posterous REST API. using 'request' module

posterous_backup.js

var async = require('async');
var mysql = require('mysql');
var request = require('request');
var qs = require('querystring');

var Posterous = function(user, password, apiToken){
  this.user = user;
  this.password = password;
  this.token = apiToken;
};
Posterous.prototype.ifAbsent = function(value, validate){
  if(!validate(value)){
    throw new Error('invalid type:' + value);
  }
};
Posterous.prototype.createNewPost = function(siteId, title, body, tags, autoPost, displayDate, isPrivate, callback){
  this.ifAbsent(title, function(v){ return typeof v == 'string' });
  this.ifAbsent(tags, Array.isArray);
  //this.ifAbsent(displayDate, function(v){ return v.constructor == Date });

  var url = 'http://posterous.com/api/2/sites/' + siteId + '/posts';
  var parameter = {
    url: url,
    headers: {
      'Host': 'posterous.com',
      // basic auth
      'Authorization': new Buffer(this.user + ':' + this.password).toString('base64')
    },
    body: qs.stringify({
      'api_token': this.token,
      'site_id': siteId,
      'post[title]': title,
      'post[body]': body,
      'post[tags]': tags.join(','),
      'post[autopost]': autoPost.toString(),
      'post[display_date]': displayDate,
      'post[source]': 'node-posterous',
      'post[is_private]': isPrivate.toString()
    })
  };
  return request.post(parameter, function(err, response, body){
    if(err){
      return callback(err);
    }
    if(response.statusCode == 201){
      // 201 Created
      return callback(null, body);
    }
    return callback('error: ' + response.statusCode + ', ' + body);
  });
};

var posterous = new Posterous('[email protected]', 'password', 'authtoken');
/* example::
posterous.createNewPost(
  'nowelium',
  'hello world',
  'test test',
  ['nodejs', 'request'],
  false,
  '2013-03-24 00:00:09',
  false,
  function (err, results){
    console.log(err);
  }
);
*/

// p_blog_log backup example::
var client = mysql.createClient({
  host: 'localhost',
  user: 'user',
  password: 'pass',
  database: 'myblog'
});

var query = [];
query.push('SELECT id, name, category, comment, CAST(`mod` AS CHAR) AS modified_at');
query.push('FROM p_blog_log');
query.push('WHERE draft = 0');
query.push('ORDER BY id DESC');
query.push('LIMIT 1')

var parallel = [];
parallel.push(function(next){
  return client.query(query.join(' '), [], function(err, results){
    if(err){
      return next(err);
    }

    var serial = [];
    results.forEach(function(result){
      serial.push(function(subNext){
        return posterous.createNewPost(
          'nowelium',
          result['name'],
          result['comment'],
          result['category'].split(',').map(function(v){ return v.trim() }),
          false,
          result['modified_at'],
          false, function (err, results){
          if(err){
            return subNext(err);
          }
          return subNext(null);
        });
      });
    });
    return next(null, serial);
  });
});
async.parallel(parallel, function(err, results){
  if(err){
    console.error(err);
    return process.exit(1);
  }

  var serial = results.shift();
  return async.series(serial, function(err, results){
    if(err){
      console.error(err);
      return process.exit(1);
    }
    console.log('done');
    return process.exit(0);
  });
});