Monday, June 30, 2008
Simple RSS Reader
<html> <title>RSS Reader</title> <head> <script language="JavaScript">
var xmlHttp = null; var t_channel = 'channel'; var t_title = 'title'; var t_link = 'link'; var t_description = 'description';
var t_pubDate = 'pubDate' var t_lastBuildDate = 'lastBuildDate'
var t_item = 'item';
var t_tableHTML;
var objChannelNodeList;
// messages var NOT_A_VALID_RSS_FEED = 'Not a valid RSS Feed'; var GOT_ERROR = 'Got error please try again'; var GETTING_DATA = 'Getting Data Please wait';
// colors var CLR_PROCESSING="orange"; var CLR_ERROR="red"; var CLR_SUCCESS="green"; var CLR_BORDER="skyblue";
function getFirstChildText(objNode,tag){ if(objNode.getElementsByTagName(tag).length>0){ return objNode.getElementsByTagName(tag)[0].firstChild.nodeValue; }else{ return ' '; } }
function getRSSData(){ try{ if(xmlHttp.readyState==4){ t_tableHTML = '<table cellspacing="0" cellpadding="3" border="1" bordercolor='+CLR_BORDER+'>'; var resXML = xmlHttp.responseXML; if(!resXML){ throw NOT_A_VALID_RSS_FEED; } var objChannelNodeList = resXML.getElementsByTagName(t_channel); if(objChannelNodeList.length==0){ throw NOT_A_VALID_RSS_FEED; }
for(i=0;i<objChannelNodeList.length;i++){
var titleText = getFirstChildText(objChannelNodeList[i],t_title); var linkText = getFirstChildText(objChannelNodeList[i],t_link); var descText = getFirstChildText(objChannelNodeList[i],t_description); var publishDate = getFirstChildText(objChannelNodeList[i],t_pubDate); if(publishDate==''){ publishDate = getFirstChildText(objChannelNodeList[i],t_lastBuildDate); } if(publishDate!=''){ titleText = titleText + '[ <font color='+CLR_SUCCESS+'>' + publishDate + '</font> ]'; } constructRows(titleText,linkText,descText); for(j=0;j<objChannelNodeList[i].getElementsByTagName(t_item).length;j++){ var itemTitleText = getFirstChildText(objChannelNodeList[i].getElementsByTagName(t_item)[j],t_title); var itemLinkText = getFirstChildText(objChannelNodeList[i].getElementsByTagName(t_item)[j],t_link); var itemDescText = getFirstChildText(objChannelNodeList[i].getElementsByTagName(t_item)[j],t_description); constructRows(itemTitleText,itemLinkText,itemDescText);
}// end of : item for }// end of channel for
t_tableHTML = t_tableHTML + '</table>';
setText(t_tableHTML);
}else{// end of xml http ready state gettingDataPleaseWait(xmlHttp.readyState); } }catch(e){ gotErrorPleaseTry(e); } } function gettingDataPleaseWait(state){ t_tableHTML = '<table cellspacing="0" cellpadding="0" border="0">'; var t_txtMsg = GETTING_DATA; for(msgDots=0;msgDots<state;msgDots++){ t_txtMsg = t_txtMsg + ' ...'; } t_tableHTML = t_tableHTML + '<tr><td><font color='+CLR_PROCESSING+'>' + t_txtMsg + '</font></td></tr>'; t_tableHTML = t_tableHTML + '</table>';
setText(t_tableHTML); } function gotErrorPleaseTry(e){ t_tableHTML = '<table cellspacing="0" cellpadding="0" border="0">'; t_tableHTML = t_tableHTML + '<tr><td><font color='+CLR_ERROR+'>'; if(e){ if(e.message){ t_tableHTML = t_tableHTML + GOT_ERROR + ' [<b>' + e.message + '</b>]'; }else{ t_tableHTML = t_tableHTML + GOT_ERROR + ' [<b>' + e + '</b>]'; } }else{ t_tableHTML = t_tableHTML + GOT_ERROR; } t_tableHTML = t_tableHTML + '</font></td></tr>'; t_tableHTML = t_tableHTML + '</table>';
setText(t_tableHTML); } function constructRows(itemTitleText,itemLinkText,itemDescText){ t_tableHTML = t_tableHTML + '<tr>'; t_tableHTML = t_tableHTML + '<td><a href="' + itemLinkText + '">' + itemTitleText + '</a></td>'; if(!document.theForm.chkDebug.checked){ // trim images var t_tempDes = new String(itemDescText); itemDescText = t_tempDes.replace('<img','<imge'); }
t_tableHTML = t_tableHTML + '<td>' + itemDescText + '</td>'; t_tableHTML = t_tableHTML + '</tr>'; } function setText(strHtmlText){
document.getElementById('DisplayArea').innerHTML=''; document.getElementById('DisplayArea').innerHTML=strHtmlText;
} function startProcess() { try{ gettingDataPleaseWait(1); var runningUserAgent = new String(navigator.userAgent);
var URL=''; if(document.theForm.selURL.selectedIndex>0){ URL = document.theForm.selURL[document.theForm.selURL.selectedIndex].value; }else{ URL = document.theForm.txtURL.value; } // append some random number to avoid cache if(URL!=''){ URL = new String(URL) var curDate = new Date(); if(URL.indexOf("?")!=-1){ URL = URL + '&date=' + curDate.getTime(); }else{ URL = URL + '?date=' + curDate.getTime(); } }else{ throw 'Invalid URL' }
if(runningUserAgent.indexOf('MSIE')!=-1){//IE xmlHttp=new ActiveXObject("Msxml2.XMLHTTP"); if(!xmlHttp){ xmlHttp=new ActiveXObject("Microsoft.XMLHTTP"); } } else if(runningUserAgent.indexOf('Firefox')!=-1){ netscape.security.PrivilegeManager.enablePrivilege("UniversalBrowserRead"); xmlHttp=new XMLHttpRequest(); }else{ throw 'Currently supports only IE or Firefox' }
xmlHttp.open("GET",URL,true); xmlHttp.send(null);
if(xmlHttp!=null){ xmlHttp.onreadystatechange=getRSSData; }
}catch(e){ gotErrorPleaseTry(e) } }// end of : ajaxFunction function </script> </head> <body> <form name="theForm"> <div id="RSS Source Area">
<table cellspacing="0" cellpadding="0" border="0"> <tr> <td align="left"> <select name="selURL"> <option value="">Select RSS Feed</option> <option value="http://www.ibnlive.com/xml/top.xml">IBN Top Stories</option> <option value="http://newsrss.bbc.co.uk/rss/newsonline_uk_edition/latest_published_stories/rss.xml">BBC Latest</option>
<option value="http://www.ndtvprofit.com/RSS/SectionRssfeed.aspx?ts=Markets">NDTV Profit Business</option> </select> </td> <td> or </td> <td><input type="text" name="txtURL"></td> <td> </td> <td>Images : </td>
<td align="left"><input type="checkbox" name="chkDebug" value="1"></td> <td> </td> <td align="left"><input type="button" name="getRSS" value="Get Data" onClick="javaScript:startProcess();"/> </tr> </table> </div> <br/> <div id="DisplayArea"> </div>
</form> </body></html>
var xmlHttp = null; var t_channel = 'channel'; var t_title = 'title'; var t_link = 'link'; var t_description = 'description';
var t_pubDate = 'pubDate' var t_lastBuildDate = 'lastBuildDate'
var t_item = 'item';
var t_tableHTML;
var objChannelNodeList;
// messages var NOT_A_VALID_RSS_FEED = 'Not a valid RSS Feed'; var GOT_ERROR = 'Got error please try again'; var GETTING_DATA = 'Getting Data Please wait';
// colors var CLR_PROCESSING="orange"; var CLR_ERROR="red"; var CLR_SUCCESS="green"; var CLR_BORDER="skyblue";
function getFirstChildText(objNode,tag){ if(objNode.getElementsByTagName(tag).length>0){ return objNode.getElementsByTagName(tag)[0].firstChild.nodeValue; }else{ return ' '; } }
function getRSSData(){ try{ if(xmlHttp.readyState==4){ t_tableHTML = '<table cellspacing="0" cellpadding="3" border="1" bordercolor='+CLR_BORDER+'>'; var resXML = xmlHttp.responseXML; if(!resXML){ throw NOT_A_VALID_RSS_FEED; } var objChannelNodeList = resXML.getElementsByTagName(t_channel); if(objChannelNodeList.length==0){ throw NOT_A_VALID_RSS_FEED; }
for(i=0;i<objChannelNodeList.length;i++){
var titleText = getFirstChildText(objChannelNodeList[i],t_title); var linkText = getFirstChildText(objChannelNodeList[i],t_link); var descText = getFirstChildText(objChannelNodeList[i],t_description); var publishDate = getFirstChildText(objChannelNodeList[i],t_pubDate); if(publishDate==''){ publishDate = getFirstChildText(objChannelNodeList[i],t_lastBuildDate); } if(publishDate!=''){ titleText = titleText + '[ <font color='+CLR_SUCCESS+'>' + publishDate + '</font> ]'; } constructRows(titleText,linkText,descText); for(j=0;j<objChannelNodeList[i].getElementsByTagName(t_item).length;j++){ var itemTitleText = getFirstChildText(objChannelNodeList[i].getElementsByTagName(t_item)[j],t_title); var itemLinkText = getFirstChildText(objChannelNodeList[i].getElementsByTagName(t_item)[j],t_link); var itemDescText = getFirstChildText(objChannelNodeList[i].getElementsByTagName(t_item)[j],t_description); constructRows(itemTitleText,itemLinkText,itemDescText);
}// end of : item for }// end of channel for
t_tableHTML = t_tableHTML + '</table>';
setText(t_tableHTML);
}else{// end of xml http ready state gettingDataPleaseWait(xmlHttp.readyState); } }catch(e){ gotErrorPleaseTry(e); } } function gettingDataPleaseWait(state){ t_tableHTML = '<table cellspacing="0" cellpadding="0" border="0">'; var t_txtMsg = GETTING_DATA; for(msgDots=0;msgDots<state;msgDots++){ t_txtMsg = t_txtMsg + ' ...'; } t_tableHTML = t_tableHTML + '<tr><td><font color='+CLR_PROCESSING+'>' + t_txtMsg + '</font></td></tr>'; t_tableHTML = t_tableHTML + '</table>';
setText(t_tableHTML); } function gotErrorPleaseTry(e){ t_tableHTML = '<table cellspacing="0" cellpadding="0" border="0">'; t_tableHTML = t_tableHTML + '<tr><td><font color='+CLR_ERROR+'>'; if(e){ if(e.message){ t_tableHTML = t_tableHTML + GOT_ERROR + ' [<b>' + e.message + '</b>]'; }else{ t_tableHTML = t_tableHTML + GOT_ERROR + ' [<b>' + e + '</b>]'; } }else{ t_tableHTML = t_tableHTML + GOT_ERROR; } t_tableHTML = t_tableHTML + '</font></td></tr>'; t_tableHTML = t_tableHTML + '</table>';
setText(t_tableHTML); } function constructRows(itemTitleText,itemLinkText,itemDescText){ t_tableHTML = t_tableHTML + '<tr>'; t_tableHTML = t_tableHTML + '<td><a href="' + itemLinkText + '">' + itemTitleText + '</a></td>'; if(!document.theForm.chkDebug.checked){ // trim images var t_tempDes = new String(itemDescText); itemDescText = t_tempDes.replace('<img','<imge'); }
t_tableHTML = t_tableHTML + '<td>' + itemDescText + '</td>'; t_tableHTML = t_tableHTML + '</tr>'; } function setText(strHtmlText){
document.getElementById('DisplayArea').innerHTML=''; document.getElementById('DisplayArea').innerHTML=strHtmlText;
} function startProcess() { try{ gettingDataPleaseWait(1); var runningUserAgent = new String(navigator.userAgent);
var URL=''; if(document.theForm.selURL.selectedIndex>0){ URL = document.theForm.selURL[document.theForm.selURL.selectedIndex].value; }else{ URL = document.theForm.txtURL.value; } // append some random number to avoid cache if(URL!=''){ URL = new String(URL) var curDate = new Date(); if(URL.indexOf("?")!=-1){ URL = URL + '&date=' + curDate.getTime(); }else{ URL = URL + '?date=' + curDate.getTime(); } }else{ throw 'Invalid URL' }
if(runningUserAgent.indexOf('MSIE')!=-1){//IE xmlHttp=new ActiveXObject("Msxml2.XMLHTTP"); if(!xmlHttp){ xmlHttp=new ActiveXObject("Microsoft.XMLHTTP"); } } else if(runningUserAgent.indexOf('Firefox')!=-1){ netscape.security.PrivilegeManager.enablePrivilege("UniversalBrowserRead"); xmlHttp=new XMLHttpRequest(); }else{ throw 'Currently supports only IE or Firefox' }
xmlHttp.open("GET",URL,true); xmlHttp.send(null);
if(xmlHttp!=null){ xmlHttp.onreadystatechange=getRSSData; }
}catch(e){ gotErrorPleaseTry(e) } }// end of : ajaxFunction function </script> </head> <body> <form name="theForm"> <div id="RSS Source Area">
<table cellspacing="0" cellpadding="0" border="0"> <tr> <td align="left"> <select name="selURL"> <option value="">Select RSS Feed</option> <option value="http://www.ibnlive.com/xml/top.xml">IBN Top Stories</option> <option value="http://newsrss.bbc.co.uk/rss/newsonline_uk_edition/latest_published_stories/rss.xml">BBC Latest</option>
<option value="http://www.ndtvprofit.com/RSS/SectionRssfeed.aspx?ts=Markets">NDTV Profit Business</option> </select> </td> <td> or </td> <td><input type="text" name="txtURL"></td> <td> </td> <td>Images : </td>
<td align="left"><input type="checkbox" name="chkDebug" value="1"></td> <td> </td> <td align="left"><input type="button" name="getRSS" value="Get Data" onClick="javaScript:startProcess();"/> </tr> </table> </div> <br/> <div id="DisplayArea"> </div>
</form> </body></html>
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hai, kodali,How r u? this is thangadurai birlasoft sankar friend. keep do it!!! I/we need more post from you!
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