How to receive an POST request from Django Rest Framework?

Question

I build a API usign Django 2 and Django Rest Framework. All get methods are ok, using authentication first to receive a token and using this token to access all the other methods. The only problem is with the only function that I have that receive a POST data.

The problem is that the call for this POST method allways return, even providing the "authorization" token, this message:

"{"detail":"Authentication credentials were not provided."}

The funy thing is that in POSTMAN it works! Another developer tried with JavaScript and it allways return this message. I tried with PHP making a POST request using CURL and give the same error. Just with POSTMAN it works...

This is my Django Rest Framework settings in settings.py:

INSTALLED_APPS = [ ... 'rest_framework.authtoken', ... ] REST_FRAMEWORK = { 'DEFAULT_PERMISSION_CLASSES': ( 'rest_framework.permissions.IsAuthenticated', ), 'DEFAULT_AUTHENTICATION_CLASSES': ( 'rest_framework.authentication.TokenAuthentication', ), }

This is the method called trought API, in views.py:

@api_view(['POST']) def api_inventory_sector_items_check(request, branch_id, inventory_id, sector_id): # Do something

This is the url.py:

# ... from rest_framework.urlpatterns import format_suffix_patterns # ... urlpatterns = [ ... path('.../check', # See the long URL bellow views.api_inventory_sector_items_check, name='app.api.inventory_sector_items_check'), ] # ...

So I'm trying to call using POST:

{{domain}}/app/api/v1/branches/1/inventories/2/sectors/100101329/items/check

'Content-Type: application/json'

'Authorization: Token Token efad3303547374b7c035499218ad5d0cceb03178'

And in the body posting some data...

As I told before, using POSTMAN all it's ok. But when we try to submit this post by any other 'method', it returns the same message. Detail: with the same HEADER, but for GET requests, all works.

Follow a example of request using PHP that returns "... credentials were not provided".

<?php $data = array( "data"=>"{'id':'20012738', 'obs': '', 'resp':'325880','final':1}", ); $data_string = json_encode($data); $ch = curl_init('http://localhost/app/api/v1/branches/1/ inventories/7/sectors/100162162/items/check'); curl_setopt($ch, CURLOPT_CUSTOMREQUEST, "POST"); curl_setopt($ch, CURLOPT_POSTFIELDS, $data_string); curl_setopt($ch, CURLOPT_RETURNTRANSFER, true); curl_setopt($ch, CURLOPT_HTTPHEADER, array( 'Content-Type: application/json', 'Content-Length: ' . strlen($data_string)), 'Authorization: Token efad3303547374b7c035499218ad5d0cceb03178' ); $result = curl_exec($ch); echo $result; ?>

Someone can help me? Thank you very much!

Will Keeling · Accepted Answer · 2018-04-13 12:04:19Z

You have a subtle typo in:

curl_setopt($ch, CURLOPT_HTTPHEADER, array( 'Content-Type: application/json', 'Content-Length: ' . strlen($data_string)), 'Authorization: Token efad3303547374b7c035499218ad5d0cceb03178' );

The array() ends before the Authorization header is added (note the closing parenthesis at the end of the content-length header). That will prevent the token from being transmitted correctly, and will likely cause the authentication error.

Change to:

curl_setopt($ch, CURLOPT_HTTPHEADER, array( 'Content-Type: application/json', 'Content-Length: ' . strlen($data_string), 'Authorization: Token efad3303547374b7c035499218ad5d0cceb03178') );

Hello, thank you very much. Now token problem it's solved. By bad!
@WilliamZimmermann If this answer solved your problem, accept it by clicking the checkmark on the left side of the answer :)

William Zimmermann · Accepted Answer · 2018-04-13 16:24:43Z

My PHP code to submit was wrong and Will Kelling help me. Thank you. Anyway, to submit POST data for Django Rest API was retourning no data... I solved this problem by use:

request.body

instead

request.POST.get('data')

Then, my code become like this:

@api_view(['POST']) def api_inventory_sector_items_check(request, branch_id, inventory_id, sector_id): try: sector_items = request.body except Exception: return Response({"detail": "No data received or isn't a JSON data"}, status=status.HTTP_406_NOT_ACCEPTABLE) try: sector_items = json.loads(sector_items) except json.JSONDecodeError or TypeError: return Response({ 'detail': "Data received has a wrong format. This is not a JSON var." }, status=status.HTTP_404_BAD_REQUEST)

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