import getpass import os import subprocess import sys try: import urllib.request as compat_urllib_request except ImportError: # Python 2 import urllib2 as compat_urllib_request try: import urllib.error as compat_urllib_error except ImportError: # Python 2 import urllib2 as compat_urllib_error try: import urllib.parse as compat_urllib_parse except ImportError: # Python 2 import urllib as compat_urllib_parse try: from urllib.parse import urlparse as compat_urllib_parse_urlparse except ImportError: # Python 2 from urlparse import urlparse as compat_urllib_parse_urlparse try: import urllib.parse as compat_urlparse except ImportError: # Python 2 import urlparse as compat_urlparse try: import http.cookiejar as compat_cookiejar except ImportError: # Python 2 import cookielib as compat_cookiejar try: import html.entities as compat_html_entities except ImportError: # Python 2 import htmlentitydefs as compat_html_entities try: import html.parser as compat_html_parser except ImportError: # Python 2 import HTMLParser as compat_html_parser try: import http.client as compat_http_client except ImportError: # Python 2 import httplib as compat_http_client try: from urllib.error import HTTPError as compat_HTTPError except ImportError: # Python 2 from urllib2 import HTTPError as compat_HTTPError try: from urllib.request import urlretrieve as compat_urlretrieve except ImportError: # Python 2 from urllib import urlretrieve as compat_urlretrieve try: from subprocess import DEVNULL compat_subprocess_get_DEVNULL = lambda: DEVNULL except ImportError: compat_subprocess_get_DEVNULL = lambda: open(os.path.devnull, 'w') try: from urllib.parse import unquote as compat_urllib_parse_unquote except ImportError: def compat_urllib_parse_unquote(string, encoding='utf-8', errors='replace'): if string == '': return string res = string.split('%') if len(res) == 1: return string if encoding is None: encoding = 'utf-8' if errors is None: errors = 'replace' # pct_sequence: contiguous sequence of percent-encoded bytes, decoded pct_sequence = b'' string = res[0] for item in res[1:]: try: if not item: raise ValueError pct_sequence += item[:2].decode('hex') rest = item[2:] if not rest: # This segment was just a single percent-encoded character. # May be part of a sequence of code units, so delay decoding. # (Stored in pct_sequence). continue except ValueError: rest = '%' + item # Encountered non-percent-encoded characters. Flush the current # pct_sequence. string += pct_sequence.decode(encoding, errors) + rest pct_sequence = b'' if pct_sequence: # Flush the final pct_sequence string += pct_sequence.decode(encoding, errors) return string try: from urllib.parse import parse_qs as compat_parse_qs except ImportError: # Python 2 # HACK: The following is the correct parse_qs implementation from cpython 3's stdlib. # Python 2's version is apparently totally broken def _parse_qsl(qs, keep_blank_values=False, strict_parsing=False, encoding='utf-8', errors='replace'): qs, _coerce_result = qs, unicode pairs = [s2 for s1 in qs.split('&') for s2 in s1.split(';')] r = [] for name_value in pairs: if not name_value and not strict_parsing: continue nv = name_value.split('=', 1) if len(nv) != 2: if strict_parsing: raise ValueError("bad query field: %r" % (name_value,)) # Handle case of a control-name with no equal sign if keep_blank_values: nv.append('') else: continue if len(nv[1]) or keep_blank_values: name = nv[0].replace('+', ' ') name = compat_urllib_parse_unquote( name, encoding=encoding, errors=errors) name = _coerce_result(name) value = nv[1].replace('+', ' ') value = compat_urllib_parse_unquote( value, encoding=encoding, errors=errors) value = _coerce_result(value) r.append((name, value)) return r def compat_parse_qs(qs, keep_blank_values=False, strict_parsing=False, encoding='utf-8', errors='replace'): parsed_result = {} pairs = _parse_qsl(qs, keep_blank_values, strict_parsing, encoding=encoding, errors=errors) for name, value in pairs: if name in parsed_result: parsed_result[name].append(value) else: parsed_result[name] = [value] return parsed_result try: compat_str = unicode # Python 2 except NameError: compat_str = str try: compat_chr = unichr # Python 2 except NameError: compat_chr = chr try: from xml.etree.ElementTree import ParseError as compat_xml_parse_error except ImportError: # Python 2.6 from xml.parsers.expat import ExpatError as compat_xml_parse_error try: from shlex import quote as shlex_quote except ImportError: # Python < 3.3 def shlex_quote(s): return "'" + s.replace("'", "'\"'\"'") + "'" def compat_ord(c): if type(c) is int: return c else: return ord(c) if sys.version_info >= (3, 0): compat_getenv = os.getenv compat_expanduser = os.path.expanduser else: # Environment variables should be decoded with filesystem encoding. # Otherwise it will fail if any non-ASCII characters present (see #3854 #3217 #2918) def compat_getenv(key, default=None): from .utils import get_filesystem_encoding env = os.getenv(key, default) if env: env = env.decode(get_filesystem_encoding()) return env # HACK: The default implementations of os.path.expanduser from cpython do not decode # environment variables with filesystem encoding. We will work around this by # providing adjusted implementations. # The following are os.path.expanduser implementations from cpython 2.7.8 stdlib # for different platforms with correct environment variables decoding. if os.name == 'posix': def compat_expanduser(path): """Expand ~ and ~user constructions. If user or $HOME is unknown, do nothing.""" if not path.startswith('~'): return path i = path.find('/', 1) if i < 0: i = len(path) if i == 1: if 'HOME' not in os.environ: import pwd userhome = pwd.getpwuid(os.getuid()).pw_dir else: userhome = compat_getenv('HOME') else: import pwd try: pwent = pwd.getpwnam(path[1:i]) except KeyError: return path userhome = pwent.pw_dir userhome = userhome.rstrip('/') return (userhome + path[i:]) or '/' elif os.name == 'nt' or os.name == 'ce': def compat_expanduser(path): """Expand ~ and ~user constructs. If user or $HOME is unknown, do nothing.""" if path[:1] != '~': return path i, n = 1, len(path) while i < n and path[i] not in '/\\': i = i + 1 if 'HOME' in os.environ: userhome = compat_getenv('HOME') elif 'USERPROFILE' in os.environ: userhome = compat_getenv('USERPROFILE') elif not 'HOMEPATH' in os.environ: return path else: try: drive = compat_getenv('HOMEDRIVE') except KeyError: drive = '' userhome = os.path.join(drive, compat_getenv('HOMEPATH')) if i != 1: #~user userhome = os.path.join(os.path.dirname(userhome), path[1:i]) return userhome + path[i:] else: compat_expanduser = os.path.expanduser if sys.version_info < (3, 0): def compat_print(s): from .utils import preferredencoding print(s.encode(preferredencoding(), 'xmlcharrefreplace')) else: def compat_print(s): assert type(s) == type(u'') print(s) try: subprocess_check_output = subprocess.check_output except AttributeError: def subprocess_check_output(*args, **kwargs): assert 'input' not in kwargs p = subprocess.Popen(*args, stdout=subprocess.PIPE, **kwargs) output, _ = p.communicate() ret = p.poll() if ret: raise subprocess.CalledProcessError(ret, p.args, output=output) return output if sys.version_info < (3, 0) and sys.platform == 'win32': def compat_getpass(prompt, *args, **kwargs): if isinstance(prompt, compat_str): prompt = prompt.encode(preferredencoding()) return getpass.getpass(prompt, *args, **kwargs) else: compat_getpass = getpass.getpass __all__ = [ 'compat_HTTPError', 'compat_chr', 'compat_cookiejar', 'compat_expanduser', 'compat_getenv', 'compat_getpass', 'compat_html_entities', 'compat_html_parser', 'compat_http_client', 'compat_ord', 'compat_parse_qs', 'compat_print', 'compat_str', 'compat_subprocess_get_DEVNULL', 'compat_urllib_error', 'compat_urllib_parse', 'compat_urllib_parse_unquote', 'compat_urllib_parse_urlparse', 'compat_urllib_request', 'compat_urlparse', 'compat_urlretrieve', 'compat_xml_parse_error', 'shlex_quote', 'subprocess_check_output', ]