Sending powerpoint in the response object FAILS

Aspose.Slides Product Family
1

hi
I am using aspose slides to generate a powerpoint in my web application.
I need to send the powerpoint to the client in the response object.
However, when i do so…the application fails to write the file, if the generated powerpoint is greater than 5Mb …

I am using the below mentioned code to send the powerpoint in the response

response.setContentType(“application/vnd.ms-powerpoint”);
String companyname=combean.getCompanyname();
String attachment=“Attachment;filename=”+companyname+"_"+user.getFirstname()+" “+user.getLastname()+”.ppt";

response.setHeader(“Content-Disposition”, attachment);
File file = new File(finalPresentationFileName);
fis = new FileInputStream(file);
out = response.getWriter();
int i;
while ((i = fis.read()) != -1) {
out.write(i);
}

response.flushBuffer();


Please reply ASAP.
Thanks

2

Dear vamsee,

Thanks for using Aspose.Slides for JAVA.

Thanks for reporting, we will look into this problem and fix it.

3

Still waiting for a response…
can someone please help…its critical…
needs to be fixed asap.

4

That is definitely not a problem of Aspose.Slides. There is something with you code or server settings.
Did you check our Northwind for Java demo? Try to use code from this application.

5

Hi

I tried the Northwind application,…it is not working for multiple users .
I get a null pointer exception for all users except one…
So if multiple users access the app simultaneously…it is generating the powerpoint for one user at a time

I followed the steps given in the readme file.

Please help…


6

Which version of Aspose.Slides for JAVA you are using? Try other versions and let me know if problem persists?

7

Try this code, it is working quite fine here with simultaneous mutiple requests. I have also attached the full sevlet code in a text file. I have used Aspose.Slides for JAVA 1.8.2.0

---------------------------------------------------

try

{

Random rand = new Random();

int randI=rand.nextInt(1000);

//Presentation pres=new Presentation();

response.setContentType("application/vnd.ms-powerpoint");

String companyname="CompanyName";

String attachment="attachment;filename=abc" + randI +".ppt";

response.setHeader("Content-Disposition", attachment);

File file = new File("d:\\downloads\\argument.ppt");

FileInputStream fis = new FileInputStream(file);

PrintWriter out = response.getWriter();

int i;

while ((i = fis.read()) != -1) {

out.write(i);

}

fis.close();

out.close();

}

catch(Exception ex)

{

}

8

hi

I tried the code u have sent. It works fine when the powerpoint size is less than 5 mb for multiple users.
If the powerpoint size increases beyond 5MB…i am getting the following error when multiple users try to access.

Mar 10, 2008 4:39:06 PM org.apache.catalina.core.StandardWrapperValve invoke
SEVERE: Servlet.service() for servlet action threw exception
java.lang.OutOfMemoryError: Java heap space


Please suggest …how to fix this.