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     import http.server as compat_http_server
  76 except ImportError:
  77     import BaseHTTPServer as compat_http_server
  78
  79 try:
  80     from urllib.parse import unquote as compat_urllib_parse_unquote
  81 except ImportError:
  82     def compat_urllib_parse_unquote(string, encoding='utf-8', errors='replace'):
  83         if string == '':
  84             return string
  85         res = string.split('%')
  86         if len(res) == 1:
  87             return string
  88         if encoding is None:
  89             encoding = 'utf-8'
  90         if errors is None:
  91             errors = 'replace'
  92         # pct_sequence: contiguous sequence of percent-encoded bytes, decoded
  93         pct_sequence = b''
  94         string = res[0]
  95         for item in res[1:]:
  96             try:
  97                 if not item:
  98                     raise ValueError
  99                 pct_sequence += item[:2].decode('hex')
 100                 rest = item[2:]
 101                 if not rest:
 102                     # This segment was just a single percent-encoded character.
 103                     # May be part of a sequence of code units, so delay decoding.
 104                     # (Stored in pct_sequence).
 105                     continue
 106             except ValueError:
 107                 rest = '%' + item
 108             # Encountered non-percent-encoded characters. Flush the current
 109             # pct_sequence.
 110             string += pct_sequence.decode(encoding, errors) + rest
 111             pct_sequence = b''
 112         if pct_sequence:
 113             # Flush the final pct_sequence
 114             string += pct_sequence.decode(encoding, errors)
 115         return string
 116
 117 try:
 118     compat_str = unicode  # Python 2
 119 except NameError:
 120     compat_str = str
 121
 122 try:
 123     compat_basestring = basestring  # Python 2
 124 except NameError:
 125     compat_basestring = str
 126
 127 try:
 128     compat_chr = unichr  # Python 2
 129 except NameError:
 130     compat_chr = chr
 131
 132 try:
 133     from xml.etree.ElementTree import ParseError as compat_xml_parse_error
 134 except ImportError:  # Python 2.6
 135     from xml.parsers.expat import ExpatError as compat_xml_parse_error
 136
 137
 138 try:
 139     from urllib.parse import parse_qs as compat_parse_qs
 140 except ImportError:  # Python 2
 141     # HACK: The following is the correct parse_qs implementation from cpython 3's stdlib.
 142     # Python 2's version is apparently totally broken
 143
 144     def _parse_qsl(qs, keep_blank_values=False, strict_parsing=False,
 145                    encoding='utf-8', errors='replace'):
 146         qs, _coerce_result = qs, compat_str
 147         pairs = [s2 for s1 in qs.split('&') for s2 in s1.split(';')]
 148         r = []
 149         for name_value in pairs:
 150             if not name_value and not strict_parsing:
 151                 continue
 152             nv = name_value.split('=', 1)
 153             if len(nv) != 2:
 154                 if strict_parsing:
 155                     raise ValueError("bad query field: %r" % (name_value,))
 156                 # Handle case of a control-name with no equal sign
 157                 if keep_blank_values:
 158                     nv.append('')
 159                 else:
 160                     continue
 161             if len(nv[1]) or keep_blank_values:
 162                 name = nv[0].replace('+', ' ')
 163                 name = compat_urllib_parse_unquote(
 164                     name, encoding=encoding, errors=errors)
 165                 name = _coerce_result(name)
 166                 value = nv[1].replace('+', ' ')
 167                 value = compat_urllib_parse_unquote(
 168                     value, encoding=encoding, errors=errors)
 169                 value = _coerce_result(value)
 170                 r.append((name, value))
 171         return r
 172
 173     def compat_parse_qs(qs, keep_blank_values=False, strict_parsing=False,
 174                         encoding='utf-8', errors='replace'):
 175         parsed_result = {}
 176         pairs = _parse_qsl(qs, keep_blank_values, strict_parsing,
 177                            encoding=encoding, errors=errors)
 178         for name, value in pairs:
 179             if name in parsed_result:
 180                 parsed_result[name].append(value)
 181             else:
 182                 parsed_result[name] = [value]
 183         return parsed_result
 184
 185 try:
 186     from shlex import quote as shlex_quote
 187 except ImportError:  # Python < 3.3
 188     def shlex_quote(s):
 189         if re.match(r'^[-_\w./]+$', s):
 190             return s
 191         else:
 192             return "'" + s.replace("'", "'\"'\"'") + "'"
 193
 194
 195 def compat_ord(c):
 196     if type(c) is int:
 197         return c
 198     else:
 199         return ord(c)
 200
 201
 202 if sys.version_info >= (3, 0):
 203     compat_getenv = os.getenv
 204     compat_expanduser = os.path.expanduser
 205 else:
 206     # Environment variables should be decoded with filesystem encoding.
 207     # Otherwise it will fail if any non-ASCII characters present (see #3854 #3217 #2918)
 208
 209     def compat_getenv(key, default=None):
 210         from .utils import get_filesystem_encoding
 211         env = os.getenv(key, default)
 212         if env:
 213             env = env.decode(get_filesystem_encoding())
 214         return env
 215
 216     # HACK: The default implementations of os.path.expanduser from cpython do not decode
 217     # environment variables with filesystem encoding. We will work around this by
 218     # providing adjusted implementations.
 219     # The following are os.path.expanduser implementations from cpython 2.7.8 stdlib
 220     # for different platforms with correct environment variables decoding.
 221
 222     if os.name == 'posix':
 223         def compat_expanduser(path):
 224             """Expand ~ and ~user constructions.  If user or $HOME is unknown,
 225             do nothing."""
 226             if not path.startswith('~'):
 227                 return path
 228             i = path.find('/', 1)
 229             if i < 0:
 230                 i = len(path)
 231             if i == 1:
 232                 if 'HOME' not in os.environ:
 233                     import pwd
 234                     userhome = pwd.getpwuid(os.getuid()).pw_dir
 235                 else:
 236                     userhome = compat_getenv('HOME')
 237             else:
 238                 import pwd
 239                 try:
 240                     pwent = pwd.getpwnam(path[1:i])
 241                 except KeyError:
 242                     return path
 243                 userhome = pwent.pw_dir
 244             userhome = userhome.rstrip('/')
 245             return (userhome + path[i:]) or '/'
 246     elif os.name == 'nt' or os.name == 'ce':
 247         def compat_expanduser(path):
 248             """Expand ~ and ~user constructs.
 249
 250             If user or $HOME is unknown, do nothing."""
 251             if path[:1] != '~':
 252                 return path
 253             i, n = 1, len(path)
 254             while i < n and path[i] not in '/\\':
 255                 i = i + 1
 256
 257             if 'HOME' in os.environ:
 258                 userhome = compat_getenv('HOME')
 259             elif 'USERPROFILE' in os.environ:
 260                 userhome = compat_getenv('USERPROFILE')
 261             elif 'HOMEPATH' not in os.environ:
 262                 return path
 263             else:
 264                 try:
 265                     drive = compat_getenv('HOMEDRIVE')
 266                 except KeyError:
 267                     drive = ''
 268                 userhome = os.path.join(drive, compat_getenv('HOMEPATH'))
 269
 270             if i != 1:  # ~user
 271                 userhome = os.path.join(os.path.dirname(userhome), path[1:i])
 272
 273             return userhome + path[i:]
 274     else:
 275         compat_expanduser = os.path.expanduser
 276
 277
 278 if sys.version_info < (3, 0):
 279     def compat_print(s):
 280         from .utils import preferredencoding
 281         print(s.encode(preferredencoding(), 'xmlcharrefreplace'))
 282 else:
 283     def compat_print(s):
 284         assert isinstance(s, compat_str)
 285         print(s)
 286
 287
 288 try:
 289     subprocess_check_output = subprocess.check_output
 290 except AttributeError:
 291     def subprocess_check_output(*args, **kwargs):
 292         assert 'input' not in kwargs
 293         p = subprocess.Popen(*args, stdout=subprocess.PIPE, **kwargs)
 294         output, _ = p.communicate()
 295         ret = p.poll()
 296         if ret:
 297             raise subprocess.CalledProcessError(ret, p.args, output=output)
 298         return output
 299
 300 if sys.version_info < (3, 0) and sys.platform == 'win32':
 301     def compat_getpass(prompt, *args, **kwargs):
 302         if isinstance(prompt, compat_str):
 303             from .utils import preferredencoding
 304             prompt = prompt.encode(preferredencoding())
 305         return getpass.getpass(prompt, *args, **kwargs)
 306 else:
 307     compat_getpass = getpass.getpass
 308
 309 # Old 2.6 and 2.7 releases require kwargs to be bytes
 310 try:
 311     def _testfunc(x):
 312         pass
 313     _testfunc(**{'x': 0})
 314 except TypeError:
 315     def compat_kwargs(kwargs):
 316         return dict((bytes(k), v) for k, v in kwargs.items())
 317 else:
 318     compat_kwargs = lambda kwargs: kwargs
 319
 320
 321 if sys.version_info < (2, 7):
 322     def compat_socket_create_connection(address, timeout, source_address=None):
 323         host, port = address
 324         err = None
 325         for res in socket.getaddrinfo(host, port, 0, socket.SOCK_STREAM):
 326             af, socktype, proto, canonname, sa = res
 327             sock = None
 328             try:
 329                 sock = socket.socket(af, socktype, proto)
 330                 sock.settimeout(timeout)
 331                 if source_address:
 332                     sock.bind(source_address)
 333                 sock.connect(sa)
 334                 return sock
 335             except socket.error as _:
 336                 err = _
 337                 if sock is not None:
 338                     sock.close()
 339         if err is not None:
 340             raise err
 341         else:
 342             raise socket.error("getaddrinfo returns an empty list")
 343 else:
 344     compat_socket_create_connection = socket.create_connection
 345
 346
 347 # Fix https://github.com/rg3/youtube-dl/issues/4223
 348 # See http://bugs.python.org/issue9161 for what is broken
 349 def workaround_optparse_bug9161():
 350     op = optparse.OptionParser()
 351     og = optparse.OptionGroup(op, 'foo')
 352     try:
 353         og.add_option('-t')
 354     except TypeError:
 355         real_add_option = optparse.OptionGroup.add_option
 356
 357         def _compat_add_option(self, *args, **kwargs):
 358             enc = lambda v: (
 359                 v.encode('ascii', 'replace') if isinstance(v, compat_str)
 360                 else v)
 361             bargs = [enc(a) for a in args]
 362             bkwargs = dict(
 363                 (k, enc(v)) for k, v in kwargs.items())
 364             return real_add_option(self, *bargs, **bkwargs)
 365         optparse.OptionGroup.add_option = _compat_add_option
 366
 367
 368 __all__ = [
 369     'compat_HTTPError',
 370     'compat_basestring',
 371     'compat_chr',
 372     'compat_cookiejar',
 373     'compat_expanduser',
 374     'compat_getenv',
 375     'compat_getpass',
 376     'compat_html_entities',
 377     'compat_html_parser',
 378     'compat_http_client',
 379     'compat_http_server',
 380     'compat_kwargs',
 381     'compat_ord',
 382     'compat_parse_qs',
 383     'compat_print',
 384     'compat_socket_create_connection',
 385     'compat_str',
 386     'compat_subprocess_get_DEVNULL',
 387     'compat_urllib_error',
 388     'compat_urllib_parse',
 389     'compat_urllib_parse_unquote',
 390     'compat_urllib_parse_urlparse',
 391     'compat_urllib_request',
 392     'compat_urlparse',
 393     'compat_urlretrieve',
 394     'compat_xml_parse_error',
 395     'shlex_quote',
 396     'subprocess_check_output',
 397     'workaround_optparse_bug9161',
 398 ]