package org.appfuse.webapp.filter;
import java.io.IOException;
import java.io.OutputStreamWriter;
import java.io.PrintWriter;
import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpServletResponseWrapper;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
public class GZIPResponseWrapper extends HttpServletResponseWrapper {
private static Log log = LogFactory.getLog(GZIPResponseWrapper.class);
protected HttpServletResponse origResponse = null;
protected ServletOutputStream stream = null;
protected PrintWriter writer = null;
protected int error = 0;
public GZIPResponseWrapper(HttpServletResponse response) {
super(response);
origResponse = response;
}
public ServletOutputStream createOutputStream() throws IOException {
return (new GZIPResponseStream(origResponse));
}
public void finishResponse() {
try {
if (writer != null) {
writer.close();
} else {
if (stream != null) {
stream.close();
}
}
} catch (IOException e) {
}
}
public void flushBuffer() throws IOException {
stream.flush();
}
public ServletOutputStream getOutputStream() throws IOException {
if (writer != null) {
throw new IllegalStateException("getWriter() has already been called!");
}
if (stream == null) {
stream = createOutputStream();
}
return (stream);
}
public PrintWriter getWriter() throws IOException {
if (this.error == HttpServletResponse.SC_FORBIDDEN) {
return super.getWriter();
}
if (writer != null) {
return (writer);
}
if (stream != null) {
throw new IllegalStateException("getOutputStream() has already been called!");
}
stream = createOutputStream();
writer =
new PrintWriter(new OutputStreamWriter(stream,
origResponse.getCharacterEncoding()));
return (writer);
}
public void setContentLength(int length) {
}
public void sendError(int error, String message) throws IOException {
super.sendError(error, message);
this.error = error;
if (log.isDebugEnabled()) {
log.debug("sending error: " + error + " [" + message + "]");
}
}
}