A simple Django app that allows for optimization of images.
Optimized-image is a simple Django library to allows optimization of images by using TinyPNG. Saving an image locally to an OptimizedImageField uses TinyPNG to optimize the image, then S3 to store it.
Detailed documentation is in the “docs” directory.
Add “optimized_image” to your INSTALLED_APPS setting like this:
INSTALLED_APPS = [ ... 'optimized_image', ]
Because optimized_image uses TinyPNG and S3, you will need to get API keys from each of them. Visit https://tinypng.com/developers and http://docs.aws.amazon.com/AmazonS3/latest/gsg/CreatingABucket.html for more details on getting a TinyPNG API key (easy) and setting up an S3 bucket (harder). Once you have done so, add the following settings to your settings file. Note: it is a good idea to keep most, if not all, of these secret:
TINYPNG_KEY # Go to S3_KEY_ID S3_ACCESS_KEY S3_REGION S3_BUCKET S3_OPTIMIZED_IMAGES_FOLDER
Migrate the optimized_image models:
python manage.py migrate optimized_image
You may use the OptimizedImageField by importing it:
from optimized_image.fields import OptimizedImageField
and saving images into it, the same way you would to a Django ImageField.
You may get an optimized url by using the get_optimized_url function for an instance of an object. For a blogpost with an image field that has had an image uploaded you may run:
from optimized_image.utils import get_optimized_url get_optimized_url(blogpost, ‘image’)
If you want to change legacy models with Django’s Image fields and optimize the images in those fields, you may do so for legacy models by passing a list of legacy model classes (not their instances) to the following function:
from optimized_image.utils import optimize_legacy_images_in_model_fields optimize_legacy_images_in_model_fields([LegacyModelClass1, LegacyModelClass2])
Note: this function makes calls to TinyPNG and S3, so it can take a really long time, depending on how many images you have. You may pass in 1 for the verbosity parameter to get logs on the progress:
optimize_legacy_images_in_model_fields([LegacyModelClass1, LegacyModelClass2], verbosity=1)
Note about TinyPNG API keys: If you obtain the free TinyPNG API token, you are limited to 500 image optimizations per month, so this function may fail if you have a lot of images. You may either obtain a paid API key, or wait until next month.