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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
from bzrlib import ui
from bzrlib.errors import NoSuchFile
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,
)
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."""
super(HttpTransport_urllib, self).__init__(base)
if from_transport is not None:
self._accept_ranges = from_transport._accept_ranges
self._connection = from_transport._connection
self._user = from_transport._user
self._password = from_transport._password
self._opener = from_transport._opener
else:
self._accept_ranges = True
self._connection = None
self._user = None
self._password = None
self._opener = self._opener_class()
def ask_password(self, request):
"""Ask for a password if none is already provided in the request"""
# TODO: jam 20060915 There should be a test that asserts we ask
# for a password at the right time.
if request.password is None:
# We can't predict realm, let's try None, we'll get a
# 401 if we are wrong anyway
realm = None
host = request.get_host()
password_manager = self._opener.password_manager
# Query the password manager first
user, password = password_manager.find_user_password(None, host)
if user == request.user and password is not None:
request.password = password
else:
# Ask the user if we MUST
http_pass = 'HTTP %(user)s@%(host)s password'
request.password = ui.ui_factory.get_password(prompt=http_pass,
user=request.user,
host=host)
password_manager.add_password(None, host,
request.user, request.password)
def _perform(self, request):
"""Send the request to the server and handles common errors."""
if self._connection is not None:
# Give back shared info
request.connection = self._connection
if self._user is not None:
request.user = self._user
request.password = self._password
elif request.user is not None:
# We will issue our first request, time to ask for a
# password if needed
self.ask_password(request)
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
self._user = request.user
self._password = request.password
if request.redirected_to is not None:
# TODO: Update the transport so that subsequent
# requests goes directly to the right host
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:
bytes = 'bytes=' + self.range_header(ranges, tail_amount)
headers = {'Range': bytes}
request = Request('GET', abspath, None, headers)
response = self._perform(request)
code = response.code
if code == 404: # not found
# FIXME: Check that there is really no message to be read
self._connection.fake_close()
raise 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 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
# FIXME: 302 MAY have been already processed by the
# redirection handler
if code in (200, 302): # "ok", "found"
return True
else:
assert(code == 404, 'Only 200, 404 or may be 302 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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