1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
|
# 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
|