Package org.apache.catalina.filters

Class ExpiresFilter.XHttpServletResponse

java.lang.Object

javax.servlet.ServletResponseWrapper

javax.servlet.http.HttpServletResponseWrapper

org.apache.catalina.filters.ExpiresFilter.XHttpServletResponse

All Implemented Interfaces:

HttpServletResponse, ServletResponse

Enclosing class:

ExpiresFilter

public class ExpiresFilter.XHttpServletResponse
extends HttpServletResponseWrapper

Wrapping extension of the HttpServletResponse to yrap the "Start Write Response Body" event.

For performance optimization : this extended response holds the lastModifiedHeader and cacheControlHeader values access to the slow HttpServletResponseWrapper.getHeader(String) and to spare the string to date to long conversion.

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	Description
XHttpServletResponse(HttpServletRequest request, HttpServletResponse response)

Method Summary

Modifier and Type	Method	Description
void	addDateHeader(String name, long date)	The default behavior of this method is to call addDateHeader(String name, long date) on the wrapped response object.
void	addHeader(String name, String value)	The default behavior of this method is to return addHeader(String name, String value) on the wrapped response object.
String	getCacheControlHeader()
long	getLastModifiedHeader()
ServletOutputStream	getOutputStream()	The default behavior of this method is to return getOutputStream() on the wrapped response object.
PrintWriter	getWriter()	The default behavior of this method is to return getWriter() on the wrapped response object.
boolean	isLastModifiedHeaderSet()
boolean	isWriteResponseBodyStarted()
void	reset()	The default behavior of this method is to call reset() on the wrapped response object.
void	setDateHeader(String name, long date)	The default behavior of this method is to call setDateHeader(String name, long date) on the wrapped response object.
void	setHeader(String name, String value)	The default behavior of this method is to return setHeader(String name, String value) on the wrapped response object.
void	setWriteResponseBodyStarted(boolean writeResponseBodyStarted)

Methods inherited from class javax.servlet.http.HttpServletResponseWrapper

addCookie, addIntHeader, containsHeader, encodeRedirectUrl, encodeRedirectURL, encodeUrl, encodeURL, getHeader, getHeaderNames, getHeaders, getStatus, sendError, sendError, sendRedirect, setIntHeader, setStatus, setStatus

Methods inherited from class javax.servlet.ServletResponseWrapper

flushBuffer, getBufferSize, getCharacterEncoding, getContentType, getLocale, getResponse, isCommitted, isWrapperFor, isWrapperFor, resetBuffer, setBufferSize, setCharacterEncoding, setContentLength, setContentLengthLong, 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

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

Constructor Details

XHttpServletResponse

public XHttpServletResponse(HttpServletRequest request,
 HttpServletResponse response)

Method Details

addDateHeader

public void addDateHeader(String name,
 long date)

Description copied from class: javax.servlet.http.HttpServletResponseWrapper

The default behavior of this method is to call addDateHeader(String name, long date) on the wrapped response object.

Specified by:

addDateHeader in interface HttpServletResponse

Overrides:

addDateHeader in class HttpServletResponseWrapper

Parameters:

name - the name of the header to set

date - the additional date value

See Also:

• HttpServletResponse.setDateHeader(java.lang.String, long)

addHeader

public void addHeader(String name,
 String value)

Description copied from class: javax.servlet.http.HttpServletResponseWrapper

The default behavior of this method is to return addHeader(String name, String value) on the wrapped response object.

Specified by:

addHeader in interface HttpServletResponse

Overrides:

addHeader in class HttpServletResponseWrapper

Parameters:

name - the name of the header

value - the additional header value If it contains octet string, it should be encoded according to RFC 2047 (http://www.ietf.org/rfc/rfc2047.txt)

See Also:

• HttpServletResponse.setHeader(java.lang.String, java.lang.String)

getCacheControlHeader

public String getCacheControlHeader()

getLastModifiedHeader

public long getLastModifiedHeader()

getOutputStream

public ServletOutputStream getOutputStream()
                                    throws IOException

Description copied from class: javax.servlet.ServletResponseWrapper

The default behavior of this method is to return getOutputStream() on the wrapped response object.

Specified by:

getOutputStream in interface ServletResponse

Overrides:

getOutputStream in class ServletResponseWrapper

Returns:

a ServletOutputStream for writing binary data

Throws:

IOException - if an input or output exception occurred

See Also:

• ServletResponse.getWriter()

getWriter

public PrintWriter getWriter()
                      throws IOException

Description copied from class: javax.servlet.ServletResponseWrapper

The default behavior of this method is to return getWriter() on the wrapped response object.

Specified by:

getWriter in interface ServletResponse

Overrides:

getWriter in class ServletResponseWrapper

Returns:

a PrintWriter object that can return character data to the client

Throws:

UnsupportedEncodingException - if the character encoding returned by getCharacterEncoding cannot be used

IOException - if an input or output exception occurred

See Also:

• ServletResponse.getOutputStream()
• ServletResponse.setCharacterEncoding(java.lang.String)

isLastModifiedHeaderSet

public boolean isLastModifiedHeaderSet()

isWriteResponseBodyStarted

public boolean isWriteResponseBodyStarted()

reset

public void reset()

Description copied from class: javax.servlet.ServletResponseWrapper

The default behavior of this method is to call reset() on the wrapped response object.

Specified by:

reset in interface ServletResponse

Overrides:

reset in class ServletResponseWrapper

See Also:

• ServletResponse.setBufferSize(int)
• ServletResponse.getBufferSize()
• ServletResponse.flushBuffer()
• ServletResponse.isCommitted()

setDateHeader

public void setDateHeader(String name,
 long date)

Description copied from class: javax.servlet.http.HttpServletResponseWrapper

The default behavior of this method is to call setDateHeader(String name, long date) on the wrapped response object.

Specified by:

setDateHeader in interface HttpServletResponse

Overrides:

setDateHeader in class HttpServletResponseWrapper

Parameters:

name - the name of the header to set

date - the assigned date value

See Also:

• HttpServletResponse.containsHeader(java.lang.String)
• HttpServletResponse.addDateHeader(java.lang.String, long)

setHeader

public void setHeader(String name,
 String value)

Description copied from class: javax.servlet.http.HttpServletResponseWrapper

The default behavior of this method is to return setHeader(String name, String value) on the wrapped response object.

Specified by:

setHeader in interface HttpServletResponse

Overrides:

setHeader in class HttpServletResponseWrapper

Parameters:

name - the name of the header

value - the header value If it contains octet string, it should be encoded according to RFC 2047 (http://www.ietf.org/rfc/rfc2047.txt)

See Also:

• HttpServletResponse.containsHeader(java.lang.String)
• HttpServletResponse.addHeader(java.lang.String, java.lang.String)

setWriteResponseBodyStarted

public void setWriteResponseBodyStarted(boolean writeResponseBodyStarted)