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Using the httpRequest object, check the page header to trap the page status. If Domino serves iFramed pages, you can easily support custom applications status codes, if needed.
//helper function
function reGetUrlParameter( name , url ){
//from http://www.netlobo.com
name = name.replace(/[[]/,"\[").
replace(/[]]/,"\]");
var regexS = "[\?&]"+name+"=([^&#]*)";
var regex = new RegExp( regexS );
var results = regex.exec( url );
if( results == null ){
return "";
}else{
return results[1];
}
}
//get the httpRequest object
function getHttprequestObject(){
//from http://www.w3schools.com
var mime = 'text/xml';
if(window.XMLHttpRequest) {
xmlhttp = new XMLHttpRequest();
xmlhttp.overrideMimeType(mime);
}else if(window.ActiveXObject){
xmlhttp = new ActiveXObject("Microsoft.XMLHTTP");
}
}
//check the iframed page and present
something nice if it is not available function checkUrl(){
var params = xmlhttp.getResponseHeader("Set-Cookie");
//these params can be set in a computed for
display field; use @SetHTTPHeader
var releasestatus = reGetUrlParameter
("someparamfromdoc", params);
var pagestatus = xmlhttp.status;
if( pagestatus==200 ){
if( someparamfromdoc=="wrongstate" ){
stattxt = "Iframed page has wrong internal state."
}
}else if( pagestatus==401 ){
stattxt = "Iframed page is not accessable with
your current access right."
}else if( pagestatus==404){
stattxt = "Iframed page has been deleted."
}
if(stattxt != ""){ iframeHtml = stattxt }
document.write( iframeHtml );
}
//just give the url to this function
function startUrlCheck(testUrl){
getHttprequestObject();
xmlhttp.open("HEAD", testUrl, false);
xmlhttp.onreadystatechange = function(){
if (xmlhttp.readyState==4){
checkUrl()
}
}
xmlhttp.send(null);
}
startUrlCheck(iLnk);
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This tip was submitted to the SearchDomino.com tip library by member Steen Grunds. Please let others know how useful it is via the rating scale below. Do you have a useful Lotus Notes, Domino, Workplace or WebSphere tip or code snippet to share? Submit it to our monthly tip contest and you could win a prize.
This was first published in April 2008