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