Java Web Start Access

I am using a Java Web Start application to write and read files on a computer. When ever I try to run it, it says access denied. I have tried signing it, but that didn't work. Does anyone got an answer?

You should have the all-permission tag or use javax.jnlp services.
If this answer doesn't suffice, I sugget you post your jnlp and code.
Bye.

Similar Messages

Database access with Jave Web Start

Can a java application, that has been deployed by using Java Web Start, access information from a database that's located on the web server from where the application was deployed?

Yes, if you use the type 4 (ie, thin) driver and include the driver's jar file as part of the app.
Technically you can do it with a thick driver but then you have first install the driver on the client machine and I assume this isn't what you are looking for,

Exception while using Java Comm and Java Web Start together

Hello Java Experts!
Here's the problem that's been bothering me. The application i'm developing uses Java Comm API to listen to Serial Ports. The application works absolutely fine when it is run locally.
Now, I need to deploy this remotely using java web start. All resources(dependent jar files) are present on the server and are referenced properly in the JNLP file. All jar files are signed properly.
Still, it throws the following exception.
java.lang.NullPointerException: name can't be null
     at java.io.FilePermission.init(Unknown Source)
     at java.io.FilePermission.<init>(Unknown Source)
     at java.lang.SecurityManager.checkDelete(Unknown Source)
     at javax.comm.CommPortIdentifier.getPortIdentifiers(CommPortIdentifier.java:70)
The exact line of code where it apparently seems to error out is...
Enumeration portList = CommPortIdentifier.getPortIdentifiers();
Are there any security issues involved here? Can a application deployed through java web start access serial ports on the system?
Any pointers as to what the problem might be would be much appreciated.
Thanks in advance!

I have the IBM Communications API. I've
been told that it works with Java Web Start but I
have not tried it. IBM has changed it's download site
so.... I can't point you to it. But I have it(55k zip'ed)
and can send it to you if you post your E-Mail address
of where you would like it sent.
Bruce Houghton
PS If it does work with Web Start please post the
news here. I will be watching.

Access local disk via Java Web Start??

HI all ,
I had saw the JWS document.
It indicate we can't access local disk via JWS in that Security.
If I need to access local disk by command, does anyone have better suggestion.
And can I run *.bat via Java Web Start?
Thanks very much for your help.
Morris

I do the both thing but still don't access to Local disk.
I just write a simple test class within extend another that create a file (and of course sign it)but still can't create a file Local disk. this MAKE ME MAD and LOOSE MY JOB .
here is my JNLP file:
<?xml version="1.0" encoding="utf-8"?>

<jnlp
spec="1.0+"
codebase="file:///d:/"
href="test.jnlp">
<information>
<title>Me</title>
<vendor>myself</vendor>
<homepage href="http://www.me.com"/>
<description> test test test</description>
<description kind="short">Test creatin of log file on client </description>
</information>
<offline-allowed/>
<security>
<all-permissions/>
</security>
<resources>
<j2se version="1.4"/>
<jar href="test2.jar"/>
</resources>
<application-desc main-class="secMan.Test"/>
</jnlp>

"access denied" error from Java Web Start

I can successfully download the jar file, but always have error message "access denied" when the java application tries to open a local file in C:\temp\poc1.xml.
I can successfully execute the java application from DOS,but failed when using Java Web Start. The error message is as follows:
Java Web Start Console, started Wed Nov 28 16:30:31 PST 2001Java 2 Runtime Environment: Version
1.3.1 by Sun Microsystems Inc.java.security.AccessControlException: access denied
(java.io.FilePermission C:\temp\poc1.xml read)     at
org.apache.xerces.framework.XMLParser.parse(Unknown Source)     at
org.apache.xerces.framework.XMLParser.parse(Unknown Source)     at
com.hotlocker.client.HLSessionParser.parse(Unknown Source)     at
com.hotlocker.client.UploadDownloadClient.uploadFiles(Unknown Source)     at
com.hotlocker.client.UploadDownload.main(Unknown Source)     at
java.lang.reflect.Method.invoke(Native Method)     at
com.sun.javaws.Launcher.executeApplication(Unknown Source)     at
com.sun.javaws.Launcher.executeMainClass(Unknown Source)     at
com.sun.javaws.Launcher.continueLaunch(Unknown Source)     at
com.sun.javaws.Launcher.handleApplicationDesc(Unknown Source)     at
com.sun.javaws.Launcher.handleLaunchFile(Unknown Source)     at
com.sun.javaws.Launcher.run(Unknown Source)     at java.lang.Thread.run(Unknown Source)

Hi,
you can't get a file like in a "normal" app
because a JWS-app runs in the restricted
sandbox environment by default.
So you either sign your app with a digital certificate
or you use a special FileOpenService (JNLP-API).
You could also put the file into the app-jar and
load it by a classloader.
Regards,
Mathias

Accessing libraries from java web start

hi guys,
I am new to forums and sorry if this question has been posed before. I am trying to access jogl.dll and jogl_cg.dll through java web start. These libraries are getting downloaded on the client machine as a jar file. I am using the following commands to access these files
System.loadLibrary("jogl");
System.loadLibrary("jogl_cg");
Its giving me the follwing error
Exception in thread "main" java.lang.UnsatisfiedLinkError: C:\java\tools\jogl_cg.dll: Can't find dependent libraries
at java.lang.ClassLoader$NativeLibrary.load(Native Method)
at java.lang.ClassLoader.loadLibrary0(ClassLoader.java:1751)
at java.lang.ClassLoader.loadLibrary(ClassLoader.java:1676)
at java.lang.Runtime.loadLibrary0(Runtime.java:822)
at java.lang.System.loadLibrary(System.java:992)
at testlib.Main.main(Main.java:35)
Java Result: 1
I am getting unsatisfied link error as its searching for another library which jogl_cg.dll depends upon. Can anybody suggest me what other library do i need to attach and the way i am accessing the libraries using system.loadlibrary is correct or not
I would appreciate your help in this regard.
Thanks in advance,
ravi ananthuni.

Actually you're correct. There was a resource missing.
The error was in the way I was packaging mail.jar. This archive has resources located in the META-INF subfolder inside the jar file. I'm running on Windows 2000, and I was expanding the mail.jar file, and then recreating and signing the archive using the Netscape utility signtool with the -Z option:
signtool -k <mycert> -d <keystore_path> -Z mail.jar <expanded JAR directory>.
When creating the JAR file, the META-INF folder is deleted and replaced with the META-INF entries for the JAR you've just created. The other resources packaged in the META-INF are overwritten, and so the signed mail.jar did not work properly -- hence the NoSuchProvider exception.
For reference the solution is to sign the directory without creating the jar file:
signtool -k <mycert> -d <keystore_path> <expanded JAR directory>
and then create the jar file from the signed directory using another archiving utility. I used the command line interface for Winzip 8.0.
cd <expanded JAR directory>
wzzip -rp ..\mail.jar *
http://developer.netscape.com/docs/manuals/cms/41/adm_gide/app_sign.htm#1012833
Thanks!
-- Eric.
Hi,
you suppose that the .jar files are not signed
correctly,
but what should have gone wrong?
You can check that each .jar is correctly signed with
the jarsigner tool:
jarsigner -verify -verbose foo.jar
If all your jars are reported to be signed, the only
other error I can imagine regarding signing is the
"all .jars referenced by one .jnlp must be signed
by the same key" rule. (Read Section 5.4 of the
jnlp 1.0.1 spec).
javax.mail.NoSuchProviderException: No provider for
Address type: rfc822
files to be listed as resources, Java Web Startfails
to launch my application (unsigned application
requesting unrestricted access to system).I would have expected the latter error, if you
have a signing problem.
That first error looks like something different,
perhaps the app is looking for a resource that
defines rfc822 behaviour.
Regards,
Marc

Access JAR File while running App with Java Web Start

Hello guys,
I want to delpoy my application so that I can run it when I click on the appropriate button in a web page.
I have a Jar file for all the files that the app needs. No, not all of the files are included.
Indeed, I use JAR files such jdom.jar or postgres...jar that I must use in within my application.
How can I access these JAR files knowing that I can't point to files in a JAR file A from within a JAR file B, if the JAR file B contains the JAR file A?
The main JAR file that I put on the web server can be seen as the JAR file B and the other JAR files must be stored somewhere for the java classes within the main JAR file to have access to them.
I wonder whether there is another way to structure the project.
Thanks.

Hi Andrew.
I have followed your suggestions and here is what my .jnlp file look like:
<tt>
<?xml version="1.0" encoding="utf-8"?>
<jnlp spec="1.0+" codebase="http://localhost:8080/koedops" href="beta.jnlp">
     <information>
          <title>KOEDOPS</title>
          <vendor>Pr. Fischer</vendor>
          <homepage href="http://localhost:8080/" />
          <description>Downloading koedops with Java Web Start</description>
     </information>
     <resources>
          <j2se version="1.6+" />
          <jar href="beta.jar" main="true"/>
          <jar href="jcalendar-1.3.3.jar" />
          <jar href="jdom.jar" />
          <jar href="postgresql-8.4-701.jdbc4.jar" />
     </resources>
     <application-desc main-class="general.Application" />
</jnlp>
</tt>
The three other jar-files reside in the same directory as the .jnlp file and the beta.jar file on the tomcat server.
When I launch the application though nothing happens upon the download. In contrast, if I change the main class to a class file that requires no extra library, it runs perfectly.
I can't be sure whether the jar-files are successfully accessed.
Regards.
Edmond

Unable to Launch Integration Builder: Java Web Start problem

Hi,
I am unable to launch the integration builder. I am using JDK 1.4.2_05. The java Web Start gives the following error:
Unsigned application requesting unrestricted access to system
Unsigned resource: http://<XIHostName>:50000/rep/repository/aii_util_rb.jar
I have tried deleting the Java web start cache, and even reinstalling the JDK.
Can someone suggest a workaround this problem ?
thanks,
Manish

The Java Web Start cannot accept unsigned jars. If the jars are signed, it will ask in a dialog box if it should allow unrestricted access to this jar.
In my case, I upgraded XI SP0 to SP4, which included updating the Adapter Core, Adapter Framework, and the XI TOOLS to SP4.
On launching the Web start, it seemed that the jars were not getting signed. JWS cannot allow unsigned jars to the client.
These jars are maintained in:
\usr\sap\<SID>\SYS\global\xi\directory_server\javaws\directory
I am having problems with my XI upgrade to SP4, and it is probably not signing the jars.
Do you know why this may be happening ...
thanks,
Manish

Java web start application runs too slow...

Hello,
I am new to Java Web Start. I have created a java web start application and when i enable web start from local Execution, then it works perfectly well. But when i upload it on server and then download the application, then it is too too slow...i mean it takes minutes to get the output on clicking some button....my jnlp file is as under:
<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<jnlp codebase="http://(web server code base)" href="launch.jnlp" spec="1.0+">
<information>
<title>ERD</title>
<vendor>Deepika Gohil</vendor>
<homepage href="http://appframework.dev.java.net"/>
<description>A simple java desktop application based on Swing Application Framework</description>
<description kind="short">ER Deign Tools</description>
</information>
<update check="always"/>
<security>
<all-permissions/>
</security>
<resources>
<j2se version="1.5+"/>
<jar href="ERD_1_2.jar" main="true"/>
<jar href="lib/appframework-1.0.3.jar"/>
<jar href="lib/swing-worker-1.1.jar"/>
<jar href="lib/jaxb-impl.jar"/>
<jar href="lib/jaxb-xjc.jar"/>
<jar href="lib/jaxb1-impl.jar"/>
<jar href="lib/activation.jar"/>
<jar href="lib/jaxb-api.jar"/>
<jar href="lib/jsr173_api.jar"/>
<jar href="lib/ant-contrib-1.0b3.jar"/>
<jar href="lib/jaxb-impl.jar"/>
<jar href="lib/jaxb-xjc.jar"/>
<jar href="lib/FastInfoset.jar"/>
<jar href="lib/gmbal-api-only.jar"/>
<jar href="lib/http.jar"/>
<jar href="lib/jaxws-rt.jar"/>
<jar href="lib/jaxws-tools.jar"/>
<jar href="lib/management-api.jar"/>
<jar href="lib/mimepull.jar"/>
<jar href="lib/policy.jar"/>
<jar href="lib/saaj-impl.jar"/>
<jar href="lib/stax-ex.jar"/>
<jar href="lib/streambuffer.jar"/>
<jar href="lib/woodstox.jar"/>
<jar href="lib/jaxws-api.jar"/>
<jar href="lib/jsr181-api.jar"/>
<jar href="lib/jsr250-api.jar"/>
<jar href="lib/saaj-api.jar"/>
<jar href="lib/activation.jar"/>
<jar href="lib/jaxb-api.jar"/>
<jar href="lib/jsr173_api.jar"/>
</resources>
<application-desc main-class="erd.screen1">
</application-desc>
</jnlp>
I dont understand the reason. Could you please help me out.
Thank you,
Deepika Gohil.

Check your web server's access logs to see how many requests web start is sending for each jar. After you've loaded the application the first time, for each subsequent launch, if you've got everything configured right, you should only see requests for the JNLP file and maybe some gifs because web start should load everything else out of the cache (if you're using the version-based download protocol). Or if you're using the basic download protocol, then you might see requests for each jar file, but even in this case, if your web server is prepared to evaluate the last-updated attribute for each jar request and for jars that have not changed, respond with no actual payload and a header value of Not-Modified, then that should run almost as fast.
You might also want to consider changing the "check" attribute of the "update" element from "always" to "background" for a couple of reasons. It should allow your app to start sooner (but this means that you might have to launch once or twice after an update is applied to the web server before the update shows up on the workstation). Also, my impression is that "always" is broken and prevents web start from ever checking to see if your jnlp file has been updated if you launch your app from a web start shortcut - launching from a browser is less likely to have this problem, depending on how often your browser is configured to check for updated resources.

Java web start unable to auto download java 1.6.0_14

Hi,
My application runs on java 1.6.0_14 and i want clients to use either 1.6.0_14 or higher while running the application. In the JNLP file i have mentioned j2se version as 1.6.0_14+
If the client machine has a java version lesser than 1.6.0_14, Java web start is not automatically downloading the given version from sun auto download site.
Isn' t this version supported by Sun for auto download? If yes, how to get around this problem?

Thanks..
We do have a web page from which we access the jnlp and that web page has javascript to force download of a specific version of JRE. Once it downloads the application on client machine, it creates an icon on the desktop.
If the application and jnlp is changed on the server, we want clients to go through the icon on desktop and still get the version of jre mentioned in the updated jnlp rather than having them go through the web page again do download the new JRE required...

Can not launch swing application from Java Web Start 1.6.0_37

I have a dynamic generated jnlp file from a serlvet. When I used Java Web Start to start the swing application, it failed. The exception showed
com.sun.deploy.net.FailedDownloadException: Unable to load resource: http://xxxx.xx.com:9080/dilpipweb/Test-1.0-SNAPSHOT.jar
     at com.sun.deploy.net.DownloadEngine.actionDownload(Unknown Source)
     at com.sun.deploy.net.DownloadEngine.getCacheEntry(Unknown Source)
     at com.sun.deploy.net.DownloadEngine.getCacheEntry(Unknown Source)
     at com.sun.deploy.net.DownloadEngine.getResourceCacheEntry(Unknown Source)
     at com.sun.deploy.net.DownloadEngine.getResourceCacheEntry(Unknown Source)
     at com.sun.deploy.net.DownloadEngine.getResource(Unknown Source)
     at com.sun.javaws.LaunchDownload$DownloadTask.call(Unknown Source)
     at java.util.concurrent.FutureTask$Sync.innerRun(Unknown Source)
     at java.util.concurrent.FutureTask.run(Unknown Source)
     at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(Unknown Source)
     at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
     at java.lang.Thread.run(Unknown Source)
I used janela to validate the generated jnlp file. It was valid. I also checked the tomcat access log, it showed that the Test-1.0-SNAPSHOT.jar file was accessed correctly (with a 200 return code).
Can anyone help me what was the problem?
Thanks,

Hi.
I got a different problem. My Corba application works in JRE 1.6, but doesn't works in JRE 1.5.X. I got an unexpected error and my console shows:
getSubjectX500Principal NoSuchMethodError: java.lang NoSuchMethodError
#### Java Web Start Error:
#### null
Can you help me?

How can I open help file (HTML or .chm) from Java Web Start (new to JAVA)

Hi All,
Im trying to open the help file of my application.
When trying to access the help file from the GUI (pressing F1 for launching the help file), I'm geting the an error, something like:
"Can't show help URL: jar:file:C:\Documents and Settings\%USER%\Application Data\Sun\Java\Deployment\javaws\cache\http\Dlocalhost\P7001\DMwebstart\RMjar-name!/com/resources/helpFiles/MyHelpFile.html"
It seems that the file which is packed in a jar, was downloaded to the Java Web Start cache directory:
C:\Documents and Settings\%USER%\Application Data\Sun\Java\Deployment\javaws\cache\http\Dlocalhost\P7001\DMwebstart
The code which is activated when launching the help file is:
try
            ResourceBundle resourceBundle = DoubleResourceBundle.getBundle("Resource", "ResourceImpl");
            RuntimeUtil.launchFile(new File(resourceBundle.getString("help.file")));
        } catch (IOException e)
            // TODO Auto-generated catch block
            e.printStackTrace();
        }where the property "help.file" is in some property file in the resource bundle named "Resource", and looks like this :
help.file="com/trax/docs/help/global/MyHelpFile.html"
The function "RuntimeUtil.launchFile" knows how to launch any file in its default application, and indeed it does launches the html, when giving it an absolute path to the file on my PC, as "C:\Helpfiles\MyHelpFile.html" as such:
RuntimeUtil.launchFile("C:\Helpfiles\MyHelpFile.html");My question is :
The application is going to be deployed on a Customer PC. How can I access the html file from the code, with a relative path and not its absolute path on the customer pc, which I can't know?
I found these restrictions regarding web start:
(copied from "http://rachel.sourceforge.net/"):
*Rule 1: Java Archives only. No loose files.* All your resources have to be packaged in Java Archives (jar) if you want to have
them delivered to the user's machine and kept up-to-date automatically by Java Web Start.
*Rule 2: No file paths.* You can't use absolute or relative file paths to locate your
jars holding your resources (e.g. <code>jar:file:///c:/java/jws/.cache/resources.jar</code>).
Absolute file paths won't work because you never know where Java Web Start
will put your jar on the user's machine. Relative file paths won't work because Java Web Start
mangles the names of your jars (e.g. <code>venus.jar</code> becomes <code>RMvenus.jar</code>)
and every JNLP client implementation has the right to mangle your names
in a different way and you, therefore, can't predict the name with
which your jar will be rechristend and end up on the user's machine in
the application cache.Seems complex or impossible, to perform a simple task like opening a file.
Please advise (I'm new to Java and Web Start).
BTW, I'm working with IntelliJ IDEA 5.0.
Thanks,
Zedik.
{font:Tahoma}{size:26pt}
{size}{font}

the follwing method i have used to open html file ...
so to access html file i am shipping resources folder with jar file ..
private void openHtmlPages(String pageName) {
     String cmd[] = new String[2];
     String browser = null;
     File file = null;
     if(System.getProperty("os.name").indexOf("Linux")>-1) {
          file = new File("/usr/bin/mozilla");
          if(!file.exists() ) {
          }else     {
               browser = "mozilla";
     }else {
          browser = "<path of iexplore>";
     cmd[0] = browser;
     File files = new File("");
     String metaData = "/resources/Help/Files/"+pageName+".html"; // folder inside jar file
     java.net.URL url = this.getClass().getResource(metaData);
     String fileName = url.getFile();
     fileName = fileName.replaceAll("file:/","");
     fileName = fileName.replaceAll("%2520"," ");
     fileName = fileName.replaceAll("%20"," ");
     fileName = fileName.replaceAll("jarfilename.jar!"," ").trim();
     cmd[1] = fileName;
     try{
          Process p = Runtime.getRuntime().exec(cmd);
     }catch(java.io.IOException io){
               //Ignore
can anyone give me the solution..???
Regards
Ganesan S

Error while running Java Web Start in JDK 1.5

I have been running an application using Jboss3.2 in JDK1.4.2_09. The Java Web Start application ran perfectly then.
Now, I am running Jboss3.2 with JDK 1.5.0_11. While some applications (HTML client and some Java Web Start applications are working correctly) are working correctly, this particular Java Web Start application fails.
General Tab:
An error occurred while launching/running the application.
Title: Server_Security
Vendor: df
Category: Download Error
Bad MIME type returned from server when accessing resource: http://localhost:8080/webapp/SampDB1/Server_Security/application/javassist.jar - null
Exception Tab:
JNLPException[category: Download Error : Exception: null : LaunchDesc: null ]
     at com.sun.javaws.cache.DownloadProtocol.doDownload(DownloadProtocol.java:617)
     at com.sun.javaws.cache.DownloadProtocol.getDownloadSize(DownloadProtocol.java:884)
     at com.sun.javaws.LaunchDownload.downloadJarFiles(LaunchDownload.java:698)
     at com.sun.javaws.LaunchDownload.downloadEagerorAll(LaunchDownload.java:662)
     at com.sun.javaws.Launcher.downloadResources(Launcher.java:1032)
     at com.sun.javaws.Launcher.handleApplicationDesc(Launcher.java:375)
     at com.sun.javaws.Launcher.handleLaunchFile(Launcher.java:218)
     at com.sun.javaws.Launcher.run(Launcher.java:165)
     at java.lang.Thread.run(Thread.java:595)

You appear to be using a 1.4.x program on a file belonging to 1.5. Check your path variable, it's probably the cause.

Java Web Start no longer works after Update 4

After applying the update to Java for Mac OS X 10.5 Update 4, my webstart files (.jnlp) now all think they are Internet Explorer files to be opened in Parallels.
Does anyone know how to re-associate these files with Java? Or, otherwise, a workaround to enable me to access the applications again.

You are not alone. This has happened to me and to others. And Apple is aware of the problem.
There seem to be 2 ways.
1. Find the JNLP file in the Finder. Select "Get Info". Choose other from the Open With Pull Down Menu. Navigate to /System/Library/CoreServices and find Java Web Start.app. Then click Change All.
2. Open /System/Library/CoreServices in the Finder. This was suggested by nyagil (http://discussions.apple.com/message.jspa?messageID=9634326#9685181).

Java Web Start not working with Proxy

I have Java Web Start program not listening to proxy settings. It tries to access localhost using our proxy settings, but with no user name or password. I'm wondering if Java Web Start has proxy settings somewhere. I'm not sure since when we disable the proxy settings the program works without issue. Any thoughts?
Thanks

For instance Safari uses those System Proxy settings, Firefox uses it's own!
So Java is using it's own, now we're waiting for an expert to drop in!

Java Web Start Access

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