root / kamaki / clients / pithos.py @ c270fe96
History | View | Annotate | Download (25.8 kB)
1 |
# Copyright 2011-2012 GRNET S.A. All rights reserved.
|
---|---|
2 |
#
|
3 |
# Redistribution and use in source and binary forms, with or
|
4 |
# without modification, are permitted provided that the following
|
5 |
# conditions are met:
|
6 |
#
|
7 |
# 1. Redistributions of source code must retain the above
|
8 |
# copyright notice, this list of conditions and the following
|
9 |
# disclaimer.
|
10 |
#
|
11 |
# 2. Redistributions in binary form must reproduce the above
|
12 |
# copyright notice, this list of conditions and the following
|
13 |
# disclaimer in the documentation and/or other materials
|
14 |
# provided with the distribution.
|
15 |
#
|
16 |
# THIS SOFTWARE IS PROVIDED BY GRNET S.A. ``AS IS'' AND ANY EXPRESS
|
17 |
# OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
|
18 |
# WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
|
19 |
# PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL GRNET S.A OR
|
20 |
# CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
|
21 |
# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
|
22 |
# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
|
23 |
# USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
|
24 |
# AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
25 |
# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
|
26 |
# ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
|
27 |
# POSSIBILITY OF SUCH DAMAGE.
|
28 |
#
|
29 |
# The views and conclusions contained in the software and
|
30 |
# documentation are those of the authors and should not be
|
31 |
# interpreted as representing official policies, either expressed
|
32 |
# or implied, of GRNET S.A.
|
33 |
|
34 |
import gevent |
35 |
#import gevent.monkey
|
36 |
# Monkey-patch everything for gevent early on
|
37 |
#gevent.monkey.patch_all()
|
38 |
import gevent.pool |
39 |
|
40 |
from os import fstat, path |
41 |
from hashlib import new as newhashlib |
42 |
from time import time, sleep |
43 |
from datetime import datetime |
44 |
import sys |
45 |
|
46 |
from binascii import hexlify |
47 |
|
48 |
from kamaki.clients.pithos_rest_api import PithosRestAPI |
49 |
from kamaki.clients.storage import ClientError |
50 |
from kamaki.clients.utils import path4url, filter_in |
51 |
from StringIO import StringIO |
52 |
|
53 |
def pithos_hash(block, blockhash): |
54 |
h = newhashlib(blockhash) |
55 |
h.update(block.rstrip('\x00'))
|
56 |
return h.hexdigest()
|
57 |
|
58 |
def _range_up(start, end, a_range): |
59 |
if a_range:
|
60 |
(rstart, rend) = a_range.split('-')
|
61 |
(rstart, rend) = (int(rstart), int(rend)) |
62 |
if rstart > end or rend < start: |
63 |
return (0,0) |
64 |
if rstart > start:
|
65 |
start = rstart |
66 |
if rend < end:
|
67 |
end = rend |
68 |
return (start, end)
|
69 |
|
70 |
class PithosClient(PithosRestAPI): |
71 |
"""GRNet Pithos API client"""
|
72 |
|
73 |
def __init__(self, base_url, token, account=None, container = None): |
74 |
super(PithosClient, self).__init__(base_url, token, account = account, |
75 |
container = container) |
76 |
self.async_pool = None |
77 |
|
78 |
def purge_container(self): |
79 |
r = self.container_delete(until=unicode(time())) |
80 |
r.release() |
81 |
|
82 |
def upload_object_unchunked(self, obj, f, withHashFile = False, size=None, etag=None, |
83 |
content_encoding=None, content_disposition=None, content_type=None, sharing=None, |
84 |
public=None):
|
85 |
# This is a naive implementation, it loads the whole file in memory
|
86 |
#Look in pithos for a nice implementation
|
87 |
self.assert_container()
|
88 |
|
89 |
if withHashFile:
|
90 |
data = f.read() |
91 |
try:
|
92 |
import json |
93 |
data = json.dumps(json.loads(data)) |
94 |
except ValueError: |
95 |
raise ClientError(message='"%s" is not json-formated'%f.name, status=1) |
96 |
except SyntaxError: |
97 |
raise ClientError(message='"%s" is not a valid hashmap file'%f.name, status=1) |
98 |
f = StringIO(data) |
99 |
data = f.read(size) if size is not None else f.read() |
100 |
r = self.object_put(obj, data=data, etag=etag, content_encoding=content_encoding,
|
101 |
content_disposition=content_disposition, content_type=content_type, permitions=sharing, |
102 |
public=public, success=201)
|
103 |
r.release() |
104 |
|
105 |
#upload_* auxiliary methods
|
106 |
def put_block_async(self, data, hash): |
107 |
class SilentGreenlet(gevent.Greenlet): |
108 |
def _report_error(self, exc_info): |
109 |
try:
|
110 |
sys.stderr = StringIO() |
111 |
gevent.Greenlet._report_error(self, exc_info)
|
112 |
finally:
|
113 |
if hasattr(sys, '_stderr'): |
114 |
sys.stderr = _stderr |
115 |
POOL_SIZE = self.POOL_SIZE if hasattr(self, 'POOL_SIZE') else 5 |
116 |
if self.async_pool is None: |
117 |
self.async_pool = gevent.pool.Pool(size=POOL_SIZE)
|
118 |
g = SilentGreenlet(self.put_block, data, hash) |
119 |
self.async_pool.start(g)
|
120 |
return g
|
121 |
|
122 |
def put_block(self, data, hash): |
123 |
r = self.container_post(update=True, content_type='application/octet-stream', |
124 |
content_length=len(data), data=data, format='json') |
125 |
assert r.json[0] == hash, 'Local hash does not match server' |
126 |
|
127 |
def create_object_by_manifestation(self, obj, etag=None, content_encoding=None, |
128 |
content_disposition=None, content_type=None, sharing=None, public=None): |
129 |
self.assert_container()
|
130 |
obj_content_type = 'application/octet-stream' if content_type is None else content_type |
131 |
r = self.object_put(obj, content_length=0, etag=etag, content_encoding=content_encoding, |
132 |
content_disposition=content_disposition, content_type=content_type, permitions=sharing, |
133 |
public=public, manifest='%s/%s'%(self.container,obj)) |
134 |
r.release() |
135 |
|
136 |
def _get_file_block_info(self, fileobj, size=None): |
137 |
meta = self.get_container_info()
|
138 |
blocksize = int(meta['x-container-block-size']) |
139 |
blockhash = meta['x-container-block-hash']
|
140 |
size = size if size is not None else fstat(fileobj.fileno()).st_size |
141 |
nblocks = 1 + (size - 1) // blocksize |
142 |
return (blocksize, blockhash, size, nblocks)
|
143 |
|
144 |
def _get_missing_hashes(self, obj, json, size=None, format='json', hashmap=True, |
145 |
content_type=None, etag=None, content_encoding=None, content_disposition=None, |
146 |
permitions=None, public=None, success=(201, 409)): |
147 |
r = self.object_put(obj, format='json', hashmap=True, content_type=content_type, |
148 |
json=json, etag=etag, content_encoding=content_encoding, |
149 |
content_disposition=content_disposition, permitions=permitions, public=public, |
150 |
success=success) |
151 |
if r.status_code == 201: |
152 |
r.release() |
153 |
return None |
154 |
return r.json
|
155 |
|
156 |
def _caclulate_uploaded_blocks(self, blocksize, blockhash, size, nblocks, hashes, hmap, fileobj, |
157 |
hash_cb=None):
|
158 |
offset=0
|
159 |
if hash_cb:
|
160 |
hash_gen = hash_cb(nblocks) |
161 |
hash_gen.next() |
162 |
|
163 |
for i in range(nblocks): |
164 |
block = fileobj.read(min(blocksize, size - offset))
|
165 |
bytes = len(block)
|
166 |
hash = pithos_hash(block, blockhash) |
167 |
hashes.append(hash)
|
168 |
hmap[hash] = (offset, bytes) |
169 |
offset += bytes
|
170 |
if hash_cb:
|
171 |
hash_gen.next() |
172 |
assert offset == size
|
173 |
|
174 |
def _upload_missing_blocks(self, missing, hmap, fileobj, upload_cb=None): |
175 |
"""upload missing blocks asynchronously in a pseudo-parallel fashion (greenlets)
|
176 |
"""
|
177 |
if upload_cb:
|
178 |
upload_gen = upload_cb(len(missing))
|
179 |
upload_gen.next() |
180 |
|
181 |
flying = [] |
182 |
for hash in missing: |
183 |
offset, bytes = hmap[hash]
|
184 |
fileobj.seek(offset) |
185 |
data = fileobj.read(bytes)
|
186 |
r = self.put_block_async(data, hash) |
187 |
flying.append(r) |
188 |
for r in flying: |
189 |
if r.ready():
|
190 |
if r.exception:
|
191 |
raise r.exception
|
192 |
if upload_cb:
|
193 |
upload_gen.next() |
194 |
flying = [r for r in flying if not r.ready()] |
195 |
while upload_cb:
|
196 |
try:
|
197 |
upload_gen.next() |
198 |
except StopIteration: |
199 |
break
|
200 |
gevent.joinall(flying) |
201 |
|
202 |
failures = [r for r in flying if r.exception] |
203 |
if len(failures): |
204 |
details = ', '.join(['(%s).%s'%(i,r.exception) for i,r in enumerate(failures)]) |
205 |
raise ClientError(message="Block uploading failed", status=505, details=details) |
206 |
|
207 |
def upload_object(self, obj, f, size=None, hash_cb=None, upload_cb=None, etag=None, |
208 |
content_encoding=None, content_disposition=None, content_type=None, sharing=None, |
209 |
public=None):
|
210 |
self.assert_container()
|
211 |
|
212 |
#init
|
213 |
block_info = (blocksize, blockhash, size, nblocks) = self._get_file_block_info(f, size)
|
214 |
(hashes, hmap, offset) = ([], {}, 0)
|
215 |
content_type = 'application/octet-stream' if content_type is None else content_type |
216 |
|
217 |
self._caclulate_uploaded_blocks(*block_info, hashes=hashes, hmap=hmap, fileobj=f,
|
218 |
hash_cb=hash_cb) |
219 |
|
220 |
hashmap = dict(bytes=size, hashes=hashes)
|
221 |
missing = self._get_missing_hashes(obj, hashmap, content_type=content_type, size=size,
|
222 |
etag=etag, content_encoding=content_encoding, content_disposition=content_disposition, |
223 |
permitions=sharing, public=public) |
224 |
|
225 |
if missing is None: |
226 |
return
|
227 |
self._upload_missing_blocks(missing, hmap, f, upload_cb=upload_cb)
|
228 |
|
229 |
r = self.object_put(obj, format='json', hashmap=True, content_type=content_type, |
230 |
json=hashmap, success=201)
|
231 |
r.release() |
232 |
|
233 |
#download_* auxiliary methods
|
234 |
#ALl untested
|
235 |
def _get_remote_blocks_info(self, obj, **restargs): |
236 |
#retrieve object hashmap
|
237 |
myrange = restargs.pop('data_range') if 'data_range' in restargs.keys() else None |
238 |
hashmap = self.get_object_hashmap(obj, **restargs)
|
239 |
restargs['data_range'] = myrange
|
240 |
blocksize = int(hashmap['block_size']) |
241 |
blockhash = hashmap['block_hash']
|
242 |
total_size = hashmap['bytes']
|
243 |
#assert total_size/blocksize + 1 == len(hashmap['hashes'])
|
244 |
map_dict = {} |
245 |
for i, h in enumerate(hashmap['hashes']): |
246 |
map_dict[h] = i |
247 |
return (blocksize, blockhash, total_size, hashmap['hashes'], map_dict) |
248 |
|
249 |
def _dump_blocks_sync(self, obj, remote_hashes, blocksize, total_size, dst, range, **restargs): |
250 |
for blockid, blockhash in enumerate(remote_hashes): |
251 |
if blockhash == None: |
252 |
continue
|
253 |
start = blocksize*blockid |
254 |
end = total_size-1 if start+blocksize > total_size else start+blocksize-1 |
255 |
(start, end) = _range_up(start, end, range)
|
256 |
restargs['data_range'] = 'bytes=%s-%s'%(start, end) |
257 |
r = self.object_get(obj, success=(200, 206), **restargs) |
258 |
self._cb_next()
|
259 |
dst.write(r.content) |
260 |
dst.flush() |
261 |
|
262 |
def _get_block_async(self, obj, **restargs): |
263 |
class SilentGreenlet(gevent.Greenlet): |
264 |
def _report_error(self, exc_info): |
265 |
try:
|
266 |
sys.stderr = StringIO() |
267 |
gevent.Greenlet._report_error(self, exc_info)
|
268 |
finally:
|
269 |
if hasattr(sys, '_stderr'): |
270 |
sys.stderr = sys._stderr |
271 |
if not hasattr(self, 'POOL_SIZE'): |
272 |
self.POOL_SIZE = 5 |
273 |
if self.async_pool is None: |
274 |
self.async_pool = gevent.pool.Pool(size=self.POOL_SIZE) |
275 |
g = SilentGreenlet(self.object_get, obj, success=(200, 206), **restargs) |
276 |
self.async_pool.start(g)
|
277 |
return g
|
278 |
|
279 |
def _hash_from_file(self, fp, start, size, blockhash): |
280 |
fp.seek(start) |
281 |
block = fp.read(size) |
282 |
h = newhashlib(blockhash) |
283 |
h.update(block.strip('\x00'))
|
284 |
return hexlify(h.digest())
|
285 |
|
286 |
def _greenlet2file(self, flying_greenlets, local_file, offset = 0, **restargs): |
287 |
"""write the results of a greenleted rest call to a file
|
288 |
@offset: the offset of the file up to blocksize - e.g. if the range is 10-100, all
|
289 |
blocks will be written to normal_position - 10"""
|
290 |
finished = [] |
291 |
for start, g in flying_greenlets.items(): |
292 |
if g.ready():
|
293 |
if g.exception:
|
294 |
raise g.exception
|
295 |
block = g.value.content |
296 |
local_file.seek(start - offset) |
297 |
local_file.write(block) |
298 |
self._cb_next()
|
299 |
finished.append(flying_greenlets.pop(start)) |
300 |
local_file.flush() |
301 |
return finished
|
302 |
|
303 |
def _dump_blocks_async(self, obj, remote_hashes, blocksize, total_size, local_file, |
304 |
blockhash=None, resume=False, filerange = None, **restargs): |
305 |
|
306 |
file_size = fstat(local_file.fileno()).st_size if resume else 0 |
307 |
flying_greenlets = {} |
308 |
finished_greenlets = [] |
309 |
offset = 0
|
310 |
if filerange is not None: |
311 |
rstart = int(filerange.split('-')[0]) |
312 |
offset = rstart if blocksize > rstart else rstart%blocksize |
313 |
for block_hash, blockid in remote_hashes.items(): |
314 |
start = blocksize*blockid |
315 |
if start < file_size and block_hash == self._hash_from_file(local_file, |
316 |
start, blocksize, blockhash): |
317 |
self._cb_next()
|
318 |
continue
|
319 |
if len(flying_greenlets) >= self.POOL_SIZE: |
320 |
finished_greenlets += self._greenlet2file(flying_greenlets, local_file, offset,
|
321 |
**restargs) |
322 |
end = total_size-1 if start+blocksize > total_size else start+blocksize-1 |
323 |
(start, end) = _range_up(start, end, filerange) |
324 |
if start == end:
|
325 |
self._cb_next()
|
326 |
continue
|
327 |
restargs['async_headers'] = dict(Range='bytes=%s-%s'%(start, end)) |
328 |
flying_greenlets[start] = self._get_block_async(obj, **restargs)
|
329 |
|
330 |
#check the greenlets
|
331 |
while len(flying_greenlets) > 0: |
332 |
sleep(0.001)
|
333 |
finished_greenlets += self._greenlet2file(flying_greenlets, local_file, offset,
|
334 |
**restargs) |
335 |
|
336 |
gevent.joinall(finished_greenlets) |
337 |
|
338 |
def download_object(self, obj, dst, download_cb=None, version=None, overide=False, resume=False, |
339 |
range=None, if_match=None, if_none_match=None, if_modified_since=None, |
340 |
if_unmodified_since=None):
|
341 |
|
342 |
restargs=dict(version=version,
|
343 |
data_range = None if range is None else 'bytes=%s'%range, |
344 |
if_match=if_match, |
345 |
if_none_match=if_none_match, |
346 |
if_modified_since=if_modified_since, |
347 |
if_unmodified_since=if_unmodified_since) |
348 |
|
349 |
( blocksize, |
350 |
blockhash, |
351 |
total_size, |
352 |
hash_list, |
353 |
remote_hashes) = self._get_remote_blocks_info(obj, **restargs)
|
354 |
assert total_size >= 0 |
355 |
self.POOL_SIZE = 5 |
356 |
|
357 |
if download_cb:
|
358 |
self.progress_bar_gen = download_cb(len(remote_hashes)) |
359 |
self._cb_next()
|
360 |
|
361 |
if dst.isatty():
|
362 |
self._dump_blocks_sync(obj, hash_list, blocksize, total_size, dst, range, **restargs) |
363 |
else:
|
364 |
self._dump_blocks_async(obj, remote_hashes, blocksize, total_size, dst, blockhash,
|
365 |
resume, range, **restargs)
|
366 |
if range is None: |
367 |
dst.truncate(total_size) |
368 |
|
369 |
self._complete_cb()
|
370 |
|
371 |
#Command Progress Bar method
|
372 |
def _cb_next(self): |
373 |
if hasattr(self, 'progress_bar_gen'): |
374 |
try:
|
375 |
self.progress_bar_gen.next()
|
376 |
except:
|
377 |
pass
|
378 |
def _complete_cb(self): |
379 |
while True: |
380 |
try:
|
381 |
self.progress_bar_gen.next()
|
382 |
except:
|
383 |
break
|
384 |
|
385 |
#Untested - except is download_object is tested first
|
386 |
def get_object_hashmap(self, obj, version=None, if_match=None, if_none_match=None, |
387 |
if_modified_since=None, if_unmodified_since=None, data_range=None): |
388 |
try:
|
389 |
r = self.object_get(obj, hashmap=True, version=version, if_etag_match=if_match, |
390 |
if_etag_not_match=if_none_match, if_modified_since=if_modified_since, |
391 |
if_unmodified_since=if_unmodified_since, data_range=data_range) |
392 |
except ClientError as err: |
393 |
if err.status == 304 or err.status == 412: |
394 |
return {}
|
395 |
raise
|
396 |
return r.json
|
397 |
|
398 |
def set_account_group(self, group, usernames): |
399 |
r = self.account_post(update=True, groups = {group:usernames}) |
400 |
r.release() |
401 |
|
402 |
def del_account_group(self, group): |
403 |
r = self.account_post(update=True, groups={group:[]}) |
404 |
r.release() |
405 |
|
406 |
def get_account_info(self, until=None): |
407 |
r = self.account_head(until=until)
|
408 |
if r.status_code == 401: |
409 |
raise ClientError("No authorization") |
410 |
return r.headers
|
411 |
|
412 |
def get_account_quota(self): |
413 |
return filter_in(self.get_account_info(), 'X-Account-Policy-Quota', exactMatch = True) |
414 |
|
415 |
def get_account_versioning(self): |
416 |
return filter_in(self.get_account_info(), 'X-Account-Policy-Versioning', exactMatch = True) |
417 |
|
418 |
def get_account_meta(self, until=None): |
419 |
return filter_in(self.get_account_info(until = until), 'X-Account-Meta-') |
420 |
|
421 |
def get_account_group(self): |
422 |
return filter_in(self.get_account_info(), 'X-Account-Group-') |
423 |
|
424 |
def set_account_meta(self, metapairs): |
425 |
assert(type(metapairs) is dict) |
426 |
r = self.account_post(update=True, metadata=metapairs) |
427 |
r.release() |
428 |
|
429 |
def del_account_meta(self, metakey): |
430 |
r = self.account_post(update=True, metadata={metakey:''}) |
431 |
r.release() |
432 |
|
433 |
def set_account_quota(self, quota): |
434 |
r = self.account_post(update=True, quota=quota) |
435 |
r.release() |
436 |
|
437 |
def set_account_versioning(self, versioning): |
438 |
r = self.account_post(update=True, versioning = versioning) |
439 |
r.release() |
440 |
|
441 |
def list_containers(self): |
442 |
r = self.account_get()
|
443 |
return r.json
|
444 |
|
445 |
def del_container(self, until=None, delimiter=None): |
446 |
self.assert_container()
|
447 |
r = self.container_delete(until=until, delimiter=delimiter, success=(204, 404, 409)) |
448 |
r.release() |
449 |
if r.status_code == 404: |
450 |
raise ClientError('Container "%s" does not exist'%self.container, r.status_code) |
451 |
elif r.status_code == 409: |
452 |
raise ClientError('Container "%s" is not empty'%self.container, r.status_code) |
453 |
|
454 |
def get_container_versioning(self, container): |
455 |
self.container = container
|
456 |
return filter_in(self.get_container_info(), 'X-Container-Policy-Versioning') |
457 |
|
458 |
def get_container_quota(self, container): |
459 |
self.container = container
|
460 |
return filter_in(self.get_container_info(), 'X-Container-Policy-Quota') |
461 |
|
462 |
def get_container_info(self, until = None): |
463 |
r = self.container_head(until=until)
|
464 |
return r.headers
|
465 |
|
466 |
def get_container_meta(self, until = None): |
467 |
return filter_in(self.get_container_info(until=until), 'X-Container-Meta') |
468 |
|
469 |
def get_container_object_meta(self, until = None): |
470 |
return filter_in(self.get_container_info(until=until), 'X-Container-Object-Meta') |
471 |
|
472 |
def set_container_meta(self, metapairs): |
473 |
assert(type(metapairs) is dict) |
474 |
r = self.container_post(update=True, metadata=metapairs) |
475 |
r.release() |
476 |
|
477 |
def del_container_meta(self, metakey): |
478 |
r = self.container_post(update=True, metadata={metakey:''}) |
479 |
r.release() |
480 |
|
481 |
def set_container_quota(self, quota): |
482 |
r = self.container_post(update=True, quota=quota) |
483 |
r.release() |
484 |
|
485 |
def set_container_versioning(self, versioning): |
486 |
r = self.container_post(update=True, versioning=versioning) |
487 |
r.release() |
488 |
|
489 |
def del_object(self, obj, until=None, delimiter=None): |
490 |
self.assert_container()
|
491 |
r = self.object_delete(obj, until=until, delimiter=delimiter)
|
492 |
r.release() |
493 |
|
494 |
def set_object_meta(self, object, metapairs): |
495 |
assert(type(metapairs) is dict) |
496 |
r = self.object_post(object, update=True, metadata=metapairs) |
497 |
r.release() |
498 |
|
499 |
def del_object_meta(self, metakey, object): |
500 |
r = self.object_post(object, update=True, metadata={metakey:''}) |
501 |
r.release() |
502 |
|
503 |
def publish_object(self, object): |
504 |
r = self.object_post(object, update=True, public=True) |
505 |
r.release() |
506 |
|
507 |
def unpublish_object(self, object): |
508 |
r = self.object_post(object, update=True, public=False) |
509 |
r.release() |
510 |
|
511 |
def get_object_info(self, obj, version=None): |
512 |
r = self.object_head(obj, version=version)
|
513 |
return r.headers
|
514 |
|
515 |
def get_object_meta(self, obj, version=None): |
516 |
return filter_in(self.get_object_info(obj, version=version), 'X-Object-Meta') |
517 |
|
518 |
def get_object_sharing(self, object): |
519 |
r = filter_in(self.get_object_info(object), 'X-Object-Sharing', exactMatch = True) |
520 |
reply = {} |
521 |
if len(r) > 0: |
522 |
perms = r['x-object-sharing'].split(';') |
523 |
for perm in perms: |
524 |
try:
|
525 |
perm.index('=')
|
526 |
except ValueError: |
527 |
raise ClientError('Incorrect reply format') |
528 |
(key, val) = perm.strip().split('=')
|
529 |
reply[key] = val |
530 |
return reply
|
531 |
|
532 |
def set_object_sharing(self, object, read_permition = False, write_permition = False): |
533 |
"""Give read/write permisions to an object.
|
534 |
@param object is the object to change sharing permitions onto
|
535 |
@param read_permition is a list of users and user groups that get read permition for this object
|
536 |
False means all previous read permitions will be removed
|
537 |
@param write_perimition is a list of users and user groups to get write permition for this object
|
538 |
False means all previous read permitions will be removed
|
539 |
"""
|
540 |
perms = {} |
541 |
perms['read'] = read_permition if isinstance(read_permition, list) else '' |
542 |
perms['write'] = write_permition if isinstance(write_permition, list) else '' |
543 |
r = self.object_post(object, update=True, permitions=perms) |
544 |
r.release() |
545 |
|
546 |
def del_object_sharing(self, object): |
547 |
self.set_object_sharing(object) |
548 |
|
549 |
def append_object(self, object, source_file, upload_cb = None): |
550 |
"""@param upload_db is a generator for showing progress of upload
|
551 |
to caller application, e.g. a progress bar. Its next is called
|
552 |
whenever a block is uploaded
|
553 |
"""
|
554 |
self.assert_container()
|
555 |
meta = self.get_container_info()
|
556 |
blocksize = int(meta['x-container-block-size']) |
557 |
filesize = fstat(source_file.fileno()).st_size |
558 |
nblocks = 1 + (filesize - 1)//blocksize |
559 |
offset = 0
|
560 |
if upload_cb is not None: |
561 |
upload_gen = upload_cb(nblocks) |
562 |
for i in range(nblocks): |
563 |
block = source_file.read(min(blocksize, filesize - offset))
|
564 |
offset += len(block)
|
565 |
r = self.object_post(object, update=True, content_range='bytes */*', |
566 |
content_type='application/octet-stream', content_length=len(block), data=block) |
567 |
r.release() |
568 |
|
569 |
if upload_cb is not None: |
570 |
upload_gen.next() |
571 |
|
572 |
def truncate_object(self, object, upto_bytes): |
573 |
r = self.object_post(object, update=True, content_range='bytes 0-%s/*'%upto_bytes, |
574 |
content_type='application/octet-stream', object_bytes=upto_bytes,
|
575 |
source_object=path4url(self.container, object)) |
576 |
r.release() |
577 |
|
578 |
def overwrite_object(self, object, start, end, source_file, upload_cb=None): |
579 |
"""Overwrite a part of an object with given source file
|
580 |
@start the part of the remote object to start overwriting from, in bytes
|
581 |
@end the part of the remote object to stop overwriting to, in bytes
|
582 |
"""
|
583 |
self.assert_container()
|
584 |
meta = self.get_container_info()
|
585 |
blocksize = int(meta['x-container-block-size']) |
586 |
filesize = fstat(source_file.fileno()).st_size |
587 |
datasize = int(end) - int(start) + 1 |
588 |
nblocks = 1 + (datasize - 1)//blocksize |
589 |
offset = 0
|
590 |
if upload_cb is not None: |
591 |
upload_gen = upload_cb(nblocks) |
592 |
for i in range(nblocks): |
593 |
block = source_file.read(min(blocksize, filesize - offset, datasize - offset))
|
594 |
offset += len(block)
|
595 |
r = self.object_post(object, update=True, content_type='application/octet-stream', |
596 |
content_length=len(block), content_range='bytes %s-%s/*'%(start,end), data=block) |
597 |
r.release() |
598 |
|
599 |
if upload_cb is not None: |
600 |
upload_gen.next() |
601 |
|
602 |
def copy_object(self, src_container, src_object, dst_container, dst_object=False, |
603 |
source_version = None, public=False, content_type=None, delimiter=None): |
604 |
self.assert_account()
|
605 |
self.container = dst_container
|
606 |
dst_object = dst_object or src_object
|
607 |
src_path = path4url(src_container, src_object) |
608 |
r = self.object_put(dst_object, success=201, copy_from=src_path, content_length=0, |
609 |
source_version=source_version, public=public, content_type=content_type, |
610 |
delimiter=delimiter) |
611 |
r.release() |
612 |
|
613 |
def move_object(self, src_container, src_object, dst_container, dst_object=False, |
614 |
source_version = None, public=False, content_type=None, delimiter=None): |
615 |
self.assert_account()
|
616 |
self.container = dst_container
|
617 |
dst_object = dst_object or src_object
|
618 |
src_path = path4url(src_container, src_object) |
619 |
r = self.object_put(dst_object, success=201, move_from=src_path, content_length=0, |
620 |
source_version=source_version, public=public, content_type=content_type, |
621 |
delimiter=delimiter) |
622 |
r.release() |
623 |
|
624 |
def get_sharing_accounts(self, limit=None, marker=None, *args, **kwargs): |
625 |
"""Get accounts that share with self.account"""
|
626 |
self.assert_account()
|
627 |
|
628 |
self.set_param('format','json') |
629 |
self.set_param('limit',limit, iff = limit is not None) |
630 |
self.set_param('marker',marker, iff = marker is not None) |
631 |
|
632 |
path = ''
|
633 |
success = kwargs.pop('success', (200, 204)) |
634 |
r = self.get(path, *args, success = success, **kwargs)
|
635 |
return r.json
|
636 |
|
637 |
def get_object_versionlist(self, path): |
638 |
self.assert_container()
|
639 |
r = self.object_get(path, format='json', version='list') |
640 |
return r.json['versions'] |