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
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
|
# Copyright (C) 2003-2009 Robey Pointer <robeypointer@gmail.com>
#
# This file is part of paramiko.
#
# Paramiko is free software; you can redistribute it and/or modify it under the
# terms of the GNU Lesser General Public License as published by the Free
# Software Foundation; either version 2.1 of the License, or (at your option)
# any later version.
#
# Paramiko 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 Lesser General Public License for more
# details.
#
# You should have received a copy of the GNU Lesser General Public License
# along with Paramiko; if not, write to the Free Software Foundation, Inc.,
# 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
"""
some unit tests to make sure sftp works well with large files.
a real actual sftp server is contacted, and a new folder is created there to
do test file operations in (so no existing files will be harmed).
"""
import os
import random
import struct
import sys
import time
import unittest
from paramiko.common import o660
from tests.test_sftp import get_sftp
FOLDER = os.environ.get('TEST_FOLDER', 'temp-testing000')
class BigSFTPTest (unittest.TestCase):
def setUp(self):
global FOLDER
sftp = get_sftp()
for i in range(1000):
FOLDER = FOLDER[:-3] + '%03d' % i
try:
sftp.mkdir(FOLDER)
break
except (IOError, OSError):
pass
def tearDown(self):
sftp = get_sftp()
sftp.rmdir(FOLDER)
def test_1_lots_of_files(self):
"""
create a bunch of files over the same session.
"""
sftp = get_sftp()
numfiles = 100
try:
for i in range(numfiles):
with sftp.open('%s/file%d.txt' % (FOLDER, i), 'w', 1) as f:
f.write('this is file #%d.\n' % i)
sftp.chmod('%s/file%d.txt' % (FOLDER, i), o660)
# now make sure every file is there, by creating a list of filenmes
# and reading them in random order.
numlist = list(range(numfiles))
while len(numlist) > 0:
r = numlist[random.randint(0, len(numlist) - 1)]
with sftp.open('%s/file%d.txt' % (FOLDER, r)) as f:
self.assertEqual(f.readline(), 'this is file #%d.\n' % r)
numlist.remove(r)
finally:
for i in range(numfiles):
try:
sftp.remove('%s/file%d.txt' % (FOLDER, i))
except:
pass
def test_2_big_file(self):
"""
write a 1MB file with no buffering.
"""
sftp = get_sftp()
kblob = (1024 * b'x')
start = time.time()
try:
with sftp.open('%s/hongry.txt' % FOLDER, 'w') as f:
for n in range(1024):
f.write(kblob)
if n % 128 == 0:
sys.stderr.write('.')
sys.stderr.write(' ')
self.assertEqual(sftp.stat('%s/hongry.txt' % FOLDER).st_size, 1024 * 1024)
end = time.time()
sys.stderr.write('%ds ' % round(end - start))
start = time.time()
with sftp.open('%s/hongry.txt' % FOLDER, 'r') as f:
for n in range(1024):
data = f.read(1024)
self.assertEqual(data, kblob)
end = time.time()
sys.stderr.write('%ds ' % round(end - start))
finally:
sftp.remove('%s/hongry.txt' % FOLDER)
def test_3_big_file_pipelined(self):
"""
write a 1MB file, with no linefeeds, using pipelining.
"""
sftp = get_sftp()
kblob = bytes().join([struct.pack('>H', n) for n in range(512)])
start = time.time()
try:
with sftp.open('%s/hongry.txt' % FOLDER, 'wb') as f:
f.set_pipelined(True)
for n in range(1024):
f.write(kblob)
if n % 128 == 0:
sys.stderr.write('.')
sys.stderr.write(' ')
self.assertEqual(sftp.stat('%s/hongry.txt' % FOLDER).st_size, 1024 * 1024)
end = time.time()
sys.stderr.write('%ds ' % round(end - start))
start = time.time()
with sftp.open('%s/hongry.txt' % FOLDER, 'rb') as f:
file_size = f.stat().st_size
f.prefetch(file_size)
# read on odd boundaries to make sure the bytes aren't getting scrambled
n = 0
k2blob = kblob + kblob
chunk = 629
size = 1024 * 1024
while n < size:
if n + chunk > size:
chunk = size - n
data = f.read(chunk)
offset = n % 1024
self.assertEqual(data, k2blob[offset:offset + chunk])
n += chunk
end = time.time()
sys.stderr.write('%ds ' % round(end - start))
finally:
sftp.remove('%s/hongry.txt' % FOLDER)
def test_4_prefetch_seek(self):
sftp = get_sftp()
kblob = bytes().join([struct.pack('>H', n) for n in range(512)])
try:
with sftp.open('%s/hongry.txt' % FOLDER, 'wb') as f:
f.set_pipelined(True)
for n in range(1024):
f.write(kblob)
if n % 128 == 0:
sys.stderr.write('.')
sys.stderr.write(' ')
self.assertEqual(sftp.stat('%s/hongry.txt' % FOLDER).st_size, 1024 * 1024)
start = time.time()
k2blob = kblob + kblob
chunk = 793
for i in range(10):
with sftp.open('%s/hongry.txt' % FOLDER, 'rb') as f:
file_size = f.stat().st_size
f.prefetch(file_size)
base_offset = (512 * 1024) + 17 * random.randint(1000, 2000)
offsets = [base_offset + j * chunk for j in range(100)]
# randomly seek around and read them out
for j in range(100):
offset = offsets[random.randint(0, len(offsets) - 1)]
offsets.remove(offset)
f.seek(offset)
data = f.read(chunk)
n_offset = offset % 1024
self.assertEqual(data, k2blob[n_offset:n_offset + chunk])
offset += chunk
end = time.time()
sys.stderr.write('%ds ' % round(end - start))
finally:
sftp.remove('%s/hongry.txt' % FOLDER)
def test_5_readv_seek(self):
sftp = get_sftp()
kblob = bytes().join([struct.pack('>H', n) for n in range(512)])
try:
with sftp.open('%s/hongry.txt' % FOLDER, 'wb') as f:
f.set_pipelined(True)
for n in range(1024):
f.write(kblob)
if n % 128 == 0:
sys.stderr.write('.')
sys.stderr.write(' ')
self.assertEqual(sftp.stat('%s/hongry.txt' % FOLDER).st_size, 1024 * 1024)
start = time.time()
k2blob = kblob + kblob
chunk = 793
for i in range(10):
with sftp.open('%s/hongry.txt' % FOLDER, 'rb') as f:
base_offset = (512 * 1024) + 17 * random.randint(1000, 2000)
# make a bunch of offsets and put them in random order
offsets = [base_offset + j * chunk for j in range(100)]
readv_list = []
for j in range(100):
o = offsets[random.randint(0, len(offsets) - 1)]
offsets.remove(o)
readv_list.append((o, chunk))
ret = f.readv(readv_list)
for i in range(len(readv_list)):
offset = readv_list[i][0]
n_offset = offset % 1024
self.assertEqual(next(ret), k2blob[n_offset:n_offset + chunk])
end = time.time()
sys.stderr.write('%ds ' % round(end - start))
finally:
sftp.remove('%s/hongry.txt' % FOLDER)
def test_6_lots_of_prefetching(self):
"""
prefetch a 1MB file a bunch of times, discarding the file object
without using it, to verify that paramiko doesn't get confused.
"""
sftp = get_sftp()
kblob = (1024 * b'x')
try:
with sftp.open('%s/hongry.txt' % FOLDER, 'w') as f:
f.set_pipelined(True)
for n in range(1024):
f.write(kblob)
if n % 128 == 0:
sys.stderr.write('.')
sys.stderr.write(' ')
self.assertEqual(sftp.stat('%s/hongry.txt' % FOLDER).st_size, 1024 * 1024)
for i in range(10):
with sftp.open('%s/hongry.txt' % FOLDER, 'r') as f:
file_size = f.stat().st_size
f.prefetch(file_size)
with sftp.open('%s/hongry.txt' % FOLDER, 'r') as f:
file_size = f.stat().st_size
f.prefetch(file_size)
for n in range(1024):
data = f.read(1024)
self.assertEqual(data, kblob)
if n % 128 == 0:
sys.stderr.write('.')
sys.stderr.write(' ')
finally:
sftp.remove('%s/hongry.txt' % FOLDER)
def test_7_prefetch_readv(self):
"""
verify that prefetch and readv don't conflict with each other.
"""
sftp = get_sftp()
kblob = bytes().join([struct.pack('>H', n) for n in range(512)])
try:
with sftp.open('%s/hongry.txt' % FOLDER, 'wb') as f:
f.set_pipelined(True)
for n in range(1024):
f.write(kblob)
if n % 128 == 0:
sys.stderr.write('.')
sys.stderr.write(' ')
self.assertEqual(sftp.stat('%s/hongry.txt' % FOLDER).st_size, 1024 * 1024)
with sftp.open('%s/hongry.txt' % FOLDER, 'rb') as f:
file_size = f.stat().st_size
f.prefetch(file_size)
data = f.read(1024)
self.assertEqual(data, kblob)
chunk_size = 793
base_offset = 512 * 1024
k2blob = kblob + kblob
chunks = [(base_offset + (chunk_size * i), chunk_size) for i in range(20)]
for data in f.readv(chunks):
offset = base_offset % 1024
self.assertEqual(chunk_size, len(data))
self.assertEqual(k2blob[offset:offset + chunk_size], data)
base_offset += chunk_size
sys.stderr.write(' ')
finally:
sftp.remove('%s/hongry.txt' % FOLDER)
def test_8_large_readv(self):
"""
verify that a very large readv is broken up correctly and still
returned as a single blob.
"""
sftp = get_sftp()
kblob = bytes().join([struct.pack('>H', n) for n in range(512)])
try:
with sftp.open('%s/hongry.txt' % FOLDER, 'wb') as f:
f.set_pipelined(True)
for n in range(1024):
f.write(kblob)
if n % 128 == 0:
sys.stderr.write('.')
sys.stderr.write(' ')
self.assertEqual(sftp.stat('%s/hongry.txt' % FOLDER).st_size, 1024 * 1024)
with sftp.open('%s/hongry.txt' % FOLDER, 'rb') as f:
data = list(f.readv([(23 * 1024, 128 * 1024)]))
self.assertEqual(1, len(data))
data = data[0]
self.assertEqual(128 * 1024, len(data))
sys.stderr.write(' ')
finally:
sftp.remove('%s/hongry.txt' % FOLDER)
def test_9_big_file_big_buffer(self):
"""
write a 1MB file, with no linefeeds, and a big buffer.
"""
sftp = get_sftp()
mblob = (1024 * 1024 * 'x')
try:
with sftp.open('%s/hongry.txt' % FOLDER, 'w', 128 * 1024) as f:
f.write(mblob)
self.assertEqual(sftp.stat('%s/hongry.txt' % FOLDER).st_size, 1024 * 1024)
finally:
sftp.remove('%s/hongry.txt' % FOLDER)
def test_A_big_file_renegotiate(self):
"""
write a 1MB file, forcing key renegotiation in the middle.
"""
sftp = get_sftp()
t = sftp.sock.get_transport()
t.packetizer.REKEY_BYTES = 512 * 1024
k32blob = (32 * 1024 * 'x')
try:
with sftp.open('%s/hongry.txt' % FOLDER, 'w', 128 * 1024) as f:
for i in range(32):
f.write(k32blob)
self.assertEqual(sftp.stat('%s/hongry.txt' % FOLDER).st_size, 1024 * 1024)
self.assertNotEqual(t.H, t.session_id)
# try to read it too.
with sftp.open('%s/hongry.txt' % FOLDER, 'r', 128 * 1024) as f:
file_size = f.stat().st_size
f.prefetch(file_size)
total = 0
while total < 1024 * 1024:
total += len(f.read(32 * 1024))
finally:
sftp.remove('%s/hongry.txt' % FOLDER)
t.packetizer.REKEY_BYTES = pow(2, 30)
if __name__ == '__main__':
from tests.test_sftp import SFTPTest
SFTPTest.init_loopback()
from unittest import main
main()
|
