FM / python2.6

/usr/lib/python2.6

Name	Size	Mode	Actions
bsddb/	-	0755	rm
compiler/	-	0755	rm
config/	-	0755	rm
ctypes/	-	0755	rm
curses/	-	0755	rm
distutils/	-	0755	rm
email/	-	0755	rm
encodings/	-	0755	rm
hotshot/	-	0755	rm
idlelib/	-	0755	rm
json/	-	0755	rm
lib-dynload/	-	0755	rm
lib2to3/	-	0755	rm
logging/	-	0755	rm
multiprocessing/	-	0755	rm
plat-linux2/	-	0755	rm
site-packages/	-	0755	rm
sqlite3/	-	0755	rm
test/	-	0755	rm
wsgiref/	-	0755	rm
xml/	-	0755	rm
abc.py	7034	0644	edit dl rm
abc.pyc	6049	0644	edit dl rm
abc.pyo	5991	0644	edit dl rm
aifc.py	33188	0644	edit dl rm
aifc.pyc	29424	0644	edit dl rm
aifc.pyo	29424	0644	edit dl rm
anydbm.py	2620	0644	edit dl rm
anydbm.pyc	2769	0644	edit dl rm
anydbm.pyo	2769	0644	edit dl rm
ast.py	11347	0644	edit dl rm
ast.pyc	12732	0644	edit dl rm
ast.pyo	12732	0644	edit dl rm
asynchat.py	11402	0644	edit dl rm
asynchat.pyc	8677	0644	edit dl rm
asynchat.pyo	8677	0644	edit dl rm
asyncore.py	20061	0644	edit dl rm
asyncore.pyc	18334	0644	edit dl rm
asyncore.pyo	18334	0644	edit dl rm
atexit.py	1705	0644	edit dl rm
atexit.pyc	2203	0644	edit dl rm
atexit.pyo	2203	0644	edit dl rm
audiodev.py	7597	0644	edit dl rm
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audiodev.pyo	8483	0644	edit dl rm
base64.py	11335	0755	edit dl rm
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BaseHTTPServer.py	21974	0644	edit dl rm
BaseHTTPServer.pyc	21535	0644	edit dl rm
BaseHTTPServer.pyo	21535	0644	edit dl rm
Bastion.py	5744	0644	edit dl rm
Bastion.pyc	6637	0644	edit dl rm
Bastion.pyo	6637	0644	edit dl rm
bdb.py	20597	0644	edit dl rm
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bdb.pyo	18449	0644	edit dl rm
binhex.py	14878	0644	edit dl rm
binhex.pyc	15773	0644	edit dl rm
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bisect.py	2662	0644	edit dl rm
bisect.pyc	3163	0644	edit dl rm
bisect.pyo	3163	0644	edit dl rm
calendar.py	23110	0644	edit dl rm
calendar.pyc	28007	0644	edit dl rm
calendar.pyo	28007	0644	edit dl rm
cgi.py	34478	0755	edit dl rm
cgi.pyc	32680	0644	edit dl rm
cgi.pyo	32680	0644	edit dl rm
CGIHTTPServer.py	12773	0644	edit dl rm
CGIHTTPServer.pyc	10794	0644	edit dl rm
CGIHTTPServer.pyo	10794	0644	edit dl rm
cgitb.py	12155	0644	edit dl rm
cgitb.pyc	12425	0644	edit dl rm
cgitb.pyo	12425	0644	edit dl rm
chunk.py	5372	0644	edit dl rm
chunk.pyc	5623	0644	edit dl rm
chunk.pyo	5623	0644	edit dl rm
cmd.py	14962	0644	edit dl rm
cmd.pyc	13914	0644	edit dl rm
cmd.pyo	13914	0644	edit dl rm
code.py	10217	0644	edit dl rm
code.pyc	10395	0644	edit dl rm
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codecs.py	35266	0644	edit dl rm
codecs.pyc	36533	0644	edit dl rm
codecs.pyo	36533	0644	edit dl rm
codeop.py	5999	0644	edit dl rm
codeop.pyc	6616	0644	edit dl rm
codeop.pyo	6616	0644	edit dl rm
collections.py	13730	0644	edit dl rm
collections.pyc	14392	0644	edit dl rm
collections.pyo	14339	0644	edit dl rm
colorsys.py	3459	0644	edit dl rm
colorsys.pyc	4025	0644	edit dl rm
colorsys.pyo	4025	0644	edit dl rm
commands.py	2543	0644	edit dl rm
commands.pyc	2477	0644	edit dl rm
commands.pyo	2477	0644	edit dl rm
compileall.py	5285	0644	edit dl rm
compileall.pyc	4989	0644	edit dl rm
compileall.pyo	4989	0644	edit dl rm
ConfigParser.py	25989	0644	edit dl rm
ConfigParser.pyc	23755	0644	edit dl rm
ConfigParser.pyo	23755	0644	edit dl rm
contextlib.py	4136	0644	edit dl rm
contextlib.pyc	4127	0644	edit dl rm
contextlib.pyo	4127	0644	edit dl rm
Cookie.py	25054	0644	edit dl rm
Cookie.pyc	22067	0644	edit dl rm
Cookie.pyo	22067	0644	edit dl rm
cookielib.py	64726	0644	edit dl rm
cookielib.pyc	55176	0644	edit dl rm
cookielib.pyo	54985	0644	edit dl rm
copy.py	11177	0644	edit dl rm
copy.pyc	11629	0644	edit dl rm
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copy_reg.py	6800	0644	edit dl rm
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copy_reg.pyo	5110	0644	edit dl rm
cProfile.py	6337	0755	edit dl rm
cProfile.pyc	6211	0644	edit dl rm
cProfile.pyo	6211	0644	edit dl rm
crypt.py	2229	0644	edit dl rm
crypt.pyc	3043	0644	edit dl rm
crypt.pyo	3043	0644	edit dl rm
csv.py	15730	0644	edit dl rm
csv.pyc	13170	0644	edit dl rm
csv.pyo	13170	0644	edit dl rm
dbhash.py	535	0644	edit dl rm
dbhash.pyc	756	0644	edit dl rm
dbhash.pyo	756	0644	edit dl rm
decimal.py	199273	0644	edit dl rm
decimal.pyc	155185	0644	edit dl rm
decimal.pyo	155119	0644	edit dl rm
difflib.py	81080	0644	edit dl rm
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dircache.py	1126	0644	edit dl rm
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dis.py	6449	0644	edit dl rm
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dis.pyo	6350	0644	edit dl rm
doctest.py	101516	0644	edit dl rm
doctest.pyc	80782	0644	edit dl rm
doctest.pyo	80494	0644	edit dl rm
DocXMLRPCServer.py	10599	0644	edit dl rm
DocXMLRPCServer.pyc	9921	0644	edit dl rm
DocXMLRPCServer.pyo	9813	0644	edit dl rm
dumbdbm.py	8820	0644	edit dl rm
dumbdbm.pyc	6547	0644	edit dl rm
dumbdbm.pyo	6547	0644	edit dl rm
dummy_thread.py	4418	0644	edit dl rm
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dummy_threading.py	2804	0644	edit dl rm
dummy_threading.pyc	1295	0644	edit dl rm
dummy_threading.pyo	1295	0644	edit dl rm
filecmp.py	9470	0644	edit dl rm
filecmp.pyc	9592	0644	edit dl rm
filecmp.pyo	9592	0644	edit dl rm
fileinput.py	14143	0644	edit dl rm
fileinput.pyc	14870	0644	edit dl rm
fileinput.pyo	14870	0644	edit dl rm
fnmatch.py	3239	0644	edit dl rm
fnmatch.pyc	3567	0644	edit dl rm
fnmatch.pyo	3567	0644	edit dl rm
formatter.py	14911	0644	edit dl rm
formatter.pyc	19149	0644	edit dl rm
formatter.pyo	19149	0644	edit dl rm
fpformat.py	4699	0644	edit dl rm
fpformat.pyc	4719	0644	edit dl rm
fpformat.pyo	4719	0644	edit dl rm
fractions.py	20073	0644	edit dl rm
fractions.pyc	18041	0644	edit dl rm
fractions.pyo	18041	0644	edit dl rm
ftplib.py	29197	0644	edit dl rm
ftplib.pyc	28387	0644	edit dl rm
ftplib.pyo	28387	0644	edit dl rm
functools.py	2162	0644	edit dl rm
functools.pyc	1921	0644	edit dl rm
functools.pyo	1921	0644	edit dl rm
genericpath.py	3020	0644	edit dl rm
genericpath.pyc	3272	0644	edit dl rm
genericpath.pyo	3272	0644	edit dl rm
getopt.py	7328	0644	edit dl rm
getopt.pyc	6710	0644	edit dl rm
getopt.pyo	6663	0644	edit dl rm
getpass.py	5534	0644	edit dl rm
getpass.pyc	4740	0644	edit dl rm
getpass.pyo	4740	0644	edit dl rm
gettext.py	19968	0644	edit dl rm
gettext.pyc	15674	0644	edit dl rm
gettext.pyo	15674	0644	edit dl rm
glob.py	2249	0644	edit dl rm
glob.pyc	2395	0644	edit dl rm
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gzip.py	16754	0644	edit dl rm
gzip.pyc	14322	0644	edit dl rm
gzip.pyo	14322	0644	edit dl rm
hashlib.py	4427	0644	edit dl rm
hashlib.pyc	3975	0644	edit dl rm
hashlib.pyo	3975	0644	edit dl rm
heapq.py	15995	0644	edit dl rm
heapq.pyc	12668	0644	edit dl rm
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hmac.py	4531	0644	edit dl rm
hmac.pyc	4489	0644	edit dl rm
hmac.pyo	4489	0644	edit dl rm
htmlentitydefs.py	18054	0644	edit dl rm
htmlentitydefs.pyc	6369	0644	edit dl rm
htmlentitydefs.pyo	6369	0644	edit dl rm
htmllib.py	12869	0644	edit dl rm
htmllib.pyc	20202	0644	edit dl rm
htmllib.pyo	20202	0644	edit dl rm
HTMLParser.py	13576	0644	edit dl rm
HTMLParser.pyc	12198	0644	edit dl rm
HTMLParser.pyo	11890	0644	edit dl rm
httplib.py	48797	0644	edit dl rm
httplib.pyc	37578	0644	edit dl rm
httplib.pyo	37382	0644	edit dl rm
ihooks.py	17452	0644	edit dl rm
ihooks.pyc	20699	0644	edit dl rm
ihooks.pyo	20620	0644	edit dl rm
imaplib.py	47771	0644	edit dl rm
imaplib.pyc	45027	0644	edit dl rm
imaplib.pyo	42287	0644	edit dl rm
imghdr.py	3544	0644	edit dl rm
imghdr.pyc	4873	0644	edit dl rm
imghdr.pyo	4873	0644	edit dl rm
imputil.py	26009	0644	edit dl rm
imputil.pyc	15959	0644	edit dl rm
imputil.pyo	15787	0644	edit dl rm
inspect.py	38189	0644	edit dl rm
inspect.pyc	37033	0644	edit dl rm
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io.py	66165	0644	edit dl rm
io.pyc	62712	0644	edit dl rm
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keyword.py	1997	0755	edit dl rm
keyword.pyc	2113	0644	edit dl rm
keyword.pyo	2113	0644	edit dl rm
linecache.py	4128	0644	edit dl rm
linecache.pyc	3256	0644	edit dl rm
linecache.pyo	3256	0644	edit dl rm
locale.py	82674	0644	edit dl rm
locale.pyc	46620	0644	edit dl rm
locale.pyo	46620	0644	edit dl rm
macpath.py	6253	0644	edit dl rm
macpath.pyc	7669	0644	edit dl rm
macpath.pyo	7669	0644	edit dl rm
macurl2path.py	3275	0644	edit dl rm
macurl2path.pyc	2815	0644	edit dl rm
macurl2path.pyo	2815	0644	edit dl rm
mailbox.py	75824	0644	edit dl rm
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mailcap.py	8402	0644	edit dl rm
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markupbase.py	14350	0644	edit dl rm
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md5.py	410	0644	edit dl rm
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mhlib.py	33434	0644	edit dl rm
mhlib.pyc	33981	0644	edit dl rm
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mimetools.py	7168	0644	edit dl rm
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mimetypes.py	18822	0644	edit dl rm
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MimeWriter.py	6482	0644	edit dl rm
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mimify.py	15024	0755	edit dl rm
mimify.pyc	12189	0644	edit dl rm
mimify.pyo	12189	0644	edit dl rm
modulefinder.py	24283	0644	edit dl rm
modulefinder.pyc	18939	0644	edit dl rm
modulefinder.pyo	18851	0644	edit dl rm
multifile.py	4820	0644	edit dl rm
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mutex.py	1866	0644	edit dl rm
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netrc.py	4111	0644	edit dl rm
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new.py	706	0644	edit dl rm
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nntplib.py	21470	0644	edit dl rm
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ntpath.py	17752	0644	edit dl rm
ntpath.pyc	11582	0644	edit dl rm
ntpath.pyo	11535	0644	edit dl rm
nturl2path.py	2239	0644	edit dl rm
nturl2path.pyc	1771	0644	edit dl rm
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numbers.py	10271	0644	edit dl rm
numbers.pyc	13840	0644	edit dl rm
numbers.pyo	13840	0644	edit dl rm
opcode.py	5248	0644	edit dl rm
opcode.pyc	5907	0644	edit dl rm
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optparse.py	60849	0644	edit dl rm
optparse.pyc	53959	0644	edit dl rm
optparse.pyo	53877	0644	edit dl rm
ordereddict.py	36	0644	edit dl rm
ordereddict.pyc	183	0644	edit dl rm
ordereddict.pyo	183	0644	edit dl rm
os.py	25802	0644	edit dl rm
os.pyc	25702	0644	edit dl rm
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os2emxpath.py	4603	0644	edit dl rm
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pdb.doc	7899	0644	edit dl rm
pdb.py	45333	0755	edit dl rm
pdb.pyc	43585	0644	edit dl rm
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pickle.py	44811	0644	edit dl rm
pickle.pyc	38437	0644	edit dl rm
pickle.pyo	38232	0644	edit dl rm
pickletools.py	74348	0644	edit dl rm
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pipes.py	9647	0644	edit dl rm
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pkgutil.py	20001	0644	edit dl rm
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platform.py	52630	0755	edit dl rm
platform.pyc	38699	0644	edit dl rm
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plistlib.py	15806	0644	edit dl rm
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popen2.py	8416	0644	edit dl rm
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poplib.py	12825	0644	edit dl rm
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posixfile.py	8003	0644	edit dl rm
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posixpath.py	13119	0644	edit dl rm
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pprint.py	11932	0644	edit dl rm
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profile.py	23510	0755	edit dl rm
profile.pyc	16600	0644	edit dl rm
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pstats.py	27310	0644	edit dl rm
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pty.py	4869	0644	edit dl rm
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pyclbr.py	13282	0644	edit dl rm
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pydoc.py	92432	0755	edit dl rm
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pydoc_topics.py	423126	0644	edit dl rm
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py_compile.py	5633	0644	edit dl rm
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Queue.py	8574	0644	edit dl rm
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quopri.py	6972	0755	edit dl rm
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rlcompleter.py	5866	0644	edit dl rm
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sched.py	5091	0644	edit dl rm
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sets.py	19050	0644	edit dl rm
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sha.py	445	0644	edit dl rm
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SimpleXMLRPCServer.py	21992	0644	edit dl rm
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site.py	18927	0644	edit dl rm
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sndhdr.py	5973	0644	edit dl rm
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socket.py	20149	0644	edit dl rm
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SocketServer.py	22326	0644	edit dl rm
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Edit: /usr/lib/python2.6/urllib.py (59022B)

"""Open an arbitrary URL.

See the following document for more info on URLs:
"Names and Addresses, URIs, URLs, URNs, URCs", at
http://www.w3.org/pub/WWW/Addressing/Overview.html

See also the HTTP spec (from which the error codes are derived):
"HTTP - Hypertext Transfer Protocol", at
http://www.w3.org/pub/WWW/Protocols/

Related standards and specs:
- RFC1808: the "relative URL" spec. (authoritative status)
- RFC1738 - the "URL standard". (authoritative status)
- RFC1630 - the "URI spec". (informational status)

The object returned by URLopener().open(file) will differ per
protocol.  All you know is that is has methods read(), readline(),
readlines(), fileno(), close() and info().  The read*(), fileno()
and close() methods work like those of open files.
The info() method returns a mimetools.Message object which can be
used to query various info about the object, if available.
(mimetools.Message objects are queried with the getheader() method.)
"""

import string
import socket
import os
import time
import sys
from urlparse import urljoin as basejoin

__all__ = ["urlopen", "URLopener", "FancyURLopener", "urlretrieve",
           "urlcleanup", "quote", "quote_plus", "unquote", "unquote_plus",
           "urlencode", "url2pathname", "pathname2url", "splittag",
           "localhost", "thishost", "ftperrors", "basejoin", "unwrap",
           "splittype", "splithost", "splituser", "splitpasswd", "splitport",
           "splitnport", "splitquery", "splitattr", "splitvalue",
           "getproxies"]

__version__ = '1.17'    # XXX This version is not always updated :-(

MAXFTPCACHE = 10        # Trim the ftp cache beyond this size

# Helper for non-unix systems
if os.name == 'mac':
    from macurl2path import url2pathname, pathname2url
elif os.name == 'nt':
    from nturl2path import url2pathname, pathname2url
elif os.name == 'riscos':
    from rourl2path import url2pathname, pathname2url
else:
    def url2pathname(pathname):
        """OS-specific conversion from a relative URL of the 'file' scheme
        to a file system path; not recommended for general use."""
        return unquote(pathname)

def pathname2url(pathname):
        """OS-specific conversion from a file system path to a relative URL
        of the 'file' scheme; not recommended for general use."""
        return quote(pathname)

# This really consists of two pieces:
# (1) a class which handles opening of all sorts of URLs
#     (plus assorted utilities etc.)
# (2) a set of functions for parsing URLs
# XXX Should these be separated out into different modules?

# Shortcut for basic usage
_urlopener = None
def urlopen(url, data=None, proxies=None):
    """Create a file-like object for the specified URL to read from."""
    from warnings import warnpy3k
    warnpy3k("urllib.urlopen() has been removed in Python 3.0 in "
             "favor of urllib2.urlopen()", stacklevel=2)

global _urlopener
    if proxies is not None:
        opener = FancyURLopener(proxies=proxies)
    elif not _urlopener:
        opener = FancyURLopener()
        _urlopener = opener
    else:
        opener = _urlopener
    if data is None:
        return opener.open(url)
    else:
        return opener.open(url, data)
def urlretrieve(url, filename=None, reporthook=None, data=None):
    global _urlopener
    if not _urlopener:
        _urlopener = FancyURLopener()
    return _urlopener.retrieve(url, filename, reporthook, data)
def urlcleanup():
    if _urlopener:
        _urlopener.cleanup()
    _safemaps.clear()
    ftpcache.clear()

# check for SSL
try:
    import ssl
except:
    _have_ssl = False
else:
    _have_ssl = True

# exception raised when downloaded size does not match content-length
class ContentTooShortError(IOError):
    def __init__(self, message, content):
        IOError.__init__(self, message)
        self.content = content

ftpcache = {}
class URLopener:
    """Class to open URLs.
    This is a class rather than just a subroutine because we may need
    more than one set of global protocol-specific options.
    Note -- this is a base class for those who don't want the
    automatic handling of errors type 302 (relocated) and 401
    (authorization needed)."""

__tempfiles = None

version = "Python-urllib/%s" % __version__

# Constructor
    def __init__(self, proxies=None, **x509):
        if proxies is None:
            proxies = getproxies()
        assert hasattr(proxies, 'has_key'), "proxies must be a mapping"
        self.proxies = proxies
        self.key_file = x509.get('key_file')
        self.cert_file = x509.get('cert_file')
        self.addheaders = [('User-Agent', self.version)]
        self.__tempfiles = []
        self.__unlink = os.unlink # See cleanup()
        self.tempcache = None
        # Undocumented feature: if you assign {} to tempcache,
        # it is used to cache files retrieved with
        # self.retrieve().  This is not enabled by default
        # since it does not work for changing documents (and I
        # haven't got the logic to check expiration headers
        # yet).
        self.ftpcache = ftpcache
        # Undocumented feature: you can use a different
        # ftp cache by assigning to the .ftpcache member;
        # in case you want logically independent URL openers
        # XXX This is not threadsafe.  Bah.

def __del__(self):
        self.close()

def close(self):
        self.cleanup()

def cleanup(self):
        # This code sometimes runs when the rest of this module
        # has already been deleted, so it can't use any globals
        # or import anything.
        if self.__tempfiles:
            for file in self.__tempfiles:
                try:
                    self.__unlink(file)
                except OSError:
                    pass
            del self.__tempfiles[:]
        if self.tempcache:
            self.tempcache.clear()

def addheader(self, *args):
        """Add a header to be used by the HTTP interface only
        e.g. u.addheader('Accept', 'sound/basic')"""
        self.addheaders.append(args)

# External interface
    def open(self, fullurl, data=None):
        """Use URLopener().open(file) instead of open(file, 'r')."""
        fullurl = unwrap(toBytes(fullurl))
        # percent encode url. fixing lame server errors like space within url
        # parts
        fullurl = quote(fullurl, safe="%/:=&?~#+!$,;'@()*[]|")
        if self.tempcache and fullurl in self.tempcache:
            filename, headers = self.tempcache[fullurl]
            fp = open(filename, 'rb')
            return addinfourl(fp, headers, fullurl)
        urltype, url = splittype(fullurl)
        if not urltype:
            urltype = 'file'
        if urltype in self.proxies:
            proxy = self.proxies[urltype]
            urltype, proxyhost = splittype(proxy)
            host, selector = splithost(proxyhost)
            url = (host, fullurl) # Signal special case to open_*()
        else:
            proxy = None
        name = 'open_' + urltype
        self.type = urltype
        name = name.replace('-', '_')
        if not hasattr(self, name):
            if proxy:
                return self.open_unknown_proxy(proxy, fullurl, data)
            else:
                return self.open_unknown(fullurl, data)
        try:
            if data is None:
                return getattr(self, name)(url)
            else:
                return getattr(self, name)(url, data)
        except socket.error, msg:
            raise IOError, ('socket error', msg), sys.exc_info()[2]

def open_unknown(self, fullurl, data=None):
        """Overridable interface to open unknown URL type."""
        type, url = splittype(fullurl)
        raise IOError, ('url error', 'unknown url type', type)

def open_unknown_proxy(self, proxy, fullurl, data=None):
        """Overridable interface to open unknown URL type."""
        type, url = splittype(fullurl)
        raise IOError, ('url error', 'invalid proxy for %s' % type, proxy)

# External interface
    def retrieve(self, url, filename=None, reporthook=None, data=None):
        """retrieve(url) returns (filename, headers) for a local object
        or (tempfilename, headers) for a remote object."""
        url = unwrap(toBytes(url))
        if self.tempcache and url in self.tempcache:
            return self.tempcache[url]
        type, url1 = splittype(url)
        if filename is None and (not type or type == 'file'):
            try:
                fp = self.open_local_file(url1)
                hdrs = fp.info()
                del fp
                return url2pathname(splithost(url1)[1]), hdrs
            except IOError, msg:
                pass
        fp = self.open(url, data)
        try:
            headers = fp.info()
            if filename:
                tfp = open(filename, 'wb')
            else:
                import tempfile
                garbage, path = splittype(url)
                garbage, path = splithost(path or "")
                path, garbage = splitquery(path or "")
                path, garbage = splitattr(path or "")
                suffix = os.path.splitext(path)[1]
                (fd, filename) = tempfile.mkstemp(suffix)
                self.__tempfiles.append(filename)
                tfp = os.fdopen(fd, 'wb')
            try:
                result = filename, headers
                if self.tempcache is not None:
                    self.tempcache[url] = result
                bs = 1024*8
                size = -1
                read = 0
                blocknum = 0
                if reporthook:
                    if "content-length" in headers:
                        size = int(headers["Content-Length"])
                    reporthook(blocknum, bs, size)
                while 1:
                    block = fp.read(bs)
                    if block == "":
                        break
                    read += len(block)
                    tfp.write(block)
                    blocknum += 1
                    if reporthook:
                        reporthook(blocknum, bs, size)
            finally:
                tfp.close()
        finally:
            fp.close()
        del fp
        del tfp

# raise exception if actual size does not match content-length header
        if size >= 0 and read < size:
            raise ContentTooShortError("retrieval incomplete: got only %i out "
                                       "of %i bytes" % (read, size), result)

return result

# Each method named open_<type> knows how to open that type of URL

def open_http(self, url, data=None):
        """Use HTTP protocol."""
        import httplib
        user_passwd = None
        proxy_passwd= None
        if isinstance(url, str):
            host, selector = splithost(url)
            if host:
                user_passwd, host = splituser(host)
                host = unquote(host)
            realhost = host
        else:
            host, selector = url
            # check whether the proxy contains authorization information
            proxy_passwd, host = splituser(host)
            # now we proceed with the url we want to obtain
            urltype, rest = splittype(selector)
            url = rest
            user_passwd = None
            if urltype.lower() != 'http':
                realhost = None
            else:
                realhost, rest = splithost(rest)
                if realhost:
                    user_passwd, realhost = splituser(realhost)
                if user_passwd:
                    selector = "%s://%s%s" % (urltype, realhost, rest)
                if proxy_bypass(realhost):
                    host = realhost

#print "proxy via http:", host, selector
        if not host: raise IOError, ('http error', 'no host given')

if proxy_passwd:
            import base64
            proxy_auth = base64.b64encode(proxy_passwd).strip()
        else:
            proxy_auth = None

if user_passwd:
            import base64
            auth = base64.b64encode(user_passwd).strip()
        else:
            auth = None
        h = httplib.HTTP(host)
        if data is not None:
            h.putrequest('POST', selector)
            h.putheader('Content-Type', 'application/x-www-form-urlencoded')
            h.putheader('Content-Length', '%d' % len(data))
        else:
            h.putrequest('GET', selector)
        if proxy_auth: h.putheader('Proxy-Authorization', 'Basic %s' % proxy_auth)
        if auth: h.putheader('Authorization', 'Basic %s' % auth)
        if realhost: h.putheader('Host', realhost)
        for args in self.addheaders: h.putheader(*args)
        h.endheaders()
        if data is not None:
            h.send(data)
        errcode, errmsg, headers = h.getreply()
        fp = h.getfile()
        if errcode == -1:
            if fp: fp.close()
            # something went wrong with the HTTP status line
            raise IOError, ('http protocol error', 0,
                            'got a bad status line', None)
        # According to RFC 2616, "2xx" code indicates that the client's
        # request was successfully received, understood, and accepted.
        if (200 <= errcode < 300):
            return addinfourl(fp, headers, "http:" + url, errcode)
        else:
            if data is None:
                return self.http_error(url, fp, errcode, errmsg, headers)
            else:
                return self.http_error(url, fp, errcode, errmsg, headers, data)

def http_error(self, url, fp, errcode, errmsg, headers, data=None):
        """Handle http errors.
        Derived class can override this, or provide specific handlers
        named http_error_DDD where DDD is the 3-digit error code."""
        # First check if there's a specific handler for this error
        name = 'http_error_%d' % errcode
        if hasattr(self, name):
            method = getattr(self, name)
            if data is None:
                result = method(url, fp, errcode, errmsg, headers)
            else:
                result = method(url, fp, errcode, errmsg, headers, data)
            if result: return result
        return self.http_error_default(url, fp, errcode, errmsg, headers)

def http_error_default(self, url, fp, errcode, errmsg, headers):
        """Default error handler: close the connection and raise IOError."""
        void = fp.read()
        fp.close()
        raise IOError, ('http error', errcode, errmsg, headers)

if _have_ssl:
        def open_https(self, url, data=None):
            """Use HTTPS protocol."""

import httplib
            user_passwd = None
            proxy_passwd = None
            if isinstance(url, str):
                host, selector = splithost(url)
                if host:
                    user_passwd, host = splituser(host)
                    host = unquote(host)
                realhost = host
            else:
                host, selector = url
                # here, we determine, whether the proxy contains authorization information
                proxy_passwd, host = splituser(host)
                urltype, rest = splittype(selector)
                url = rest
                user_passwd = None
                if urltype.lower() != 'https':
                    realhost = None
                else:
                    realhost, rest = splithost(rest)
                    if realhost:
                        user_passwd, realhost = splituser(realhost)
                    if user_passwd:
                        selector = "%s://%s%s" % (urltype, realhost, rest)
                #print "proxy via https:", host, selector
            if not host: raise IOError, ('https error', 'no host given')
            if proxy_passwd:
                import base64
                proxy_auth = base64.b64encode(proxy_passwd).strip()
            else:
                proxy_auth = None
            if user_passwd:
                import base64
                auth = base64.b64encode(user_passwd).strip()
            else:
                auth = None
            h = httplib.HTTPS(host, 0,
                              key_file=self.key_file,
                              cert_file=self.cert_file)
            if data is not None:
                h.putrequest('POST', selector)
                h.putheader('Content-Type',
                            'application/x-www-form-urlencoded')
                h.putheader('Content-Length', '%d' % len(data))
            else:
                h.putrequest('GET', selector)
            if proxy_auth: h.putheader('Proxy-Authorization', 'Basic %s' % proxy_auth)
            if auth: h.putheader('Authorization', 'Basic %s' % auth)
            if realhost: h.putheader('Host', realhost)
            for args in self.addheaders: h.putheader(*args)
            h.endheaders()
            if data is not None:
                h.send(data)
            errcode, errmsg, headers = h.getreply()
            fp = h.getfile()
            if errcode == -1:
                if fp: fp.close()
                # something went wrong with the HTTP status line
                raise IOError, ('http protocol error', 0,
                                'got a bad status line', None)
            # According to RFC 2616, "2xx" code indicates that the client's
            # request was successfully received, understood, and accepted.
            if (200 <= errcode < 300):
                return addinfourl(fp, headers, "https:" + url, errcode)
            else:
                if data is None:
                    return self.http_error(url, fp, errcode, errmsg, headers)
                else:
                    return self.http_error(url, fp, errcode, errmsg, headers,
                                           data)

def open_file(self, url):
        """Use local file or FTP depending on form of URL."""
        if not isinstance(url, str):
            raise IOError, ('file error', 'proxy support for file protocol currently not implemented')
        if url[:2] == '//' and url[2:3] != '/' and url[2:12].lower() != 'localhost/':
            return self.open_ftp(url)
        else:
            return self.open_local_file(url)

def open_local_file(self, url):
        """Use local file."""
        import mimetypes, mimetools, email.utils
        try:
            from cStringIO import StringIO
        except ImportError:
            from StringIO import StringIO
        host, file = splithost(url)
        localname = url2pathname(file)
        try:
            stats = os.stat(localname)
        except OSError, e:
            raise IOError(e.errno, e.strerror, e.filename)
        size = stats.st_size
        modified = email.utils.formatdate(stats.st_mtime, usegmt=True)
        mtype = mimetypes.guess_type(url)[0]
        headers = mimetools.Message(StringIO(
            'Content-Type: %s\nContent-Length: %d\nLast-modified: %s\n' %
            (mtype or 'text/plain', size, modified)))
        if not host:
            urlfile = file
            if file[:1] == '/':
                urlfile = 'file://' + file
            return addinfourl(open(localname, 'rb'),
                              headers, urlfile)
        host, port = splitport(host)
        if not port \
           and socket.gethostbyname(host) in (localhost(), thishost()):
            urlfile = file
            if file[:1] == '/':
                urlfile = 'file://' + file
            return addinfourl(open(localname, 'rb'),
                              headers, urlfile)
        raise IOError, ('local file error', 'not on local host')

def open_ftp(self, url):
        """Use FTP protocol."""
        if not isinstance(url, str):
            raise IOError, ('ftp error', 'proxy support for ftp protocol currently not implemented')
        import mimetypes, mimetools
        try:
            from cStringIO import StringIO
        except ImportError:
            from StringIO import StringIO
        host, path = splithost(url)
        if not host: raise IOError, ('ftp error', 'no host given')
        host, port = splitport(host)
        user, host = splituser(host)
        if user: user, passwd = splitpasswd(user)
        else: passwd = None
        host = unquote(host)
        user = unquote(user or '')
        passwd = unquote(passwd or '')
        host = socket.gethostbyname(host)
        if not port:
            import ftplib
            port = ftplib.FTP_PORT
        else:
            port = int(port)
        path, attrs = splitattr(path)
        path = unquote(path)
        dirs = path.split('/')
        dirs, file = dirs[:-1], dirs[-1]
        if dirs and not dirs[0]: dirs = dirs[1:]
        if dirs and not dirs[0]: dirs[0] = '/'
        key = user, host, port, '/'.join(dirs)
        # XXX thread unsafe!
        if len(self.ftpcache) > MAXFTPCACHE:
            # Prune the cache, rather arbitrarily
            for k in self.ftpcache.keys():
                if k != key:
                    v = self.ftpcache[k]
                    del self.ftpcache[k]
                    v.close()
        try:
            if not key in self.ftpcache:
                self.ftpcache[key] = \
                    ftpwrapper(user, passwd, host, port, dirs)
            if not file: type = 'D'
            else: type = 'I'
            for attr in attrs:
                attr, value = splitvalue(attr)
                if attr.lower() == 'type' and \
                   value in ('a', 'A', 'i', 'I', 'd', 'D'):
                    type = value.upper()
            (fp, retrlen) = self.ftpcache[key].retrfile(file, type)
            mtype = mimetypes.guess_type("ftp:" + url)[0]
            headers = ""
            if mtype:
                headers += "Content-Type: %s\n" % mtype
            if retrlen is not None and retrlen >= 0:
                headers += "Content-Length: %d\n" % retrlen
            headers = mimetools.Message(StringIO(headers))
            return addinfourl(fp, headers, "ftp:" + url)
        except ftperrors(), msg:
            raise IOError, ('ftp error', msg), sys.exc_info()[2]

def open_data(self, url, data=None):
        """Use "data" URL."""
        if not isinstance(url, str):
            raise IOError, ('data error', 'proxy support for data protocol currently not implemented')
        # ignore POSTed data
        #
        # syntax of data URLs:
        # dataurl   := "data:" [ mediatype ] [ ";base64" ] "," data
        # mediatype := [ type "/" subtype ] *( ";" parameter )
        # data      := *urlchar
        # parameter := attribute "=" value
        import mimetools
        try:
            from cStringIO import StringIO
        except ImportError:
            from StringIO import StringIO
        try:
            [type, data] = url.split(',', 1)
        except ValueError:
            raise IOError, ('data error', 'bad data URL')
        if not type:
            type = 'text/plain;charset=US-ASCII'
        semi = type.rfind(';')
        if semi >= 0 and '=' not in type[semi:]:
            encoding = type[semi+1:]
            type = type[:semi]
        else:
            encoding = ''
        msg = []
        msg.append('Date: %s'%time.strftime('%a, %d %b %Y %H:%M:%S GMT',
                                            time.gmtime(time.time())))
        msg.append('Content-type: %s' % type)
        if encoding == 'base64':
            import base64
            data = base64.decodestring(data)
        else:
            data = unquote(data)
        msg.append('Content-Length: %d' % len(data))
        msg.append('')
        msg.append(data)
        msg = '\n'.join(msg)
        f = StringIO(msg)
        headers = mimetools.Message(f, 0)
        #f.fileno = None     # needed for addinfourl
        return addinfourl(f, headers, url)

class FancyURLopener(URLopener):
    """Derived class with handlers for errors we can handle (perhaps)."""

def __init__(self, *args, **kwargs):
        URLopener.__init__(self, *args, **kwargs)
        self.auth_cache = {}
        self.tries = 0
        self.maxtries = 10

def http_error_default(self, url, fp, errcode, errmsg, headers):
        """Default error handling -- don't raise an exception."""
        return addinfourl(fp, headers, "http:" + url, errcode)

def http_error_302(self, url, fp, errcode, errmsg, headers, data=None):
        """Error 302 -- relocated (temporarily)."""
        self.tries += 1
        if self.maxtries and self.tries >= self.maxtries:
            if hasattr(self, "http_error_500"):
                meth = self.http_error_500
            else:
                meth = self.http_error_default
            self.tries = 0
            return meth(url, fp, 500,
                        "Internal Server Error: Redirect Recursion", headers)
        result = self.redirect_internal(url, fp, errcode, errmsg, headers,
                                        data)
        self.tries = 0
        return result

def redirect_internal(self, url, fp, errcode, errmsg, headers, data):
        if 'location' in headers:
            newurl = headers['location']
        elif 'uri' in headers:
            newurl = headers['uri']
        else:
            return
        void = fp.read()
        fp.close()
        # In case the server sent a relative URL, join with original:
        newurl = basejoin(self.type + ":" + url, newurl)

# For security reasons we do not allow redirects to protocols
        # other than HTTP, HTTPS or FTP.
        newurl_lower = newurl.lower()
        if not (newurl_lower.startswith('http://') or
                newurl_lower.startswith('https://') or
                newurl_lower.startswith('ftp://')):
            raise IOError('redirect error', errcode,
                          errmsg + " - Redirection to url '%s' is not allowed" %
                          newurl,
                          headers)

return self.open(newurl)

def http_error_301(self, url, fp, errcode, errmsg, headers, data=None):
        """Error 301 -- also relocated (permanently)."""
        return self.http_error_302(url, fp, errcode, errmsg, headers, data)

def http_error_303(self, url, fp, errcode, errmsg, headers, data=None):
        """Error 303 -- also relocated (essentially identical to 302)."""
        return self.http_error_302(url, fp, errcode, errmsg, headers, data)

def http_error_307(self, url, fp, errcode, errmsg, headers, data=None):
        """Error 307 -- relocated, but turn POST into error."""
        if data is None:
            return self.http_error_302(url, fp, errcode, errmsg, headers, data)
        else:
            return self.http_error_default(url, fp, errcode, errmsg, headers)

def http_error_401(self, url, fp, errcode, errmsg, headers, data=None):
        """Error 401 -- authentication required.
        This function supports Basic authentication only."""
        if not 'www-authenticate' in headers:
            URLopener.http_error_default(self, url, fp,
                                         errcode, errmsg, headers)
        stuff = headers['www-authenticate']
        import re
        match = re.match('[ \t]*([^ \t]+)[ \t]+realm="([^"]*)"', stuff)
        if not match:
            URLopener.http_error_default(self, url, fp,
                                         errcode, errmsg, headers)
        scheme, realm = match.groups()
        if scheme.lower() != 'basic':
            URLopener.http_error_default(self, url, fp,
                                         errcode, errmsg, headers)
        name = 'retry_' + self.type + '_basic_auth'
        if data is None:
            return getattr(self,name)(url, realm)
        else:
            return getattr(self,name)(url, realm, data)

def http_error_407(self, url, fp, errcode, errmsg, headers, data=None):
        """Error 407 -- proxy authentication required.
        This function supports Basic authentication only."""
        if not 'proxy-authenticate' in headers:
            URLopener.http_error_default(self, url, fp,
                                         errcode, errmsg, headers)
        stuff = headers['proxy-authenticate']
        import re
        match = re.match('[ \t]*([^ \t]+)[ \t]+realm="([^"]*)"', stuff)
        if not match:
            URLopener.http_error_default(self, url, fp,
                                         errcode, errmsg, headers)
        scheme, realm = match.groups()
        if scheme.lower() != 'basic':
            URLopener.http_error_default(self, url, fp,
                                         errcode, errmsg, headers)
        name = 'retry_proxy_' + self.type + '_basic_auth'
        if data is None:
            return getattr(self,name)(url, realm)
        else:
            return getattr(self,name)(url, realm, data)

def retry_proxy_http_basic_auth(self, url, realm, data=None):
        host, selector = splithost(url)
        newurl = 'http://' + host + selector
        proxy = self.proxies['http']
        urltype, proxyhost = splittype(proxy)
        proxyhost, proxyselector = splithost(proxyhost)
        i = proxyhost.find('@') + 1
        proxyhost = proxyhost[i:]
        user, passwd = self.get_user_passwd(proxyhost, realm, i)
        if not (user or passwd): return None
        proxyhost = quote(user, safe='') + ':' + quote(passwd, safe='') + '@' + proxyhost
        self.proxies['http'] = 'http://' + proxyhost + proxyselector
        if data is None:
            return self.open(newurl)
        else:
            return self.open(newurl, data)

def retry_proxy_https_basic_auth(self, url, realm, data=None):
        host, selector = splithost(url)
        newurl = 'https://' + host + selector
        proxy = self.proxies['https']
        urltype, proxyhost = splittype(proxy)
        proxyhost, proxyselector = splithost(proxyhost)
        i = proxyhost.find('@') + 1
        proxyhost = proxyhost[i:]
        user, passwd = self.get_user_passwd(proxyhost, realm, i)
        if not (user or passwd): return None
        proxyhost = quote(user, safe='') + ':' + quote(passwd, safe='') + '@' + proxyhost
        self.proxies['https'] = 'https://' + proxyhost + proxyselector
        if data is None:
            return self.open(newurl)
        else:
            return self.open(newurl, data)

def retry_http_basic_auth(self, url, realm, data=None):
        host, selector = splithost(url)
        i = host.find('@') + 1
        host = host[i:]
        user, passwd = self.get_user_passwd(host, realm, i)
        if not (user or passwd): return None
        host = quote(user, safe='') + ':' + quote(passwd, safe='') + '@' + host
        newurl = 'http://' + host + selector
        if data is None:
            return self.open(newurl)
        else:
            return self.open(newurl, data)

def retry_https_basic_auth(self, url, realm, data=None):
        host, selector = splithost(url)
        i = host.find('@') + 1
        host = host[i:]
        user, passwd = self.get_user_passwd(host, realm, i)
        if not (user or passwd): return None
        host = quote(user, safe='') + ':' + quote(passwd, safe='') + '@' + host
        newurl = 'https://' + host + selector
        if data is None:
            return self.open(newurl)
        else:
            return self.open(newurl, data)

def get_user_passwd(self, host, realm, clear_cache = 0):
        key = realm + '@' + host.lower()
        if key in self.auth_cache:
            if clear_cache:
                del self.auth_cache[key]
            else:
                return self.auth_cache[key]
        user, passwd = self.prompt_user_passwd(host, realm)
        if user or passwd: self.auth_cache[key] = (user, passwd)
        return user, passwd

def prompt_user_passwd(self, host, realm):
        """Override this in a GUI environment!"""
        import getpass
        try:
            user = raw_input("Enter username for %s at %s: " % (realm,
                                                                host))
            passwd = getpass.getpass("Enter password for %s in %s at %s: " %
                (user, realm, host))
            return user, passwd
        except KeyboardInterrupt:
            print
            return None, None

# Utility functions

_localhost = None
def localhost():
    """Return the IP address of the magic hostname 'localhost'."""
    global _localhost
    if _localhost is None:
        _localhost = socket.gethostbyname('localhost')
    return _localhost

_thishost = None
def thishost():
    """Return the IP address of the current host."""
    global _thishost
    if _thishost is None:
        _thishost = socket.gethostbyname(socket.gethostname())
    return _thishost

_ftperrors = None
def ftperrors():
    """Return the set of errors raised by the FTP class."""
    global _ftperrors
    if _ftperrors is None:
        import ftplib
        _ftperrors = ftplib.all_errors
    return _ftperrors

_noheaders = None
def noheaders():
    """Return an empty mimetools.Message object."""
    global _noheaders
    if _noheaders is None:
        import mimetools
        try:
            from cStringIO import StringIO
        except ImportError:
            from StringIO import StringIO
        _noheaders = mimetools.Message(StringIO(), 0)
        _noheaders.fp.close()   # Recycle file descriptor
    return _noheaders

# Utility classes

class ftpwrapper:
    """Class used by open_ftp() for cache of open FTP connections."""

def __init__(self, user, passwd, host, port, dirs,
                 timeout=socket._GLOBAL_DEFAULT_TIMEOUT):
        self.user = user
        self.passwd = passwd
        self.host = host
        self.port = port
        self.dirs = dirs
        self.timeout = timeout
        self.init()

def init(self):
        import ftplib
        self.busy = 0
        self.ftp = ftplib.FTP()
        self.ftp.connect(self.host, self.port, self.timeout)
        self.ftp.login(self.user, self.passwd)
        for dir in self.dirs:
            self.ftp.cwd(dir)

def retrfile(self, file, type):
        import ftplib
        self.endtransfer()
        if type in ('d', 'D'): cmd = 'TYPE A'; isdir = 1
        else: cmd = 'TYPE ' + type; isdir = 0
        try:
            self.ftp.voidcmd(cmd)
        except ftplib.all_errors:
            self.init()
            self.ftp.voidcmd(cmd)
        conn = None
        if file and not isdir:
            # Try to retrieve as a file
            try:
                cmd = 'RETR ' + file
                conn = self.ftp.ntransfercmd(cmd)
            except ftplib.error_perm, reason:
                if str(reason)[:3] != '550':
                    raise IOError, ('ftp error', reason), sys.exc_info()[2]
        if not conn:
            # Set transfer mode to ASCII!
            self.ftp.voidcmd('TYPE A')
            # Try a directory listing. Verify that directory exists.
            if file:
                pwd = self.ftp.pwd()
                try:
                    try:
                        self.ftp.cwd(file)
                    except ftplib.error_perm, reason:
                        raise IOError, ('ftp error', reason), sys.exc_info()[2]
                finally:
                    self.ftp.cwd(pwd)
                cmd = 'LIST ' + file
            else:
                cmd = 'LIST'
            conn = self.ftp.ntransfercmd(cmd)
        self.busy = 1
        # Pass back both a suitably decorated object and a retrieval length
        return (addclosehook(conn[0].makefile('rb'),
                             self.endtransfer), conn[1])
    def endtransfer(self):
        if not self.busy:
            return
        self.busy = 0
        try:
            self.ftp.voidresp()
        except ftperrors():
            pass

def close(self):
        self.endtransfer()
        try:
            self.ftp.close()
        except ftperrors():
            pass

class addbase:
    """Base class for addinfo and addclosehook."""

def __init__(self, fp):
        self.fp = fp
        self.read = self.fp.read
        self.readline = self.fp.readline
        if hasattr(self.fp, "readlines"): self.readlines = self.fp.readlines
        if hasattr(self.fp, "fileno"):
            self.fileno = self.fp.fileno
        else:
            self.fileno = lambda: None
        if hasattr(self.fp, "__iter__"):
            self.__iter__ = self.fp.__iter__
            if hasattr(self.fp, "next"):
                self.next = self.fp.next

def __repr__(self):
        return '<%s at %r whose fp = %r>' % (self.__class__.__name__,
                                             id(self), self.fp)

def close(self):
        self.read = None
        self.readline = None
        self.readlines = None
        self.fileno = None
        if self.fp: self.fp.close()
        self.fp = None

class addclosehook(addbase):
    """Class to add a close hook to an open file."""

def __init__(self, fp, closehook, *hookargs):
        addbase.__init__(self, fp)
        self.closehook = closehook
        self.hookargs = hookargs

def close(self):
        addbase.close(self)
        if self.closehook:
            self.closehook(*self.hookargs)
            self.closehook = None
            self.hookargs = None

class addinfo(addbase):
    """class to add an info() method to an open file."""

def __init__(self, fp, headers):
        addbase.__init__(self, fp)
        self.headers = headers

def info(self):
        return self.headers

class addinfourl(addbase):
    """class to add info() and geturl() methods to an open file."""

def __init__(self, fp, headers, url, code=None):
        addbase.__init__(self, fp)
        self.headers = headers
        self.url = url
        self.code = code

def info(self):
        return self.headers

def getcode(self):
        return self.code

def geturl(self):
        return self.url

# Utilities to parse URLs (most of these return None for missing parts):
# unwrap('<URL:type://host/path>') --> 'type://host/path'
# splittype('type:opaquestring') --> 'type', 'opaquestring'
# splithost('//host[:port]/path') --> 'host[:port]', '/path'
# splituser('user[:passwd]@host[:port]') --> 'user[:passwd]', 'host[:port]'
# splitpasswd('user:passwd') -> 'user', 'passwd'
# splitport('host:port') --> 'host', 'port'
# splitquery('/path?query') --> '/path', 'query'
# splittag('/path#tag') --> '/path', 'tag'
# splitattr('/path;attr1=value1;attr2=value2;...') ->
#   '/path', ['attr1=value1', 'attr2=value2', ...]
# splitvalue('attr=value') --> 'attr', 'value'
# unquote('abc%20def') -> 'abc def'
# quote('abc def') -> 'abc%20def')

try:
    unicode
except NameError:
    def _is_unicode(x):
        return 0
else:
    def _is_unicode(x):
        return isinstance(x, unicode)

def toBytes(url):
    """toBytes(u"URL") --> 'URL'."""
    # Most URL schemes require ASCII. If that changes, the conversion
    # can be relaxed
    if _is_unicode(url):
        try:
            url = url.encode("ASCII")
        except UnicodeError:
            raise UnicodeError("URL " + repr(url) +
                               " contains non-ASCII characters")
    return url

def unwrap(url):
    """unwrap('<URL:type://host/path>') --> 'type://host/path'."""
    url = url.strip()
    if url[:1] == '<' and url[-1:] == '>':
        url = url[1:-1].strip()
    if url[:4] == 'URL:': url = url[4:].strip()
    return url

_typeprog = None
def splittype(url):
    """splittype('type:opaquestring') --> 'type', 'opaquestring'."""
    global _typeprog
    if _typeprog is None:
        import re
        _typeprog = re.compile('^([^/:]+):')

match = _typeprog.match(url)
    if match:
        scheme = match.group(1)
        return scheme.lower(), url[len(scheme) + 1:]
    return None, url

_hostprog = None
def splithost(url):
    """splithost('//host[:port]/path') --> 'host[:port]', '/path'."""
    global _hostprog
    if _hostprog is None:
        import re
        _hostprog = re.compile('^//([^/?]*)(.*)$')

match = _hostprog.match(url)
    if match: return match.group(1, 2)
    return None, url

_userprog = None
def splituser(host):
    """splituser('user[:passwd]@host[:port]') --> 'user[:passwd]', 'host[:port]'."""
    global _userprog
    if _userprog is None:
        import re
        _userprog = re.compile('^(.*)@(.*)$')

match = _userprog.match(host)
    if match: return map(unquote, match.group(1, 2))
    return None, host

_passwdprog = None
def splitpasswd(user):
    """splitpasswd('user:passwd') -> 'user', 'passwd'."""
    global _passwdprog
    if _passwdprog is None:
        import re
        _passwdprog = re.compile('^([^:]*):(.*)$')

match = _passwdprog.match(user)
    if match: return match.group(1, 2)
    return user, None

# splittag('/path#tag') --> '/path', 'tag'
_portprog = None
def splitport(host):
    """splitport('host:port') --> 'host', 'port'."""
    global _portprog
    if _portprog is None:
        import re
        _portprog = re.compile('^(.*):([0-9]+)$')

match = _portprog.match(host)
    if match: return match.group(1, 2)
    return host, None

_nportprog = None
def splitnport(host, defport=-1):
    """Split host and port, returning numeric port.
    Return given default port if no ':' found; defaults to -1.
    Return numerical port if a valid number are found after ':'.
    Return None if ':' but not a valid number."""
    global _nportprog
    if _nportprog is None:
        import re
        _nportprog = re.compile('^(.*):(.*)$')

match = _nportprog.match(host)
    if match:
        host, port = match.group(1, 2)
        try:
            if not port: raise ValueError, "no digits"
            nport = int(port)
        except ValueError:
            nport = None
        return host, nport
    return host, defport

_queryprog = None
def splitquery(url):
    """splitquery('/path?query') --> '/path', 'query'."""
    global _queryprog
    if _queryprog is None:
        import re
        _queryprog = re.compile('^(.*)\?([^?]*)$')

match = _queryprog.match(url)
    if match: return match.group(1, 2)
    return url, None

_tagprog = None
def splittag(url):
    """splittag('/path#tag') --> '/path', 'tag'."""
    global _tagprog
    if _tagprog is None:
        import re
        _tagprog = re.compile('^(.*)#([^#]*)$')

match = _tagprog.match(url)
    if match: return match.group(1, 2)
    return url, None

def splitattr(url):
    """splitattr('/path;attr1=value1;attr2=value2;...') ->
        '/path', ['attr1=value1', 'attr2=value2', ...]."""
    words = url.split(';')
    return words[0], words[1:]

_valueprog = None
def splitvalue(attr):
    """splitvalue('attr=value') --> 'attr', 'value'."""
    global _valueprog
    if _valueprog is None:
        import re
        _valueprog = re.compile('^([^=]*)=(.*)$')

match = _valueprog.match(attr)
    if match: return match.group(1, 2)
    return attr, None

_hexdig = '0123456789ABCDEFabcdef'
_hextochr = dict((a+b, chr(int(a+b,16))) for a in _hexdig for b in _hexdig)

def unquote(s):
    """unquote('abc%20def') -> 'abc def'."""
    res = s.split('%')
    for i in xrange(1, len(res)):
        item = res[i]
        try:
            res[i] = _hextochr[item[:2]] + item[2:]
        except KeyError:
            res[i] = '%' + item
        except UnicodeDecodeError:
            res[i] = unichr(int(item[:2], 16)) + item[2:]
    return "".join(res)

def unquote_plus(s):
    """unquote('%7e/abc+def') -> '~/abc def'"""
    s = s.replace('+', ' ')
    return unquote(s)

always_safe = ('ABCDEFGHIJKLMNOPQRSTUVWXYZ'
               'abcdefghijklmnopqrstuvwxyz'
               '0123456789' '_.-')
_safemaps = {}

def quote(s, safe = '/'):
    """quote('abc def') -> 'abc%20def'

Each part of a URL, e.g. the path info, the query, etc., has a
    different set of reserved characters that must be quoted.

RFC 2396 Uniform Resource Identifiers (URI): Generic Syntax lists
    the following reserved characters.

reserved    = ";" | "/" | "?" | ":" | "@" | "&" | "=" | "+" |
                  "$" | ","

Each of these characters is reserved in some component of a URL,
    but not necessarily in all of them.

By default, the quote function is intended for quoting the path
    section of a URL.  Thus, it will not encode '/'.  This character
    is reserved, but in typical usage the quote function is being
    called on a path where the existing slash characters are used as
    reserved characters.
    """
    cachekey = (safe, always_safe)
    try:
        safe_map = _safemaps[cachekey]
    except KeyError:
        safe += always_safe
        safe_map = {}
        for i in range(256):
            c = chr(i)
            safe_map[c] = (c in safe) and c or ('%%%02X' % i)
        _safemaps[cachekey] = safe_map
    res = map(safe_map.__getitem__, s)
    return ''.join(res)

def quote_plus(s, safe = ''):
    """Quote the query fragment of a URL; replacing ' ' with '+'"""
    if ' ' in s:
        s = quote(s, safe + ' ')
        return s.replace(' ', '+')
    return quote(s, safe)

def urlencode(query,doseq=0):
    """Encode a sequence of two-element tuples or dictionary into a URL query string.

If any values in the query arg are sequences and doseq is true, each
    sequence element is converted to a separate parameter.

If the query arg is a sequence of two-element tuples, the order of the
    parameters in the output will match the order of parameters in the
    input.
    """

if hasattr(query,"items"):
        # mapping objects
        query = query.items()
    else:
        # it's a bother at times that strings and string-like objects are
        # sequences...
        try:
            # non-sequence items should not work with len()
            # non-empty strings will fail this
            if len(query) and not isinstance(query[0], tuple):
                raise TypeError
            # zero-length sequences of all types will get here and succeed,
            # but that's a minor nit - since the original implementation
            # allowed empty dicts that type of behavior probably should be
            # preserved for consistency
        except TypeError:
            ty,va,tb = sys.exc_info()
            raise TypeError, "not a valid non-string sequence or mapping object", tb

l = []
    if not doseq:
        # preserve old behavior
        for k, v in query:
            k = quote_plus(str(k))
            v = quote_plus(str(v))
            l.append(k + '=' + v)
    else:
        for k, v in query:
            k = quote_plus(str(k))
            if isinstance(v, str):
                v = quote_plus(v)
                l.append(k + '=' + v)
            elif _is_unicode(v):
                # is there a reasonable way to convert to ASCII?
                # encode generates a string, but "replace" or "ignore"
                # lose information and "strict" can raise UnicodeError
                v = quote_plus(v.encode("ASCII","replace"))
                l.append(k + '=' + v)
            else:
                try:
                    # is this a sufficient test for sequence-ness?
                    x = len(v)
                except TypeError:
                    # not a sequence
                    v = quote_plus(str(v))
                    l.append(k + '=' + v)
                else:
                    # loop over the sequence
                    for elt in v:
                        l.append(k + '=' + quote_plus(str(elt)))
    return '&'.join(l)

# Proxy handling
def getproxies_environment():
    """Return a dictionary of scheme -> proxy server URL mappings.

Scan the environment for variables named <scheme>_proxy;
    this seems to be the standard convention.  If you need a
    different way, you can pass a proxies dictionary to the
    [Fancy]URLopener constructor.

"""
    # Get all variables
    proxies = {}
    for name, value in os.environ.items():
        name = name.lower()
        if value and name[-6:] == '_proxy':
            proxies[name[:-6]] = value

# CVE-2016-1000110 - If we are running as CGI script, forget HTTP_PROXY
    # (non-all-lowercase) as it may be set from the web server by a "Proxy:"
    # header from the client
    # If "proxy" is lowercase, it will still be used thanks to the next block
    if 'REQUEST_METHOD' in os.environ:
        proxies.pop('http', None)

return proxies

def proxy_bypass_environment(host):
    """Test if proxies should not be used for a particular host.

Checks the environment for a variable named no_proxy, which should
    be a list of DNS suffixes separated by commas, or '*' for all hosts.
    """
    no_proxy = os.environ.get('no_proxy', '') or os.environ.get('NO_PROXY', '')
    # '*' is special case for always bypass
    if no_proxy == '*':
        return 1
    # strip port off host
    hostonly, port = splitport(host)
    # check if the host ends with any of the DNS suffixes
    for name in no_proxy.split(','):
        if name and (hostonly.endswith(name) or host.endswith(name)):
            return 1
    # otherwise, don't bypass
    return 0

if sys.platform == 'darwin':
    from _scproxy import _get_proxy_settings, _get_proxies

def proxy_bypass_macosx_sysconf(host):
        """
        Return True iff this host shouldn't be accessed using a proxy

This function uses the MacOSX framework SystemConfiguration
        to fetch the proxy information.
        """
        import re
        import socket
        from fnmatch import fnmatch

hostonly, port = splitport(host)

def ip2num(ipAddr):
            parts = ipAddr.split('.')
            parts = map(int, parts)
            if len(parts) != 4:
                parts = (parts + [0, 0, 0, 0])[:4]
            return (parts[0] << 24) | (parts[1] << 16) | (parts[2] << 8) | parts[3]

proxy_settings = _get_proxy_settings()

# Check for simple host names:
        if '.' not in host:
            if proxy_settings['exclude_simple']:
                return True

hostIP = None

for value in proxy_settings.get('exceptions', ()):
            # Items in the list are strings like these: *.local, 169.254/16
            if not value: continue

m = re.match(r"(\d+(?:\.\d+)*)(/\d+)?", value)
            if m is not None:
                if hostIP is None:
                    try:
                        hostIP = socket.gethostbyname(hostonly)
                        hostIP = ip2num(hostIP)
                    except socket.error:
                        continue

base = ip2num(m.group(1))
                mask = m.group(2)
                if mask is None:
                    mask = 8 * (m.group(1).count('.') + 1)

else:
                    mask = int(mask[1:])
                    mask = 32 - mask

if (hostIP >> mask) == (base >> mask):
                    return True

elif fnmatch(host, value):
                return True

return False

def getproxies_macosx_sysconf():
        """Return a dictionary of scheme -> proxy server URL mappings.

This function uses the MacOSX framework SystemConfiguration
        to fetch the proxy information.
        """
        return _get_proxies()

def proxy_bypass(host):
        if getproxies_environment():
            return proxy_bypass_environment(host)
        else:
            return proxy_bypass_macosx_sysconf(host)

def getproxies():
        return getproxies_environment() or getproxies_macosx_sysconf()

elif os.name == 'nt':
    def getproxies_registry():
        """Return a dictionary of scheme -> proxy server URL mappings.

Win32 uses the registry to store proxies.

"""
        proxies = {}
        try:
            import _winreg
        except ImportError:
            # Std module, so should be around - but you never know!
            return proxies
        try:
            internetSettings = _winreg.OpenKey(_winreg.HKEY_CURRENT_USER,
                r'Software\Microsoft\Windows\CurrentVersion\Internet Settings')
            proxyEnable = _winreg.QueryValueEx(internetSettings,
                                               'ProxyEnable')[0]
            if proxyEnable:
                # Returned as Unicode but problems if not converted to ASCII
                proxyServer = str(_winreg.QueryValueEx(internetSettings,
                                                       'ProxyServer')[0])
                if '=' in proxyServer:
                    # Per-protocol settings
                    for p in proxyServer.split(';'):
                        protocol, address = p.split('=', 1)
                        # See if address has a type:// prefix
                        import re
                        if not re.match('^([^/:]+)://', address):
                            address = '%s://%s' % (protocol, address)
                        proxies[protocol] = address
                else:
                    # Use one setting for all protocols
                    if proxyServer[:5] == 'http:':
                        proxies['http'] = proxyServer
                    else:
                        proxies['http'] = 'http://%s' % proxyServer
                        proxies['https'] = 'https://%s' % proxyServer
                        proxies['ftp'] = 'ftp://%s' % proxyServer
            internetSettings.Close()
        except (WindowsError, ValueError, TypeError):
            # Either registry key not found etc, or the value in an
            # unexpected format.
            # proxies already set up to be empty so nothing to do
            pass
        return proxies

def getproxies():
        """Return a dictionary of scheme -> proxy server URL mappings.

Returns settings gathered from the environment, if specified,
        or the registry.

"""
        return getproxies_environment() or getproxies_registry()

def proxy_bypass_registry(host):
        try:
            import _winreg
            import re
        except ImportError:
            # Std modules, so should be around - but you never know!
            return 0
        try:
            internetSettings = _winreg.OpenKey(_winreg.HKEY_CURRENT_USER,
                r'Software\Microsoft\Windows\CurrentVersion\Internet Settings')
            proxyEnable = _winreg.QueryValueEx(internetSettings,
                                               'ProxyEnable')[0]
            proxyOverride = str(_winreg.QueryValueEx(internetSettings,
                                                     'ProxyOverride')[0])
            # ^^^^ Returned as Unicode but problems if not converted to ASCII
        except WindowsError:
            return 0
        if not proxyEnable or not proxyOverride:
            return 0
        # try to make a host list from name and IP address.
        rawHost, port = splitport(host)
        host = [rawHost]
        try:
            addr = socket.gethostbyname(rawHost)
            if addr != rawHost:
                host.append(addr)
        except socket.error:
            pass
        try:
            fqdn = socket.getfqdn(rawHost)
            if fqdn != rawHost:
                host.append(fqdn)
        except socket.error:
            pass
        # make a check value list from the registry entry: replace the
        # '<local>' string by the localhost entry and the corresponding
        # canonical entry.
        proxyOverride = proxyOverride.split(';')
        i = 0
        while i < len(proxyOverride):
            if proxyOverride[i] == '<local>':
                proxyOverride[i:i+1] = ['localhost',
                                        '127.0.0.1',
                                        socket.gethostname(),
                                        socket.gethostbyname(
                                            socket.gethostname())]
            i += 1
        # print proxyOverride
        # now check if we match one of the registry values.
        for test in proxyOverride:
            test = test.replace(".", r"\.")     # mask dots
            test = test.replace("*", r".*")     # change glob sequence
            test = test.replace("?", r".")      # change glob char
            for val in host:
                # print "%s <--> %s" %( test, val )
                if re.match(test, val, re.I):
                    return 1
        return 0

def proxy_bypass(host):
        """Return a dictionary of scheme -> proxy server URL mappings.

Returns settings gathered from the environment, if specified,
        or the registry.

"""
        if getproxies_environment():
            return proxy_bypass_environment(host)
        else:
            return proxy_bypass_registry(host)

else:
    # By default use environment variables
    getproxies = getproxies_environment
    proxy_bypass = proxy_bypass_environment

# Test and time quote() and unquote()
def test1():
    s = ''
    for i in range(256): s = s + chr(i)
    s = s*4
    t0 = time.time()
    qs = quote(s)
    uqs = unquote(qs)
    t1 = time.time()
    if uqs != s:
        print 'Wrong!'
    print repr(s)
    print repr(qs)
    print repr(uqs)
    print round(t1 - t0, 3), 'sec'

def reporthook(blocknum, blocksize, totalsize):
    # Report during remote transfers
    print "Block number: %d, Block size: %d, Total size: %d" % (
        blocknum, blocksize, totalsize)

# Test program
def test(args=[]):
    if not args:
        args = [
            '/etc/passwd',
            'file:/etc/passwd',
            'file://localhost/etc/passwd',
            'ftp://ftp.gnu.org/pub/README',
            'http://www.python.org/index.html',
            ]
        if hasattr(URLopener, "open_https"):
            args.append('https://synergy.as.cmu.edu/~geek/')
    try:
        for url in args:
            print '-'*10, url, '-'*10
            fn, h = urlretrieve(url, None, reporthook)
            print fn
            if h:
                print '======'
                for k in h.keys(): print k + ':', h[k]
                print '======'
            fp = open(fn, 'rb')
            data = fp.read()
            del fp
            if '\r' in data:
                table = string.maketrans("", "")
                data = data.translate(table, "\r")
            print data
            fn, h = None, None
        print '-'*40
    finally:
        urlcleanup()

def main():
    import getopt, sys
    try:
        opts, args = getopt.getopt(sys.argv[1:], "th")
    except getopt.error, msg:
        print msg
        print "Use -h for help"
        return
    t = 0
    for o, a in opts:
        if o == '-t':
            t = t + 1
        if o == '-h':
            print "Usage: python urllib.py [-t] [url ...]"
            print "-t runs self-test;",
            print "otherwise, contents of urls are printed"
            return
    if t:
        if t > 1:
            test1()
        test(args)
    else:
        if not args:
            print "Use -h for help"
        for url in args:
            print urlopen(url).read(),

# Run test program when run as a script
if __name__ == '__main__':
    main()

cmd: