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A node.js module to resize, crop and upload images to Rackspace cloudfiles and Amazon S3

Build Status Gittip Dependencies


A node module to resize, crop and upload images (with different variants and presets) to Rackspace cloudfiles and Amazon S3.


You need to have ImageMagick installed, otherwise you will get weird errors.


$ npm install imager


You need to create imager configuration file with image variants and your storages

Checkout the example config file imager-config-example.js in the repo

var Imager = require('imager');
    // See for example configuration
  , imagerConfig = require('path/to/imager-config.js')
  , imager = new Imager(imagerConfig, 'Rackspace') // or 'S3' for amazon

Uploading file(s)

The callback recieves an err object, a files array (containing the names of the files which were uploaded) and the cdnUri.

So if you have a variant, say thumb, then you can access the image by cdnUri+'/'+'thumb_'+files[0]. This would be the complete url of the image

  1. Form upload (multiple images)

    If you are using express, you will recieve all the form files in req.files.

    imager.upload([req.files.image], function(err, cdnUri, files) {
        // do your stuff
    }, 'items')

    Here, items is your scope or variant. If you don't specify the scope or the variant, imager will try to look for a default variant named default. You must either specify a variant like above or provide a default variant.

    ONLY WORKS WITH S3 If you add an uploadDirectory field to the imager config file as shown in imager-config-example.js, the files uploaded will go into that specific folder rather than the root of the bucket. If you leave out the uploadDirectory field, uploads will default to the root of the bucket.

  2. Upload local images

    imager.upload(['/path/to/file'], function (err, cdnUri, files) {
      // do your stuff
    }, 'items')

    Here files can be an array or a string. Make sure the path is absolute.

Removing file(s)

var files = ['1330838831049.png', '1330838831049.png']
imager.remove(files, function (err) {
  // do your stuff
}, 'items')

files can be array of filenames or a string of single filename.

Even here, if the variant is not specified, imager will try to look for the default variant. If neither of them are provided, you will get an error.


  1. If your bucket name contains dot(s) make sure you set secure: false, otherwise you will run into this.
  2. Setting the keepNames: true for the variant retains the name of the uploaded file; otherwise you can set your custom rename function for each variant (check the example imager config)
  3. If you specify debug: true in the imager config, you can see the logs of uploaded / removed files.
  4. If you want to upload the original image, use

    resize: {
        original: "100%"


$ npm test



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