dariospadoni / aws-lambda-image-compressor

AWS lambda function to compress and resize images

aws-lambda-image-compressor

AWS lambda function to compress and resize images

This is a Lambda Function which resizes/reduces images automatically. When an image is put on some AWS S3 bucket, this function will resize/reduce it and save it into a new bucket.

I found 2 projects which doing the same but I could not make them properly work. With the first I could not compress PNG images; with the second I had issues with packaging and module dependency on S3.

I then decided to write my simple function and some gulp task to quickly deploy it into AWS. This article was a great reference.

Flow

The function should be invoked by a S3 trigger when a new image is uploaded to some S3 bucket. Once invoked, the function compresses and resizes (if needed) the original image and save those copies into another bucket. You can easily configure the widths of the resized image and their destination bucket/subfolder.

• PNG images are saved as JPG
• if an image is smaller than a desired resizing, it is copied without being resized into destination bucket

Requirements

• node.js (AWS Lambda working version is 4.3.2)

Usage

• edit lambda-config.js file and assign name, description, memory size, timeout of your lambda function.
• edit .env file with your AWS access data
• npm install
• gulp deploy

Update Runtime

In case you need to update your runtime environment, you can run the following command:

aws lambda update-function-configuration --function-name <function name as in lambda-config.js> --runtime nodejs4.3

Todo

• some code optimization
• tests
• read images compression/resizing configuration from an external json file

aws-lambda-image-compressor's Issues

Stream yields empty buffer error

Hi,

First of all thanks for your script. It is extremely useful.
Unfortunately O get the following error: error during image optimization: Error: Stream yields empty buffer.

Do you have any idea where this comes from?

Kind regards

multiple creation of folders.

With the script, when i put an Image, I have too many files created.

Maybe the folder has to be created before the prefix. So The event will not call itself.

Successful messages logged but no images are found in folder

My cloudwatch logs all say the processes were completed and the image was being uploaded to the bucket, but the bucket has nothing in it.

2016-12-01T20:18:46.665Z uploading image EYuB7tLbLF8bFk9aJ/small/testfile.jpg to bucket testbucket-optim

2016-12-01T20:18:48.765Z image uploaded

Any idea where I might look to resolve this?