| 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 | from urlparse import urljoin as basejoin
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| 31 |
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| 32 | __all__ = ["urlopen", "URLopener", "FancyURLopener", "urlretrieve",
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| 33 | "urlcleanup", "quote", "quote_plus", "unquote", "unquote_plus",
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| 34 | "urlencode", "url2pathname", "pathname2url", "splittag",
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| 35 | "localhost", "thishost", "ftperrors", "basejoin", "unwrap",
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| 36 | "splittype", "splithost", "splituser", "splitpasswd", "splitport",
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| 37 | "splitnport", "splitquery", "splitattr", "splitvalue",
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| 38 | "getproxies"]
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| 39 |
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| 40 | __version__ = '1.17' # XXX This version is not always updated :-(
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| 41 |
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| 42 | MAXFTPCACHE = 10 # Trim the ftp cache beyond this size
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| 43 |
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| 44 | # Helper for non-unix systems
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| 45 | if os.name == 'mac':
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| 46 | from macurl2path import url2pathname, pathname2url
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| 47 | elif os.name == 'nt':
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| 48 | from nturl2path import url2pathname, pathname2url
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| 49 | elif os.name == 'riscos':
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| 50 | from rourl2path import url2pathname, pathname2url
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| 51 | else:
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| 52 | def url2pathname(pathname):
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| 53 | """OS-specific conversion from a relative URL of the 'file' scheme
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| 54 | to a file system path; not recommended for general use."""
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| 55 | return unquote(pathname)
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| 56 |
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| 57 | def pathname2url(pathname):
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| 58 | """OS-specific conversion from a file system path to a relative URL
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| 59 | of the 'file' scheme; not recommended for general use."""
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| 60 | return quote(pathname)
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| 61 |
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| 62 | # This really consists of two pieces:
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| 63 | # (1) a class which handles opening of all sorts of URLs
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| 64 | # (plus assorted utilities etc.)
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| 65 | # (2) a set of functions for parsing URLs
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| 66 | # XXX Should these be separated out into different modules?
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| 67 |
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| 68 |
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| 69 | # Shortcut for basic usage
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| 70 | _urlopener = None
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| 71 | def urlopen(url, data=None, proxies=None):
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| 72 | """Create a file-like object for the specified URL to read from."""
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| 73 | from warnings import warnpy3k
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| 74 | warnpy3k("urllib.urlopen() has been removed in Python 3.0 in "
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| 75 | "favor of urllib2.urlopen()", stacklevel=2)
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| 76 |
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| 77 | global _urlopener
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| 78 | if proxies is not None:
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| 79 | opener = FancyURLopener(proxies=proxies)
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| 80 | elif not _urlopener:
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| 81 | opener = FancyURLopener()
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| 82 | _urlopener = opener
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| 83 | else:
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| 84 | opener = _urlopener
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| 85 | if data is None:
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| 86 | return opener.open(url)
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| 87 | else:
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| 88 | return opener.open(url, data)
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| 89 | def urlretrieve(url, filename=None, reporthook=None, data=None):
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| 90 | global _urlopener
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| 91 | if not _urlopener:
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| 92 | _urlopener = FancyURLopener()
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| 93 | return _urlopener.retrieve(url, filename, reporthook, data)
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| 94 | def urlcleanup():
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| 95 | if _urlopener:
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| 96 | _urlopener.cleanup()
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| 97 |
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| 98 | # check for SSL
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| 99 | try:
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| 100 | import ssl
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| 101 | except:
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| 102 | _have_ssl = False
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| 103 | else:
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| 104 | _have_ssl = True
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| 105 |
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| 106 | # exception raised when downloaded size does not match content-length
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| 107 | class ContentTooShortError(IOError):
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| 108 | def __init__(self, message, content):
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| 109 | IOError.__init__(self, message)
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| 110 | self.content = content
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| 111 |
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| 112 | ftpcache = {}
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| 113 | class URLopener:
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| 114 | """Class to open URLs.
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| 115 | This is a class rather than just a subroutine because we may need
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| 116 | more than one set of global protocol-specific options.
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| 117 | Note -- this is a base class for those who don't want the
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| 118 | automatic handling of errors type 302 (relocated) and 401
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| 119 | (authorization needed)."""
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| 120 |
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| 121 | __tempfiles = None
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| 122 |
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| 123 | version = "Python-urllib/%s" % __version__
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| 124 |
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| 125 | # Constructor
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| 126 | def __init__(self, proxies=None, **x509):
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| 127 | if proxies is None:
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| 128 | proxies = getproxies()
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| 129 | assert hasattr(proxies, 'has_key'), "proxies must be a mapping"
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| 130 | self.proxies = proxies
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| 131 | self.key_file = x509.get('key_file')
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| 132 | self.cert_file = x509.get('cert_file')
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| 133 | self.addheaders = [('User-Agent', self.version)]
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| 134 | self.__tempfiles = []
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| 135 | self.__unlink = os.unlink # See cleanup()
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| 136 | self.tempcache = None
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| 137 | # Undocumented feature: if you assign {} to tempcache,
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| 138 | # it is used to cache files retrieved with
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| 139 | # self.retrieve(). This is not enabled by default
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| 140 | # since it does not work for changing documents (and I
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| 141 | # haven't got the logic to check expiration headers
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| 142 | # yet).
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| 143 | self.ftpcache = ftpcache
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| 144 | # Undocumented feature: you can use a different
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| 145 | # ftp cache by assigning to the .ftpcache member;
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| 146 | # in case you want logically independent URL openers
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| 147 | # XXX This is not threadsafe. Bah.
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| 148 |
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| 149 | def __del__(self):
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| 150 | self.close()
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| 151 |
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| 152 | def close(self):
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| 153 | self.cleanup()
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| 154 |
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| 155 | def cleanup(self):
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| 156 | # This code sometimes runs when the rest of this module
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| 157 | # has already been deleted, so it can't use any globals
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| 158 | # or import anything.
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| 159 | if self.__tempfiles:
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| 160 | for file in self.__tempfiles:
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| 161 | try:
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| 162 | self.__unlink(file)
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| 163 | except OSError:
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| 164 | pass
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| 165 | del self.__tempfiles[:]
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| 166 | if self.tempcache:
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| 167 | self.tempcache.clear()
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| 168 |
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| 169 | def addheader(self, *args):
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| 170 | """Add a header to be used by the HTTP interface only
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| 171 | e.g. u.addheader('Accept', 'sound/basic')"""
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| 172 | self.addheaders.append(args)
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| 173 |
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| 174 | # External interface
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| 175 | def open(self, fullurl, data=None):
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| 176 | """Use URLopener().open(file) instead of open(file, 'r')."""
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| 177 | fullurl = unwrap(toBytes(fullurl))
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| 178 | # percent encode url. fixing lame server errors like space within url
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| 179 | # parts
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| 180 | fullurl = quote(fullurl, safe="%/:=&?~#+!$,;'@()*[]|")
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| 181 | if self.tempcache and fullurl in self.tempcache:
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| 182 | filename, headers = self.tempcache[fullurl]
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| 183 | fp = open(filename, 'rb')
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| 184 | return addinfourl(fp, headers, fullurl)
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| 185 | urltype, url = splittype(fullurl)
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| 186 | if not urltype:
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| 187 | urltype = 'file'
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| 188 | if urltype in self.proxies:
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| 189 | proxy = self.proxies[urltype]
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| 190 | urltype, proxyhost = splittype(proxy)
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| 191 | host, selector = splithost(proxyhost)
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| 192 | url = (host, fullurl) # Signal special case to open_*()
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| 193 | else:
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| 194 | proxy = None
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| 195 | name = 'open_' + urltype
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| 196 | self.type = urltype
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| 197 | name = name.replace('-', '_')
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| 198 | if not hasattr(self, name):
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| 199 | if proxy:
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| 200 | return self.open_unknown_proxy(proxy, fullurl, data)
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| 201 | else:
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| 202 | return self.open_unknown(fullurl, data)
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| 203 | try:
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| 204 | if data is None:
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| 205 | return getattr(self, name)(url)
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| 206 | else:
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| 207 | return getattr(self, name)(url, data)
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| 208 | except socket.error, msg:
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| 209 | raise IOError, ('socket error', msg), sys.exc_info()[2]
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| 210 |
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| 211 | def open_unknown(self, fullurl, data=None):
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| 212 | """Overridable interface to open unknown URL type."""
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| 213 | type, url = splittype(fullurl)
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| 214 | raise IOError, ('url error', 'unknown url type', type)
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| 215 |
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| 216 | def open_unknown_proxy(self, proxy, fullurl, data=None):
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| 217 | """Overridable interface to open unknown URL type."""
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| 218 | type, url = splittype(fullurl)
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| 219 | raise IOError, ('url error', 'invalid proxy for %s' % type, proxy)
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| 220 |
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| 221 | # External interface
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| 222 | def retrieve(self, url, filename=None, reporthook=None, data=None):
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| 223 | """retrieve(url) returns (filename, headers) for a local object
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| 224 | or (tempfilename, headers) for a remote object."""
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| 225 | url = unwrap(toBytes(url))
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| 226 | if self.tempcache and url in self.tempcache:
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| 227 | return self.tempcache[url]
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| 228 | type, url1 = splittype(url)
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| 229 | if filename is None and (not type or type == 'file'):
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| 230 | try:
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| 231 | fp = self.open_local_file(url1)
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| 232 | hdrs = fp.info()
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| 233 | del fp
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| 234 | return url2pathname(splithost(url1)[1]), hdrs
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| 235 | except IOError, msg:
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| 236 | pass
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| 237 | fp = self.open(url, data)
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| 238 | try:
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| 239 | headers = fp.info()
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| 240 | if filename:
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| 241 | tfp = open(filename, 'wb')
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| 242 | else:
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| 243 | import tempfile
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| 244 | garbage, path = splittype(url)
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| 245 | garbage, path = splithost(path or "")
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| 246 | path, garbage = splitquery(path or "")
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| 247 | path, garbage = splitattr(path or "")
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| 248 | suffix = os.path.splitext(path)[1]
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| 249 | (fd, filename) = tempfile.mkstemp(suffix)
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| 250 | self.__tempfiles.append(filename)
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| 251 | tfp = os.fdopen(fd, 'wb')
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| 252 | try:
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| 253 | result = filename, headers
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| 254 | if self.tempcache is not None:
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| 255 | self.tempcache[url] = result
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| 256 | bs = 1024*8
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| 257 | size = -1
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| 258 | read = 0
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| 259 | blocknum = 0
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| 260 | if reporthook:
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| 261 | if "content-length" in headers:
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| 262 | size = int(headers["Content-Length"])
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| 263 | reporthook(blocknum, bs, size)
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| 264 | while 1:
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| 265 | block = fp.read(bs)
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| 266 | if block == "":
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| 267 | break
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| 268 | read += len(block)
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| 269 | tfp.write(block)
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| 270 | blocknum += 1
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| 271 | if reporthook:
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| 272 | reporthook(blocknum, bs, size)
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| 273 | finally:
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| 274 | tfp.close()
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| 275 | finally:
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| 276 | fp.close()
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| 277 | del fp
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| 278 | del tfp
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| 279 |
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| 280 | # raise exception if actual size does not match content-length header
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| 281 | if size >= 0 and read < size:
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| 282 | raise ContentTooShortError("retrieval incomplete: got only %i out "
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| 283 | "of %i bytes" % (read, size), result)
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| 284 |
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| 285 | return result
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| 286 |
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| 287 | # Each method named open_<type> knows how to open that type of URL
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| 288 |
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| 289 | def open_http(self, url, data=None):
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| 290 | """Use HTTP protocol."""
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| 291 | import httplib
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| 292 | user_passwd = None
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| 293 | proxy_passwd= None
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| 294 | if isinstance(url, str):
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| 295 | host, selector = splithost(url)
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| 296 | if host:
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| 297 | user_passwd, host = splituser(host)
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| 298 | host = unquote(host)
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| 299 | realhost = host
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| 300 | else:
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| 301 | host, selector = url
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| 302 | # check whether the proxy contains authorization information
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| 303 | proxy_passwd, host = splituser(host)
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| 304 | # now we proceed with the url we want to obtain
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| 305 | urltype, rest = splittype(selector)
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| 306 | url = rest
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| 307 | user_passwd = None
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| 308 | if urltype.lower() != 'http':
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| 309 | realhost = None
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| 310 | else:
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| 311 | realhost, rest = splithost(rest)
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| 312 | if realhost:
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| 313 | user_passwd, realhost = splituser(realhost)
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| 314 | if user_passwd:
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| 315 | selector = "%s://%s%s" % (urltype, realhost, rest)
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| 316 | if proxy_bypass(realhost):
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| 317 | host = realhost
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| 318 |
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| 319 | #print "proxy via http:", host, selector
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| 320 | if not host: raise IOError, ('http error', 'no host given')
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| 321 |
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| 322 | if proxy_passwd:
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| 323 | import base64
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| 324 | proxy_auth = base64.b64encode(proxy_passwd).strip()
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| 325 | else:
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| 326 | proxy_auth = None
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| 327 |
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| 328 | if user_passwd:
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| 329 | import base64
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| 330 | auth = base64.b64encode(user_passwd).strip()
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| 331 | else:
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| 332 | auth = None
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| 333 | h = httplib.HTTP(host)
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| 334 | if data is not None:
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| 335 | h.putrequest('POST', selector)
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| 336 | h.putheader('Content-Type', 'application/x-www-form-urlencoded')
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| 337 | h.putheader('Content-Length', '%d' % len(data))
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| 338 | else:
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| 339 | h.putrequest('GET', selector)
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| 340 | if proxy_auth: h.putheader('Proxy-Authorization', 'Basic %s' % proxy_auth)
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| 341 | if auth: h.putheader('Authorization', 'Basic %s' % auth)
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| 342 | if realhost: h.putheader('Host', realhost)
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| 343 | for args in self.addheaders: h.putheader(*args)
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| 344 | h.endheaders()
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| 345 | if data is not None:
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| 346 | h.send(data)
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| 347 | errcode, errmsg, headers = h.getreply()
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| 348 | fp = h.getfile()
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| 349 | if errcode == -1:
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| 350 | if fp: fp.close()
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| 351 | # something went wrong with the HTTP status line
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| 352 | raise IOError, ('http protocol error', 0,
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| 353 | 'got a bad status line', None)
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| 354 | # According to RFC 2616, "2xx" code indicates that the client's
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| 355 | # request was successfully received, understood, and accepted.
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| 356 | if (200 <= errcode < 300):
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| 357 | return addinfourl(fp, headers, "http:" + url, errcode)
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| 358 | else:
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| 359 | if data is None:
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| 360 | return self.http_error(url, fp, errcode, errmsg, headers)
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| 361 | else:
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| 362 | return self.http_error(url, fp, errcode, errmsg, headers, data)
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| 363 |
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| 364 | def http_error(self, url, fp, errcode, errmsg, headers, data=None):
|
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| 365 | """Handle http errors.
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| 366 | Derived class can override this, or provide specific handlers
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| 367 | named http_error_DDD where DDD is the 3-digit error code."""
|
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| 368 | # First check if there's a specific handler for this error
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| 369 | name = 'http_error_%d' % errcode
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| 370 | if hasattr(self, name):
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| 371 | method = getattr(self, name)
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| 372 | if data is None:
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| 373 | result = method(url, fp, errcode, errmsg, headers)
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| 374 | else:
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| 375 | result = method(url, fp, errcode, errmsg, headers, data)
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| 376 | if result: return result
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| 377 | return self.http_error_default(url, fp, errcode, errmsg, headers)
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| 378 |
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| 379 | def http_error_default(self, url, fp, errcode, errmsg, headers):
|
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| 380 | """Default error handler: close the connection and raise IOError."""
|
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| 381 | void = fp.read()
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| 382 | fp.close()
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| 383 | raise IOError, ('http error', errcode, errmsg, headers)
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| 384 |
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| 385 | if _have_ssl:
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| 386 | def open_https(self, url, data=None):
|
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| 387 | """Use HTTPS protocol."""
|
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| 388 |
|
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| 389 | import httplib
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| 390 | user_passwd = None
|
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| 391 | proxy_passwd = None
|
|---|
| 392 | if isinstance(url, str):
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| 393 | host, selector = splithost(url)
|
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| 394 | if host:
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| 395 | user_passwd, host = splituser(host)
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| 396 | host = unquote(host)
|
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| 397 | realhost = host
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| 398 | else:
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| 399 | host, selector = url
|
|---|
| 400 | # here, we determine, whether the proxy contains authorization information
|
|---|
| 401 | proxy_passwd, host = splituser(host)
|
|---|
| 402 | urltype, rest = splittype(selector)
|
|---|
| 403 | url = rest
|
|---|
| 404 | user_passwd = None
|
|---|
| 405 | if urltype.lower() != 'https':
|
|---|
| 406 | realhost = None
|
|---|
| 407 | else:
|
|---|
| 408 | realhost, rest = splithost(rest)
|
|---|
| 409 | if realhost:
|
|---|
| 410 | user_passwd, realhost = splituser(realhost)
|
|---|
| 411 | if user_passwd:
|
|---|
| 412 | selector = "%s://%s%s" % (urltype, realhost, rest)
|
|---|
| 413 | #print "proxy via https:", host, selector
|
|---|
| 414 | if not host: raise IOError, ('https error', 'no host given')
|
|---|
| 415 | if proxy_passwd:
|
|---|
| 416 | import base64
|
|---|
| 417 | proxy_auth = base64.b64encode(proxy_passwd).strip()
|
|---|
| 418 | else:
|
|---|
| 419 | proxy_auth = None
|
|---|
| 420 | if user_passwd:
|
|---|
| 421 | import base64
|
|---|
| 422 | auth = base64.b64encode(user_passwd).strip()
|
|---|
| 423 | else:
|
|---|
| 424 | auth = None
|
|---|
| 425 | h = httplib.HTTPS(host, 0,
|
|---|
| 426 | key_file=self.key_file,
|
|---|
| 427 | cert_file=self.cert_file)
|
|---|
| 428 | if data is not None:
|
|---|
| 429 | h.putrequest('POST', selector)
|
|---|
| 430 | h.putheader('Content-Type',
|
|---|
| 431 | 'application/x-www-form-urlencoded')
|
|---|
| 432 | h.putheader('Content-Length', '%d' % len(data))
|
|---|
| 433 | else:
|
|---|
| 434 | h.putrequest('GET', selector)
|
|---|
| 435 | if proxy_auth: h.putheader('Proxy-Authorization', 'Basic %s' % proxy_auth)
|
|---|
| 436 | if auth: h.putheader('Authorization', 'Basic %s' % auth)
|
|---|
| 437 | if realhost: h.putheader('Host', realhost)
|
|---|
| 438 | for args in self.addheaders: h.putheader(*args)
|
|---|
| 439 | h.endheaders()
|
|---|
| 440 | if data is not None:
|
|---|
| 441 | h.send(data)
|
|---|
| 442 | errcode, errmsg, headers = h.getreply()
|
|---|
| 443 | fp = h.getfile()
|
|---|
| 444 | if errcode == -1:
|
|---|
| 445 | if fp: fp.close()
|
|---|
| 446 | # something went wrong with the HTTP status line
|
|---|
| 447 | raise IOError, ('http protocol error', 0,
|
|---|
| 448 | 'got a bad status line', None)
|
|---|
| 449 | # According to RFC 2616, "2xx" code indicates that the client's
|
|---|
| 450 | # request was successfully received, understood, and accepted.
|
|---|
| 451 | if (200 <= errcode < 300):
|
|---|
| 452 | return addinfourl(fp, headers, "https:" + url, errcode)
|
|---|
| 453 | else:
|
|---|
| 454 | if data is None:
|
|---|
| 455 | return self.http_error(url, fp, errcode, errmsg, headers)
|
|---|
| 456 | else:
|
|---|
| 457 | return self.http_error(url, fp, errcode, errmsg, headers,
|
|---|
| 458 | data)
|
|---|
| 459 |
|
|---|
| 460 | def open_file(self, url):
|
|---|
| 461 | """Use local file or FTP depending on form of URL."""
|
|---|
| 462 | if not isinstance(url, str):
|
|---|
| 463 | raise IOError, ('file error', 'proxy support for file protocol currently not implemented')
|
|---|
| 464 | if url[:2] == '//' and url[2:3] != '/' and url[2:12].lower() != 'localhost/':
|
|---|
| 465 | return self.open_ftp(url)
|
|---|
| 466 | else:
|
|---|
| 467 | return self.open_local_file(url)
|
|---|
| 468 |
|
|---|
| 469 | def open_local_file(self, url):
|
|---|
| 470 | """Use local file."""
|
|---|
| 471 | import mimetypes, mimetools, email.utils
|
|---|
| 472 | try:
|
|---|
| 473 | from cStringIO import StringIO
|
|---|
| 474 | except ImportError:
|
|---|
| 475 | from StringIO import StringIO
|
|---|
| 476 | host, file = splithost(url)
|
|---|
| 477 | localname = url2pathname(file)
|
|---|
| 478 | try:
|
|---|
| 479 | stats = os.stat(localname)
|
|---|
| 480 | except OSError, e:
|
|---|
| 481 | raise IOError(e.errno, e.strerror, e.filename)
|
|---|
| 482 | size = stats.st_size
|
|---|
| 483 | modified = email.utils.formatdate(stats.st_mtime, usegmt=True)
|
|---|
| 484 | mtype = mimetypes.guess_type(url)[0]
|
|---|
| 485 | headers = mimetools.Message(StringIO(
|
|---|
| 486 | 'Content-Type: %s\nContent-Length: %d\nLast-modified: %s\n' %
|
|---|
| 487 | (mtype or 'text/plain', size, modified)))
|
|---|
| 488 | if not host:
|
|---|
| 489 | urlfile = file
|
|---|
| 490 | if file[:1] == '/':
|
|---|
| 491 | urlfile = 'file://' + file
|
|---|
| 492 | return addinfourl(open(localname, 'rb'),
|
|---|
| 493 | headers, urlfile)
|
|---|
| 494 | host, port = splitport(host)
|
|---|
| 495 | if not port \
|
|---|
| 496 | and socket.gethostbyname(host) in (localhost(), thishost()):
|
|---|
| 497 | urlfile = file
|
|---|
| 498 | if file[:1] == '/':
|
|---|
| 499 | urlfile = 'file://' + file
|
|---|
| 500 | return addinfourl(open(localname, 'rb'),
|
|---|
| 501 | headers, urlfile)
|
|---|
| 502 | raise IOError, ('local file error', 'not on local host')
|
|---|
| 503 |
|
|---|
| 504 | def open_ftp(self, url):
|
|---|
| 505 | """Use FTP protocol."""
|
|---|
| 506 | if not isinstance(url, str):
|
|---|
| 507 | raise IOError, ('ftp error', 'proxy support for ftp protocol currently not implemented')
|
|---|
| 508 | import mimetypes, mimetools
|
|---|
| 509 | try:
|
|---|
| 510 | from cStringIO import StringIO
|
|---|
| 511 | except ImportError:
|
|---|
| 512 | from StringIO import StringIO
|
|---|
| 513 | host, path = splithost(url)
|
|---|
| 514 | if not host: raise IOError, ('ftp error', 'no host given')
|
|---|
| 515 | host, port = splitport(host)
|
|---|
| 516 | user, host = splituser(host)
|
|---|
| 517 | if user: user, passwd = splitpasswd(user)
|
|---|
| 518 | else: passwd = None
|
|---|
| 519 | host = unquote(host)
|
|---|
| 520 | user = unquote(user or '')
|
|---|
| 521 | passwd = unquote(passwd or '')
|
|---|
| 522 | host = socket.gethostbyname(host)
|
|---|
| 523 | if not port:
|
|---|
| 524 | import ftplib
|
|---|
| 525 | port = ftplib.FTP_PORT
|
|---|
| 526 | else:
|
|---|
| 527 | port = int(port)
|
|---|
| 528 | path, attrs = splitattr(path)
|
|---|
| 529 | path = unquote(path)
|
|---|
| 530 | dirs = path.split('/')
|
|---|
| 531 | dirs, file = dirs[:-1], dirs[-1]
|
|---|
| 532 | if dirs and not dirs[0]: dirs = dirs[1:]
|
|---|
| 533 | if dirs and not dirs[0]: dirs[0] = '/'
|
|---|
| 534 | key = user, host, port, '/'.join(dirs)
|
|---|
| 535 | # XXX thread unsafe!
|
|---|
| 536 | if len(self.ftpcache) > MAXFTPCACHE:
|
|---|
| 537 | # Prune the cache, rather arbitrarily
|
|---|
| 538 | for k in self.ftpcache.keys():
|
|---|
| 539 | if k != key:
|
|---|
| 540 | v = self.ftpcache[k]
|
|---|
| 541 | del self.ftpcache[k]
|
|---|
| 542 | v.close()
|
|---|
| 543 | try:
|
|---|
| 544 | if not key in self.ftpcache:
|
|---|
| 545 | self.ftpcache[key] = \
|
|---|
| 546 | ftpwrapper(user, passwd, host, port, dirs)
|
|---|
| 547 | if not file: type = 'D'
|
|---|
| 548 | else: type = 'I'
|
|---|
| 549 | for attr in attrs:
|
|---|
| 550 | attr, value = splitvalue(attr)
|
|---|
| 551 | if attr.lower() == 'type' and \
|
|---|
| 552 | value in ('a', 'A', 'i', 'I', 'd', 'D'):
|
|---|
| 553 | type = value.upper()
|
|---|
| 554 | (fp, retrlen) = self.ftpcache[key].retrfile(file, type)
|
|---|
| 555 | mtype = mimetypes.guess_type("ftp:" + url)[0]
|
|---|
| 556 | headers = ""
|
|---|
| 557 | if mtype:
|
|---|
| 558 | headers += "Content-Type: %s\n" % mtype
|
|---|
| 559 | if retrlen is not None and retrlen >= 0:
|
|---|
| 560 | headers += "Content-Length: %d\n" % retrlen
|
|---|
| 561 | headers = mimetools.Message(StringIO(headers))
|
|---|
| 562 | return addinfourl(fp, headers, "ftp:" + url)
|
|---|
| 563 | except ftperrors(), msg:
|
|---|
| 564 | raise IOError, ('ftp error', msg), sys.exc_info()[2]
|
|---|
| 565 |
|
|---|
| 566 | def open_data(self, url, data=None):
|
|---|
| 567 | """Use "data" URL."""
|
|---|
| 568 | if not isinstance(url, str):
|
|---|
| 569 | raise IOError, ('data error', 'proxy support for data protocol currently not implemented')
|
|---|
| 570 | # ignore POSTed data
|
|---|
| 571 | #
|
|---|
| 572 | # syntax of data URLs:
|
|---|
| 573 | # dataurl := "data:" [ mediatype ] [ ";base64" ] "," data
|
|---|
| 574 | # mediatype := [ type "/" subtype ] *( ";" parameter )
|
|---|
| 575 | # data := *urlchar
|
|---|
| 576 | # parameter := attribute "=" value
|
|---|
| 577 | import mimetools
|
|---|
| 578 | try:
|
|---|
| 579 | from cStringIO import StringIO
|
|---|
| 580 | except ImportError:
|
|---|
| 581 | from StringIO import StringIO
|
|---|
| 582 | try:
|
|---|
| 583 | [type, data] = url.split(',', 1)
|
|---|
| 584 | except ValueError:
|
|---|
| 585 | raise IOError, ('data error', 'bad data URL')
|
|---|
| 586 | if not type:
|
|---|
| 587 | type = 'text/plain;charset=US-ASCII'
|
|---|
| 588 | semi = type.rfind(';')
|
|---|
| 589 | if semi >= 0 and '=' not in type[semi:]:
|
|---|
| 590 | encoding = type[semi+1:]
|
|---|
| 591 | type = type[:semi]
|
|---|
| 592 | else:
|
|---|
| 593 | encoding = ''
|
|---|
| 594 | msg = []
|
|---|
| 595 | msg.append('Date: %s'%time.strftime('%a, %d %b %Y %T GMT',
|
|---|
| 596 | time.gmtime(time.time())))
|
|---|
| 597 | msg.append('Content-type: %s' % type)
|
|---|
| 598 | if encoding == 'base64':
|
|---|
| 599 | import base64
|
|---|
| 600 | data = base64.decodestring(data)
|
|---|
| 601 | else:
|
|---|
| 602 | data = unquote(data)
|
|---|
| 603 | msg.append('Content-Length: %d' % len(data))
|
|---|
| 604 | msg.append('')
|
|---|
| 605 | msg.append(data)
|
|---|
| 606 | msg = '\n'.join(msg)
|
|---|
| 607 | f = StringIO(msg)
|
|---|
| 608 | headers = mimetools.Message(f, 0)
|
|---|
| 609 | #f.fileno = None # needed for addinfourl
|
|---|
| 610 | return addinfourl(f, headers, url)
|
|---|
| 611 |
|
|---|
| 612 |
|
|---|
| 613 | class FancyURLopener(URLopener):
|
|---|
| 614 | """Derived class with handlers for errors we can handle (perhaps)."""
|
|---|
| 615 |
|
|---|
| 616 | def __init__(self, *args, **kwargs):
|
|---|
| 617 | URLopener.__init__(self, *args, **kwargs)
|
|---|
| 618 | self.auth_cache = {}
|
|---|
| 619 | self.tries = 0
|
|---|
| 620 | self.maxtries = 10
|
|---|
| 621 |
|
|---|
| 622 | def http_error_default(self, url, fp, errcode, errmsg, headers):
|
|---|
| 623 | """Default error handling -- don't raise an exception."""
|
|---|
| 624 | return addinfourl(fp, headers, "http:" + url, errcode)
|
|---|
| 625 |
|
|---|
| 626 | def http_error_302(self, url, fp, errcode, errmsg, headers, data=None):
|
|---|
| 627 | """Error 302 -- relocated (temporarily)."""
|
|---|
| 628 | self.tries += 1
|
|---|
| 629 | if self.maxtries and self.tries >= self.maxtries:
|
|---|
| 630 | if hasattr(self, "http_error_500"):
|
|---|
| 631 | meth = self.http_error_500
|
|---|
| 632 | else:
|
|---|
| 633 | meth = self.http_error_default
|
|---|
| 634 | self.tries = 0
|
|---|
| 635 | return meth(url, fp, 500,
|
|---|
| 636 | "Internal Server Error: Redirect Recursion", headers)
|
|---|
| 637 | result = self.redirect_internal(url, fp, errcode, errmsg, headers,
|
|---|
| 638 | data)
|
|---|
| 639 | self.tries = 0
|
|---|
| 640 | return result
|
|---|
| 641 |
|
|---|
| 642 | def redirect_internal(self, url, fp, errcode, errmsg, headers, data):
|
|---|
| 643 | if 'location' in headers:
|
|---|
| 644 | newurl = headers['location']
|
|---|
| 645 | elif 'uri' in headers:
|
|---|
| 646 | newurl = headers['uri']
|
|---|
| 647 | else:
|
|---|
| 648 | return
|
|---|
| 649 | void = fp.read()
|
|---|
| 650 | fp.close()
|
|---|
| 651 | # In case the server sent a relative URL, join with original:
|
|---|
| 652 | newurl = basejoin(self.type + ":" + url, newurl)
|
|---|
| 653 | return self.open(newurl)
|
|---|
| 654 |
|
|---|
| 655 | def http_error_301(self, url, fp, errcode, errmsg, headers, data=None):
|
|---|
| 656 | """Error 301 -- also relocated (permanently)."""
|
|---|
| 657 | return self.http_error_302(url, fp, errcode, errmsg, headers, data)
|
|---|
| 658 |
|
|---|
| 659 | def http_error_303(self, url, fp, errcode, errmsg, headers, data=None):
|
|---|
| 660 | """Error 303 -- also relocated (essentially identical to 302)."""
|
|---|
| 661 | return self.http_error_302(url, fp, errcode, errmsg, headers, data)
|
|---|
| 662 |
|
|---|
| 663 | def http_error_307(self, url, fp, errcode, errmsg, headers, data=None):
|
|---|
| 664 | """Error 307 -- relocated, but turn POST into error."""
|
|---|
| 665 | if data is None:
|
|---|
| 666 | return self.http_error_302(url, fp, errcode, errmsg, headers, data)
|
|---|
| 667 | else:
|
|---|
| 668 | return self.http_error_default(url, fp, errcode, errmsg, headers)
|
|---|
| 669 |
|
|---|
| 670 | def http_error_401(self, url, fp, errcode, errmsg, headers, data=None):
|
|---|
| 671 | """Error 401 -- authentication required.
|
|---|
| 672 | This function supports Basic authentication only."""
|
|---|
| 673 | if not 'www-authenticate' in headers:
|
|---|
| 674 | URLopener.http_error_default(self, url, fp,
|
|---|
| 675 | errcode, errmsg, headers)
|
|---|
| 676 | stuff = headers['www-authenticate']
|
|---|
| 677 | import re
|
|---|
| 678 | match = re.match('[ \t]*([^ \t]+)[ \t]+realm="([^"]*)"', stuff)
|
|---|
| 679 | if not match:
|
|---|
| 680 | URLopener.http_error_default(self, url, fp,
|
|---|
| 681 | errcode, errmsg, headers)
|
|---|
| 682 | scheme, realm = match.groups()
|
|---|
| 683 | if scheme.lower() != 'basic':
|
|---|
| 684 | URLopener.http_error_default(self, url, fp,
|
|---|
| 685 | errcode, errmsg, headers)
|
|---|
| 686 | name = 'retry_' + self.type + '_basic_auth'
|
|---|
| 687 | if data is None:
|
|---|
| 688 | return getattr(self,name)(url, realm)
|
|---|
| 689 | else:
|
|---|
| 690 | return getattr(self,name)(url, realm, data)
|
|---|
| 691 |
|
|---|
| 692 | def http_error_407(self, url, fp, errcode, errmsg, headers, data=None):
|
|---|
| 693 | """Error 407 -- proxy authentication required.
|
|---|
| 694 | This function supports Basic authentication only."""
|
|---|
| 695 | if not 'proxy-authenticate' in headers:
|
|---|
| 696 | URLopener.http_error_default(self, url, fp,
|
|---|
| 697 | errcode, errmsg, headers)
|
|---|
| 698 | stuff = headers['proxy-authenticate']
|
|---|
| 699 | import re
|
|---|
| 700 | match = re.match('[ \t]*([^ \t]+)[ \t]+realm="([^"]*)"', stuff)
|
|---|
| 701 | if not match:
|
|---|
| 702 | URLopener.http_error_default(self, url, fp,
|
|---|
| 703 | errcode, errmsg, headers)
|
|---|
| 704 | scheme, realm = match.groups()
|
|---|
| 705 | if scheme.lower() != 'basic':
|
|---|
| 706 | URLopener.http_error_default(self, url, fp,
|
|---|
| 707 | errcode, errmsg, headers)
|
|---|
| 708 | name = 'retry_proxy_' + self.type + '_basic_auth'
|
|---|
| 709 | if data is None:
|
|---|
| 710 | return getattr(self,name)(url, realm)
|
|---|
| 711 | else:
|
|---|
| 712 | return getattr(self,name)(url, realm, data)
|
|---|
| 713 |
|
|---|
| 714 | def retry_proxy_http_basic_auth(self, url, realm, data=None):
|
|---|
| 715 | host, selector = splithost(url)
|
|---|
| 716 | newurl = 'http://' + host + selector
|
|---|
| 717 | proxy = self.proxies['http']
|
|---|
| 718 | urltype, proxyhost = splittype(proxy)
|
|---|
| 719 | proxyhost, proxyselector = splithost(proxyhost)
|
|---|
| 720 | i = proxyhost.find('@') + 1
|
|---|
| 721 | proxyhost = proxyhost[i:]
|
|---|
| 722 | user, passwd = self.get_user_passwd(proxyhost, realm, i)
|
|---|
| 723 | if not (user or passwd): return None
|
|---|
| 724 | proxyhost = quote(user, safe='') + ':' + quote(passwd, safe='') + '@' + proxyhost
|
|---|
| 725 | self.proxies['http'] = 'http://' + proxyhost + proxyselector
|
|---|
| 726 | if data is None:
|
|---|
| 727 | return self.open(newurl)
|
|---|
| 728 | else:
|
|---|
| 729 | return self.open(newurl, data)
|
|---|
| 730 |
|
|---|
| 731 | def retry_proxy_https_basic_auth(self, url, realm, data=None):
|
|---|
| 732 | host, selector = splithost(url)
|
|---|
| 733 | newurl = 'https://' + host + selector
|
|---|
| 734 | proxy = self.proxies['https']
|
|---|
| 735 | urltype, proxyhost = splittype(proxy)
|
|---|
| 736 | proxyhost, proxyselector = splithost(proxyhost)
|
|---|
| 737 | i = proxyhost.find('@') + 1
|
|---|
| 738 | proxyhost = proxyhost[i:]
|
|---|
| 739 | user, passwd = self.get_user_passwd(proxyhost, realm, i)
|
|---|
| 740 | if not (user or passwd): return None
|
|---|
| 741 | proxyhost = quote(user, safe='') + ':' + quote(passwd, safe='') + '@' + proxyhost
|
|---|
| 742 | self.proxies['https'] = 'https://' + proxyhost + proxyselector
|
|---|
| 743 | if data is None:
|
|---|
| 744 | return self.open(newurl)
|
|---|
| 745 | else:
|
|---|
| 746 | return self.open(newurl, data)
|
|---|
| 747 |
|
|---|
| 748 | def retry_http_basic_auth(self, url, realm, data=None):
|
|---|
| 749 | host, selector = splithost(url)
|
|---|
| 750 | i = host.find('@') + 1
|
|---|
| 751 | host = host[i:]
|
|---|
| 752 | user, passwd = self.get_user_passwd(host, realm, i)
|
|---|
| 753 | if not (user or passwd): return None
|
|---|
| 754 | host = quote(user, safe='') + ':' + quote(passwd, safe='') + '@' + host
|
|---|
| 755 | newurl = 'http://' + host + selector
|
|---|
| 756 | if data is None:
|
|---|
| 757 | return self.open(newurl)
|
|---|
| 758 | else:
|
|---|
| 759 | return self.open(newurl, data)
|
|---|
| 760 |
|
|---|
| 761 | def retry_https_basic_auth(self, url, realm, data=None):
|
|---|
| 762 | host, selector = splithost(url)
|
|---|
| 763 | i = host.find('@') + 1
|
|---|
| 764 | host = host[i:]
|
|---|
| 765 | user, passwd = self.get_user_passwd(host, realm, i)
|
|---|
| 766 | if not (user or passwd): return None
|
|---|
| 767 | host = quote(user, safe='') + ':' + quote(passwd, safe='') + '@' + host
|
|---|
| 768 | newurl = 'https://' + host + selector
|
|---|
| 769 | if data is None:
|
|---|
| 770 | return self.open(newurl)
|
|---|
| 771 | else:
|
|---|
| 772 | return self.open(newurl, data)
|
|---|
| 773 |
|
|---|
| 774 | def get_user_passwd(self, host, realm, clear_cache = 0):
|
|---|
| 775 | key = realm + '@' + host.lower()
|
|---|
| 776 | if key in self.auth_cache:
|
|---|
| 777 | if clear_cache:
|
|---|
| 778 | del self.auth_cache[key]
|
|---|
| 779 | else:
|
|---|
| 780 | return self.auth_cache[key]
|
|---|
| 781 | user, passwd = self.prompt_user_passwd(host, realm)
|
|---|
| 782 | if user or passwd: self.auth_cache[key] = (user, passwd)
|
|---|
| 783 | return user, passwd
|
|---|
| 784 |
|
|---|
| 785 | def prompt_user_passwd(self, host, realm):
|
|---|
| 786 | """Override this in a GUI environment!"""
|
|---|
| 787 | import getpass
|
|---|
| 788 | try:
|
|---|
| 789 | user = raw_input("Enter username for %s at %s: " % (realm,
|
|---|
| 790 | host))
|
|---|
| 791 | passwd = getpass.getpass("Enter password for %s in %s at %s: " %
|
|---|
| 792 | (user, realm, host))
|
|---|
| 793 | return user, passwd
|
|---|
| 794 | except KeyboardInterrupt:
|
|---|
| 795 | print
|
|---|
| 796 | return None, None
|
|---|
| 797 |
|
|---|
| 798 |
|
|---|
| 799 | # Utility functions
|
|---|
| 800 |
|
|---|
| 801 | _localhost = None
|
|---|
| 802 | def localhost():
|
|---|
| 803 | """Return the IP address of the magic hostname 'localhost'."""
|
|---|
| 804 | global _localhost
|
|---|
| 805 | if _localhost is None:
|
|---|
| 806 | _localhost = socket.gethostbyname('localhost')
|
|---|
| 807 | return _localhost
|
|---|
| 808 |
|
|---|
| 809 | _thishost = None
|
|---|
| 810 | def thishost():
|
|---|
| 811 | """Return the IP address of the current host."""
|
|---|
| 812 | global _thishost
|
|---|
| 813 | if _thishost is None:
|
|---|
| 814 | _thishost = socket.gethostbyname(socket.gethostname())
|
|---|
| 815 | return _thishost
|
|---|
| 816 |
|
|---|
| 817 | _ftperrors = None
|
|---|
| 818 | def ftperrors():
|
|---|
| 819 | """Return the set of errors raised by the FTP class."""
|
|---|
| 820 | global _ftperrors
|
|---|
| 821 | if _ftperrors is None:
|
|---|
| 822 | import ftplib
|
|---|
| 823 | _ftperrors = ftplib.all_errors
|
|---|
| 824 | return _ftperrors
|
|---|
| 825 |
|
|---|
| 826 | _noheaders = None
|
|---|
| 827 | def noheaders():
|
|---|
| 828 | """Return an empty mimetools.Message object."""
|
|---|
| 829 | global _noheaders
|
|---|
| 830 | if _noheaders is None:
|
|---|
| 831 | import mimetools
|
|---|
| 832 | try:
|
|---|
| 833 | from cStringIO import StringIO
|
|---|
| 834 | except ImportError:
|
|---|
| 835 | from StringIO import StringIO
|
|---|
| 836 | _noheaders = mimetools.Message(StringIO(), 0)
|
|---|
| 837 | _noheaders.fp.close() # Recycle file descriptor
|
|---|
| 838 | return _noheaders
|
|---|
| 839 |
|
|---|
| 840 |
|
|---|
| 841 | # Utility classes
|
|---|
| 842 |
|
|---|
| 843 | class ftpwrapper:
|
|---|
| 844 | """Class used by open_ftp() for cache of open FTP connections."""
|
|---|
| 845 |
|
|---|
| 846 | def __init__(self, user, passwd, host, port, dirs,
|
|---|
| 847 | timeout=socket._GLOBAL_DEFAULT_TIMEOUT):
|
|---|
| 848 | self.user = user
|
|---|
| 849 | self.passwd = passwd
|
|---|
| 850 | self.host = host
|
|---|
| 851 | self.port = port
|
|---|
| 852 | self.dirs = dirs
|
|---|
| 853 | self.timeout = timeout
|
|---|
| 854 | self.init()
|
|---|
| 855 |
|
|---|
| 856 | def init(self):
|
|---|
| 857 | import ftplib
|
|---|
| 858 | self.busy = 0
|
|---|
| 859 | self.ftp = ftplib.FTP()
|
|---|
| 860 | self.ftp.connect(self.host, self.port, self.timeout)
|
|---|
| 861 | self.ftp.login(self.user, self.passwd)
|
|---|
| 862 | for dir in self.dirs:
|
|---|
| 863 | self.ftp.cwd(dir)
|
|---|
| 864 |
|
|---|
| 865 | def retrfile(self, file, type):
|
|---|
| 866 | import ftplib
|
|---|
| 867 | self.endtransfer()
|
|---|
| 868 | if type in ('d', 'D'): cmd = 'TYPE A'; isdir = 1
|
|---|
| 869 | else: cmd = 'TYPE ' + type; isdir = 0
|
|---|
| 870 | try:
|
|---|
| 871 | self.ftp.voidcmd(cmd)
|
|---|
| 872 | except ftplib.all_errors:
|
|---|
| 873 | self.init()
|
|---|
| 874 | self.ftp.voidcmd(cmd)
|
|---|
| 875 | conn = None
|
|---|
| 876 | if file and not isdir:
|
|---|
| 877 | # Try to retrieve as a file
|
|---|
| 878 | try:
|
|---|
| 879 | cmd = 'RETR ' + file
|
|---|
| 880 | conn = self.ftp.ntransfercmd(cmd)
|
|---|
| 881 | except ftplib.error_perm, reason:
|
|---|
| 882 | if str(reason)[:3] != '550':
|
|---|
| 883 | raise IOError, ('ftp error', reason), sys.exc_info()[2]
|
|---|
| 884 | if not conn:
|
|---|
| 885 | # Set transfer mode to ASCII!
|
|---|
| 886 | self.ftp.voidcmd('TYPE A')
|
|---|
| 887 | # Try a directory listing. Verify that directory exists.
|
|---|
| 888 | if file:
|
|---|
| 889 | pwd = self.ftp.pwd()
|
|---|
| 890 | try:
|
|---|
| 891 | try:
|
|---|
| 892 | self.ftp.cwd(file)
|
|---|
| 893 | except ftplib.error_perm, reason:
|
|---|
| 894 | raise IOError, ('ftp error', reason), sys.exc_info()[2]
|
|---|
| 895 | finally:
|
|---|
| 896 | self.ftp.cwd(pwd)
|
|---|
| 897 | cmd = 'LIST ' + file
|
|---|
| 898 | else:
|
|---|
| 899 | cmd = 'LIST'
|
|---|
| 900 | conn = self.ftp.ntransfercmd(cmd)
|
|---|
| 901 | self.busy = 1
|
|---|
| 902 | # Pass back both a suitably decorated object and a retrieval length
|
|---|
| 903 | return (addclosehook(conn[0].makefile('rb'),
|
|---|
| 904 | self.endtransfer), conn[1])
|
|---|
| 905 | def endtransfer(self):
|
|---|
| 906 | if not self.busy:
|
|---|
| 907 | return
|
|---|
| 908 | self.busy = 0
|
|---|
| 909 | try:
|
|---|
| 910 | self.ftp.voidresp()
|
|---|
| 911 | except ftperrors():
|
|---|
| 912 | pass
|
|---|
| 913 |
|
|---|
| 914 | def close(self):
|
|---|
| 915 | self.endtransfer()
|
|---|
| 916 | try:
|
|---|
| 917 | self.ftp.close()
|
|---|
| 918 | except ftperrors():
|
|---|
| 919 | pass
|
|---|
| 920 |
|
|---|
| 921 | class addbase:
|
|---|
| 922 | """Base class for addinfo and addclosehook."""
|
|---|
| 923 |
|
|---|
| 924 | def __init__(self, fp):
|
|---|
| 925 | self.fp = fp
|
|---|
| 926 | self.read = self.fp.read
|
|---|
| 927 | self.readline = self.fp.readline
|
|---|
| 928 | if hasattr(self.fp, "readlines"): self.readlines = self.fp.readlines
|
|---|
| 929 | if hasattr(self.fp, "fileno"):
|
|---|
| 930 | self.fileno = self.fp.fileno
|
|---|
| 931 | else:
|
|---|
| 932 | self.fileno = lambda: None
|
|---|
| 933 | if hasattr(self.fp, "__iter__"):
|
|---|
| 934 | self.__iter__ = self.fp.__iter__
|
|---|
| 935 | if hasattr(self.fp, "next"):
|
|---|
| 936 | self.next = self.fp.next
|
|---|
| 937 |
|
|---|
| 938 | def __repr__(self):
|
|---|
| 939 | return '<%s at %r whose fp = %r>' % (self.__class__.__name__,
|
|---|
| 940 | id(self), self.fp)
|
|---|
| 941 |
|
|---|
| 942 | def close(self):
|
|---|
| 943 | self.read = None
|
|---|
| 944 | self.readline = None
|
|---|
| 945 | self.readlines = None
|
|---|
| 946 | self.fileno = None
|
|---|
| 947 | if self.fp: self.fp.close()
|
|---|
| 948 | self.fp = None
|
|---|
| 949 |
|
|---|
| 950 | class addclosehook(addbase):
|
|---|
| 951 | """Class to add a close hook to an open file."""
|
|---|
| 952 |
|
|---|
| 953 | def __init__(self, fp, closehook, *hookargs):
|
|---|
| 954 | addbase.__init__(self, fp)
|
|---|
| 955 | self.closehook = closehook
|
|---|
| 956 | self.hookargs = hookargs
|
|---|
| 957 |
|
|---|
| 958 | def close(self):
|
|---|
| 959 | addbase.close(self)
|
|---|
| 960 | if self.closehook:
|
|---|
| 961 | self.closehook(*self.hookargs)
|
|---|
| 962 | self.closehook = None
|
|---|
| 963 | self.hookargs = None
|
|---|
| 964 |
|
|---|
| 965 | class addinfo(addbase):
|
|---|
| 966 | """class to add an info() method to an open file."""
|
|---|
| 967 |
|
|---|
| 968 | def __init__(self, fp, headers):
|
|---|
| 969 | addbase.__init__(self, fp)
|
|---|
| 970 | self.headers = headers
|
|---|
| 971 |
|
|---|
| 972 | def info(self):
|
|---|
| 973 | return self.headers
|
|---|
| 974 |
|
|---|
| 975 | class addinfourl(addbase):
|
|---|
| 976 | """class to add info() and geturl() methods to an open file."""
|
|---|
| 977 |
|
|---|
| 978 | def __init__(self, fp, headers, url, code=None):
|
|---|
| 979 | addbase.__init__(self, fp)
|
|---|
| 980 | self.headers = headers
|
|---|
| 981 | self.url = url
|
|---|
| 982 | self.code = code
|
|---|
| 983 |
|
|---|
| 984 | def info(self):
|
|---|
| 985 | return self.headers
|
|---|
| 986 |
|
|---|
| 987 | def getcode(self):
|
|---|
| 988 | return self.code
|
|---|
| 989 |
|
|---|
| 990 | def geturl(self):
|
|---|
| 991 | return self.url
|
|---|
| 992 |
|
|---|
| 993 |
|
|---|
| 994 | # Utilities to parse URLs (most of these return None for missing parts):
|
|---|
| 995 | # unwrap('<URL:type://host/path>') --> 'type://host/path'
|
|---|
| 996 | # splittype('type:opaquestring') --> 'type', 'opaquestring'
|
|---|
| 997 | # splithost('//host[:port]/path') --> 'host[:port]', '/path'
|
|---|
| 998 | # splituser('user[:passwd]@host[:port]') --> 'user[:passwd]', 'host[:port]'
|
|---|
| 999 | # splitpasswd('user:passwd') -> 'user', 'passwd'
|
|---|
| 1000 | # splitport('host:port') --> 'host', 'port'
|
|---|
| 1001 | # splitquery('/path?query') --> '/path', 'query'
|
|---|
| 1002 | # splittag('/path#tag') --> '/path', 'tag'
|
|---|
| 1003 | # splitattr('/path;attr1=value1;attr2=value2;...') ->
|
|---|
| 1004 | # '/path', ['attr1=value1', 'attr2=value2', ...]
|
|---|
| 1005 | # splitvalue('attr=value') --> 'attr', 'value'
|
|---|
| 1006 | # unquote('abc%20def') -> 'abc def'
|
|---|
| 1007 | # quote('abc def') -> 'abc%20def')
|
|---|
| 1008 |
|
|---|
| 1009 | try:
|
|---|
| 1010 | unicode
|
|---|
| 1011 | except NameError:
|
|---|
| 1012 | def _is_unicode(x):
|
|---|
| 1013 | return 0
|
|---|
| 1014 | else:
|
|---|
| 1015 | def _is_unicode(x):
|
|---|
| 1016 | return isinstance(x, unicode)
|
|---|
| 1017 |
|
|---|
| 1018 | def toBytes(url):
|
|---|
| 1019 | """toBytes(u"URL") --> 'URL'."""
|
|---|
| 1020 | # Most URL schemes require ASCII. If that changes, the conversion
|
|---|
| 1021 | # can be relaxed
|
|---|
| 1022 | if _is_unicode(url):
|
|---|
| 1023 | try:
|
|---|
| 1024 | url = url.encode("ASCII")
|
|---|
| 1025 | except UnicodeError:
|
|---|
| 1026 | raise UnicodeError("URL " + repr(url) +
|
|---|
| 1027 | " contains non-ASCII characters")
|
|---|
| 1028 | return url
|
|---|
| 1029 |
|
|---|
| 1030 | def unwrap(url):
|
|---|
| 1031 | """unwrap('<URL:type://host/path>') --> 'type://host/path'."""
|
|---|
| 1032 | url = url.strip()
|
|---|
| 1033 | if url[:1] == '<' and url[-1:] == '>':
|
|---|
| 1034 | url = url[1:-1].strip()
|
|---|
| 1035 | if url[:4] == 'URL:': url = url[4:].strip()
|
|---|
| 1036 | return url
|
|---|
| 1037 |
|
|---|
| 1038 | _typeprog = None
|
|---|
| 1039 | def splittype(url):
|
|---|
| 1040 | """splittype('type:opaquestring') --> 'type', 'opaquestring'."""
|
|---|
| 1041 | global _typeprog
|
|---|
| 1042 | if _typeprog is None:
|
|---|
| 1043 | import re
|
|---|
| 1044 | _typeprog = re.compile('^([^/:]+):')
|
|---|
| 1045 |
|
|---|
| 1046 | match = _typeprog.match(url)
|
|---|
| 1047 | if match:
|
|---|
| 1048 | scheme = match.group(1)
|
|---|
| 1049 | return scheme.lower(), url[len(scheme) + 1:]
|
|---|
| 1050 | return None, url
|
|---|
| 1051 |
|
|---|
| 1052 | _hostprog = None
|
|---|
| 1053 | def splithost(url):
|
|---|
| 1054 | """splithost('//host[:port]/path') --> 'host[:port]', '/path'."""
|
|---|
| 1055 | global _hostprog
|
|---|
| 1056 | if _hostprog is None:
|
|---|
| 1057 | import re
|
|---|
| 1058 | _hostprog = re.compile('^//([^/?]*)(.*)$')
|
|---|
| 1059 |
|
|---|
| 1060 | match = _hostprog.match(url)
|
|---|
| 1061 | if match: return match.group(1, 2)
|
|---|
| 1062 | return None, url
|
|---|
| 1063 |
|
|---|
| 1064 | _userprog = None
|
|---|
| 1065 | def splituser(host):
|
|---|
| 1066 | """splituser('user[:passwd]@host[:port]') --> 'user[:passwd]', 'host[:port]'."""
|
|---|
| 1067 | global _userprog
|
|---|
| 1068 | if _userprog is None:
|
|---|
| 1069 | import re
|
|---|
| 1070 | _userprog = re.compile('^(.*)@(.*)$')
|
|---|
| 1071 |
|
|---|
| 1072 | match = _userprog.match(host)
|
|---|
| 1073 | if match: return map(unquote, match.group(1, 2))
|
|---|
| 1074 | return None, host
|
|---|
| 1075 |
|
|---|
| 1076 | _passwdprog = None
|
|---|
| 1077 | def splitpasswd(user):
|
|---|
| 1078 | """splitpasswd('user:passwd') -> 'user', 'passwd'."""
|
|---|
| 1079 | global _passwdprog
|
|---|
| 1080 | if _passwdprog is None:
|
|---|
| 1081 | import re
|
|---|
| 1082 | _passwdprog = re.compile('^([^:]*):(.*)$')
|
|---|
| 1083 |
|
|---|
| 1084 | match = _passwdprog.match(user)
|
|---|
| 1085 | if match: return match.group(1, 2)
|
|---|
| 1086 | return user, None
|
|---|
| 1087 |
|
|---|
| 1088 | # splittag('/path#tag') --> '/path', 'tag'
|
|---|
| 1089 | _portprog = None
|
|---|
| 1090 | def splitport(host):
|
|---|
| 1091 | """splitport('host:port') --> 'host', 'port'."""
|
|---|
| 1092 | global _portprog
|
|---|
| 1093 | if _portprog is None:
|
|---|
| 1094 | import re
|
|---|
| 1095 | _portprog = re.compile('^(.*):([0-9]+)$')
|
|---|
| 1096 |
|
|---|
| 1097 | match = _portprog.match(host)
|
|---|
| 1098 | if match: return match.group(1, 2)
|
|---|
| 1099 | return host, None
|
|---|
| 1100 |
|
|---|
| 1101 | _nportprog = None
|
|---|
| 1102 | def splitnport(host, defport=-1):
|
|---|
| 1103 | """Split host and port, returning numeric port.
|
|---|
| 1104 | Return given default port if no ':' found; defaults to -1.
|
|---|
| 1105 | Return numerical port if a valid number are found after ':'.
|
|---|
| 1106 | Return None if ':' but not a valid number."""
|
|---|
| 1107 | global _nportprog
|
|---|
| 1108 | if _nportprog is None:
|
|---|
| 1109 | import re
|
|---|
| 1110 | _nportprog = re.compile('^(.*):(.*)$')
|
|---|
| 1111 |
|
|---|
| 1112 | match = _nportprog.match(host)
|
|---|
| 1113 | if match:
|
|---|
| 1114 | host, port = match.group(1, 2)
|
|---|
| 1115 | try:
|
|---|
| 1116 | if not port: raise ValueError, "no digits"
|
|---|
| 1117 | nport = int(port)
|
|---|
| 1118 | except ValueError:
|
|---|
| 1119 | nport = None
|
|---|
| 1120 | return host, nport
|
|---|
| 1121 | return host, defport
|
|---|
| 1122 |
|
|---|
| 1123 | _queryprog = None
|
|---|
| 1124 | def splitquery(url):
|
|---|
| 1125 | """splitquery('/path?query') --> '/path', 'query'."""
|
|---|
| 1126 | global _queryprog
|
|---|
| 1127 | if _queryprog is None:
|
|---|
| 1128 | import re
|
|---|
| 1129 | _queryprog = re.compile('^(.*)\?([^?]*)$')
|
|---|
| 1130 |
|
|---|
| 1131 | match = _queryprog.match(url)
|
|---|
| 1132 | if match: return match.group(1, 2)
|
|---|
| 1133 | return url, None
|
|---|
| 1134 |
|
|---|
| 1135 | _tagprog = None
|
|---|
| 1136 | def splittag(url):
|
|---|
| 1137 | """splittag('/path#tag') --> '/path', 'tag'."""
|
|---|
| 1138 | global _tagprog
|
|---|
| 1139 | if _tagprog is None:
|
|---|
| 1140 | import re
|
|---|
| 1141 | _tagprog = re.compile('^(.*)#([^#]*)$')
|
|---|
| 1142 |
|
|---|
| 1143 | match = _tagprog.match(url)
|
|---|
| 1144 | if match: return match.group(1, 2)
|
|---|
| 1145 | return url, None
|
|---|
| 1146 |
|
|---|
| 1147 | def splitattr(url):
|
|---|
| 1148 | """splitattr('/path;attr1=value1;attr2=value2;...') ->
|
|---|
| 1149 | '/path', ['attr1=value1', 'attr2=value2', ...]."""
|
|---|
| 1150 | words = url.split(';')
|
|---|
| 1151 | return words[0], words[1:]
|
|---|
| 1152 |
|
|---|
| 1153 | _valueprog = None
|
|---|
| 1154 | def splitvalue(attr):
|
|---|
| 1155 | """splitvalue('attr=value') --> 'attr', 'value'."""
|
|---|
| 1156 | global _valueprog
|
|---|
| 1157 | if _valueprog is None:
|
|---|
| 1158 | import re
|
|---|
| 1159 | _valueprog = re.compile('^([^=]*)=(.*)$')
|
|---|
| 1160 |
|
|---|
| 1161 | match = _valueprog.match(attr)
|
|---|
| 1162 | if match: return match.group(1, 2)
|
|---|
| 1163 | return attr, None
|
|---|
| 1164 |
|
|---|
| 1165 | _hextochr = dict(('%02x' % i, chr(i)) for i in range(256))
|
|---|
| 1166 | _hextochr.update(('%02X' % i, chr(i)) for i in range(256))
|
|---|
| 1167 |
|
|---|
| 1168 | def unquote(s):
|
|---|
| 1169 | """unquote('abc%20def') -> 'abc def'."""
|
|---|
| 1170 | res = s.split('%')
|
|---|
| 1171 | for i in xrange(1, len(res)):
|
|---|
| 1172 | item = res[i]
|
|---|
| 1173 | try:
|
|---|
| 1174 | res[i] = _hextochr[item[:2]] + item[2:]
|
|---|
| 1175 | except KeyError:
|
|---|
| 1176 | res[i] = '%' + item
|
|---|
| 1177 | except UnicodeDecodeError:
|
|---|
| 1178 | res[i] = unichr(int(item[:2], 16)) + item[2:]
|
|---|
| 1179 | return "".join(res)
|
|---|
| 1180 |
|
|---|
| 1181 | def unquote_plus(s):
|
|---|
| 1182 | """unquote('%7e/abc+def') -> '~/abc def'"""
|
|---|
| 1183 | s = s.replace('+', ' ')
|
|---|
| 1184 | return unquote(s)
|
|---|
| 1185 |
|
|---|
| 1186 | always_safe = ('ABCDEFGHIJKLMNOPQRSTUVWXYZ'
|
|---|
| 1187 | 'abcdefghijklmnopqrstuvwxyz'
|
|---|
| 1188 | '0123456789' '_.-')
|
|---|
| 1189 | _safemaps = {}
|
|---|
| 1190 |
|
|---|
| 1191 | def quote(s, safe = '/'):
|
|---|
| 1192 | """quote('abc def') -> 'abc%20def'
|
|---|
| 1193 |
|
|---|
| 1194 | Each part of a URL, e.g. the path info, the query, etc., has a
|
|---|
| 1195 | different set of reserved characters that must be quoted.
|
|---|
| 1196 |
|
|---|
| 1197 | RFC 2396 Uniform Resource Identifiers (URI): Generic Syntax lists
|
|---|
| 1198 | the following reserved characters.
|
|---|
| 1199 |
|
|---|
| 1200 | reserved = ";" | "/" | "?" | ":" | "@" | "&" | "=" | "+" |
|
|---|
| 1201 | "$" | ","
|
|---|
| 1202 |
|
|---|
| 1203 | Each of these characters is reserved in some component of a URL,
|
|---|
| 1204 | but not necessarily in all of them.
|
|---|
| 1205 |
|
|---|
| 1206 | By default, the quote function is intended for quoting the path
|
|---|
| 1207 | section of a URL. Thus, it will not encode '/'. This character
|
|---|
| 1208 | is reserved, but in typical usage the quote function is being
|
|---|
| 1209 | called on a path where the existing slash characters are used as
|
|---|
| 1210 | reserved characters.
|
|---|
| 1211 | """
|
|---|
| 1212 | cachekey = (safe, always_safe)
|
|---|
| 1213 | try:
|
|---|
| 1214 | safe_map = _safemaps[cachekey]
|
|---|
| 1215 | except KeyError:
|
|---|
| 1216 | safe += always_safe
|
|---|
| 1217 | safe_map = {}
|
|---|
| 1218 | for i in range(256):
|
|---|
| 1219 | c = chr(i)
|
|---|
| 1220 | safe_map[c] = (c in safe) and c or ('%%%02X' % i)
|
|---|
| 1221 | _safemaps[cachekey] = safe_map
|
|---|
| 1222 | res = map(safe_map.__getitem__, s)
|
|---|
| 1223 | return ''.join(res)
|
|---|
| 1224 |
|
|---|
| 1225 | def quote_plus(s, safe = ''):
|
|---|
| 1226 | """Quote the query fragment of a URL; replacing ' ' with '+'"""
|
|---|
| 1227 | if ' ' in s:
|
|---|
| 1228 | s = quote(s, safe + ' ')
|
|---|
| 1229 | return s.replace(' ', '+')
|
|---|
| 1230 | return quote(s, safe)
|
|---|
| 1231 |
|
|---|
| 1232 | def urlencode(query,doseq=0):
|
|---|
| 1233 | """Encode a sequence of two-element tuples or dictionary into a URL query string.
|
|---|
| 1234 |
|
|---|
| 1235 | If any values in the query arg are sequences and doseq is true, each
|
|---|
| 1236 | sequence element is converted to a separate parameter.
|
|---|
| 1237 |
|
|---|
| 1238 | If the query arg is a sequence of two-element tuples, the order of the
|
|---|
| 1239 | parameters in the output will match the order of parameters in the
|
|---|
| 1240 | input.
|
|---|
| 1241 | """
|
|---|
| 1242 |
|
|---|
| 1243 | if hasattr(query,"items"):
|
|---|
| 1244 | # mapping objects
|
|---|
| 1245 | query = query.items()
|
|---|
| 1246 | else:
|
|---|
| 1247 | # it's a bother at times that strings and string-like objects are
|
|---|
| 1248 | # sequences...
|
|---|
| 1249 | try:
|
|---|
| 1250 | # non-sequence items should not work with len()
|
|---|
| 1251 | # non-empty strings will fail this
|
|---|
| 1252 | if len(query) and not isinstance(query[0], tuple):
|
|---|
| 1253 | raise TypeError
|
|---|
| 1254 | # zero-length sequences of all types will get here and succeed,
|
|---|
| 1255 | # but that's a minor nit - since the original implementation
|
|---|
| 1256 | # allowed empty dicts that type of behavior probably should be
|
|---|
| 1257 | # preserved for consistency
|
|---|
| 1258 | except TypeError:
|
|---|
| 1259 | ty,va,tb = sys.exc_info()
|
|---|
| 1260 | raise TypeError, "not a valid non-string sequence or mapping object", tb
|
|---|
| 1261 |
|
|---|
| 1262 | l = []
|
|---|
| 1263 | if not doseq:
|
|---|
| 1264 | # preserve old behavior
|
|---|
| 1265 | for k, v in query:
|
|---|
| 1266 | k = quote_plus(str(k))
|
|---|
| 1267 | v = quote_plus(str(v))
|
|---|
| 1268 | l.append(k + '=' + v)
|
|---|
| 1269 | else:
|
|---|
| 1270 | for k, v in query:
|
|---|
| 1271 | k = quote_plus(str(k))
|
|---|
| 1272 | if isinstance(v, str):
|
|---|
| 1273 | v = quote_plus(v)
|
|---|
| 1274 | l.append(k + '=' + v)
|
|---|
| 1275 | elif _is_unicode(v):
|
|---|
| 1276 | # is there a reasonable way to convert to ASCII?
|
|---|
| 1277 | # encode generates a string, but "replace" or "ignore"
|
|---|
| 1278 | # lose information and "strict" can raise UnicodeError
|
|---|
| 1279 | v = quote_plus(v.encode("ASCII","replace"))
|
|---|
| 1280 | l.append(k + '=' + v)
|
|---|
| 1281 | else:
|
|---|
| 1282 | try:
|
|---|
| 1283 | # is this a sufficient test for sequence-ness?
|
|---|
| 1284 | x = len(v)
|
|---|
| 1285 | except TypeError:
|
|---|
| 1286 | # not a sequence
|
|---|
| 1287 | v = quote_plus(str(v))
|
|---|
| 1288 | l.append(k + '=' + v)
|
|---|
| 1289 | else:
|
|---|
| 1290 | # loop over the sequence
|
|---|
| 1291 | for elt in v:
|
|---|
| 1292 | l.append(k + '=' + quote_plus(str(elt)))
|
|---|
| 1293 | return '&'.join(l)
|
|---|
| 1294 |
|
|---|
| 1295 | # Proxy handling
|
|---|
| 1296 | def getproxies_environment():
|
|---|
| 1297 | """Return a dictionary of scheme -> proxy server URL mappings.
|
|---|
| 1298 |
|
|---|
| 1299 | Scan the environment for variables named <scheme>_proxy;
|
|---|
| 1300 | this seems to be the standard convention. If you need a
|
|---|
| 1301 | different way, you can pass a proxies dictionary to the
|
|---|
| 1302 | [Fancy]URLopener constructor.
|
|---|
| 1303 |
|
|---|
| 1304 | """
|
|---|
| 1305 | proxies = {}
|
|---|
| 1306 | for name, value in os.environ.items():
|
|---|
| 1307 | name = name.lower()
|
|---|
| 1308 | if value and name[-6:] == '_proxy':
|
|---|
| 1309 | proxies[name[:-6]] = value
|
|---|
| 1310 | return proxies
|
|---|
| 1311 |
|
|---|
| 1312 | def proxy_bypass_environment(host):
|
|---|
| 1313 | """Test if proxies should not be used for a particular host.
|
|---|
| 1314 |
|
|---|
| 1315 | Checks the environment for a variable named no_proxy, which should
|
|---|
| 1316 | be a list of DNS suffixes separated by commas, or '*' for all hosts.
|
|---|
| 1317 | """
|
|---|
| 1318 | no_proxy = os.environ.get('no_proxy', '') or os.environ.get('NO_PROXY', '')
|
|---|
| 1319 | # '*' is special case for always bypass
|
|---|
| 1320 | if no_proxy == '*':
|
|---|
| 1321 | return 1
|
|---|
| 1322 | # strip port off host
|
|---|
| 1323 | hostonly, port = splitport(host)
|
|---|
| 1324 | # check if the host ends with any of the DNS suffixes
|
|---|
| 1325 | for name in no_proxy.split(','):
|
|---|
| 1326 | if name and (hostonly.endswith(name) or host.endswith(name)):
|
|---|
| 1327 | return 1
|
|---|
| 1328 | # otherwise, don't bypass
|
|---|
| 1329 | return 0
|
|---|
| 1330 |
|
|---|
| 1331 |
|
|---|
| 1332 | if sys.platform == 'darwin':
|
|---|
| 1333 | from _scproxy import _get_proxy_settings, _get_proxies
|
|---|
| 1334 |
|
|---|
| 1335 | def proxy_bypass_macosx_sysconf(host):
|
|---|
| 1336 | """
|
|---|
| 1337 | Return True iff this host shouldn't be accessed using a proxy
|
|---|
| 1338 |
|
|---|
| 1339 | This function uses the MacOSX framework SystemConfiguration
|
|---|
| 1340 | to fetch the proxy information.
|
|---|
| 1341 | """
|
|---|
| 1342 | import re
|
|---|
| 1343 | import socket
|
|---|
| 1344 | from fnmatch import fnmatch
|
|---|
| 1345 |
|
|---|
| 1346 | hostonly, port = splitport(host)
|
|---|
| 1347 |
|
|---|
| 1348 | def ip2num(ipAddr):
|
|---|
| 1349 | parts = ipAddr.split('.')
|
|---|
| 1350 | parts = map(int, parts)
|
|---|
| 1351 | if len(parts) != 4:
|
|---|
| 1352 | parts = (parts + [0, 0, 0, 0])[:4]
|
|---|
| 1353 | return (parts[0] << 24) | (parts[1] << 16) | (parts[2] << 8) | parts[3]
|
|---|
| 1354 |
|
|---|
| 1355 | proxy_settings = _get_proxy_settings()
|
|---|
| 1356 |
|
|---|
| 1357 | # Check for simple host names:
|
|---|
| 1358 | if '.' not in host:
|
|---|
| 1359 | if proxy_settings['exclude_simple']:
|
|---|
| 1360 | return True
|
|---|
| 1361 |
|
|---|
| 1362 | hostIP = None
|
|---|
| 1363 |
|
|---|
| 1364 | for value in proxy_settings.get('exceptions', ()):
|
|---|
| 1365 | # Items in the list are strings like these: *.local, 169.254/16
|
|---|
| 1366 | if not value: continue
|
|---|
| 1367 |
|
|---|
| 1368 | m = re.match(r"(\d+(?:\.\d+)*)(/\d+)?", value)
|
|---|
| 1369 | if m is not None:
|
|---|
| 1370 | if hostIP is None:
|
|---|
| 1371 | try:
|
|---|
| 1372 | hostIP = socket.gethostbyname(hostonly)
|
|---|
| 1373 | hostIP = ip2num(hostIP)
|
|---|
| 1374 | except socket.error:
|
|---|
| 1375 | continue
|
|---|
| 1376 |
|
|---|
| 1377 | base = ip2num(m.group(1))
|
|---|
| 1378 | mask = int(m.group(2)[1:])
|
|---|
| 1379 | mask = 32 - mask
|
|---|
| 1380 |
|
|---|
| 1381 | if (hostIP >> mask) == (base >> mask):
|
|---|
| 1382 | return True
|
|---|
| 1383 |
|
|---|
| 1384 | elif fnmatch(host, value):
|
|---|
| 1385 | return True
|
|---|
| 1386 |
|
|---|
| 1387 | return False
|
|---|
| 1388 |
|
|---|
| 1389 |
|
|---|
| 1390 | def getproxies_macosx_sysconf():
|
|---|
| 1391 | """Return a dictionary of scheme -> proxy server URL mappings.
|
|---|
| 1392 |
|
|---|
| 1393 | This function uses the MacOSX framework SystemConfiguration
|
|---|
| 1394 | to fetch the proxy information.
|
|---|
| 1395 | """
|
|---|
| 1396 | return _get_proxies()
|
|---|
| 1397 |
|
|---|
| 1398 |
|
|---|
| 1399 |
|
|---|
| 1400 | def proxy_bypass(host):
|
|---|
| 1401 | if getproxies_environment():
|
|---|
| 1402 | return proxy_bypass_environment(host)
|
|---|
| 1403 | else:
|
|---|
| 1404 | return proxy_bypass_macosx_sysconf(host)
|
|---|
| 1405 |
|
|---|
| 1406 | def getproxies():
|
|---|
| 1407 | return getproxies_environment() or getproxies_macosx_sysconf()
|
|---|
| 1408 |
|
|---|
| 1409 | elif os.name == 'nt':
|
|---|
| 1410 | def getproxies_registry():
|
|---|
| 1411 | """Return a dictionary of scheme -> proxy server URL mappings.
|
|---|
| 1412 |
|
|---|
| 1413 | Win32 uses the registry to store proxies.
|
|---|
| 1414 |
|
|---|
| 1415 | """
|
|---|
| 1416 | proxies = {}
|
|---|
| 1417 | try:
|
|---|
| 1418 | import _winreg
|
|---|
| 1419 | except ImportError:
|
|---|
| 1420 | # Std module, so should be around - but you never know!
|
|---|
| 1421 | return proxies
|
|---|
| 1422 | try:
|
|---|
| 1423 | internetSettings = _winreg.OpenKey(_winreg.HKEY_CURRENT_USER,
|
|---|
| 1424 | r'Software\Microsoft\Windows\CurrentVersion\Internet Settings')
|
|---|
| 1425 | proxyEnable = _winreg.QueryValueEx(internetSettings,
|
|---|
| 1426 | 'ProxyEnable')[0]
|
|---|
| 1427 | if proxyEnable:
|
|---|
| 1428 | # Returned as Unicode but problems if not converted to ASCII
|
|---|
| 1429 | proxyServer = str(_winreg.QueryValueEx(internetSettings,
|
|---|
| 1430 | 'ProxyServer')[0])
|
|---|
| 1431 | if '=' in proxyServer:
|
|---|
| 1432 | # Per-protocol settings
|
|---|
| 1433 | for p in proxyServer.split(';'):
|
|---|
| 1434 | protocol, address = p.split('=', 1)
|
|---|
| 1435 | # See if address has a type:// prefix
|
|---|
| 1436 | import re
|
|---|
| 1437 | if not re.match('^([^/:]+)://', address):
|
|---|
| 1438 | address = '%s://%s' % (protocol, address)
|
|---|
| 1439 | proxies[protocol] = address
|
|---|
| 1440 | else:
|
|---|
| 1441 | # Use one setting for all protocols
|
|---|
| 1442 | if proxyServer[:5] == 'http:':
|
|---|
| 1443 | proxies['http'] = proxyServer
|
|---|
| 1444 | else:
|
|---|
| 1445 | proxies['http'] = 'http://%s' % proxyServer
|
|---|
| 1446 | proxies['ftp'] = 'ftp://%s' % proxyServer
|
|---|
| 1447 | internetSettings.Close()
|
|---|
| 1448 | except (WindowsError, ValueError, TypeError):
|
|---|
| 1449 | # Either registry key not found etc, or the value in an
|
|---|
| 1450 | # unexpected format.
|
|---|
| 1451 | # proxies already set up to be empty so nothing to do
|
|---|
| 1452 | pass
|
|---|
| 1453 | return proxies
|
|---|
| 1454 |
|
|---|
| 1455 | def getproxies():
|
|---|
| 1456 | """Return a dictionary of scheme -> proxy server URL mappings.
|
|---|
| 1457 |
|
|---|
| 1458 | Returns settings gathered from the environment, if specified,
|
|---|
| 1459 | or the registry.
|
|---|
| 1460 |
|
|---|
| 1461 | """
|
|---|
| 1462 | return getproxies_environment() or getproxies_registry()
|
|---|
| 1463 |
|
|---|
| 1464 | def proxy_bypass_registry(host):
|
|---|
| 1465 | try:
|
|---|
| 1466 | import _winreg
|
|---|
| 1467 | import re
|
|---|
| 1468 | except ImportError:
|
|---|
| 1469 | # Std modules, so should be around - but you never know!
|
|---|
| 1470 | return 0
|
|---|
| 1471 | try:
|
|---|
| 1472 | internetSettings = _winreg.OpenKey(_winreg.HKEY_CURRENT_USER,
|
|---|
| 1473 | r'Software\Microsoft\Windows\CurrentVersion\Internet Settings')
|
|---|
| 1474 | proxyEnable = _winreg.QueryValueEx(internetSettings,
|
|---|
| 1475 | 'ProxyEnable')[0]
|
|---|
| 1476 | proxyOverride = str(_winreg.QueryValueEx(internetSettings,
|
|---|
| 1477 | 'ProxyOverride')[0])
|
|---|
| 1478 | # ^^^^ Returned as Unicode but problems if not converted to ASCII
|
|---|
| 1479 | except WindowsError:
|
|---|
| 1480 | return 0
|
|---|
| 1481 | if not proxyEnable or not proxyOverride:
|
|---|
| 1482 | return 0
|
|---|
| 1483 | # try to make a host list from name and IP address.
|
|---|
| 1484 | rawHost, port = splitport(host)
|
|---|
| 1485 | host = [rawHost]
|
|---|
| 1486 | try:
|
|---|
| 1487 | addr = socket.gethostbyname(rawHost)
|
|---|
| 1488 | if addr != rawHost:
|
|---|
| 1489 | host.append(addr)
|
|---|
| 1490 | except socket.error:
|
|---|
| 1491 | pass
|
|---|
| 1492 | try:
|
|---|
| 1493 | fqdn = socket.getfqdn(rawHost)
|
|---|
| 1494 | if fqdn != rawHost:
|
|---|
| 1495 | host.append(fqdn)
|
|---|
| 1496 | except socket.error:
|
|---|
| 1497 | pass
|
|---|
| 1498 | # make a check value list from the registry entry: replace the
|
|---|
| 1499 | # '<local>' string by the localhost entry and the corresponding
|
|---|
| 1500 | # canonical entry.
|
|---|
| 1501 | proxyOverride = proxyOverride.split(';')
|
|---|
| 1502 | i = 0
|
|---|
| 1503 | while i < len(proxyOverride):
|
|---|
| 1504 | if proxyOverride[i] == '<local>':
|
|---|
| 1505 | proxyOverride[i:i+1] = ['localhost',
|
|---|
| 1506 | '127.0.0.1',
|
|---|
| 1507 | socket.gethostname(),
|
|---|
| 1508 | socket.gethostbyname(
|
|---|
| 1509 | socket.gethostname())]
|
|---|
| 1510 | i += 1
|
|---|
| 1511 | # print proxyOverride
|
|---|
| 1512 | # now check if we match one of the registry values.
|
|---|
| 1513 | for test in proxyOverride:
|
|---|
| 1514 | test = test.replace(".", r"\.") # mask dots
|
|---|
| 1515 | test = test.replace("*", r".*") # change glob sequence
|
|---|
| 1516 | test = test.replace("?", r".") # change glob char
|
|---|
| 1517 | for val in host:
|
|---|
| 1518 | # print "%s <--> %s" %( test, val )
|
|---|
| 1519 | if re.match(test, val, re.I):
|
|---|
| 1520 | return 1
|
|---|
| 1521 | return 0
|
|---|
| 1522 |
|
|---|
| 1523 | def proxy_bypass(host):
|
|---|
| 1524 | """Return a dictionary of scheme -> proxy server URL mappings.
|
|---|
| 1525 |
|
|---|
| 1526 | Returns settings gathered from the environment, if specified,
|
|---|
| 1527 | or the registry.
|
|---|
| 1528 |
|
|---|
| 1529 | """
|
|---|
| 1530 | if getproxies_environment():
|
|---|
| 1531 | return proxy_bypass_environment(host)
|
|---|
| 1532 | else:
|
|---|
| 1533 | return proxy_bypass_registry(host)
|
|---|
| 1534 |
|
|---|
| 1535 | else:
|
|---|
| 1536 | # By default use environment variables
|
|---|
| 1537 | getproxies = getproxies_environment
|
|---|
| 1538 | proxy_bypass = proxy_bypass_environment
|
|---|
| 1539 |
|
|---|
| 1540 | # Test and time quote() and unquote()
|
|---|
| 1541 | def test1():
|
|---|
| 1542 | s = ''
|
|---|
| 1543 | for i in range(256): s = s + chr(i)
|
|---|
| 1544 | s = s*4
|
|---|
| 1545 | t0 = time.time()
|
|---|
| 1546 | qs = quote(s)
|
|---|
| 1547 | uqs = unquote(qs)
|
|---|
| 1548 | t1 = time.time()
|
|---|
| 1549 | if uqs != s:
|
|---|
| 1550 | print 'Wrong!'
|
|---|
| 1551 | print repr(s)
|
|---|
| 1552 | print repr(qs)
|
|---|
| 1553 | print repr(uqs)
|
|---|
| 1554 | print round(t1 - t0, 3), 'sec'
|
|---|
| 1555 |
|
|---|
| 1556 |
|
|---|
| 1557 | def reporthook(blocknum, blocksize, totalsize):
|
|---|
| 1558 | # Report during remote transfers
|
|---|
| 1559 | print "Block number: %d, Block size: %d, Total size: %d" % (
|
|---|
| 1560 | blocknum, blocksize, totalsize)
|
|---|
| 1561 |
|
|---|
| 1562 | # Test program
|
|---|
| 1563 | def test(args=[]):
|
|---|
| 1564 | if not args:
|
|---|
| 1565 | args = [
|
|---|
| 1566 | '/etc/passwd',
|
|---|
| 1567 | 'file:/etc/passwd',
|
|---|
| 1568 | 'file://localhost/etc/passwd',
|
|---|
| 1569 | 'ftp://ftp.gnu.org/pub/README',
|
|---|
| 1570 | 'http://www.python.org/index.html',
|
|---|
| 1571 | ]
|
|---|
| 1572 | if hasattr(URLopener, "open_https"):
|
|---|
| 1573 | args.append('https://synergy.as.cmu.edu/~geek/')
|
|---|
| 1574 | try:
|
|---|
| 1575 | for url in args:
|
|---|
| 1576 | print '-'*10, url, '-'*10
|
|---|
| 1577 | fn, h = urlretrieve(url, None, reporthook)
|
|---|
| 1578 | print fn
|
|---|
| 1579 | if h:
|
|---|
| 1580 | print '======'
|
|---|
| 1581 | for k in h.keys(): print k + ':', h[k]
|
|---|
| 1582 | print '======'
|
|---|
| 1583 | fp = open(fn, 'rb')
|
|---|
| 1584 | data = fp.read()
|
|---|
| 1585 | del fp
|
|---|
| 1586 | if '\r' in data:
|
|---|
| 1587 | table = string.maketrans("", "")
|
|---|
| 1588 | data = data.translate(table, "\r")
|
|---|
| 1589 | print data
|
|---|
| 1590 | fn, h = None, None
|
|---|
| 1591 | print '-'*40
|
|---|
| 1592 | finally:
|
|---|
| 1593 | urlcleanup()
|
|---|
| 1594 |
|
|---|
| 1595 | def main():
|
|---|
| 1596 | import getopt, sys
|
|---|
| 1597 | try:
|
|---|
| 1598 | opts, args = getopt.getopt(sys.argv[1:], "th")
|
|---|
| 1599 | except getopt.error, msg:
|
|---|
| 1600 | print msg
|
|---|
| 1601 | print "Use -h for help"
|
|---|
| 1602 | return
|
|---|
| 1603 | t = 0
|
|---|
| 1604 | for o, a in opts:
|
|---|
| 1605 | if o == '-t':
|
|---|
| 1606 | t = t + 1
|
|---|
| 1607 | if o == '-h':
|
|---|
| 1608 | print "Usage: python urllib.py [-t] [url ...]"
|
|---|
| 1609 | print "-t runs self-test;",
|
|---|
| 1610 | print "otherwise, contents of urls are printed"
|
|---|
| 1611 | return
|
|---|
| 1612 | if t:
|
|---|
| 1613 | if t > 1:
|
|---|
| 1614 | test1()
|
|---|
| 1615 | test(args)
|
|---|
| 1616 | else:
|
|---|
| 1617 | if not args:
|
|---|
| 1618 | print "Use -h for help"
|
|---|
| 1619 | for url in args:
|
|---|
| 1620 | print urlopen(url).read(),
|
|---|
| 1621 |
|
|---|
| 1622 | # Run test program when run as a script
|
|---|
| 1623 | if __name__ == '__main__':
|
|---|
| 1624 | main()
|
|---|
