withings-internal-api.js

'use strict';

var crypto = require('crypto');
var debug = require('debug')('withings');
var request = require('request');
var _ = require('lodash');

var EMAIL = process.env.EMAIL;
var PASSWORD = process.env.PASSWORD;

var BASE_URL = 'http://scalews.withings.net';

function md5(string) {
  var md5sum = crypto.createHash('md5');

  md5sum.update(string);

  return md5sum.digest('hex');
}

var DEFAULTS = {
  appliver: '20409',
  appname: 'wiscaleNG',
  apppfm: 'ios',
  callctx: 'foreground'
};

function Withings(email, password) {
  this.email = email;
  this.password = password;
}

Withings.prototype.post = function post(url, form, cb) {
  form = _.defaults(form, DEFAULTS);

  if (this.sessionId) {
    form.sessionid = this.sessionId;
  }

  if (this.userId) {
    form.userid = this.userId;
  }

  request.post({
    url: BASE_URL + url,
    form: _.defaults(form, DEFAULTS),
    headers: {
      'User-Agent': 'Withings/20411 CFNetwork/711.1.16 Darwin/14.0.0',
      'Accept-Language': 'en-us'
    },
    gzip: true,
    json: true
  }, cb);
};

Withings.prototype.once = function once(cb) {
  debug('POST once');

  this.post('/cgi-bin/once', {action: 'get'}, function (err, res, body) {
    if (err || body.status !== 0) {
      console.log('error getting random one-time code');

      process.exit(1);
    }

    cb(body.body.once);
  });
};

Withings.prototype.session = function session(once, cb) {
  debug('POST session');

  var hash = md5(this.email + ':' + md5(this.password) + ':' + once);

  this.post('/cgi-bin/session', {
    action: 'new',
    auth: this.email,
    duration: 600,
    hash: hash
  }, function (err, res, body) {
    if (err || body.status !== 0) {
      console.log('error getting session');
      console.log(err, body);

      process.exit(1);
    }

    cb(body.body);
  });
};

Withings.prototype.user = function user(cb) {
  debug('POST user');

  this.post('/cgi-bin/account', {
    action: 'getuserslist',
    recurse_devtype: '1',
    enrich: 't',
    recurse_use: '1',
    listmask: '7',
    accountid: this.accountId
  }, function (err, res, body) {
    if (err || body.status !== 0) {
      console.log('error getting user');
      console.log(err, body);

      process.exit(1);
    }

    cb(body.body.users[0]);
  });
};

Withings.prototype.login = function (cb) {
  debug('login');

  var self = this;

  self.once(function (once) {
    self.session(once, function (session) {
      self.sessionId = session.sessionid;
      self.accountId = session.accountid;

      self.user(function (user) {
        self.userId = user.id;
        self.userInfo = user;

        cb();
      });
    });
  });
};

var withings = new Withings(EMAIL, PASSWORD);

withings.login(function () {
  withings.post('/cgi-bin/v2/measure', {
    action: 'getvasistas',
    devicetype: '32',
    meastype: '36,37,38,39,40,41,42,43,44',
    startdate: '1422432000',
    enddate: '1422518399'
  }, function (err, res, body) {
    if (err) {
      throw err;
    }

    var sleep = _.flatten(body.body.series[0].vasistas);
    var timestamps = body.body.series[0].dates;

    var rows = _.zip(timestamps, sleep);

    _.each(rows, function (row) {
      console.log(row.join(','));
    });
  });
});