AWS S3 Image Uploader

Flexible and efficient resize, rename, and upload images to Amazon S3 disk storage. Uses the official AWS Node SDK and GM for image processing.

Install

npm install s3-uploader --save

Requirements

• Node.JS >= v0.10
• imagemagic
• AWS credentials environment variables
  • AWS_ACCESS_KEY_ID
  • AWS_SECRET_ACCESS_KEY

API

var Upload = require('s3-uploader');

new Upload(string awsBucketName, object opts)

• string awsBucketName - name of Amazon S3 bucket
• object opts - global upload options

  • number resizeQuality - thumbnail resize quallity (default 70)

  • boolean returnExif - return exif data for original image (default false)

  • string tmpDir - directory to store temporary files (default os.tmpdir())

  • number workers - number of async workers (default 1)

  • string url - custom public url (default build from region and awsBucketName)

  • object aws - AWS SDK configuration optsion

    • string region - region for you bucket (default us-east-1)
    • string path - path within your bucket (default "")
    • string acl - default ACL for uploded images (default privat)
    • string accessKeyId - AWS access key ID override
    • string secretAccessKey - AWS secret access key override

The aws object is passed directly to aws-sdk. You can add any of these options in order to fine tune the connection – if you know what you are doing.

• object[] versions - versions to upload to S3
  • boolean original - set this to true to save the original image
  • string suffix - this is appended to the file name (default "")
  • number quality - resized image quality (default resizeQuality)
  • number maxWidth - max width for resized image
  • number maxHeight - max height for resized image

Example

var client = new Upload('my_s3_bucket', {
  awsBucketRegion: 'us-east-1',
  awsBucketPath: 'images/',
  awsBucketAcl: 'public-read',

  versions: [{
    original: true
  },{
    suffix: '-large',
    quality: 80,
    maxHeight: 1040,
    maxWidth: 1040,
  },{
    suffix: '-medium',
    maxHeight: 780,
    maxWidth: 780
  },{
    suffix: '-small',
    maxHeight: 320,
    maxWidth: 320
  }]
});

#upload(string src, object opts, function cb)

• string src - absolute path to source image to upload

• object opts - upload config options

  • string awsPath - local override for opts.aws.path

• function cb - callback function (Error err, object[] versions, object meta)

  • Error err - null if everything went fine
  • object[] versions - original and resized images with path/location
  • object meta - metadata for original image

Example

client.upload('/some/file/path.jpg', {}, function(err, images, meta) {
  if (err) {
    console.error(err);
  } else {
    for (var i = 0; i < images.length; i++) {
      console.log('Thumbnail with width %i, height %i, at %s', images[i].width, images[i].height, images[i].url);
    }
  }
});

Algorithm

A
+-- B
    `-- C
    `-- D
    `-- E

Where A is the original image uploaded by the user. An mpc image is created, B,
which is used to crate the thumbnails C, D, and E.

MIT License