any plan with 
https://github.com/django/deps/blob/master/draft/content-negotiation.rst 
one?

On Sunday, November 17, 2019 at 2:00:26 PM UTC+6, Adam Johnson wrote:
>
> Right - Flask's error message also points to something I was mistaken 
> about. XMLHttpRequest does not set this header. jQuery adds it ( 
> https://api.jquery.com/jquery.ajax/#jQuery-ajax-settings ), and 
> presumably some other JS libraries.
>
> In my opinion there are not many good reasons to have to change behaviour 
>> if a request is made via XHR. I think the most common usage is to have a 
>> single view that returns a JSON response or a HTML response depending on if 
>> XHR is used (
>> https://github.com/search?l=Python&q=request.is_ajax&type=Code), which 
>> isn’t great and isn’t reliable.
>>
>
> Riight too. A better way would be to check the Accept header. DRF does 
> this: https://www.django-rest-framework.org/api-guide/content-negotiation/ 
> . Django doesn't provide any tools at the moment for parsing Accept. We 
> could add an API like https://pypi.org/project/django-accept-header/ ?
>
> On Sat, 16 Nov 2019 at 16:16, Tom Forbes <t...@tomforb.es <javascript:>> 
> wrote:
>
>> I would agree. Flask has done the same:
>>
>> DeprecationWarning: Request.is_xhr is deprecated. Given that the 
>> X-Requested-With header is not a part of any spec, it is not reliable
>>
>> In my opinion there are not many good reasons to have to change behaviour 
>> if a request is made via XHR. I think the most common usage is to have a 
>> single view that returns a JSON response or a HTML response depending on if 
>> XHR is used (
>> https://github.com/search?l=Python&q=request.is_ajax&type=Code), which 
>> isn’t great and isn’t reliable.
>>
>>
>> On 16 Nov 2019, at 16:08, Adam Johnson <m...@adamj.eu <javascript:>> 
>> wrote:
>>
>> Django's HttpRequest.is_ajax method determines whether the request was 
>> made with the JS API XMLHttpRequest 
>> https://docs.djangoproject.com/en/2.2/ref/request-response/#django.http.HttpRequest.is_ajax
>>  
>> . It does so by checking the X-Requested-With header.
>>
>> The new way of making "AJAX" requests from the browser is the JavaScript 
>> fetch() API : https://developer.mozilla.org/en-US/docs/Web/API/Fetch_API 
>> .
>>
>> I think the  is_ajax() documentation is at least a little misleading in 
>> pretending XMLHttpRequest is the only JS API. There also aren't any special 
>> headers set by fetch() so it's not possible to detect its requests.
>>
>> I propose deprecating is_ajax() with no replacement.
>>
>> Thoughts?
>>
>> -- 
>> Adam
>>
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>
>
> -- 
> Adam
>

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