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- # Source Generated with Decompyle++
- # File: in.pyc (Python 2.3)
-
- '''An extensible library for opening URLs using a variety of protocols
-
- The simplest way to use this module is to call the urlopen function,
- which accepts a string containing a URL or a Request object (described
- below). It opens the URL and returns the results as file-like
- object; the returned object has some extra methods described below.
-
- The OpenerDirector manages a collection of Handler objects that do
- all the actual work. Each Handler implements a particular protocol or
- option. The OpenerDirector is a composite object that invokes the
- Handlers needed to open the requested URL. For example, the
- HTTPHandler performs HTTP GET and POST requests and deals with
- non-error returns. The HTTPRedirectHandler automatically deals with
- HTTP 301, 302, 303 and 307 redirect errors, and the HTTPDigestAuthHandler
- deals with digest authentication.
-
- urlopen(url, data=None) -- basic usage is that same as original
- urllib. pass the url and optionally data to post to an HTTP URL, and
- get a file-like object back. One difference is that you can also pass
- a Request instance instead of URL. Raises a URLError (subclass of
- IOError); for HTTP errors, raises an HTTPError, which can also be
- treated as a valid response.
-
- build_opener -- function that creates a new OpenerDirector instance.
- will install the default handlers. accepts one or more Handlers as
- arguments, either instances or Handler classes that it will
- instantiate. if one of the argument is a subclass of the default
- handler, the argument will be installed instead of the default.
-
- install_opener -- installs a new opener as the default opener.
-
- objects of interest:
- OpenerDirector --
-
- Request -- an object that encapsulates the state of a request. the
- state can be a simple as the URL. it can also include extra HTTP
- headers, e.g. a User-Agent.
-
- BaseHandler --
-
- exceptions:
- URLError-- a subclass of IOError, individual protocols have their own
- specific subclass
-
- HTTPError-- also a valid HTTP response, so you can treat an HTTP error
- as an exceptional event or valid response
-
- internals:
- BaseHandler and parent
- _call_chain conventions
-
- Example usage:
-
- import urllib2
-
- # set up authentication info
- authinfo = urllib2.HTTPBasicAuthHandler()
- authinfo.add_password(\'realm\', \'host\', \'username\', \'password\')
-
- proxy_support = urllib2.ProxyHandler({"http" : "http://ahad-haam:3128"})
-
- # build a new opener that adds authentication and caching FTP handlers
- opener = urllib2.build_opener(proxy_support, authinfo, urllib2.CacheFTPHandler)
-
- # install it
- urllib2.install_opener(opener)
-
- f = urllib2.urlopen(\'http://www.python.org/\')
-
-
- '''
- import socket
- import httplib
- import inspect
- import re
- import base64
- import urlparse
- import md5
- import mimetypes
- import mimetools
- import rfc822
- import ftplib
- import sys
- import time
- import os
- import gopherlib
- import posixpath
-
- try:
- from cStringIO import StringIO
- except ImportError:
- from StringIO import StringIO
-
-
- try:
- import sha
- except ImportError:
- sha = None
-
- from urllib import unwrap, unquote, splittype, splithost, addinfourl, splitport, splitgophertype, splitquery, splitattr, ftpwrapper, noheaders
- from urllib import getproxies
- from urllib import localhost, url2pathname
- __version__ = '2.0a1'
- _opener = None
-
- def urlopen(url, data = None):
- global _opener
- if _opener is None:
- _opener = build_opener()
-
- return _opener.open(url, data)
-
-
- def install_opener(opener):
- global _opener
- _opener = opener
-
-
- class URLError(IOError):
-
- def __init__(self, reason):
- self.reason = reason
-
-
- def __str__(self):
- return '<urlopen error %s>' % self.reason
-
-
-
- class HTTPError(URLError, addinfourl):
- '''Raised when HTTP error occurs, but also acts like non-error return'''
- __super_init = addinfourl.__init__
-
- def __init__(self, url, code, msg, hdrs, fp):
- self.code = code
- self.msg = msg
- self.hdrs = hdrs
- self.fp = fp
- self.filename = url
- if fp is not None:
- self._HTTPError__super_init(fp, hdrs, url)
-
-
-
- def __str__(self):
- return 'HTTP Error %s: %s' % (self.code, self.msg)
-
-
- def __del__(self):
- if self.fp:
- self.fp.close()
-
-
-
-
- class GopherError(URLError):
- pass
-
-
- class Request:
-
- def __init__(self, url, data = None, headers = { }):
- self._Request__original = unwrap(url)
- self.type = None
- self.host = None
- self.port = None
- self.data = data
- self.headers = { }
- for key, value in headers.items():
- self.add_header(key, value)
-
-
-
- def __getattr__(self, attr):
- if attr[:12] == '_Request__r_':
- name = attr[12:]
- if hasattr(Request, 'get_' + name):
- getattr(self, 'get_' + name)()
- return getattr(self, attr)
-
-
- raise AttributeError, attr
-
-
- def get_method(self):
- if self.has_data():
- return 'POST'
- else:
- return 'GET'
-
-
- def add_data(self, data):
- self.data = data
-
-
- def has_data(self):
- return self.data is not None
-
-
- def get_data(self):
- return self.data
-
-
- def get_full_url(self):
- return self._Request__original
-
-
- def get_type(self):
- if self.type is None:
- (self.type, self._Request__r_type) = splittype(self._Request__original)
- if self.type is None:
- raise ValueError, 'unknown url type: %s' % self._Request__original
-
-
- return self.type
-
-
- def get_host(self):
- if self.host is None:
- (self.host, self._Request__r_host) = splithost(self._Request__r_type)
- if self.host:
- self.host = unquote(self.host)
-
-
- return self.host
-
-
- def get_selector(self):
- return self._Request__r_host
-
-
- def set_proxy(self, host, type):
- (self.host, self.type) = (host, type)
- self._Request__r_host = self._Request__original
-
-
- def add_header(self, key, val):
- self.headers[key.capitalize()] = val
-
-
-
- class OpenerDirector:
-
- def __init__(self):
- server_version = 'Python-urllib/%s' % __version__
- self.addheaders = [
- ('User-agent', server_version)]
- self.handlers = []
- self.handle_open = { }
- self.handle_error = { }
-
-
- def add_handler(self, handler):
- added = 0
- for meth in dir(handler):
- if meth[-5:] == '_open':
- protocol = meth[:-5]
- if protocol in self.handle_open:
- self.handle_open[protocol].append(handler)
- self.handle_open[protocol].sort()
- else:
- self.handle_open[protocol] = [
- handler]
- added = 1
- continue
-
- i = meth.find('_')
- j = meth[i + 1:].find('_') + i + 1
- if j != -1 and meth[i + 1:j] == 'error':
- proto = meth[:i]
- kind = meth[j + 1:]
-
- try:
- kind = int(kind)
- except ValueError:
- pass
-
- dict = self.handle_error.get(proto, { })
- if kind in dict:
- dict[kind].append(handler)
- dict[kind].sort()
- else:
- dict[kind] = [
- handler]
- self.handle_error[proto] = dict
- added = 1
- continue
- continue
-
- if added:
- self.handlers.append(handler)
- self.handlers.sort()
- handler.add_parent(self)
-
-
-
- def __del__(self):
- self.close()
-
-
- def close(self):
- for handler in self.handlers:
- handler.close()
-
- self.handlers = []
-
-
- def _call_chain(self, chain, kind, meth_name, *args):
- handlers = chain.get(kind, ())
- for handler in handlers:
- func = getattr(handler, meth_name)
- result = func(*args)
- if result is not None:
- return result
- continue
-
-
-
- def open(self, fullurl, data = None):
- if isinstance(fullurl, basestring):
- req = Request(fullurl, data)
- else:
- req = fullurl
- if data is not None:
- req.add_data(data)
-
- result = self._call_chain(self.handle_open, 'default', 'default_open', req)
- if result:
- return result
-
- type_ = req.get_type()
- result = self._call_chain(self.handle_open, type_, type_ + '_open', req)
- if result:
- return result
-
- return self._call_chain(self.handle_open, 'unknown', 'unknown_open', req)
-
-
- def error(self, proto, *args):
- if proto in [
- 'http',
- 'https']:
- dict = self.handle_error['http']
- proto = args[2]
- meth_name = 'http_error_%d' % proto
- http_err = 1
- orig_args = args
- else:
- dict = self.handle_error
- meth_name = proto + '_error'
- http_err = 0
- args = (dict, proto, meth_name) + args
- result = self._call_chain(*args)
- if result:
- return result
-
- if http_err:
- args = (dict, 'default', 'http_error_default') + orig_args
- return self._call_chain(*args)
-
-
-
-
- def build_opener(*handlers):
- '''Create an opener object from a list of handlers.
-
- The opener will use several default handlers, including support
- for HTTP and FTP.
-
- If any of the handlers passed as arguments are subclasses of the
- default handlers, the default handlers will not be used.
- '''
- opener = OpenerDirector()
- default_classes = [
- ProxyHandler,
- UnknownHandler,
- HTTPHandler,
- HTTPDefaultErrorHandler,
- HTTPRedirectHandler,
- FTPHandler,
- FileHandler]
- if hasattr(httplib, 'HTTPS'):
- default_classes.append(HTTPSHandler)
-
- skip = []
- for klass in default_classes:
- for check in handlers:
- if inspect.isclass(check):
- if issubclass(check, klass):
- skip.append(klass)
-
- issubclass(check, klass)
- if isinstance(check, klass):
- skip.append(klass)
- continue
-
-
- for klass in skip:
- default_classes.remove(klass)
-
- for klass in default_classes:
- opener.add_handler(klass())
-
- for h in handlers:
- if inspect.isclass(h):
- h = h()
-
- opener.add_handler(h)
-
- return opener
-
-
- class BaseHandler:
- handler_order = 500
-
- def add_parent(self, parent):
- self.parent = parent
-
-
- def close(self):
- self.parent = None
-
-
- def __lt__(self, other):
- if not hasattr(other, 'handler_order'):
- return True
-
- return self.handler_order < other.handler_order
-
-
-
- class HTTPDefaultErrorHandler(BaseHandler):
-
- def http_error_default(self, req, fp, code, msg, hdrs):
- raise HTTPError(req.get_full_url(), code, msg, hdrs, fp)
-
-
-
- class HTTPRedirectHandler(BaseHandler):
-
- def redirect_request(self, req, fp, code, msg, headers, newurl):
- """Return a Request or None in response to a redirect.
-
- This is called by the http_error_30x methods when a
- redirection response is received. If a redirection should
- take place, return a new Request to allow http_error_30x to
- perform the redirect. Otherwise, raise HTTPError if no-one
- else should try to handle this url. Return None if you can't
- but another Handler might.
- """
- m = req.get_method()
- if code in (301, 302, 303, 307) and m in ('GET', 'HEAD') and code in (301, 302, 303) and m == 'POST':
- return Request(newurl, headers = req.headers)
- else:
- raise HTTPError(req.get_full_url(), code, msg, headers, fp)
-
-
- def http_error_302(self, req, fp, code, msg, headers):
- if 'location' in headers:
- newurl = headers['location']
- elif 'uri' in headers:
- newurl = headers['uri']
- else:
- return None
- newurl = urlparse.urljoin(req.get_full_url(), newurl)
- new = self.redirect_request(req, fp, code, msg, headers, newurl)
- if new is None:
- return None
-
- new.error_302_dict = { }
- if hasattr(req, 'error_302_dict'):
- if len(req.error_302_dict) > 10 or newurl in req.error_302_dict:
- raise HTTPError(req.get_full_url(), code, self.inf_msg + msg, headers, fp)
-
- new.error_302_dict.update(req.error_302_dict)
-
- new.error_302_dict[newurl] = newurl
- fp.read()
- fp.close()
- return self.parent.open(new)
-
- http_error_301 = http_error_303 = http_error_307 = http_error_302
- inf_msg = 'The HTTP server returned a redirect error that would lead to an infinite loop.\nThe last 30x error message was:\n'
-
-
- class ProxyHandler(BaseHandler):
- handler_order = 100
-
- def __init__(self, proxies = None):
- if proxies is None:
- proxies = getproxies()
-
- if not hasattr(proxies, 'has_key'):
- raise AssertionError, 'proxies must be a mapping'
- self.proxies = proxies
- for type, url in proxies.items():
- setattr(self, '%s_open' % type, (lambda r, proxy = url, type = type, meth = self.proxy_open: meth(r, proxy, type)))
-
-
-
- def proxy_open(self, req, proxy, type):
- orig_type = req.get_type()
- (type, r_type) = splittype(proxy)
- (host, XXX) = splithost(r_type)
- if '@' in host:
- (user_pass, host) = host.split('@', 1)
- if ':' in user_pass:
- (user, password) = user_pass.split(':', 1)
- user_pass = base64.encodestring('%s:%s' % (unquote(user), unquote(password)))
- req.add_header('Proxy-authorization', 'Basic ' + user_pass)
-
-
- host = unquote(host)
- req.set_proxy(host, type)
- if orig_type == type:
- return None
- else:
- return self.parent.open(req)
-
-
-
- class CustomProxy:
-
- def __init__(self, proto, func = None, proxy_addr = None):
- self.proto = proto
- self.func = func
- self.addr = proxy_addr
-
-
- def handle(self, req):
- if self.func and self.func(req):
- return 1
-
-
-
- def get_proxy(self):
- return self.addr
-
-
-
- class CustomProxyHandler(BaseHandler):
- handler_order = 100
-
- def __init__(self, *proxies):
- self.proxies = { }
-
-
- def proxy_open(self, req):
- proto = req.get_type()
-
- try:
- proxies = self.proxies[proto]
- except KeyError:
- return None
-
- for p in proxies:
- if p.handle(req):
- req.set_proxy(p.get_proxy())
- return self.parent.open(req)
- continue
-
- return None
-
-
- def do_proxy(self, p, req):
- return self.parent.open(req)
-
-
- def add_proxy(self, cpo):
- if cpo.proto in self.proxies:
- self.proxies[cpo.proto].append(cpo)
- else:
- self.proxies[cpo.proto] = [
- cpo]
-
-
-
- class HTTPPasswordMgr:
-
- def __init__(self):
- self.passwd = { }
-
-
- def add_password(self, realm, uri, user, passwd):
- if isinstance(uri, basestring):
- uri = [
- uri]
-
- uri = tuple(map(self.reduce_uri, uri))
- if not (realm in self.passwd):
- self.passwd[realm] = { }
-
- self.passwd[realm][uri] = (user, passwd)
-
-
- def find_user_password(self, realm, authuri):
- domains = self.passwd.get(realm, { })
- authuri = self.reduce_uri(authuri)
- for uris, authinfo in domains.iteritems():
- for uri in uris:
- if self.is_suburi(uri, authuri):
- return authinfo
- continue
-
-
- return (None, None)
-
-
- def reduce_uri(self, uri):
- '''Accept netloc or URI and extract only the netloc and path'''
- parts = urlparse.urlparse(uri)
- if parts[1]:
- if not parts[2]:
- pass
- return (parts[1], '/')
- else:
- return (parts[2], '/')
-
-
- def is_suburi(self, base, test):
- '''Check if test is below base in a URI tree
-
- Both args must be URIs in reduced form.
- '''
- if base == test:
- return True
-
- if base[0] != test[0]:
- return False
-
- common = posixpath.commonprefix((base[1], test[1]))
- if len(common) == len(base[1]):
- return True
-
- return False
-
-
-
- class HTTPPasswordMgrWithDefaultRealm(HTTPPasswordMgr):
-
- def find_user_password(self, realm, authuri):
- (user, password) = HTTPPasswordMgr.find_user_password(self, realm, authuri)
- if user is not None:
- return (user, password)
-
- return HTTPPasswordMgr.find_user_password(self, None, authuri)
-
-
-
- class AbstractBasicAuthHandler:
- rx = re.compile('[ \t]*([^ \t]+)[ \t]+realm="([^"]*)"', re.I)
-
- def __init__(self, password_mgr = None):
- if password_mgr is None:
- password_mgr = HTTPPasswordMgr()
-
- self.passwd = password_mgr
- self.add_password = self.passwd.add_password
-
-
- def http_error_auth_reqed(self, authreq, host, req, headers):
- authreq = headers.get(authreq, None)
- if authreq:
- mo = AbstractBasicAuthHandler.rx.match(authreq)
- if mo:
- (scheme, realm) = mo.groups()
- if scheme.lower() == 'basic':
- return self.retry_http_basic_auth(host, req, realm)
-
-
-
-
-
- def retry_http_basic_auth(self, host, req, realm):
- (user, pw) = self.passwd.find_user_password(realm, host)
- if pw:
- raw = '%s:%s' % (user, pw)
- auth = 'Basic %s' % base64.encodestring(raw).strip()
- if req.headers.get(self.auth_header, None) == auth:
- return None
-
- req.add_header(self.auth_header, auth)
- return self.parent.open(req)
- else:
- return None
-
-
-
- class HTTPBasicAuthHandler(AbstractBasicAuthHandler, BaseHandler):
- auth_header = 'Authorization'
-
- def http_error_401(self, req, fp, code, msg, headers):
- host = urlparse.urlparse(req.get_full_url())[1]
- return self.http_error_auth_reqed('www-authenticate', host, req, headers)
-
-
-
- class ProxyBasicAuthHandler(AbstractBasicAuthHandler, BaseHandler):
- auth_header = 'Proxy-authorization'
-
- def http_error_407(self, req, fp, code, msg, headers):
- host = req.get_host()
- return self.http_error_auth_reqed('proxy-authenticate', host, req, headers)
-
-
-
- class AbstractDigestAuthHandler:
-
- def __init__(self, passwd = None):
- if passwd is None:
- passwd = HTTPPasswordMgr()
-
- self.passwd = passwd
- self.add_password = self.passwd.add_password
-
-
- def http_error_auth_reqed(self, authreq, host, req, headers):
- authreq = headers.get(self.auth_header, None)
- if authreq:
- kind = authreq.split()[0]
- if kind == 'Digest':
- return self.retry_http_digest_auth(req, authreq)
-
-
-
-
- def retry_http_digest_auth(self, req, auth):
- (token, challenge) = auth.split(' ', 1)
- chal = parse_keqv_list(parse_http_list(challenge))
- auth = self.get_authorization(req, chal)
- if auth:
- auth_val = 'Digest %s' % auth
- if req.headers.get(self.auth_header, None) == auth_val:
- return None
-
- req.add_header(self.auth_header, auth_val)
- resp = self.parent.open(req)
- return resp
-
-
-
- def get_authorization(self, req, chal):
-
- try:
- realm = chal['realm']
- nonce = chal['nonce']
- algorithm = chal.get('algorithm', 'MD5')
- opaque = chal.get('opaque', None)
- except KeyError:
- return None
-
- (H, KD) = self.get_algorithm_impls(algorithm)
- if H is None:
- return None
-
- (user, pw) = self.passwd.find_user_password(realm, req.get_full_url())
- if user is None:
- return None
-
- if req.has_data():
- entdig = self.get_entity_digest(req.get_data(), chal)
- else:
- entdig = None
- A1 = '%s:%s:%s' % (user, realm, pw)
- if not req.has_data() and 'POST':
- pass
- A2 = '%s:%s' % ('GET', req.get_selector())
- respdig = KD(H(A1), '%s:%s' % (nonce, H(A2)))
- base = 'username="%s", realm="%s", nonce="%s", uri="%s", response="%s"' % (user, realm, nonce, req.get_selector(), respdig)
- if opaque:
- base = base + ', opaque="%s"' % opaque
-
- if entdig:
- base = base + ', digest="%s"' % entdig
-
- if algorithm != 'MD5':
- base = base + ', algorithm="%s"' % algorithm
-
- return base
-
-
- def get_algorithm_impls(self, algorithm):
- if algorithm == 'MD5':
-
- H = lambda x, e = encode_digest: e(md5.new(x).digest())
- elif algorithm == 'SHA':
-
- H = lambda x, e = encode_digest: e(sha.new(x).digest())
-
-
- KD = lambda s, d, H = H: H('%s:%s' % (s, d))
- return (H, KD)
-
-
- def get_entity_digest(self, data, chal):
- return None
-
-
-
- class HTTPDigestAuthHandler(BaseHandler, AbstractDigestAuthHandler):
- '''An authentication protocol defined by RFC 2069
-
- Digest authentication improves on basic authentication because it
- does not transmit passwords in the clear.
- '''
- auth_header = 'Authorization'
-
- def http_error_401(self, req, fp, code, msg, headers):
- host = urlparse.urlparse(req.get_full_url())[1]
- self.http_error_auth_reqed('www-authenticate', host, req, headers)
-
-
-
- class ProxyDigestAuthHandler(BaseHandler, AbstractDigestAuthHandler):
- auth_header = 'Proxy-Authorization'
-
- def http_error_407(self, req, fp, code, msg, headers):
- host = req.get_host()
- self.http_error_auth_reqed('proxy-authenticate', host, req, headers)
-
-
-
- def encode_digest(digest):
- hexrep = []
- for c in digest:
- n = ord(c) >> 4 & 15
- hexrep.append(hex(n)[-1])
- n = ord(c) & 15
- hexrep.append(hex(n)[-1])
-
- return ''.join(hexrep)
-
-
- class AbstractHTTPHandler(BaseHandler):
-
- def do_open(self, http_class, req):
- host = req.get_host()
- if not host:
- raise URLError('no host given')
-
- h = http_class(host)
- if req.has_data():
- data = req.get_data()
- h.putrequest('POST', req.get_selector())
- if not ('Content-type' in req.headers):
- h.putheader('Content-type', 'application/x-www-form-urlencoded')
-
- if not ('Content-length' in req.headers):
- h.putheader('Content-length', '%d' % len(data))
-
- else:
- h.putrequest('GET', req.get_selector())
- (scheme, sel) = splittype(req.get_selector())
- (sel_host, sel_path) = splithost(sel)
- if not sel_host:
- pass
- h.putheader('Host', host)
- for name, value in self.parent.addheaders:
- name = name.capitalize()
- if name not in req.headers:
- h.putheader(name, value)
- continue
-
- for k, v in req.headers.items():
- h.putheader(k, v)
-
-
- try:
- h.endheaders()
- except socket.error:
- err = None
- raise URLError(err)
-
- if req.has_data():
- h.send(data)
-
- (code, msg, hdrs) = h.getreply()
- fp = h.getfile()
- if code == 200:
- return addinfourl(fp, hdrs, req.get_full_url())
- else:
- return self.parent.error('http', req, fp, code, msg, hdrs)
-
-
-
- class HTTPHandler(AbstractHTTPHandler):
-
- def http_open(self, req):
- return self.do_open(httplib.HTTP, req)
-
-
- if hasattr(httplib, 'HTTPS'):
-
- class HTTPSHandler(AbstractHTTPHandler):
-
- def https_open(self, req):
- return self.do_open(httplib.HTTPS, req)
-
-
-
-
- class UnknownHandler(BaseHandler):
-
- def unknown_open(self, req):
- type = req.get_type()
- raise URLError('unknown url type: %s' % type)
-
-
-
- def parse_keqv_list(l):
- '''Parse list of key=value strings where keys are not duplicated.'''
- parsed = { }
- for elt in l:
- (k, v) = elt.split('=', 1)
- if v[0] == '"' and v[-1] == '"':
- v = v[1:-1]
-
- parsed[k] = v
-
- return parsed
-
-
- def parse_http_list(s):
- '''Parse lists as described by RFC 2068 Section 2.
-
- In particular, parse comman-separated lists where the elements of
- the list may include quoted-strings. A quoted-string could
- contain a comma.
- '''
- list = []
- end = len(s)
- i = 0
- inquote = 0
- start = 0
- while i < end:
- cur = s[i:]
- c = cur.find(',')
- q = cur.find('"')
- if c == -1:
- list.append(s[start:])
- break
-
- if q == -1:
- if inquote:
- raise ValueError, 'unbalanced quotes'
- else:
- list.append(s[start:i + c])
- i = i + c + 1
-
- if inquote:
- if q < c:
- list.append(s[start:i + c])
- i = i + c + 1
- start = i
- inquote = 0
- else:
- i = i + q
- q < c
- if c < q:
- list.append(s[start:i + c])
- i = i + c + 1
- start = i
- continue
- inquote = 1
- i = i + q + 1
- return map((lambda x: x.strip()), list)
-
-
- class FileHandler(BaseHandler):
-
- def file_open(self, req):
- url = req.get_selector()
- if url[:2] == '//' and url[2:3] != '/':
- req.type = 'ftp'
- return self.parent.open(req)
- else:
- return self.open_local_file(req)
-
- names = None
-
- def get_names(self):
- if FileHandler.names is None:
- FileHandler.names = (socket.gethostbyname('localhost'), socket.gethostbyname(socket.gethostname()))
-
- return FileHandler.names
-
-
- def open_local_file(self, req):
- host = req.get_host()
- file = req.get_selector()
- localfile = url2pathname(file)
- stats = os.stat(localfile)
- size = stats.st_size
- modified = rfc822.formatdate(stats.st_mtime)
- mtype = mimetypes.guess_type(file)[0]
- if not mtype:
- pass
- headers = mimetools.Message(StringIO('Content-type: %s\nContent-length: %d\nLast-modified: %s\n' % ('text/plain', size, modified)))
- if host:
- (host, port) = splitport(host)
-
- if not host and not port and socket.gethostbyname(host) in self.get_names():
- return addinfourl(open(localfile, 'rb'), headers, 'file:' + file)
-
- raise URLError('file not on local host')
-
-
-
- class FTPHandler(BaseHandler):
-
- def ftp_open(self, req):
- host = req.get_host()
- if not host:
- raise IOError, ('ftp error', 'no host given')
-
-
- try:
- host = socket.gethostbyname(host)
- except socket.error:
- msg = None
- raise URLError(msg)
-
- (host, port) = splitport(host)
- if port is None:
- port = ftplib.FTP_PORT
-
- (path, attrs) = splitattr(req.get_selector())
- path = unquote(path)
- dirs = path.split('/')
- (dirs, file) = (dirs[:-1], dirs[-1])
- if dirs and not dirs[0]:
- dirs = dirs[1:]
-
- user = passwd = ''
-
- try:
- fw = self.connect_ftp(user, passwd, host, port, dirs)
- if not file and 'I':
- pass
- type = 'D'
- for attr in attrs:
- (attr, value) = splitattr(attr)
- if attr.lower() == 'type' and value in ('a', 'A', 'i', 'I', 'd', 'D'):
- type = value.upper()
- continue
-
- (fp, retrlen) = fw.retrfile(file, type)
- headers = ''
- mtype = mimetypes.guess_type(req.get_full_url())[0]
- if mtype:
- headers += 'Content-type: %s\n' % mtype
-
- if retrlen is not None and retrlen >= 0:
- headers += 'Content-length: %d\n' % retrlen
-
- sf = StringIO(headers)
- headers = mimetools.Message(sf)
- return addinfourl(fp, headers, req.get_full_url())
- except ftplib.all_errors:
- msg = None
- raise IOError, ('ftp error', msg), sys.exc_info()[2]
-
-
-
- def connect_ftp(self, user, passwd, host, port, dirs):
- fw = ftpwrapper(user, passwd, host, port, dirs)
- return fw
-
-
-
- class CacheFTPHandler(FTPHandler):
-
- def __init__(self):
- self.cache = { }
- self.timeout = { }
- self.soonest = 0
- self.delay = 60
- self.max_conns = 16
-
-
- def setTimeout(self, t):
- self.delay = t
-
-
- def setMaxConns(self, m):
- self.max_conns = m
-
-
- def connect_ftp(self, user, passwd, host, port, dirs):
- key = (user, passwd, host, port)
- if key in self.cache:
- self.timeout[key] = time.time() + self.delay
- else:
- self.cache[key] = ftpwrapper(user, passwd, host, port, dirs)
- self.timeout[key] = time.time() + self.delay
- self.check_cache()
- return self.cache[key]
-
-
- def check_cache(self):
- t = time.time()
- if self.soonest <= t:
- for k, v in self.timeout.items():
- if v < t:
- self.cache[k].close()
- del self.cache[k]
- del self.timeout[k]
- continue
-
-
- self.soonest = min(self.timeout.values())
- if len(self.cache) == self.max_conns:
- for k, v in self.timeout.items():
- if v == self.soonest:
- del self.cache[k]
- del self.timeout[k]
- break
- continue
-
- self.soonest = min(self.timeout.values())
-
-
-
-
- class GopherHandler(BaseHandler):
-
- def gopher_open(self, req):
- host = req.get_host()
- if not host:
- raise GopherError('no host given')
-
- host = unquote(host)
- selector = req.get_selector()
- (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(), req.get_full_url())
-
-
-
- class OpenerFactory:
- default_handlers = [
- UnknownHandler,
- HTTPHandler,
- HTTPDefaultErrorHandler,
- HTTPRedirectHandler,
- FTPHandler,
- FileHandler]
- handlers = []
- replacement_handlers = []
-
- def add_handler(self, h):
- self.handlers = self.handlers + [
- h]
-
-
- def replace_handler(self, h):
- pass
-
-
- def build_opener(self):
- opener = OpenerDirector()
- for ph in self.default_handlers:
- if inspect.isclass(ph):
- ph = ph()
-
- opener.add_handler(ph)
-
-
-
- if __name__ == '__main__':
- if socket.gethostname() == 'bitdiddle':
- localhost = 'bitdiddle.cnri.reston.va.us'
- elif socket.gethostname() == 'bitdiddle.concentric.net':
- localhost = 'localhost'
- else:
- localhost = None
- urls = [
- 'gopher://gopher.lib.ncsu.edu/11/library/stacks/Alex',
- 'gopher://gopher.vt.edu:10010/10/33',
- 'file:/etc/passwd',
- 'file://nonsensename/etc/passwd',
- 'ftp://www.python.org/pub/python/misc/sousa.au',
- 'ftp://www.python.org/pub/tmp/blat',
- 'http://www.espn.com/',
- 'http://www.python.org/Spanish/Inquistion/',
- ('http://www.python.org/cgi-bin/faqw.py', 'query=pythonistas&querytype=simple&casefold=yes&req=search'),
- 'http://www.python.org/',
- 'ftp://gatekeeper.research.compaq.com/pub/DEC/SRC/research-reports/00README-Legal-Rules-Regs']
- cfh = CacheFTPHandler()
- cfh.setTimeout(1)
- install_opener(build_opener(cfh, GopherHandler))
- for url in urls:
- if isinstance(url, tuple):
- (url, req) = url
- else:
- req = None
- print url
-
- try:
- f = urlopen(url, req)
- except IOError:
- err = None
- print 'IOError:', err
- except socket.error:
- err = None
- print 'socket.error:', err
-
- buf = f.read()
- f.close()
- print 'read %d bytes' % len(buf)
- print
- time.sleep(0.10000000000000001)
-
-
-