net.sourceforge.statelessfilter.wrappers.headers

Class HeaderBufferedHttpResponseWrapper

java.lang.Object

javax.servlet.ServletResponseWrapper

javax.servlet.http.HttpServletResponseWrapper

net.sourceforge.statelessfilter.wrappers.headers.HeaderBufferedHttpResponseWrapper

All Implemented Interfaces:

javax.servlet.http.HttpServletResponse, javax.servlet.ServletResponse

public class HeaderBufferedHttpResponseWrapper
extends javax.servlet.http.HttpServletResponseWrapper

A custom response wrapper that inject session data before sending content output.

Session data can no longer be modified after the application has started to write to output stream.

This changes slightly the behavior of the container since it would usually prevent session creation in this case, but not session data modifications. However, most frameworks ensure to have updated session and application data BEFORE doing any output. As a result, this wrapper is safe for most uses.

This wrappers uses much less memory than BufferedHttpResponseWrapper since it does not cache the whole response data.

Author:

Nicolas Richeton

Field Summary

Fields inherited from interface javax.servlet.http.HttpServletResponse

SC_ACCEPTED, SC_BAD_GATEWAY, SC_BAD_REQUEST, SC_CONFLICT, SC_CONTINUE, SC_CREATED, SC_EXPECTATION_FAILED, SC_FORBIDDEN, SC_FOUND, SC_GATEWAY_TIMEOUT, SC_GONE, SC_HTTP_VERSION_NOT_SUPPORTED, SC_INTERNAL_SERVER_ERROR, SC_LENGTH_REQUIRED, SC_METHOD_NOT_ALLOWED, SC_MOVED_PERMANENTLY, SC_MOVED_TEMPORARILY, SC_MULTIPLE_CHOICES, SC_NO_CONTENT, SC_NON_AUTHORITATIVE_INFORMATION, SC_NOT_ACCEPTABLE, SC_NOT_FOUND, SC_NOT_IMPLEMENTED, SC_NOT_MODIFIED, SC_OK, SC_PARTIAL_CONTENT, SC_PAYMENT_REQUIRED, SC_PRECONDITION_FAILED, SC_PROXY_AUTHENTICATION_REQUIRED, SC_REQUEST_ENTITY_TOO_LARGE, SC_REQUEST_TIMEOUT, SC_REQUEST_URI_TOO_LONG, SC_REQUESTED_RANGE_NOT_SATISFIABLE, SC_RESET_CONTENT, SC_SEE_OTHER, SC_SERVICE_UNAVAILABLE, SC_SWITCHING_PROTOCOLS, SC_TEMPORARY_REDIRECT, SC_UNAUTHORIZED, SC_UNSUPPORTED_MEDIA_TYPE, SC_USE_PROXY

Constructor Summary

Constructors

Constructor and Description
HeaderBufferedHttpResponseWrapper(StatelessRequestWrapper request, javax.servlet.http.HttpServletResponse origResponse)

Method Summary

Methods

Modifier and Type	Method and Description
void	flushBuffer() javax.servlet.ServletResponseWrapper#flushBuffer()
javax.servlet.ServletOutputStream	getOutputStream() javax.servlet.ServletResponseWrapper#getOutputStream()
PrintWriter	getWriter() javax.servlet.ServletResponseWrapper#getWriter()
void	sendError(int sc) javax.servlet.http.HttpServletResponseWrapper#sendError(int)
void	sendError(int sc, String msg) javax.servlet.http.HttpServletResponseWrapper#sendError(int, java.lang.String)
void	sendRedirect(String location) javax.servlet.http.HttpServletResponseWrapper#sendRedirect(java.lang.

Methods inherited from class javax.servlet.http.HttpServletResponseWrapper

addCookie, addDateHeader, addHeader, addIntHeader, containsHeader, encodeRedirectUrl, encodeRedirectURL, encodeUrl, encodeURL, setDateHeader, setHeader, setIntHeader, setStatus, setStatus

Methods inherited from class javax.servlet.ServletResponseWrapper

getBufferSize, getCharacterEncoding, getContentType, getLocale, getResponse, isCommitted, reset, resetBuffer, setBufferSize, setCharacterEncoding, setContentLength, setContentType, setLocale, setResponse

Methods inherited from class java.lang.Object

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

Methods inherited from interface javax.servlet.ServletResponse

getBufferSize, getCharacterEncoding, getContentType, getLocale, isCommitted, reset, resetBuffer, setBufferSize, setCharacterEncoding, setContentLength, setContentType, setLocale

Constructor Detail

HeaderBufferedHttpResponseWrapper

public HeaderBufferedHttpResponseWrapper(StatelessRequestWrapper request,
                                 javax.servlet.http.HttpServletResponse origResponse)

Method Detail

flushBuffer

public void flushBuffer()
                 throws IOException

javax.servlet.ServletResponseWrapper#flushBuffer()

Specified by:

flushBuffer in interface javax.servlet.ServletResponse

Overrides:

flushBuffer in class javax.servlet.ServletResponseWrapper

Throws:

IOException

getOutputStream

public javax.servlet.ServletOutputStream getOutputStream()
                                                  throws IOException

javax.servlet.ServletResponseWrapper#getOutputStream()

Specified by:

getOutputStream in interface javax.servlet.ServletResponse

Overrides:

getOutputStream in class javax.servlet.ServletResponseWrapper

Throws:

IOException

getWriter

public PrintWriter getWriter()
                      throws IOException

javax.servlet.ServletResponseWrapper#getWriter()

Specified by:

getWriter in interface javax.servlet.ServletResponse

Overrides:

getWriter in class javax.servlet.ServletResponseWrapper

Throws:

IOException

sendError

public void sendError(int sc)
               throws IOException

javax.servlet.http.HttpServletResponseWrapper#sendError(int)

Specified by:

sendError in interface javax.servlet.http.HttpServletResponse

Overrides:

sendError in class javax.servlet.http.HttpServletResponseWrapper

Throws:

IOException

sendError

public void sendError(int sc,
             String msg)
               throws IOException

javax.servlet.http.HttpServletResponseWrapper#sendError(int, java.lang.String)

Specified by:

sendError in interface javax.servlet.http.HttpServletResponse

Overrides:

sendError in class javax.servlet.http.HttpServletResponseWrapper

Throws:

IOException

sendRedirect

public void sendRedirect(String location)
                  throws IOException

javax.servlet.http.HttpServletResponseWrapper#sendRedirect(java.lang. String)

Specified by:

sendRedirect in interface javax.servlet.http.HttpServletResponse

Overrides:

sendRedirect in class javax.servlet.http.HttpServletResponseWrapper

Throws:

IOException