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https://github.com/peopledoc/multipart-reader

Multipart/* reader extracted from awsome `aiohttp` project, cf.: http://aiohttp.readthedocs.org/en/stable/multipart.html.
https://github.com/peopledoc/multipart-reader

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Multipart/* reader extracted from awsome `aiohttp` project, cf.: http://aiohttp.readthedocs.org/en/stable/multipart.html.

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================
Multipart Reader
================

.. image:: https://travis-ci.org/novafloss/multipart-reader.svg
:target: https://travis-ci.org/novafloss/multipart-reader
:alt: We are under CI!!

Permits to read a multipart content like, mixed, related, etc.

Thanks to the *aiohttp* project for the implementation, cf.:
http://aiohttp.readthedocs.org/en/stable/multipart.html. Unfortunately lot of
people have not yet moved to asyncio, or do not want the full *aiohttp* stack
to read the multipart content.

Here we tried to keep all the *aiohttp* logic and coverage but the coroutines
mechanism.

What it does
============

It reads the same way multpart/x contents. Lets say we have the following
*multipart/related* content::

>>> import json

>>> from email.mime.multipart import MIMEMultipart
>>> from email.mime.base import MIMEBase

>>> multipart = MIMEMultipart('related')

>>> part = MIMEBase('application', 'json')
>>> part.set_payload(json.dumps({'foo': 'bar'}))
>>> multipart.attach(part)

>>> part = MIMEBase('application', 'octet-stream')
>>> part.set_payload(b"Python will save the world. I don't know how. But it will.")
>>> part.add_header('Content-Disposition', 'attachment', filename='python-save-the-world.txt')
>>> multipart.attach(part)

Here is how we can read it::

>>> import io

>>> from multipart_reader import MultipartReader

>>> content = multipart.as_string().split('\n\n', 1)[1]
>>> headers = dict(multipart.items())

>>> stream = io.BytesIO()
>>> stream.write(content)
>>> stream.seek(0)

>>> reader = MultipartReader(headers, stream)

>>> json_part = reader.next()
>>> json_part.json()
{'foo': 'bar'}

>>> file_part = reader.next()
>>> file_part.read()
"Python will save the world. I don't know how. But it will."

>>> file_part.filename
'python-save-the-world.txt'

That's it ...