requests with msgpack

app.py

import msgpack
from flask import Flask, request, jsonify
from flask.wrappers import Request


class RequestWithMsgPackSupport(Request):

    @property
    def is_msgpack(self):
        return self.mimetype == 'application/msgpack'

    def get_msgpack(self):
        if not self.is_msgpack:
            return None
        try:
            return msgpack.unpackb(self.get_data(), encoding='utf-8')
        except msgpack.exceptions.UnpackException:
            return None


def prepare_resp(obj):
    msgpack_type = 'application/msgpack'
    if request.headers.get('accept', None) == msgpack_type:
        return app.response_class(
            msgpack.packb(obj),
            mimetype=msgpack_type
        )
    return jsonify(obj)


app = Flask(__name__)
app.request_class = RequestWithMsgPackSupport


@app.route('/', methods=['POST'])
def index():
    data = request.get_msgpack()
    return prepare_resp(data)


if __name__ == '__main__':
    app.debug = True
    app.run()

post.py

import requests

url = 'http://127.0.0.1:5000'
data = {'title': 'Pale Blue Dot', 'author': 'Carl Sagan'}

resp = requests.post(
    url,
    data=msgpack.packb(data),
    headers={
        'Content-type': 'application/msgpack',
        'Accept': 'application/msgpack'
    }
)

print msgpack.unpackb(resp.content)


resp = requests.post(
    url,
    data=msgpack.packb(data),
    headers={
        'Content-type': 'application/msgpack',
    }
)

print resp.json()

reference Msgpack in Flask-RESTful | Kendrick Tan