I have a servlet in an GWT app thats creates a PDF file with the data given with the post request and sends the responst back:
public void service(HttpServletRequest request, HttpServletResponse response) {
try {
String text = request.getParameter("text");
if (text == null || text.trim().length() == 0) {
text = "no data";
}
//PDF Creation with iText
Document document = new Document();
ByteArrayOutputStream b = new ByteArrayOutputStream();
PdfWriter.getInstance(document, b);
document.open();
document.add(new Paragraph(text));
document.close();
response.setHeader("Expires", "0");
response.setHeader("Cache-Control",
"must-revalidate, post-check=0, pre-check=0");
response.setHeader("Pragma", "public");
response.setContentType("application/pdf");
response.setContentLength(b.size());
OutputStream os = response.getOutputStream();
b.writeTo(os);
os.flush();
os.close();
} catch (Exception ex) {
System.out.println(ex.toString());
}
}
I want to show the created PDF to the User. I got this far on the client:
final RequestBuilder rb = new RequestBuilder(RequestBuilder.POST,
GWT.getModuleBaseURL() + "PdfServlet");
rb.setHeader("Content-type", "application/x-www-form-urlencoded");
StringBuffer postData = new StringBuffer();
postData.append(URL.encode("text")).append("=")
.append(URL.encode(Text));
rb.setRequestData(postData.toString());
rb.setCallback(new RequestCallback() {
@Override
public void onResponseReceived(Request request,
Response response) {
if (200 == response.getStatusCode()) {
//What to do here?
} else {
//TODO:Something
}
}
@Override
public void onError(Request request, Throwable exception) {
/TODO:...
}
});
try {
rb.send();
} catch (RequestException e) {
e.printStackTrace();
}
So my question is: How do I show this PDF to the user? All i managaged to do is show the pdf with "no data" in it..
Thank you for you help :)