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:

MMBaseStarter, java.io.Serializable, javax.servlet.Servlet, javax.servlet.ServletConfig

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,v 1.15.2.1 2005/08/15 16:39:12 michiel Exp $

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 inherited from class org.mmbase.servlet.BridgeServlet

BridgeServlet.QueryParts

Field Summary

Fields inherited from class org.mmbase.servlet.BridgeServlet

FILE_PATTERN

Fields inherited from class org.mmbase.servlet.MMBaseServlet

mmbase, retryAfter

Constructor Summary

ImageServlet()

Method Summary

protected java.util.Map	getAssociations() On default, servlets are not associated with any function.
protected java.lang.String	getMimeType(Node node)
protected Node	getServedNode(BridgeServlet.QueryParts query, Node node) ImageServlet can serve a icache node in stead (using the 'extra parameters'
java.lang.String	getServletInfo() Returns information about this servlet.
void	init() The init of an MMBaseServlet checks if MMBase is running.
protected boolean	setContent(javax.servlet.http.HttpServletRequest req, javax.servlet.http.HttpServletResponse res, Node node, java.lang.String mimeType) Sets the content disposition header.

Methods inherited from class org.mmbase.servlet.HandleServlet

doGet, sendBytes, setCacheControl, setExpires

Methods inherited from class org.mmbase.servlet.BridgeServlet

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

Methods inherited from class org.mmbase.servlet.MMBaseServlet

associateMapping, checkInited, decRefCount, destroy, 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 javax.servlet.ServletException

Description copied from class: MMBaseServlet

The init of an MMBaseServlet checks if MMBase is running. It not then it is started.

Overrides:

init in class HandleServlet

Throws:

javax.servlet.ServletException

getServletInfo

public java.lang.String getServletInfo()

Description copied from class: MMBaseServlet

Returns information about this servlet. Don't forget to override it.

Specified by:

getServletInfo in interface javax.servlet.Servlet

Overrides:

getServletInfo in class MMBaseServlet

getAssociations

protected java.util.Map getAssociations()

Description copied from class: MMBaseServlet

On default, servlets are not associated with any function. This function is called in the init method.

Overrides:

getAssociations in class HandleServlet

getMimeType

protected java.lang.String getMimeType(Node node)

Overrides:

getMimeType in class HandleServlet

setContent

protected boolean setContent(javax.servlet.http.HttpServletRequest req,
                             javax.servlet.http.HttpServletResponse res,
                             Node node,
                             java.lang.String mimeType)
                      throws java.io.IOException

Description copied from class: HandleServlet

Sets the content disposition header.

Overrides:

setContent in class HandleServlet

Returns:

true on success

Throws:

java.io.IOException

getServedNode

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

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

Overrides:

getServedNode in class BridgeServlet

Parameters:

query - A QueryParts object, which you must have obtained by readQuery

node - The node which is specified on the URL (obtained by getNode

Throws:

java.io.IOException

Since:

MMBase-1.7.4