Raphaël G. Git Repositories - youtubedl/blob - youtube_dl/compat.py

   1 from __future__ import unicode_literals
   2
   3 import getpass
   4 import optparse
   5 import os
   6 import re
   7 import subprocess
   8 import sys
   9
  10
  11 try:
  12     import urllib.request as compat_urllib_request
  13 except ImportError:  # Python 2
  14     import urllib2 as compat_urllib_request
  15
  16 try:
  17     import urllib.error as compat_urllib_error
  18 except ImportError:  # Python 2
  19     import urllib2 as compat_urllib_error
  20
  21 try:
  22     import urllib.parse as compat_urllib_parse
  23 except ImportError:  # Python 2
  24     import urllib as compat_urllib_parse
  25
  26 try:
  27     from urllib.parse import urlparse as compat_urllib_parse_urlparse
  28 except ImportError:  # Python 2
  29     from urlparse import urlparse as compat_urllib_parse_urlparse
  30
  31 try:
  32     import urllib.parse as compat_urlparse
  33 except ImportError:  # Python 2
  34     import urlparse as compat_urlparse
  35
  36 try:
  37     import http.cookiejar as compat_cookiejar
  38 except ImportError:  # Python 2
  39     import cookielib as compat_cookiejar
  40
  41 try:
  42     import html.entities as compat_html_entities
  43 except ImportError:  # Python 2
  44     import htmlentitydefs as compat_html_entities
  45
  46 try:
  47     import html.parser as compat_html_parser
  48 except ImportError:  # Python 2
  49     import HTMLParser as compat_html_parser
  50
  51 try:
  52     import http.client as compat_http_client
  53 except ImportError:  # Python 2
  54     import httplib as compat_http_client
  55
  56 try:
  57     from urllib.error import HTTPError as compat_HTTPError
  58 except ImportError:  # Python 2
  59     from urllib2 import HTTPError as compat_HTTPError
  60
  61 try:
  62     from urllib.request import urlretrieve as compat_urlretrieve
  63 except ImportError:  # Python 2
  64     from urllib import urlretrieve as compat_urlretrieve
  65
  66
  67 try:
  68     from subprocess import DEVNULL
  69     compat_subprocess_get_DEVNULL = lambda: DEVNULL
  70 except ImportError:
  71     compat_subprocess_get_DEVNULL = lambda: open(os.path.devnull, 'w')
  72
  73 try:
  74     from urllib.parse import unquote as compat_urllib_parse_unquote
  75 except ImportError:
  76     def compat_urllib_parse_unquote(string, encoding='utf-8', errors='replace'):
  77         if string == '':
  78             return string
  79         res = string.split('%')
  80         if len(res) == 1:
  81             return string
  82         if encoding is None:
  83             encoding = 'utf-8'
  84         if errors is None:
  85             errors = 'replace'
  86         # pct_sequence: contiguous sequence of percent-encoded bytes, decoded
  87         pct_sequence = b''
  88         string = res[0]
  89         for item in res[1:]:
  90             try:
  91                 if not item:
  92                     raise ValueError
  93                 pct_sequence += item[:2].decode('hex')
  94                 rest = item[2:]
  95                 if not rest:
  96                     # This segment was just a single percent-encoded character.
  97                     # May be part of a sequence of code units, so delay decoding.
  98                     # (Stored in pct_sequence).
  99                     continue
 100             except ValueError:
 101                 rest = '%' + item
 102             # Encountered non-percent-encoded characters. Flush the current
 103             # pct_sequence.
 104             string += pct_sequence.decode(encoding, errors) + rest
 105             pct_sequence = b''
 106         if pct_sequence:
 107             # Flush the final pct_sequence
 108             string += pct_sequence.decode(encoding, errors)
 109         return string
 110
 111
 112 try:
 113     from urllib.parse import parse_qs as compat_parse_qs
 114 except ImportError:  # Python 2
 115     # HACK: The following is the correct parse_qs implementation from cpython 3's stdlib.
 116     # Python 2's version is apparently totally broken
 117
 118     def _parse_qsl(qs, keep_blank_values=False, strict_parsing=False,
 119                    encoding='utf-8', errors='replace'):
 120         qs, _coerce_result = qs, unicode
 121         pairs = [s2 for s1 in qs.split('&') for s2 in s1.split(';')]
 122         r = []
 123         for name_value in pairs:
 124             if not name_value and not strict_parsing:
 125                 continue
 126             nv = name_value.split('=', 1)
 127             if len(nv) != 2:
 128                 if strict_parsing:
 129                     raise ValueError("bad query field: %r" % (name_value,))
 130                 # Handle case of a control-name with no equal sign
 131                 if keep_blank_values:
 132                     nv.append('')
 133                 else:
 134                     continue
 135             if len(nv[1]) or keep_blank_values:
 136                 name = nv[0].replace('+', ' ')
 137                 name = compat_urllib_parse_unquote(
 138                     name, encoding=encoding, errors=errors)
 139                 name = _coerce_result(name)
 140                 value = nv[1].replace('+', ' ')
 141                 value = compat_urllib_parse_unquote(
 142                     value, encoding=encoding, errors=errors)
 143                 value = _coerce_result(value)
 144                 r.append((name, value))
 145         return r
 146
 147     def compat_parse_qs(qs, keep_blank_values=False, strict_parsing=False,
 148                         encoding='utf-8', errors='replace'):
 149         parsed_result = {}
 150         pairs = _parse_qsl(qs, keep_blank_values, strict_parsing,
 151                            encoding=encoding, errors=errors)
 152         for name, value in pairs:
 153             if name in parsed_result:
 154                 parsed_result[name].append(value)
 155             else:
 156                 parsed_result[name] = [value]
 157         return parsed_result
 158
 159 try:
 160     compat_str = unicode  # Python 2
 161 except NameError:
 162     compat_str = str
 163
 164 try:
 165     compat_chr = unichr  # Python 2
 166 except NameError:
 167     compat_chr = chr
 168
 169 try:
 170     from xml.etree.ElementTree import ParseError as compat_xml_parse_error
 171 except ImportError:  # Python 2.6
 172     from xml.parsers.expat import ExpatError as compat_xml_parse_error
 173
 174 try:
 175     from shlex import quote as shlex_quote
 176 except ImportError:  # Python < 3.3
 177     def shlex_quote(s):
 178         if re.match(r'^[-_\w./]+$', s):
 179             return s
 180         else:
 181             return "'" + s.replace("'", "'\"'\"'") + "'"
 182
 183
 184 def compat_ord(c):
 185     if type(c) is int:
 186         return c
 187     else:
 188         return ord(c)
 189
 190
 191 if sys.version_info >= (3, 0):
 192     compat_getenv = os.getenv
 193     compat_expanduser = os.path.expanduser
 194 else:
 195     # Environment variables should be decoded with filesystem encoding.
 196     # Otherwise it will fail if any non-ASCII characters present (see #3854 #3217 #2918)
 197
 198     def compat_getenv(key, default=None):
 199         from .utils import get_filesystem_encoding
 200         env = os.getenv(key, default)
 201         if env:
 202             env = env.decode(get_filesystem_encoding())
 203         return env
 204
 205     # HACK: The default implementations of os.path.expanduser from cpython do not decode
 206     # environment variables with filesystem encoding. We will work around this by
 207     # providing adjusted implementations.
 208     # The following are os.path.expanduser implementations from cpython 2.7.8 stdlib
 209     # for different platforms with correct environment variables decoding.
 210
 211     if os.name == 'posix':
 212         def compat_expanduser(path):
 213             """Expand ~ and ~user constructions.  If user or $HOME is unknown,
 214             do nothing."""
 215             if not path.startswith('~'):
 216                 return path
 217             i = path.find('/', 1)
 218             if i < 0:
 219                 i = len(path)
 220             if i == 1:
 221                 if 'HOME' not in os.environ:
 222                     import pwd
 223                     userhome = pwd.getpwuid(os.getuid()).pw_dir
 224                 else:
 225                     userhome = compat_getenv('HOME')
 226             else:
 227                 import pwd
 228                 try:
 229                     pwent = pwd.getpwnam(path[1:i])
 230                 except KeyError:
 231                     return path
 232                 userhome = pwent.pw_dir
 233             userhome = userhome.rstrip('/')
 234             return (userhome + path[i:]) or '/'
 235     elif os.name == 'nt' or os.name == 'ce':
 236         def compat_expanduser(path):
 237             """Expand ~ and ~user constructs.
 238
 239             If user or $HOME is unknown, do nothing."""
 240             if path[:1] != '~':
 241                 return path
 242             i, n = 1, len(path)
 243             while i < n and path[i] not in '/\\':
 244                 i = i + 1
 245
 246             if 'HOME' in os.environ:
 247                 userhome = compat_getenv('HOME')
 248             elif 'USERPROFILE' in os.environ:
 249                 userhome = compat_getenv('USERPROFILE')
 250             elif not 'HOMEPATH' in os.environ:
 251                 return path
 252             else:
 253                 try:
 254                     drive = compat_getenv('HOMEDRIVE')
 255                 except KeyError:
 256                     drive = ''
 257                 userhome = os.path.join(drive, compat_getenv('HOMEPATH'))
 258
 259             if i != 1:  # ~user
 260                 userhome = os.path.join(os.path.dirname(userhome), path[1:i])
 261
 262             return userhome + path[i:]
 263     else:
 264         compat_expanduser = os.path.expanduser
 265
 266
 267 if sys.version_info < (3, 0):
 268     def compat_print(s):
 269         from .utils import preferredencoding
 270         print(s.encode(preferredencoding(), 'xmlcharrefreplace'))
 271 else:
 272     def compat_print(s):
 273         assert isinstance(s, compat_str)
 274         print(s)
 275
 276
 277 try:
 278     subprocess_check_output = subprocess.check_output
 279 except AttributeError:
 280     def subprocess_check_output(*args, **kwargs):
 281         assert 'input' not in kwargs
 282         p = subprocess.Popen(*args, stdout=subprocess.PIPE, **kwargs)
 283         output, _ = p.communicate()
 284         ret = p.poll()
 285         if ret:
 286             raise subprocess.CalledProcessError(ret, p.args, output=output)
 287         return output
 288
 289 if sys.version_info < (3, 0) and sys.platform == 'win32':
 290     def compat_getpass(prompt, *args, **kwargs):
 291         if isinstance(prompt, compat_str):
 292             from .utils import preferredencoding
 293             prompt = prompt.encode(preferredencoding())
 294         return getpass.getpass(prompt, *args, **kwargs)
 295 else:
 296     compat_getpass = getpass.getpass
 297
 298 # Old 2.6 and 2.7 releases require kwargs to be bytes
 299 try:
 300     (lambda x: x)(**{'x': 0})
 301 except TypeError:
 302     def compat_kwargs(kwargs):
 303         return dict((bytes(k), v) for k, v in kwargs.items())
 304 else:
 305     compat_kwargs = lambda kwargs: kwargs
 306
 307
 308 # Fix https://github.com/rg3/youtube-dl/issues/4223
 309 # See http://bugs.python.org/issue9161 for what is broken
 310 def workaround_optparse_bug9161():
 311     op = optparse.OptionParser()
 312     og = optparse.OptionGroup(op, 'foo')
 313     try:
 314         og.add_option('-t')
 315     except TypeError:
 316         real_add_option = optparse.OptionGroup.add_option
 317
 318         def _compat_add_option(self, *args, **kwargs):
 319             enc = lambda v: (
 320                 v.encode('ascii', 'replace') if isinstance(v, compat_str)
 321                 else v)
 322             bargs = [enc(a) for a in args]
 323             bkwargs = dict(
 324                 (k, enc(v)) for k, v in kwargs.items())
 325             return real_add_option(self, *bargs, **bkwargs)
 326         optparse.OptionGroup.add_option = _compat_add_option
 327
 328
 329 __all__ = [
 330     'compat_HTTPError',
 331     'compat_chr',
 332     'compat_cookiejar',
 333     'compat_expanduser',
 334     'compat_getenv',
 335     'compat_getpass',
 336     'compat_html_entities',
 337     'compat_html_parser',
 338     'compat_http_client',
 339     'compat_kwargs',
 340     'compat_ord',
 341     'compat_parse_qs',
 342     'compat_print',
 343     'compat_str',
 344     'compat_subprocess_get_DEVNULL',
 345     'compat_urllib_error',
 346     'compat_urllib_parse',
 347     'compat_urllib_parse_unquote',
 348     'compat_urllib_parse_urlparse',
 349     'compat_urllib_request',
 350     'compat_urlparse',
 351     'compat_urlretrieve',
 352     'compat_xml_parse_error',
 353     'shlex_quote',
 354     'subprocess_check_output',
 355     'workaround_optparse_bug9161',
 356 ]