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 socket
   8 import subprocess
   9 import sys
  10
  11
  12 try:
  13     import urllib.request as compat_urllib_request
  14 except ImportError:  # Python 2
  15     import urllib2 as compat_urllib_request
  16
  17 try:
  18     import urllib.error as compat_urllib_error
  19 except ImportError:  # Python 2
  20     import urllib2 as compat_urllib_error
  21
  22 try:
  23     import urllib.parse as compat_urllib_parse
  24 except ImportError:  # Python 2
  25     import urllib as compat_urllib_parse
  26
  27 try:
  28     from urllib.parse import urlparse as compat_urllib_parse_urlparse
  29 except ImportError:  # Python 2
  30     from urlparse import urlparse as compat_urllib_parse_urlparse
  31
  32 try:
  33     import urllib.parse as compat_urlparse
  34 except ImportError:  # Python 2
  35     import urlparse as compat_urlparse
  36
  37 try:
  38     import http.cookiejar as compat_cookiejar
  39 except ImportError:  # Python 2
  40     import cookielib as compat_cookiejar
  41
  42 try:
  43     import html.entities as compat_html_entities
  44 except ImportError:  # Python 2
  45     import htmlentitydefs as compat_html_entities
  46
  47 try:
  48     import html.parser as compat_html_parser
  49 except ImportError:  # Python 2
  50     import HTMLParser as compat_html_parser
  51
  52 try:
  53     import http.client as compat_http_client
  54 except ImportError:  # Python 2
  55     import httplib as compat_http_client
  56
  57 try:
  58     from urllib.error import HTTPError as compat_HTTPError
  59 except ImportError:  # Python 2
  60     from urllib2 import HTTPError as compat_HTTPError
  61
  62 try:
  63     from urllib.request import urlretrieve as compat_urlretrieve
  64 except ImportError:  # Python 2
  65     from urllib import urlretrieve as compat_urlretrieve
  66
  67
  68 try:
  69     from subprocess import DEVNULL
  70     compat_subprocess_get_DEVNULL = lambda: DEVNULL
  71 except ImportError:
  72     compat_subprocess_get_DEVNULL = lambda: open(os.path.devnull, 'w')
  73
  74 try:
  75     from urllib.parse import unquote as compat_urllib_parse_unquote
  76 except ImportError:
  77     def compat_urllib_parse_unquote(string, encoding='utf-8', errors='replace'):
  78         if string == '':
  79             return string
  80         res = string.split('%')
  81         if len(res) == 1:
  82             return string
  83         if encoding is None:
  84             encoding = 'utf-8'
  85         if errors is None:
  86             errors = 'replace'
  87         # pct_sequence: contiguous sequence of percent-encoded bytes, decoded
  88         pct_sequence = b''
  89         string = res[0]
  90         for item in res[1:]:
  91             try:
  92                 if not item:
  93                     raise ValueError
  94                 pct_sequence += item[:2].decode('hex')
  95                 rest = item[2:]
  96                 if not rest:
  97                     # This segment was just a single percent-encoded character.
  98                     # May be part of a sequence of code units, so delay decoding.
  99                     # (Stored in pct_sequence).
 100                     continue
 101             except ValueError:
 102                 rest = '%' + item
 103             # Encountered non-percent-encoded characters. Flush the current
 104             # pct_sequence.
 105             string += pct_sequence.decode(encoding, errors) + rest
 106             pct_sequence = b''
 107         if pct_sequence:
 108             # Flush the final pct_sequence
 109             string += pct_sequence.decode(encoding, errors)
 110         return string
 111
 112
 113 try:
 114     from urllib.parse import parse_qs as compat_parse_qs
 115 except ImportError:  # Python 2
 116     # HACK: The following is the correct parse_qs implementation from cpython 3's stdlib.
 117     # Python 2's version is apparently totally broken
 118
 119     def _parse_qsl(qs, keep_blank_values=False, strict_parsing=False,
 120                    encoding='utf-8', errors='replace'):
 121         qs, _coerce_result = qs, unicode
 122         pairs = [s2 for s1 in qs.split('&') for s2 in s1.split(';')]
 123         r = []
 124         for name_value in pairs:
 125             if not name_value and not strict_parsing:
 126                 continue
 127             nv = name_value.split('=', 1)
 128             if len(nv) != 2:
 129                 if strict_parsing:
 130                     raise ValueError("bad query field: %r" % (name_value,))
 131                 # Handle case of a control-name with no equal sign
 132                 if keep_blank_values:
 133                     nv.append('')
 134                 else:
 135                     continue
 136             if len(nv[1]) or keep_blank_values:
 137                 name = nv[0].replace('+', ' ')
 138                 name = compat_urllib_parse_unquote(
 139                     name, encoding=encoding, errors=errors)
 140                 name = _coerce_result(name)
 141                 value = nv[1].replace('+', ' ')
 142                 value = compat_urllib_parse_unquote(
 143                     value, encoding=encoding, errors=errors)
 144                 value = _coerce_result(value)
 145                 r.append((name, value))
 146         return r
 147
 148     def compat_parse_qs(qs, keep_blank_values=False, strict_parsing=False,
 149                         encoding='utf-8', errors='replace'):
 150         parsed_result = {}
 151         pairs = _parse_qsl(qs, keep_blank_values, strict_parsing,
 152                            encoding=encoding, errors=errors)
 153         for name, value in pairs:
 154             if name in parsed_result:
 155                 parsed_result[name].append(value)
 156             else:
 157                 parsed_result[name] = [value]
 158         return parsed_result
 159
 160 try:
 161     compat_str = unicode  # Python 2
 162 except NameError:
 163     compat_str = str
 164
 165 try:
 166     compat_chr = unichr  # Python 2
 167 except NameError:
 168     compat_chr = chr
 169
 170 try:
 171     from xml.etree.ElementTree import ParseError as compat_xml_parse_error
 172 except ImportError:  # Python 2.6
 173     from xml.parsers.expat import ExpatError as compat_xml_parse_error
 174
 175 try:
 176     from shlex import quote as shlex_quote
 177 except ImportError:  # Python < 3.3
 178     def shlex_quote(s):
 179         if re.match(r'^[-_\w./]+$', s):
 180             return s
 181         else:
 182             return "'" + s.replace("'", "'\"'\"'") + "'"
 183
 184
 185 def compat_ord(c):
 186     if type(c) is int:
 187         return c
 188     else:
 189         return ord(c)
 190
 191
 192 if sys.version_info >= (3, 0):
 193     compat_getenv = os.getenv
 194     compat_expanduser = os.path.expanduser
 195 else:
 196     # Environment variables should be decoded with filesystem encoding.
 197     # Otherwise it will fail if any non-ASCII characters present (see #3854 #3217 #2918)
 198
 199     def compat_getenv(key, default=None):
 200         from .utils import get_filesystem_encoding
 201         env = os.getenv(key, default)
 202         if env:
 203             env = env.decode(get_filesystem_encoding())
 204         return env
 205
 206     # HACK: The default implementations of os.path.expanduser from cpython do not decode
 207     # environment variables with filesystem encoding. We will work around this by
 208     # providing adjusted implementations.
 209     # The following are os.path.expanduser implementations from cpython 2.7.8 stdlib
 210     # for different platforms with correct environment variables decoding.
 211
 212     if os.name == 'posix':
 213         def compat_expanduser(path):
 214             """Expand ~ and ~user constructions.  If user or $HOME is unknown,
 215             do nothing."""
 216             if not path.startswith('~'):
 217                 return path
 218             i = path.find('/', 1)
 219             if i < 0:
 220                 i = len(path)
 221             if i == 1:
 222                 if 'HOME' not in os.environ:
 223                     import pwd
 224                     userhome = pwd.getpwuid(os.getuid()).pw_dir
 225                 else:
 226                     userhome = compat_getenv('HOME')
 227             else:
 228                 import pwd
 229                 try:
 230                     pwent = pwd.getpwnam(path[1:i])
 231                 except KeyError:
 232                     return path
 233                 userhome = pwent.pw_dir
 234             userhome = userhome.rstrip('/')
 235             return (userhome + path[i:]) or '/'
 236     elif os.name == 'nt' or os.name == 'ce':
 237         def compat_expanduser(path):
 238             """Expand ~ and ~user constructs.
 239
 240             If user or $HOME is unknown, do nothing."""
 241             if path[:1] != '~':
 242                 return path
 243             i, n = 1, len(path)
 244             while i < n and path[i] not in '/\\':
 245                 i = i + 1
 246
 247             if 'HOME' in os.environ:
 248                 userhome = compat_getenv('HOME')
 249             elif 'USERPROFILE' in os.environ:
 250                 userhome = compat_getenv('USERPROFILE')
 251             elif 'HOMEPATH' not in os.environ:
 252                 return path
 253             else:
 254                 try:
 255                     drive = compat_getenv('HOMEDRIVE')
 256                 except KeyError:
 257                     drive = ''
 258                 userhome = os.path.join(drive, compat_getenv('HOMEPATH'))
 259
 260             if i != 1:  # ~user
 261                 userhome = os.path.join(os.path.dirname(userhome), path[1:i])
 262
 263             return userhome + path[i:]
 264     else:
 265         compat_expanduser = os.path.expanduser
 266
 267
 268 if sys.version_info < (3, 0):
 269     def compat_print(s):
 270         from .utils import preferredencoding
 271         print(s.encode(preferredencoding(), 'xmlcharrefreplace'))
 272 else:
 273     def compat_print(s):
 274         assert isinstance(s, compat_str)
 275         print(s)
 276
 277
 278 try:
 279     subprocess_check_output = subprocess.check_output
 280 except AttributeError:
 281     def subprocess_check_output(*args, **kwargs):
 282         assert 'input' not in kwargs
 283         p = subprocess.Popen(*args, stdout=subprocess.PIPE, **kwargs)
 284         output, _ = p.communicate()
 285         ret = p.poll()
 286         if ret:
 287             raise subprocess.CalledProcessError(ret, p.args, output=output)
 288         return output
 289
 290 if sys.version_info < (3, 0) and sys.platform == 'win32':
 291     def compat_getpass(prompt, *args, **kwargs):
 292         if isinstance(prompt, compat_str):
 293             from .utils import preferredencoding
 294             prompt = prompt.encode(preferredencoding())
 295         return getpass.getpass(prompt, *args, **kwargs)
 296 else:
 297     compat_getpass = getpass.getpass
 298
 299 # Old 2.6 and 2.7 releases require kwargs to be bytes
 300 try:
 301     def _testfunc(x):
 302         pass
 303     _testfunc(**{'x': 0})
 304 except TypeError:
 305     def compat_kwargs(kwargs):
 306         return dict((bytes(k), v) for k, v in kwargs.items())
 307 else:
 308     compat_kwargs = lambda kwargs: kwargs
 309
 310
 311 if sys.version_info < (2, 7):
 312     def compat_socket_create_connection(address, timeout, source_address=None):
 313         host, port = address
 314         err = None
 315         for res in socket.getaddrinfo(host, port, 0, socket.SOCK_STREAM):
 316             af, socktype, proto, canonname, sa = res
 317             sock = None
 318             try:
 319                 sock = socket.socket(af, socktype, proto)
 320                 sock.settimeout(timeout)
 321                 if source_address:
 322                     sock.bind(source_address)
 323                 sock.connect(sa)
 324                 return sock
 325             except socket.error as _:
 326                 err = _
 327                 if sock is not None:
 328                     sock.close()
 329         if err is not None:
 330             raise err
 331         else:
 332             raise socket.error("getaddrinfo returns an empty list")
 333 else:
 334     compat_socket_create_connection = socket.create_connection
 335
 336
 337 # Fix https://github.com/rg3/youtube-dl/issues/4223
 338 # See http://bugs.python.org/issue9161 for what is broken
 339 def workaround_optparse_bug9161():
 340     op = optparse.OptionParser()
 341     og = optparse.OptionGroup(op, 'foo')
 342     try:
 343         og.add_option('-t')
 344     except TypeError:
 345         real_add_option = optparse.OptionGroup.add_option
 346
 347         def _compat_add_option(self, *args, **kwargs):
 348             enc = lambda v: (
 349                 v.encode('ascii', 'replace') if isinstance(v, compat_str)
 350                 else v)
 351             bargs = [enc(a) for a in args]
 352             bkwargs = dict(
 353                 (k, enc(v)) for k, v in kwargs.items())
 354             return real_add_option(self, *bargs, **bkwargs)
 355         optparse.OptionGroup.add_option = _compat_add_option
 356
 357
 358 __all__ = [
 359     'compat_HTTPError',
 360     'compat_chr',
 361     'compat_cookiejar',
 362     'compat_expanduser',
 363     'compat_getenv',
 364     'compat_getpass',
 365     'compat_html_entities',
 366     'compat_html_parser',
 367     'compat_http_client',
 368     'compat_kwargs',
 369     'compat_ord',
 370     'compat_parse_qs',
 371     'compat_print',
 372     'compat_socket_create_connection',
 373     'compat_str',
 374     'compat_subprocess_get_DEVNULL',
 375     'compat_urllib_error',
 376     'compat_urllib_parse',
 377     'compat_urllib_parse_unquote',
 378     'compat_urllib_parse_urlparse',
 379     'compat_urllib_request',
 380     'compat_urlparse',
 381     'compat_urlretrieve',
 382     'compat_xml_parse_error',
 383     'shlex_quote',
 384     'subprocess_check_output',
 385     'workaround_optparse_bug9161',
 386 ]