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From Saurav Sarkar <saurav.sark...@gmail.com>
Subject Re: Default Max response size in Tomcat
Date Wed, 20 Mar 2019 14:48:30 GMT
Thanks a lot Olaf for the response.

Yes , i have taken care of that condition

Please find the full code below

protected void doGet(HttpServletRequest request, HttpServletResponse
response)

      throws ServletException, IOException {

try {

    String param = request.getParameter("size");

    if (param != null) {


      int kByte = Integer.parseInt(param);


      response.setContentType("application/octet-stream");



      long length = kByte * 1024;

      if (length <= Integer.MAX_VALUE)

      {

        response.setContentLength((int)length);

      }

      else

      {

        response.addHeader("Content-Length", Long.toString(length));

      }

     // response.setContentLength(kByte * 1024);


      ServletOutputStream outputStream = response.getOutputStream();

      byte[] buffer = new byte[1024];

      Random random = new Random(System.currentTimeMillis());




      while (size < kByte) {

        random.nextBytes(buffer);

        outputStream.write(buffer);

        size += 1;

      }


      outputStream.flush();


      return;

    }

}catch (Exception e) {

e.printStackTrace();

response.sendError(500, e.getMessage());

return;

}

  }

On Wed, Mar 20, 2019 at 6:26 PM Olaf Kock <tomcat@olafkock.de> wrote:

>
>
> On 20.03.19 12:08, Saurav Sarkar wrote:
> > Just to add the stack trace.
> >
> > I am getting ClientAbortException "Connection reset by peer" when i am
> > trying to write to the response stream
> >
> > 2019-03-20T10:32:28.501+0000 [APP/PROC/WEB/0] ERR
> > org.apache.catalina.connector.ClientAbortException: java.io.IOException:
> > Connection reset by peer
> > 2019-03-20T10:32:28.502+0000 [APP/PROC/WEB/0] ERR at
> >
> org.apache.catalina.connector.OutputBuffer.realWriteBytes(OutputBuffer.java:364)
> ...
>
> >
> > On Wed, Mar 20, 2019 at 3:51 PM Saurav Sarkar <saurav.sarkar1@gmail.com>
> > wrote:
> >
> >> Hi All
> >>
> >> I have a very basic test application which serves bytes from memory and
> >> gives it back to the client.
> >>
> >> Whenever i try to send the request for byte size which is of over 2 GB i
> >> get a connection reset error in my server code and a 502 error in my
> chrome
> >> console. Below 2 GB it is working fine.
> >>
> >> In my client side i execute java script which i execute from the
> browser.
> >> This basically executes an XMLHTTPRequest , gets the response (stores in
> >> browser memory) and asks for a save.
> >>
> >> I would like to know if there Is there max response size default value
> >> which is set in default tomcat configuration. ? or any other hints which
> >> you can provide in my use.
> >>
> >>
> >> Thanks and Regards,
> >>
> >> Saurav
> >>
> >> Below is the servlet or server side code
> >>
> >>
> >>
> >>         response.setContentLength((int)length);
> >>
> >>       }
> >>
> >>       else
> >>
> >>       {
> >>
> >>         response.addHeader("Content-Length", Long.toString(length));
> >>
> >>       }
>
> You don't include the initial condition in your code, but I'm assuming
> that the first line is hit: response.setContentLength((int)length);
>
> int in Java is defined to be 32 bit, and always signed. That means that
> any value larger than 2^31 or Integer.MAX_VALUE can't be expressed in
> int as a positive number. In fact, anything between 2^31 and 2^32 will
> be interpreted as a negative number, so you're effectively setting the
> content length to be negative.
>
> Note that there's also a setContentLengthLong method
>
> https://docs.oracle.com/javaee/7/api/javax/servlet/ServletResponse.html#setContentLengthLong-long-
>
>
>
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