Here's a class I created to integrate my site with amazon's storage service. I like this because in the admin interface it looks pretty much like a file field and you can just click to upload. In theory you could integrate it into any oldforms system. You can set a default bucket value for the entire system into your settings module or for specific fields. You can manually specify a key or let the class generate one for you. This hasn't been tested extensively, so I invite you to contribute any fixes right here on the page. Maybe the django gods will see fit to include this right into django. Call get_WHATEVER_url() on the object to get the public URL to view/download the given file. Currently if you change the content type in the object, that change doesn't take effect until the next time you upload a file. {{{ from amazon import S3 from django.conf import settings from django.db import models from mimetypes import guess_type from mx.DateTime import now from django.core import validators from django import oldforms from django.dispatch import dispatcher from django.utils.functional import curry from django.utils.translation import gettext_lazy from django.db.models import signals from PIL import Image from StringIO import StringIO import os conn = S3.AWSAuthConnection(settings.AWS_ACCESS_KEY_ID, settings.AWS_SECRET_ACCESS_KEY) generator = S3.QueryStringAuthGenerator(settings.AWS_ACCESS_KEY_ID, settings.AWS_SECRET_ACCESS_KEY) class S3FileField(models.FileField): def __init__(self, verbose_name=None, name=None, bucket='', is_image=False, **kwargs): models.FileField.__init__(self, verbose_name, name, upload_to="s3", **kwargs) self.bucket = bucket self.is_image = is_image def get_manipulator_fields(self, opts, manipulator, change, name_prefix='', rel=False, follow=True): field_list = models.Field.get_manipulator_fields(self, opts, manipulator, change, name_prefix, rel, follow) if not self.blank: if rel: # This validator makes sure FileFields work in a related context. class RequiredFileField(object): def __init__(self, other_field_names, other_file_field_name): self.other_field_names = other_field_names self.other_file_field_name = other_file_field_name self.always_test = True def __call__(self, field_data, all_data): if not all_data.get(self.other_file_field_name, False): c = validators.RequiredIfOtherFieldsGiven(self.other_field_names, gettext_lazy("This field is required.")) c(field_data, all_data) # First, get the core fields, if any. core_field_names = [] for f in opts.fields: if f.core and f != self: core_field_names.extend(f.get_manipulator_field_names(name_prefix)) # Now, if there are any, add the validator to this FormField. if core_field_names: field_list[0].validator_list.append(RequiredFileField(core_field_names, field_list[1].field_name)) else: v = validators.RequiredIfOtherFieldNotGiven(field_list[1].field_name, gettext_lazy("This field is required.")) v.always_test = True field_list[0].validator_list.append(v) field_list[0].is_required = field_list[1].is_required = False return field_list def get_internal_type(self): return "FileField" def contribute_to_class(self, cls, name): super(S3FileField, self).contribute_to_class(cls, name) models.CharField(maxlength=200, blank=self.blank, null=self.null).contribute_to_class(cls, "%s_key"%(self.name)) models.CharField(maxlength=200, blank=self.blank, null=self.null, default=settings.DEFAULT_BUCKET).contribute_to_class(cls, "%s_bucket"%(self.name)) models.CharField(maxlength=200, blank=True, null=True, default="").contribute_to_class(cls, "%s_content_type"%(self.name)) models.IntegerField(blank=True, null=True).contribute_to_class(cls, "%s_size"%(self.name)) if self.is_image: models.IntegerField(blank=True, null=True).contribute_to_class(cls, "%s_width"%(self.name)) models.IntegerField(blank=True, null=True).contribute_to_class(cls, "%s_height"%(self.name)) # Getter for the file url def get_url(instance, field): return field.get_url(instance) setattr(cls, 'get_%s_url' % self.name, curry(get_url, field=self)) dispatcher.connect(self.delete_file, signal=signals.post_delete, sender=cls) def delete_file(self, instance): if getattr(instance, self.attname): bucket = self.get_bucket(instance) key = self.get_key(instance) conn.delete(bucket, key) def get_url(self, instance): bucket = self.get_bucket(instance) key = self.get_key(instance) if bucket and key: url = generator.make_bare_url(bucket, key) return url return None def get_bucket(self, instance): return getattr(instance, "%s_bucket"%self.name) def set_bucket(self, instance, bucket): setattr(instance, "%s_bucket"%self.name, bucket) def get_key(self, instance): return getattr(instance, "%s_key"%self.name) def set_key(self, instance, key): setattr(instance, "%s_key"%self.name, key) def get_content_type(self, instance): return getattr(instance, "%s_content_type"%self.name) def set_content_type(self, instance, content_type): setattr(instance, "%s_content_type"%self.name, content_type) def get_size(self, instance): return getattr(instance, "%s_size"%self.name) def set_size(self, instance, size): setattr(instance, "%s_size"%self.name, size) def get_filename(self, instance): return getattr(instance, self.name) def set_filename(self, instance, filename): setattr(instance, self.name, filename) def get_width(self, instance): return getattr(instance, "%s_width"%self.name) def set_width(self, instance, width): setattr(instance, "%s_width"%self.name, width) def get_height(self, instance): return getattr(instance, "%s_height"%self.name) def set_height(self, instance, height): setattr(instance, "%s_height"%self.name, height) def get_manipulator_field_objs(self): if self.is_image: uploadType = oldforms.ImageUploadField else: uploadType = oldforms.FileUploadField return [uploadType, oldforms.HiddenField] def get_manipulator_field_names(self, name_prefix): return [name_prefix + self.name + '_file', name_prefix + self.name] def save_file(self, new_data, new_object, original_object, change, rel, save=True): upload_field_name = self.get_manipulator_field_names('')[0] if new_data.get(upload_field_name, False): if rel: new_content = new_data[upload_field_name][0]["content"] new_filename = new_data[upload_field_name][0]["filename"] else: new_content = new_data[upload_field_name]["content"] new_filename = new_data[upload_field_name]["filename"] self.set_filename(new_object, new_filename) self.set_size(new_object, len(new_content)) key = new_data["%s_key"%self.name] if not key: key = "_".join((new_object.__class__.__name__.lower(), str(new_object.id), self.name)) self.set_key(new_object, key) bucket = new_data["%s_bucket"%self.name] if not bucket: bucket = self.bucket content_type = new_data["%s_content_type"%self.name] if new_filename and not content_type: content_type = guess_type(new_filename)[0] if not content_type: content_type = "application/x-octet-stream" conn.put(bucket, key, S3.S3Object(new_content), { 'x-amz-acl': 'public-read' , 'Content-Type': content_type}) if self.is_image: # Calculate image width/height img = Image.open(StringIO(new_content)) width, height = img.size self.set_width(new_object, width) self.set_height(new_object, height) }}}