Proof of concept to reproduce https://github.com/twolfson/grunt-curl/issues/15

.gitignore

node_modules/
assets/

Gruntfile.js

module.exports = function(grunt) {

  // Project configuration.
  grunt.initConfig({
    curl: {
      'assets/css/icomoon.css':        'https://s3.amazonaws.com/icomoon.io/27973/ActiveBuilding/style.css',
      'assets/css/fonts/icomoon.eot':  'https://s3.amazonaws.com/icomoon.io/27973/ActiveBuilding/icomoon.eot',
      'assets/css/fonts/icomoon.woff': 'https://s3.amazonaws.com/icomoon.io/27973/ActiveBuilding/icomoon.woff',
      'assets/css/fonts/icomoon.ttf':  'https://s3.amazonaws.com/icomoon.io/27973/ActiveBuilding/icomoon.ttf',
      'assets/css/fonts/icomoon.svg':  'https://s3.amazonaws.com/icomoon.io/27973/ActiveBuilding/icomoon.svg'
    }
  });

  grunt.loadNpmTasks('grunt-curl');

  // Default task.
  grunt.registerTask('default', ['curl']);

};

package.json

{
  "name": "gist-grunt-curl-15",
  "description": "The best project ever.",
  "version": "0.1.0",
  "homepage": "https://github.com/todd/gist-grunt-curl-15",
  "author": {
    "name": "Todd Wolfson",
    "email": "todd@twolfson.com",
    "url": "http://twolfson.com/"
  },
  "repository": {
    "type": "git",
    "url": "git://github.com/todd/gist-grunt-curl-15.git"
  },
  "bugs": {
    "url": "https://github.com/todd/gist-grunt-curl-15/issues"
  },
  "licenses": [
    {
      "type": "UNLICENSE",
      "url": "https://github.com/todd/gist-grunt-curl-15/blob/master/UNLICENSE"
    }
  ],
  "main": "index",
  "engines": {
    "node": ">= 0.8.0"
  },
  "scripts": {
    "test": "echo \"No tests =(\" 1>&2 && exit 1"
  },
  "dependencies": {
    "grunt-curl": "~1.4.0"
  },
  "devDependencies": {
    "grunt": "~0.4.1"
  },
  "keywords": []
}