net.sf.ehcache.constructs.web
Class PageInfo

java.lang.Object
  net.sf.ehcache.constructs.web.PageInfo

All Implemented Interfaces:

java.io.Serializable

public class PageInfo
extends java.lang.Object
implements java.io.Serializable

A Serializable representation of a HttpServletResponse.

Version:

$Id: PageInfo.java 744 2008-08-16 20:10:49Z gregluck $

Author:

Adam Murdoch, Greg Luck

See Also:

Serialized Form

Constructor Summary

PageInfo(int statusCode, java.lang.String contentType, java.util.Collection headers, java.util.Collection cookies, byte[] body, boolean storeGzipped, long timeToLiveSeconds)
Creates a PageInfo object representing the "page".

Method Summary

java.lang.String	getContentType()
java.util.Date	getCreated() The Date this PageInfo object was created
byte[]	getGzippedBody()
java.util.List	getResponseHeaders() Returns the headers of the response.
java.util.List	getSerializableCookies() Returns the cookies of the response.
int	getStatusCode() Returns the status code of the response.
long	getTimeToLiveSeconds() The time to live in seconds.
byte[]	getUngzippedBody()
boolean	hasGzippedBody()
boolean	hasUngzippedBody()
static boolean	isGzipped(byte[] candidate) Checks the first two bytes of the candidate byte array for the magic number 0x677a.
boolean	isOk() Returns true if the response is Ok.
protected void	setTimeToLiveWithCheckForNeverExpires(long timeToLiveSeconds) See http://www.w3.org/Protocols/rfc2616/rfc2616-sec14.html To mark a response as "never expires," an origin server sends an Expires date approximately one year from the time the response is sent.

Methods inherited from class java.lang.Object

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

Constructor Detail

PageInfo

public PageInfo(int statusCode,
                java.lang.String contentType,
                java.util.Collection headers,
                java.util.Collection cookies,
                byte[] body,
                boolean storeGzipped,
                long timeToLiveSeconds)
         throws AlreadyGzippedException

Creates a PageInfo object representing the "page".

Parameters:

statusCode -

contentType -

headers -

cookies -

body -

storeGzipped - set this to false for images and page fragments which should never

timeToLiveSeconds - the time to Live in seconds. 0 means maximum, which is one year per RFC2616.

Throws:

AlreadyGzippedException

Method Detail

setTimeToLiveWithCheckForNeverExpires

protected void setTimeToLiveWithCheckForNeverExpires(long timeToLiveSeconds)

See http://www.w3.org/Protocols/rfc2616/rfc2616-sec14.html To mark a response as "never expires," an origin server sends an Expires date approximately one year from the time the response is sent. HTTP/1.1 servers SHOULD NOT send Expires dates more than one year in the future.

Parameters:

timeToLiveSeconds - accepts 0, which means eternal. If the time is 0 or > one year, it is set to one year in accordance with the RFC.

Note: PageInfo does not hold a reference to the ehcache Element and therefore does not know what the Element ttl is. It would normally make most sense to set the TTL to the same as the element expiry.

isGzipped

public static boolean isGzipped(byte[] candidate)

Checks the first two bytes of the candidate byte array for the magic number 0x677a. This magic number was obtained from /usr/share/file/magic. The line for gzip is:

>>14 beshort 0x677a (gzipped)

Parameters:

candidate - the byte array to check

Returns:

true if gzipped, false if null, less than two bytes or not gzipped

getContentType

public java.lang.String getContentType()

Returns:

the content type of the response.

getGzippedBody

public byte[] getGzippedBody()

Returns:

the gzipped version of the body if the content is storeGzipped, otherwise null

getResponseHeaders

public java.util.List getResponseHeaders()

Returns the headers of the response.

getSerializableCookies

public java.util.List getSerializableCookies()

Returns the cookies of the response.

getStatusCode

public int getStatusCode()

Returns the status code of the response.

getUngzippedBody

public byte[] getUngzippedBody()
                        throws java.io.IOException

Returns:

the ungzipped version of the body. This gunzipped on demand when storedGzipped, otherwise the ungzipped body is returned.

Throws:

java.io.IOException

hasGzippedBody

public boolean hasGzippedBody()

Returns:

true if there is a non null gzipped body

hasUngzippedBody

public boolean hasUngzippedBody()

Returns:

true if there is a non null ungzipped body

isOk

public boolean isOk()

Returns true if the response is Ok.

Returns:

true if the response code is 200.

getCreated

public java.util.Date getCreated()

The Date this PageInfo object was created

getTimeToLiveSeconds

public long getTimeToLiveSeconds()

The time to live in seconds.

Returns:

the time to live, or 0 if the wrapping element is eternal