Question

How do I pass a hidden field value from one application(html) page to GWT page? Access them in destination i.e. GWT PAGE , both pages in different application

My html page contains a hidden field value. I want to transfer that hidden field value in to another page(GWT page) which is located in http://localhost:8080/gwtApp so that GWT page can access that hidden field .

Description: Hidden fields present in html page, in that page when I click button “send” then page redirected to different app (GWT app : http://localhost:8080/gwtApp). Call made to GWT app. Now I want to access that hidden fields present in 1st html page.

I tried DOM.getElementById("myID")).getValue() and got Unable to get hidden field

I am stuck in this issue.

• Any servlet needed in between these pages to access hidden fields ?

• Is there any way to access hidden field in child page(GWT page) from parent page (html) ?

• Is there any relation between both pages html and GWT page(basically html) ? parent-child ?

Any help or guidance in this matter would be appreciated.

Answer 1

Using Iframe we can solve this problem

1] Add destination html file in source html file using iframe.

<FORM name='formName' method='post' action='YourServlet'>    
<input id="hiddenId" type=hidden    name="hiddenId" value="">
<IFRAME  id="iframeId" name="desthtml"  src="http://localhost:8080/gwtApp/GWTRedirect.html" 
 width="100%" height="100%" style="padding-top: 10px" 
 frameborder="0" scrolling="no">                     
</IFRAME>
<FORM >

2] In Your servlet read your html using

org.enhydra.xml.xmlc.XMLObjectImpl doc = getXmlcPage(String htmlFileName);
Element hiddenElement = doc.getElementById("hiddenId");
        hiddenElement.setAttribute("value",1234));

3] access hidden fields on GWTRedirect.html using

<INPUT TYPE='hidden' value='' id='hiddenId' name='hiddenId'> 
<SCRIPT type="text/javascript" language="javascript">
document.getElementById("hiddenId").value =  window.parent.document.getElementById("hiddenId");
</SCRIPT>