mirror of
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65230a2de7
x in string.whitespace => x.isspace() type(x) in types.StringTypes => isinstance(x, basestring) isinstance(x, types.StringTypes) => isinstance(x, basestring) type(x) is types.StringType => isinstance(x, str) type(x) == types.StringType => isinstance(x, str) string.split(x, ...) => x.split(...) string.join(x, y) => y.join(x) string.zfill(x, ...) => x.zfill(...) string.count(x, ...) => x.count(...) hasattr(types, "UnicodeType") => try: unicode except NameError: type(x) != types.TupleTuple => not isinstance(x, tuple) isinstance(x, types.TupleType) => isinstance(x, tuple) type(x) is types.IntType => isinstance(x, int) Do not mention the string module in the rlcompleter docstring. This partially applies SF patch http://www.python.org/sf/562373 (with basestring instead of string). (It excludes the changes to unittest.py and does not change the os.stat stuff.)
1470 lines
50 KiB
Python
1470 lines
50 KiB
Python
"""Open an arbitrary URL.
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See the following document for more info on URLs:
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"Names and Addresses, URIs, URLs, URNs, URCs", at
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http://www.w3.org/pub/WWW/Addressing/Overview.html
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See also the HTTP spec (from which the error codes are derived):
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"HTTP - Hypertext Transfer Protocol", at
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http://www.w3.org/pub/WWW/Protocols/
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Related standards and specs:
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- RFC1808: the "relative URL" spec. (authoritative status)
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- RFC1738 - the "URL standard". (authoritative status)
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- RFC1630 - the "URI spec". (informational status)
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The object returned by URLopener().open(file) will differ per
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protocol. All you know is that is has methods read(), readline(),
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readlines(), fileno(), close() and info(). The read*(), fileno()
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and close() methods work like those of open files.
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The info() method returns a mimetools.Message object which can be
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used to query various info about the object, if available.
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(mimetools.Message objects are queried with the getheader() method.)
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"""
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import string
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import socket
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import os
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import time
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import sys
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__all__ = ["urlopen", "URLopener", "FancyURLopener", "urlretrieve",
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"urlcleanup", "quote", "quote_plus", "unquote", "unquote_plus",
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"urlencode", "url2pathname", "pathname2url", "splittag",
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"localhost", "thishost", "ftperrors", "basejoin", "unwrap",
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"splittype", "splithost", "splituser", "splitpasswd", "splitport",
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"splitnport", "splitquery", "splitattr", "splitvalue",
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"splitgophertype", "getproxies"]
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__version__ = '1.15' # XXX This version is not always updated :-(
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MAXFTPCACHE = 10 # Trim the ftp cache beyond this size
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# Helper for non-unix systems
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if os.name == 'mac':
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from macurl2path import url2pathname, pathname2url
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elif os.name == 'nt':
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from nturl2path import url2pathname, pathname2url
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elif os.name == 'riscos':
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from rourl2path import url2pathname, pathname2url
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else:
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def url2pathname(pathname):
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return unquote(pathname)
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def pathname2url(pathname):
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return quote(pathname)
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# This really consists of two pieces:
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# (1) a class which handles opening of all sorts of URLs
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# (plus assorted utilities etc.)
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# (2) a set of functions for parsing URLs
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# XXX Should these be separated out into different modules?
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# Shortcut for basic usage
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_urlopener = None
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def urlopen(url, data=None, proxies=None):
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"""urlopen(url [, data]) -> open file-like object"""
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global _urlopener
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if proxies is not None:
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opener = FancyURLopener(proxies=proxies)
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elif not _urlopener:
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opener = FancyURLopener()
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_urlopener = opener
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else:
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opener = _urlopener
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if data is None:
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return opener.open(url)
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else:
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return opener.open(url, data)
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def urlretrieve(url, filename=None, reporthook=None, data=None):
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global _urlopener
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if not _urlopener:
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_urlopener = FancyURLopener()
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return _urlopener.retrieve(url, filename, reporthook, data)
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def urlcleanup():
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if _urlopener:
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_urlopener.cleanup()
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ftpcache = {}
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class URLopener:
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"""Class to open URLs.
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This is a class rather than just a subroutine because we may need
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more than one set of global protocol-specific options.
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Note -- this is a base class for those who don't want the
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automatic handling of errors type 302 (relocated) and 401
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(authorization needed)."""
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__tempfiles = None
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version = "Python-urllib/%s" % __version__
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# Constructor
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def __init__(self, proxies=None, **x509):
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if proxies is None:
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proxies = getproxies()
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assert hasattr(proxies, 'has_key'), "proxies must be a mapping"
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self.proxies = proxies
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self.key_file = x509.get('key_file')
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self.cert_file = x509.get('cert_file')
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self.addheaders = [('User-agent', self.version)]
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self.__tempfiles = []
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self.__unlink = os.unlink # See cleanup()
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self.tempcache = None
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# Undocumented feature: if you assign {} to tempcache,
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# it is used to cache files retrieved with
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# self.retrieve(). This is not enabled by default
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# since it does not work for changing documents (and I
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# haven't got the logic to check expiration headers
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# yet).
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self.ftpcache = ftpcache
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# Undocumented feature: you can use a different
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# ftp cache by assigning to the .ftpcache member;
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# in case you want logically independent URL openers
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# XXX This is not threadsafe. Bah.
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def __del__(self):
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self.close()
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def close(self):
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self.cleanup()
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def cleanup(self):
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# This code sometimes runs when the rest of this module
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# has already been deleted, so it can't use any globals
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# or import anything.
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if self.__tempfiles:
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for file in self.__tempfiles:
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try:
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self.__unlink(file)
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except OSError:
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pass
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del self.__tempfiles[:]
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if self.tempcache:
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self.tempcache.clear()
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def addheader(self, *args):
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"""Add a header to be used by the HTTP interface only
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e.g. u.addheader('Accept', 'sound/basic')"""
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self.addheaders.append(args)
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# External interface
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def open(self, fullurl, data=None):
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"""Use URLopener().open(file) instead of open(file, 'r')."""
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fullurl = unwrap(toBytes(fullurl))
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if self.tempcache and fullurl in self.tempcache:
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filename, headers = self.tempcache[fullurl]
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fp = open(filename, 'rb')
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return addinfourl(fp, headers, fullurl)
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urltype, url = splittype(fullurl)
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if not urltype:
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urltype = 'file'
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if urltype in self.proxies:
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proxy = self.proxies[urltype]
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urltype, proxyhost = splittype(proxy)
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host, selector = splithost(proxyhost)
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url = (host, fullurl) # Signal special case to open_*()
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else:
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proxy = None
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name = 'open_' + urltype
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self.type = urltype
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if '-' in name:
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# replace - with _
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name = '_'.join(name.split('-'))
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if not hasattr(self, name):
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if proxy:
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return self.open_unknown_proxy(proxy, fullurl, data)
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else:
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return self.open_unknown(fullurl, data)
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try:
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if data is None:
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return getattr(self, name)(url)
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else:
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return getattr(self, name)(url, data)
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except socket.error, msg:
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raise IOError, ('socket error', msg), sys.exc_info()[2]
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def open_unknown(self, fullurl, data=None):
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"""Overridable interface to open unknown URL type."""
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type, url = splittype(fullurl)
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raise IOError, ('url error', 'unknown url type', type)
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def open_unknown_proxy(self, proxy, fullurl, data=None):
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"""Overridable interface to open unknown URL type."""
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type, url = splittype(fullurl)
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raise IOError, ('url error', 'invalid proxy for %s' % type, proxy)
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# External interface
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def retrieve(self, url, filename=None, reporthook=None, data=None):
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"""retrieve(url) returns (filename, None) for a local object
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or (tempfilename, headers) for a remote object."""
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url = unwrap(toBytes(url))
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if self.tempcache and url in self.tempcache:
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return self.tempcache[url]
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type, url1 = splittype(url)
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if filename is None and (not type or type == 'file'):
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try:
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fp = self.open_local_file(url1)
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hdrs = fp.info()
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del fp
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return url2pathname(splithost(url1)[1]), hdrs
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except IOError, msg:
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pass
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fp = self.open(url, data)
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headers = fp.info()
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if not filename:
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import tempfile
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garbage, path = splittype(url)
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garbage, path = splithost(path or "")
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path, garbage = splitquery(path or "")
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path, garbage = splitattr(path or "")
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suffix = os.path.splitext(path)[1]
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filename = tempfile.mktemp(suffix)
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self.__tempfiles.append(filename)
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result = filename, headers
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if self.tempcache is not None:
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self.tempcache[url] = result
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tfp = open(filename, 'wb')
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bs = 1024*8
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size = -1
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blocknum = 1
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if reporthook:
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if "content-length" in headers:
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size = int(headers["Content-Length"])
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reporthook(0, bs, size)
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block = fp.read(bs)
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if reporthook:
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reporthook(1, bs, size)
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while block:
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tfp.write(block)
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block = fp.read(bs)
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blocknum = blocknum + 1
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if reporthook:
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reporthook(blocknum, bs, size)
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fp.close()
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tfp.close()
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del fp
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del tfp
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return result
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# Each method named open_<type> knows how to open that type of URL
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def open_http(self, url, data=None):
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"""Use HTTP protocol."""
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import httplib
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user_passwd = None
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if isinstance(url, str):
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host, selector = splithost(url)
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if host:
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user_passwd, host = splituser(host)
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host = unquote(host)
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realhost = host
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else:
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host, selector = url
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urltype, rest = splittype(selector)
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url = rest
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user_passwd = None
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if urltype.lower() != 'http':
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realhost = None
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else:
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realhost, rest = splithost(rest)
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if realhost:
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user_passwd, realhost = splituser(realhost)
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if user_passwd:
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selector = "%s://%s%s" % (urltype, realhost, rest)
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if proxy_bypass(realhost):
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host = realhost
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#print "proxy via http:", host, selector
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if not host: raise IOError, ('http error', 'no host given')
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if user_passwd:
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import base64
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auth = base64.encodestring(user_passwd).strip()
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else:
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auth = None
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h = httplib.HTTP(host)
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if data is not None:
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h.putrequest('POST', selector)
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h.putheader('Content-type', 'application/x-www-form-urlencoded')
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h.putheader('Content-length', '%d' % len(data))
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else:
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h.putrequest('GET', selector)
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if auth: h.putheader('Authorization', 'Basic %s' % auth)
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if realhost: h.putheader('Host', realhost)
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for args in self.addheaders: apply(h.putheader, args)
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h.endheaders()
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if data is not None:
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h.send(data)
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errcode, errmsg, headers = h.getreply()
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fp = h.getfile()
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if errcode == 200:
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return addinfourl(fp, headers, "http:" + url)
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else:
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if data is None:
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return self.http_error(url, fp, errcode, errmsg, headers)
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else:
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return self.http_error(url, fp, errcode, errmsg, headers, data)
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def http_error(self, url, fp, errcode, errmsg, headers, data=None):
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"""Handle http errors.
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Derived class can override this, or provide specific handlers
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named http_error_DDD where DDD is the 3-digit error code."""
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# First check if there's a specific handler for this error
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name = 'http_error_%d' % errcode
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if hasattr(self, name):
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method = getattr(self, name)
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if data is None:
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result = method(url, fp, errcode, errmsg, headers)
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else:
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result = method(url, fp, errcode, errmsg, headers, data)
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if result: return result
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return self.http_error_default(url, fp, errcode, errmsg, headers)
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def http_error_default(self, url, fp, errcode, errmsg, headers):
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"""Default error handler: close the connection and raise IOError."""
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void = fp.read()
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fp.close()
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raise IOError, ('http error', errcode, errmsg, headers)
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|
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if hasattr(socket, "ssl"):
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def open_https(self, url, data=None):
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"""Use HTTPS protocol."""
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import httplib
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user_passwd = None
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if isinstance(url, str):
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host, selector = splithost(url)
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if host:
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user_passwd, host = splituser(host)
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host = unquote(host)
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realhost = host
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else:
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host, selector = url
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urltype, rest = splittype(selector)
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url = rest
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user_passwd = None
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if urltype.lower() != 'https':
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realhost = None
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else:
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realhost, rest = splithost(rest)
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if realhost:
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user_passwd, realhost = splituser(realhost)
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if user_passwd:
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selector = "%s://%s%s" % (urltype, realhost, rest)
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#print "proxy via https:", host, selector
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if not host: raise IOError, ('https error', 'no host given')
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if user_passwd:
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import base64
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auth = base64.encodestring(user_passwd).strip()
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else:
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auth = None
|
|
h = httplib.HTTPS(host, 0,
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key_file=self.key_file,
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cert_file=self.cert_file)
|
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if data is not None:
|
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h.putrequest('POST', selector)
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h.putheader('Content-type',
|
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'application/x-www-form-urlencoded')
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h.putheader('Content-length', '%d' % len(data))
|
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else:
|
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h.putrequest('GET', selector)
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if auth: h.putheader('Authorization: Basic %s' % auth)
|
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if realhost: h.putheader('Host', realhost)
|
|
for args in self.addheaders: apply(h.putheader, args)
|
|
h.endheaders()
|
|
if data is not None:
|
|
h.send(data)
|
|
errcode, errmsg, headers = h.getreply()
|
|
fp = h.getfile()
|
|
if errcode == 200:
|
|
return addinfourl(fp, headers, "https:" + url)
|
|
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_gopher(self, url):
|
|
"""Use Gopher protocol."""
|
|
import gopherlib
|
|
host, selector = splithost(url)
|
|
if not host: raise IOError, ('gopher error', 'no host given')
|
|
host = unquote(host)
|
|
type, selector = splitgophertype(selector)
|
|
selector, query = splitquery(selector)
|
|
selector = unquote(selector)
|
|
if query:
|
|
query = unquote(query)
|
|
fp = gopherlib.send_query(selector, query, host)
|
|
else:
|
|
fp = gopherlib.send_selector(selector, host)
|
|
return addinfourl(fp, noheaders(), "gopher:" + url)
|
|
|
|
def open_file(self, url):
|
|
"""Use local file or FTP depending on form of URL."""
|
|
if url[:2] == '//' and url[2:3] != '/':
|
|
return self.open_ftp(url)
|
|
else:
|
|
return self.open_local_file(url)
|
|
|
|
def open_local_file(self, url):
|
|
"""Use local file."""
|
|
import mimetypes, mimetools, rfc822, 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 = rfc822.formatdate(stats.st_mtime)
|
|
mtype = mimetypes.guess_type(url)[0]
|
|
headers = mimetools.Message(StringIO.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."""
|
|
import mimetypes, mimetools, 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.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."""
|
|
# ignore POSTed data
|
|
#
|
|
# syntax of data URLs:
|
|
# dataurl := "data:" [ mediatype ] [ ";base64" ] "," data
|
|
# mediatype := [ type "/" subtype ] *( ";" parameter )
|
|
# data := *urlchar
|
|
# parameter := attribute "=" value
|
|
import StringIO, mimetools
|
|
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 %T 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.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):
|
|
apply(URLopener.__init__, (self,) + args)
|
|
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)
|
|
|
|
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)
|
|
if data is None:
|
|
return self.open(newurl)
|
|
else:
|
|
return self.open(newurl, data)
|
|
|
|
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_401(self, url, fp, errcode, errmsg, headers, data=None):
|
|
"""Error 401 -- authentication required.
|
|
See this URL for a description of the basic authentication scheme:
|
|
http://www.ics.uci.edu/pub/ietf/http/draft-ietf-http-v10-spec-00.txt"""
|
|
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 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 = '//' + host + selector
|
|
return self.open_https(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
|
|
import StringIO
|
|
_noheaders = mimetools.Message(StringIO.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):
|
|
self.user = user
|
|
self.passwd = passwd
|
|
self.host = host
|
|
self.port = port
|
|
self.dirs = dirs
|
|
self.init()
|
|
|
|
def init(self):
|
|
import ftplib
|
|
self.busy = 0
|
|
self.ftp = ftplib.FTP()
|
|
self.ftp.connect(self.host, self.port)
|
|
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:
|
|
# Use nlst to see if the file exists at all
|
|
try:
|
|
self.ftp.nlst(file)
|
|
except ftplib.error_perm, reason:
|
|
raise IOError, ('ftp error', reason), sys.exc_info()[2]
|
|
# Restore the transfer mode!
|
|
self.ftp.voidcmd(cmd)
|
|
# 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
|
|
if file: 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
|
|
|
|
def __repr__(self):
|
|
return '<%s at %s whose fp = %s>' % (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:
|
|
apply(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):
|
|
addbase.__init__(self, fp)
|
|
self.headers = headers
|
|
self.url = url
|
|
|
|
def info(self):
|
|
return self.headers
|
|
|
|
def geturl(self):
|
|
return self.url
|
|
|
|
|
|
def basejoin(base, url):
|
|
"""Utility to combine a URL with a base URL to form a new URL."""
|
|
type, path = splittype(url)
|
|
if type:
|
|
# if url is complete (i.e., it contains a type), return it
|
|
return url
|
|
host, path = splithost(path)
|
|
type, basepath = splittype(base) # inherit type from base
|
|
if host:
|
|
# if url contains host, just inherit type
|
|
if type: return type + '://' + host + path
|
|
else:
|
|
# no type inherited, so url must have started with //
|
|
# just return it
|
|
return url
|
|
host, basepath = splithost(basepath) # inherit host
|
|
basepath, basetag = splittag(basepath) # remove extraneous cruft
|
|
basepath, basequery = splitquery(basepath) # idem
|
|
if path[:1] != '/':
|
|
# non-absolute path name
|
|
if path[:1] in ('#', '?'):
|
|
# path is just a tag or query, attach to basepath
|
|
i = len(basepath)
|
|
else:
|
|
# else replace last component
|
|
i = basepath.rfind('/')
|
|
if i < 0:
|
|
# basepath not absolute
|
|
if host:
|
|
# host present, make absolute
|
|
basepath = '/'
|
|
else:
|
|
# else keep non-absolute
|
|
basepath = ''
|
|
else:
|
|
# remove last file component
|
|
basepath = basepath[:i+1]
|
|
# Interpret ../ (important because of symlinks)
|
|
while basepath and path[:3] == '../':
|
|
path = path[3:]
|
|
i = basepath[:-1].rfind('/')
|
|
if i > 0:
|
|
basepath = basepath[:i+1]
|
|
elif i == 0:
|
|
basepath = '/'
|
|
break
|
|
else:
|
|
basepath = ''
|
|
|
|
path = basepath + path
|
|
if host and path and path[0] != '/':
|
|
path = '/' + path
|
|
if type and host: return type + '://' + host + path
|
|
elif type: return type + ':' + path
|
|
elif host: return '//' + host + path # don't know what this means
|
|
else: return path
|
|
|
|
|
|
# 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'
|
|
# splitgophertype('/Xselector') --> 'X', 'selector'
|
|
# 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
|
|
|
|
def splitgophertype(selector):
|
|
"""splitgophertype('/Xselector') --> 'X', 'selector'."""
|
|
if selector[:1] == '/' and selector[1:2]:
|
|
return selector[1], selector[2:]
|
|
return None, selector
|
|
|
|
def unquote(s):
|
|
"""unquote('abc%20def') -> 'abc def'."""
|
|
mychr = chr
|
|
myatoi = int
|
|
list = s.split('%')
|
|
res = [list[0]]
|
|
myappend = res.append
|
|
del list[0]
|
|
for item in list:
|
|
if item[1:2]:
|
|
try:
|
|
myappend(mychr(myatoi(item[:2], 16))
|
|
+ item[2:])
|
|
except ValueError:
|
|
myappend('%' + item)
|
|
else:
|
|
myappend('%' + item)
|
|
return "".join(res)
|
|
|
|
def unquote_plus(s):
|
|
"""unquote('%7e/abc+def') -> '~/abc def'"""
|
|
if '+' in s:
|
|
# replace '+' with ' '
|
|
s = ' '.join(s.split('+'))
|
|
return unquote(s)
|
|
|
|
always_safe = ('ABCDEFGHIJKLMNOPQRSTUVWXYZ'
|
|
'abcdefghijklmnopqrstuvwxyz'
|
|
'0123456789' '_.-')
|
|
|
|
_fast_safe_test = always_safe + '/'
|
|
_fast_safe = None
|
|
|
|
def _fast_quote(s):
|
|
global _fast_safe
|
|
if _fast_safe is None:
|
|
_fast_safe = {}
|
|
for c in _fast_safe_test:
|
|
_fast_safe[c] = c
|
|
res = list(s)
|
|
for i in range(len(res)):
|
|
c = res[i]
|
|
if not c in _fast_safe:
|
|
res[i] = '%%%02X' % ord(c)
|
|
return ''.join(res)
|
|
|
|
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.
|
|
"""
|
|
safe = always_safe + safe
|
|
if _fast_safe_test == safe:
|
|
return _fast_quote(s)
|
|
res = list(s)
|
|
for i in range(len(res)):
|
|
c = res[i]
|
|
if c not in safe:
|
|
res[i] = '%%%02X' % ord(c)
|
|
return ''.join(res)
|
|
|
|
def quote_plus(s, safe = ''):
|
|
"""Quote the query fragment of a URL; replacing ' ' with '+'"""
|
|
if ' ' in s:
|
|
l = s.split(' ')
|
|
for i in range(len(l)):
|
|
l[i] = quote(l[i], safe)
|
|
return '+'.join(l)
|
|
else:
|
|
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.
|
|
|
|
"""
|
|
proxies = {}
|
|
for name, value in os.environ.items():
|
|
name = name.lower()
|
|
if value and name[-6:] == '_proxy':
|
|
proxies[name[:-6]] = value
|
|
return proxies
|
|
|
|
if os.name == 'mac':
|
|
def getproxies():
|
|
"""Return a dictionary of scheme -> proxy server URL mappings.
|
|
|
|
By convention the mac uses Internet Config to store
|
|
proxies. An HTTP proxy, for instance, is stored under
|
|
the HttpProxy key.
|
|
|
|
"""
|
|
try:
|
|
import ic
|
|
except ImportError:
|
|
return {}
|
|
|
|
try:
|
|
config = ic.IC()
|
|
except ic.error:
|
|
return {}
|
|
proxies = {}
|
|
# HTTP:
|
|
if 'UseHTTPProxy' in config and config['UseHTTPProxy']:
|
|
try:
|
|
value = config['HTTPProxyHost']
|
|
except ic.error:
|
|
pass
|
|
else:
|
|
proxies['http'] = 'http://%s' % value
|
|
# FTP: XXXX To be done.
|
|
# Gopher: XXXX To be done.
|
|
return proxies
|
|
|
|
def proxy_bypass(x):
|
|
return 0
|
|
|
|
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['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(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.
|
|
host = [host]
|
|
try:
|
|
addr = socket.gethostbyname(host[0])
|
|
if addr != host:
|
|
host.append(addr)
|
|
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
|
|
|
|
else:
|
|
# By default use environment variables
|
|
getproxies = getproxies_environment
|
|
|
|
def proxy_bypass(host):
|
|
return 0
|
|
|
|
# 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 `s`
|
|
print `qs`
|
|
print `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.python.org/pub/python/README',
|
|
## 'gopher://gopher.micro.umn.edu/1/',
|
|
'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()
|