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#!/usr/bin/env python
# encoding: utf8
#
# Copyright © Burak Arslan <burak at arskom dot com dot tr>,
# Arskom Ltd. http://www.arskom.com.tr
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are met:
#
# 1. Redistributions of source code must retain the above copyright notice,
# this list of conditions and the following disclaimer.
# 2. Redistributions in binary form must reproduce the above copyright
# notice, this list of conditions and the following disclaimer in the
# documentation and/or other materials provided with the distribution.
# 3. Neither the name of the owner nor the names of its contributors may be
# used to endorse or promote products derived from this software without
# specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
# DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE FOR ANY DIRECT,
# INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
# BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
# OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
# NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
# EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#
"""
Raw socket client example for MessagePackDocument via MessagePack server.
"""
from __future__ import print_function, absolute_import
# These are analogues from spyne.server.msgpack. What's IN_REQUEST there is
# OUT_REQUEST here because an outgoing request from a client's perspective is an
# incoming request from a server's perspective.
IN_RESPONSE_NO_ERROR = 0
IN_RESPONSE_CLIENT_ERROR = 1
IN_RESPONSE_SERVER_ERROR = 2
OUT_REQUEST = 1
import socket
import msgpack
from spyne.util.six import BytesIO
s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
s.connect(("localhost", 5550))
request_document = {"say_hello": ["Dave", 5]}
# Because the server's input protocol is MessagePackDocument, we serialize the
# request document to msgpack bytestream.
request_bytestream = msgpack.packb(request_document)
# Because our server side transport is msgpack, we put the request bytestream
# inside another MessagePack document.
request_wrapper_document = [OUT_REQUEST, request_bytestream]
# and we serialize the request wrapper document to msgpack bytestream as well
request_wrapper_bytestream = msgpack.packb(request_wrapper_document)
# Some numbers to show how efficient this is:
print("Raw message length:", len(request_bytestream))
print("Wrapped message length:", len(request_wrapper_bytestream))
print("Overhead:", len(request_wrapper_bytestream) - len(request_bytestream),
"byte(s).")
# which we push to the socket.
s.sendall(request_wrapper_bytestream)
# This is straight from Python example in msgpack.org
in_buffer = msgpack.Unpacker()
while True:
# We wait for the full message to arrive.
in_buffer.feed(s.recv(1))
# Again, straight from the Python example in MessagePack homepage.
for msg in in_buffer:
print("Raw response document:", msg)
# There should be only one entry in the response dict. We ignore the
# rest here but we could whine about invalid response just as well.
resp_code, data = iter(msg.items()).next()
# We finally parse the response. We should probably do a dict lookup
# here.
if resp_code == IN_RESPONSE_NO_ERROR:
print("Success. Response: ", msgpack.unpackb(data))
# now that we have the response in a structured format, we could
# further deserialize it to a Python object, depending on our needs.
elif resp_code == IN_RESPONSE_CLIENT_ERROR:
print("Invalid Request. Details: ", msgpack.unpackb(data))
elif resp_code == IN_RESPONSE_SERVER_ERROR:
print("Internal Error. Details: ", msgpack.unpackb(data))
else:
print("Unknown response. Update the client. Additional data:", data)
# As we only sent one request, we must break after
# receiving its response.
break
else:
continue
break # break after receiving one message. See above for why.
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