summaryrefslogtreecommitdiffstats
path: root/test/functional/swift_test_client.py
blob: d407a3317c1a5227924392cfe3e35c3c1f20d65d (plain)
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
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
# Copyright (c) 2010-2012 OpenStack Foundation
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#    http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
# implied.
# See the License for the specific language governing permissions and
# limitations under the License.

import hashlib
import httplib
import os
import random
import socket
import StringIO
import time
import urllib

import simplejson as json

from nose import SkipTest
from xml.dom import minidom
from swiftclient import get_auth

from test import safe_repr


class AuthenticationFailed(Exception):
    pass


class RequestError(Exception):
    pass


class ResponseError(Exception):
    def __init__(self, response, method, path):
        self.status = response.status
        self.reason = response.reason
        self.method = method
        self.path = path
        self.headers = response.getheaders()

        for name, value in self.headers:
            if name.lower() == 'x-trans-id':
                self.txid = value
                break
        else:
            self.txid = None

        super(ResponseError, self).__init__()

    def __str__(self):
        return repr(self)

    def __repr__(self):
        return '%d: %r (%r %r) txid=%s' % (
            self.status, self.reason, self.method, self.path, self.txid)


def listing_empty(method):
    for i in xrange(0, 6):
        if len(method()) == 0:
            return True

        time.sleep(2 ** i)

    return False


def listing_items(method):
    marker = None
    once = True
    items = []

    while once or items:
        for i in items:
            yield i

        if once or marker:
            if marker:
                items = method(parms={'marker': marker})
            else:
                items = method()

            if len(items) == 10000:
                marker = items[-1]
            else:
                marker = None

            once = False
        else:
            items = []


class Connection(object):
    def __init__(self, config):
        for key in 'auth_host auth_port auth_ssl username password'.split():
            if key not in config:
                raise SkipTest

        self.auth_host = config['auth_host']
        self.auth_port = int(config['auth_port'])
        self.auth_ssl = config['auth_ssl'] in ('on', 'true', 'yes', '1')
        self.auth_prefix = config.get('auth_prefix', '/')
        self.auth_version = str(config.get('auth_version', '1'))

        self.account = config.get('account')
        self.username = config['username']
        self.password = config['password']

        self.storage_host = None
        self.storage_port = None

        self.conn_class = None

    def get_account(self):
        return Account(self, self.account)

    def authenticate(self, clone_conn=None):
        if clone_conn:
            self.conn_class = clone_conn.conn_class
            self.storage_host = clone_conn.storage_host
            self.storage_url = clone_conn.storage_url
            self.storage_port = clone_conn.storage_port
            self.storage_token = clone_conn.storage_token
            return

        if self.auth_version == "1":
            auth_path = '%sv1.0' % (self.auth_prefix)
            if self.account:
                auth_user = '%s:%s' % (self.account, self.username)
            else:
                auth_user = self.username
        else:
            auth_user = self.username
            auth_path = self.auth_prefix
        auth_scheme = 'https://' if self.auth_ssl else 'http://'
        auth_netloc = "%s:%d" % (self.auth_host, self.auth_port)
        auth_url = auth_scheme + auth_netloc + auth_path

        (storage_url, storage_token) = get_auth(
            auth_url, auth_user, self.password, snet=False,
            tenant_name=self.account, auth_version=self.auth_version,
            os_options={})

        if not (storage_url and storage_token):
            raise AuthenticationFailed()

        x = storage_url.split('/')

        if x[0] == 'http:':
            self.conn_class = httplib.HTTPConnection
            self.storage_port = 80
        elif x[0] == 'https:':
            self.conn_class = httplib.HTTPSConnection
            self.storage_port = 443
        else:
            raise ValueError('unexpected protocol %s' % (x[0]))

        self.storage_host = x[2].split(':')[0]
        if ':' in x[2]:
            self.storage_port = int(x[2].split(':')[1])
        # Make sure storage_url and the storage_token are
        # strings and not unicode, since
        # keystoneclient (called by swiftclient) returns them in
        # unicode and this would cause troubles when doing
        # no_safe_quote query.
        self.storage_url = str('/%s/%s' % (x[3], x[4]))
        self.storage_token = str(storage_token)

        self.http_connect()
        return self.storage_url, self.storage_token

    def http_connect(self):
        self.connection = self.conn_class(self.storage_host,
                                          port=self.storage_port)
        #self.connection.set_debuglevel(3)

    def make_path(self, path=[], cfg={}):
        if cfg.get('version_only_path'):
            return '/' + self.storage_url.split('/')[1]

        if path:
            quote = urllib.quote
            if cfg.get('no_quote') or cfg.get('no_path_quote'):
                quote = lambda x: x
            return '%s/%s' % (self.storage_url,
                              '/'.join([quote(i) for i in path]))
        else:
            return self.storage_url

    def make_headers(self, hdrs, cfg={}):
        headers = {}

        if not cfg.get('no_auth_token'):
            headers['X-Auth-Token'] = self.storage_token

        if isinstance(hdrs, dict):
            headers.update(hdrs)
        return headers

    def make_request(self, method, path=[], data='', hdrs={}, parms={},
                     cfg={}):
        path = self.make_path(path, cfg=cfg)
        headers = self.make_headers(hdrs, cfg=cfg)
        if isinstance(parms, dict) and parms:
            quote = urllib.quote
            if cfg.get('no_quote') or cfg.get('no_parms_quote'):
                quote = lambda x: x
            query_args = ['%s=%s' % (quote(x), quote(str(y)))
                          for (x, y) in parms.items()]
            path = '%s?%s' % (path, '&'.join(query_args))
        if not cfg.get('no_content_length'):
            if cfg.get('set_content_length'):
                headers['Content-Length'] = cfg.get('set_content_length')
            else:
                headers['Content-Length'] = len(data)

        def try_request():
            self.http_connect()
            self.connection.request(method, path, data, headers)
            return self.connection.getresponse()

        self.response = None
        try_count = 0
        fail_messages = []
        while try_count < 5:
            try_count += 1

            try:
                self.response = try_request()
            except httplib.HTTPException as e:
                fail_messages.append(safe_repr(e))
                continue

            if self.response.status == 401:
                fail_messages.append("Response 401")
                self.authenticate()
                continue
            elif self.response.status == 503:
                fail_messages.append("Response 503")
                if try_count != 5:
                    time.sleep(5)
                continue

            break

        if self.response:
            return self.response.status

        request = "{method} {path} headers: {headers} data: {data}".format(
            method=method, path=path, headers=headers, data=data)
        raise RequestError('Unable to complete http request: %s. '
                           'Attempts: %s, Failures: %s' %
                           (request, len(fail_messages), fail_messages))

    def put_start(self, path, hdrs={}, parms={}, cfg={}, chunked=False):
        self.http_connect()

        path = self.make_path(path, cfg)
        headers = self.make_headers(hdrs, cfg=cfg)

        if chunked:
            headers['Transfer-Encoding'] = 'chunked'
            headers.pop('Content-Length', None)

        if isinstance(parms, dict) and parms:
            quote = urllib.quote
            if cfg.get('no_quote') or cfg.get('no_parms_quote'):
                quote = lambda x: x
            query_args = ['%s=%s' % (quote(x), quote(str(y)))
                          for (x, y) in parms.items()]
            path = '%s?%s' % (path, '&'.join(query_args))

        self.connection = self.conn_class(self.storage_host,
                                          port=self.storage_port)
        #self.connection.set_debuglevel(3)
        self.connection.putrequest('PUT', path)
        for key, value in headers.iteritems():
            self.connection.putheader(key, value)
        self.connection.endheaders()

    def put_data(self, data, chunked=False):
        if chunked:
            self.connection.send('%x\r\n%s\r\n' % (len(data), data))
        else:
            self.connection.send(data)

    def put_end(self, chunked=False):
        if chunked:
            self.connection.send('0\r\n\r\n')

        self.response = self.connection.getresponse()
        self.connection.close()
        return self.response.status


class Base:
    def __str__(self):
        return self.name

    def header_fields(self, fields):
        headers = dict(self.conn.response.getheaders())
        ret = {}
        for field in fields:
            if field[1] not in headers:
                raise ValueError("%s was not found in response header" %
                                 (field[1]))

            try:
                ret[field[0]] = int(headers[field[1]])
            except ValueError:
                ret[field[0]] = headers[field[1]]
        return ret


class Account(Base):
    def __init__(self, conn, name):
        self.conn = conn
        self.name = str(name)

    def container(self, container_name):
        return Container(self.conn, self.name, container_name)

    def containers(self, hdrs={}, parms={}, cfg={}):
        format_type = parms.get('format', None)
        if format_type not in [None, 'json', 'xml']:
            raise RequestError('Invalid format: %s' % format_type)
        if format_type is None and 'format' in parms:
            del parms['format']

        status = self.conn.make_request('GET', self.path, hdrs=hdrs,
                                        parms=parms, cfg=cfg)
        if status == 200:
            if format_type == 'json':
                conts = json.loads(self.conn.response.read())
                for cont in conts:
                    cont['name'] = cont['name'].encode('utf-8')
                return conts
            elif format_type == 'xml':
                conts = []
                tree = minidom.parseString(self.conn.response.read())
                for x in tree.getElementsByTagName('container'):
                    cont = {}
                    for key in ['name', 'count', 'bytes']:
                        cont[key] = x.getElementsByTagName(key)[0].\
                            childNodes[0].nodeValue
                    conts.append(cont)
                for cont in conts:
                    cont['name'] = cont['name'].encode('utf-8')
                return conts
            else:
                lines = self.conn.response.read().split('\n')
                if lines and not lines[-1]:
                    lines = lines[:-1]
                return lines
        elif status == 204:
            return []

        raise ResponseError(self.conn.response, 'GET',
                            self.conn.make_path(self.path))

    def delete_containers(self):
        for c in listing_items(self.containers):
            cont = self.container(c)
            if not cont.delete_recursive():
                return False

        return listing_empty(self.containers)

    def info(self, hdrs={}, parms={}, cfg={}):
        if self.conn.make_request('HEAD', self.path, hdrs=hdrs,
                                  parms=parms, cfg=cfg) != 204:

            raise ResponseError(self.conn.response, 'HEAD',
                                self.conn.make_path(self.path))

        fields = [['object_count', 'x-account-object-count'],
                  ['container_count', 'x-account-container-count'],
                  ['bytes_used', 'x-account-bytes-used']]

        return self.header_fields(fields)

    @property
    def path(self):
        return []


class Container(Base):
    def __init__(self, conn, account, name):
        self.conn = conn
        self.account = str(account)
        self.name = str(name)

    def create(self, hdrs={}, parms={}, cfg={}):
        return self.conn.make_request('PUT', self.path, hdrs=hdrs,
                                      parms=parms, cfg=cfg) in (201, 202)

    def delete(self, hdrs={}, parms={}):
        return self.conn.make_request('DELETE', self.path, hdrs=hdrs,
                                      parms=parms) == 204

    def delete_files(self):
        for f in listing_items(self.files):
            file_item = self.file(f)
            if not file_item.delete():
                return False

        return listing_empty(self.files)

    def delete_recursive(self):
        return self.delete_files() and self.delete()

    def file(self, file_name):
        return File(self.conn, self.account, self.name, file_name)

    def files(self, hdrs={}, parms={}, cfg={}):
        format_type = parms.get('format', None)
        if format_type not in [None, 'json', 'xml']:
            raise RequestError('Invalid format: %s' % format_type)
        if format_type is None and 'format' in parms:
            del parms['format']

        status = self.conn.make_request('GET', self.path, hdrs=hdrs,
                                        parms=parms, cfg=cfg)
        if status == 200:
            if format_type == 'json':
                files = json.loads(self.conn.response.read())

                for file_item in files:
                    file_item['name'] = file_item['name'].encode('utf-8')
                    file_item['content_type'] = file_item['content_type'].\
                        encode('utf-8')
                return files
            elif format_type == 'xml':
                files = []
                tree = minidom.parseString(self.conn.response.read())
                for x in tree.getElementsByTagName('object'):
                    file_item = {}
                    for key in ['name', 'hash', 'bytes', 'content_type',
                                'last_modified']:

                        file_item[key] = x.getElementsByTagName(key)[0].\
                            childNodes[0].nodeValue
                    files.append(file_item)

                for file_item in files:
                    file_item['name'] = file_item['name'].encode('utf-8')
                    file_item['content_type'] = file_item['content_type'].\
                        encode('utf-8')
                return files
            else:
                content = self.conn.response.read()
                if content:
                    lines = content.split('\n')
                    if lines and not lines[-1]:
                        lines = lines[:-1]
                    return lines
                else:
                    return []
        elif status == 204:
            return []

        raise ResponseError(self.conn.response, 'GET',
                            self.conn.make_path(self.path))

    def info(self, hdrs={}, parms={}, cfg={}):
        self.conn.make_request('HEAD', self.path, hdrs=hdrs,
                               parms=parms, cfg=cfg)

        if self.conn.response.status == 204:
            fields = [['bytes_used', 'x-container-bytes-used'],
                      ['object_count', 'x-container-object-count']]

            return self.header_fields(fields)

        raise ResponseError(self.conn.response, 'HEAD',
                            self.conn.make_path(self.path))

    @property
    def path(self):
        return [self.name]


class File(Base):
    def __init__(self, conn, account, container, name):
        self.conn = conn
        self.account = str(account)
        self.container = str(container)
        self.name = str(name)

        self.chunked_write_in_progress = False
        self.content_type = None
        self.size = None
        self.metadata = {}

    def make_headers(self, cfg={}):
        headers = {}
        if not cfg.get('no_content_length'):
            if cfg.get('set_content_length'):
                headers['Content-Length'] = cfg.get('set_content_length')
            elif self.size:
                headers['Content-Length'] = self.size
            else:
                headers['Content-Length'] = 0

        if cfg.get('no_content_type'):
            pass
        elif self.content_type:
            headers['Content-Type'] = self.content_type
        else:
            headers['Content-Type'] = 'application/octet-stream'

        for key in self.metadata:
            headers['X-Object-Meta-' + key] = self.metadata[key]

        return headers

    @classmethod
    def compute_md5sum(cls, data):
        block_size = 4096

        if isinstance(data, str):
            data = StringIO.StringIO(data)

        checksum = hashlib.md5()
        buff = data.read(block_size)
        while buff:
            checksum.update(buff)
            buff = data.read(block_size)
        data.seek(0)
        return checksum.hexdigest()

    def copy(self, dest_cont, dest_file, hdrs={}, parms={}, cfg={}):
        if 'destination' in cfg:
            headers = {'Destination': cfg['destination']}
        elif cfg.get('no_destination'):
            headers = {}
        else:
            headers = {'Destination': '%s/%s' % (dest_cont, dest_file)}
        headers.update(hdrs)

        if 'Destination' in headers:
            headers['Destination'] = urllib.quote(headers['Destination'])

        return self.conn.make_request('COPY', self.path, hdrs=headers,
                                      parms=parms) == 201

    def delete(self, hdrs={}, parms={}):
        if self.conn.make_request('DELETE', self.path, hdrs=hdrs,
                                  parms=parms) != 204:

            raise ResponseError(self.conn.response, 'DELETE',
                                self.conn.make_path(self.path))

        return True

    def info(self, hdrs={}, parms={}, cfg={}):
        if self.conn.make_request('HEAD', self.path, hdrs=hdrs,
                                  parms=parms, cfg=cfg) != 200:

            raise ResponseError(self.conn.response, 'HEAD',
                                self.conn.make_path(self.path))

        fields = [['content_length', 'content-length'],
                  ['content_type', 'content-type'],
                  ['last_modified', 'last-modified'],
                  ['etag', 'etag']]

        header_fields = self.header_fields(fields)
        header_fields['etag'] = header_fields['etag'].strip('"')
        return header_fields

    def initialize(self, hdrs={}, parms={}):
        if not self.name:
            return False

        status = self.conn.make_request('HEAD', self.path, hdrs=hdrs,
                                        parms=parms)
        if status == 404:
            return False
        elif (status < 200) or (status > 299):
            raise ResponseError(self.conn.response, 'HEAD',
                                self.conn.make_path(self.path))

        for hdr in self.conn.response.getheaders():
            if hdr[0].lower() == 'content-type':
                self.content_type = hdr[1]
            if hdr[0].lower().startswith('x-object-meta-'):
                self.metadata[hdr[0][14:]] = hdr[1]
            if hdr[0].lower() == 'etag':
                self.etag = hdr[1].strip('"')
            if hdr[0].lower() == 'content-length':
                self.size = int(hdr[1])
            if hdr[0].lower() == 'last-modified':
                self.last_modified = hdr[1]

        return True

    def load_from_filename(self, filename, callback=None):
        fobj = open(filename, 'rb')
        self.write(fobj, callback=callback)
        fobj.close()

    @property
    def path(self):
        return [self.container, self.name]

    @classmethod
    def random_data(cls, size=None):
        if size is None:
            size = random.randint(1, 32768)
        fd = open('/dev/urandom', 'r')
        data = fd.read(size)
        fd.close()
        return data

    def read(self, size=-1, offset=0, hdrs=None, buffer=None,
             callback=None, cfg={}, parms={}):

        if size > 0:
            range_string = 'bytes=%d-%d' % (offset, (offset + size) - 1)
            if hdrs:
                hdrs['Range'] = range_string
            else:
                hdrs = {'Range': range_string}

        status = self.conn.make_request('GET', self.path, hdrs=hdrs,
                                        cfg=cfg, parms=parms)

        if (status < 200) or (status > 299):
            raise ResponseError(self.conn.response, 'GET',
                                self.conn.make_path(self.path))

        for hdr in self.conn.response.getheaders():
            if hdr[0].lower() == 'content-type':
                self.content_type = hdr[1]

        if hasattr(buffer, 'write'):
            scratch = self.conn.response.read(8192)
            transferred = 0

            while len(scratch) > 0:
                buffer.write(scratch)
                transferred += len(scratch)
                if callable(callback):
                    callback(transferred, self.size)
                scratch = self.conn.response.read(8192)
            return None
        else:
            return self.conn.response.read()

    def read_md5(self):
        status = self.conn.make_request('GET', self.path)

        if (status < 200) or (status > 299):
            raise ResponseError(self.conn.response, 'GET',
                                self.conn.make_path(self.path))

        checksum = hashlib.md5()

        scratch = self.conn.response.read(8192)
        while len(scratch) > 0:
            checksum.update(scratch)
            scratch = self.conn.response.read(8192)

        return checksum.hexdigest()

    def save_to_filename(self, filename, callback=None):
        try:
            fobj = open(filename, 'wb')
            self.read(buffer=fobj, callback=callback)
        finally:
            fobj.close()

    def sync_metadata(self, metadata={}, cfg={}):
        self.metadata.update(metadata)

        if self.metadata:
            headers = self.make_headers(cfg=cfg)
            if not cfg.get('no_content_length'):
                if cfg.get('set_content_length'):
                    headers['Content-Length'] = \
                        cfg.get('set_content_length')
                else:
                    headers['Content-Length'] = 0

            self.conn.make_request('POST', self.path, hdrs=headers, cfg=cfg)

            if self.conn.response.status not in (201, 202):
                raise ResponseError(self.conn.response, 'POST',
                                    self.conn.make_path(self.path))

        return True

    def chunked_write(self, data=None, hdrs={}, parms={}, cfg={}):
        if data is not None and self.chunked_write_in_progress:
            self.conn.put_data(data, True)
        elif data is not None:
            self.chunked_write_in_progress = True

            headers = self.make_headers(cfg=cfg)
            headers.update(hdrs)

            self.conn.put_start(self.path, hdrs=headers, parms=parms,
                                cfg=cfg, chunked=True)

            self.conn.put_data(data, True)
        elif self.chunked_write_in_progress:
            self.chunked_write_in_progress = False
            return self.conn.put_end(True) == 201
        else:
            raise RuntimeError

    def write(self, data='', hdrs={}, parms={}, callback=None, cfg={}):
        block_size = 2 ** 20

        if isinstance(data, file):
            try:
                data.flush()
                data.seek(0)
            except IOError:
                pass
            self.size = int(os.fstat(data.fileno())[6])
        else:
            data = StringIO.StringIO(data)
            self.size = data.len

        headers = self.make_headers(cfg=cfg)
        headers.update(hdrs)

        self.conn.put_start(self.path, hdrs=headers, parms=parms, cfg=cfg)

        transferred = 0
        buff = data.read(block_size)
        try:
            while len(buff) > 0:
                self.conn.put_data(buff)
                buff = data.read(block_size)
                transferred += len(buff)
                if callable(callback):
                    callback(transferred, self.size)

            self.conn.put_end()
        except socket.timeout as err:
            raise err

        if (self.conn.response.status < 200) or \
           (self.conn.response.status > 299):
            raise ResponseError(self.conn.response, 'PUT',
                                self.conn.make_path(self.path))

        try:
            data.seek(0)
        except IOError:
            pass
        self.md5 = self.compute_md5sum(data)

        return True

    def write_random(self, size=None, hdrs={}, parms={}, cfg={}):
        data = self.random_data(size)
        if not self.write(data, hdrs=hdrs, parms=parms, cfg=cfg):
            raise ResponseError(self.conn.response, 'PUT',
                                self.conn.make_path(self.path))
        self.md5 = self.compute_md5sum(StringIO.StringIO(data))
        return data