Pass parameter to GWT nocache.js from external web portal

Question

I have created a GWT widget with root container ID "widgetContainer" and the corresponding compiled file is gwtwidget.nocache.js. I have created a war file of this widget and hosted in a local server localhost:8888/gwtwidget.

I created another jsp application and the index.jsp is as follow: (Integrated GWT module into JSP application)

<html>
<head>
    <script type="text/javascript" language="javascript" src="http://localhost:8888/gwtwidget/gwtwidget/gwtwidget.nocache.js?appId=461333815262909&appId=461333815262909&appId=461333815262909&appId=461333815262909"></script>
</head>
<body>
    <div id="widgetContainer"></div>
</body>
</html>

I want to retrieve the parameters which are passed through the nocache.js file from the JSP application. For this purpose, I'm using the code

public static native String getParameter( String moduleName, String parameterName ) /*-{
var search = "/" + moduleName + ".nocache.js";
var scripts = $doc.getElementsByTagName( "script" );
for( var i = 0; i < scripts.length; ++i ) {
    if( scripts[ i ].src != null && scripts[ i ].src.indexOf( search ) != -1 ) {
        var parameters = scripts[ i ].src.match(/\w+=\w+/g);
        for( var j = 0; j < parameters.length; ++j ) {
            var keyvalue = parameters[ j ].split( "=" );
            if( keyvalue.length == 2 && keyvalue[ 0 ] == parameterName ) {
                return unescape( keyvalue[ 1 ] );
            }
        }
    } 
}
return null;
}-*/;

But unable to get the parameter values into the GWT widget. Can any one please help me in solving this problem?

Thanks in advance.

score 2 · Accepted Answer · edited May 23 '17 at 11:55

If you want pass parameters using query string, it is not straight forward. There are ways to that. You can refer the following posts:

There is another way, which I feel is simpler. You can set a cookie in your jsp file. You can read the cookie in your GWT module.

<html>
<head>
<script type="text/javascript">
    document.cookie="appId=461333815262909"
</script>
    <script type="text/javascript" language="javascript" src="http://localhost:8888/gwtwidget/gwtwidget/gwtwidget.nocache.js"></script>
</head>
<body>
    <div id="widgetContainer"></div>
</body>
</html>

You can access the cookie 'appId' in your GWT module as:

String param = Cookies.getCookie("appId");

Pass parameter to GWT nocache.js from external web portal

1 Answers1