Unsupported Media Type, Backend, Please Guide Me

I am trying to receive a pdf file by using falcon framework as Backend. I am a beginner at backend and trying to understand what is happening. So summary, there are 2 classes. one

Solution 1:

Falcon has out of the box support for requests with Content-Type: application/json.

For other content types, you need to provide a media handler for your request.

Here is an attempt at implementing a handler for requests of Content-Type: application/pdf.

import cStringIO
import mimetypes
import uuid
import os

import falcon
from falcon import media
from pdfminer.pdfparser import PDFParser
from pdfminer.pdfdocument import PDFDocument

classDocument(object):
    def__init__(self, document):
        self.document = document
    # implement media methods hereclassPDFHandler(media.BaseHandler):
    defserialize(self, media):
        return media._parser.fp.getvalue()

    defdeserialize(self, raw):
        fp = cStringIO.StringIO()
        fp.write(raw)
        try:
            return Document(
                PDFDocument(
                    PDFParser(fp)
                )
            )
        except ValueError as err:
            raise errors.HTTPBadRequest(
                'Invalid PDF',
                'Could not parse PDF body - {0}'.format(err)
            )

Update media handlers to support Content-Type: application/pdf.

extra_handlers = {
    'application/pdf': PDFHandler(),
}

app = falcon.API()
app.req_options.media_handlers.update(extra_handlers)
app.resp_options.media_handlers.update(extra_handlers)