org.mmbase.servlet
Class ImageServlet

java.lang.Object
  javax.servlet.GenericServlet
      javax.servlet.http.HttpServlet
          org.mmbase.servlet.MMBaseServlet
              org.mmbase.servlet.BridgeServlet
                  org.mmbase.servlet.HandleServlet
                      org.mmbase.servlet.ImageServlet

All Implemented Interfaces:

Serializable, Servlet, ServletConfig, MMBaseStarter

public class ImageServlet
extends HandleServlet

ImageServlet handles nodes as images. If you want to convert an image (resize it, turn it, change its colors etc) then you want to serve an 'icaches' node ('icaches' are cached conversions of images), which you have to create yourself before calling this servlet. The cache() function of Images can be used for this. An URL can be gotten with cachepath().

Since:

MMBase-1.6

Version:

$Id: ImageServlet.java 44572 2011-01-06 08:56:39Z michiel $

Author:

Michiel Meeuwissen

See Also:

AbstractImages, Images.executeFunction(org.mmbase.module.core.MMObjectNode, java.lang.String, java.util.List), AttachmentServlet, Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from class org.mmbase.servlet.BridgeServlet

BridgeServlet.QueryParts

Field Summary

Fields inherited from class org.mmbase.servlet.HandleServlet

legalizeFileName

Fields inherited from class org.mmbase.servlet.BridgeServlet

FILE_PATTERN, MESSAGE_ATTRIBUTE

Fields inherited from class org.mmbase.servlet.MMBaseServlet

mmbase, retryAfter

Constructor Summary

ImageServlet()

Method Summary

protected Node	desperatelyGetNode(Cloud cloud, String nodeIdentifier) Overridden to support 'title aliases'.
protected Map<String,Integer>	getAssociations()
protected Cloud	getClassCloud()
protected String	getMimeType(Node node) Forces download in browsers.
protected Node	getServedNode(BridgeServlet.QueryParts query, Node node) ImageServlet can serve a icache node in stead (using the 'extra parameters)'
String	getServletInfo()
void	init() Takes care of the 'expire' init-parameter.
protected boolean	setContent(BridgeServlet.QueryParts query, Node node, String mimeType) Content-Disposition header Sets the content disposition header.

Methods inherited from class org.mmbase.servlet.HandleServlet

doGet, getContentDisposition, getFileName, getSize, main, sendBytes, sendBytes, setCacheControl, setExpires

Methods inherited from class org.mmbase.servlet.BridgeServlet

, findCloud, getAnonymousCloud, getCloud, getCloudName, getLastModified, getNode, readQuery, readQuery, readQueryFromRequestURI, readServletPath

Methods inherited from class org.mmbase.servlet.MMBaseServlet

associateMapping, checkInited, decRefCount, destroy, getBasePath, getMMBase, getRequestURL, getServletByAssociation, getServletByMapping, getServletMappings, getServletMappingsByAssociation, incRefCount, service, setInitException, setMMBase

Methods inherited from class javax.servlet.http.HttpServlet

doDelete, doHead, doOptions, doPost, doPut, doTrace, service

Methods inherited from class javax.servlet.GenericServlet

getInitParameter, getInitParameterNames, getServletConfig, getServletContext, getServletName, init, log, log

Methods inherited from class java.lang.Object

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

Constructor Detail

ImageServlet

public ImageServlet()

Method Detail

init

public void init()
          throws ServletException

Description copied from class: HandleServlet

Takes care of the 'expire' init-parameter.

Overrides:

init in class HandleServlet

Throws:

ServletException

getClassCloud

protected final Cloud getClassCloud()

Overrides:

getClassCloud in class HandleServlet

getServletInfo

public String getServletInfo()

Specified by:

getServletInfo in interface Servlet

Overrides:

getServletInfo in class MMBaseServlet

getAssociations

protected Map<String,Integer> getAssociations()

Overrides:

getAssociations in class HandleServlet

getMimeType

protected String getMimeType(Node node)

Description copied from class: HandleServlet

Forces download in browsers. This is overriden in several extensions.

Overrides:

getMimeType in class HandleServlet

setContent

protected boolean setContent(BridgeServlet.QueryParts query,
                             Node node,
                             String mimeType)
                      throws IOException

Content-Disposition header Sets the content disposition header.

Overrides:

setContent in class HandleServlet

Returns:

true on success

Throws:

IOException

getServedNode

protected Node getServedNode(BridgeServlet.QueryParts query,
                             Node node)
                      throws IOException

ImageServlet can serve a icache node in stead (using the 'extra parameters)'

Overrides:

getServedNode in class BridgeServlet

Throws:

IOException

Since:

MMBase-1.7.4

desperatelyGetNode

protected Node desperatelyGetNode(Cloud cloud,
                                  String nodeIdentifier)

Overridden to support 'title aliases'.

Overrides:

desperatelyGetNode in class BridgeServlet

Since:

MMBase-1.7.5