text/plain media handler for Falcon

texthandler.py

import cgi
import functools

import falcon


class TextHandler(falcon.media.BaseHandler):
    DEFAULT_CHARSET = 'utf-8'

    @classmethod
    @functools.lru_cache
    def _get_charset(cls, content_type):
        _, params = cgi.parse_header(content_type)
        return params.get('charset') or cls.DEFAULT_CHARSET

    def deserialize(self, stream, content_type, content_length):
        data = stream.read()
        return data.decode(self._get_charset(content_type))

    def serialize(self, media, content_type):
        return media.encode(self._get_charset(content_type))


class MediaEcho:
    def on_post(self, req, resp):
        resp.content_type = req.accept
        resp.media = req.get_media()


app = falcon.App()
app.req_options.media_handlers['text/plain'] = TextHandler()
app.resp_options.media_handlers['text/plain'] = TextHandler()
app.add_route('/media', MediaEcho())

Not sure in the case you mean resp.text... Currently, setting resp.text does not imply any media type, it's fairly common to write

resp.text = json.dumps(data)  # Or YAML or CSV or whatever