Gwt RequestBuilder + Servlet issue

[Praveen Ramachandran]

HI,

I am using a RequestBuilder object from Gwt to send a innerHtml string
from a panel to generate a PDF report in the servlet

SomeWhat like this:
RequestBuilder rb = new RequestBuilder("RequestBuilder.POST","URL");
rb.sendRequestData ("Some String");

So the servlet is some class which extends HttpServlet.

I am able to see that the Request is invoking the Servlet , but some
how it is neither opening an inline window or any attachment.
And there are no exceptions caught at the console. Can you please
suggest me how to go about it

Many thanks for the time

[Uemit]

So you want to send some data to the servlet and want to display a PDF (which is generated by the servlet based on the data sent) in the browser?

There are two ways of how to do it: 

1.) Using RequestBuilder you could generate a AJAX call to your Servlet (as you did it). However in the callback method of the RequestBuilder you will get the response from the servlet (probably the PDF binary data) and then you could use that to open a new window with the binary PDF data.

however I think the easier approach is the following:

2.) Have either a form or a URL which points to the URL of the servlet responsible for generating the PDF. The data you want to pass to the servlet can bei either passed by POST (form) or GET (url) and in the servlet make sure that response headers are set properly (application/PDF). 

second appraoch is easier. 

[suresh babu]

use Window.open("/pdfUrl",  "_blank", "");  in gwt to call the servlet, in servlet write the code for generating pdf.

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Regards
Suresh Babu G

[Abduxkur Ablimit]

try this

        export.addClickHandler(new ClickHandler(){
            public void onClick(ClickEvent event) {
                String link = GWT.getModuleBaseURL() + "exportServlet?year="+year.getValue(year.getSelectedIndex())+"&month="+month.getValue(month.getSelectedIndex());
                Window.Location.replace(link);
            }
        });

because using Ajax request to download file is not possible.

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From: Praveen Ramachandran <prave...@gmail.com>
To: Google Web Toolkit <google-we...@googlegroups.com>
Cc: prave...@gmail.com
Sent: Friday, September 2, 2011 8:40 PM
Subject: Gwt RequestBuilder + Servlet issue

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