54 lines
1.6 KiB
Java
54 lines
1.6 KiB
Java
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Buffering servlet responses
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package com.ack.web.servlet;
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import java.io.IOException;
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import java.io.PrintWriter;
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import javax.servlet.ServletException;
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import javax.servlet.http.HttpServlet;
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import javax.servlet.http.HttpServletRequest;
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import javax.servlet.http.HttpServletResponse;
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/**
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*
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*/
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public class BufferingServletResponses extends HttpServlet {
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public void doGet( HttpServletRequest req, HttpServletResponse res )
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throws ServletException, IOException {
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res.setContentType( "text/html" );
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PrintWriter pw = res.getWriter();
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// create 32K buffer
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res.setBufferSize( 32 * 1024 );
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pw.println( "everything we send now is buffered " );
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pw.println( "at the server until we reach the " );
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pw.println( "buffer size limit or we do a flush!" );
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// check to see if anything has been sent to the client
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if( res.isCommitted() ) {
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pw.println( "<br>damned, something has been sent" );
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}
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else {
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// clear the buffer, so what has gone before is lost
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res.resetBuffer();
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pw.println( "we are going to clear this as well" );
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// clears buffer, status codes and headers
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res.reset();
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// we've blanked the ContentType header so lets add it back
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res.setContentType( "text/html" );
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pw.println( "<br>but we are going to see this" );
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}
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// send what we have now
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res.flushBuffer();
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pw.println( "<br>and this will get flushed at the end of the method" );
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pw.println( "<br>current response buffer size is: " + res.getBufferSize() );
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}
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}
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