A little helper Class to send MetaWeblog API requests.

metaweblog.js

var xmlrpc = require('xmlrpc')
  , parse  = require('url').parse
  , slice  = Array.prototype.slice

function MetaWeblog (url) {
  var parsed = parse(url)
    , client = xmlrpc.createClient({
        host: parsed.hostname 
      , path: parsed.pathname
      , port: parsed.port || 80
    });
  this.client = client;
}
module.exports = MetaWeblog;

MetaWeblog.prototype._request = function request (method, args) {
  var cb = args[args.length-1]
    , params = slice.call(args, 0, -1)
  this.client.methodCall(method, params, cb);
};

[ 'metaWeblog.newPost'
, 'metaWeblog.editPost'
, 'metaWeblog.getPost'
, 'metaWeblog.getRecentPosts'
, 'metaWeblog.newMediaObject'
//, 'metaWeblog.getCategories' // collision with wp.getCategories
, 'wp.getUsersBlogs'
, 'wp.getTags'
, 'wp.getAuthors'
, 'wp.getOptions'
, 'wp.setOptions'
, 'wp.getPostStatusList'
, 'wp.getPostFormats'
, 'wp.getComments'
, 'wp.getCommentCount'
, 'wp.getComment'
, 'wp.deleteComment'
, 'wp.editComment'
, 'wp.newComment'
, 'wp.getCommentStatusList'
, 'wp.getPageStatusList'
, 'wp.getPageTemplates'
, 'wp.getPage'
, 'wp.getPages'
, 'wp.getPageList'
, 'wp.newPage'
, 'wp.deletePage'
, 'wp.editPage'
, 'wp.getCategories'
, 'wp.newCategory'
, 'wp.deleteCategory'
, 'wp.suggestCategories'
, 'wp.uploadFile'
, 'wp.getMediaLibrary'
, 'wp.getMediaItem'
].forEach(function (m) {
  var n = m.split('.');
  n = n[n.length-1];
  MetaWeblog.prototype[n] = function () {
    this._request(m, arguments);
  };
});