61 lines
1.8 KiB
Java
61 lines
1.8 KiB
Java
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Working with images
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package com.ack.web.servlet;
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import java.io.IOException;
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import java.io.InputStream;
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import java.net.URL;
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import java.net.URLConnection;
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import javax.servlet.ServletException;
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import javax.servlet.ServletOutputStream;
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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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public class WorkingWithImages extends HttpServlet {
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private int counter;
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public void doGet( HttpServletRequest req, HttpServletResponse res )
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throws ServletException, IOException {
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ServletOutputStream os = res.getOutputStream();
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res.setContentType( "image/bmp" );
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// where possible, tell the client how big the file is
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res.setContentLength( 3936256 );
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// get resource as a url
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URL resourceUrl = getServletContext().getResource( "/images/large.bmp" );
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if( resourceUrl == null ) {
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res.sendError( HttpServletResponse.SC_NOT_FOUND );
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return;
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}
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// open connection to resource
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URLConnection con = null;
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try {
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con = resourceUrl.openConnection();
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con.connect();
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}
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catch( IOException ioe ) {
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res.sendError( HttpServletResponse.SC_INTERNAL_SERVER_ERROR,
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"unable to read resource: /images/large.bmp" );
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}
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// send resource contents back down output stream
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try {
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InputStream is = con.getInputStream();
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byte[] buf = new byte[8096];
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int bytesRead;
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while( ( bytesRead = is.read( buf ) ) != -1 ) {
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os.write( buf, 0, bytesRead );
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}
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}
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catch( IOException ioe ) {
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res.sendError( HttpServletResponse.SC_INTERNAL_SERVER_ERROR,
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"unable to send resource to client: /image/large.bmp" );
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}
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}
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}
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