| 1 | """Open an arbitrary URL.
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| 2 |
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| 3 | See the following document for more info on URLs:
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| 4 | "Names and Addresses, URIs, URLs, URNs, URCs", at
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| 5 | http://www.w3.org/pub/WWW/Addressing/Overview.html
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| 6 |
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| 7 | See also the HTTP spec (from which the error codes are derived):
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| 8 | "HTTP - Hypertext Transfer Protocol", at
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| 9 | http://www.w3.org/pub/WWW/Protocols/
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| 10 |
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| 11 | Related standards and specs:
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| 12 | - RFC1808: the "relative URL" spec. (authoritative status)
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| 13 | - RFC1738 - the "URL standard". (authoritative status)
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| 14 | - RFC1630 - the "URI spec". (informational status)
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| 15 |
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| 16 | The object returned by URLopener().open(file) will differ per
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| 17 | protocol. All you know is that is has methods read(), readline(),
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| 18 | readlines(), fileno(), close() and info(). The read*(), fileno()
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| 19 | and close() methods work like those of open files.
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| 20 | The info() method returns a mimetools.Message object which can be
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| 21 | used to query various info about the object, if available.
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| 22 | (mimetools.Message objects are queried with the getheader() method.)
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| 23 | """
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| 24 |
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| 25 | import string
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| 26 | import socket
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| 27 | import os
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| 28 | import time
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| 29 | import sys
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| 30 | import base64
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| 31 | import re
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| 32 |
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| 33 | from urlparse import urljoin as basejoin
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| 34 |
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| 35 | __all__ = ["urlopen", "URLopener", "FancyURLopener", "urlretrieve",
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| 36 | "urlcleanup", "quote", "quote_plus", "unquote", "unquote_plus",
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| 37 | "urlencode", "url2pathname", "pathname2url", "splittag",
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| 38 | "localhost", "thishost", "ftperrors", "basejoin", "unwrap",
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| 39 | "splittype", "splithost", "splituser", "splitpasswd", "splitport",
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| 40 | "splitnport", "splitquery", "splitattr", "splitvalue",
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| 41 | "getproxies"]
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| 42 |
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| 43 | __version__ = '1.17' # XXX This version is not always updated :-(
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| 44 |
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| 45 | MAXFTPCACHE = 10 # Trim the ftp cache beyond this size
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| 46 |
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| 47 | # Helper for non-unix systems
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| 48 | if os.name == 'nt':
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| 49 | from nturl2path import url2pathname, pathname2url
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| 50 | elif os.name == 'riscos':
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| 51 | from rourl2path import url2pathname, pathname2url
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| 52 | else:
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| 53 | def url2pathname(pathname):
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| 54 | """OS-specific conversion from a relative URL of the 'file' scheme
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| 55 | to a file system path; not recommended for general use."""
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| 56 | return unquote(pathname)
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| 57 |
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| 58 | def pathname2url(pathname):
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| 59 | """OS-specific conversion from a file system path to a relative URL
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| 60 | of the 'file' scheme; not recommended for general use."""
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| 61 | return quote(pathname)
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| 62 |
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| 63 | # This really consists of two pieces:
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| 64 | # (1) a class which handles opening of all sorts of URLs
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| 65 | # (plus assorted utilities etc.)
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| 66 | # (2) a set of functions for parsing URLs
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| 67 | # XXX Should these be separated out into different modules?
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| 68 |
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| 69 |
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| 70 | # Shortcut for basic usage
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| 71 | _urlopener = None
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| 72 | def urlopen(url, data=None, proxies=None):
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| 73 | """Create a file-like object for the specified URL to read from."""
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| 74 | from warnings import warnpy3k
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| 75 | warnpy3k("urllib.urlopen() has been removed in Python 3.0 in "
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| 76 | "favor of urllib2.urlopen()", stacklevel=2)
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| 77 |
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| 78 | global _urlopener
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| 79 | if proxies is not None:
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| 80 | opener = FancyURLopener(proxies=proxies)
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| 81 | elif not _urlopener:
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| 82 | opener = FancyURLopener()
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| 83 | _urlopener = opener
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| 84 | else:
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| 85 | opener = _urlopener
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| 86 | if data is None:
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| 87 | return opener.open(url)
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| 88 | else:
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| 89 | return opener.open(url, data)
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| 90 | def urlretrieve(url, filename=None, reporthook=None, data=None):
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| 91 | global _urlopener
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| 92 | if not _urlopener:
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| 93 | _urlopener = FancyURLopener()
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| 94 | return _urlopener.retrieve(url, filename, reporthook, data)
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| 95 | def urlcleanup():
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| 96 | if _urlopener:
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| 97 | _urlopener.cleanup()
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| 98 | _safe_quoters.clear()
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| 99 | ftpcache.clear()
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| 100 |
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| 101 | # check for SSL
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| 102 | try:
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| 103 | import ssl
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| 104 | except:
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| 105 | _have_ssl = False
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| 106 | else:
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| 107 | _have_ssl = True
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| 108 |
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| 109 | # exception raised when downloaded size does not match content-length
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| 110 | class ContentTooShortError(IOError):
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| 111 | def __init__(self, message, content):
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| 112 | IOError.__init__(self, message)
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| 113 | self.content = content
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| 114 |
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| 115 | ftpcache = {}
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| 116 | class URLopener:
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| 117 | """Class to open URLs.
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| 118 | This is a class rather than just a subroutine because we may need
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| 119 | more than one set of global protocol-specific options.
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| 120 | Note -- this is a base class for those who don't want the
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| 121 | automatic handling of errors type 302 (relocated) and 401
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| 122 | (authorization needed)."""
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| 123 |
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| 124 | __tempfiles = None
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| 125 |
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| 126 | version = "Python-urllib/%s" % __version__
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| 127 |
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| 128 | # Constructor
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| 129 | def __init__(self, proxies=None, **x509):
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| 130 | if proxies is None:
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| 131 | proxies = getproxies()
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| 132 | assert hasattr(proxies, 'has_key'), "proxies must be a mapping"
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| 133 | self.proxies = proxies
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| 134 | self.key_file = x509.get('key_file')
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| 135 | self.cert_file = x509.get('cert_file')
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| 136 | self.addheaders = [('User-Agent', self.version)]
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| 137 | self.__tempfiles = []
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| 138 | self.__unlink = os.unlink # See cleanup()
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| 139 | self.tempcache = None
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| 140 | # Undocumented feature: if you assign {} to tempcache,
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| 141 | # it is used to cache files retrieved with
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| 142 | # self.retrieve(). This is not enabled by default
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| 143 | # since it does not work for changing documents (and I
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| 144 | # haven't got the logic to check expiration headers
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| 145 | # yet).
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| 146 | self.ftpcache = ftpcache
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| 147 | # Undocumented feature: you can use a different
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| 148 | # ftp cache by assigning to the .ftpcache member;
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| 149 | # in case you want logically independent URL openers
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| 150 | # XXX This is not threadsafe. Bah.
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| 151 |
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| 152 | def __del__(self):
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| 153 | self.close()
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| 154 |
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| 155 | def close(self):
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| 156 | self.cleanup()
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| 157 |
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| 158 | def cleanup(self):
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| 159 | # This code sometimes runs when the rest of this module
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| 160 | # has already been deleted, so it can't use any globals
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| 161 | # or import anything.
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| 162 | if self.__tempfiles:
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| 163 | for file in self.__tempfiles:
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| 164 | try:
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| 165 | self.__unlink(file)
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| 166 | except OSError:
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| 167 | pass
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| 168 | del self.__tempfiles[:]
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| 169 | if self.tempcache:
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| 170 | self.tempcache.clear()
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| 171 |
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| 172 | def addheader(self, *args):
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| 173 | """Add a header to be used by the HTTP interface only
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| 174 | e.g. u.addheader('Accept', 'sound/basic')"""
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| 175 | self.addheaders.append(args)
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| 176 |
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| 177 | # External interface
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| 178 | def open(self, fullurl, data=None):
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| 179 | """Use URLopener().open(file) instead of open(file, 'r')."""
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| 180 | fullurl = unwrap(toBytes(fullurl))
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| 181 | # percent encode url, fixing lame server errors for e.g, like space
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| 182 | # within url paths.
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| 183 | fullurl = quote(fullurl, safe="%/:=&?~#+!$,;'@()*[]|")
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| 184 | if self.tempcache and fullurl in self.tempcache:
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| 185 | filename, headers = self.tempcache[fullurl]
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| 186 | fp = open(filename, 'rb')
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| 187 | return addinfourl(fp, headers, fullurl)
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| 188 | urltype, url = splittype(fullurl)
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| 189 | if not urltype:
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| 190 | urltype = 'file'
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| 191 | if urltype in self.proxies:
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| 192 | proxy = self.proxies[urltype]
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| 193 | urltype, proxyhost = splittype(proxy)
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| 194 | host, selector = splithost(proxyhost)
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| 195 | url = (host, fullurl) # Signal special case to open_*()
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| 196 | else:
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| 197 | proxy = None
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| 198 | name = 'open_' + urltype
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| 199 | self.type = urltype
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| 200 | name = name.replace('-', '_')
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| 201 | if not hasattr(self, name):
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| 202 | if proxy:
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| 203 | return self.open_unknown_proxy(proxy, fullurl, data)
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| 204 | else:
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| 205 | return self.open_unknown(fullurl, data)
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| 206 | try:
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| 207 | if data is None:
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| 208 | return getattr(self, name)(url)
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| 209 | else:
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| 210 | return getattr(self, name)(url, data)
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| 211 | except socket.error, msg:
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| 212 | raise IOError, ('socket error', msg), sys.exc_info()[2]
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| 213 |
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| 214 | def open_unknown(self, fullurl, data=None):
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| 215 | """Overridable interface to open unknown URL type."""
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| 216 | type, url = splittype(fullurl)
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| 217 | raise IOError, ('url error', 'unknown url type', type)
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| 218 |
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| 219 | def open_unknown_proxy(self, proxy, fullurl, data=None):
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| 220 | """Overridable interface to open unknown URL type."""
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| 221 | type, url = splittype(fullurl)
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| 222 | raise IOError, ('url error', 'invalid proxy for %s' % type, proxy)
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| 223 |
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| 224 | # External interface
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| 225 | def retrieve(self, url, filename=None, reporthook=None, data=None):
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| 226 | """retrieve(url) returns (filename, headers) for a local object
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| 227 | or (tempfilename, headers) for a remote object."""
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| 228 | url = unwrap(toBytes(url))
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| 229 | if self.tempcache and url in self.tempcache:
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| 230 | return self.tempcache[url]
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| 231 | type, url1 = splittype(url)
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| 232 | if filename is None and (not type or type == 'file'):
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| 233 | try:
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| 234 | fp = self.open_local_file(url1)
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| 235 | hdrs = fp.info()
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| 236 | fp.close()
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| 237 | return url2pathname(splithost(url1)[1]), hdrs
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| 238 | except IOError:
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| 239 | pass
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| 240 | fp = self.open(url, data)
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| 241 | try:
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| 242 | headers = fp.info()
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| 243 | if filename:
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| 244 | tfp = open(filename, 'wb')
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| 245 | else:
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| 246 | import tempfile
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| 247 | garbage, path = splittype(url)
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| 248 | garbage, path = splithost(path or "")
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| 249 | path, garbage = splitquery(path or "")
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| 250 | path, garbage = splitattr(path or "")
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| 251 | suffix = os.path.splitext(path)[1]
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| 252 | (fd, filename) = tempfile.mkstemp(suffix)
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| 253 | self.__tempfiles.append(filename)
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| 254 | tfp = os.fdopen(fd, 'wb')
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| 255 | try:
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| 256 | result = filename, headers
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| 257 | if self.tempcache is not None:
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| 258 | self.tempcache[url] = result
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| 259 | bs = 1024*8
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| 260 | size = -1
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| 261 | read = 0
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| 262 | blocknum = 0
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| 263 | if "content-length" in headers:
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| 264 | size = int(headers["Content-Length"])
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| 265 | if reporthook:
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| 266 | reporthook(blocknum, bs, size)
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| 267 | while 1:
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| 268 | block = fp.read(bs)
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| 269 | if block == "":
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| 270 | break
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| 271 | read += len(block)
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| 272 | tfp.write(block)
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| 273 | blocknum += 1
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| 274 | if reporthook:
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| 275 | reporthook(blocknum, bs, size)
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| 276 | finally:
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| 277 | tfp.close()
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| 278 | finally:
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| 279 | fp.close()
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| 280 |
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| 281 | # raise exception if actual size does not match content-length header
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| 282 | if size >= 0 and read < size:
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| 283 | raise ContentTooShortError("retrieval incomplete: got only %i out "
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| 284 | "of %i bytes" % (read, size), result)
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| 285 |
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| 286 | return result
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| 287 |
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| 288 | # Each method named open_<type> knows how to open that type of URL
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| 289 |
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| 290 | def open_http(self, url, data=None):
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| 291 | """Use HTTP protocol."""
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| 292 | import httplib
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| 293 | user_passwd = None
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| 294 | proxy_passwd= None
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| 295 | if isinstance(url, str):
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| 296 | host, selector = splithost(url)
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| 297 | if host:
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| 298 | user_passwd, host = splituser(host)
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| 299 | host = unquote(host)
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| 300 | realhost = host
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| 301 | else:
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| 302 | host, selector = url
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| 303 | # check whether the proxy contains authorization information
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| 304 | proxy_passwd, host = splituser(host)
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| 305 | # now we proceed with the url we want to obtain
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| 306 | urltype, rest = splittype(selector)
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| 307 | url = rest
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| 308 | user_passwd = None
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| 309 | if urltype.lower() != 'http':
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| 310 | realhost = None
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| 311 | else:
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| 312 | realhost, rest = splithost(rest)
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| 313 | if realhost:
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| 314 | user_passwd, realhost = splituser(realhost)
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| 315 | if user_passwd:
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| 316 | selector = "%s://%s%s" % (urltype, realhost, rest)
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| 317 | if proxy_bypass(realhost):
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| 318 | host = realhost
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| 319 |
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| 320 | #print "proxy via http:", host, selector
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| 321 | if not host: raise IOError, ('http error', 'no host given')
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| 322 |
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| 323 | if proxy_passwd:
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| 324 | proxy_passwd = unquote(proxy_passwd)
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| 325 | proxy_auth = base64.b64encode(proxy_passwd).strip()
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| 326 | else:
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| 327 | proxy_auth = None
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| 328 |
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| 329 | if user_passwd:
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| 330 | user_passwd = unquote(user_passwd)
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| 331 | auth = base64.b64encode(user_passwd).strip()
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| 332 | else:
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| 333 | auth = None
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| 334 | h = httplib.HTTP(host)
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| 335 | if data is not None:
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| 336 | h.putrequest('POST', selector)
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| 337 | h.putheader('Content-Type', 'application/x-www-form-urlencoded')
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| 338 | h.putheader('Content-Length', '%d' % len(data))
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| 339 | else:
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| 340 | h.putrequest('GET', selector)
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| 341 | if proxy_auth: h.putheader('Proxy-Authorization', 'Basic %s' % proxy_auth)
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| 342 | if auth: h.putheader('Authorization', 'Basic %s' % auth)
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| 343 | if realhost: h.putheader('Host', realhost)
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| 344 | for args in self.addheaders: h.putheader(*args)
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| 345 | h.endheaders(data)
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| 346 | errcode, errmsg, headers = h.getreply()
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| 347 | fp = h.getfile()
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| 348 | if errcode == -1:
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| 349 | if fp: fp.close()
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| 350 | # something went wrong with the HTTP status line
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| 351 | raise IOError, ('http protocol error', 0,
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| 352 | 'got a bad status line', None)
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| 353 | # According to RFC 2616, "2xx" code indicates that the client's
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| 354 | # request was successfully received, understood, and accepted.
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| 355 | if (200 <= errcode < 300):
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| 356 | return addinfourl(fp, headers, "http:" + url, errcode)
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| 357 | else:
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| 358 | if data is None:
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| 359 | return self.http_error(url, fp, errcode, errmsg, headers)
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| 360 | else:
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| 361 | return self.http_error(url, fp, errcode, errmsg, headers, data)
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| 362 |
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| 363 | def http_error(self, url, fp, errcode, errmsg, headers, data=None):
|
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| 364 | """Handle http errors.
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| 365 | Derived class can override this, or provide specific handlers
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| 366 | named http_error_DDD where DDD is the 3-digit error code."""
|
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| 367 | # First check if there's a specific handler for this error
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| 368 | name = 'http_error_%d' % errcode
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| 369 | if hasattr(self, name):
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| 370 | method = getattr(self, name)
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| 371 | if data is None:
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| 372 | result = method(url, fp, errcode, errmsg, headers)
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| 373 | else:
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| 374 | result = method(url, fp, errcode, errmsg, headers, data)
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| 375 | if result: return result
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| 376 | return self.http_error_default(url, fp, errcode, errmsg, headers)
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| 377 |
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| 378 | def http_error_default(self, url, fp, errcode, errmsg, headers):
|
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| 379 | """Default error handler: close the connection and raise IOError."""
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| 380 | fp.close()
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| 381 | raise IOError, ('http error', errcode, errmsg, headers)
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| 382 |
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| 383 | if _have_ssl:
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| 384 | def open_https(self, url, data=None):
|
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| 385 | """Use HTTPS protocol."""
|
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| 386 |
|
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| 387 | import httplib
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| 388 | user_passwd = None
|
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| 389 | proxy_passwd = None
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| 390 | if isinstance(url, str):
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| 391 | host, selector = splithost(url)
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| 392 | if host:
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| 393 | user_passwd, host = splituser(host)
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| 394 | host = unquote(host)
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| 395 | realhost = host
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| 396 | else:
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| 397 | host, selector = url
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| 398 | # here, we determine, whether the proxy contains authorization information
|
|---|
| 399 | proxy_passwd, host = splituser(host)
|
|---|
| 400 | urltype, rest = splittype(selector)
|
|---|
| 401 | url = rest
|
|---|
| 402 | user_passwd = None
|
|---|
| 403 | if urltype.lower() != 'https':
|
|---|
| 404 | realhost = None
|
|---|
| 405 | else:
|
|---|
| 406 | realhost, rest = splithost(rest)
|
|---|
| 407 | if realhost:
|
|---|
| 408 | user_passwd, realhost = splituser(realhost)
|
|---|
| 409 | if user_passwd:
|
|---|
| 410 | selector = "%s://%s%s" % (urltype, realhost, rest)
|
|---|
| 411 | #print "proxy via https:", host, selector
|
|---|
| 412 | if not host: raise IOError, ('https error', 'no host given')
|
|---|
| 413 | if proxy_passwd:
|
|---|
| 414 | proxy_passwd = unquote(proxy_passwd)
|
|---|
| 415 | proxy_auth = base64.b64encode(proxy_passwd).strip()
|
|---|
| 416 | else:
|
|---|
| 417 | proxy_auth = None
|
|---|
| 418 | if user_passwd:
|
|---|
| 419 | user_passwd = unquote(user_passwd)
|
|---|
| 420 | auth = base64.b64encode(user_passwd).strip()
|
|---|
| 421 | else:
|
|---|
| 422 | auth = None
|
|---|
| 423 | h = httplib.HTTPS(host, 0,
|
|---|
| 424 | key_file=self.key_file,
|
|---|
| 425 | cert_file=self.cert_file)
|
|---|
| 426 | if data is not None:
|
|---|
| 427 | h.putrequest('POST', selector)
|
|---|
| 428 | h.putheader('Content-Type',
|
|---|
| 429 | 'application/x-www-form-urlencoded')
|
|---|
| 430 | h.putheader('Content-Length', '%d' % len(data))
|
|---|
| 431 | else:
|
|---|
| 432 | h.putrequest('GET', selector)
|
|---|
| 433 | if proxy_auth: h.putheader('Proxy-Authorization', 'Basic %s' % proxy_auth)
|
|---|
| 434 | if auth: h.putheader('Authorization', 'Basic %s' % auth)
|
|---|
| 435 | if realhost: h.putheader('Host', realhost)
|
|---|
| 436 | for args in self.addheaders: h.putheader(*args)
|
|---|
| 437 | h.endheaders(data)
|
|---|
| 438 | errcode, errmsg, headers = h.getreply()
|
|---|
| 439 | fp = h.getfile()
|
|---|
| 440 | if errcode == -1:
|
|---|
| 441 | if fp: fp.close()
|
|---|
| 442 | # something went wrong with the HTTP status line
|
|---|
| 443 | raise IOError, ('http protocol error', 0,
|
|---|
| 444 | 'got a bad status line', None)
|
|---|
| 445 | # According to RFC 2616, "2xx" code indicates that the client's
|
|---|
| 446 | # request was successfully received, understood, and accepted.
|
|---|
| 447 | if (200 <= errcode < 300):
|
|---|
| 448 | return addinfourl(fp, headers, "https:" + url, errcode)
|
|---|
| 449 | else:
|
|---|
| 450 | if data is None:
|
|---|
| 451 | return self.http_error(url, fp, errcode, errmsg, headers)
|
|---|
| 452 | else:
|
|---|
| 453 | return self.http_error(url, fp, errcode, errmsg, headers,
|
|---|
| 454 | data)
|
|---|
| 455 |
|
|---|
| 456 | def open_file(self, url):
|
|---|
| 457 | """Use local file or FTP depending on form of URL."""
|
|---|
| 458 | if not isinstance(url, str):
|
|---|
| 459 | raise IOError, ('file error', 'proxy support for file protocol currently not implemented')
|
|---|
| 460 | if url[:2] == '//' and url[2:3] != '/' and url[2:12].lower() != 'localhost/':
|
|---|
| 461 | return self.open_ftp(url)
|
|---|
| 462 | else:
|
|---|
| 463 | return self.open_local_file(url)
|
|---|
| 464 |
|
|---|
| 465 | def open_local_file(self, url):
|
|---|
| 466 | """Use local file."""
|
|---|
| 467 | import mimetypes, mimetools, email.utils
|
|---|
| 468 | try:
|
|---|
| 469 | from cStringIO import StringIO
|
|---|
| 470 | except ImportError:
|
|---|
| 471 | from StringIO import StringIO
|
|---|
| 472 | host, file = splithost(url)
|
|---|
| 473 | localname = url2pathname(file)
|
|---|
| 474 | try:
|
|---|
| 475 | stats = os.stat(localname)
|
|---|
| 476 | except OSError, e:
|
|---|
| 477 | raise IOError(e.errno, e.strerror, e.filename)
|
|---|
| 478 | size = stats.st_size
|
|---|
| 479 | modified = email.utils.formatdate(stats.st_mtime, usegmt=True)
|
|---|
| 480 | mtype = mimetypes.guess_type(url)[0]
|
|---|
| 481 | headers = mimetools.Message(StringIO(
|
|---|
| 482 | 'Content-Type: %s\nContent-Length: %d\nLast-modified: %s\n' %
|
|---|
| 483 | (mtype or 'text/plain', size, modified)))
|
|---|
| 484 | if not host:
|
|---|
| 485 | urlfile = file
|
|---|
| 486 | if file[:1] == '/':
|
|---|
| 487 | urlfile = 'file://' + file
|
|---|
| 488 | elif file[:2] == './':
|
|---|
| 489 | raise ValueError("local file url may start with / or file:. Unknown url of type: %s" % url)
|
|---|
| 490 | return addinfourl(open(localname, 'rb'),
|
|---|
| 491 | headers, urlfile)
|
|---|
| 492 | host, port = splitport(host)
|
|---|
| 493 | if not port \
|
|---|
| 494 | and socket.gethostbyname(host) in (localhost(), thishost()):
|
|---|
| 495 | urlfile = file
|
|---|
| 496 | if file[:1] == '/':
|
|---|
| 497 | urlfile = 'file://' + file
|
|---|
| 498 | return addinfourl(open(localname, 'rb'),
|
|---|
| 499 | headers, urlfile)
|
|---|
| 500 | raise IOError, ('local file error', 'not on local host')
|
|---|
| 501 |
|
|---|
| 502 | def open_ftp(self, url):
|
|---|
| 503 | """Use FTP protocol."""
|
|---|
| 504 | if not isinstance(url, str):
|
|---|
| 505 | raise IOError, ('ftp error', 'proxy support for ftp protocol currently not implemented')
|
|---|
| 506 | import mimetypes, mimetools
|
|---|
| 507 | try:
|
|---|
| 508 | from cStringIO import StringIO
|
|---|
| 509 | except ImportError:
|
|---|
| 510 | from StringIO import StringIO
|
|---|
| 511 | host, path = splithost(url)
|
|---|
| 512 | if not host: raise IOError, ('ftp error', 'no host given')
|
|---|
| 513 | host, port = splitport(host)
|
|---|
| 514 | user, host = splituser(host)
|
|---|
| 515 | if user: user, passwd = splitpasswd(user)
|
|---|
| 516 | else: passwd = None
|
|---|
| 517 | host = unquote(host)
|
|---|
| 518 | user = user or ''
|
|---|
| 519 | passwd = passwd or ''
|
|---|
| 520 | host = socket.gethostbyname(host)
|
|---|
| 521 | if not port:
|
|---|
| 522 | import ftplib
|
|---|
| 523 | port = ftplib.FTP_PORT
|
|---|
| 524 | else:
|
|---|
| 525 | port = int(port)
|
|---|
| 526 | path, attrs = splitattr(path)
|
|---|
| 527 | path = unquote(path)
|
|---|
| 528 | dirs = path.split('/')
|
|---|
| 529 | dirs, file = dirs[:-1], dirs[-1]
|
|---|
| 530 | if dirs and not dirs[0]: dirs = dirs[1:]
|
|---|
| 531 | if dirs and not dirs[0]: dirs[0] = '/'
|
|---|
| 532 | key = user, host, port, '/'.join(dirs)
|
|---|
| 533 | # XXX thread unsafe!
|
|---|
| 534 | if len(self.ftpcache) > MAXFTPCACHE:
|
|---|
| 535 | # Prune the cache, rather arbitrarily
|
|---|
| 536 | for k in self.ftpcache.keys():
|
|---|
| 537 | if k != key:
|
|---|
| 538 | v = self.ftpcache[k]
|
|---|
| 539 | del self.ftpcache[k]
|
|---|
| 540 | v.close()
|
|---|
| 541 | try:
|
|---|
| 542 | if not key in self.ftpcache:
|
|---|
| 543 | self.ftpcache[key] = \
|
|---|
| 544 | ftpwrapper(user, passwd, host, port, dirs)
|
|---|
| 545 | if not file: type = 'D'
|
|---|
| 546 | else: type = 'I'
|
|---|
| 547 | for attr in attrs:
|
|---|
| 548 | attr, value = splitvalue(attr)
|
|---|
| 549 | if attr.lower() == 'type' and \
|
|---|
| 550 | value in ('a', 'A', 'i', 'I', 'd', 'D'):
|
|---|
| 551 | type = value.upper()
|
|---|
| 552 | (fp, retrlen) = self.ftpcache[key].retrfile(file, type)
|
|---|
| 553 | mtype = mimetypes.guess_type("ftp:" + url)[0]
|
|---|
| 554 | headers = ""
|
|---|
| 555 | if mtype:
|
|---|
| 556 | headers += "Content-Type: %s\n" % mtype
|
|---|
| 557 | if retrlen is not None and retrlen >= 0:
|
|---|
| 558 | headers += "Content-Length: %d\n" % retrlen
|
|---|
| 559 | headers = mimetools.Message(StringIO(headers))
|
|---|
| 560 | return addinfourl(fp, headers, "ftp:" + url)
|
|---|
| 561 | except ftperrors(), msg:
|
|---|
| 562 | raise IOError, ('ftp error', msg), sys.exc_info()[2]
|
|---|
| 563 |
|
|---|
| 564 | def open_data(self, url, data=None):
|
|---|
| 565 | """Use "data" URL."""
|
|---|
| 566 | if not isinstance(url, str):
|
|---|
| 567 | raise IOError, ('data error', 'proxy support for data protocol currently not implemented')
|
|---|
| 568 | # ignore POSTed data
|
|---|
| 569 | #
|
|---|
| 570 | # syntax of data URLs:
|
|---|
| 571 | # dataurl := "data:" [ mediatype ] [ ";base64" ] "," data
|
|---|
| 572 | # mediatype := [ type "/" subtype ] *( ";" parameter )
|
|---|
| 573 | # data := *urlchar
|
|---|
| 574 | # parameter := attribute "=" value
|
|---|
| 575 | import mimetools
|
|---|
| 576 | try:
|
|---|
| 577 | from cStringIO import StringIO
|
|---|
| 578 | except ImportError:
|
|---|
| 579 | from StringIO import StringIO
|
|---|
| 580 | try:
|
|---|
| 581 | [type, data] = url.split(',', 1)
|
|---|
| 582 | except ValueError:
|
|---|
| 583 | raise IOError, ('data error', 'bad data URL')
|
|---|
| 584 | if not type:
|
|---|
| 585 | type = 'text/plain;charset=US-ASCII'
|
|---|
| 586 | semi = type.rfind(';')
|
|---|
| 587 | if semi >= 0 and '=' not in type[semi:]:
|
|---|
| 588 | encoding = type[semi+1:]
|
|---|
| 589 | type = type[:semi]
|
|---|
| 590 | else:
|
|---|
| 591 | encoding = ''
|
|---|
| 592 | msg = []
|
|---|
| 593 | msg.append('Date: %s'%time.strftime('%a, %d %b %Y %H:%M:%S GMT',
|
|---|
| 594 | time.gmtime(time.time())))
|
|---|
| 595 | msg.append('Content-type: %s' % type)
|
|---|
| 596 | if encoding == 'base64':
|
|---|
| 597 | data = base64.decodestring(data)
|
|---|
| 598 | else:
|
|---|
| 599 | data = unquote(data)
|
|---|
| 600 | msg.append('Content-Length: %d' % len(data))
|
|---|
| 601 | msg.append('')
|
|---|
| 602 | msg.append(data)
|
|---|
| 603 | msg = '\n'.join(msg)
|
|---|
| 604 | f = StringIO(msg)
|
|---|
| 605 | headers = mimetools.Message(f, 0)
|
|---|
| 606 | #f.fileno = None # needed for addinfourl
|
|---|
| 607 | return addinfourl(f, headers, url)
|
|---|
| 608 |
|
|---|
| 609 |
|
|---|
| 610 | class FancyURLopener(URLopener):
|
|---|
| 611 | """Derived class with handlers for errors we can handle (perhaps)."""
|
|---|
| 612 |
|
|---|
| 613 | def __init__(self, *args, **kwargs):
|
|---|
| 614 | URLopener.__init__(self, *args, **kwargs)
|
|---|
| 615 | self.auth_cache = {}
|
|---|
| 616 | self.tries = 0
|
|---|
| 617 | self.maxtries = 10
|
|---|
| 618 |
|
|---|
| 619 | def http_error_default(self, url, fp, errcode, errmsg, headers):
|
|---|
| 620 | """Default error handling -- don't raise an exception."""
|
|---|
| 621 | return addinfourl(fp, headers, "http:" + url, errcode)
|
|---|
| 622 |
|
|---|
| 623 | def http_error_302(self, url, fp, errcode, errmsg, headers, data=None):
|
|---|
| 624 | """Error 302 -- relocated (temporarily)."""
|
|---|
| 625 | self.tries += 1
|
|---|
| 626 | if self.maxtries and self.tries >= self.maxtries:
|
|---|
| 627 | if hasattr(self, "http_error_500"):
|
|---|
| 628 | meth = self.http_error_500
|
|---|
| 629 | else:
|
|---|
| 630 | meth = self.http_error_default
|
|---|
| 631 | self.tries = 0
|
|---|
| 632 | return meth(url, fp, 500,
|
|---|
| 633 | "Internal Server Error: Redirect Recursion", headers)
|
|---|
| 634 | result = self.redirect_internal(url, fp, errcode, errmsg, headers,
|
|---|
| 635 | data)
|
|---|
| 636 | self.tries = 0
|
|---|
| 637 | return result
|
|---|
| 638 |
|
|---|
| 639 | def redirect_internal(self, url, fp, errcode, errmsg, headers, data):
|
|---|
| 640 | if 'location' in headers:
|
|---|
| 641 | newurl = headers['location']
|
|---|
| 642 | elif 'uri' in headers:
|
|---|
| 643 | newurl = headers['uri']
|
|---|
| 644 | else:
|
|---|
| 645 | return
|
|---|
| 646 | fp.close()
|
|---|
| 647 | # In case the server sent a relative URL, join with original:
|
|---|
| 648 | newurl = basejoin(self.type + ":" + url, newurl)
|
|---|
| 649 |
|
|---|
| 650 | # For security reasons we do not allow redirects to protocols
|
|---|
| 651 | # other than HTTP, HTTPS or FTP.
|
|---|
| 652 | newurl_lower = newurl.lower()
|
|---|
| 653 | if not (newurl_lower.startswith('http://') or
|
|---|
| 654 | newurl_lower.startswith('https://') or
|
|---|
| 655 | newurl_lower.startswith('ftp://')):
|
|---|
| 656 | raise IOError('redirect error', errcode,
|
|---|
| 657 | errmsg + " - Redirection to url '%s' is not allowed" %
|
|---|
| 658 | newurl,
|
|---|
| 659 | headers)
|
|---|
| 660 |
|
|---|
| 661 | return self.open(newurl)
|
|---|
| 662 |
|
|---|
| 663 | def http_error_301(self, url, fp, errcode, errmsg, headers, data=None):
|
|---|
| 664 | """Error 301 -- also relocated (permanently)."""
|
|---|
| 665 | return self.http_error_302(url, fp, errcode, errmsg, headers, data)
|
|---|
| 666 |
|
|---|
| 667 | def http_error_303(self, url, fp, errcode, errmsg, headers, data=None):
|
|---|
| 668 | """Error 303 -- also relocated (essentially identical to 302)."""
|
|---|
| 669 | return self.http_error_302(url, fp, errcode, errmsg, headers, data)
|
|---|
| 670 |
|
|---|
| 671 | def http_error_307(self, url, fp, errcode, errmsg, headers, data=None):
|
|---|
| 672 | """Error 307 -- relocated, but turn POST into error."""
|
|---|
| 673 | if data is None:
|
|---|
| 674 | return self.http_error_302(url, fp, errcode, errmsg, headers, data)
|
|---|
| 675 | else:
|
|---|
| 676 | return self.http_error_default(url, fp, errcode, errmsg, headers)
|
|---|
| 677 |
|
|---|
| 678 | def http_error_401(self, url, fp, errcode, errmsg, headers, data=None):
|
|---|
| 679 | """Error 401 -- authentication required.
|
|---|
| 680 | This function supports Basic authentication only."""
|
|---|
| 681 | if not 'www-authenticate' in headers:
|
|---|
| 682 | URLopener.http_error_default(self, url, fp,
|
|---|
| 683 | errcode, errmsg, headers)
|
|---|
| 684 | stuff = headers['www-authenticate']
|
|---|
| 685 | import re
|
|---|
| 686 | match = re.match('[ \t]*([^ \t]+)[ \t]+realm="([^"]*)"', stuff)
|
|---|
| 687 | if not match:
|
|---|
| 688 | URLopener.http_error_default(self, url, fp,
|
|---|
| 689 | errcode, errmsg, headers)
|
|---|
| 690 | scheme, realm = match.groups()
|
|---|
| 691 | if scheme.lower() != 'basic':
|
|---|
| 692 | URLopener.http_error_default(self, url, fp,
|
|---|
| 693 | errcode, errmsg, headers)
|
|---|
| 694 | name = 'retry_' + self.type + '_basic_auth'
|
|---|
| 695 | if data is None:
|
|---|
| 696 | return getattr(self,name)(url, realm)
|
|---|
| 697 | else:
|
|---|
| 698 | return getattr(self,name)(url, realm, data)
|
|---|
| 699 |
|
|---|
| 700 | def http_error_407(self, url, fp, errcode, errmsg, headers, data=None):
|
|---|
| 701 | """Error 407 -- proxy authentication required.
|
|---|
| 702 | This function supports Basic authentication only."""
|
|---|
| 703 | if not 'proxy-authenticate' in headers:
|
|---|
| 704 | URLopener.http_error_default(self, url, fp,
|
|---|
| 705 | errcode, errmsg, headers)
|
|---|
| 706 | stuff = headers['proxy-authenticate']
|
|---|
| 707 | import re
|
|---|
| 708 | match = re.match('[ \t]*([^ \t]+)[ \t]+realm="([^"]*)"', stuff)
|
|---|
| 709 | if not match:
|
|---|
| 710 | URLopener.http_error_default(self, url, fp,
|
|---|
| 711 | errcode, errmsg, headers)
|
|---|
| 712 | scheme, realm = match.groups()
|
|---|
| 713 | if scheme.lower() != 'basic':
|
|---|
| 714 | URLopener.http_error_default(self, url, fp,
|
|---|
| 715 | errcode, errmsg, headers)
|
|---|
| 716 | name = 'retry_proxy_' + self.type + '_basic_auth'
|
|---|
| 717 | if data is None:
|
|---|
| 718 | return getattr(self,name)(url, realm)
|
|---|
| 719 | else:
|
|---|
| 720 | return getattr(self,name)(url, realm, data)
|
|---|
| 721 |
|
|---|
| 722 | def retry_proxy_http_basic_auth(self, url, realm, data=None):
|
|---|
| 723 | host, selector = splithost(url)
|
|---|
| 724 | newurl = 'http://' + host + selector
|
|---|
| 725 | proxy = self.proxies['http']
|
|---|
| 726 | urltype, proxyhost = splittype(proxy)
|
|---|
| 727 | proxyhost, proxyselector = splithost(proxyhost)
|
|---|
| 728 | i = proxyhost.find('@') + 1
|
|---|
| 729 | proxyhost = proxyhost[i:]
|
|---|
| 730 | user, passwd = self.get_user_passwd(proxyhost, realm, i)
|
|---|
| 731 | if not (user or passwd): return None
|
|---|
| 732 | proxyhost = quote(user, safe='') + ':' + quote(passwd, safe='') + '@' + proxyhost
|
|---|
| 733 | self.proxies['http'] = 'http://' + proxyhost + proxyselector
|
|---|
| 734 | if data is None:
|
|---|
| 735 | return self.open(newurl)
|
|---|
| 736 | else:
|
|---|
| 737 | return self.open(newurl, data)
|
|---|
| 738 |
|
|---|
| 739 | def retry_proxy_https_basic_auth(self, url, realm, data=None):
|
|---|
| 740 | host, selector = splithost(url)
|
|---|
| 741 | newurl = 'https://' + host + selector
|
|---|
| 742 | proxy = self.proxies['https']
|
|---|
| 743 | urltype, proxyhost = splittype(proxy)
|
|---|
| 744 | proxyhost, proxyselector = splithost(proxyhost)
|
|---|
| 745 | i = proxyhost.find('@') + 1
|
|---|
| 746 | proxyhost = proxyhost[i:]
|
|---|
| 747 | user, passwd = self.get_user_passwd(proxyhost, realm, i)
|
|---|
| 748 | if not (user or passwd): return None
|
|---|
| 749 | proxyhost = quote(user, safe='') + ':' + quote(passwd, safe='') + '@' + proxyhost
|
|---|
| 750 | self.proxies['https'] = 'https://' + proxyhost + proxyselector
|
|---|
| 751 | if data is None:
|
|---|
| 752 | return self.open(newurl)
|
|---|
| 753 | else:
|
|---|
| 754 | return self.open(newurl, data)
|
|---|
| 755 |
|
|---|
| 756 | def retry_http_basic_auth(self, url, realm, data=None):
|
|---|
| 757 | host, selector = splithost(url)
|
|---|
| 758 | i = host.find('@') + 1
|
|---|
| 759 | host = host[i:]
|
|---|
| 760 | user, passwd = self.get_user_passwd(host, realm, i)
|
|---|
| 761 | if not (user or passwd): return None
|
|---|
| 762 | host = quote(user, safe='') + ':' + quote(passwd, safe='') + '@' + host
|
|---|
| 763 | newurl = 'http://' + host + selector
|
|---|
| 764 | if data is None:
|
|---|
| 765 | return self.open(newurl)
|
|---|
| 766 | else:
|
|---|
| 767 | return self.open(newurl, data)
|
|---|
| 768 |
|
|---|
| 769 | def retry_https_basic_auth(self, url, realm, data=None):
|
|---|
| 770 | host, selector = splithost(url)
|
|---|
| 771 | i = host.find('@') + 1
|
|---|
| 772 | host = host[i:]
|
|---|
| 773 | user, passwd = self.get_user_passwd(host, realm, i)
|
|---|
| 774 | if not (user or passwd): return None
|
|---|
| 775 | host = quote(user, safe='') + ':' + quote(passwd, safe='') + '@' + host
|
|---|
| 776 | newurl = 'https://' + host + selector
|
|---|
| 777 | if data is None:
|
|---|
| 778 | return self.open(newurl)
|
|---|
| 779 | else:
|
|---|
| 780 | return self.open(newurl, data)
|
|---|
| 781 |
|
|---|
| 782 | def get_user_passwd(self, host, realm, clear_cache=0):
|
|---|
| 783 | key = realm + '@' + host.lower()
|
|---|
| 784 | if key in self.auth_cache:
|
|---|
| 785 | if clear_cache:
|
|---|
| 786 | del self.auth_cache[key]
|
|---|
| 787 | else:
|
|---|
| 788 | return self.auth_cache[key]
|
|---|
| 789 | user, passwd = self.prompt_user_passwd(host, realm)
|
|---|
| 790 | if user or passwd: self.auth_cache[key] = (user, passwd)
|
|---|
| 791 | return user, passwd
|
|---|
| 792 |
|
|---|
| 793 | def prompt_user_passwd(self, host, realm):
|
|---|
| 794 | """Override this in a GUI environment!"""
|
|---|
| 795 | import getpass
|
|---|
| 796 | try:
|
|---|
| 797 | user = raw_input("Enter username for %s at %s: " % (realm,
|
|---|
| 798 | host))
|
|---|
| 799 | passwd = getpass.getpass("Enter password for %s in %s at %s: " %
|
|---|
| 800 | (user, realm, host))
|
|---|
| 801 | return user, passwd
|
|---|
| 802 | except KeyboardInterrupt:
|
|---|
| 803 | print
|
|---|
| 804 | return None, None
|
|---|
| 805 |
|
|---|
| 806 |
|
|---|
| 807 | # Utility functions
|
|---|
| 808 |
|
|---|
| 809 | _localhost = None
|
|---|
| 810 | def localhost():
|
|---|
| 811 | """Return the IP address of the magic hostname 'localhost'."""
|
|---|
| 812 | global _localhost
|
|---|
| 813 | if _localhost is None:
|
|---|
| 814 | _localhost = socket.gethostbyname('localhost')
|
|---|
| 815 | return _localhost
|
|---|
| 816 |
|
|---|
| 817 | _thishost = None
|
|---|
| 818 | def thishost():
|
|---|
| 819 | """Return the IP address of the current host."""
|
|---|
| 820 | global _thishost
|
|---|
| 821 | if _thishost is None:
|
|---|
| 822 | try:
|
|---|
| 823 | _thishost = socket.gethostbyname(socket.gethostname())
|
|---|
| 824 | except socket.gaierror:
|
|---|
| 825 | _thishost = socket.gethostbyname('localhost')
|
|---|
| 826 | return _thishost
|
|---|
| 827 |
|
|---|
| 828 | _ftperrors = None
|
|---|
| 829 | def ftperrors():
|
|---|
| 830 | """Return the set of errors raised by the FTP class."""
|
|---|
| 831 | global _ftperrors
|
|---|
| 832 | if _ftperrors is None:
|
|---|
| 833 | import ftplib
|
|---|
| 834 | _ftperrors = ftplib.all_errors
|
|---|
| 835 | return _ftperrors
|
|---|
| 836 |
|
|---|
| 837 | _noheaders = None
|
|---|
| 838 | def noheaders():
|
|---|
| 839 | """Return an empty mimetools.Message object."""
|
|---|
| 840 | global _noheaders
|
|---|
| 841 | if _noheaders is None:
|
|---|
| 842 | import mimetools
|
|---|
| 843 | try:
|
|---|
| 844 | from cStringIO import StringIO
|
|---|
| 845 | except ImportError:
|
|---|
| 846 | from StringIO import StringIO
|
|---|
| 847 | _noheaders = mimetools.Message(StringIO(), 0)
|
|---|
| 848 | _noheaders.fp.close() # Recycle file descriptor
|
|---|
| 849 | return _noheaders
|
|---|
| 850 |
|
|---|
| 851 |
|
|---|
| 852 | # Utility classes
|
|---|
| 853 |
|
|---|
| 854 | class ftpwrapper:
|
|---|
| 855 | """Class used by open_ftp() for cache of open FTP connections."""
|
|---|
| 856 |
|
|---|
| 857 | def __init__(self, user, passwd, host, port, dirs,
|
|---|
| 858 | timeout=socket._GLOBAL_DEFAULT_TIMEOUT,
|
|---|
| 859 | persistent=True):
|
|---|
| 860 | self.user = user
|
|---|
| 861 | self.passwd = passwd
|
|---|
| 862 | self.host = host
|
|---|
| 863 | self.port = port
|
|---|
| 864 | self.dirs = dirs
|
|---|
| 865 | self.timeout = timeout
|
|---|
| 866 | self.refcount = 0
|
|---|
| 867 | self.keepalive = persistent
|
|---|
| 868 | self.init()
|
|---|
| 869 |
|
|---|
| 870 | def init(self):
|
|---|
| 871 | import ftplib
|
|---|
| 872 | self.busy = 0
|
|---|
| 873 | self.ftp = ftplib.FTP()
|
|---|
| 874 | self.ftp.connect(self.host, self.port, self.timeout)
|
|---|
| 875 | self.ftp.login(self.user, self.passwd)
|
|---|
| 876 | _target = '/'.join(self.dirs)
|
|---|
| 877 | self.ftp.cwd(_target)
|
|---|
| 878 |
|
|---|
| 879 | def retrfile(self, file, type):
|
|---|
| 880 | import ftplib
|
|---|
| 881 | self.endtransfer()
|
|---|
| 882 | if type in ('d', 'D'): cmd = 'TYPE A'; isdir = 1
|
|---|
| 883 | else: cmd = 'TYPE ' + type; isdir = 0
|
|---|
| 884 | try:
|
|---|
| 885 | self.ftp.voidcmd(cmd)
|
|---|
| 886 | except ftplib.all_errors:
|
|---|
| 887 | self.init()
|
|---|
| 888 | self.ftp.voidcmd(cmd)
|
|---|
| 889 | conn = None
|
|---|
| 890 | if file and not isdir:
|
|---|
| 891 | # Try to retrieve as a file
|
|---|
| 892 | try:
|
|---|
| 893 | cmd = 'RETR ' + file
|
|---|
| 894 | conn, retrlen = self.ftp.ntransfercmd(cmd)
|
|---|
| 895 | except ftplib.error_perm, reason:
|
|---|
| 896 | if str(reason)[:3] != '550':
|
|---|
| 897 | raise IOError, ('ftp error', reason), sys.exc_info()[2]
|
|---|
| 898 | if not conn:
|
|---|
| 899 | # Set transfer mode to ASCII!
|
|---|
| 900 | self.ftp.voidcmd('TYPE A')
|
|---|
| 901 | # Try a directory listing. Verify that directory exists.
|
|---|
| 902 | if file:
|
|---|
| 903 | pwd = self.ftp.pwd()
|
|---|
| 904 | try:
|
|---|
| 905 | try:
|
|---|
| 906 | self.ftp.cwd(file)
|
|---|
| 907 | except ftplib.error_perm, reason:
|
|---|
| 908 | raise IOError, ('ftp error', reason), sys.exc_info()[2]
|
|---|
| 909 | finally:
|
|---|
| 910 | self.ftp.cwd(pwd)
|
|---|
| 911 | cmd = 'LIST ' + file
|
|---|
| 912 | else:
|
|---|
| 913 | cmd = 'LIST'
|
|---|
| 914 | conn, retrlen = self.ftp.ntransfercmd(cmd)
|
|---|
| 915 | self.busy = 1
|
|---|
| 916 | ftpobj = addclosehook(conn.makefile('rb'), self.file_close)
|
|---|
| 917 | self.refcount += 1
|
|---|
| 918 | conn.close()
|
|---|
| 919 | # Pass back both a suitably decorated object and a retrieval length
|
|---|
| 920 | return (ftpobj, retrlen)
|
|---|
| 921 |
|
|---|
| 922 | def endtransfer(self):
|
|---|
| 923 | if not self.busy:
|
|---|
| 924 | return
|
|---|
| 925 | self.busy = 0
|
|---|
| 926 | try:
|
|---|
| 927 | self.ftp.voidresp()
|
|---|
| 928 | except ftperrors():
|
|---|
| 929 | pass
|
|---|
| 930 |
|
|---|
| 931 | def close(self):
|
|---|
| 932 | self.keepalive = False
|
|---|
| 933 | if self.refcount <= 0:
|
|---|
| 934 | self.real_close()
|
|---|
| 935 |
|
|---|
| 936 | def file_close(self):
|
|---|
| 937 | self.endtransfer()
|
|---|
| 938 | self.refcount -= 1
|
|---|
| 939 | if self.refcount <= 0 and not self.keepalive:
|
|---|
| 940 | self.real_close()
|
|---|
| 941 |
|
|---|
| 942 | def real_close(self):
|
|---|
| 943 | self.endtransfer()
|
|---|
| 944 | try:
|
|---|
| 945 | self.ftp.close()
|
|---|
| 946 | except ftperrors():
|
|---|
| 947 | pass
|
|---|
| 948 |
|
|---|
| 949 | class addbase:
|
|---|
| 950 | """Base class for addinfo and addclosehook."""
|
|---|
| 951 |
|
|---|
| 952 | def __init__(self, fp):
|
|---|
| 953 | self.fp = fp
|
|---|
| 954 | self.read = self.fp.read
|
|---|
| 955 | self.readline = self.fp.readline
|
|---|
| 956 | if hasattr(self.fp, "readlines"): self.readlines = self.fp.readlines
|
|---|
| 957 | if hasattr(self.fp, "fileno"):
|
|---|
| 958 | self.fileno = self.fp.fileno
|
|---|
| 959 | else:
|
|---|
| 960 | self.fileno = lambda: None
|
|---|
| 961 | if hasattr(self.fp, "__iter__"):
|
|---|
| 962 | self.__iter__ = self.fp.__iter__
|
|---|
| 963 | if hasattr(self.fp, "next"):
|
|---|
| 964 | self.next = self.fp.next
|
|---|
| 965 |
|
|---|
| 966 | def __repr__(self):
|
|---|
| 967 | return '<%s at %r whose fp = %r>' % (self.__class__.__name__,
|
|---|
| 968 | id(self), self.fp)
|
|---|
| 969 |
|
|---|
| 970 | def close(self):
|
|---|
| 971 | self.read = None
|
|---|
| 972 | self.readline = None
|
|---|
| 973 | self.readlines = None
|
|---|
| 974 | self.fileno = None
|
|---|
| 975 | if self.fp: self.fp.close()
|
|---|
| 976 | self.fp = None
|
|---|
| 977 |
|
|---|
| 978 | class addclosehook(addbase):
|
|---|
| 979 | """Class to add a close hook to an open file."""
|
|---|
| 980 |
|
|---|
| 981 | def __init__(self, fp, closehook, *hookargs):
|
|---|
| 982 | addbase.__init__(self, fp)
|
|---|
| 983 | self.closehook = closehook
|
|---|
| 984 | self.hookargs = hookargs
|
|---|
| 985 |
|
|---|
| 986 | def close(self):
|
|---|
| 987 | if self.closehook:
|
|---|
| 988 | self.closehook(*self.hookargs)
|
|---|
| 989 | self.closehook = None
|
|---|
| 990 | self.hookargs = None
|
|---|
| 991 | addbase.close(self)
|
|---|
| 992 |
|
|---|
| 993 | class addinfo(addbase):
|
|---|
| 994 | """class to add an info() method to an open file."""
|
|---|
| 995 |
|
|---|
| 996 | def __init__(self, fp, headers):
|
|---|
| 997 | addbase.__init__(self, fp)
|
|---|
| 998 | self.headers = headers
|
|---|
| 999 |
|
|---|
| 1000 | def info(self):
|
|---|
| 1001 | return self.headers
|
|---|
| 1002 |
|
|---|
| 1003 | class addinfourl(addbase):
|
|---|
| 1004 | """class to add info() and geturl() methods to an open file."""
|
|---|
| 1005 |
|
|---|
| 1006 | def __init__(self, fp, headers, url, code=None):
|
|---|
| 1007 | addbase.__init__(self, fp)
|
|---|
| 1008 | self.headers = headers
|
|---|
| 1009 | self.url = url
|
|---|
| 1010 | self.code = code
|
|---|
| 1011 |
|
|---|
| 1012 | def info(self):
|
|---|
| 1013 | return self.headers
|
|---|
| 1014 |
|
|---|
| 1015 | def getcode(self):
|
|---|
| 1016 | return self.code
|
|---|
| 1017 |
|
|---|
| 1018 | def geturl(self):
|
|---|
| 1019 | return self.url
|
|---|
| 1020 |
|
|---|
| 1021 |
|
|---|
| 1022 | # Utilities to parse URLs (most of these return None for missing parts):
|
|---|
| 1023 | # unwrap('<URL:type://host/path>') --> 'type://host/path'
|
|---|
| 1024 | # splittype('type:opaquestring') --> 'type', 'opaquestring'
|
|---|
| 1025 | # splithost('//host[:port]/path') --> 'host[:port]', '/path'
|
|---|
| 1026 | # splituser('user[:passwd]@host[:port]') --> 'user[:passwd]', 'host[:port]'
|
|---|
| 1027 | # splitpasswd('user:passwd') -> 'user', 'passwd'
|
|---|
| 1028 | # splitport('host:port') --> 'host', 'port'
|
|---|
| 1029 | # splitquery('/path?query') --> '/path', 'query'
|
|---|
| 1030 | # splittag('/path#tag') --> '/path', 'tag'
|
|---|
| 1031 | # splitattr('/path;attr1=value1;attr2=value2;...') ->
|
|---|
| 1032 | # '/path', ['attr1=value1', 'attr2=value2', ...]
|
|---|
| 1033 | # splitvalue('attr=value') --> 'attr', 'value'
|
|---|
| 1034 | # unquote('abc%20def') -> 'abc def'
|
|---|
| 1035 | # quote('abc def') -> 'abc%20def')
|
|---|
| 1036 |
|
|---|
| 1037 | try:
|
|---|
| 1038 | unicode
|
|---|
| 1039 | except NameError:
|
|---|
| 1040 | def _is_unicode(x):
|
|---|
| 1041 | return 0
|
|---|
| 1042 | else:
|
|---|
| 1043 | def _is_unicode(x):
|
|---|
| 1044 | return isinstance(x, unicode)
|
|---|
| 1045 |
|
|---|
| 1046 | def toBytes(url):
|
|---|
| 1047 | """toBytes(u"URL") --> 'URL'."""
|
|---|
| 1048 | # Most URL schemes require ASCII. If that changes, the conversion
|
|---|
| 1049 | # can be relaxed
|
|---|
| 1050 | if _is_unicode(url):
|
|---|
| 1051 | try:
|
|---|
| 1052 | url = url.encode("ASCII")
|
|---|
| 1053 | except UnicodeError:
|
|---|
| 1054 | raise UnicodeError("URL " + repr(url) +
|
|---|
| 1055 | " contains non-ASCII characters")
|
|---|
| 1056 | return url
|
|---|
| 1057 |
|
|---|
| 1058 | def unwrap(url):
|
|---|
| 1059 | """unwrap('<URL:type://host/path>') --> 'type://host/path'."""
|
|---|
| 1060 | url = url.strip()
|
|---|
| 1061 | if url[:1] == '<' and url[-1:] == '>':
|
|---|
| 1062 | url = url[1:-1].strip()
|
|---|
| 1063 | if url[:4] == 'URL:': url = url[4:].strip()
|
|---|
| 1064 | return url
|
|---|
| 1065 |
|
|---|
| 1066 | _typeprog = None
|
|---|
| 1067 | def splittype(url):
|
|---|
| 1068 | """splittype('type:opaquestring') --> 'type', 'opaquestring'."""
|
|---|
| 1069 | global _typeprog
|
|---|
| 1070 | if _typeprog is None:
|
|---|
| 1071 | import re
|
|---|
| 1072 | _typeprog = re.compile('^([^/:]+):')
|
|---|
| 1073 |
|
|---|
| 1074 | match = _typeprog.match(url)
|
|---|
| 1075 | if match:
|
|---|
| 1076 | scheme = match.group(1)
|
|---|
| 1077 | return scheme.lower(), url[len(scheme) + 1:]
|
|---|
| 1078 | return None, url
|
|---|
| 1079 |
|
|---|
| 1080 | _hostprog = None
|
|---|
| 1081 | def splithost(url):
|
|---|
| 1082 | """splithost('//host[:port]/path') --> 'host[:port]', '/path'."""
|
|---|
| 1083 | global _hostprog
|
|---|
| 1084 | if _hostprog is None:
|
|---|
| 1085 | import re
|
|---|
| 1086 | _hostprog = re.compile('^//([^/?]*)(.*)$')
|
|---|
| 1087 |
|
|---|
| 1088 | match = _hostprog.match(url)
|
|---|
| 1089 | if match:
|
|---|
| 1090 | host_port = match.group(1)
|
|---|
| 1091 | path = match.group(2)
|
|---|
| 1092 | if path and not path.startswith('/'):
|
|---|
| 1093 | path = '/' + path
|
|---|
| 1094 | return host_port, path
|
|---|
| 1095 | return None, url
|
|---|
| 1096 |
|
|---|
| 1097 | _userprog = None
|
|---|
| 1098 | def splituser(host):
|
|---|
| 1099 | """splituser('user[:passwd]@host[:port]') --> 'user[:passwd]', 'host[:port]'."""
|
|---|
| 1100 | global _userprog
|
|---|
| 1101 | if _userprog is None:
|
|---|
| 1102 | import re
|
|---|
| 1103 | _userprog = re.compile('^(.*)@(.*)$')
|
|---|
| 1104 |
|
|---|
| 1105 | match = _userprog.match(host)
|
|---|
| 1106 | if match: return match.group(1, 2)
|
|---|
| 1107 | return None, host
|
|---|
| 1108 |
|
|---|
| 1109 | _passwdprog = None
|
|---|
| 1110 | def splitpasswd(user):
|
|---|
| 1111 | """splitpasswd('user:passwd') -> 'user', 'passwd'."""
|
|---|
| 1112 | global _passwdprog
|
|---|
| 1113 | if _passwdprog is None:
|
|---|
| 1114 | import re
|
|---|
| 1115 | _passwdprog = re.compile('^([^:]*):(.*)$',re.S)
|
|---|
| 1116 |
|
|---|
| 1117 | match = _passwdprog.match(user)
|
|---|
| 1118 | if match: return match.group(1, 2)
|
|---|
| 1119 | return user, None
|
|---|
| 1120 |
|
|---|
| 1121 | # splittag('/path#tag') --> '/path', 'tag'
|
|---|
| 1122 | _portprog = None
|
|---|
| 1123 | def splitport(host):
|
|---|
| 1124 | """splitport('host:port') --> 'host', 'port'."""
|
|---|
| 1125 | global _portprog
|
|---|
| 1126 | if _portprog is None:
|
|---|
| 1127 | import re
|
|---|
| 1128 | _portprog = re.compile('^(.*):([0-9]+)$')
|
|---|
| 1129 |
|
|---|
| 1130 | match = _portprog.match(host)
|
|---|
| 1131 | if match: return match.group(1, 2)
|
|---|
| 1132 | return host, None
|
|---|
| 1133 |
|
|---|
| 1134 | _nportprog = None
|
|---|
| 1135 | def splitnport(host, defport=-1):
|
|---|
| 1136 | """Split host and port, returning numeric port.
|
|---|
| 1137 | Return given default port if no ':' found; defaults to -1.
|
|---|
| 1138 | Return numerical port if a valid number are found after ':'.
|
|---|
| 1139 | Return None if ':' but not a valid number."""
|
|---|
| 1140 | global _nportprog
|
|---|
| 1141 | if _nportprog is None:
|
|---|
| 1142 | import re
|
|---|
| 1143 | _nportprog = re.compile('^(.*):(.*)$')
|
|---|
| 1144 |
|
|---|
| 1145 | match = _nportprog.match(host)
|
|---|
| 1146 | if match:
|
|---|
| 1147 | host, port = match.group(1, 2)
|
|---|
| 1148 | try:
|
|---|
| 1149 | if not port: raise ValueError, "no digits"
|
|---|
| 1150 | nport = int(port)
|
|---|
| 1151 | except ValueError:
|
|---|
| 1152 | nport = None
|
|---|
| 1153 | return host, nport
|
|---|
| 1154 | return host, defport
|
|---|
| 1155 |
|
|---|
| 1156 | _queryprog = None
|
|---|
| 1157 | def splitquery(url):
|
|---|
| 1158 | """splitquery('/path?query') --> '/path', 'query'."""
|
|---|
| 1159 | global _queryprog
|
|---|
| 1160 | if _queryprog is None:
|
|---|
| 1161 | import re
|
|---|
| 1162 | _queryprog = re.compile('^(.*)\?([^?]*)$')
|
|---|
| 1163 |
|
|---|
| 1164 | match = _queryprog.match(url)
|
|---|
| 1165 | if match: return match.group(1, 2)
|
|---|
| 1166 | return url, None
|
|---|
| 1167 |
|
|---|
| 1168 | _tagprog = None
|
|---|
| 1169 | def splittag(url):
|
|---|
| 1170 | """splittag('/path#tag') --> '/path', 'tag'."""
|
|---|
| 1171 | global _tagprog
|
|---|
| 1172 | if _tagprog is None:
|
|---|
| 1173 | import re
|
|---|
| 1174 | _tagprog = re.compile('^(.*)#([^#]*)$')
|
|---|
| 1175 |
|
|---|
| 1176 | match = _tagprog.match(url)
|
|---|
| 1177 | if match: return match.group(1, 2)
|
|---|
| 1178 | return url, None
|
|---|
| 1179 |
|
|---|
| 1180 | def splitattr(url):
|
|---|
| 1181 | """splitattr('/path;attr1=value1;attr2=value2;...') ->
|
|---|
| 1182 | '/path', ['attr1=value1', 'attr2=value2', ...]."""
|
|---|
| 1183 | words = url.split(';')
|
|---|
| 1184 | return words[0], words[1:]
|
|---|
| 1185 |
|
|---|
| 1186 | _valueprog = None
|
|---|
| 1187 | def splitvalue(attr):
|
|---|
| 1188 | """splitvalue('attr=value') --> 'attr', 'value'."""
|
|---|
| 1189 | global _valueprog
|
|---|
| 1190 | if _valueprog is None:
|
|---|
| 1191 | import re
|
|---|
| 1192 | _valueprog = re.compile('^([^=]*)=(.*)$')
|
|---|
| 1193 |
|
|---|
| 1194 | match = _valueprog.match(attr)
|
|---|
| 1195 | if match: return match.group(1, 2)
|
|---|
| 1196 | return attr, None
|
|---|
| 1197 |
|
|---|
| 1198 | # urlparse contains a duplicate of this method to avoid a circular import. If
|
|---|
| 1199 | # you update this method, also update the copy in urlparse. This code
|
|---|
| 1200 | # duplication does not exist in Python3.
|
|---|
| 1201 |
|
|---|
| 1202 | _hexdig = '0123456789ABCDEFabcdef'
|
|---|
| 1203 | _hextochr = dict((a + b, chr(int(a + b, 16)))
|
|---|
| 1204 | for a in _hexdig for b in _hexdig)
|
|---|
| 1205 | _asciire = re.compile('([\x00-\x7f]+)')
|
|---|
| 1206 |
|
|---|
| 1207 | def unquote(s):
|
|---|
| 1208 | """unquote('abc%20def') -> 'abc def'."""
|
|---|
| 1209 | if _is_unicode(s):
|
|---|
| 1210 | if '%' not in s:
|
|---|
| 1211 | return s
|
|---|
| 1212 | bits = _asciire.split(s)
|
|---|
| 1213 | res = [bits[0]]
|
|---|
| 1214 | append = res.append
|
|---|
| 1215 | for i in range(1, len(bits), 2):
|
|---|
| 1216 | append(unquote(str(bits[i])).decode('latin1'))
|
|---|
| 1217 | append(bits[i + 1])
|
|---|
| 1218 | return ''.join(res)
|
|---|
| 1219 |
|
|---|
| 1220 | bits = s.split('%')
|
|---|
| 1221 | # fastpath
|
|---|
| 1222 | if len(bits) == 1:
|
|---|
| 1223 | return s
|
|---|
| 1224 | res = [bits[0]]
|
|---|
| 1225 | append = res.append
|
|---|
| 1226 | for item in bits[1:]:
|
|---|
| 1227 | try:
|
|---|
| 1228 | append(_hextochr[item[:2]])
|
|---|
| 1229 | append(item[2:])
|
|---|
| 1230 | except KeyError:
|
|---|
| 1231 | append('%')
|
|---|
| 1232 | append(item)
|
|---|
| 1233 | return ''.join(res)
|
|---|
| 1234 |
|
|---|
| 1235 | def unquote_plus(s):
|
|---|
| 1236 | """unquote('%7e/abc+def') -> '~/abc def'"""
|
|---|
| 1237 | s = s.replace('+', ' ')
|
|---|
| 1238 | return unquote(s)
|
|---|
| 1239 |
|
|---|
| 1240 | always_safe = ('ABCDEFGHIJKLMNOPQRSTUVWXYZ'
|
|---|
| 1241 | 'abcdefghijklmnopqrstuvwxyz'
|
|---|
| 1242 | '0123456789' '_.-')
|
|---|
| 1243 | _safe_map = {}
|
|---|
| 1244 | for i, c in zip(xrange(256), str(bytearray(xrange(256)))):
|
|---|
| 1245 | _safe_map[c] = c if (i < 128 and c in always_safe) else '%{:02X}'.format(i)
|
|---|
| 1246 | _safe_quoters = {}
|
|---|
| 1247 |
|
|---|
| 1248 | def quote(s, safe='/'):
|
|---|
| 1249 | """quote('abc def') -> 'abc%20def'
|
|---|
| 1250 |
|
|---|
| 1251 | Each part of a URL, e.g. the path info, the query, etc., has a
|
|---|
| 1252 | different set of reserved characters that must be quoted.
|
|---|
| 1253 |
|
|---|
| 1254 | RFC 2396 Uniform Resource Identifiers (URI): Generic Syntax lists
|
|---|
| 1255 | the following reserved characters.
|
|---|
| 1256 |
|
|---|
| 1257 | reserved = ";" | "/" | "?" | ":" | "@" | "&" | "=" | "+" |
|
|---|
| 1258 | "$" | ","
|
|---|
| 1259 |
|
|---|
| 1260 | Each of these characters is reserved in some component of a URL,
|
|---|
| 1261 | but not necessarily in all of them.
|
|---|
| 1262 |
|
|---|
| 1263 | By default, the quote function is intended for quoting the path
|
|---|
| 1264 | section of a URL. Thus, it will not encode '/'. This character
|
|---|
| 1265 | is reserved, but in typical usage the quote function is being
|
|---|
| 1266 | called on a path where the existing slash characters are used as
|
|---|
| 1267 | reserved characters.
|
|---|
| 1268 | """
|
|---|
| 1269 | # fastpath
|
|---|
| 1270 | if not s:
|
|---|
| 1271 | if s is None:
|
|---|
| 1272 | raise TypeError('None object cannot be quoted')
|
|---|
| 1273 | return s
|
|---|
| 1274 | cachekey = (safe, always_safe)
|
|---|
| 1275 | try:
|
|---|
| 1276 | (quoter, safe) = _safe_quoters[cachekey]
|
|---|
| 1277 | except KeyError:
|
|---|
| 1278 | safe_map = _safe_map.copy()
|
|---|
| 1279 | safe_map.update([(c, c) for c in safe])
|
|---|
| 1280 | quoter = safe_map.__getitem__
|
|---|
| 1281 | safe = always_safe + safe
|
|---|
| 1282 | _safe_quoters[cachekey] = (quoter, safe)
|
|---|
| 1283 | if not s.rstrip(safe):
|
|---|
| 1284 | return s
|
|---|
| 1285 | return ''.join(map(quoter, s))
|
|---|
| 1286 |
|
|---|
| 1287 | def quote_plus(s, safe=''):
|
|---|
| 1288 | """Quote the query fragment of a URL; replacing ' ' with '+'"""
|
|---|
| 1289 | if ' ' in s:
|
|---|
| 1290 | s = quote(s, safe + ' ')
|
|---|
| 1291 | return s.replace(' ', '+')
|
|---|
| 1292 | return quote(s, safe)
|
|---|
| 1293 |
|
|---|
| 1294 | def urlencode(query, doseq=0):
|
|---|
| 1295 | """Encode a sequence of two-element tuples or dictionary into a URL query string.
|
|---|
| 1296 |
|
|---|
| 1297 | If any values in the query arg are sequences and doseq is true, each
|
|---|
| 1298 | sequence element is converted to a separate parameter.
|
|---|
| 1299 |
|
|---|
| 1300 | If the query arg is a sequence of two-element tuples, the order of the
|
|---|
| 1301 | parameters in the output will match the order of parameters in the
|
|---|
| 1302 | input.
|
|---|
| 1303 | """
|
|---|
| 1304 |
|
|---|
| 1305 | if hasattr(query,"items"):
|
|---|
| 1306 | # mapping objects
|
|---|
| 1307 | query = query.items()
|
|---|
| 1308 | else:
|
|---|
| 1309 | # it's a bother at times that strings and string-like objects are
|
|---|
| 1310 | # sequences...
|
|---|
| 1311 | try:
|
|---|
| 1312 | # non-sequence items should not work with len()
|
|---|
| 1313 | # non-empty strings will fail this
|
|---|
| 1314 | if len(query) and not isinstance(query[0], tuple):
|
|---|
| 1315 | raise TypeError
|
|---|
| 1316 | # zero-length sequences of all types will get here and succeed,
|
|---|
| 1317 | # but that's a minor nit - since the original implementation
|
|---|
| 1318 | # allowed empty dicts that type of behavior probably should be
|
|---|
| 1319 | # preserved for consistency
|
|---|
| 1320 | except TypeError:
|
|---|
| 1321 | ty,va,tb = sys.exc_info()
|
|---|
| 1322 | raise TypeError, "not a valid non-string sequence or mapping object", tb
|
|---|
| 1323 |
|
|---|
| 1324 | l = []
|
|---|
| 1325 | if not doseq:
|
|---|
| 1326 | # preserve old behavior
|
|---|
| 1327 | for k, v in query:
|
|---|
| 1328 | k = quote_plus(str(k))
|
|---|
| 1329 | v = quote_plus(str(v))
|
|---|
| 1330 | l.append(k + '=' + v)
|
|---|
| 1331 | else:
|
|---|
| 1332 | for k, v in query:
|
|---|
| 1333 | k = quote_plus(str(k))
|
|---|
| 1334 | if isinstance(v, str):
|
|---|
| 1335 | v = quote_plus(v)
|
|---|
| 1336 | l.append(k + '=' + v)
|
|---|
| 1337 | elif _is_unicode(v):
|
|---|
| 1338 | # is there a reasonable way to convert to ASCII?
|
|---|
| 1339 | # encode generates a string, but "replace" or "ignore"
|
|---|
| 1340 | # lose information and "strict" can raise UnicodeError
|
|---|
| 1341 | v = quote_plus(v.encode("ASCII","replace"))
|
|---|
| 1342 | l.append(k + '=' + v)
|
|---|
| 1343 | else:
|
|---|
| 1344 | try:
|
|---|
| 1345 | # is this a sufficient test for sequence-ness?
|
|---|
| 1346 | len(v)
|
|---|
| 1347 | except TypeError:
|
|---|
| 1348 | # not a sequence
|
|---|
| 1349 | v = quote_plus(str(v))
|
|---|
| 1350 | l.append(k + '=' + v)
|
|---|
| 1351 | else:
|
|---|
| 1352 | # loop over the sequence
|
|---|
| 1353 | for elt in v:
|
|---|
| 1354 | l.append(k + '=' + quote_plus(str(elt)))
|
|---|
| 1355 | return '&'.join(l)
|
|---|
| 1356 |
|
|---|
| 1357 | # Proxy handling
|
|---|
| 1358 | def getproxies_environment():
|
|---|
| 1359 | """Return a dictionary of scheme -> proxy server URL mappings.
|
|---|
| 1360 |
|
|---|
| 1361 | Scan the environment for variables named <scheme>_proxy;
|
|---|
| 1362 | this seems to be the standard convention. If you need a
|
|---|
| 1363 | different way, you can pass a proxies dictionary to the
|
|---|
| 1364 | [Fancy]URLopener constructor.
|
|---|
| 1365 |
|
|---|
| 1366 | """
|
|---|
| 1367 | proxies = {}
|
|---|
| 1368 | for name, value in os.environ.items():
|
|---|
| 1369 | name = name.lower()
|
|---|
| 1370 | if value and name[-6:] == '_proxy':
|
|---|
| 1371 | proxies[name[:-6]] = value
|
|---|
| 1372 | return proxies
|
|---|
| 1373 |
|
|---|
| 1374 | def proxy_bypass_environment(host):
|
|---|
| 1375 | """Test if proxies should not be used for a particular host.
|
|---|
| 1376 |
|
|---|
| 1377 | Checks the environment for a variable named no_proxy, which should
|
|---|
| 1378 | be a list of DNS suffixes separated by commas, or '*' for all hosts.
|
|---|
| 1379 | """
|
|---|
| 1380 | no_proxy = os.environ.get('no_proxy', '') or os.environ.get('NO_PROXY', '')
|
|---|
| 1381 | # '*' is special case for always bypass
|
|---|
| 1382 | if no_proxy == '*':
|
|---|
| 1383 | return 1
|
|---|
| 1384 | # strip port off host
|
|---|
| 1385 | hostonly, port = splitport(host)
|
|---|
| 1386 | # check if the host ends with any of the DNS suffixes
|
|---|
| 1387 | no_proxy_list = [proxy.strip() for proxy in no_proxy.split(',')]
|
|---|
| 1388 | for name in no_proxy_list:
|
|---|
| 1389 | if name and (hostonly.endswith(name) or host.endswith(name)):
|
|---|
| 1390 | return 1
|
|---|
| 1391 | # otherwise, don't bypass
|
|---|
| 1392 | return 0
|
|---|
| 1393 |
|
|---|
| 1394 |
|
|---|
| 1395 | if sys.platform == 'darwin':
|
|---|
| 1396 | from _scproxy import _get_proxy_settings, _get_proxies
|
|---|
| 1397 |
|
|---|
| 1398 | def proxy_bypass_macosx_sysconf(host):
|
|---|
| 1399 | """
|
|---|
| 1400 | Return True iff this host shouldn't be accessed using a proxy
|
|---|
| 1401 |
|
|---|
| 1402 | This function uses the MacOSX framework SystemConfiguration
|
|---|
| 1403 | to fetch the proxy information.
|
|---|
| 1404 | """
|
|---|
| 1405 | import re
|
|---|
| 1406 | import socket
|
|---|
| 1407 | from fnmatch import fnmatch
|
|---|
| 1408 |
|
|---|
| 1409 | hostonly, port = splitport(host)
|
|---|
| 1410 |
|
|---|
| 1411 | def ip2num(ipAddr):
|
|---|
| 1412 | parts = ipAddr.split('.')
|
|---|
| 1413 | parts = map(int, parts)
|
|---|
| 1414 | if len(parts) != 4:
|
|---|
| 1415 | parts = (parts + [0, 0, 0, 0])[:4]
|
|---|
| 1416 | return (parts[0] << 24) | (parts[1] << 16) | (parts[2] << 8) | parts[3]
|
|---|
| 1417 |
|
|---|
| 1418 | proxy_settings = _get_proxy_settings()
|
|---|
| 1419 |
|
|---|
| 1420 | # Check for simple host names:
|
|---|
| 1421 | if '.' not in host:
|
|---|
| 1422 | if proxy_settings['exclude_simple']:
|
|---|
| 1423 | return True
|
|---|
| 1424 |
|
|---|
| 1425 | hostIP = None
|
|---|
| 1426 |
|
|---|
| 1427 | for value in proxy_settings.get('exceptions', ()):
|
|---|
| 1428 | # Items in the list are strings like these: *.local, 169.254/16
|
|---|
| 1429 | if not value: continue
|
|---|
| 1430 |
|
|---|
| 1431 | m = re.match(r"(\d+(?:\.\d+)*)(/\d+)?", value)
|
|---|
| 1432 | if m is not None:
|
|---|
| 1433 | if hostIP is None:
|
|---|
| 1434 | try:
|
|---|
| 1435 | hostIP = socket.gethostbyname(hostonly)
|
|---|
| 1436 | hostIP = ip2num(hostIP)
|
|---|
| 1437 | except socket.error:
|
|---|
| 1438 | continue
|
|---|
| 1439 |
|
|---|
| 1440 | base = ip2num(m.group(1))
|
|---|
| 1441 | mask = m.group(2)
|
|---|
| 1442 | if mask is None:
|
|---|
| 1443 | mask = 8 * (m.group(1).count('.') + 1)
|
|---|
| 1444 |
|
|---|
| 1445 | else:
|
|---|
| 1446 | mask = int(mask[1:])
|
|---|
| 1447 | mask = 32 - mask
|
|---|
| 1448 |
|
|---|
| 1449 | if (hostIP >> mask) == (base >> mask):
|
|---|
| 1450 | return True
|
|---|
| 1451 |
|
|---|
| 1452 | elif fnmatch(host, value):
|
|---|
| 1453 | return True
|
|---|
| 1454 |
|
|---|
| 1455 | return False
|
|---|
| 1456 |
|
|---|
| 1457 | def getproxies_macosx_sysconf():
|
|---|
| 1458 | """Return a dictionary of scheme -> proxy server URL mappings.
|
|---|
| 1459 |
|
|---|
| 1460 | This function uses the MacOSX framework SystemConfiguration
|
|---|
| 1461 | to fetch the proxy information.
|
|---|
| 1462 | """
|
|---|
| 1463 | return _get_proxies()
|
|---|
| 1464 |
|
|---|
| 1465 | def proxy_bypass(host):
|
|---|
| 1466 | if getproxies_environment():
|
|---|
| 1467 | return proxy_bypass_environment(host)
|
|---|
| 1468 | else:
|
|---|
| 1469 | return proxy_bypass_macosx_sysconf(host)
|
|---|
| 1470 |
|
|---|
| 1471 | def getproxies():
|
|---|
| 1472 | return getproxies_environment() or getproxies_macosx_sysconf()
|
|---|
| 1473 |
|
|---|
| 1474 | elif os.name == 'nt':
|
|---|
| 1475 | def getproxies_registry():
|
|---|
| 1476 | """Return a dictionary of scheme -> proxy server URL mappings.
|
|---|
| 1477 |
|
|---|
| 1478 | Win32 uses the registry to store proxies.
|
|---|
| 1479 |
|
|---|
| 1480 | """
|
|---|
| 1481 | proxies = {}
|
|---|
| 1482 | try:
|
|---|
| 1483 | import _winreg
|
|---|
| 1484 | except ImportError:
|
|---|
| 1485 | # Std module, so should be around - but you never know!
|
|---|
| 1486 | return proxies
|
|---|
| 1487 | try:
|
|---|
| 1488 | internetSettings = _winreg.OpenKey(_winreg.HKEY_CURRENT_USER,
|
|---|
| 1489 | r'Software\Microsoft\Windows\CurrentVersion\Internet Settings')
|
|---|
| 1490 | proxyEnable = _winreg.QueryValueEx(internetSettings,
|
|---|
| 1491 | 'ProxyEnable')[0]
|
|---|
| 1492 | if proxyEnable:
|
|---|
| 1493 | # Returned as Unicode but problems if not converted to ASCII
|
|---|
| 1494 | proxyServer = str(_winreg.QueryValueEx(internetSettings,
|
|---|
| 1495 | 'ProxyServer')[0])
|
|---|
| 1496 | if '=' in proxyServer:
|
|---|
| 1497 | # Per-protocol settings
|
|---|
| 1498 | for p in proxyServer.split(';'):
|
|---|
| 1499 | protocol, address = p.split('=', 1)
|
|---|
| 1500 | # See if address has a type:// prefix
|
|---|
| 1501 | import re
|
|---|
| 1502 | if not re.match('^([^/:]+)://', address):
|
|---|
| 1503 | address = '%s://%s' % (protocol, address)
|
|---|
| 1504 | proxies[protocol] = address
|
|---|
| 1505 | else:
|
|---|
| 1506 | # Use one setting for all protocols
|
|---|
| 1507 | if proxyServer[:5] == 'http:':
|
|---|
| 1508 | proxies['http'] = proxyServer
|
|---|
| 1509 | else:
|
|---|
| 1510 | proxies['http'] = 'http://%s' % proxyServer
|
|---|
| 1511 | proxies['https'] = 'https://%s' % proxyServer
|
|---|
| 1512 | proxies['ftp'] = 'ftp://%s' % proxyServer
|
|---|
| 1513 | internetSettings.Close()
|
|---|
| 1514 | except (WindowsError, ValueError, TypeError):
|
|---|
| 1515 | # Either registry key not found etc, or the value in an
|
|---|
| 1516 | # unexpected format.
|
|---|
| 1517 | # proxies already set up to be empty so nothing to do
|
|---|
| 1518 | pass
|
|---|
| 1519 | return proxies
|
|---|
| 1520 |
|
|---|
| 1521 | def getproxies():
|
|---|
| 1522 | """Return a dictionary of scheme -> proxy server URL mappings.
|
|---|
| 1523 |
|
|---|
| 1524 | Returns settings gathered from the environment, if specified,
|
|---|
| 1525 | or the registry.
|
|---|
| 1526 |
|
|---|
| 1527 | """
|
|---|
| 1528 | return getproxies_environment() or getproxies_registry()
|
|---|
| 1529 |
|
|---|
| 1530 | def proxy_bypass_registry(host):
|
|---|
| 1531 | try:
|
|---|
| 1532 | import _winreg
|
|---|
| 1533 | import re
|
|---|
| 1534 | except ImportError:
|
|---|
| 1535 | # Std modules, so should be around - but you never know!
|
|---|
| 1536 | return 0
|
|---|
| 1537 | try:
|
|---|
| 1538 | internetSettings = _winreg.OpenKey(_winreg.HKEY_CURRENT_USER,
|
|---|
| 1539 | r'Software\Microsoft\Windows\CurrentVersion\Internet Settings')
|
|---|
| 1540 | proxyEnable = _winreg.QueryValueEx(internetSettings,
|
|---|
| 1541 | 'ProxyEnable')[0]
|
|---|
| 1542 | proxyOverride = str(_winreg.QueryValueEx(internetSettings,
|
|---|
| 1543 | 'ProxyOverride')[0])
|
|---|
| 1544 | # ^^^^ Returned as Unicode but problems if not converted to ASCII
|
|---|
| 1545 | except WindowsError:
|
|---|
| 1546 | return 0
|
|---|
| 1547 | if not proxyEnable or not proxyOverride:
|
|---|
| 1548 | return 0
|
|---|
| 1549 | # try to make a host list from name and IP address.
|
|---|
| 1550 | rawHost, port = splitport(host)
|
|---|
| 1551 | host = [rawHost]
|
|---|
| 1552 | try:
|
|---|
| 1553 | addr = socket.gethostbyname(rawHost)
|
|---|
| 1554 | if addr != rawHost:
|
|---|
| 1555 | host.append(addr)
|
|---|
| 1556 | except socket.error:
|
|---|
| 1557 | pass
|
|---|
| 1558 | try:
|
|---|
| 1559 | fqdn = socket.getfqdn(rawHost)
|
|---|
| 1560 | if fqdn != rawHost:
|
|---|
| 1561 | host.append(fqdn)
|
|---|
| 1562 | except socket.error:
|
|---|
| 1563 | pass
|
|---|
| 1564 | # make a check value list from the registry entry: replace the
|
|---|
| 1565 | # '<local>' string by the localhost entry and the corresponding
|
|---|
| 1566 | # canonical entry.
|
|---|
| 1567 | proxyOverride = proxyOverride.split(';')
|
|---|
| 1568 | # now check if we match one of the registry values.
|
|---|
| 1569 | for test in proxyOverride:
|
|---|
| 1570 | if test == '<local>':
|
|---|
| 1571 | if '.' not in rawHost:
|
|---|
| 1572 | return 1
|
|---|
| 1573 | test = test.replace(".", r"\.") # mask dots
|
|---|
| 1574 | test = test.replace("*", r".*") # change glob sequence
|
|---|
| 1575 | test = test.replace("?", r".") # change glob char
|
|---|
| 1576 | for val in host:
|
|---|
| 1577 | # print "%s <--> %s" %( test, val )
|
|---|
| 1578 | if re.match(test, val, re.I):
|
|---|
| 1579 | return 1
|
|---|
| 1580 | return 0
|
|---|
| 1581 |
|
|---|
| 1582 | def proxy_bypass(host):
|
|---|
| 1583 | """Return a dictionary of scheme -> proxy server URL mappings.
|
|---|
| 1584 |
|
|---|
| 1585 | Returns settings gathered from the environment, if specified,
|
|---|
| 1586 | or the registry.
|
|---|
| 1587 |
|
|---|
| 1588 | """
|
|---|
| 1589 | if getproxies_environment():
|
|---|
| 1590 | return proxy_bypass_environment(host)
|
|---|
| 1591 | else:
|
|---|
| 1592 | return proxy_bypass_registry(host)
|
|---|
| 1593 |
|
|---|
| 1594 | else:
|
|---|
| 1595 | # By default use environment variables
|
|---|
| 1596 | getproxies = getproxies_environment
|
|---|
| 1597 | proxy_bypass = proxy_bypass_environment
|
|---|
| 1598 |
|
|---|
| 1599 | # Test and time quote() and unquote()
|
|---|
| 1600 | def test1():
|
|---|
| 1601 | s = ''
|
|---|
| 1602 | for i in range(256): s = s + chr(i)
|
|---|
| 1603 | s = s*4
|
|---|
| 1604 | t0 = time.time()
|
|---|
| 1605 | qs = quote(s)
|
|---|
| 1606 | uqs = unquote(qs)
|
|---|
| 1607 | t1 = time.time()
|
|---|
| 1608 | if uqs != s:
|
|---|
| 1609 | print 'Wrong!'
|
|---|
| 1610 | print repr(s)
|
|---|
| 1611 | print repr(qs)
|
|---|
| 1612 | print repr(uqs)
|
|---|
| 1613 | print round(t1 - t0, 3), 'sec'
|
|---|
| 1614 |
|
|---|
| 1615 |
|
|---|
| 1616 | def reporthook(blocknum, blocksize, totalsize):
|
|---|
| 1617 | # Report during remote transfers
|
|---|
| 1618 | print "Block number: %d, Block size: %d, Total size: %d" % (
|
|---|
| 1619 | blocknum, blocksize, totalsize)
|
|---|
