软院通知RSS(附代码) at 多多居

ponyfish的那个通配符很难设，于是自己用PHP写了一个
两个订阅地址，择一即可：
http://www.JerryHong.com/SSE_RSS/
这个反应比较慢（其实是定位到index.php的），但肯定是最新的
http://www.JerryHong.com/SSE_RSS/index.xml
这个反应很快（xml文件嘛），但要有人访问了上面那个地址这个xml文件才会被更新

改进空间：
1.让index.php也直接返回xml中的内容，而从sse官方获取最新通知的动作由ajax或IFrame来触发，但是rss阅读器应该不会支持这两种……
2.怎么才能统计订阅数？是不是统计每天有阅读活动的读者数量？在统计每天有阅读活动的读者数量时要不要记录IP来判断是不是今天已经阅读过了？

<?php
/**
* Class name: RSS
* Author : LeadStar Team
* website : http://www.leadstar.com.cn/
* CopyRight : LeadStar Team
*/
if (defined('_CLASS_RSS_PHP')) return;
define('_CLASS_RSS_PHP',1);
define('REFRESH_TIME',3*60*60);//刷新时间，单位秒
class RSS {
//public
var $rss_ver = "2.0";
var $channel_title = 'Tongji SSE RSS';
var $channel_link = 'http://www.JerryHong.com/SSE_RSS';
var $channel_description = '';
var $language = 'zh_CN';
var $copyright = '';
var $webMaster = '';
var $pubDate = '';
var $lastBuildDate = '';
var $generator = 'JerryHong RSS Generator';
var $content = '';
var $items = array();
/**************************************************************************/
// 函数名: RSS
// 功能: 构造函数
// 参数: $title
// $link
// $description
/**************************************************************************/
function RSS($title, $link, $description) {
$this->channel_title = $title;
$this->channel_link = $link;
$this->channel_description = $description;
$this->pubDate = Date('Y-m-d H:i:s',time());
$this->lastBuildDate = Date('Y-m-d H:i:s',time());
}
/**************************************************************************/
// 函数名: AddItem
// 功能: 添加一个节点
// 参数: $title
// $link
// $description $pubDate
/**************************************************************************/
function AddItem($title, $link, $description ,$pubDate) {
$this->items[] = array('title' => $title ,
'link' => $link,
'description' => $description,
'pubDate' => $pubDate);
}
/**************************************************************************/
// 函数名: BuildRSS
// 功能: 生成rss xml文件内容
/**************************************************************************/
function BuildRSS() {
$s = "<?xml version=\"1.0\" encoding=\"gb2312\" ?>
<rss version=\"2.0\"\n
xmlns:content=\"http://purl.org/rss/1.0/modules/content/\"
xmlns:wfw=\"http://wellformedweb.org/CommentAPI/\"
xmlns:dc=\"http://purl.org/dc/elements/1.1/\">";
// start channel
$s .= "<channel>\n";
$s .= "<title>$this->channel_title</title>\n";
$s .= "<link>$this->channel_link</link>\n";
$s .= "<description>$this->channel_description</description>\n";
$s .= "<language>{$this->language}</language>\n";
if (!empty($this->copyright)) {
$s .= "<copyright>$this->copyright</copyright>\n";
}
if (!empty($this->webMaster)) {
$s .= "<webMaster>$this->webMaster</webMaster>\n";
}
if (!empty($this->pubDate)) {
$s .= "<pubDate>{$this->pubDate}</pubDate>\n";
}
if (!empty($this->lastBuildDate)) {
$s .= "<lastBuildDate>{$this->lastBuildDate}</lastBuildDate>\n";
}
if (!empty($this->generator)) {
$s .= "<generator>{$this->generator}</generator>\n";
}
// start items
for ($i=0;$i<count($this->items);$i++) {
$s .= "<item>\n";
$s .= "<title>{$this->items[$i]['title']}</title>\n";
$s .= "<link>{$this->items[$i]['link']}</link>\n";
$s .= "<description>{$this->items[$i]['description']}</description>\n";
$s .= "<pubDate>{$this->items[$i]['pubDate']}</pubDate>\n";
$s .= "</item>\n";
}
// close channel
$s .= "</channel>\n</rss>";
$this->content = $s;
}
/**************************************************************************/
// 函数名: Show
// 功能: 将产生的rss内容直接打印输出
/**************************************************************************/
function Show() {
if (empty($this->content)) $this->BuildRSS();
echo($this->content);
}
/**************************************************************************/
// 函数名: SaveToFile
// 功能: 将产生的rss内容保存到文件
// 参数: $fname 要保存的文件名
/**************************************************************************/
function SaveToFile($fname) {
$handle = fopen($fname, 'wb');
if ($handle === false) return false;
fwrite($handle, $this->content);
fclose($handle);
}
}
header('Content-Type: text/xml');
//http://www.ponyfish.com/feeds/28267doyQWCrC
//http://sse.tongji.edu.cn
//(.*)<td width=\"70\">(.*)</td>
function getContent($url) {
$file = fopen($url, 'r');
if(!$file)
{
return 0;
}
$content = "";
while (!feof ($file)) {
$content.= fgets ($file, 1024);
}
return $content;
}
//流程开始
$needRefresh = false;
$xmlContent = getContent('index.xml');
if(!$xmlContent)
{
$needRefresh = true;
}
//取得访问次数
else
{
preg_match('/已被访问(\d*)次/s', $xmlContent, $countt);
$count = $countt[1];
if(!$count)
$count=1;
$count++;
$xmlContent = preg_replace('/已被访问(\d*)次/i', '已被访问'.$count.'次', $xmlContent);
//取得上次刷新时间
preg_match('/<lastBuildDate>(.*?)<\/lastBuildDate>/s', $xmlContent, $lastRefreshh);
$lastRefresh = strtotime($lastRefreshh[1]);
$now = time();
if($now-$lastRefresh>=REFRESH_TIME)
$needRefresh = true;
else
$needRefresh = false;
}
//如果离上次刷新时间不超过REFRESH_TIME，就把xml文件的内容呈现出去，并更新xml文件（目的是更新访问次数……）
if(!$needRefresh)
{
echo $xmlContent;
$file = fopen('index.xml', 'w');
fwrite($file, $xmlContent);
fclose($file);
exit();
}
else
{
//否则从远端获取资料并刷新xml文件
$lastRefresh = Date('Y-m-d H:i:s',time());
$rss = new RSS('sseRSS', 'http://www.JerryHong.com/SSE_RSS', '软院新闻订阅源 by www.JerryHong.com 已被访问'.$count.'次上次更新时间'.$lastRefresh);
$line = getContent('http://sse.tongji.edu.cn/');
if (preg_match ('/(.*?)/s', $line, $newsPart)) {
$newses = $newsPart[1];
}
//get each news from $newses
preg_match_all ('/<td width=\"270\">.*?<\/td>.*?<td width=\"70\">.*?<\/td>/s', $newses, $everynews);
foreach($everynews[0] as $news)
{
preg_match('/(\/web.*?)\"/s', $news, $linkk);
$link = $linkk[1];
$link = "http://sse.tongji.edu.cn".$link;
$link = htmlspecialchars($link);
preg_match('/none\">(.*)<\/a>/s', $news, $titlee);
$title = $titlee[1];
$title = trim($title);
$title = htmlspecialchars($title);
$title = substr($title, 0, strrpos($title, '['));
/*
$description = getContent($link);
preg_match('/TEXT-ALIGN: left\">(.*)<\/Textarea>/', $description, $descriptionn);
$description = $descriptionn[1];
*/
preg_match('/\d\d-\d-\d\d|
\d\d-\d\d-\d\d|
\d\d-\d-\d|
\d\d-\d-\d\d/', $news, $datee);
$date = $datee[0];
$rss->AddItem($title, $link, $description, $date);
}
$rss->BuildRSS();
$rss->Show();
$rss->SaveToFile('index.xml');
}
?>

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软院通知RSS(附代码)

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