root / kamaki / clients / pithos.py @ 3dabe5d2
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# Copyright 2011-2012 GRNET S.A. All rights reserved.
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#
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# Redistribution and use in source and binary forms, with or
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# without modification, are permitted provided that the following
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# conditions are met:
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#
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# 1. Redistributions of source code must retain the above
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# copyright notice, this list of conditions and the following
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# disclaimer.
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#
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# 2. Redistributions in binary form must reproduce the above
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# copyright notice, this list of conditions and the following
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# disclaimer in the documentation and/or other materials
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# provided with the distribution.
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#
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# THIS SOFTWARE IS PROVIDED BY GRNET S.A. ``AS IS'' AND ANY EXPRESS
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# OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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# WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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# PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL GRNET S.A OR
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# CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
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# USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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# AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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# ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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# POSSIBILITY OF SUCH DAMAGE.
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#
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# The views and conclusions contained in the software and
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# documentation are those of the authors and should not be
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# interpreted as representing official policies, either expressed
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# or implied, of GRNET S.A.
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import gevent |
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#import gevent.monkey
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# Monkey-patch everything for gevent early on
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#gevent.monkey.patch_all()
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import gevent.pool |
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from os import fstat |
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from hashlib import new as newhashlib |
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from time import time, sleep |
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import sys |
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from binascii import hexlify |
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from kamaki.clients.pithos_rest_api import PithosRestAPI |
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from kamaki.clients.storage import ClientError |
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from kamaki.clients.utils import path4url, filter_in |
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from StringIO import StringIO |
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def pithos_hash(block, blockhash): |
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h = newhashlib(blockhash) |
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h.update(block.rstrip('\x00'))
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return h.hexdigest()
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def _range_up(start, end, a_range): |
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if a_range:
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(rstart, rend) = a_range.split('-')
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(rstart, rend) = (int(rstart), int(rend)) |
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if rstart > end or rend < start: |
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return (0, 0) |
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if rstart > start:
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start = rstart |
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if rend < end:
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end = rend |
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return (start, end)
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class PithosClient(PithosRestAPI): |
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"""GRNet Pithos API client"""
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def __init__(self, base_url, token, account=None, container=None): |
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super(PithosClient, self).__init__(base_url, token, account, container) |
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self.async_pool = None |
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|
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def purge_container(self): |
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r = self.container_delete(until=unicode(time())) |
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r.release() |
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def upload_object_unchunked(self, obj, f, |
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withHashFile=False,
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size=None,
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etag=None,
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content_encoding=None,
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content_disposition=None,
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content_type=None,
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sharing=None,
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public=None):
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self.assert_container()
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if withHashFile:
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data = f.read() |
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try:
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import json |
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data = json.dumps(json.loads(data)) |
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except ValueError: |
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raise ClientError(message='"%s" is not json-formated' % f.name, |
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status=1)
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except SyntaxError: |
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raise ClientError(message='"%s" is not a valid hashmap file'\ |
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% f.name, status=1)
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f = StringIO(data) |
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data = f.read(size) if size is not None else f.read() |
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r = self.object_put(obj,
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data=data, |
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etag=etag, |
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content_encoding=content_encoding, |
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content_disposition=content_disposition, |
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content_type=content_type, |
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permissions=sharing, |
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public=public, |
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success=201)
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r.release() |
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# upload_* auxiliary methods
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def put_block_async(self, data, hash): |
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class SilentGreenlet(gevent.Greenlet): |
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def _report_error(self, exc_info): |
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try:
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sys.stderr = StringIO() |
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gevent.Greenlet._report_error(self, exc_info)
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finally:
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if hasattr(sys, '_stderr'): |
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sys.stderr = sys._stderr |
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POOL_SIZE = self.POOL_SIZE if hasattr(self, 'POOL_SIZE') else 5 |
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if self.async_pool is None: |
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self.async_pool = gevent.pool.Pool(size=POOL_SIZE)
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g = SilentGreenlet(self.put_block, data, hash) |
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self.async_pool.start(g)
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return g
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def put_block(self, data, hash): |
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r = self.container_post(update=True, |
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content_type='application/octet-stream',
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content_length=len(data),
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data=data, |
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format='json')
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assert r.json[0] == hash, 'Local hash does not match server' |
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def create_object_by_manifestation(self, obj, |
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etag=None,
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content_encoding=None,
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content_disposition=None,
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content_type=None,
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sharing=None,
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public=None):
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self.assert_container()
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r = self.object_put(obj,
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content_length=0,
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etag=etag, |
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content_encoding=content_encoding, |
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content_disposition=content_disposition, |
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content_type=content_type, |
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permissions=sharing, |
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public=public, |
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manifest='%s/%s' % (self.container, obj)) |
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r.release() |
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def _get_file_block_info(self, fileobj, size=None): |
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meta = self.get_container_info()
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blocksize = int(meta['x-container-block-size']) |
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blockhash = meta['x-container-block-hash']
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size = size if size is not None else fstat(fileobj.fileno()).st_size |
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nblocks = 1 + (size - 1) // blocksize |
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return (blocksize, blockhash, size, nblocks)
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def _get_missing_hashes(self, obj, json, |
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size=None,
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format='json',
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hashmap=True,
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content_type=None,
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etag=None,
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content_encoding=None,
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content_disposition=None,
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permissions=None,
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public=None,
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success=(201, 409)): |
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r = self.object_put(obj,
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format='json',
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hashmap=True,
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content_type=content_type, |
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json=json, |
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etag=etag, |
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content_encoding=content_encoding, |
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content_disposition=content_disposition, |
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permissions=permissions, |
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public=public, |
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success=success) |
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if r.status_code == 201: |
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r.release() |
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return None |
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return r.json
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def _caclulate_uploaded_blocks(self, |
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blocksize, |
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blockhash, |
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size, |
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nblocks, |
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hashes, |
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hmap, |
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fileobj, |
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hash_cb=None):
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offset = 0
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if hash_cb:
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hash_gen = hash_cb(nblocks) |
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hash_gen.next() |
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for i in range(nblocks): |
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block = fileobj.read(min(blocksize, size - offset))
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bytes = len(block)
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hash = pithos_hash(block, blockhash) |
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hashes.append(hash)
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hmap[hash] = (offset, bytes) |
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offset += bytes
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if hash_cb:
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hash_gen.next() |
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assert offset == size
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def _upload_missing_blocks(self, missing, hmap, fileobj, upload_cb=None): |
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"""upload missing blocks asynchronously. Use greenlets to avoid waiting
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"""
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if upload_cb:
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upload_gen = upload_cb(len(missing))
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upload_gen.next() |
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flying = [] |
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for hash in missing: |
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offset, bytes = hmap[hash]
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fileobj.seek(offset) |
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data = fileobj.read(bytes)
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r = self.put_block_async(data, hash) |
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flying.append(r) |
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for r in flying: |
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if r.ready():
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if r.exception:
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raise r.exception
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if upload_cb:
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upload_gen.next() |
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flying = [r for r in flying if not r.ready()] |
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while upload_cb:
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try:
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upload_gen.next() |
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except StopIteration: |
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break
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gevent.joinall(flying) |
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failures = [r for r in flying if r.exception] |
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if len(failures): |
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details = ', '.join(['(%s).%s' % (i, r.exception)\ |
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for i, r in enumerate(failures)]) |
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raise ClientError(message="Block uploading failed", |
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status=505,
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details=details) |
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def upload_object(self, obj, f, |
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size=None,
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hash_cb=None,
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upload_cb=None,
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etag=None,
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content_encoding=None,
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content_disposition=None,
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content_type=None,
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sharing=None,
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public=None):
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self.assert_container()
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#init
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block_info = (blocksize, blockhash, size, nblocks) =\ |
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self._get_file_block_info(f, size)
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(hashes, hmap, offset) = ([], {}, 0)
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if content_type is None: |
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content_type = 'application/octet-stream'
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self._caclulate_uploaded_blocks(*block_info,
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hashes=hashes, |
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hmap=hmap, |
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fileobj=f, |
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hash_cb=hash_cb) |
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hashmap = dict(bytes=size, hashes=hashes)
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missing = self._get_missing_hashes(obj, hashmap,
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content_type=content_type, |
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size=size, |
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etag=etag, |
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content_encoding=content_encoding, |
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content_disposition=content_disposition, |
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permissions=sharing, |
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public=public) |
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if missing is None: |
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return
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self._upload_missing_blocks(missing, hmap, f, upload_cb=upload_cb)
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r = self.object_put(obj,
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format='json',
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hashmap=True,
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content_type=content_type, |
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json=hashmap, |
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success=201)
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r.release() |
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|
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#download_* auxiliary methods
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#ALl untested
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def _get_remote_blocks_info(self, obj, **restargs): |
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#retrieve object hashmap
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myrange = restargs.pop('data_range', None) |
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hashmap = self.get_object_hashmap(obj, **restargs)
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restargs['data_range'] = myrange
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blocksize = int(hashmap['block_size']) |
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blockhash = hashmap['block_hash']
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total_size = hashmap['bytes']
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#assert total_size/blocksize + 1 == len(hashmap['hashes'])
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map_dict = {} |
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for i, h in enumerate(hashmap['hashes']): |
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map_dict[h] = i |
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return (blocksize, blockhash, total_size, hashmap['hashes'], map_dict) |
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|
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def _dump_blocks_sync(self, |
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obj, |
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remote_hashes, |
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blocksize, |
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total_size, |
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dst, |
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range,
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**restargs): |
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for blockid, blockhash in enumerate(remote_hashes): |
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if blockhash == None: |
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continue
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start = blocksize * blockid |
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end = total_size - 1 if start + blocksize > total_size\ |
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else start + blocksize - 1 |
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(start, end) = _range_up(start, end, range)
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restargs['data_range'] = 'bytes=%s-%s' % (start, end) |
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r = self.object_get(obj, success=(200, 206), **restargs) |
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self._cb_next()
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dst.write(r.content) |
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dst.flush() |
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|
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def _get_block_async(self, obj, **restargs): |
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class SilentGreenlet(gevent.Greenlet): |
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def _report_error(self, exc_info): |
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try:
|
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sys.stderr = StringIO() |
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gevent.Greenlet._report_error(self, exc_info)
|
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finally:
|
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if hasattr(sys, '_stderr'): |
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sys.stderr = sys._stderr |
351 |
if not hasattr(self, 'POOL_SIZE'): |
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self.POOL_SIZE = 5 |
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if self.async_pool is None: |
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self.async_pool = gevent.pool.Pool(size=self.POOL_SIZE) |
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g = SilentGreenlet(self.object_get, obj,
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success=(200, 206), |
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**restargs) |
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self.async_pool.start(g)
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return g
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|
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def _hash_from_file(self, fp, start, size, blockhash): |
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fp.seek(start) |
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block = fp.read(size) |
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h = newhashlib(blockhash) |
365 |
h.update(block.strip('\x00'))
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return hexlify(h.digest())
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|
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def _greenlet2file(self, |
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flying_greenlets, |
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local_file, |
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offset=0,
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**restargs): |
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"""write the results of a greenleted rest call to a file
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@offset: the offset of the file up to blocksize
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- e.g. if the range is 10-100, all
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blocks will be written to normal_position - 10"""
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377 |
finished = [] |
378 |
for start, g in flying_greenlets.items(): |
379 |
if g.ready():
|
380 |
if g.exception:
|
381 |
raise g.exception
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block = g.value.content |
383 |
local_file.seek(start - offset) |
384 |
local_file.write(block) |
385 |
self._cb_next()
|
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finished.append(flying_greenlets.pop(start)) |
387 |
local_file.flush() |
388 |
return finished
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|
390 |
def _dump_blocks_async(self, |
391 |
obj, |
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remote_hashes, |
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blocksize, |
394 |
total_size, |
395 |
local_file, |
396 |
blockhash=None,
|
397 |
resume=False,
|
398 |
filerange=None,
|
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**restargs): |
400 |
|
401 |
file_size = fstat(local_file.fileno()).st_size if resume else 0 |
402 |
flying_greenlets = {} |
403 |
finished_greenlets = [] |
404 |
offset = 0
|
405 |
if filerange is not None: |
406 |
rstart = int(filerange.split('-')[0]) |
407 |
offset = rstart if blocksize > rstart else rstart % blocksize |
408 |
for block_hash, blockid in remote_hashes.items(): |
409 |
start = blocksize * blockid |
410 |
if start < file_size\
|
411 |
and block_hash == self._hash_from_file(local_file, |
412 |
start, |
413 |
blocksize, |
414 |
blockhash): |
415 |
self._cb_next()
|
416 |
continue
|
417 |
if len(flying_greenlets) >= self.POOL_SIZE: |
418 |
finished_greenlets += self._greenlet2file(flying_greenlets,
|
419 |
local_file, |
420 |
offset, |
421 |
**restargs) |
422 |
end = total_size - 1 if start + blocksize > total_size\ |
423 |
else start + blocksize - 1 |
424 |
(start, end) = _range_up(start, end, filerange) |
425 |
if start == end:
|
426 |
self._cb_next()
|
427 |
continue
|
428 |
restargs['async_headers'] = {'Range': 'bytes=%s-%s' % (start, end)} |
429 |
flying_greenlets[start] = self._get_block_async(obj, **restargs)
|
430 |
|
431 |
#check the greenlets
|
432 |
while len(flying_greenlets) > 0: |
433 |
sleep(0.001)
|
434 |
finished_greenlets += self._greenlet2file(flying_greenlets,
|
435 |
local_file, |
436 |
offset, |
437 |
**restargs) |
438 |
|
439 |
gevent.joinall(finished_greenlets) |
440 |
|
441 |
def download_object(self, |
442 |
obj, |
443 |
dst, |
444 |
download_cb=None,
|
445 |
version=None,
|
446 |
overide=False,
|
447 |
resume=False,
|
448 |
range=None,
|
449 |
if_match=None,
|
450 |
if_none_match=None,
|
451 |
if_modified_since=None,
|
452 |
if_unmodified_since=None):
|
453 |
|
454 |
restargs = dict(version=version,
|
455 |
data_range=None if range is None else 'bytes=%s' % range, |
456 |
if_match=if_match, |
457 |
if_none_match=if_none_match, |
458 |
if_modified_since=if_modified_since, |
459 |
if_unmodified_since=if_unmodified_since) |
460 |
|
461 |
(blocksize, |
462 |
blockhash, |
463 |
total_size, |
464 |
hash_list, |
465 |
remote_hashes) = self._get_remote_blocks_info(obj, **restargs)
|
466 |
assert total_size >= 0 |
467 |
self.POOL_SIZE = 5 |
468 |
|
469 |
if download_cb:
|
470 |
self.progress_bar_gen = download_cb(len(remote_hashes)) |
471 |
self._cb_next()
|
472 |
|
473 |
if dst.isatty():
|
474 |
self._dump_blocks_sync(obj,
|
475 |
hash_list, |
476 |
blocksize, |
477 |
total_size, |
478 |
dst, |
479 |
range,
|
480 |
**restargs) |
481 |
else:
|
482 |
self._dump_blocks_async(obj,
|
483 |
remote_hashes, |
484 |
blocksize, |
485 |
total_size, |
486 |
dst, |
487 |
blockhash, |
488 |
resume, |
489 |
range,
|
490 |
**restargs) |
491 |
if range is None: |
492 |
dst.truncate(total_size) |
493 |
|
494 |
self._complete_cb()
|
495 |
|
496 |
#Command Progress Bar method
|
497 |
def _cb_next(self): |
498 |
if hasattr(self, 'progress_bar_gen'): |
499 |
try:
|
500 |
self.progress_bar_gen.next()
|
501 |
except:
|
502 |
pass
|
503 |
|
504 |
def _complete_cb(self): |
505 |
while True: |
506 |
try:
|
507 |
self.progress_bar_gen.next()
|
508 |
except:
|
509 |
break
|
510 |
|
511 |
# Untested - except is download_object is tested first
|
512 |
def get_object_hashmap(self, obj, |
513 |
version=None,
|
514 |
if_match=None,
|
515 |
if_none_match=None,
|
516 |
if_modified_since=None,
|
517 |
if_unmodified_since=None,
|
518 |
data_range=None):
|
519 |
try:
|
520 |
r = self.object_get(obj,
|
521 |
hashmap=True,
|
522 |
version=version, |
523 |
if_etag_match=if_match, |
524 |
if_etag_not_match=if_none_match, |
525 |
if_modified_since=if_modified_since, |
526 |
if_unmodified_since=if_unmodified_since, |
527 |
data_range=data_range) |
528 |
except ClientError as err: |
529 |
if err.status == 304 or err.status == 412: |
530 |
return {}
|
531 |
raise
|
532 |
return r.json
|
533 |
|
534 |
def set_account_group(self, group, usernames): |
535 |
r = self.account_post(update=True, groups={group: usernames}) |
536 |
r.release() |
537 |
|
538 |
def del_account_group(self, group): |
539 |
r = self.account_post(update=True, groups={group: []}) |
540 |
r.release() |
541 |
|
542 |
def get_account_info(self, until=None): |
543 |
r = self.account_head(until=until)
|
544 |
if r.status_code == 401: |
545 |
raise ClientError("No authorization") |
546 |
return r.headers
|
547 |
|
548 |
def get_account_quota(self): |
549 |
return filter_in(self.get_account_info(), |
550 |
'X-Account-Policy-Quota',
|
551 |
exactMatch=True)
|
552 |
|
553 |
def get_account_versioning(self): |
554 |
return filter_in(self.get_account_info(), |
555 |
'X-Account-Policy-Versioning',
|
556 |
exactMatch=True)
|
557 |
|
558 |
def get_account_meta(self, until=None): |
559 |
return filter_in(self.get_account_info(until=until), 'X-Account-Meta-') |
560 |
|
561 |
def get_account_group(self): |
562 |
return filter_in(self.get_account_info(), 'X-Account-Group-') |
563 |
|
564 |
def set_account_meta(self, metapairs): |
565 |
assert(type(metapairs) is dict) |
566 |
r = self.account_post(update=True, metadata=metapairs) |
567 |
r.release() |
568 |
|
569 |
def del_account_meta(self, metakey): |
570 |
r = self.account_post(update=True, metadata={metakey: ''}) |
571 |
r.release() |
572 |
|
573 |
def set_account_quota(self, quota): |
574 |
r = self.account_post(update=True, quota=quota) |
575 |
r.release() |
576 |
|
577 |
def set_account_versioning(self, versioning): |
578 |
r = self.account_post(update=True, versioning=versioning) |
579 |
r.release() |
580 |
|
581 |
def list_containers(self): |
582 |
r = self.account_get()
|
583 |
return r.json
|
584 |
|
585 |
def del_container(self, until=None, delimiter=None): |
586 |
self.assert_container()
|
587 |
r = self.container_delete(until=until,
|
588 |
delimiter=delimiter, |
589 |
success=(204, 404, 409)) |
590 |
r.release() |
591 |
if r.status_code == 404: |
592 |
raise ClientError('Container "%s" does not exist' % self.container, |
593 |
r.status_code) |
594 |
elif r.status_code == 409: |
595 |
raise ClientError('Container "%s" is not empty' % self.container, |
596 |
r.status_code) |
597 |
|
598 |
def get_container_versioning(self, container): |
599 |
self.container = container
|
600 |
return filter_in(self.get_container_info(), |
601 |
'X-Container-Policy-Versioning')
|
602 |
|
603 |
def get_container_quota(self, container): |
604 |
self.container = container
|
605 |
return filter_in(self.get_container_info(), 'X-Container-Policy-Quota') |
606 |
|
607 |
def get_container_info(self, until=None): |
608 |
r = self.container_head(until=until)
|
609 |
return r.headers
|
610 |
|
611 |
def get_container_meta(self, until=None): |
612 |
return filter_in(self.get_container_info(until=until), |
613 |
'X-Container-Meta')
|
614 |
|
615 |
def get_container_object_meta(self, until=None): |
616 |
return filter_in(self.get_container_info(until=until), |
617 |
'X-Container-Object-Meta')
|
618 |
|
619 |
def set_container_meta(self, metapairs): |
620 |
assert(type(metapairs) is dict) |
621 |
r = self.container_post(update=True, metadata=metapairs) |
622 |
r.release() |
623 |
|
624 |
def del_container_meta(self, metakey): |
625 |
r = self.container_post(update=True, metadata={metakey: ''}) |
626 |
r.release() |
627 |
|
628 |
def set_container_quota(self, quota): |
629 |
r = self.container_post(update=True, quota=quota) |
630 |
r.release() |
631 |
|
632 |
def set_container_versioning(self, versioning): |
633 |
r = self.container_post(update=True, versioning=versioning) |
634 |
r.release() |
635 |
|
636 |
def del_object(self, obj, until=None, delimiter=None): |
637 |
self.assert_container()
|
638 |
r = self.object_delete(obj, until=until, delimiter=delimiter)
|
639 |
r.release() |
640 |
|
641 |
def set_object_meta(self, object, metapairs): |
642 |
assert(type(metapairs) is dict) |
643 |
r = self.object_post(object, update=True, metadata=metapairs) |
644 |
r.release() |
645 |
|
646 |
def del_object_meta(self, metakey, object): |
647 |
r = self.object_post(object, update=True, metadata={metakey: ''}) |
648 |
r.release() |
649 |
|
650 |
def publish_object(self, object): |
651 |
r = self.object_post(object, update=True, public=True) |
652 |
r.release() |
653 |
|
654 |
def unpublish_object(self, object): |
655 |
r = self.object_post(object, update=True, public=False) |
656 |
r.release() |
657 |
|
658 |
def get_object_info(self, obj, version=None): |
659 |
r = self.object_head(obj, version=version)
|
660 |
return r.headers
|
661 |
|
662 |
def get_object_meta(self, obj, version=None): |
663 |
return filter_in(self.get_object_info(obj, version=version), |
664 |
'X-Object-Meta')
|
665 |
|
666 |
def get_object_sharing(self, object): |
667 |
r = filter_in(self.get_object_info(object), |
668 |
'X-Object-Sharing',
|
669 |
exactMatch=True)
|
670 |
reply = {} |
671 |
if len(r) > 0: |
672 |
perms = r['x-object-sharing'].split(';') |
673 |
for perm in perms: |
674 |
try:
|
675 |
perm.index('=')
|
676 |
except ValueError: |
677 |
raise ClientError('Incorrect reply format') |
678 |
(key, val) = perm.strip().split('=')
|
679 |
reply[key] = val |
680 |
return reply
|
681 |
|
682 |
def set_object_sharing(self, object, |
683 |
read_permition=False,
|
684 |
write_permition=False):
|
685 |
"""Give read/write permisions to an object.
|
686 |
@param object is the object to change sharing permissions
|
687 |
onto
|
688 |
@param read_permition is a list of users and user groups that
|
689 |
get read permition for this object
|
690 |
False means all previous read permissions
|
691 |
will be removed
|
692 |
@param write_perimition is a list of users and user groups to
|
693 |
get write permition for this object
|
694 |
False means all previous read permissions
|
695 |
will be removed
|
696 |
"""
|
697 |
perms = dict(read='' if not read_permition else read_permition, |
698 |
write='' if not write_permition else write_permition) |
699 |
r = self.object_post(object, update=True, permissions=perms) |
700 |
r.release() |
701 |
|
702 |
def del_object_sharing(self, object): |
703 |
self.set_object_sharing(object) |
704 |
|
705 |
def append_object(self, object, source_file, upload_cb=None): |
706 |
"""@param upload_db is a generator for showing progress of upload
|
707 |
to caller application, e.g. a progress bar. Its next is called
|
708 |
whenever a block is uploaded
|
709 |
"""
|
710 |
self.assert_container()
|
711 |
meta = self.get_container_info()
|
712 |
blocksize = int(meta['x-container-block-size']) |
713 |
filesize = fstat(source_file.fileno()).st_size |
714 |
nblocks = 1 + (filesize - 1) // blocksize |
715 |
offset = 0
|
716 |
if upload_cb is not None: |
717 |
upload_gen = upload_cb(nblocks) |
718 |
for i in range(nblocks): |
719 |
block = source_file.read(min(blocksize, filesize - offset))
|
720 |
offset += len(block)
|
721 |
r = self.object_post(object, |
722 |
update=True,
|
723 |
content_range='bytes */*',
|
724 |
content_type='application/octet-stream',
|
725 |
content_length=len(block),
|
726 |
data=block) |
727 |
r.release() |
728 |
|
729 |
if upload_cb is not None: |
730 |
upload_gen.next() |
731 |
|
732 |
def truncate_object(self, object, upto_bytes): |
733 |
r = self.object_post(object, |
734 |
update=True,
|
735 |
content_range='bytes 0-%s/*' % upto_bytes,
|
736 |
content_type='application/octet-stream',
|
737 |
object_bytes=upto_bytes, |
738 |
source_object=path4url(self.container, object)) |
739 |
r.release() |
740 |
|
741 |
def overwrite_object(self, |
742 |
object,
|
743 |
start, |
744 |
end, |
745 |
source_file, |
746 |
upload_cb=None):
|
747 |
"""Overwrite a part of an object with given source file
|
748 |
@start the part of the remote object to start overwriting from,
|
749 |
in bytes
|
750 |
@end the part of the remote object to stop overwriting to, in bytes
|
751 |
"""
|
752 |
self.assert_container()
|
753 |
meta = self.get_container_info()
|
754 |
blocksize = int(meta['x-container-block-size']) |
755 |
filesize = fstat(source_file.fileno()).st_size |
756 |
datasize = int(end) - int(start) + 1 |
757 |
nblocks = 1 + (datasize - 1) // blocksize |
758 |
offset = 0
|
759 |
if upload_cb is not None: |
760 |
upload_gen = upload_cb(nblocks) |
761 |
for i in range(nblocks): |
762 |
block = source_file.read(min(blocksize,
|
763 |
filesize - offset, |
764 |
datasize - offset)) |
765 |
offset += len(block)
|
766 |
r = self.object_post(object, |
767 |
update=True,
|
768 |
content_type='application/octet-stream',
|
769 |
content_length=len(block),
|
770 |
content_range='bytes %s-%s/*' % (start, end),
|
771 |
data=block) |
772 |
r.release() |
773 |
|
774 |
if upload_cb is not None: |
775 |
upload_gen.next() |
776 |
|
777 |
def copy_object(self, src_container, src_object, dst_container, |
778 |
dst_object=False,
|
779 |
source_version=None,
|
780 |
public=False,
|
781 |
content_type=None,
|
782 |
delimiter=None):
|
783 |
self.assert_account()
|
784 |
self.container = dst_container
|
785 |
dst_object = dst_object or src_object
|
786 |
src_path = path4url(src_container, src_object) |
787 |
r = self.object_put(dst_object,
|
788 |
success=201,
|
789 |
copy_from=src_path, |
790 |
content_length=0,
|
791 |
source_version=source_version, |
792 |
public=public, |
793 |
content_type=content_type, |
794 |
delimiter=delimiter) |
795 |
r.release() |
796 |
|
797 |
def move_object(self, src_container, src_object, dst_container, |
798 |
dst_object=False,
|
799 |
source_version=None,
|
800 |
public=False,
|
801 |
content_type=None,
|
802 |
delimiter=None):
|
803 |
self.assert_account()
|
804 |
self.container = dst_container
|
805 |
dst_object = dst_object or src_object
|
806 |
src_path = path4url(src_container, src_object) |
807 |
r = self.object_put(dst_object,
|
808 |
success=201,
|
809 |
move_from=src_path, |
810 |
content_length=0,
|
811 |
source_version=source_version, |
812 |
public=public, |
813 |
content_type=content_type, |
814 |
delimiter=delimiter) |
815 |
r.release() |
816 |
|
817 |
def get_sharing_accounts(self, limit=None, marker=None, *args, **kwargs): |
818 |
"""Get accounts that share with self.account"""
|
819 |
self.assert_account()
|
820 |
|
821 |
self.set_param('format', 'json') |
822 |
self.set_param('limit', limit, iff=limit is not None) |
823 |
self.set_param('marker', marker, iff=marker is not None) |
824 |
|
825 |
path = ''
|
826 |
success = kwargs.pop('success', (200, 204)) |
827 |
r = self.get(path, *args, success=success, **kwargs)
|
828 |
return r.json
|
829 |
|
830 |
def get_object_versionlist(self, path): |
831 |
self.assert_container()
|
832 |
r = self.object_get(path, format='json', version='list') |
833 |
return r.json['versions'] |