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#!/usr/bin/env python3
# -*- mode: python -*-
# -*- coding: utf-8 -*-
# Licensed to the Apache Software Foundation (ASF) under one
# or more contributor license agreements. See the NOTICE file
# distributed with this work for additional information
# regarding copyright ownership. The ASF licenses this file
# to you 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.
"""
Command-line tool
NOTE: The API for the command-line tool is experimental.
"""
import sys
import urllib
from BaseHTTPServer import HTTPServer, BaseHTTPRequestHandler
from avro import io
from avro import datafile
from avro import protocol
from avro import ipc
class GenericResponder(ipc.Responder):
def __init__(self, proto, msg, datum):
proto_json = file(proto, 'r').read()
ipc.Responder.__init__(self, protocol.Parse(proto_json))
self.msg = msg
self.datum = datum
def invoke(self, message, request):
if message.name == self.msg:
print >> sys.stderr, "Message: %s Datum: %s" % (message.name, self.datum)
# server will shut down after processing a single Avro request
global server_should_shutdown
server_should_shutdown = True
return self.datum
class GenericHandler(BaseHTTPRequestHandler):
def do_POST(self):
self.responder = responder
call_request_reader = ipc.FramedReader(self.rfile)
call_request = call_request_reader.read_framed_message()
resp_body = self.responder.respond(call_request)
self.send_response(200)
self.send_header('Content-Type', 'avro/binary')
self.end_headers()
resp_writer = ipc.FramedWriter(self.wfile)
resp_writer.write_framed_message(resp_body)
if server_should_shutdown:
print >> sys.stderr, "Shutting down server."
self.server.force_stop()
class StoppableHTTPServer(HTTPServer):
"""HTTPServer.shutdown added in Python 2.6. FML."""
stopped = False
allow_reuse_address = True
def __init__(self, *args, **kw):
HTTPServer.__init__(self, *args, **kw)
self.allow_reuse_address = True
def serve_forever(self):
while not self.stopped:
self.handle_request()
def force_stop(self):
self.server_close()
self.stopped = True
self.serve_forever()
def run_server(uri, proto, msg, datum):
url_obj = urllib.parse.urlparse(uri)
server_addr = (url_obj.hostname, url_obj.port)
global responder
global server_should_shutdown
server_should_shutdown = False
responder = GenericResponder(proto, msg, datum)
server = StoppableHTTPServer(server_addr, GenericHandler)
print("Port: %s" % server.server_port)
sys.stdout.flush()
server.allow_reuse_address = True
print >> sys.stderr, "Starting server."
server.serve_forever()
def send_message(uri, proto, msg, datum):
url_obj = urllib.parse.urlparse(uri)
client = ipc.HTTPTransceiver(url_obj.hostname, url_obj.port)
proto_json = file(proto, 'r').read()
requestor = ipc.Requestor(protocol.Parse(proto_json), client)
print(requestor.request(msg, datum))
def file_or_stdin(f):
if f == "-":
return sys.stdin
else:
return file(f)
def main(args=sys.argv):
if len(args) == 1:
print("Usage: %s [dump|rpcreceive|rpcsend]" % args[0])
return 1
if args[1] == "dump":
if len(args) != 3:
print("Usage: %s dump input_file" % args[0])
return 1
for d in datafile.DataFileReader(file_or_stdin(args[2]), io.DatumReader()):
print(repr(d))
elif args[1] == "rpcreceive":
usage_str = "Usage: %s rpcreceive uri protocol_file " % args[0]
usage_str += "message_name (-data d | -file f)"
if len(args) not in [5, 7]:
print(usage_str)
return 1
uri, proto, msg = args[2:5]
datum = None
if len(args) > 5:
if args[5] == "-file":
reader = open(args[6], 'rb')
datum_reader = io.DatumReader()
dfr = datafile.DataFileReader(reader, datum_reader)
datum = dfr.next()
elif args[5] == "-data":
print("JSON Decoder not yet implemented.")
return 1
else:
print(usage_str)
return 1
run_server(uri, proto, msg, datum)
elif args[1] == "rpcsend":
usage_str = "Usage: %s rpcsend uri protocol_file " % args[0]
usage_str += "message_name (-data d | -file f)"
if len(args) not in [5, 7]:
print(usage_str)
return 1
uri, proto, msg = args[2:5]
datum = None
if len(args) > 5:
if args[5] == "-file":
reader = open(args[6], 'rb')
datum_reader = io.DatumReader()
dfr = datafile.DataFileReader(reader, datum_reader)
datum = dfr.next()
elif args[5] == "-data":
print("JSON Decoder not yet implemented.")
return 1
else:
print(usage_str)
return 1
send_message(uri, proto, msg, datum)
return 0
if __name__ == "__main__":
sys.exit(main(sys.argv))
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