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37 from . import ClientError
38 from .storage import StorageClient
41 class PithosClient(StorageClient):
42 """GRNet Pithos API client"""
44 def put_block(self, data, hash):
45 path = '/%s/%s?update' % (self.account, self.container)
46 headers = {'Content-Type': 'application/octet-stream',
47 'Content-Length': len(data)}
48 resp, reply = self.raw_http_cmd('POST', path, data, headers,
50 assert reply.strip() == hash, 'Local hash does not match server'
52 def create_object(self, object, f):
53 meta = self.get_container_meta()
54 blocksize = int(meta['block-size'])
55 blockhash = meta['block-hash']
59 data = f.read(blocksize)
62 h = hashlib.new(blockhash)
63 h.update(data.rstrip('\x00'))
65 hashes[hash] = (size, bytes)
67 data = f.read(blocksize)
69 path = '/%s/%s/%s?hashmap&format=json' % (self.account, self.container,
71 hashmap = dict(bytes=size, hashes=hashes)
72 req = json.dumps(hashmap)
73 resp, reply = self.raw_http_cmd('PUT', path, req, success=None)
75 if resp.status not in (201, 409):
76 raise ClientError('Invalid response from the server')
78 if resp.status == 201:
81 missing = json.loads(reply)
84 offset, bytes = hashes[hash]
87 self.put_block(data, hash)
89 self.http_put(path, req, success=201)