long / aws-lambda-image Goto Github PK

An AWS Lambda Function to resize/reduce images automatically. When an image is put on AWS S3 bucket, this package will resize/reduce it and put to S3.

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

Clone this repository and install dependencies:

$ git clone [email protected]:ysugimoto/aws-lambda-image.git
$ cd aws-lambda-image
$ NODE_ENV=production npm install .

When upload to Lambda, the project will bundle all files. So we should ignore development packages (e.g. test tools)

If you are developper, please install all packages :-)

AWS Lambda accepts zip archived package. To create it, run make lambda task simply.

$ make lambda

It will create aws-lambda-image.zip at project root. You can upload it.

This works with config.json put on project root. There is config.json.sample as example. You can copy to use it.

$ cp config.json.sample config.json

Configuration is simple, see below:

{
  "bucket": "your-destination-bucket",
  "backup": {
      "directory": "./original",
  },
  "reduce": {
      "directory": "./reduced",
      "prefix": "reduced-",
      "quality": 90,
      "acl": "public-read"
  },
  "resizes": [
    {
      "size": 300,
      "directory": "./resized/small",
      "prefix": "resized-",
    },
    {
      "size": 450,
      "directory": "./resized/medium",
      "suffix": "_medium"
    },
    {
      "size": "600x600^",
      "gravity": "Center",
      "crop": "600x600",
      "directory": "./resized/cropped-to-square"
    },
    {
      "size": 600,
      "directory": "./resized/600-jpeg",
      "format": "jpg",
      "background": "white"
    },
    {
      "size": 900,
      "directory": "./resized/large",
      "quality": 90
    }
  ]
}

If you want to check how this works with your configuration, you can use configtest:

$ make configtest

You can handle resize/reduce/backup process on success/error result on index.js. ImageProcessor::run will return Promise object, run your original code:

processor.run(config)
.then(function(proceedImages)) {

    // Success case:
    // proceedImages is list of ImageData instance on you configuration

    /* your code here */

    // notify lambda
    context.succeed("OK, numbers of " + proceedImages.length + " images has proceeded.");
})
.catch(function(messages) {

    // Failed case:
    // messages is list of string on error messages

    /* your code here */

    // notify lambda
    context.fail("Woops, image process failed: " + messages);
});

• ImageMagick (installed on AWS Lambda)

• cjpeg
• pngquant
• pngout

MIT License.

Yoshiaki Sugimoto

Thanks for testing fixture images:

• http://pngimg.com/
• https://www.pakutaso.com/