How to use django-debug-toolbar for django-tastypie?

django-debug-toolbar needs its output to be html, but django-tastypie's default output format is json.

I tried sending http://localhost/api/v1/resource/?format=html but it says Sorry, not implemented yet. Please append "?format=json" to your URL

Even though this doc lists html as one of valid option, it says its on the TODO list.
http://django-tastypie.readthedocs.org/en/latest/serialization.html#to-html

How do I use debug toolbar to debug tastypie api calls?
(eg, I'd like to see how many sql queries are being run for api calls.. and so on)

Maybe I can call the api from django views but how?

Solution

Here is a middleware I wrote for similar purposes that wraps json in HTML for enabling the debug toolbar and also pretty prints it. Furthermore, it supports binary data. I'm not using tastypie, but I think it should work with that too.

# settings-dev.py
from django.http import HttpResponse
import json   

MIDDLEWARE_CLASSES += (
    'debug_toolbar.middleware.DebugToolbarMiddleware',
    'NonHtmlDebugToolbarMiddleware',
)

class NonHtmlDebugToolbarMiddleware(object):
    """
    The Django Debug Toolbar usually only works for views that return HTML.
    This middleware wraps any non-HTML response in HTML if the request
    has a 'debug' query parameter (e.g. http://localhost/foo?debug)
    Special handling for json (pretty printing) and
    binary data (only show data length)
    """

    @staticmethod
    def process_response(request, response):
        if request.GET.get('debug') == '':
            if response['Content-Type'] == 'application/octet-stream':
                new_content = '<html><body>Binary Data, ' \
                    'Length: {}</body></html>'.format(len(response.content))
                response = HttpResponse(new_content)
            elif response['Content-Type'] != 'text/html':
                content = response.content
                try:
                    json_ = json.loads(content)
                    content = json.dumps(json_, sort_keys=True, indent=2)
                except ValueError:
                    pass
                response = HttpResponse('<html><body><pre>{}'
                                        '</pre></body></html>'.format(content))

        return response