Dear all,
I came across a caching problem while developing open social
applications.
I included a .js file like this in my widget xml file:
<script src="host/bogusWidget.js"></script>
Every time I changed some code on bogusWidget.js file, the change
wasn't immediatly reflected so I needed to wait for the cached request
to clear.
This is the workaround I build for this, maybe it can help others with
the same problem.
Here's a complete widget definition including a bogusWidget,js file
that never gets cached:
<?xml version="1.0" encoding="UTF-8"?>
<Module>
<ModulePrefs title="Bogus Widget">
<Require feature="opensocial-0.7"/>
</ModulePrefs>
<Content type="html">
<![CDATA[
<script>
function include_dom(script_filename) {
var html_doc = document.getElementsByTagName('head').item(0);
var js = document.createElement('script');
js.setAttribute('language', 'javascript');
js.setAttribute('type', 'text/javascript');
js.setAttribute('src', script_filename);
html_doc.appendChild(js);
return false;
};
function includeScript(url) {
var refreshInterval=0;
var ts = new Date().getTime();
var sep = "?";
if (refreshInterval && refreshInterval > 0) {
ts = Math.floor(ts / (refreshInterval * 1000));
}
if (url.indexOf("?") > -1) {
sep = "&";
}
url = [ url, sep, "nocache=", ts ].join("");
include_dom(url);
}
includeScript("host/bogusWidget.js"); //Use this function
instead of <script src="host/bogusWidget.js">
</script>
<script>
gadgets.util.registerOnLoadHandler(init); //Calling init
method defined somewhere in bogusWidget.js file
</script>
]]>
</Content>
</Module>
I hope this helps, its a solution mixing some DOM manipulation and the
caching workround found in the API documentation for
gadgets.io.makeRequest() return values.
Best regards,
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