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[youtubedl] / youtube_dl / compat.py
1 from __future__ import unicode_literals
2
3 import collections
4 import getpass
5 import optparse
6 import os
7 import re
8 import shutil
9 import socket
10 import subprocess
11 import sys
12
13
14 try:
15 import urllib.request as compat_urllib_request
16 except ImportError: # Python 2
17 import urllib2 as compat_urllib_request
18
19 try:
20 import urllib.error as compat_urllib_error
21 except ImportError: # Python 2
22 import urllib2 as compat_urllib_error
23
24 try:
25 import urllib.parse as compat_urllib_parse
26 except ImportError: # Python 2
27 import urllib as compat_urllib_parse
28
29 try:
30 from urllib.parse import urlparse as compat_urllib_parse_urlparse
31 except ImportError: # Python 2
32 from urlparse import urlparse as compat_urllib_parse_urlparse
33
34 try:
35 import urllib.parse as compat_urlparse
36 except ImportError: # Python 2
37 import urlparse as compat_urlparse
38
39 try:
40 import http.cookiejar as compat_cookiejar
41 except ImportError: # Python 2
42 import cookielib as compat_cookiejar
43
44 try:
45 import html.entities as compat_html_entities
46 except ImportError: # Python 2
47 import htmlentitydefs as compat_html_entities
48
49 try:
50 import http.client as compat_http_client
51 except ImportError: # Python 2
52 import httplib as compat_http_client
53
54 try:
55 from urllib.error import HTTPError as compat_HTTPError
56 except ImportError: # Python 2
57 from urllib2 import HTTPError as compat_HTTPError
58
59 try:
60 from urllib.request import urlretrieve as compat_urlretrieve
61 except ImportError: # Python 2
62 from urllib import urlretrieve as compat_urlretrieve
63
64
65 try:
66 from subprocess import DEVNULL
67 compat_subprocess_get_DEVNULL = lambda: DEVNULL
68 except ImportError:
69 compat_subprocess_get_DEVNULL = lambda: open(os.path.devnull, 'w')
70
71 try:
72 import http.server as compat_http_server
73 except ImportError:
74 import BaseHTTPServer as compat_http_server
75
76 try:
77 from urllib.parse import unquote as compat_urllib_parse_unquote
78 except ImportError:
79 def compat_urllib_parse_unquote(string, encoding='utf-8', errors='replace'):
80 if string == '':
81 return string
82 res = string.split('%')
83 if len(res) == 1:
84 return string
85 if encoding is None:
86 encoding = 'utf-8'
87 if errors is None:
88 errors = 'replace'
89 # pct_sequence: contiguous sequence of percent-encoded bytes, decoded
90 pct_sequence = b''
91 string = res[0]
92 for item in res[1:]:
93 try:
94 if not item:
95 raise ValueError
96 pct_sequence += item[:2].decode('hex')
97 rest = item[2:]
98 if not rest:
99 # This segment was just a single percent-encoded character.
100 # May be part of a sequence of code units, so delay decoding.
101 # (Stored in pct_sequence).
102 continue
103 except ValueError:
104 rest = '%' + item
105 # Encountered non-percent-encoded characters. Flush the current
106 # pct_sequence.
107 string += pct_sequence.decode(encoding, errors) + rest
108 pct_sequence = b''
109 if pct_sequence:
110 # Flush the final pct_sequence
111 string += pct_sequence.decode(encoding, errors)
112 return string
113
114 try:
115 compat_str = unicode # Python 2
116 except NameError:
117 compat_str = str
118
119 try:
120 compat_basestring = basestring # Python 2
121 except NameError:
122 compat_basestring = str
123
124 try:
125 compat_chr = unichr # Python 2
126 except NameError:
127 compat_chr = chr
128
129 try:
130 from xml.etree.ElementTree import ParseError as compat_xml_parse_error
131 except ImportError: # Python 2.6
132 from xml.parsers.expat import ExpatError as compat_xml_parse_error
133
134
135 try:
136 from urllib.parse import parse_qs as compat_parse_qs
137 except ImportError: # Python 2
138 # HACK: The following is the correct parse_qs implementation from cpython 3's stdlib.
139 # Python 2's version is apparently totally broken
140
141 def _parse_qsl(qs, keep_blank_values=False, strict_parsing=False,
142 encoding='utf-8', errors='replace'):
143 qs, _coerce_result = qs, compat_str
144 pairs = [s2 for s1 in qs.split('&') for s2 in s1.split(';')]
145 r = []
146 for name_value in pairs:
147 if not name_value and not strict_parsing:
148 continue
149 nv = name_value.split('=', 1)
150 if len(nv) != 2:
151 if strict_parsing:
152 raise ValueError("bad query field: %r" % (name_value,))
153 # Handle case of a control-name with no equal sign
154 if keep_blank_values:
155 nv.append('')
156 else:
157 continue
158 if len(nv[1]) or keep_blank_values:
159 name = nv[0].replace('+', ' ')
160 name = compat_urllib_parse_unquote(
161 name, encoding=encoding, errors=errors)
162 name = _coerce_result(name)
163 value = nv[1].replace('+', ' ')
164 value = compat_urllib_parse_unquote(
165 value, encoding=encoding, errors=errors)
166 value = _coerce_result(value)
167 r.append((name, value))
168 return r
169
170 def compat_parse_qs(qs, keep_blank_values=False, strict_parsing=False,
171 encoding='utf-8', errors='replace'):
172 parsed_result = {}
173 pairs = _parse_qsl(qs, keep_blank_values, strict_parsing,
174 encoding=encoding, errors=errors)
175 for name, value in pairs:
176 if name in parsed_result:
177 parsed_result[name].append(value)
178 else:
179 parsed_result[name] = [value]
180 return parsed_result
181
182 try:
183 from shlex import quote as shlex_quote
184 except ImportError: # Python < 3.3
185 def shlex_quote(s):
186 if re.match(r'^[-_\w./]+$', s):
187 return s
188 else:
189 return "'" + s.replace("'", "'\"'\"'") + "'"
190
191
192 def compat_ord(c):
193 if type(c) is int:
194 return c
195 else:
196 return ord(c)
197
198
199 if sys.version_info >= (3, 0):
200 compat_getenv = os.getenv
201 compat_expanduser = os.path.expanduser
202 else:
203 # Environment variables should be decoded with filesystem encoding.
204 # Otherwise it will fail if any non-ASCII characters present (see #3854 #3217 #2918)
205
206 def compat_getenv(key, default=None):
207 from .utils import get_filesystem_encoding
208 env = os.getenv(key, default)
209 if env:
210 env = env.decode(get_filesystem_encoding())
211 return env
212
213 # HACK: The default implementations of os.path.expanduser from cpython do not decode
214 # environment variables with filesystem encoding. We will work around this by
215 # providing adjusted implementations.
216 # The following are os.path.expanduser implementations from cpython 2.7.8 stdlib
217 # for different platforms with correct environment variables decoding.
218
219 if os.name == 'posix':
220 def compat_expanduser(path):
221 """Expand ~ and ~user constructions. If user or $HOME is unknown,
222 do nothing."""
223 if not path.startswith('~'):
224 return path
225 i = path.find('/', 1)
226 if i < 0:
227 i = len(path)
228 if i == 1:
229 if 'HOME' not in os.environ:
230 import pwd
231 userhome = pwd.getpwuid(os.getuid()).pw_dir
232 else:
233 userhome = compat_getenv('HOME')
234 else:
235 import pwd
236 try:
237 pwent = pwd.getpwnam(path[1:i])
238 except KeyError:
239 return path
240 userhome = pwent.pw_dir
241 userhome = userhome.rstrip('/')
242 return (userhome + path[i:]) or '/'
243 elif os.name == 'nt' or os.name == 'ce':
244 def compat_expanduser(path):
245 """Expand ~ and ~user constructs.
246
247 If user or $HOME is unknown, do nothing."""
248 if path[:1] != '~':
249 return path
250 i, n = 1, len(path)
251 while i < n and path[i] not in '/\\':
252 i = i + 1
253
254 if 'HOME' in os.environ:
255 userhome = compat_getenv('HOME')
256 elif 'USERPROFILE' in os.environ:
257 userhome = compat_getenv('USERPROFILE')
258 elif 'HOMEPATH' not in os.environ:
259 return path
260 else:
261 try:
262 drive = compat_getenv('HOMEDRIVE')
263 except KeyError:
264 drive = ''
265 userhome = os.path.join(drive, compat_getenv('HOMEPATH'))
266
267 if i != 1: # ~user
268 userhome = os.path.join(os.path.dirname(userhome), path[1:i])
269
270 return userhome + path[i:]
271 else:
272 compat_expanduser = os.path.expanduser
273
274
275 if sys.version_info < (3, 0):
276 def compat_print(s):
277 from .utils import preferredencoding
278 print(s.encode(preferredencoding(), 'xmlcharrefreplace'))
279 else:
280 def compat_print(s):
281 assert isinstance(s, compat_str)
282 print(s)
283
284
285 try:
286 subprocess_check_output = subprocess.check_output
287 except AttributeError:
288 def subprocess_check_output(*args, **kwargs):
289 assert 'input' not in kwargs
290 p = subprocess.Popen(*args, stdout=subprocess.PIPE, **kwargs)
291 output, _ = p.communicate()
292 ret = p.poll()
293 if ret:
294 raise subprocess.CalledProcessError(ret, p.args, output=output)
295 return output
296
297 if sys.version_info < (3, 0) and sys.platform == 'win32':
298 def compat_getpass(prompt, *args, **kwargs):
299 if isinstance(prompt, compat_str):
300 from .utils import preferredencoding
301 prompt = prompt.encode(preferredencoding())
302 return getpass.getpass(prompt, *args, **kwargs)
303 else:
304 compat_getpass = getpass.getpass
305
306 # Old 2.6 and 2.7 releases require kwargs to be bytes
307 try:
308 def _testfunc(x):
309 pass
310 _testfunc(**{'x': 0})
311 except TypeError:
312 def compat_kwargs(kwargs):
313 return dict((bytes(k), v) for k, v in kwargs.items())
314 else:
315 compat_kwargs = lambda kwargs: kwargs
316
317
318 if sys.version_info < (2, 7):
319 def compat_socket_create_connection(address, timeout, source_address=None):
320 host, port = address
321 err = None
322 for res in socket.getaddrinfo(host, port, 0, socket.SOCK_STREAM):
323 af, socktype, proto, canonname, sa = res
324 sock = None
325 try:
326 sock = socket.socket(af, socktype, proto)
327 sock.settimeout(timeout)
328 if source_address:
329 sock.bind(source_address)
330 sock.connect(sa)
331 return sock
332 except socket.error as _:
333 err = _
334 if sock is not None:
335 sock.close()
336 if err is not None:
337 raise err
338 else:
339 raise socket.error("getaddrinfo returns an empty list")
340 else:
341 compat_socket_create_connection = socket.create_connection
342
343
344 # Fix https://github.com/rg3/youtube-dl/issues/4223
345 # See http://bugs.python.org/issue9161 for what is broken
346 def workaround_optparse_bug9161():
347 op = optparse.OptionParser()
348 og = optparse.OptionGroup(op, 'foo')
349 try:
350 og.add_option('-t')
351 except TypeError:
352 real_add_option = optparse.OptionGroup.add_option
353
354 def _compat_add_option(self, *args, **kwargs):
355 enc = lambda v: (
356 v.encode('ascii', 'replace') if isinstance(v, compat_str)
357 else v)
358 bargs = [enc(a) for a in args]
359 bkwargs = dict(
360 (k, enc(v)) for k, v in kwargs.items())
361 return real_add_option(self, *bargs, **bkwargs)
362 optparse.OptionGroup.add_option = _compat_add_option
363
364 if hasattr(shutil, 'get_terminal_size'): # Python >= 3.3
365 compat_get_terminal_size = shutil.get_terminal_size
366 else:
367 _terminal_size = collections.namedtuple('terminal_size', ['columns', 'lines'])
368
369 def compat_get_terminal_size():
370 columns = compat_getenv('COLUMNS', None)
371 if columns:
372 columns = int(columns)
373 else:
374 columns = None
375 lines = compat_getenv('LINES', None)
376 if lines:
377 lines = int(lines)
378 else:
379 lines = None
380
381 try:
382 sp = subprocess.Popen(
383 ['stty', 'size'],
384 stdout=subprocess.PIPE, stderr=subprocess.PIPE)
385 out, err = sp.communicate()
386 lines, columns = map(int, out.split())
387 except Exception:
388 pass
389 return _terminal_size(columns, lines)
390
391
392 __all__ = [
393 'compat_HTTPError',
394 'compat_basestring',
395 'compat_chr',
396 'compat_cookiejar',
397 'compat_expanduser',
398 'compat_get_terminal_size',
399 'compat_getenv',
400 'compat_getpass',
401 'compat_html_entities',
402 'compat_http_client',
403 'compat_http_server',
404 'compat_kwargs',
405 'compat_ord',
406 'compat_parse_qs',
407 'compat_print',
408 'compat_socket_create_connection',
409 'compat_str',
410 'compat_subprocess_get_DEVNULL',
411 'compat_urllib_error',
412 'compat_urllib_parse',
413 'compat_urllib_parse_unquote',
414 'compat_urllib_parse_urlparse',
415 'compat_urllib_request',
416 'compat_urlparse',
417 'compat_urlretrieve',
418 'compat_xml_parse_error',
419 'shlex_quote',
420 'subprocess_check_output',
421 'workaround_optparse_bug9161',
422 ]