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38 from hashmap import HashMap
39 from binascii import hexlify, unhexlify
40 from cStringIO import StringIO
41 from client import Fault
44 def upload(client, path, container, prefix, name=None, mimetype=None):
46 meta = client.retrieve_container_metadata(container)
47 blocksize = int(meta['x-container-block-size'])
48 blockhash = meta['x-container-block-hash']
50 size = os.path.getsize(path)
51 hashes = HashMap(blocksize, blockhash)
52 hashes.load(open(path))
53 map = {'bytes': size, 'hashes': [hexlify(x) for x in hashes]}
55 objectname = name if name else os.path.split(path)[-1]
56 object = prefix + objectname
57 kwargs = {'mimetype':mimetype} if mimetype else {}
60 v = client.create_object_by_hashmap(container, object, map, **kwargs)
62 if fault.status != 409:
67 if type(fault.data) == types.StringType:
68 missing = json.loads(fault.data)
69 elif type(fault.data) == types.ListType:
73 del missing[missing.index(''):]
75 with open(path) as fp:
77 offset = hashes.index(unhexlify(hash)) * blocksize
79 block = fp.read(blocksize)
80 client.update_container_data(container, StringIO(block))
82 return client.create_object_by_hashmap(container, object, map, **kwargs)
84 def download(client, container, object, path):
86 res = client.retrieve_object_hashmap(container, object)
87 blocksize = int(res['block_size'])
88 blockhash = res['block_hash']
92 if os.path.exists(path):
93 h = HashMap(blocksize, blockhash)
95 hashes = [hexlify(x) for x in h]
97 open(path, 'w').close() # Create an empty file
100 with open(path, 'a+') as fp:
102 for i, h in enumerate(map):
103 if i < len(hashes) and h == hashes[i]:
105 start = i * blocksize
106 end = '' if i == len(map) - 1 else ((i + 1) * blocksize) - 1
107 data = client.retrieve_object(container, object, range='bytes=%s-%s' % (start, end))
108 if i != len(map) - 1:
109 data += (blocksize - len(data)) * '\x00'