--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/user_photos/images.py	Sun Sep 08 19:06:54 2013 -0500
@@ -0,0 +1,86 @@
+"""images.py
+
+This module contains image processing routines for the user_photos application.
+
+"""
+import datetime
+import logging
+from io import BytesIO
+import os.path
+import uuid
+
+from django.conf import settings
+from PIL import Image
+from boto.s3.connection import S3Connection
+from boto.s3.key import Key
+
+
+logger = logging.getLogger(__name__)
+
+
+def process_file(f, user):
+    """Perform processing on the given uploaded image file:
+
+    * The image is resized if necessary
+    * A thumbnail version is created
+    * The image and thumbnail are uploaded to an S3 bucket
+    * The image and thumbnail URLs are returned as a tuple
+
+    """
+    logger.info('Processing image file for {}: {}'.format(user.username, f.name))
+
+    unique_key = uuid.uuid4().hex
+    ext = os.path.splitext(f.name)[1]
+    filename = '/tmp/' + unique_key + ext
+    with open(filename, 'wb') as fp:
+        for chunk in f.chunks():
+            fp.write(chunk)
+
+    # Resize image if necessary
+    image = Image.open(filename)
+    if image.size > settings.USER_PHOTOS_MAX_SIZE:
+        logger.debug('Resizing from {} to {}'.format(image.size, settings.USER_PHOTOS_MAX_SIZE))
+        image.thumbnail(settings.USER_PHOTOS_MAX_SIZE, Image.ANTIALIAS)
+        image.save(filename)
+
+    # Create thumbnail
+    logger.debug('Creating thumbnail')
+    image = Image.open(filename)
+    image.thumbnail(settings.USER_PHOTOS_THUMB_SIZE, Image.ANTIALIAS)
+    thumb = BytesIO()
+    image.save(thumb, format=image.format)
+
+    # Upload both images to S3
+    logger.debug('Getting connection / bucket')
+    conn = S3Connection(settings.USER_PHOTOS_ACCESS_KEY,
+                        settings.USER_PHOTOS_SECRET_KEY)
+    bucket = conn.get_bucket(settings.USER_PHOTOS_BUCKET, validate=False)
+
+    now = datetime.datetime.now().strftime('%Y-%m-%d %H:%M:%S')
+
+    logging.debug('Uploading image')
+    k1 = Key(bucket)
+    k1.key = unique_key + ext
+    k1.set_metadata('user', user.username)
+    k1.set_metadata('date', now)
+    k1.set_contents_from_filename(filename)
+
+    logging.debug('Uploading thumbnail')
+    k2 = Key(bucket)
+    k2.key = '{}t{}'.format(unique_key, ext)
+    k2.set_metadata('user', user.username)
+    k2.set_metadata('date', now)
+    k2.set_contents_from_string(thumb.getvalue())
+
+    logging.debug('Making public')
+    k1.make_public()
+    k2.make_public()
+
+    os.remove(filename)
+
+    logger.info('Completed processing image file for {}: {}'.format(user.username, f.name))
+
+    url_base = '{}/{}/'.format(settings.USER_PHOTOS_BASE_URL,
+                               settings.USER_PHOTOS_BUCKET)
+
+    return (url_base + k1.key, url_base + k2.key)