完善好的函数

function ajaxComment($archive){
$options = Helper::options();
$user = Typecho_Widget::widget('Widget_User');
$db = Typecho_Db::get();
// Security 验证不通过时会直接跳转，所以需要自己进行判断
// 需要开启反垃圾保护，此时将不验证来源
if($archive->request->get('_') != Helper::security()->getToken($archive->request->getReferer())){
    $archive->response->throwJson(array('status'=>0,'msg'=>_t('非法请求')));
}
/** 评论关闭 */
if(!$archive->allow('comment')){
    $archive->response->throwJson(array('status'=>0,'msg'=>_t('评论已关闭')));
}
/** 检查ip评论间隔 */
if (!$user->pass('editor', true) && $archive->authorId != $user->uid &&
$options->commentsPostIntervalEnable){
    $latestComment = $db->fetchRow($db->select('created')->from('table.comments')
                ->where('cid = ?', $archive->cid)
                ->where('ip = ?', $archive->request->getIp())
                ->order('created', Typecho_Db::SORT_DESC)
                ->limit(1));

    if ($latestComment && ($options->gmtTime - $latestComment['created'] > 0 &&
    $options->gmtTime - $latestComment['created'] < $options->commentsPostInterval)) {
        $archive->response->throwJson(array('status'=>0,'msg'=>_t('对不起, 您的发言过于频繁, 请稍侯再次发布')));
    }        
}

$comment = array(
    'cid'       =>  $archive->cid,
    'created'   =>  $options->gmtTime,
    'agent'     =>  $archive->request->getAgent(),
    'ip'        =>  $archive->request->getIp(),
    'ownerId'   =>  $archive->author->uid,
    'type'      =>  'comment',
    'status'    =>  !$archive->allow('edit') && $options->commentsRequireModeration ? 'waiting' : 'approved'
);

/** 判断父节点 */
if ($parentId = $archive->request->filter('int')->get('parent')) {
    if ($options->commentsThreaded && ($parent = $db->fetchRow($db->select('coid', 'cid')->from('table.comments')
    ->where('coid = ?', $parentId))) && $archive->cid == $parent['cid']) {
        $comment['parent'] = $parentId;
    } else {
        $archive->response->throwJson(array('status'=>0,'msg'=>_t('父级评论不存在')));
    }
}
$feedback = Typecho_Widget::widget('Widget_Feedback');
//检验格式
$validator = new Typecho_Validate();
$validator->addRule('author', 'required', _t('必须填写用户名'));
$validator->addRule('author', 'xssCheck', _t('请不要在用户名中使用特殊字符'));
$validator->addRule('author', array($feedback, 'requireUserLogin'), _t('您所使用的用户名已经被注册,请登录后再次提交'));
$validator->addRule('author', 'maxLength', _t('用户名最多包含200个字符'), 200);

if ($options->commentsRequireMail && !$user->hasLogin()) {
    $validator->addRule('mail', 'required', _t('必须填写电子邮箱地址'));
}

$validator->addRule('mail', 'email', _t('邮箱地址不合法'));
$validator->addRule('mail', 'maxLength', _t('电子邮箱最多包含200个字符'), 200);

if ($options->commentsRequireUrl && !$user->hasLogin()) {
    $validator->addRule('url', 'required', _t('必须填写个人主页'));
}
$validator->addRule('url', 'url', _t('个人主页地址格式错误'));
$validator->addRule('url', 'maxLength', _t('个人主页地址最多包含200个字符'), 200);

$validator->addRule('text', 'required', _t('必须填写评论内容'));

$comment['text'] = $archive->request->text;

/** 对一般匿名访问者,将用户数据保存一个月 */
if (!$user->hasLogin()) {
    /** Anti-XSS */
    $comment['author'] = $archive->request->filter('trim')->author;
    $comment['mail'] = $archive->request->filter('trim')->mail;
    $comment['url'] = $archive->request->filter('trim')->url;

    /** 修正用户提交的url */
    if (!empty($comment['url'])) {
        $urlParams = parse_url($comment['url']);
        if (!isset($urlParams['scheme'])) {
            $comment['url'] = 'http://' . $comment['url'];
        }
    }

    $expire = $options->gmtTime + $options->timezone + 30*24*3600;
    Typecho_Cookie::set('__typecho_remember_author', $comment['author'], $expire);
    Typecho_Cookie::set('__typecho_remember_mail', $comment['mail'], $expire);
    Typecho_Cookie::set('__typecho_remember_url', $comment['url'], $expire);
} else {
    $comment['author'] = $user->screenName;
    $comment['mail'] = $user->mail;
    $comment['url'] = $user->url;

    /** 记录登录用户的id */
    $comment['authorId'] = $user->uid;
}

/** 评论者之前须有评论通过了审核 */
if (!$options->commentsRequireModeration && $options->commentsWhitelist) {
    if ($feedback->size($feedback->select()->where('author = ? AND mail = ? AND status = ?', $comment['author'], $comment['mail'], 'approved'))) {
        $comment['status'] = 'approved';
    } else {
        $comment['status'] = 'waiting';
    }
}

if ($error = $validator->run($comment)) {
    $archive->response->throwJson(array('status'=>0,'msg'=> implode(';',$error)));
}
//评论过程的插件接口，一般用于过滤垃圾评论的插件
try {
 $comment = $feedback->pluginHandle()->comment($comment, $feedback->_content);
} catch (Typecho_Exception $e) {
 Typecho_Cookie::set('__typecho_remember_text', $comment['text']);
 $archive->response->throwJson(array('status'=>0,'msg'=>_t($e->getMessage())));
 throw $e;
}
/** 添加评论 */
$commentId = $feedback->insert($comment);
Typecho_Cookie::delete('__typecho_remember_text');
$db->fetchRow($feedback->select()->where('coid = ?', $commentId)
->limit(1), array($feedback, 'push'));
//评论完成后的接口，一般用于评论提醒插件
$feedback->pluginHandle()->finishComment($feedback);

// 返回评论数据
$data = array(
    'cid' => $feedback->cid,
    'coid' => $feedback->coid,
    'parent' => $feedback->parent,
    'mail' => $feedback->mail,
    'url' => $feedback->url,
    'ip' => $feedback->ip,
    'agent' => $feedback->agent,
    'author' => $feedback->author,
    'authorId' => $feedback->authorId,
    'permalink' => $feedback->permalink,
    'created' => $feedback->created,
    'datetime' => $feedback->date->format('Y-m-d H:i:s'),
    'status' => $feedback->status,
);
// 评论内容
ob_start();
$feedback->content();
$data['content'] = ob_get_clean();

$data['avatar'] = Typecho_Common::gravatarUrl($data['mail'], 48, Helper::options()->commentsAvatarRating, NULL, $archive->request->isSecure());
$archive->response->throwJson(array('status'=>1,'comment'=>$data));
}