hook.io microservice for adding colors to text

colorsHook.js

var _colors = ["random", "red", "green", "blue", "yellow", "cyan", "rainbow", "zalgo"];

module['exports'] = function colorsHook (hook) {

  var colors = require('colors'),
      color = hook.params.color;
  
  var text = hook.params.text || "";

  // if random color is selected, return a random color
  if (color === "random") {
    color = _colors[Math.floor(Math.random()*_colors.length+1)-1]
  }

  if (text.length === 0) {
    text = color;
    // hook.res.end(color);
  }

 // If the hook is not currently streaming, req has already been fully buffered
 if (!hook.streaming) {
   //
   // To test a streaming Hook you can use Curl:
   //
   //  echo "foo" | curl --header "content-type: application/octet-stream"  --data-binary @- http://hook.io/Marak/transform
   //
   return hook.res.end(colors[color](text));
 }

 hook.req.on('end', function(){
   hook.res.end('request completed');
 });
 hook.req.on('data', function(chunk){
   hook.res.write(colors[color](chunk.toString()))
 });

};

module['exports'].schema = {
  "text": {
    "type": "string"
  },
  "color": {
    "type": "string",
    "enum": _colors,
    "default": "random"
  }
};