kraken-buffer/lib/kraken.js

Plug into the power and speed of Kraken.io Image Optimizer

/*!
* Kraken
* Copyright (c) 2013 Przemek Matylla <przemek@matylla.pl>
* MIT Licensed
*/


/**
* Module dependencies.
*/

var https = require('https')
  , fs    = require('fs')
  , path  = require('path')
  , multi = require('multiparter')
  , mime  = require('mime')
  , stream = require('stream');


/**
* Constructor
*/

var Kraken = module.exports = function(opts) {
    this.auth = {
        api_key: opts.api_key || '',
        api_secret: opts.api_secret || ''
    };
};


/**
* Pass the given `image` URL along with credentials to Kraken API via HTTPS POST.
*
* @param {Object} opts
* @param {Function} cb
* @api public
*/

Kraken.prototype.url = function(opts, cb) {
    opts.auth = this.auth;

    var jsonData = JSON.stringify(opts);

    var options = {
        host: 'api.kraken.io',
        path: '/v1/url',
        method: 'POST',
        headers: {
          'Content-Length': jsonData.length,
          'Content-Type': 'application/json',
          'Accept': 'application/json'
        }
    };

    var req = https.request(options, function(res) {
        res.setEncoding('utf8');

        res.on('data', function(data) {
            cb(JSON.parse(data));
        });
    });

    req.on('error', function(e) {
        return cb({
            'success': false,
            'error': 'Error while sending HTTPS request'
        });
    });

    req.write(jsonData);
    req.end();
};


/**
* Upload the given `file` along with credentials to Kraken API via HTTPS POST.
*
* @param {Object} opts
* @param {Function} cb
* @api public
*/

Kraken.prototype.upload = function(opts, cb) {
    opts.auth = this.auth;

    var file = opts.file;

    var req = new multi.request(https, {
        host: 'api.kraken.io',
        path: '/v1/upload',
        method: 'POST'
    });

    delete opts.file;

    req.setParam('data', JSON.stringify(opts));

    var bufferStream = new stream.PassThrough();

    req.addStream(
        'upload',
        'image',
        'image/png',
        file.length,
        bufferStream
    );

    req.send(function(err, res) {
        if (err) {
            return cb({
                'success': false,
                'error': 'Error while sending HTTPS request'
            });
        }

        var data = '';

        res.setEncoding('utf8');

        res.on('data', function(chunk) {
            data += chunk;
        });

        res.on('end', function() {
            cb(JSON.parse(data));
        });

        res.on('error', function(err) {
            cb(err);
        });
    });

    bufferStream.end( file );
};