Using a DLL or .so in a JNLP-launched applet

I have a 3rd-party JAR which includes code that requires a DLL (or .so on Linux) to work and I need to use it in a JNLP-launched applet. What's required with Java 6 Update 16?
1. I believe I need to get the DLL inside its own JAR and mark it as a native library in the JNLP. Is that just a matter of using the jar command to put it in the JAR?
2. Must the applet then be signed?
3. If yes to (2), will the end user still get some kind of security warning before running the applet?
4. If yes to (3), will the warning only appear the first time the applet is run and not again after the JAR is cached?
5. Do I need to manually "load" the DLL inside the applet's code? If not, how else does it know where to find the DLL (like -Djava.library.path in an application)?
Thanks,
The Gibbon

I have a 3rd-party JAR which includes code that requires a DLL (or .so on Linux) to work and I need to use it in a JNLP-launched applet. What's required with Java 6 Update 16?Nothing different than other JRE's, what's the question?That was an introduction to my set of 5 specific questions.
1. I believe I need to get the DLL inside its own JAR and mark it as a native library in the JNLP. Is that just a matter of using the jar command to put it in the JAR?Yes it is.Good.
2. Must the applet then be signed?No, AFAIKWell see hear's the problem. The Google research I did before I asked the questions was confusing as some people said it needed to be signed and others didn't. My own tests have encountered security exceptions and I was trying to know if they were because the applet wasn't signed. The whole purpose of me starting this thread was to save me a lot of time messing around with these kind of problems not knowing if it's even supposed to work or not.
See? It's all so amazing easy that making a simple test would have taken less time than this whole thread.
This is why we talked about spoonfeeding.I don't see that it's amazingly easy when you disagree with the majority of the posts and information I read which were in themselves contradictory. It's obviously not a clear cut subject and everyone has a different opinion. I was hoping someone who had tried what I am wanting to do could just tell me definitively if it was ever going to work.
What's even more amazing is that you didn't add any duke!I have to say I don't know anything about adding dukes, that's why I didn't do it.
Real thrill is you're probably gonna meet some real problem depending on your actual needs! LOL!
BTW: most of us has good knowledge of JWS but isn't such an applet expert (which, maybe, you are), so, in your case expecially, coming here with a realWorldJavaWebStartFailure would have been for sure the best approach, that's all you should really understand, IMVOHO.I realise that JWS is not often used to launch true applets but still I hope someone here would have done it and been able to share their experience.

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Using SSL with client auth from a JNLP-launched app

We have an application that is launched by JNLP, and which needs to make a mutually authenticated SSL connection to a server. The client cert and trusted certs that it needs to do this are stored in the Sun\Java\Deployment\security directory where JNLP knows to look for them. And Java WebStart itself seems to be able to use these certs just fine. However, our app seems blithely unaware of the location of the keystore/truststore unless we explicitly set the system properties javax.net.ssl.keystore and truststore. But we don't want to do that (it could be different for different users), and we shouldn't have to do that. So the question is, how can we use the same KeyManager/TrustManager that Java WebStart itself is using? Are they somehow available for the JNLP-launched app to use?
Failing that, is there a way for a JNLP-launched app to query the deployment properties? There are a bunch of properties to direct the behavior of Java WebStart (see [http://java.sun.com/j2se/1.5.0/docs/guide/deployment/deployment-guide/properties.html]), such as deployment.user.security.trusted.cacerts. These don't seem to be System properties. Can the app see them, or are the "private" to Java WebStart itself?

HI:
see also shine enterprise pattern.
I have worked with it and it helps me and results spead up.
it has a class which is named "code" and does encryption and ... by md5. it is incredibly secure! tey it.
you can download it via links bellow:
http://groups.google.com/group/j2sos.
http://sourceforge.net/projects/shine-enterpris/
it has also document

How to use a dll from webstart

hi there, i have the following, for an app (it's going to run only on windows) i need some info from the registry and used some third party code for that, now, my question is, the dll file used has to be in the systemdirectory of the local machine. How could i achieve that when the program will be running from webstart ??
1. By just copying the file into there...
2. Or other, like rewriting the source code for the third party code
thx

@babybomb: Thanks a lot ! This hint really helps even after years !
Here is my cookbook:
How to enable Java WebStart applications ?
===================================
...including native libraries !
1. Generate a Keystore
Generate a keystore (*.keystore) file.
Tool: keystore (JDK)
Syntax:
keytool -genkey -keystore mykeystore.keystore -alias myalias2. Pack native Libraries
Pack native libraries (*.dll, ...) into Java libraries (*.jar).
Tool: jar (JDK)
Syntax:
jar -cfv nativelib.dll.jar nativelib.dll3. Sign the Libraries
Sign ALL your application�s libraries (*.jar) with your keystore by using the "jarsigner" tool.
Tool: jarsigner (JDK)
Syntax:
jarsigner -keystore mykeystore.keystore myapp.jar myalias
jarsigner -keystore mykeystore.keystore 3rdparty.jar myalias
jarsigner -keystore mykeystore.keystore nativelib.dll.jar myalias4. Prepare JNLP File
Prepare Java WebStart JNLP File.
Syntax:
<?xml version="1.0" encoding="utf-8"?>

<jnlp
spec="1.5+"
codebase="$$codebase">
<information>
<title>My Application</title>
<vendor>My Company</vendor>
<description>My Application</description>
<description kind="short">MyApp</description>
<offline-allowed/>
</information>
<security>
     <all-permissions/>
</security>
<resources>
<j2se version="1.5+"/>
<jar href="myapp.jar"/>
<jar href="3rdparty.jar"/>
</resources>
<resources os="Windows">
<nativelib href="nativelib.dll.jar"/>
</resources>
<application-desc main-class="my.app.MyApp">
     <argument>arg0</argument>
     <argument>arg1</argument>
</application-desc>
</jnlp>
5. JnlpDownloadServlet
Copy the "jnlp.sample.servlet.JnlpDownloadServlet" from Java JDK into your web applications� web library directory "WEB-INF/lib".
6. Prepare Deployment Descriptor
Prepare your web application�s deployment descriptor (web.xml) to enable "JnlpDownloadServlet".
Syntax:
<servlet>
<servlet-name>JnlpDownloadServlet</servlet-name>
<servlet-class>jnlp.sample.servlet.JnlpDownloadServlet</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>JnlpDownloadServlet</servlet-name>
<url-pattern>*.jnlp</url-pattern>
</servlet-mapping>
7. Run the Application
Yesssss !!!

How to use native dlls in jws

hi,all
I need to use native dll to read registry,I know nativelib label,but after I put the dlls to a jar,and use label <nativelib> to quote the jar,the system tell me error following:
JNLPException[category: Security error : Exception: null : LaunchDesc: null ]
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     at com.sun.javaws.Launcher.downloadResources(Unknown Source)
     at com.sun.javaws.Launcher.prepareLaunchFile(Unknown Source)
     at com.sun.javaws.Launcher.prepareToLaunch(Unknown Source)
     at com.sun.javaws.Launcher.launch(Unknown Source)
     at com.sun.javaws.Main.launchApp(Unknown Source)
     at com.sun.javaws.Main.continueInSecureThread(Unknown Source)
     at com.sun.javaws.Main$1.run(Unknown Source)
     at java.lang.Thread.run(Unknown Source)
when I use jar href="..."to use this jar(This jar is packed dll files),the system tell me
com.sun.deploy.net.FailedDownloadException: Unable to load resourcesFfile:/H:/test/dist/lib/ICE_JNIRegistry.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.downloadJarFiles(Unknown Source)
     at com.sun.javaws.LaunchDownload.downloadEagerorAll(Unknown Source)
     at com.sun.javaws.Launcher.downloadResources(Unknown Source)
     at com.sun.javaws.Launcher.prepareLaunchFile(Unknown Source)
     at com.sun.javaws.Launcher.prepareToLaunch(Unknown Source)
     at com.sun.javaws.Launcher.launch(Unknown Source)
     at com.sun.javaws.Main.launchApp(Unknown Source)
     at com.sun.javaws.Main.continueInSecureThread(Unknown Source)
     at com.sun.javaws.Main$1.run(Unknown Source)
     at java.lang.Thread.run(Unknown Source)
and
java.util.zip.ZipException: ZIP file must have at least one entry
     at java.util.zip.ZipOutputStream.finish(Unknown Source)
     at java.util.zip.DeflaterOutputStream.close(Unknown Source)
     at java.util.zip.ZipOutputStream.close(Unknown Source)
     at com.sun.deploy.net.HttpDownloadHelper.download(Unknown Source)
     at com.sun.deploy.cache.Cache.downloadResourceToTempFile(Unknown Source)
     at com.sun.deploy.cache.Cache.downloadResourceToCache(Unknown Source)
     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.downloadJarFiles(Unknown Source)
     at com.sun.javaws.LaunchDownload.downloadEagerorAll(Unknown Source)
     at com.sun.javaws.Launcher.downloadResources(Unknown Source)
     at com.sun.javaws.Launcher.prepareLaunchFile(Unknown Source)
     at com.sun.javaws.Launcher.prepareToLaunch(Unknown Source)
     at com.sun.javaws.Launcher.launch(Unknown Source)
     at com.sun.javaws.Main.launchApp(Unknown Source)
     at com.sun.javaws.Main.continueInSecureThread(Unknown Source)
     at com.sun.javaws.Main$1.run(Unknown Source)
     at java.lang.Thread.run(Unknown Source)
now I'm not sure how to zip the dlls so that it can be used in nativelib?and how to used the <nativelib> label? just add it in the jnlp file ok?
Thanks.

>
Thanks,Andrew!>Your detailed and technically specific reply is all the thanks I need ( and probably more than I deserve ;).
I am still mulling (thinking) over your reply, there is nothing that 'jumps out at me' as being wrong with the way it is done, it all is looking like it 'should' work. The only other thing I can think to check is "did JaNeLA report any problems with it?"
Oh hang on, wait just a second..
If this webstart app. uses a native lib, it must declare security 'all-permissions'. See below for a 'hand written' variation to your posted JNLP file. Please make sure you validate these edits, since I did not (and I'm a little drunk, at this moment!).
<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<jnlp codebase="file:/H:/test/dist/" href="launch.jnlp" spec="1.0+">
    <information>
        <title>Basic Application Example</title>
        <vendor>Sun Microsystems Inc.</vendor>
        <homepage href="http://appframework.dev.java.net"/>
        <description>A simple java desktop application based on Swing Application Framework</description>
        <description kind="short">Basic Application Example</description>
    <offline-allowed/>
</information>
<security>
<all-permissions />
</security>
    <resources>
<j2se version="1.5+"/>
<jar eager="true" href="test.jar" main="true"/>
    <jar href="lib/appframework-1.0.3.jar"/>
<jar href="lib/swing-worker-1.1.jar"/>
<jar href="lib/registry.jar"/>
<jar href="lib/swing-layout-1.0.3.jar"/>
<nativelib href="lib/ICE_JNIRegistry.jar"/>
</resources>
    <application-desc main-class="test.TestApp">
    </application-desc>
</jnlp>Oh yeah, yeah. And if you could note for future posts..
When posting code, code snippets, HTML/XML(/JNLP) or input/output, please use the code tags. To do that, select the code, then click the CODE button seen on the Plain Text tab of the message posting form. This helps to retain the indentation and formatting of the text, and also helps avoid characters in the code as being interpreted as formatting (by the 'forum software'). ..And it also makes it pretty - but perhaps I should not mention that (it seems so 'un-hacker').
And BTW, what is that standalone=''no" attribute in the opening XML element? Are you +sure+ you validated this in JaNeLA?

Get "Creation Script" of the existing table ( in SQL database) using C# and without using SMO dlls

Hi All,
I need to get the "Creation Script" of the existing table using c# and without using SMO dlls (is it possible? I don't know).
I.e. In SQL Management Studio -> right click on any table -> Script table as -> Create To - > open in the new query editor window. This will give you the schema of the table with the constraints of the table.
For E.g. In Northwind database, for the table "Categories", I would like to get it as show below
USE [Northwind]
GO
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
CREATE TABLE [dbo].[Categories](
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) ON [PRIMARY] TEXTIMAGE_ON [PRIMARY]
GO
I would like to get the same schema using c#. Please help.
Thanks & Regards,
Kalai.

SMO is the easiest way to get this. This is what Management Studio uses. If you can't use SMO, get a Profiler trace of the queries that SMO executes when generating the script and execute the same using ADO.NET.
Regards,
Farooq Mahmud
Support Escalation Engineer
• Microsoft Health Solutions Group

Ldapssl_client_init always returns -1 when using nsldapssl32v50.dll

We have an iPlanet Directory Server v5.2 installed and SSL has been configured on it.
When we call ldapssl_client_init(CERTDBPath, NULL) we always get a the return value as -1.
We used nsldapssl32v30.dll and the corresponding lib and tried the same program and it worked perfectly fine.
Now the question is why does this call fail when using the 5.0 version of the library.
We have tried calls to ldapssl_client_init in the different ways like
--> ldapssl_client_init("D:/Program Files/Sun/MPS/alias", NULL)
with the cert7.db in this path. This failed
--> ldapssl_client_init("D:/Program Files/Sun/MPS/alias/slapd-mydb-cert7.db", NULL)
This also failed
We need to use the v5 of the library bcoz the older versions are not compliant with LDAP v3 for referral support.
Our current environment is Win2k Server SP4 and iPlanet Dir Server 5.2.
Please help us sort out this issue.
Thanks
Raghu

The function "ldapssl_client_init" returns -1, if I use LDAP SDK 6.0 binaries (source downloaded from http://wiki.mozilla.org/LDAP_C_SDK and compiled). It returns same error code i.e. -1, if we use precompiled binaries.
But if I use the old LDAP 5.2 binaries, it works fine.
Here is a sample code that I used to test ldapssl_client_init() on RHAS3.0:
#include <ldap.h>
#include <ldap_ssl.h>
#include <stdio.h>
/* Initialize client, using mozilla's certificate database */
int main(void) {
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if(ldapssl_client_init( "/home/infwaer/test/", NULL ) < 0) {
printf( "Failed to initialize SSL client...\n" );
return( 1 );
else
printf( "Initialized SSL client...\n" );
I used the following command to compile it with 5.2 binaries, and was able to successfully call the function ldapssl_client_init:
gcc ldapclient.c -I/home/infwaer/nsldap/5.2/RHAS3.0/include
-L/home/infwaer/saurabh_review/lib -lldap50 -lnspr4 -lplds4 -lplc4 -lsoftokn3 -lnss3 -lssl3 -lprldap50 -lssldap50 -ldigestmd5 -lsasl
But when I compiled it using 6.0 binaries using the same command:
gcc ldapclient.c -I/home/infwaer/nsldap/6.0/RHAS3.0/include
-L/home/infwaer/saurabh_review/lib -lldap60 -lnspr4 -lplds4 -lplc4 -lsoftokn3 -lnss3 -lssl3 -lprldap60 -lssldap60 -ldigestmd5 -lsasl
It gave the error "failed to initialize" (as written in the code !)
Please help me out; n let me know if it is a known issue with LDAP SDK 6.0. Or we need to do some special settings for version 6.0 to work properly.
Thanks & Regards,
Saurabh

Problem in using AcroPDF.dll in vb6 application

I have an vb6 application and i want to display a PDF file in a form. I have used AcroPDF.dll and works fine on developmeny system.
But when i install application on client's system i get error "Out of memory" when i try to open the form with PDF control.
can anyone help me with this.
Thanks

Try asking this question in the Acrobat SDK forum.

How can I use a dll if I dont have a header file

I'm not sure if I'm even trying the possible here as I have searched and not been able to find much at all. However I figured it was worth asking here.
I have access to several dll's used by a program, I need to open a file using the program (for some reason it is completely non responsive unless you open it "within" the program itself) and so decided to browse the .dll files included. Ive found a few functions which may carry out the function I need. Is there a way of figuring out the inputs/outputs if I don't have documentation or a header file?
This is the next stage in a huge project I am working on at the moment and I've been banging my head against the wall all day trying to figure this out.
Thanks in advance for any help
Rik
That glass?
Thats glass is neither half full or half empty....
Its twice the size it needs to be

Yes, that makes sense. It also means that what you are trying to do is not likely to work. You have no way of knowing what the program does when opening the file, so guessing at using the DLLs is purely a shot in the dark without even knowing where the dark is. Even if you could find the function (assuming it's just one) that loads a file, how is the program supposed to use it now? That function has to be called from within the program. When you call it from LabVIEW you are not sitting inside the program's memory space, so it has no way of knowing about the file.
I would suggest, instead, to see if the program accepts command-line parameters. For example, does it accept a name of a file to open as part of launching it from the command line? If not, then you may need to resort to trying to control it via automation. If it has no built-in automation then you need to resort to using the OS to make pretend you're clicking buttons and typing text. This has come up many times before, and there have been numerous posts on this, so please do a search on controlling an external program from LabVIEW within this forum. You can call the Windows API functions to move the mouse to a specific location and click the button as well as typing text, or you can use third-part automation tools. One that I have used successfully is AutoIt. The search I indicated will yield other suggestions.

Using a .dll file in Diadem2012

Dear folks,
I've got a .dll which was created using the Diadem GPI toolkit 10.2 and Microsoft Visual Studio 8.0, I guess. I'm currently using this DLL under Diadem 9.0.
Now I'd like to use this same DLL under Diadem 2012, but it won't work. When loading this DLL via the GPI-DLL loader, It only says .dll couln't be loaded, no further output, no more debug information...?
What can I do to load this DLL into Diadem2012, or do I have to code the whole DLL new?!
Thanks for your help in advance.
Tim

Hi Walter,
thanks for your fast reply.
I tried to recompile that file in Visual Studio 10, because I had an old project file coded in Visual Studio 8. Unfortunately, that did'nt work. The .dll could not be built. So I'd like to try to install the runtime library.
I don't know under which visual studio version, the dll file was built, so what should I do? Install Visual Studio 8 and 6 and hope that the runtime library I need is installed then?
Thanks for your help.
Greets Tim

How to use the DLLs which created from c++ in Java?

And How to use the DLLs which created from JNI in C++?

Huh?
Are you asking how to do JNI - you should read the tutorial.
Are you asking how to load it - then use System.loadLibrary()
Are you asking what to do with the output from javah - put it in a C file and write some code, compile it into a dll.

How to use the DLL in crystal report (Additional applications)

Hi,
i have created a win32 dll, and now i want to use that dll in my crystal report how can i do so?, what i tried is i went to to Addntional functions catagory in formula workshop, and there i can see some dlls listed, similary i put my dll in the same path like "C:\Program Files\Common Files\Crystal Decisions\1.0\Bin" and other folder too. but i am not able to see that dll in "Addtional functions". can you plesase tell how can i achive this.
Regards,
Prabhakar J.

Please re-post if this is still an issue to the .NET Development - Crystal Reports Forum or purchase a case and have a dedicated support engineer work with you directly

How to use AcroPDF.dll even if addon is deactivated in InternetExplorer

Hello,
hopefully someone can help me with my problem:
I need to instantiate AcroPDF.dll and have it deactivated at the same time in InternetExplorers Addon-settings.
But when I deactive the addon in IE, CreateObject("AcroPDF.PDF.1") throws an error that the instance could not be created, but the dll is still registered.
How does this deactivation work technically? Is there any way to use the dll in other applications regardless of the IE-settings?
Best regards and thanks in advance,
Thomas

For programming issues you should use the forum for Acrobat SDK.

How to use CRAXDDRT.DLL in crystal report 2008?

Hello All,
We have purchased Crystal report 2008 Full software.
We need to insert BLOB field into Crystal report 2008 at runtime using *CRAXDDRT.DLL*.
How can I insert OLE object and bind it at Runtime using crystal report 2008?
Is it possible to insert Ole Object runtime using crystal report 2008? If yes how and if not is there alternative to perform this job.
Please let me know your feedback.
Thanks

CrxDDrt.dll is only provided in order for the Crystal Reports designer in the .NET IDE.
1) You are not licensed to use this CraxDDrt.dll
2) Even if you were, in previous versions of CR, there were licensing implications to using the craxDDrt.dll (read $$)
3) Once your project would be done, using CR 2008, you would not be able to distribute the runtime as there is no CR MSM or MSI that contains the craxDDrt.dll and it's supporting runtime.
In your original post you say:
"I need to show Word and Pdf file in to Crystal report 2008 using CRAXDDRT.DLL";
I do not understand why you'd need to do this using the craxddrt.dll? You should be able to insert a BLOB field using the RAS SDK for .NET and CR 2008. Now, one hting you will have to keep in mind. If you insert a multipage .doc or .pdf file into the report, you will only get the first page of that document. I suggest you try this in the CR designer first. Always remember that if you can not do a certain thing in the designer, you will not be able to do it at runtime either. Giving all the limitations above, if you are still interested in doing this using RAS, let me know and I'll set you up with some resources to get you going.
Ludek

Build a DLL in LabVIEW & Use the DLL in LabVIEW

I am trying to build a DLL for the simple vi with LabVIEW and want to use the DLL in LabVIEW. is it impossible?
I wrote a vi and it have 2 terminals. one is the input for numeric dbl data type and one another is the output for numeric dbl 1D array data type.
It was built with the Application builder for LabVIEW 8.0 and DLL was created successfully.
I want to use this DLL in new vi with LabVIEW.
Call library function used. I wrote a new vi to use that DLL.
In config dialog I config each parameter for dll and connected terminals. but it doesn't work
pleas refer to the attatched file and let me know what I missed.
Attachments:
Array1D.zip ‏60 KB

At first I kept scratching my head wondering why someone would want to do this. Create a DLL in LabVIEW to call it from LabVIEW. Seems redundant. But, perhaps it's an exercise or perhaps it's for testing the DLL...
In any event, calling the DLL worked for me in 8.2. How are you configuring your Call LIbrary Function node? I have it set up as follows:
return type: void
iteration: Numeric, Signed 32-bit Integer, pass by value
array1D2: array type, Signed 32-bit Integer, 1 dimension, "Array Data Pointer" format
len: Numeric, Signed 32-bit Integer, pass by value
Then I called the DLL like this:
Message Edited by smercurio_fc on 03-16-2007 12:57 PM
Attachments:
Example_BD.png ‏2 KB

How to use COM DLL in LabWindows

Hello
I have a COM .dll which looks like that when opened with dll export viewer:
I would like to use the Get4AxisPos function in LabWindows.
I understood that, as I only have the .dll, the only way of calling these functions are with the LoadLibrary() and GetProcAddress() functions.
My problem is that the Get4AxisPos function is not of type Exported Function but COM Method so I don't know how to use it in my LabWindows project!
My questions are: Is it possibleto use this dll in Labwindows? If yes how?
Thanks
Solved!
Go to Solution.

Hi ,
I am new to C++ and COM .
i need to implement a client application in C(lab windows CVI) , server is a c++ COM object.
steps followed by me
---> accessed the registered COM object with Labwindows CVI active x controller template,output was a c file which is implementation of the class names in COM (interfaces).
I can use majority of the functions directly from the generated, but i need to implement some event functions like message box events and then use it.
I have seen one method of accessing in C++ client sample ,
which implements Queryinterface function...takes the IID_Unknown as input and returns interface pointer(inhereted static_castof the required class, uses static_cast for that) as output.
when i try to follow up the same in c , i am lost with the inheritance concept.
In short i need to send IID Unknown to the Queryinterface function and should get the interface pointer of message box type or other class type ...
Sorry for the long mail,Please guide me
Thanks in advance ,
Satish

Using a DLL or .so in a JNLP-launched applet

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