def _invoke_service(self, topic, payload, other_fields=None):
"""
Invokes a request method on the File Transfer DXL service.
:param str topic: The topic to send the request to.
:param payload: The payload to include in the request
:param dict other_fields: Other fields to include in the request
:return: Results of the service invocation.
:rtype: dict
"""
# Create the DXL request message.
request = Request(topic)
# Set the full request parameters.
request.payload = payload
request.other_fields = other_fields
# Perform a synchronous DXL request.
response = self._dxl_sync_request(request)
# Convert the JSON payload in the DXL response message to a Python
# dictionary and return it.
return MessageUtils.json_payload_to_dict(response)
# If all of the bytes in the local file have been read, this must
# be the last segment. Send a 'store' result, file 'name', and
# 'size' and sha256 'hash' values that the service can use to
# confirm that the full contents of the file were transmitted
# properly.
bytes_read += len(segment)
if bytes_read == file_size:
other_fields[FileStoreProp.NAME] = os.path.join(
STORE_FILE_DIR, os.path.basename(STORE_FILE_NAME))
other_fields[FileStoreProp.RESULT] = FileStoreResultProp.STORE
other_fields[FileStoreProp.SIZE] = str(file_size)
other_fields[FileStoreProp.HASH_SHA256] = file_hash.hexdigest()
# Set the full request parameters
req.other_fields = other_fields
req.payload = segment
# Send the file segment request to the DXL fabric. Exit if an
# error response is received.
res = client.sync_request(req, timeout=30)
if res.message_type == Message.MESSAGE_TYPE_ERROR:
print(
"\nError invoking service with topic '{}': {} ({})".format(
request_topic, res.error_message, res.error_code))
exit(1)
# Update the current percent complete on the console.
sys.stdout.write("\rPercent complete: {}%".format(
int((segment_number / total_segments) *
100) if total_segments else 100))
