net.sf.j2ep
Class UrlRewritingResponseWrapper

java.lang.Object
  HttpServletResponseWrapper
      net.sf.j2ep.UrlRewritingResponseWrapper

public final class UrlRewritingResponseWrapper
extends HttpServletResponseWrapper

A wrapper for the normal HttpServletResponse, based on the content-type either the normal output stream of a wrapped stream will be returned. The wrapped stream can handle rewrite of links found in the source. This class also handles rewriting of the headers Location and Set-Cookie.

Author:

Anders Nyman

Constructor Summary

UrlRewritingResponseWrapper(HttpServletResponse response, Server server, java.lang.String ownHostName, java.lang.String contextPath, ServerChain serverChain)
Basic constructor.

Method Summary

void	addHeader(java.lang.String name, java.lang.String originalValue) Checks if we have to rewrite the header and if so will rewrite it.
ServletOutputStream	getOutputStream() Based on the value in the content-type header we either return the default stream or our own stream that can rewrite links.
java.io.PrintWriter	getWriter() Based on the value in the content-type header we either return the default writer or our own writer.
void	processStream() Rewrites the output stream to change any links.
void	setHeader(java.lang.String name, java.lang.String originalValue) Checks if we have to rewrite the header and if so will rewrite it.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

UrlRewritingResponseWrapper

public UrlRewritingResponseWrapper(HttpServletResponse response,
                                   Server server,
                                   java.lang.String ownHostName,
                                   java.lang.String contextPath,
                                   ServerChain serverChain)
                            throws java.io.IOException

Basic constructor.

Parameters:

response - The response we are wrapping

server - The server that was matched

ownHostName - String we are rewriting servers to

Throws:

java.io.IOException - When there is a problem with the streams

Method Detail

addHeader

public void addHeader(java.lang.String name,
                      java.lang.String originalValue)

Checks if we have to rewrite the header and if so will rewrite it.

See Also:

javax.servlet.http.HttpServletResponse#addHeader(java.lang.String, java.lang.String)

setHeader

public void setHeader(java.lang.String name,
                      java.lang.String originalValue)

Checks if we have to rewrite the header and if so will rewrite it.

See Also:

javax.servlet.http.HttpServletResponse#setHeader(java.lang.String, java.lang.String)

getOutputStream

public ServletOutputStream getOutputStream()
                                    throws java.io.IOException

Based on the value in the content-type header we either return the default stream or our own stream that can rewrite links.

Throws:

java.io.IOException

See Also:

javax.servlet.ServletResponse#getOutputStream()

getWriter

public java.io.PrintWriter getWriter()
                              throws java.io.IOException

Based on the value in the content-type header we either return the default writer or our own writer. Our own writer will write to the stream that can rewrite links.

Throws:

java.io.IOException

See Also:

javax.servlet.ServletResponse#getWriter()

processStream

public void processStream()
                   throws java.io.IOException

Rewrites the output stream to change any links. Also closes all the streams and writers. We need the user to flush and close the streams himself as usual but we can't be sure that the writers created are used by the client and therefor we close them here.

Throws:

java.io.IOException - Is thrown when there is a problem with the streams