Client for Lambda Labs face-detection API

face.js

var https  = require('https')
  , crypto = require('crypto')

function Face(publicKey, privateKey){
    this.publicKey = publicKey
    this.privateKey = privateKey
}

Face.prototype.detect = function(images, callback){

    if (!/Array|String/.test(Object.prototype.toString.call(images))){
        callback(new Error('images must be String or Array'))
        return
    }

    var hash = crypto.createHmac('sha1', this.privateKey)
        .update(this.publicKey)
        .digest('hex')

    var authorization = new Buffer(this.publicKey+':'+hash).toString('base64')

    var options = {
        host: 'lambda-face-detection-and-recognition.p.mashape.com'
      , path: '/detect?images=' + images
      , method: 'GET'
      , headers: { 'X-Mashape-Authorization': authorization }
    }

    https.get(options, function(res){

        var data = ''
        res.on('data', function(d){
            data += d
        })

        res.on('end', function(){
            try {
                data = JSON.parse(data)
            } catch (err) {
                return callback(err)
            }

            callback(null, data)
        })
        
    }).on('error', callback)
}

module.exports = Face