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Python module for RESTful HTTP Content Negotiation
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Add media type for MessagePack



mimerender is a Python module for RESTful HTTP Content Negotiation.

It acts as a decorator that wraps a HTTP request handler to select the correct render function for a given HTTP Accept header. It uses mimeparse to parse the accept string and select the best available representation.

Support for webapp2 (Google App Engine),, Flask and Bottle is available out of the box and it's easy to add support for your favourite framework, just extend the MimeRenderBase class.

Build status at Travis CI: Build Status

You can read the full documentation at

Example (Flask):

from flask import Flask
import json
import mimerender

mimerender = mimerender.FlaskMimeRender()

render_xml = lambda message: '<message>%s</message>'%message
render_json = lambda **args: json.dumps(args)
render_html = lambda message: '<html><body>%s</body></html>'%message
render_txt = lambda message: message

app = Flask(__name__)

    default = 'html',
    html = render_html,
    xml  = render_xml,
    json = render_json,
    txt  = render_txt
def greet(name='world'):
    return {'message': 'Hello, ' + name + '!'}

if __name__ == "__main__":

Then you can do:

$ curl -i -H "Accept: application/html" localhost:8080/x
$ curl -i -H "Accept: application/xml" localhost:8080/x
$ curl -i -H "Accept: application/json" localhost:8080/x
$ curl -i -H "Accept: text/plain" localhost:8080/x

and get results that make sense.

In the examples directory you will find examples for all the other supported frameworks.

How to get it

mimerender is in PyPI, so it's as easy as doing:

$ pip install mimerender
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