Use the JavaScript console in Firebug and run the following script snippet:
var xmlhttp = new XMLHttpRequest();
xmlhttp.open("HEAD", "the_url",true); // Async HEAD request (relative path to avoid cross-domain restrictions)
xmlhttp.onreadystatechange=function() {
if (xmlhttp.readyState==4) { // make sure the request is complete
alert(xmlhttp.getAllResponseHeaders()) // display the headers
}
}
xmlhttp.send(null); // send request
I just invested 30min to find tools/libraries which allow me to use PHP scripts instead of Java on the server when the front end is GWT. There are various potential channels through which GWT and PHP can talk to each other. GWT RPC, ideally native or over JSON/XML would certainly be the most obvious choice.
My Internet search didn’t turn up a whole lot of useful stuff…
http://code.google.com/p/gwtphp/
http://code.google.com/p/gwtamp/
http://code.google.com/p/lacertae/
http://download.boulder.ibm.com/ibmdl/pub/software/dw/xml/x-gwtphp/x-gwtphp-pdf.pdf
