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# Copyright (C) 2005, 2006, 2007 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
from cStringIO import StringIO
import urllib
import urlparse
from bzrlib import (
errors,
trace,
urlutils,
)
from bzrlib.transport import http
# TODO: handle_response should be integrated into the http/__init__.py
from bzrlib.transport.http.response import handle_response
from bzrlib.transport.http._urllib2_wrappers import (
Opener,
Request,
)
class HttpTransport_urllib(http.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):
super(HttpTransport_urllib, self).__init__(
base, 'urllib', _from_transport=_from_transport)
if _from_transport is not None:
self._opener = _from_transport._opener
else:
self._opener = self._opener_class(
report_activity=self._report_activity)
def _perform(self, request):
"""Send the request to the server and handles common errors.
:returns: urllib2 Response object
"""
connection = self._get_connection()
if connection is not None:
# Give back shared info
request.connection = connection
(auth, proxy_auth) = self._get_credentials()
# Clean the httplib.HTTPConnection pipeline in case the previous
# request couldn't do it
connection.cleanup_pipe()
else:
# First request, initialize credentials.
# scheme and realm will be set by the _urllib2_wrappers.AuthHandler
auth = self._create_auth()
# Proxy initialization will be done by the first proxied request
proxy_auth = dict()
# Ensure authentication info is provided
request.auth = auth
request.proxy_auth = proxy_auth
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._get_connection() is not request.connection:
# First connection or reconnection
self._set_connection(request.connection,
(request.auth, request.proxy_auth))
else:
# http may change the credentials while keeping the
# connection opened
self._update_credentials((request.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_permanent=(code == 301))
if request.redirected_to is not None:
trace.mutter('redirected from: %s to: %s' % (request.get_full_url(),
request.redirected_to))
return response
def _get(self, relpath, offsets, tail_amount=0):
"""See HttpTransport._get"""
abspath = self._remote_path(relpath)
headers = {}
accepted_errors = [200, 404]
if offsets or tail_amount:
range_header = self._attempted_range_header(offsets, tail_amount)
if range_header is not None:
accepted_errors.append(206)
accepted_errors.append(400)
accepted_errors.append(416)
bytes = 'bytes=' + range_header
headers = {'Range': bytes}
request = Request('GET', abspath, None, headers,
accepted_errors=accepted_errors)
response = self._perform(request)
code = response.code
if code == 404: # not found
raise errors.NoSuchFile(abspath)
elif code in (400, 416):
# We don't know which, but one of the ranges we specified was
# wrong.
raise errors.InvalidHttpRange(abspath, range_header,
'Server return code %d' % code)
data = handle_response(abspath, code, response.info(), response)
return code, data
def _post(self, body_bytes):
abspath = self._remote_path('.bzr/smart')
# We include 403 in accepted_errors so that send_http_smart_request can
# handle a 403. Otherwise a 403 causes an unhandled TransportError.
response = self._perform(Request('POST', abspath, body_bytes,
accepted_errors=[200, 403]))
code = response.code
data = handle_response(abspath, code, response.info(), response)
return code, data
def _head(self, relpath):
"""Request the HEAD of a file.
Performs the request and leaves callers handle the results.
"""
abspath = self._remote_path(relpath)
request = Request('HEAD', abspath,
accepted_errors=[200, 404])
response = self._perform(request)
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:
return False
def get_test_permutations():
"""Return the permutations to be used in testing."""
from bzrlib import tests
from bzrlib.tests import http_server
permutations = [(HttpTransport_urllib, http_server.HttpServer_urllib),]
if tests.HTTPSServerFeature.available():
from bzrlib.tests import https_server
permutations.append((HttpTransport_urllib,
https_server.HTTPSServer_urllib))
return permutations
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