How to fetch Salesforce Attachment file content with django-salesforce?

I’m developing a Django 1.11 app serving as a UI for some Salesforce Objects using django-salesforce for the communication with Salesforce.

I have to give users the option to download files from Salesforce Attachment objects related to their Contact.

Django Attachment model on my_app/

class Attachment(models.Model):
parent = models.ForeignKey(Contact, models.DO_NOTHING,
name = models.CharField(max_length=255, verbose_name=‘File Name’)
content_type = models.CharField(max_length=120, blank=True, null=True)
body_length = models.IntegerField(sf_read_only=models.READ_ONLY)
body = models.TextField()

On this Attachment model I can access the rest URL for the file content on the body field, but not the actual content.

Is there a way of getting file content from the Attachment without having to implement an OAuth client just for this?