Oh, nevermind. Instructions are attached to the ticket. I'll start to work on 
this.

> On 27 Dec 2016, at 06:33, roboslone <robosl...@gmail.com> wrote:
> 
> So how can I help resolve this? Should I just fork Django on GitHub and make 
> a pull-request?
> 
>> On 26 Dec 2016, at 15:45, Curtis Maloney <cur...@tinbrain.net 
>> <mailto:cur...@tinbrain.net>> wrote:
>> 
>> From what I can see in the rfc, it is permitted but not required.
>> 
>> Only a body in a 204 response is proscribed.
>> 
>> Any metadata (I.e. headers) are about the resource just accessed... So a 
>> Content-Type would, IMHO, be acceptable but not essential.
>> 
>> 
>> 
>> On 26 December 2016 9:47:02 PM AEDT, roboslone <robosl...@gmail.com 
>> <mailto:robosl...@gmail.com>> wrote:
>> Thanks, that was an old setting in Mail.app =/
>> 
>> I've made a pull-request to DRF: 
>> https://github.com/tomchristie/django-rest-framework/pull/4768 
>> <https://github.com/tomchristie/django-rest-framework/pull/4768>
>> But it seems to me that fixing it in Django would be more appropriate.
>> 
>> On the subject of Content-Type header with no response body, seems there's 
>> no convention about it, I've found different opinions on the web. The only 
>> thing I'm sure about is that putting None in that header is a bad idea.
>> 
>>> On 26 Dec 2016, at 13:24, Adam Johnson <m...@adamj.eu 
>>> <mailto:m...@adamj.eu>> wrote:
>>> 
>>> Hi GMail! (you might want to fix your name used on google groups, I had the 
>>> same problem ;) )
>>> 
>>> This seems to be a legitimate bug in the __repr__ to me - SO informs me 
>>> that DRF is correct in not defining a Content-Type for a 204 as it has no 
>>> body: 
>>> https://stackoverflow.com/questions/21029351/what-content-type-should-a-204-no-response-use
>>>  
>>> <https://stackoverflow.com/questions/21029351/what-content-type-should-a-204-no-response-use>
>>> 
>>> I created a ticket: https://code.djangoproject.com/ticket/27640 
>>> <https://code.djangoproject.com/ticket/27640> . If you want to try fix it 
>>> there's a great contribution guide at 
>>> https://docs.djangoproject.com/en/dev/internals/contributing/ 
>>> <https://docs.djangoproject.com/en/dev/internals/contributing/> . I think 
>>> using str.format would be acceptable, but the dict subclass sounds more 
>>> complicated than just doing self.get('Content-Type', '') :)
>>> 
>>> On 26 December 2016 at 05:57, GMail <robosl...@gmail.com 
>>> <mailto:robosl...@gmail.com>> wrote:
>>> Hi! I'm using Django 1.10.2 and Django-Rest-Framework 3.5.3.
>>> I noticed, that HttpRequest.__repr__ method relies on 'Content-Type' header:
>>> 
>>> 
>>> > class HttpResponse(HttpResponseBase):
>>> >     ...
>>> >
>>> >     def __repr__(self):
>>> >         return '<%(cls)s status_code=%(status_code)d, 
>>> > "%(content_type)s">' % {
>>> >             'cls': self.__class__.__name__,
>>> >             'status_code': self.status_code,
>>> >             'content_type': self['Content-Type'],
>>> >         }
>>> 
>>> 
>>> And after deleting an object in DRF sends empty response with HTTP204 and 
>>> no 'Content-Type' header. I was trying to log outgoing response and got 
>>> KeyError here.
>>> 
>>> So I have two questions:
>>> 1. Is this intentional? Do all responses in Django have 'Content-Type' 
>>> header and should DRF be aware of it?
>>> 2. Why not use `str.format` here? To avoid errors like this, `dict` 
>>> subclass with `__missing__` method could be used.
>>> 
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>>> 
>>> -- 
>>> Adam
>>> 
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>> 
>> 
>> 
>> -- 
>> Sent from my Android device with K-9 Mail. Please excuse my brevity.
> 

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