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