aws-lambda-image-compressor

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aws-lambda-image-compressor

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AWS lambda function to compress and resize images

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# 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](https://github.com/ysugimoto/aws-lambda-image) I could not compress PNG images; with the [second](https://github.com/slimfancy/image-lambda) 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](http://jice.lavocat.name/blog/2015/image-conversion-using-amazon-lambda-and-s3-in-node.js/) 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

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