How to generate presigned S3 urls using django-storages?

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I have a Django form which saves a file to s3 through the django-storages library and works fine. How can I generate and return a pre-signed url so the user can access the file temporarily after it is uploaded ? Is this abstracted by django-storages or do I have to use the boto3 api?

I have spent hours going through the Django-storages documentation however it is not very clear how to do this ..

form.py

class DocumentForm(forms.Form):
    docfile = forms.FileField(
        label='Select a file',
        help_text='max. 42 megabytes'
    )
   name = models.CharField(max_length=20)
   uploaded_at = models.DateTimeField(auto_now_add=True)

views.py

def upload_file(request):
   if request.method == 'POST:
      form = DocumentForm(request.POST)
      if form.is_valid():
         form.save()
         url = #generate pre-signed url of uploaded file here
         return render(request, 'upload_response.html', url)

2 Answers

Here is sample code for generating pre-signed url for object in S3

import boto3

client = boto3.client('s3')
response = client.generate_presigned_url('get_object',Params={'Bucket': bucket_name,
                                                              'Key': objectpath},
                                         HttpMethod="GET", ExpiresIn=expires_in)
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