Ajax 编写Rss阅读器

最新推荐文章于 2020-08-05 09:59:11 发布

wl076

最新推荐文章于 2020-08-05 09:59:11 发布

阅读量1k

点赞数

CC 4.0 BY-SA版权

文章标签： ajax rss function xmlhttprequest null xhtml

本文链接：https://blog.youkuaiyun.com/wl076/article/details/1587440

本文介绍了一个简单的RSS阅读器实现方式，使用JavaScript通过XHConn函数发起GET请求获取RSS源，并解析返回的XML数据来展示RSS频道的标题、链接及各条目的标题、链接和作者等信息。

摘要生成于 C知道，由 DeepSeek-R1 满血版支持，前往体验 >

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title>this is test</title>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<script type="text/javascript">
function XHConn()
{
var xmlhttp, bComplete = false;
try { xmlhttp = new ActiveXObject("Msxml2.XMLHTTP"); }
catch (e) { try { xmlhttp = new ActiveXObject("Microsoft.XMLHTTP"); }
catch (e) { try { xmlhttp = new XMLHttpRequest(); }
catch (e) { xmlhttp = false; }}}
if (!xmlhttp) return null;
this.connect = function(sURL, sMethod, sVars, fnDone)
{
    if (!xmlhttp) return false;
    bComplete = false;
    sMethod = sMethod.toUpperCase();

    try {
      if (sMethod == "GET")
      {
        xmlhttp.open(sMethod, sURL+ ((sURL.indexOf("?")==-1)? "?":"&") +sVars, true);
        sVars = "";
      }
      else
      {
        xmlhttp.open(sMethod, sURL, true);
        xmlhttp.setRequestHeader("Method", "POST "+sURL+" HTTP/1.1");
        xmlhttp.setRequestHeader("Content-Type",
          "application/x-www-form-urlencoded");
      }
      xmlhttp.onreadystatechange = function(){
        if (xmlhttp.readyState == 4 && !bComplete)
        {
          bComplete = true;
          fnDone(xmlhttp);
        }};
      xmlhttp.send(sVars);
    }
    catch(z) { return false; }
    return true;
};
return this;
}

function readRSS(url) {
var myConn = new XHConn();
if (!myConn) {alert("error");return;}
myConn.connect(url, "GET", "", ResultSet);
}

var ResultSet = function(obj)
{
    var results = obj.responseXML;
    var title = null;
    var item = null;
    var link=null;
    var author=null;
    var pubDate=null;
    var description=null;
    //得到channel
     var headtitle=results.selectSingleNode("rss/channel/title").text;
     var headlink=results.selectSingleNode("rss/channel/link").text;
     var cell = document.createElement("div");
        cell.innerHTML="<h1><a href="+headlink+" target=_blank>"+headtitle+"</a></h1><br/>";
        document.getElementById("result").appendChild(cell);
       //得到items
    var items = results.selectNodes("rss/channel/item");
    for(var i = 0; i < items.length; i++) {
        item = items[i];
        link=item.getElementsByTagName("link")[0].firstChild.nodeValue;
        title = item.getElementsByTagName("title")[0].firstChild.nodeValue;
        pubDate= item.getElementsByTagName("pubDate")[0].firstChild.nodeValue;
  author= item.getElementsByTagName("dc:creator")[0].firstChild.nodeValue;
       // description=item.getElementsByTagName("description")[0].firstChild.nodeValue;
        var cell = document.createElement("div");
        cell.innerHTML="<a href="+link+" target=_blank>"+title+"</a><font color=red>&nbsp &nbsp &nbsp作者:</font>"+author+"<br/>";


       document.getElementById("result").appendChild(cell);
       //var cell1=document.createElement("div");
       //cell1.innerHTML=description;
       // document.getElementById("result").appendChild(cell1);
    }