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
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
|
# Copyright (C) 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
"""Tests for WSGI application"""
from cStringIO import StringIO
from bzrlib import tests
from bzrlib.smart import medium, message, protocol
from bzrlib.transport.http import wsgi
from bzrlib.transport import chroot, memory
class WSGITestMixin(object):
def build_environ(self, updates=None):
"""Builds an environ dict with all fields required by PEP 333.
:param updates: a dict to that will be incorporated into the returned
dict using dict.update(updates).
"""
environ = {
# Required CGI variables
'REQUEST_METHOD': 'GET',
'SCRIPT_NAME': '/script/name/',
'PATH_INFO': 'path/info',
'SERVER_NAME': 'test',
'SERVER_PORT': '9999',
'SERVER_PROTOCOL': 'HTTP/1.0',
# Required WSGI variables
'wsgi.version': (1,0),
'wsgi.url_scheme': 'http',
'wsgi.input': StringIO(''),
'wsgi.errors': StringIO(),
'wsgi.multithread': False,
'wsgi.multiprocess': False,
'wsgi.run_once': True,
}
if updates is not None:
environ.update(updates)
return environ
def read_response(self, iterable):
response = ''
for string in iterable:
response += string
return response
def start_response(self, status, headers):
self.status = status
self.headers = headers
class TestWSGI(tests.TestCase, WSGITestMixin):
def setUp(self):
tests.TestCase.setUp(self)
self.status = None
self.headers = None
def test_construct(self):
app = wsgi.SmartWSGIApp(FakeTransport())
self.assertIsInstance(
app.backing_transport, chroot.ChrootTransport)
def test_http_get_rejected(self):
# GET requests are rejected.
app = wsgi.SmartWSGIApp(FakeTransport())
environ = self.build_environ({'REQUEST_METHOD': 'GET'})
iterable = app(environ, self.start_response)
self.read_response(iterable)
self.assertEqual('405 Method not allowed', self.status)
self.assertTrue(('Allow', 'POST') in self.headers)
def _fake_make_request(self, transport, write_func, bytes, rcp):
request = FakeRequest(transport, write_func)
request.accept_bytes(bytes)
self.request = request
return request
def test_smart_wsgi_app_uses_given_relpath(self):
# The SmartWSGIApp should use the "bzrlib.relpath" field from the
# WSGI environ to clone from its backing transport to get a specific
# transport for this request.
transport = FakeTransport()
wsgi_app = wsgi.SmartWSGIApp(transport)
wsgi_app.backing_transport = transport
wsgi_app.make_request = self._fake_make_request
fake_input = StringIO('fake request')
environ = self.build_environ({
'REQUEST_METHOD': 'POST',
'CONTENT_LENGTH': len(fake_input.getvalue()),
'wsgi.input': fake_input,
'bzrlib.relpath': 'foo/bar',
})
iterable = wsgi_app(environ, self.start_response)
response = self.read_response(iterable)
self.assertEqual([('clone', 'foo/bar/')] , transport.calls)
def test_smart_wsgi_app_request_and_response(self):
# SmartWSGIApp reads the smart request from the 'wsgi.input' file-like
# object in the environ dict, and returns the response via the iterable
# returned to the WSGI handler.
transport = memory.MemoryTransport()
transport.put_bytes('foo', 'some bytes')
wsgi_app = wsgi.SmartWSGIApp(transport)
wsgi_app.make_request = self._fake_make_request
fake_input = StringIO('fake request')
environ = self.build_environ({
'REQUEST_METHOD': 'POST',
'CONTENT_LENGTH': len(fake_input.getvalue()),
'wsgi.input': fake_input,
'bzrlib.relpath': 'foo',
})
iterable = wsgi_app(environ, self.start_response)
response = self.read_response(iterable)
self.assertEqual('200 OK', self.status)
self.assertEqual('got bytes: fake request', response)
def test_relpath_setter(self):
# wsgi.RelpathSetter is WSGI "middleware" to set the 'bzrlib.relpath'
# variable.
calls = []
def fake_app(environ, start_response):
calls.append(environ['bzrlib.relpath'])
wrapped_app = wsgi.RelpathSetter(
fake_app, prefix='/abc/', path_var='FOO')
wrapped_app({'FOO': '/abc/xyz/.bzr/smart'}, None)
self.assertEqual(['xyz'], calls)
def test_relpath_setter_bad_path_prefix(self):
# wsgi.RelpathSetter will reject paths with that don't match the prefix
# with a 404. This is probably a sign of misconfiguration; a server
# shouldn't ever be invoking our WSGI application with bad paths.
def fake_app(environ, start_response):
self.fail('The app should never be called when the path is wrong')
wrapped_app = wsgi.RelpathSetter(
fake_app, prefix='/abc/', path_var='FOO')
iterable = wrapped_app(
{'FOO': 'AAA/abc/xyz/.bzr/smart'}, self.start_response)
self.read_response(iterable)
self.assertTrue(self.status.startswith('404'))
def test_relpath_setter_bad_path_suffix(self):
# Similar to test_relpath_setter_bad_path_prefix: wsgi.RelpathSetter
# will reject paths with that don't match the suffix '.bzr/smart' with a
# 404 as well. Again, this shouldn't be seen by our WSGI application if
# the server is configured correctly.
def fake_app(environ, start_response):
self.fail('The app should never be called when the path is wrong')
wrapped_app = wsgi.RelpathSetter(
fake_app, prefix='/abc/', path_var='FOO')
iterable = wrapped_app(
{'FOO': '/abc/xyz/.bzr/AAA'}, self.start_response)
self.read_response(iterable)
self.assertTrue(self.status.startswith('404'))
def test_make_app(self):
# The make_app helper constructs a SmartWSGIApp wrapped in a
# RelpathSetter.
app = wsgi.make_app(
root='a root',
prefix='a prefix',
path_var='a path_var')
self.assertIsInstance(app, wsgi.RelpathSetter)
self.assertIsInstance(app.app, wsgi.SmartWSGIApp)
self.assertStartsWith(app.app.backing_transport.base, 'chroot-')
backing_transport = app.app.backing_transport
chroot_backing_transport = backing_transport.server.backing_transport
self.assertEndsWith(chroot_backing_transport.base, 'a%20root/')
self.assertEqual(app.app.root_client_path, 'a prefix')
self.assertEqual(app.path_var, 'a path_var')
def test_incomplete_request(self):
transport = FakeTransport()
wsgi_app = wsgi.SmartWSGIApp(transport)
def make_request(transport, write_func, bytes, root_client_path):
request = IncompleteRequest(transport, write_func)
request.accept_bytes(bytes)
self.request = request
return request
wsgi_app.make_request = make_request
fake_input = StringIO('incomplete request')
environ = self.build_environ({
'REQUEST_METHOD': 'POST',
'CONTENT_LENGTH': len(fake_input.getvalue()),
'wsgi.input': fake_input,
'bzrlib.relpath': 'foo/bar',
})
iterable = wsgi_app(environ, self.start_response)
response = self.read_response(iterable)
self.assertEqual('200 OK', self.status)
self.assertEqual('error\x01incomplete request\n', response)
def test_protocol_version_detection_one(self):
# SmartWSGIApp detects requests that don't start with
# REQUEST_VERSION_TWO as version one.
transport = memory.MemoryTransport()
wsgi_app = wsgi.SmartWSGIApp(transport)
fake_input = StringIO('hello\n')
environ = self.build_environ({
'REQUEST_METHOD': 'POST',
'CONTENT_LENGTH': len(fake_input.getvalue()),
'wsgi.input': fake_input,
'bzrlib.relpath': 'foo',
})
iterable = wsgi_app(environ, self.start_response)
response = self.read_response(iterable)
self.assertEqual('200 OK', self.status)
# Expect a version 1-encoded response.
self.assertEqual('ok\x012\n', response)
def test_protocol_version_detection_two(self):
# SmartWSGIApp detects requests that start with REQUEST_VERSION_TWO
# as version two.
transport = memory.MemoryTransport()
wsgi_app = wsgi.SmartWSGIApp(transport)
fake_input = StringIO(protocol.REQUEST_VERSION_TWO + 'hello\n')
environ = self.build_environ({
'REQUEST_METHOD': 'POST',
'CONTENT_LENGTH': len(fake_input.getvalue()),
'wsgi.input': fake_input,
'bzrlib.relpath': 'foo',
})
iterable = wsgi_app(environ, self.start_response)
response = self.read_response(iterable)
self.assertEqual('200 OK', self.status)
# Expect a version 2-encoded response.
self.assertEqual(
protocol.RESPONSE_VERSION_TWO + 'success\nok\x012\n', response)
class TestWSGIJail(tests.TestCaseWithMemoryTransport, WSGITestMixin):
def make_hpss_wsgi_request(self, wsgi_relpath, *args):
write_buf = StringIO()
request_medium = medium.SmartSimplePipesClientMedium(
None, write_buf, 'fake:' + wsgi_relpath)
request_encoder = protocol.ProtocolThreeRequester(
request_medium.get_request())
request_encoder.call(*args)
write_buf.seek(0)
environ = self.build_environ({
'REQUEST_METHOD': 'POST',
'CONTENT_LENGTH': len(write_buf.getvalue()),
'wsgi.input': write_buf,
'bzrlib.relpath': wsgi_relpath,
})
return environ
def test_jail_root(self):
"""The WSGI HPSS glue allows access to the whole WSGI backing
transport, regardless of which HTTP path the request was delivered
to.
"""
# make a branch in a shared repo
self.make_repository('repo', shared=True)
branch = self.make_bzrdir('repo/branch').create_branch()
# serve the repo via bzr+http WSGI
wsgi_app = wsgi.SmartWSGIApp(self.get_transport())
# send a request to /repo/branch that will have to access /repo.
environ = self.make_hpss_wsgi_request(
'/repo/branch', 'BzrDir.open_branchV2', '.')
iterable = wsgi_app(environ, self.start_response)
response_bytes = self.read_response(iterable)
self.assertEqual('200 OK', self.status)
# expect a successful response, rather than a jail break error
from bzrlib.tests.test_smart_transport import LoggingMessageHandler
message_handler = LoggingMessageHandler()
decoder = protocol.ProtocolThreeDecoder(
message_handler, expect_version_marker=True)
decoder.accept_bytes(response_bytes)
self.assertTrue(
('structure', ('branch', branch._format.network_name()))
in message_handler.event_log)
class FakeRequest(object):
def __init__(self, transport, write_func):
self.transport = transport
self.write_func = write_func
self.accepted_bytes = ''
def accept_bytes(self, bytes):
self.accepted_bytes = bytes
self.write_func('got bytes: ' + bytes)
def next_read_size(self):
return 0
class FakeTransport(object):
def __init__(self):
self.calls = []
self.base = 'fake:///'
def abspath(self, relpath):
return 'fake:///' + relpath
def clone(self, relpath):
self.calls.append(('clone', relpath))
return self
class IncompleteRequest(FakeRequest):
"""A request-like object that always expects to read more bytes."""
def next_read_size(self):
# this request always asks for more
return 1
|