Added Dropbox storage

AUTHORS

@@ -22,6 +22,7 @@ By order of apparition, thanks:
     * Andrei Coman (Azure)
     * Chris Streeter (S3 with Boto)
     * Josh Schneier (Fork maintainer, Bugfixes, Py3K)
+    * Anthony Monthe (Dropbox)
 
 Extra thanks to Marty for adding this in Django,
 you can buy his very interesting book (Pro Django).

requirements-tests.txt

@@ -0,0 +1,5 @@
+Django>=1.6.2
+pytest==2.6.4
+boto>=2.32.0
+dropbox>=3.24
+mock

setup.py

@@ -1,12 +1,15 @@
 from setuptools import setup
-
 import storages
 
 
 def read(filename):
     with open(filename) as f:
         return f.read()
 
+def readlines(filename):
+    with open(filename) as f:
+        return f.readlines()
+
 setup(
     name='django-storages-redux',
     version=storages.__version__,
@@ -31,13 +34,7 @@ def read(filename):
         'Programming Language :: Python :: 3.3',
         'Programming Language :: Python :: 3.4',
     ],
-    tests_require=[
-        'Django>=1.6.2',
-        'pytest',
-        'mock',
-        'boto>=2.32.0',
-        'dropbox>=2.2.0'
-    ],
+    tests_require=readlines('requirements-tests.txt'),
     test_suite='tests',
     zip_safe=False
 )

storages/backends/dropbox.py

@@ -0,0 +1,91 @@
+# Dropbox storage class for Django pluggable storage system.
+# Author: Anthony Monthe <anthony.monthe@gmail.com>
+# License: BSD
+#
+# Usage:
+#
+# Add below to settings.py:
+# DROPBOX_OAUTH2_TOKEN = 'YourOauthToken'
+
+from __future__ import absolute_import
+
+from datetime import datetime
+
+from django.core.files.base import File
+from django.core.exceptions import ImproperlyConfigured
+
+from storages.compat import BytesIO, Storage
+from storages.utils import setting
+
+from dropbox.client import DropboxClient
+
+DATE_FORMAT = '%a, %d %b %Y %X +0000'
+
+
+class DropBoxStorageException(Exception):
+    pass
+
+
+class DropBoxFile(File):
+    def __init__(self, name, storage):
+        self.name = name
+        self._storage = storage
+
+    def read(self, num_bytes=None):
+        self._storage._read(self.name, num_bytes=num_bytes)
+
+    def write(self, content):
+        self._storage._save(self.name, content)
+
+
+class DropBoxStorage(Storage):
+    """DropBox Storage class for Django pluggable storage system."""
+
+    def __init__(self, oauth2_access_token=setting('DROPBOX_OAUTH2_TOKEN')):
+        if oauth2_access_token is None:
+            raise ImproperlyConfigured("You must configure a token auth at"
+                                       "'settings.DROPBOX_OAUTH2_TOKEN'.")
+        self.client = DropboxClient(oauth2_access_token)
+
+    def delete(self, name):
+        self.client.file_delete(name)
+
+    def exists(self, name):
+        response = self.client.search('/', name, file_limit=1)
+        return bool(response)
+
+    def listdir(self, path):
+        directories, files = [], []
+        metadata = self.client.metadata(path)
+        for entry in metadata['contents']:
+            if entry['is_dir']:
+                directories.append(entry['path'])
+            else:
+                files.append(entry['path'])
+        return directories, files
+
+    def size(self, name):
+        metadata = self.client.metadata(name)
+        return metadata['bytes']
+
+    def modified_time(self, name):
+        metadata = self.client.metadata(name)
+        mod_time = datetime.strptime(metadata['modified'], DATE_FORMAT)
+        return mod_time
+
+    def accessed_time(self, name):
+        metadata = self.client.metadata(name)
+        acc_time = datetime.strptime(metadata['client_mtime'], DATE_FORMAT)
+        return acc_time
+
+    def _open(self, name):
+        remote_file = DropBoxFile(name, self)
+        return remote_file
+
+    def _save(self, name, content):
+        self.client.put_file(name, BytesIO(content))
+        return name
+
+    def _read(self, name, num_bytes=None):
+        data = self.client.get_file(name)
+        return data.read(num_bytes)

tests/test_dropbox.py

@@ -1,17 +1,16 @@
 import re
-from io import BytesIO
 from datetime import datetime
 try:
     from unittest import mock
 except ImportError:  # Python 3.2 and below
     import mock
 
 from django.test import TestCase
-from django.core.files.base import File
+from django.core.files.base import File, ContentFile
 
 from storages.backends import dropbox
 
-FILE_DATE = datetime(2015, 8, 24, 15, 06, 41)
+FILE_DATE = datetime(2015, 8, 24, 15, 6, 41)
 FILE_FIXTURE = {
     'bytes': 4,
     'client_mtime': 'Mon, 24 Aug 2015 15:06:41 +0000',
@@ -114,10 +113,10 @@ def test_open(self, *args):
     @mock.patch('dropbox.client.DropboxClient.put_file',
                 return_value='foo')
     def test_save(self, *args):
-        self.storage._save('foo', 'bar')
+        self.storage._save('foo', b'bar')
 
     @mock.patch('dropbox.client.DropboxClient.get_file',
-                return_value=BytesIO('bar'))
+                return_value=ContentFile('bar'))
     def test_read(self, *args):
         content = self.storage._read('foo')
         self.assertEqual(content, 'bar')
@@ -134,10 +133,10 @@ def setUp(self, *args):
     @mock.patch('dropbox.client.DropboxClient.put_file',
                 return_value='foo')
     def test_write(self, *args):
-        self.storage._save('foo', 'bar')
+        self.storage._save('foo', b'bar')
 
     @mock.patch('dropbox.client.DropboxClient.get_file',
-                return_value=BytesIO('bar'))
+                return_value=ContentFile('bar'))
     def test_read(self, *args):
         content = self.storage._read('foo')
         self.assertEqual(content, 'bar')

tox.ini

@@ -13,4 +13,4 @@ deps =
     py27: mock==1.0.1
     boto>=2.32.0
     pytest==2.6.4
-    dropbox>=2.2.0
+    dropbox>=3.24