on redirect. |
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|
983 """ |
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parents:
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|
984 body_seek = getattr(prepared_request.body, 'seek', None) |
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parents:
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|
985 if body_seek is not None and isinstance(prepared_request._body_position, integer_types): |
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parents:
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|
986 try: |
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parents:
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|
987 body_seek(prepared_request._body_position) |
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|
988 except (IOError, OSError): |
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|
989 raise UnrewindableBodyError("An error occurred when rewinding request " |
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|
990 "body for redirect.") |
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|
991 else: |
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shellac
parents:
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|
992 raise UnrewindableBodyError("Unable to rewind request body for redirect.") |