org.apache.catalina.connector
Class Response

java.lang.Object
  org.apache.catalina.connector.Response

All Implemented Interfaces:

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

public class Response

extends java.lang.Object

implements javax.servlet.http.HttpServletResponse

Wrapper object for the Coyote response.

Version:

$Id: Response.java 939525 2010-04-30 00:36:35Z kkolinko $

Author:

Remy Maucherat, Craig R. McClanahan

Field Summary

protected boolean	appCommitted The application commit flag.
protected Connector	connector Associated Catalina connector.
protected java.util.ArrayList	cookies The set of Cookies associated with this Response.
protected Response	coyoteResponse Coyote response.
protected boolean	error The error flag.
protected ResponseFacade	facade The facade associated with this response.
protected java.text.SimpleDateFormat	format The date format we will use for creating date headers.
protected boolean	included The included flag.
protected static java.lang.String	info Descriptive information about this Response implementation.
protected OutputBuffer	outputBuffer The associated output buffer.
protected CoyoteOutputStream	outputStream The associated output stream.
protected CharChunk	redirectURLCC Recyclable buffer to hold the redirect URL.
protected Request	request The request with which this response is associated.
protected static StringManager	sm The string manager for this package.
protected UEncoder	urlEncoder URL encoder.
protected boolean	usingOutputStream Using output stream flag.
protected boolean	usingWriter Using writer flag.
protected CoyoteWriter	writer The associated writer.

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

Response()

Method Summary

void	addCookie(javax.servlet.http.Cookie cookie) Add the specified Cookie to those that will be included with this Response.
void	addCookieInternal(javax.servlet.http.Cookie cookie, boolean httpOnly) Add the specified Cookie to those that will be included with this Response.
void	addDateHeader(java.lang.String name, long value) Add the specified date header to the specified value.
void	addHeader(java.lang.String name, java.lang.String value) Add the specified header to the specified value.
void	addIntHeader(java.lang.String name, int value) Add the specified integer header to the specified value.
boolean	containsHeader(java.lang.String name) Has the specified header been set already in this response?
javax.servlet.ServletOutputStream	createOutputStream() Create and return a ServletOutputStream to write the content associated with this Response.
java.lang.String	encodeRedirectUrl(java.lang.String url) Deprecated. As of Version 2.1 of the Java Servlet API, use encodeRedirectURL() instead.
java.lang.String	encodeRedirectURL(java.lang.String url) Encode the session identifier associated with this response into the specified redirect URL, if necessary.
java.lang.String	encodeUrl(java.lang.String url) Deprecated. As of Version 2.1 of the Java Servlet API, use encodeURL() instead.
java.lang.String	encodeURL(java.lang.String url) Encode the session identifier associated with this response into the specified URL, if necessary.
void	finishResponse() Perform whatever actions are required to flush and close the output stream or writer, in a single operation.
void	flushBuffer() Flush the buffer and commit this response.
int	getBufferSize() Return the actual buffer size used for this Response.
java.lang.String	getCharacterEncoding() Return the character encoding used for this Response.
Connector	getConnector() Return the Connector through which this Request was received.
int	getContentCount() Return the number of bytes actually written to the output stream.
long	getContentCountLong() Return the number of bytes actually written to the output stream.
int	getContentLength() Return the content length that was set or calculated for this Response.
java.lang.String	getContentType() Return the content type that was set or calculated for this response, or null if no content type was set.
Context	getContext() Return the Context within which this Request is being processed.
javax.servlet.http.Cookie[]	getCookies() Return an array of all cookies set for this response, or a zero-length array if no cookies have been set.
Response	getCoyoteResponse() Get the Coyote response.
java.lang.String	getHeader(java.lang.String name) Return the value for the specified header, or null if this header has not been set.
java.lang.String[]	getHeaderNames() Return an array of all the header names set for this response, or a zero-length array if no headers have been set.
java.lang.String[]	getHeaderValues(java.lang.String name) Return an array of all the header values associated with the specified header name, or an zero-length array if there are no such header values.
boolean	getIncluded() Return the "processing inside an include" flag.
java.lang.String	getInfo() Return descriptive information about this Response implementation and the corresponding version number, in the format <description>/<version>.
java.util.Locale	getLocale() Return the Locale assigned to this response.
java.lang.String	getMessage() Return the error message that was set with sendError() for this Response.
javax.servlet.ServletOutputStream	getOutputStream() Return the servlet output stream associated with this Response.
java.io.PrintWriter	getReporter() Return a PrintWriter that can be used to render error messages, regardless of whether a stream or writer has already been acquired.
Request	getRequest() Return the Request with which this Response is associated.
javax.servlet.http.HttpServletResponse	getResponse() Return the ServletResponse for which this object is the facade.
int	getStatus() Return the HTTP status code associated with this Response.
java.io.OutputStream	getStream() Return the output stream associated with this Response.
java.io.PrintWriter	getWriter() Return the writer associated with this Response.
boolean	isAppCommitted() Application commit flag accessor.
boolean	isCommitted() Has the output of this response already been committed?
protected boolean	isEncodeable(java.lang.String location) Return true if the specified URL should be encoded with a session identifier.
boolean	isError() Error flag accessor.
boolean	isSuspended() Suspended flag accessor.
void	recycle() Release all object references, and initialize instance variables, in preparation for reuse of this object.
void	reset() Clear any content written to the buffer.
void	reset(int status, java.lang.String message) Reset this response, and specify the values for the HTTP status code and corresponding message.
void	resetBuffer() Reset the data buffer but not any status or header information.
void	sendAcknowledgement() Send an acknowledgment of a request.
void	sendError(int status) Send an error response with the specified status and a default message.
void	sendError(int status, java.lang.String message) Send an error response with the specified status and message.
void	sendRedirect(java.lang.String location) Send a temporary redirect to the specified redirect location URL.
void	setAppCommitted(boolean appCommitted) Set the application commit flag.
void	setBufferSize(int size) Set the buffer size to be used for this Response.
void	setCharacterEncoding(java.lang.String charset)
void	setConnector(Connector connector) Set the Connector through which this Request was received.
void	setContentLength(int length) Set the content length (in bytes) for this Response.
void	setContentType(java.lang.String type) Set the content type for this Response.
void	setContext(Context context) Set the Context within which this Request is being processed.
void	setCoyoteResponse(Response coyoteResponse) Set the Coyote response.
void	setDateHeader(java.lang.String name, long value) Set the specified date header to the specified value.
void	setError() Set the error flag.
void	setHeader(java.lang.String name, java.lang.String value) Set the specified header to the specified value.
void	setIncluded(boolean included) Set the "processing inside an include" flag.
void	setIntHeader(java.lang.String name, int value) Set the specified integer header to the specified value.
void	setLocale(java.util.Locale locale) Set the Locale that is appropriate for this response, including setting the appropriate character encoding.
void	setRequest(Request request) Set the Request with which this Response is associated.
void	setStatus(int status) Set the HTTP status to be returned with this response.
void	setStatus(int status, java.lang.String message) Deprecated. As of Version 2.1 of the Java Servlet API, this method has been deprecated due to the ambiguous meaning of the message parameter.
void	setStream(java.io.OutputStream stream) Set the output stream associated with this Response.
void	setSuspended(boolean suspended) Set the suspended flag.
protected java.lang.String	toEncoded(java.lang.String url, java.lang.String sessionId) Return the specified URL with the specified session identifier suitably encoded.

Methods inherited from class java.lang.Object

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

Field Detail

info

protected static final java.lang.String info

Descriptive information about this Response implementation.

See Also:

Constant Field Values

sm

protected static StringManager sm

The string manager for this package.

format

protected java.text.SimpleDateFormat format

The date format we will use for creating date headers.

connector

protected Connector connector

Associated Catalina connector.

coyoteResponse

protected Response coyoteResponse

Coyote response.

outputBuffer

protected OutputBuffer outputBuffer

The associated output buffer.

outputStream

protected CoyoteOutputStream outputStream

The associated output stream.

writer

protected CoyoteWriter writer

The associated writer.

appCommitted

protected boolean appCommitted

The application commit flag.

included

protected boolean included

The included flag.

error

protected boolean error

The error flag.

cookies

protected java.util.ArrayList cookies

The set of Cookies associated with this Response.

usingOutputStream

protected boolean usingOutputStream

Using output stream flag.

usingWriter

protected boolean usingWriter

Using writer flag.

urlEncoder

protected UEncoder urlEncoder

URL encoder.

redirectURLCC

protected CharChunk redirectURLCC

Recyclable buffer to hold the redirect URL.

request

protected Request request

The request with which this response is associated.

facade

protected ResponseFacade facade

The facade associated with this response.

Constructor Detail

Response

public Response()

Method Detail

getConnector

public Connector getConnector()

Return the Connector through which this Request was received.

setConnector

public void setConnector(Connector connector)

Set the Connector through which this Request was received.

Parameters:

connector - The new connector

setCoyoteResponse

public void setCoyoteResponse(Response coyoteResponse)

Set the Coyote response.

Parameters:

coyoteResponse - The Coyote response

getCoyoteResponse

public Response getCoyoteResponse()

Get the Coyote response.

getContext

public Context getContext()

Return the Context within which this Request is being processed.

setContext

public void setContext(Context context)

Set the Context within which this Request is being processed. This must be called as soon as the appropriate Context is identified, because it identifies the value to be returned by getContextPath(), and thus enables parsing of the request URI.

Parameters:

context - The newly associated Context

recycle

public void recycle()

Release all object references, and initialize instance variables, in preparation for reuse of this object.

getContentCount

public int getContentCount()

Return the number of bytes actually written to the output stream.

getContentCountLong

public long getContentCountLong()

Return the number of bytes actually written to the output stream.

setAppCommitted

public void setAppCommitted(boolean appCommitted)

Set the application commit flag.

Parameters:

appCommitted - The new application committed flag value

isAppCommitted

public boolean isAppCommitted()

Application commit flag accessor.

getIncluded

public boolean getIncluded()

Return the "processing inside an include" flag.

setIncluded

public void setIncluded(boolean included)

Set the "processing inside an include" flag.

Parameters:

included - true if we are currently inside a RequestDispatcher.include(), else false

getInfo

public java.lang.String getInfo()

Return descriptive information about this Response implementation and the corresponding version number, in the format <description>/<version>.

getRequest

public Request getRequest()

Return the Request with which this Response is associated.

setRequest

public void setRequest(Request request)

Set the Request with which this Response is associated.

Parameters:

request - The new associated request

getResponse

public javax.servlet.http.HttpServletResponse getResponse()

Return the ServletResponse for which this object is the facade.

getStream

public java.io.OutputStream getStream()

Return the output stream associated with this Response.

setStream

public void setStream(java.io.OutputStream stream)

Set the output stream associated with this Response.

Parameters:

stream - The new output stream

setSuspended

public void setSuspended(boolean suspended)

Set the suspended flag.

Parameters:

suspended - The new suspended flag value

isSuspended

public boolean isSuspended()

Suspended flag accessor.

setError

public void setError()

Set the error flag.

isError

public boolean isError()

Error flag accessor.

createOutputStream

public javax.servlet.ServletOutputStream createOutputStream()
                                                     throws java.io.IOException

Create and return a ServletOutputStream to write the content associated with this Response.

Throws:

java.io.IOException - if an input/output error occurs

finishResponse

public void finishResponse()
                    throws java.io.IOException

Perform whatever actions are required to flush and close the output stream or writer, in a single operation.

Throws:

java.io.IOException - if an input/output error occurs

getContentLength

public int getContentLength()

Return the content length that was set or calculated for this Response.

getContentType

public java.lang.String getContentType()

Return the content type that was set or calculated for this response, or null if no content type was set.

Specified by:

getContentType in interface javax.servlet.ServletResponse

getReporter

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

Return a PrintWriter that can be used to render error messages, regardless of whether a stream or writer has already been acquired.

Returns:

Writer which can be used for error reports. If the response is not an error report returned using sendError or triggered by an unexpected exception thrown during the servlet processing (and only in that case), null will be returned if the response stream has already been used.

Throws:

java.io.IOException - if an input/output error occurs

flushBuffer

public void flushBuffer()
                 throws java.io.IOException

Flush the buffer and commit this response.

Specified by:

flushBuffer in interface javax.servlet.ServletResponse

Throws:

java.io.IOException - if an input/output error occurs

getBufferSize

public int getBufferSize()

Return the actual buffer size used for this Response.

Specified by:

getBufferSize in interface javax.servlet.ServletResponse

getCharacterEncoding

public java.lang.String getCharacterEncoding()

Return the character encoding used for this Response.

Specified by:

getCharacterEncoding in interface javax.servlet.ServletResponse

getOutputStream

public javax.servlet.ServletOutputStream getOutputStream()
                                                  throws java.io.IOException

Return the servlet output stream associated with this Response.

Specified by:

getOutputStream in interface javax.servlet.ServletResponse

Throws:

java.lang.IllegalStateException - if getWriter has already been called for this response

java.io.IOException - if an input/output error occurs

getLocale

public java.util.Locale getLocale()

Return the Locale assigned to this response.

Specified by:

getLocale in interface javax.servlet.ServletResponse

getWriter

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

Return the writer associated with this Response.

Specified by:

getWriter in interface javax.servlet.ServletResponse

Throws:

java.lang.IllegalStateException - if getOutputStream has already been called for this response

java.io.IOException - if an input/output error occurs

isCommitted

public boolean isCommitted()

Has the output of this response already been committed?

Specified by:

isCommitted in interface javax.servlet.ServletResponse

reset

public void reset()

Clear any content written to the buffer.

Specified by:

reset in interface javax.servlet.ServletResponse

Throws:

java.lang.IllegalStateException - if this response has already been committed

resetBuffer

public void resetBuffer()

Reset the data buffer but not any status or header information.

Specified by:

resetBuffer in interface javax.servlet.ServletResponse

Throws:

java.lang.IllegalStateException - if the response has already been committed

setBufferSize

public void setBufferSize(int size)

Set the buffer size to be used for this Response.

Specified by:

setBufferSize in interface javax.servlet.ServletResponse

Parameters:

size - The new buffer size

Throws:

java.lang.IllegalStateException - if this method is called after output has been committed for this response

setContentLength

public void setContentLength(int length)

Set the content length (in bytes) for this Response.

Specified by:

setContentLength in interface javax.servlet.ServletResponse

Parameters:

length - The new content length

setContentType

public void setContentType(java.lang.String type)

Set the content type for this Response.

Specified by:

setContentType in interface javax.servlet.ServletResponse

Parameters:

type - The new content type

setCharacterEncoding

public void setCharacterEncoding(java.lang.String charset)

Specified by:

setCharacterEncoding in interface javax.servlet.ServletResponse

setLocale

public void setLocale(java.util.Locale locale)

Set the Locale that is appropriate for this response, including setting the appropriate character encoding.

Specified by:

setLocale in interface javax.servlet.ServletResponse

Parameters:

locale - The new locale

getCookies

public javax.servlet.http.Cookie[] getCookies()

Return an array of all cookies set for this response, or a zero-length array if no cookies have been set.

getHeader

public java.lang.String getHeader(java.lang.String name)

Return the value for the specified header, or null if this header has not been set. If more than one value was added for this name, only the first is returned; use getHeaderValues() to retrieve all of them.

Parameters:

name - Header name to look up

getHeaderNames

public java.lang.String[] getHeaderNames()

Return an array of all the header names set for this response, or a zero-length array if no headers have been set.

getHeaderValues

public java.lang.String[] getHeaderValues(java.lang.String name)

Return an array of all the header values associated with the specified header name, or an zero-length array if there are no such header values.

Parameters:

name - Header name to look up

getMessage

public java.lang.String getMessage()

Return the error message that was set with sendError() for this Response.

getStatus

public int getStatus()

Return the HTTP status code associated with this Response.

reset

public void reset(int status,
                  java.lang.String message)

Reset this response, and specify the values for the HTTP status code and corresponding message.

Throws:

java.lang.IllegalStateException - if this response has already been committed

addCookie

public void addCookie(javax.servlet.http.Cookie cookie)

Add the specified Cookie to those that will be included with this Response.

Specified by:

addCookie in interface javax.servlet.http.HttpServletResponse

Parameters:

cookie - Cookie to be added

addCookieInternal

public void addCookieInternal(javax.servlet.http.Cookie cookie,
                              boolean httpOnly)

Add the specified Cookie to those that will be included with this Response.

Parameters:

cookie - Cookie to be added

httpOnly - Should the httpOnly flag be set on this cookie

addDateHeader

public void addDateHeader(java.lang.String name,
                          long value)

Add the specified date header to the specified value.

Specified by:

addDateHeader in interface javax.servlet.http.HttpServletResponse

Parameters:

name - Name of the header to set

value - Date value to be set

addHeader

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

Add the specified header to the specified value.

Specified by:

addHeader in interface javax.servlet.http.HttpServletResponse

Parameters:

name - Name of the header to set

value - Value to be set

addIntHeader

public void addIntHeader(java.lang.String name,
                         int value)

Add the specified integer header to the specified value.

Specified by:

addIntHeader in interface javax.servlet.http.HttpServletResponse

Parameters:

name - Name of the header to set

value - Integer value to be set

containsHeader

public boolean containsHeader(java.lang.String name)

Has the specified header been set already in this response?

Specified by:

containsHeader in interface javax.servlet.http.HttpServletResponse

Parameters:

name - Name of the header to check

encodeRedirectURL

public java.lang.String encodeRedirectURL(java.lang.String url)

Encode the session identifier associated with this response into the specified redirect URL, if necessary.

Specified by:

encodeRedirectURL in interface javax.servlet.http.HttpServletResponse

Parameters:

url - URL to be encoded

encodeRedirectUrl

public java.lang.String encodeRedirectUrl(java.lang.String url)

Deprecated. As of Version 2.1 of the Java Servlet API, use encodeRedirectURL() instead.

Encode the session identifier associated with this response into the specified redirect URL, if necessary.

Specified by:

encodeRedirectUrl in interface javax.servlet.http.HttpServletResponse

Parameters:

url - URL to be encoded

encodeURL

public java.lang.String encodeURL(java.lang.String url)

Encode the session identifier associated with this response into the specified URL, if necessary.

Specified by:

encodeURL in interface javax.servlet.http.HttpServletResponse

Parameters:

url - URL to be encoded

encodeUrl

public java.lang.String encodeUrl(java.lang.String url)

Deprecated. As of Version 2.1 of the Java Servlet API, use encodeURL() instead.

Encode the session identifier associated with this response into the specified URL, if necessary.

Specified by:

encodeUrl in interface javax.servlet.http.HttpServletResponse

Parameters:

url - URL to be encoded

sendAcknowledgement

public void sendAcknowledgement()
                         throws java.io.IOException

Send an acknowledgment of a request.

Throws:

java.io.IOException - if an input/output error occurs

sendError

public void sendError(int status)
               throws java.io.IOException

Send an error response with the specified status and a default message.

Specified by:

sendError in interface javax.servlet.http.HttpServletResponse

Parameters:

status - HTTP status code to send

Throws:

java.lang.IllegalStateException - if this response has already been committed

java.io.IOException - if an input/output error occurs

sendError

public void sendError(int status,
                      java.lang.String message)
               throws java.io.IOException

Send an error response with the specified status and message.

Specified by:

sendError in interface javax.servlet.http.HttpServletResponse

Parameters:

status - HTTP status code to send

message - Corresponding message to send

Throws:

java.lang.IllegalStateException - if this response has already been committed

java.io.IOException - if an input/output error occurs

sendRedirect

public void sendRedirect(java.lang.String location)
                  throws java.io.IOException

Send a temporary redirect to the specified redirect location URL.

Specified by:

sendRedirect in interface javax.servlet.http.HttpServletResponse

Parameters:

location - Location URL to redirect to

Throws:

java.lang.IllegalStateException - if this response has already been committed

java.io.IOException - if an input/output error occurs

setDateHeader

public void setDateHeader(java.lang.String name,
                          long value)

Set the specified date header to the specified value.

Specified by:

setDateHeader in interface javax.servlet.http.HttpServletResponse

Parameters:

name - Name of the header to set

value - Date value to be set

setHeader

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

Set the specified header to the specified value.

Specified by:

setHeader in interface javax.servlet.http.HttpServletResponse

Parameters:

name - Name of the header to set

value - Value to be set

setIntHeader

public void setIntHeader(java.lang.String name,
                         int value)

Set the specified integer header to the specified value.

Specified by:

setIntHeader in interface javax.servlet.http.HttpServletResponse

Parameters:

name - Name of the header to set

value - Integer value to be set

setStatus

public void setStatus(int status)

Set the HTTP status to be returned with this response.

Specified by:

setStatus in interface javax.servlet.http.HttpServletResponse

Parameters:

status - The new HTTP status

setStatus

public void setStatus(int status,
                      java.lang.String message)

Deprecated. As of Version 2.1 of the Java Servlet API, this method has been deprecated due to the ambiguous meaning of the message parameter.

Set the HTTP status and message to be returned with this response.

Specified by:

setStatus in interface javax.servlet.http.HttpServletResponse

Parameters:

status - The new HTTP status

message - The associated text message

isEncodeable

protected boolean isEncodeable(java.lang.String location)

Return true if the specified URL should be encoded with a session identifier. This will be true if all of the following conditions are met:

• The request we are responding to asked for a valid session
• The requested session ID was not received via a cookie
• The specified URL points back to somewhere within the web application that is responding to this request

Parameters:

location - Absolute URL to be validated

toEncoded

protected java.lang.String toEncoded(java.lang.String url,
                                     java.lang.String sessionId)

Return the specified URL with the specified session identifier suitably encoded.

Parameters:

url - URL to be encoded with the session id

sessionId - Session id to be included in the encoded URL