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+# Copyright (c) 2018 Cisco and/or its affiliates.
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at:
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+"""Python API executor library."""
+
+import binascii
+import json
+
+from paramiko.ssh_exception import SSHException
+from robot.api import logger
+
+from resources.libraries.python.constants import Constants
+from resources.libraries.python.PapiErrors import PapiInitError, \
+ PapiJsonFileError, PapiCommandError, PapiCommandInputError
+# TODO: from resources.libraries.python.PapiHistory import PapiHistory
+from resources.libraries.python.ssh import SSH, SSHTimeout
+
+__all__ = ['PapiExecutor']
+
+
+class PapiExecutor(object):
+ """Contains methods for executing Python API commands on DUTs."""
+
+ def __init__(self, node):
+ self._stdout = None
+ self._stderr = None
+ self._ret_code = None
+ self._node = node
+ self._json_data = None
+ self._api_reply = list()
+ self._api_data = None
+
+ self._ssh = SSH()
+ try:
+ self._ssh.connect(node)
+ except:
+ raise SSHException('Cannot open SSH connection to host {host} to '
+ 'execute PAPI command(s)'.
+ format(host=self._node['host']))
+
+ def __enter__(self):
+ return self
+
+ def __exit__(self, exc_type, exc_val, exc_tb):
+ pass
+
+ @staticmethod
+ def _process_api_data(api_d):
+ """Process API data for smooth converting to JSON string.
+
+ Apply binascii.hexlify() method for string values.
+
+ :param api_d: List of APIs with their arguments.
+ :type api_d: list
+ :returns: List of APIs with arguments pre-processed for JSON.
+ :rtype: list
+ """
+
+ api_data_processed = list()
+ for api in api_d:
+ api_name = api['api_name']
+ api_args = api['api_args']
+ api_processed = dict(api_name=api_name)
+ api_args_processed = dict()
+ for a_k, a_v in api_args.iteritems():
+ value = binascii.hexlify(a_v) if isinstance(a_v, str) else a_v
+ api_args_processed[str(a_k)] = value
+ api_processed['api_args'] = api_args_processed
+ api_data_processed.append(api_processed)
+ return api_data_processed
+
+ @staticmethod
+ def _revert_api_reply(api_r):
+ """Process API reply / a part of API reply.
+
+ Apply binascii.unhexlify() method for unicode values.
+
+ :param api_r: API reply.
+ :type api_r: dict
+ :returns: Processed API reply / a part of API reply.
+ :rtype: dict
+ """
+
+ reply_dict = dict()
+ reply_value = dict()
+ for reply_key, reply_v in api_r.iteritems():
+ for a_k, a_v in reply_v.iteritems():
+ value = binascii.unhexlify(a_v) if isinstance(a_v, unicode) \
+ else a_v
+ reply_value[a_k] = value
+ reply_dict[reply_key] = reply_value
+ return reply_dict
+
+ def _process_reply(self, api_reply):
+ """Process API reply.
+
+ :param api_reply: API reply.
+ :type api_reply: dict or list of dict
+ :returns: Processed API reply.
+ :rtype: list or dict
+ """
+
+ if isinstance(api_reply, list):
+ reverted_reply = list()
+ for a_r in api_reply:
+ reverted_reply.append(self._revert_api_reply(a_r))
+ else:
+ reverted_reply = self._revert_api_reply(api_reply)
+ return reverted_reply
+
+ def _process_json_data(self):
+ """Process received JSON data."""
+
+ for data in self._json_data:
+ api_name = data['api_name']
+ api_reply = data['api_reply']
+ api_reply_processed = dict(
+ api_name=api_name, api_reply=self._process_reply(api_reply))
+ self._api_reply.append(api_reply_processed)
+
+ def execute_papi(self, api_data, timeout=120):
+ """Execute PAPI command(s) on remote node and store the result.
+
+ :param api_data: List of APIs with their arguments.
+ :param timeout: Timeout in seconds.
+ :type api_data: list
+ :type timeout: int
+ :raises SSHTimeout: If PAPI command(s) execution is timed out.
+ :raises PapiInitError: If PAPI initialization failed.
+ :raises PapiJsonFileError: If no api.json file found.
+ :raises PapiCommandError: If PAPI command(s) execution failed.
+ :raises PapiCommandInputError: If invalid attribute name or invalid
+ value is used in API call.
+ :raises RuntimeError: If PAPI executor failed due to another reason.
+ """
+ self._api_data = api_data
+ api_data_processed = self._process_api_data(api_data)
+ json_data = json.dumps(api_data_processed)
+
+ cmd = "python {fw_dir}/{papi_provider} --json_data '{json}'".format(
+ fw_dir=Constants.REMOTE_FW_DIR,
+ papi_provider=Constants.RESOURCES_PAPI_PROVIDER,
+ json=json_data)
+
+ try:
+ ret_code, stdout, stderr = self._ssh.exec_command_sudo(
+ cmd=cmd, timeout=timeout)
+ except SSHTimeout:
+ logger.error('PAPI command(s) execution timeout on host {host}:'
+ '\n{apis}'.format(host=self._node['host'],
+ apis=self._api_data))
+ raise
+ except (PapiInitError, PapiJsonFileError, PapiCommandError,
+ PapiCommandInputError):
+ logger.error('PAPI command(s) execution failed on host {host}'.
+ format(host=self._node['host']))
+ raise
+ except:
+ raise RuntimeError('PAPI command(s) execution on host {host} '
+ 'failed: {apis}'.format(host=self._node['host'],
+ apis=self._api_data))
+
+ self._ret_code = ret_code
+ self._stdout = stdout
+ self._stderr = stderr
+
+ def papi_should_have_failed(self):
+ """Read return code from last executed script and raise exception if the
+ PAPI command(s) didn't fail.
+
+ :raises RuntimeError: When no PAPI command executed.
+ :raises AssertionError: If PAPI command(s) execution passed.
+ """
+
+ if self._ret_code is None:
+ raise RuntimeError("First execute the PAPI command(s)!")
+ if self._ret_code == 0:
+ raise AssertionError(
+ "PAPI command(s) execution passed, but failure was expected: "
+ "{apis}".format(apis=self._api_data))
+
+ def papi_should_have_passed(self):
+ """Read return code from last executed script and raise exception if the
+ PAPI command(s) failed.
+
+ :raises RuntimeError: When no PAPI command executed.
+ :raises AssertionError: If PAPI command(s) execution failed.
+ """
+
+ if self._ret_code is None:
+ raise RuntimeError("First execute the PAPI command(s)!")
+ if self._ret_code != 0:
+ raise AssertionError(
+ "PAPI command(s) execution failed, but success was expected: "
+ "{apis}".format(apis=self._api_data))
+
+ def get_papi_stdout(self):
+ """Returns value of stdout from last executed PAPI command(s)."""
+
+ return self._stdout
+
+ def get_papi_stderr(self):
+ """Returns value of stderr from last executed PAPI command(s)."""
+
+ return self._stderr
+
+ def get_papi_reply(self):
+ """Returns api reply from last executed PAPI command(s)."""
+
+ self._json_data = json.loads(self._stdout)
+ self._process_json_data()
+
+ return self._api_reply