~bzr-pqm/bzr/bzr.dev

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
# 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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  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, _from_transport=_from_transport)
        if _from_transport is not None:
            self._opener = _from_transport._opener
        else:
            self._opener = self._opener_class()

    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),
                                           qual_proto=self._scheme)

        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.tests.http_server import HttpServer_urllib
    return [(HttpTransport_urllib, HttpServer_urllib),
            ]