'Get the complete article with the specified index (or the currently
selected article if index is \'\') or Message-ID from the server.
gotArticle() is called on success, getArticleFailed() on failure.'

def fetchArticle(self, index=''):

    self.sendLine(('ARTICLE    %s' % (index,)))
    self._newState(self._stateArticle, self.getArticleFailed)
