[feature] client implementation for upstream

-- Resolves #8773

src/leap/soledad/client/_db/blobs/__init__.py

@@ -41,6 +41,7 @@ from leap.soledad.client._crypto import InvalidBlob
 from leap.soledad.client._crypto import BlobEncryptor
 from leap.soledad.client._crypto import BlobDecryptor
 from leap.soledad.client._crypto import EncryptionSchemeNotImplementedException
+from leap.soledad.client._crypto import get_unarmored_ciphertext_size
 from leap.soledad.client._http import HTTPClient
 from leap.soledad.client._pipes import TruncatedTailPipe
 from leap.soledad.client._pipes import PreamblePipe
@@ -495,6 +496,29 @@ class BlobManager(BlobsSynchronizer):
         yield defer.gatherResults(deferreds, consumeErrors=True)
         buf.close()
 
+    @defer.inlineCallbacks
+    def _upstream(self, blobs_id_list, namespace=''):
+        uri = urljoin(self.remote_stream, self.user)
+        params = {'namespace': namespace} if namespace else None
+        sizes = yield self.local.get_size_list(blobs_id_list, namespace)
+        convert = get_unarmored_ciphertext_size
+        sizes = map(lambda (x, y): (x, convert(y)), sizes)
+        data = BytesIO()  # TODO: stream from db
+        data.write(json.dumps(sizes) + '\n')
+        for blob_id in blobs_id_list:
+            blob_fd = yield self.local.get(blob_id, namespace=namespace)
+            doc_info = DocInfo(blob_id, FIXED_REV)
+            crypter = BlobEncryptor(doc_info, blob_fd, secret=self.secret,
+                                    armor=False)
+            fd = yield crypter.encrypt()
+            data.write(fd.read())
+        data.seek(0)
+        params = {'namespace': namespace} if namespace else {}
+        params['direction'] = 'upload'
+        response = yield self._client.post(uri, data=data, params=params)
+        check_http_status(response.code, blob_id)
+        logger.info("Finished stream up: %s" % (blobs_id_list,))
+
     @defer.inlineCallbacks
     def _download_and_decrypt(self, blob_id, namespace=''):
         logger.info("Staring download of blob: %s" % blob_id)