Resize a remote image

imageResize.js

var gm = require('gm');

module['exports'] = function resizeImage (hook, callback) {

  hook.debug('Opening image stream');
  var readStream = hook.open(hook.params.image);  

  hook.debug('Sending image/png header');
  hook.res.writeHead(200, { 'Content-Type': 'image/png' });

  gm(readStream)
  .options({imageMagick: true})
  .resize(hook.params.width, hook.params.height)
  .stream()
  .pipe(hook.res)

};

module['exports'].schema = {
  "image": {
    "type": "string",
    "default": "http://hook.io/img/logo.png"
  },
  "height": {
    "type": "number",
    "default": 200
  },
  "width": {
    "type": "number",
    "default": 200
  }
};