Applet in Spring MVC

[mad_rug]

Hi

I'm going to use applets in my web application (Spring MVC + JSP), but I can't correctly map the request. Right now I'm facing problems with firefox to open <embed> tag, so I'm using <applet>, that works for me on both IE and FF.
I get an exception compaining that I have no mapping in my DispatcherServlet for the applet. How am I supposed to do this mapping?

This is a very simple question, but even googling I could not find out how to do it.

Any tip/hint is welcome!
Thanks!

[mad_rug]

If that makes any difference here, I'll be using <applet> tag. I know it is deprecated, but it seems more compatible in some browsers (my FF3 still can't accept <embed> no matter what).

Still, how can I map an applet in Spring MVC?
Thanks!

[Daxon]

Did you ever find a solution to this?

I can't figure it out.

The DispatcherServlet wants a mapping to the *.class
yet I have added the jar file to the root of the project thus leaving it
outside of WEB-INF

I add a jar package with many classes
but java never picks up my class within the jar package.

<applet name="jumpLoaderApplet"
		code="jmaster.jumploader.app.JumpLoaderApplet.class"
		archive="jumploader_z.jar"
		width="600"
		height="400" 
		mayscript>
	<param name="uc_uploadUrl" value="/uploadHandler"/>
</applet>

load: class jmaster.jumploader.app.JumpLoaderApplet.class not found.
java.lang.ClassNotFoundException: jmaster.jumploader.app.JumpLoaderApplet.class

Caused by: java.io.IOException: open HTTP connection failed:http://localhost:8080/webapp/jmaster/jumploader/app/JumpLoaderApplet/class.class

[lunaspeed]

where are you serving the jmaster.jumploader.app.JumpLoaderApplet.class from?
within your WEB-INF? or some location similar to your javascript?

[Daxon]

Outside the WEB-INF folder. Accessible on the client side

webapp/
.
.jumploader_z.jar
.
.JavaScript/
.
.WEB-INF/
       .
       .
       .lib
       .view

Its an open source Image Uploading Applet,
So I tried following directions from its site

http://jumploader.com/doc_overview.html
check the applet configuration.

Do i need to pack the jar file a different way?

[Aashish Dalmia]

Try this-

In your jsp file-
<param name="uc_uploadUrl" value="uploadHandler"/>
In your web.xml -
<url-pattern>/uploadHandler</url-pattern>

[Daxon]

Nope it didn't work

the param name="uc_uploader" is the url called to post the images.

I just want to be able to run the applet on screen.

I think there is a problem due to spring security.

The mapping changes from "/jmaster/jumploader/app/JumpLoaderApplet.class"
to "/jmaster/jumploader/app/JumpLoaderApplet/class.class"

as it goes down the filter line.

31  WARN PageNotFound:959 - No mapping found for HTTP request with URI [/webapp/jmaster/jumploader/app/JumpLoaderApplet.class] in DispatcherServlet with name 'springmvc'
15:42:49,632 DEBUG HttpSessionSecurityContextRepository:316 - SecurityContext contents are anonymous - context will not be stored in HttpSession. 
15:42:49,632 DEBUG DispatcherServlet:643 - Successfully completed request
15:42:49,633 DEBUG ExceptionTranslationFilter:100 - Chain processed normally
15:42:49,633 DEBUG SecurityContextPersistenceFilter:87 - SecurityContextHolder now cleared, as request processing completed
15:42:49,678 DEBUG FilterChainProxy:197 - Converted URL to lowercase, from: '/jmaster/jumploader/app/jumploaderapplet/class.class'; to: '/jmaster/jumploader/app/jumploaderapplet/class.class'
15:42:49,678 DEBUG FilterChainProxy:204 - Candidate is: '/jmaster/jumploader/app/jumploaderapplet/class.class'; pattern is /**; matched=true

I just can't get the applet's jar file to be picked up

[Aashish Dalmia]

I have this and it works for me-

Try this-

---------------------------------------------------------------
under Web-

put jumploader_z.jar & your jsp file with applet code
Applet code =
<applet name="jumpLoaderApplet"
code="jmaster.jumploader.app.JumpLoaderApplet.clas s"
archive="jumploader_z.jar"
width="600"
height="400"
mayscript >
<param name="uc_uploadUrl" value="uploadHandler"/>

under lib -
put your cos.jar file

under web.xml-
put this code-

<servlet>
<servlet-name>uploadHandler</servlet-name>
<servlet-class>com.ejustice.servlets.uploadHandler</servlet-class>
<load-on-startup>2</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>uploadHandler</servlet-name>
<url-pattern>/uploadHandler</url-pattern>
</servlet-mapping>

under your uploadHandler.java file-
put this code-


import com.ejustice.rms.logger.ApplicationLogger;
import com.ejustice.util.ApplicationResourceBundle;
import java.io.*;
import java.util.*;
import javax.servlet.*;
import javax.servlet.http.*;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import com.oreilly.servlet.MultipartRequest;

public class uploadHandler extends HttpServlet {

@Override
public void doPost(HttpServletRequest req, HttpServletResponse res)
throws ServletException, IOException {
res.setContentType("multipart/form-data");
PrintWriter out = res.getWriter();

try {
System.out.println("Here in the class 1 of upload handler");
String dir = (String) ApplicationResourceBundle.getResource("localDirPat h");
System.out.println("----------- Image upload local machine dir is::------------" + dir);
MultipartRequest multi =
new MultipartRequest(req, dir, 50 *1024 * 1024,
new com.oreilly.servlet.multipart.DefaultFileRenamePol icy());

out.println("<HTML>");
out.println("<HEAD><TITLE>Upload File</TITLE></HEAD>");
out.println("<BODY>");
out.println("<H1>UploadTest</H1>");

// Print the parameters we received
out.println("<H3>Params:</H3>");
out.println("<PRE>");
Enumeration params = multi.getParameterNames();
while (params.hasMoreElements()) {
String name = (String)params.nextElement();
String value = multi.getParameter(name);
out.println(name + " = " + value);
}
out.println("</PRE>");

// Show which files we received
out.println("<H3>Files:</H3>");
out.println("<PRE>");
Enumeration files = multi.getFileNames();
while (files.hasMoreElements()) {
String name = (String)files.nextElement();
String filename = multi.getFilesystemName(name);
String original = multi.getOriginalFileName(name);
String type = multi.getContentType(name);
File f = multi.getFile(name);
out.println("name: " + name);
out.println("filename: " + filename);
if (filename != null && !filename.equals(original)) {
out.println("original file name: " + original);
}
out.println("type: " + type);
if (f != null) {
out.println("length: " + f.length());
}
out.println();
}
out.println("</PRE>");
}
catch (Exception e) {
out.println("<PRE>");
e.printStackTrace(out);
logger.error("Cause of error is:"+ e.getMessage());
out.println("</PRE>");
}
out.println("</BODY></HTML>");

}

---------------------------------------------------
Let me know if this doesnt work

Thanks
Aashish

[Daxon]

I tried what you posted but no luck,

I'm a little confused as to your mapping using the standard
web.xml mapping, where I have to put both the front end DispatcherServlet(all requests should be going through this)
and a custom uploadHandler mapping for the uploaded image class,

I've never seen this in a Spring MVC app before

<servlet>
		<servlet-name>springmvc</servlet-name>
		<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
		<load-on-startup>1</load-on-startup>
	</servlet>
	
	<servlet-mapping>
		<servlet-name>springmvc</servlet-name>
		<url-pattern>/</url-pattern>
	</servlet-mapping>
	
	<servlet>
		<servlet-name>uploadHandler</servlet-name>
		<servlet-class>com.myapp.images.UploadHandler</servlet-class>
		<load-on-startup>2</load-on-startup>
	</servlet>
	
	<servlet-mapping>
		<servlet-name>uploadHandler</servlet-name>
		<url-pattern>/uploadHandler</url-pattern>
	</servlet-mapping>

Are you using jumploader_z.jar in a Spring MVC application?

And you said you place the jsp and jumploader_z.jar within the "Web-" ,does this mean WEB-INF folder?

I tried it inside and outside the WEB-INF,

nothing has changed and my spring filter chain mapping still somehow modifies the mapping... to .. "/class.class"


The uploaderHandler.java should work when I'll be able to load the applet,
So the only problem im facing is correctly mapping the jumploader_z.jar class through the DispatcherServlet.


The full Java Console Stack

Exception: java.lang.ClassNotFoundException: jmaster.jumploader.app.JumpLoaderApplet.class
load: class jmaster.jumploader.app.JumpLoaderApplet.class not found.
java.lang.ClassNotFoundException: jmaster.jumploader.app.JumpLoaderApplet.class
	at sun.plugin2.applet.Applet2ClassLoader.findClass(Unknown Source)
	at java.lang.ClassLoader.loadClass(Unknown Source)
	at java.lang.ClassLoader.loadClass(Unknown Source)
	at sun.plugin2.applet.Plugin2ClassLoader.loadCode(Unknown Source)
	at sun.plugin2.applet.Plugin2Manager.createApplet(Unknown Source)
	at sun.plugin2.applet.Plugin2Manager$AppletExecutionRunnable.run(Unknown Source)
	at java.lang.Thread.run(Unknown Source)
Caused by: java.io.IOException: open HTTP connection failed:http://localhost:8080/myapp/jmaster/jumploader/app/JumpLoaderApplet/class.class
	at sun.plugin2.applet.Applet2ClassLoader.getBytes(Unknown Source)
	at sun.plugin2.applet.Applet2ClassLoader.access$000(Unknown Source)
	at sun.plugin2.applet.Applet2ClassLoader$1.run(Unknown Source)
	at java.security.AccessController.doPrivileged(Native Method)
	... 7 more
Exception: java.lang.ClassNotFoundException: jmaster.jumploader.app.JumpLoaderApplet.class

Thanks for your time,
Allan

[Aashish Dalmia]

Hi Allan

-----------------------------------------------------------------
Basically your stack says that it is not finding the applet class which comes from jumploader_z.jar
I believe that on your jsp page it is giving "Error:click for details" message.

1. Where is your jumploader jar is placed?
2. Can you post your jsp code here?

Your questions were-
3. Are you using jumploader_z.jar in a Spring MVC application?
=> Yes

4. And you said you place the jsp and jumploader_z.jar within the "Web-"
,does this mean WEB-INF folder?
=> jumploader jar will never work inside of WEB-INF folder because it is a
client side jar not the server side(atleast thats what I figured when I
was coding)

Post your jsp code & jumploader jar path here
---------------------------------------------------

Thanks
Aashish Dalmia