Cache Problem while loading PDF in IE

Question

Hi,
I am getting a problem when I load a PDF from my servlet.
I am using the following code.
pdfInputStream = httpURLConnection.getInputStream();
output = aResponse.getOutputStream();
aResponse.setContentType("application/pdf");
byte[] buffer = new byte[1024];
int bytesRead = 0;
while((bytesRead = pdfInputStream.read(buffer, 0, buffer.length)) >0) {
output.write(buffer, 0, bytesRead);
It works fine in Netscape. In IE it gives a problem when the PDF is very small 5KB and less. It does not show the report. When I click reload it shows it then.
When I make the browser cache setting to "Every visit to page". It works fine.
Then I tried to disable the cache for IE using the following code but this does not work in IE.
pdfInputStream = httpURLConnection.getInputStream();
output = aResponse.getOutputStream();
aResponse.setContentType("application/pdf");
aResponse.setHeader("Cache-Control", "no-cache"); //or
aResponse.setHeader("Pragma", "no-cache"); //or
aResponse.setDateHeader("Expires", 0);
byte[] buffer = new byte[1024];
int bytesRead = 0;
while((bytesRead = pdfInputStream.read(buffer, 0, buffer.length)) >0) {
output.write(buffer, 0, bytesRead);
Each of the above methods did not work. IE was not recognising it as pdf any more and showing the save file box.
Anybody have any solutions for this. There was another query of this kind but no answers for that.
Regards,
Ritesh

Answer 1

This is not a cache problem.
With IE you must specify the PDF content length you sent to browser.
So:
You must add aResponse.setContentLength(bytesTotal); where bytesTotal is the length of data sent to browser.