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# Copyright (C) 2005, 2006 Canonical Ltd
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
from cStringIO import StringIO
import urllib
import urlparse
from bzrlib import errors
from bzrlib.trace import mutter
from bzrlib.transport import register_urlparse_netloc_protocol
from bzrlib.transport.http import HttpTransportBase
# TODO: handle_response should be integrated into the _urllib2_wrappers
from bzrlib.transport.http.response import handle_response
from bzrlib.transport.http._urllib2_wrappers import (
Opener,
Request,
extract_authentication_uri,
extract_credentials,
)
register_urlparse_netloc_protocol('http+urllib')
class HttpTransport_urllib(HttpTransportBase):
"""Python urllib transport for http and https."""
# In order to debug we have to issue our traces in sync with
# httplib, which use print :(
_debuglevel = 0
_opener_class = Opener
def __init__(self, base, from_transport=None):
"""Set the base path where files will be stored."""
if from_transport is not None:
super(HttpTransport_urllib, self).__init__(base, from_transport)
self._connection = from_transport._connection
self._auth = from_transport._auth
self._proxy_auth = from_transport._proxy_auth
self._opener = from_transport._opener
else:
# urllib2 will be confused if it find authentication
# info in the urls. So we handle them separatly.
# Note: we don't need to when cloning because it was
# already done.
clean_base, user, password = extract_credentials(base)
super(HttpTransport_urllib, self).__init__(clean_base,
from_transport)
self._connection = None
self._opener = self._opener_class()
authuri = extract_authentication_uri(self._real_abspath(self._path))
self._auth = {'user': user, 'password': password,
'authuri': authuri}
if user and password is not None: # '' is a valid password
# Make the (user, password) available to urllib2
# We default to a realm of None to catch them all.
self._opener.password_manager.add_password(None, authuri,
user, password)
self._proxy_auth = {}
def _perform(self, request):
"""Send the request to the server and handles common errors.
:returns: urllib2 Response object
"""
if self._connection is not None:
# Give back shared info
request.connection = self._connection
# Ensure authentication info is provided
request.auth = self._auth
request.proxy_auth = self._proxy_auth
mutter('%s: [%s]' % (request.method, request.get_full_url()))
if self._debuglevel > 0:
print 'perform: %s base: %s, url: %s' % (request.method, self.base,
request.get_full_url())
response = self._opener.open(request)
if self._connection is None:
# Acquire connection when the first request is able
# to connect to the server
self._connection = request.connection
# Always get auth parameters, they may change
self._auth = request.auth
self._proxy_auth = request.proxy_auth
code = response.code
if request.follow_redirections is False \
and code in (301, 302, 303, 307):
raise errors.RedirectRequested(request.get_full_url(),
request.redirected_to,
is_permament=(code == 301),
qual_proto=self._qualified_proto)
if request.redirected_to is not None:
mutter('redirected from: %s to: %s' % (request.get_full_url(),
request.redirected_to))
return response
def _get(self, relpath, ranges, tail_amount=0):
"""See HttpTransport._get"""
abspath = self._real_abspath(relpath)
headers = {}
if ranges or tail_amount:
range_header = self.attempted_range_header(ranges, tail_amount)
if range_header is not None:
bytes = 'bytes=' + range_header
headers = {'Range': bytes}
request = Request('GET', abspath, None, headers)
response = self._perform(request)
code = response.code
if code == 404: # not found
self._connection.fake_close()
raise errors.NoSuchFile(abspath)
data = handle_response(abspath, code, response.headers, response)
# Close response to free the httplib.HTTPConnection pipeline
self._connection.fake_close()
return code, data
def _post(self, body_bytes):
abspath = self._real_abspath('.bzr/smart')
response = self._perform(Request('POST', abspath, body_bytes))
code = response.code
data = handle_response(abspath, code, response.headers, response)
# Close response to free the httplib.HTTPConnection pipeline
self._connection.fake_close()
return code, data
def should_cache(self):
"""Return True if the data pulled across should be cached locally.
"""
return True
def _head(self, relpath):
"""Request the HEAD of a file.
Performs the request and leaves callers handle the results.
"""
abspath = self._real_abspath(relpath)
request = Request('HEAD', abspath)
response = self._perform(request)
self._connection.fake_close()
return response
def has(self, relpath):
"""Does the target location exist?
"""
response = self._head(relpath)
code = response.code
if code == 200: # "ok",
return True
else:
assert(code == 404, 'Only 200 or 404 are correct')
return False
def get_test_permutations():
"""Return the permutations to be used in testing."""
from bzrlib.tests.HttpServer import HttpServer_urllib
return [(HttpTransport_urllib, HttpServer_urllib),
]
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