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#!/usr/bin/env python3
# -*- coding: utf-8 eval: (blacken-mode 1) -*-
# SPDX-License-Identifier: MIT
#
# February 22 2022, Christian Hopps <chopps@labn.net>
#
# Copyright (c) 2022, LabN Consulting, L.L.C.
import argparse
import logging
import os
import sys
import tempfile
import pytest
CWD = os.path.dirname(os.path.realpath(__file__))
try:
# Make sure we don't run-into ourselves in parallel operating environment
tmpdir = tempfile.mkdtemp(prefix="grpc-client-")
# This is painful but works if you have installed grpc and grpc_tools would be *way*
# better if we actually built and installed these but ... python packaging.
try:
import grpc_tools
from munet.base import commander
import grpc
commander.cmd_raises(f"cp {CWD}/../../../grpc/frr-northbound.proto .")
commander.cmd_raises(
"python3 -m grpc_tools.protoc"
f" --python_out={tmpdir} --grpc_python_out={tmpdir}"
f" -I {CWD}/../../../grpc frr-northbound.proto"
)
except Exception as error:
logging.error("can't create proto definition modules %s", error)
raise
try:
sys.path[0:0] = [tmpdir]
print(sys.path)
import frr_northbound_pb2
import frr_northbound_pb2_grpc
sys.path = sys.path[1:]
except Exception as error:
logging.error("can't import proto definition modules %s", error)
raise
finally:
commander.cmd_nostatus(f"rm -rf {tmpdir}")
class GRPCClient:
def __init__(self, server, port):
self.channel = grpc.insecure_channel("{}:{}".format(server, port))
self.stub = frr_northbound_pb2_grpc.NorthboundStub(self.channel)
def get_capabilities(self):
request = frr_northbound_pb2.GetCapabilitiesRequest()
response = "NONE"
try:
response = self.stub.GetCapabilities(request)
except Exception as error:
logging.error("Got exception from stub: %s", error)
logging.debug("GRPC Capabilities: %s", response)
return response
def get(self, xpath, encoding, gtype):
request = frr_northbound_pb2.GetRequest()
request.path.append(xpath)
request.type = gtype
request.encoding = encoding
result = ""
for r in self.stub.Get(request):
logging.debug('GRPC Get path: "%s" value: %s', request.path, r)
result += str(r.data.data)
return result
def next_action(action_list=None):
"Get next action from list or STDIN"
if action_list:
for action in action_list:
yield action
else:
while True:
try:
action = input("")
if not action:
break
yield action.strip()
except EOFError:
break
def main(*args):
parser = argparse.ArgumentParser(description="gRPC Client")
parser.add_argument(
"-s", "--server", default="localhost", help="gRPC Server Address"
)
parser.add_argument(
"-p", "--port", type=int, default=50051, help="gRPC Server TCP Port"
)
parser.add_argument("-v", "--verbose", action="store_true", help="be verbose")
parser.add_argument("--check", action="store_true", help="check runable")
parser.add_argument("--xml", action="store_true", help="encode XML instead of JSON")
parser.add_argument("actions", nargs="*", help="GETCAP|GET,xpath")
args = parser.parse_args(*args)
level = logging.DEBUG if args.verbose else logging.INFO
logging.basicConfig(
level=level,
format="%(asctime)s %(levelname)s: GRPC-CLI-CLIENT: %(name)s %(message)s",
)
if args.check:
sys.exit(0)
encoding = frr_northbound_pb2.XML if args.xml else frr_northbound_pb2.JSON
c = GRPCClient(args.server, args.port)
for action in next_action(args.actions):
action = action.casefold()
logging.debug("GOT ACTION: %s", action)
if action == "getcap":
caps = c.get_capabilities()
print(caps)
elif action.startswith("get,"):
# Get and print config and state
_, xpath = action.split(",", 1)
logging.debug("Get XPath: %s", xpath)
print(c.get(xpath, encoding, gtype=frr_northbound_pb2.GetRequest.ALL))
elif action.startswith("get-config,"):
# Get and print config
_, xpath = action.split(",", 1)
logging.debug("Get Config XPath: %s", xpath)
print(c.get(xpath, encoding, gtype=frr_northbound_pb2.GetRequest.CONFIG))
# for _ in range(0, 1):
elif action.startswith("get-state,"):
# Get and print state
_, xpath = action.split(",", 1)
logging.debug("Get State XPath: %s", xpath)
print(c.get(xpath, encoding, gtype=frr_northbound_pb2.GetRequest.STATE))
# for _ in range(0, 1):
if __name__ == "__main__":
main()
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