About accessing Client Webcam From Applet

Hello friends
I have Written an applet that will be downloaded on client side and access client webcam and show the Images coming of the Client webcam on the Client side only .but when i test that programm on LAn it works fine
But when i upload it on my compnies server and try to run it through Internet It is not working
Any Help about this topic please mail me at
[email protected]
thanks & regards
Harit Bhatt

Hi ,
Pls let us know what is the error or message that u get in ur applet console.
I thing it might be due to the proxy server security restrictions thru with ur trying to access the net.
Regards
Jeyanth

Similar Messages

Accessing EJB's from Applet

Hai friends,
I want to access the ejb form the applet is it possible ?
if passible please let me know how we access?
Please send souce code to this id
[email protected]
Ok Friends i am wating for replys

Is it possible to access EJB's from applet?Yes, but not recommended.
if Yes,Please let me know how will happen and also if
possible send me the peace of source code for this.
mail id is : [email protected]
Are you inviting spam by passing your mail id?
Google and find out how EJB lookups are performed.

Basic question about accessing card reader from browser

Hi,
I am very new to card technology. I have a very basic and general question not directly related to java cards.
I need to write a web application that allows the user to read a card with a card reader.
For that I maybe need to write an applet that has to access a native DLL and call methods
to get the card ID. I already have that DLL (written in Delphi) that reads multi-technology cards.
Then pass that ID to the application server to retrieve complete information
about the card holder and display them on the user browser.
Please could someone guide me on useful resources for that kind of development, for example
already existing developments, personal experience, design solutions ?
Thanks.
Adriano

Hi Joseph,
One thing I forgot to tell is that I work with contactless cards and readers.
Contactless cards use radio frequency. Despite this fact, the problem stays the same. I already have a Delphi DLL that reads contactless cards.
What I need is a way to retrieve card holder information from a client browser. The card contains a unique ID. My idea is to use an applet that reads that ID on the client-side and then calls a servlet on the server-side to retrieve holder information associated with that ID, i.e. first and last names, and finally displays them on the client browser.
So the card contains only the unique ID, a database on the server-side contains all other related data.
Technically the applet has to call the DLL via JNI.
Do you think that using an applet that way is a good solution, do you see simpler solutions, is there security issues ?
Thanks.

Loading client libraries from Applet

All -
1) Can a Signed Applet load libraries that are installed in the Client machine with out altering the policy/permission in the client machine.
2) Does making the signed applet .jar as signed .cab file help the above problem at least in Internet Explorer?
3) If the only option is for the client to alter security in the local machine which is the preferred location?
- (a) /lib/security/java.security under JRE installation
- (b) /Document & Settings/<user>/.java.policy
Appreciate all your time
-cheers
Anoop

1) Yes
2) No. Making a jar uses one set of tools either from Sun or Netscape. Making a cab uses MS tools which I believe are not compatible with SUN java.
3) Option A - because you only have to change that one spot and ALL those who log on will get the same rights which makes it less of a maintenance hassle for you.

Sub: code for accessing 4 webcams from the usb ports

sir ,
i want to connect 4 webcams in the system and access these four cams symultaneousely . how can i do that using java...
by ,johnpaul

> sir ,
Are you aware of the fact that there are female developers as well?
> i want to connect 4 webcams in the system and
access these four cams symultaneousely . how can i do
that using java...
A good place to start is you favorite search engine.
For example:
http://www.google.com/search?hl=en&lr=&q=java+webcam&btnG=Search

Access native methods from an applet

hi all
I am developping a applet which has to access the native method which is c++ code. but it does not work at all, even though it can be compiled well.
it returns
java.lang.ExceptionInInitializerError
     at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
     at sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source)
     at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source)
     at java.lang.reflect.Constructor.newInstance(Unknown Source)
     at java.lang.Class.newInstance0(Unknown Source)
     at java.lang.Class.newInstance(Unknown Source)
     at sun.applet.AppletPanel.createApplet(Unknown Source)
     at sun.plugin.AppletViewer.createApplet(Unknown Source)
     at sun.applet.AppletPanel.runLoader(Unknown Source)
     at sun.applet.AppletPanel.run(Unknown Source)
     at java.lang.Thread.run(Unknown Source)
Caused by: java.security.AccessControlException: access denied (java.lang.RuntimePermission loadLibrary.MemoInfo)
     at java.security.AccessControlContext.checkPermission(Unknown Source)
     at java.security.AccessController.checkPermission(Unknown Source)
     at java.lang.SecurityManager.checkPermission(Unknown Source)
     at java.lang.SecurityManager.checkLink(Unknown Source)
     at java.lang.Runtime.loadLibrary0(Unknown Source)
     at java.lang.System.loadLibrary(Unknown Source)
     at InfoShow.<clinit>(InfoShow.java:24)
     ... 11 more
who can give me some suggestions on accessing native method from applet! thx
regards
beginner

you don't have access to native code from an applet unless you've modified your policy file or you're using a signed applet.

A new webcam with applets problems

hi
I have some doubt abot webcam with applets
here are my questions......
1. There is client(s) and server systems.....
webcam is connected to clientside and image from webcam should be captured from
client(s) and to be sent to server ,through web only. Is there are any possibilities to do this
thing without applets..?
if so please tell me abt that..
2. with applets is there any methods to access client webcam without using signed aplets and
certificating (IE such as setting browser are some settings allow all applets in client machine .etc)
3. i heard about we can have our own signature and certificates (without aproved by any CA)
is it possible if so how can we achive that..?
Im a student doing my projects,I have gone through several applets and webcam related JMF forums but all are old dated and may be new technologies arrived and I couldnot able make clear my doubts comfortably...
sorry for rising old topic but
it wold be gracefull if anybody clear my doubts please kindly give me the ans.
thanks in advance

Hi
Let me take a crack at this, :)
1) No
2)Anything that is required to access anything of a clients computer, i.e com ports,files and resources needs a signed applet.
3)http://java.sun.com/developer/technicalArticles/Security/Signed/
And yes you have to work with
http://java.sun.com/products/java-media/jmf/
in order to capture images
HTH
:)

How read a file from applet?

Hello.
I have an applet which is in a signed jar file. And a configuration xml file. All I want to do is to put it near the jar file and access to it from applet. But applet cannot find it. I just want to read it simply. Also I don�t want to put it in a specified location on the server and want to have it near the jar file.
Thanks very much.

Check the API doc for Applet (that's java.applet.Applet). You call myApplet.getDocumentBase() to get the base URL (directory). I believe the base URL returned is actually the base URL of the HTML doc which your applet is embedded in. Add your xml filename to the end of the path. Then look at the API doc for java.net.URLConnection. You can call myURLConnection.getInputStream() to get an input stream of your xml.
Nick

Applet does not get client certificate from browser (Firefox, IE7)

I'm writing a web service which runs Tomcat through Apache. One critical requirement is that the service be able to invoke certain device drivers on the end user's machine. Fortunately, there is a Java API for this, so this requirement can be fulfilled using an applet.
Here's the problem. This is a B2B application, so we're using SSL and requiring client authentication. I'm no web security guru, but I managed to get SSL set up through Apache (with a self-signed certificate for now; we'll get a real one from a real CA when we're ready to go to production). I also managed to set up client authentication by creating my own CA and generating a client certificate, which I then copied to my test client (Win XPSP2) and imported into both Firefox (2.0.0.15) and IE (6.0.2900). The applet is signed with a real certificate, and that causes no problems. And all of the pages for my web service work as expected.
All except one. The page which is supposed to load the applet pops a dialog stating 'Identification required. Please select certificate to be used for authentication', and presents a list of zero certificates.
Actually, I get this dialog in Firefox on my XPSP2 box, and also when I test on a Vista Home Premium box running IE 7.0.6000. Puzzlingly, this behavior does NOT occur on my XPSP2 box when running through IE 6.0. It seems that with XPSP2 and IE 6.0, the JVM can manage to obtain the required client certificate from the browser and pass it along to Apache, but the JVM can't do this when running in Firefox or in IE 7.0 on Vista.
I have gone to the Java Control Panel and verified that the 'Use certificates and keys in browser keystore' option is selected on both boxes.
I've done a fair amount of research for this (including in this forum) and see that this appears to be a chronic difficulty with applets. What makes it worse is that I don't think I can use the standard workaround, which is to download the applet from a different host/virtual host, because the applet needs to communicate with the web service. Since we have the additional layer of Tomcat container-managed user authentication, the applet needs to be communicating with the server using the same session token as everything else.
So at this point, I'm stuck. Does anyone know a solution to this problem? Two thoughts (I'm reaching at straws here):
1) I have the certificate imported in both Firefox and IE as a 'personal' certificate. Is there someplace else I can put it so the JVM will know how to find it? A rather old thread in this forum mentioned something about setting properties in the Java Control Panel, but I see no place in the JCP to specify such properties, so I'm guessing that solution is no longer operative.
2) I'm using a trick I found on the internet to make the applet load cleanly with both Firefox and IE, namely, I'm using the <OBJECT> tag to specify the applet class and codebase for IE, and then using <COMMENT><EMBED ... /></COMMENT> within the <OBJECT> declaration to specify the information for Firefox. Is there some other way of doing the markup that will give the JVM a hint that it should get a certificate from the browser?
BTW . . . I would hate to drop support for Firefox, but if someone has an IE-only solution, I'll take it. Unfortunately, I reckon a Firefox-only solution would not fly.
Thanks all.

My applet is also signed by a valid certificate. The question of whether the applet is signed/self-signed/unsigned >isn't an issue --- I just wanted you to make sure the Applet runs because it is a know valid Java2 Applet that is 100% signed properly and verified to run.
This eliminates the possibility that it is a JVM issue. However after reading your message further I am afraid
it is not relevant to your issue.
due to the client authentication, my browser (Firefox, IE7) refuses to even download the applet.
I went to your site, and I can see your applet in both Firefox and IE6. However, I don't believe your site is set up >quite like mine, because it appears I can run your applet whether I have imported your X509 certificate or not. What I >did was:If that is true we are all dead :) No I think you just missed the cert in the IE databse. It doesn't have to be in the
Applet database to function. Surprise!
Check your IE/tools/internet options/content tab/certificates/trusted root certification authorities.
I then opened the Java control panel and verified that the certificate isn't listed there, either. So unless the certificate >is being cached/read from some other location (which could be, this certificate stuff is largely black magic to me), >then your server isn't requiring client authentication, either accidentally or by design.No HyperView is a valid java2 Applet and actually writes to a file "hyperview.dat" though it is probably empty.
If you click on a component in the view and then on the view and type "dumpgobs" it shoud write out some data about the current graphics objects so you can see it has complete read/write access..
Further it opens up a complete NIO server ands starts listening for connections on a random port
(Echoed in your java console) You can connect to it with telnet and watch impressive ping messages all day :)
This all goes back to a few years BTW back before there was a plugin and there was only Netscape & IE.
There are actually 2 certificate databases and what loads where depends on which type of cert you are using. Now self signed or not doesn't matter but what does matter is the type of certificate. IE: is it RSA/DSA/Sha1
etc. The Netscape DB was a Berkley DB and MS used whatever they use. The Cert is a DSA/Sha1 cert
which I like the best ATM as it (X fingers it stays so) always has worked.
Sadly that tidbit doesn't help you either I am afraid.
What I'm trying to do is require client authentication through Apache by including the following markup in a virtual >host definition:
SSLCACertificateFile D:/Certificates/ca.crt
SSLVerifyClient require
SSLVerifyDepth 1You got me there I avoid markup at all costs and only code in C java and assembler :)
Now unless I am wrong I think you are saying that you want the Applet to push the certificate to the server
automatically and I don't think this happens. Least I have never heard of this happening from an Applet automatically.
On my client machine, I have a certificate which was generated using OpenSSL and the ca.crt file listed. Testing >shows that the server is requiring a certificate from the client, and the web browser is always providing it.
The problem is that when the browser fires up the Java plugin to run an applet, there is not sufficient communication >between the browser and the plugin so that the plugin can obtain the certificate from the browser and provide it to >the server.
So the server refuses to send the applet bytecode to the JVM, and we're stuck.In terms of implementation ease I think you may have the cart before the horse because I think it would be far easier to run an Applet in the first place to do the authentication, and then send, for example, a jar file to bootstrap and run
(or some classes) in the event the connection is valid. Then again one never knows it all and there may be some classes which enables the plugin as you wish. I have never heard of this being done with the plugin the way you suggest.
I am thinking maybe there is another method of doing this I do not know.
Did you try pushing the cert via JavaScript/LIveConnect?? That way it could run before the Applet and do the authentication.
Maybe someone else has other ideas; did you try the security forum??
Sorry but I am afraid that is not much help.
I did snarf this tidbit which may have some relevance
The current fix for this bug in Mantis and 1.4.1_02 is using JSSE API, Here are the step:
In Java control panel, Advanced tab -> Java Runtime Parameters, specify:
-Djavax.net.ssl.keyStore=<name and path to client keystore file>
-Djavax.net.ssl.keyStorePassword=<password to access this client keystore file>
If it is a PKCS12 format keystore, specify:
-Djavax.net.ssl.keyStoreType=PKCS12
In our future JRE release 1.5, we will create our own client authentication keystore file for JPI and use that for client authentication, for detail info, please see RFE 4797512.
Dennis
Posted Date : 2005-07-28 19:55:50.0Good Luck!
Sincerely:
(T)
Edited by: tswain on 23-Jul-2008 10:07 AM

Accessing RS232 Port (Comm Port) from Applet

I have an interesting "problem". I would like to create an applet that allows me to read the Comm port of the client machine but obviously I get a security exception when I try to do this. Firstly is this possible (I know it can be done from an application)? If so, how would I go about doing it?
Thanks,
Rishi

you need to install the jre, and place the win32.dll at JavaSoft\JRE\1.3.1_06\bin, that properties file place at JavaSoft\JRE\1.3.1_06\lib, comm.jar at JavaSoft\JRE\1.3.1_06\lib\ext\
and in ur code try to use it to open ur com port
public String test() {
          String drivername = "com.sun.comm.Win32Driver";
          try
               CommDriver driver = (CommDriver) Class.forName(drivername).newInstance(); driver.initialize();
          catch (Throwable th)
               {* Discard it */}
          drivername = "javax.comm.*";
          try
               CommDriver driver = (CommDriver) Class.forName(drivername).newInstance(); driver.initialize();
          catch (Throwable th)
               {* Discard it */}
portList = CommPortIdentifier.getPortIdentifiers();
while (portList.hasMoreElements()) {
portId = (CommPortIdentifier) portList.nextElement();
if (portId.getPortType() == CommPortIdentifier.PORT_SERIAL) {
if (portId.getName().equals("COM2")) {
//if (portId.getName().equals("/dev/term/a")) {
try {
serialPort = (SerialPort)
portId.open("SimpleWriteApp", 2000);
} catch (PortInUseException e) {}
try {
outputStream = serialPort.getOutputStream();
} catch (IOException e) {}
try {
serialPort.setSerialPortParams(9600,
SerialPort.DATABITS_8,
SerialPort.STOPBITS_1,
SerialPort.PARITY_NONE);
} catch (UnsupportedCommOperationException e) {}
                         int i=0;
                         while(true)
     try {
                                   messageString="hi";
                                   System.out.println(i++);
     outputStream.write(messageString.getBytes());
     } catch (IOException e)
                                   System.out.println(e);
                                   messageString=String.valueOf(e);
          return messageString;
and yet u need to signed the applet
1.     Compile the applet
2.     Create a JAR file
3.     Generate Keys
4.     Sign the JAR file
5.     Export the Public Key Certificate
6.     Import the Certificate as a Trusted Certificate
7.     Create the policy file
8.     Run the applet
Susan
Susan bundles the applet executable in a JAR file, signs the JAR file, and exports the public key certificate.
1.     Compile the Applet
In her working directory, Susan uses the javac command to compile the SignedAppletDemo.java class. The output from the javac command is the SignedAppletDemo.class.
javac SignedAppletDemo.java
2.     Make a JAR File
Susan then makes the compiled SignedAppletDemo.class file into a JAR file. The -cvf option to the jar command creates a new archive (c), using verbose mode (v), and specifies the archive file name (f). The archive file name is SignedApplet.jar.
jar cvf SignedApplet.jar SignedAppletDemo.class
3.     Generate Keys
Susan creates a keystore database named susanstore that has an entry for a newly generated public and private key pair with the public key in a certificate. A JAR file is signed with the private key of the creator of the JAR file and the signature is verified by the recipient of the JAR file with the public key in the pair. The certificate is a statement from the owner of the private key that the public key in the pair has a particular value so the person using the public key can be assured the public key is authentic. Public and private keys must already exist in the keystore database before jarsigner can be used to sign or verify the signature on a JAR file.
In her working directory, Susan creates a keystore database and generates the keys:
keytool -genkey -alias signFiles -keystore susanstore -keypass kpi135 -dname "cn=jones" -storepass ab987c
This keytool -genkey command invocation generates a key pair that is identified by the alias signFiles. Subsequent keytool command invocations use this alias and the key password (-keypass kpi135) to access the private key in the generated pair.
The generated key pair is stored in a keystore database called susanstore (-keystore susanstore) in the current directory, and accessed with the susanstore password (-storepass ab987c).
The -dname "cn=jones" option specifies an X.500 Distinguished Name with a commonName (cn) value. X.500 Distinguished Names identify entities for X.509 certificates.
You can view all keytool options and parameters by typing:
keytool -help
4.     Sign the JAR File
JAR Signer is a command line tool for signing and verifying the signature on JAR files. In her working directory, Susan uses jarsigner to make a signed copy of the SignedApplet.jar file.
jarsigner -keystore susanstore -storepass ab987c -keypass kpi135 -signedjar SSignedApplet.jar SignedApplet.jar signFiles
The -storepass ab987c and -keystore susanstore options specify the keystore database and password where the private key for signing the JAR file is stored. The -keypass kpi135 option is the password to the private key, SSignedApplet.jar is the name of the signed JAR file, and signFiles is the alias to the private key. jarsigner extracts the certificate from the keystore whose entry is signFiles and attaches it to the generated signature of the signed JAR file.
5.     Export the Public Key Certificate
The public key certificate is sent with the JAR file to the whoever is going to use the applet. That person uses the certificate to authenticate the signature on the JAR file. To send a certificate, you have to first export it.
The -storepass ab987c and -keystore susanstore options specify the keystore database and password where the private key for signing the JAR file is stored. The -keypass kpi135 option is the password to the private key, SSignedApplet.jar is the name of the signed JAR file, and signFiles is the alias to the private key. jarsigner extracts the certificate from the keystore whose entry is signFiles and attaches it to the generated signature of the signed JAR file.
5: Export the Public Key Certificate
The public key certificate is sent with the JAR file to the whoever is going to use the applet. That person uses the certificate to authenticate the signature on the JAR file. To send a certificate, you have to first export it.
In her working directory, Susan uses keytool to copy the certificate from susanstore to a file named SusanJones.cer as follows:
keytool -export -keystore susanstore -storepass ab987c -alias signFiles -file SusanJones.cer
Ray
Ray receives the JAR file from Susan, imports the certificate, creates a policy file granting the applet access, and runs the applet.
6.     Import Certificate as a Trusted Certificate
Ray has received SSignedApplet.jar and SusanJones.cer from Susan. He puts them in his home directory. Ray must now create a keystore database (raystore) and import the certificate into it. Ray uses keytool in his home directory /home/ray to import the certificate:
keytool -import -alias susan -file SusanJones.cer -keystore raystore -storepass abcdefgh
7.     Create the Policy File
The policy file grants the SSignedApplet.jar file signed by the alias susan permission to create newfile (and no other file) in the user's home directory.
Ray creates the policy file in his home directory using either policytool or an ASCII editor.
keystore "/home/ray/raystore";
// A sample policy file that lets a JavaTM program
// create newfile in user's home directory
// Satya N Dodda
grant SignedBy "susan"
     permission java.security.AllPermission;
8.     Run the Applet in Applet Viewer
Applet Viewer connects to the HTML documents and resources specified in the call to appletviewer, and displays the applet in its own window. To run the example, Ray copies the signed JAR file and HTML file to /home/aURL/public_html and invokes Applet viewer from his home directory as follows:
Html code :
</body>
</html>
<OBJECT classid="clsid:8AD9C840-044E-11D1-B3E9-00805F499D93"
width="600" height="400" align="middle"
codebase="http://java.sun.com/products/plugin/1.3/jinstall-13-win32.cab#Version=1,3,1,2">
<PARAM NAME="code" VALUE="SignedAppletDemo.class">
<PARAM NAME="archive" VALUE="SSignedApplet.jar">
<PARAM NAME="type" VALUE="application/x-java-applet;version=1.3">
</OBJECT>
</body>
</html>
appletviewer -J-Djava.security.policy=Write.jp
http://aURL.com/SignedApplet.html
Note: Type everything on one line and put a space after Write.jp
The -J-Djava.security.policy=Write.jp option tells Applet Viewer to run the applet referenced in the SignedApplet.html file with the Write.jp policy file.
Note: The Policy file can be stored on a server and specified in the appletviewer invocation as a URL.
9.     Run the Applet in Browser
Download JRE 1.3 from Javasoft
good luck! [email protected]
i already give u many tips, i use 2 weeks to try this to success, hopw that u understand that, a result of success is not important, the process of how to get things done is most usefull!

WHY can't I access my database from an applet???????????

The security code won't let my applet access its own database (from its own server)..
I'm using getDocumentBase()
to try and tell it that it is my own damn file..
I keep getting :
java.securityAccessControlException: access denied <java.util.PropertyPermission jdbc.drivers write>
...etc.
This applet crap is really starting to piss me off. I can see why they came out with JSP.
All I need to do is access my database, update it, etc. It kind of defeats the purpose of being able to do jdbc from applets if you can't even access the database on your own damn server.
If you all don't have a clue, I'm freakin switching to PHP--I'm tired of this crap-I was thinking Java was a damn good language until I hit applets.

The simple answer to your question is: Because of security concerns.
The somewhat longer answer is that directly accessing a database from an applet is generally not a good idea. A lot of security-critical code like DB username/password must be hidden in the applet which potentially can be downloaded (and disassembled) by anyone that hits your webpage. Maybe you do an intranet solution with trusted users but that is not what applets were originally designed for.
The clean way is to make your applet talk to a servlet that talks to your database.
If that is not the way you want to do it, make sure that all client policy files (yes, on the browser machine) contain the permissions that your applet needs.

About Calling PHP from Applet

I'm developing a web page which incorporate applet. Now i want to call php(server side) from applet. It's ruuning good when the client is working in Direct Internet Connection. If client accessing internet from proxy ...how can i call the php
With Regards
Santhosh

got answer :)..if any one need help post ur queries in this question.

RE: Accessing multiple Env from single Client-PC

Look in the "System Management Guide" under connected environments page
72. This will allow services in your primary environment to find
services in your connected environment. However, there is a bug
reported on this feature which is fixed in 2F4 for the HP and H1 for all
other servers. The following is from Forte:
The connected environments bug that was fixed in 2F4 is #24282. The
problem
was in the nodemgr/name server source code and caused the following to
occur:
Service1 is in connected envs A and B.
Client has env A as primary, B as secondary.
Envmgr A dies before the client has ever made a call to Service1.
Afer env A is gone, client makes a call to Service1 which causes Envmgr
B to
seg fault.
You should upgrade your node manager/env manager nodes to 2F4. The 2F2
development and runtime clients are fully compatible with 2F4 servers.
Kal Inman
Andersen Windows
From: Inho Choi[SMTP:[email protected]]
Sent: Monday, April 21, 1997 2:04 AM
To: [email protected]
Subject: Accessing multiple Env from single Client-PC
Hi, All!
Is there anybody has any idea to access multiple environments from
single client-PC? I have to have multiple environments because each
environment resides geographically remote node and network bandwidth,
reliability are not good enough to include all the systems into single
environment.
Using Control Panel for doing this is not easy for those who are not
familiar with Windows. The end-user tend to use just single application
to access all necessary services.
I could consider two option to doing this:
1. Make some DOS batch command file to switch different environment
like, copying back/forward between environment repositories and
set up forte.ini for changing FORTE_NS_ADDRESS. After then, invoke
proper client partition(ftexec).
2. Duplicate necessary services among each environment.
But, these two options have many drawbacks in terms of system
management(option 1), performance(option 2) and others.
Has anybody good idea to implement this? Any suggestion would be
appreciated.
Inho Choi, Daou Tech., Inc.
email: [email protected]
phone: +82-2-3450-4696

Look in the "System Management Guide" under connected environments page
72. This will allow services in your primary environment to find
services in your connected environment. However, there is a bug
reported on this feature which is fixed in 2F4 for the HP and H1 for all
other servers. The following is from Forte:
The connected environments bug that was fixed in 2F4 is #24282. The
problem
was in the nodemgr/name server source code and caused the following to
occur:
Service1 is in connected envs A and B.
Client has env A as primary, B as secondary.
Envmgr A dies before the client has ever made a call to Service1.
Afer env A is gone, client makes a call to Service1 which causes Envmgr
B to
seg fault.
You should upgrade your node manager/env manager nodes to 2F4. The 2F2
development and runtime clients are fully compatible with 2F4 servers.
Kal Inman
Andersen Windows
From: Inho Choi[SMTP:[email protected]]
Sent: Monday, April 21, 1997 2:04 AM
To: [email protected]
Subject: Accessing multiple Env from single Client-PC
Hi, All!
Is there anybody has any idea to access multiple environments from
single client-PC? I have to have multiple environments because each
environment resides geographically remote node and network bandwidth,
reliability are not good enough to include all the systems into single
environment.
Using Control Panel for doing this is not easy for those who are not
familiar with Windows. The end-user tend to use just single application
to access all necessary services.
I could consider two option to doing this:
1. Make some DOS batch command file to switch different environment
like, copying back/forward between environment repositories and
set up forte.ini for changing FORTE_NS_ADDRESS. After then, invoke
proper client partition(ftexec).
2. Duplicate necessary services among each environment.
But, these two options have many drawbacks in terms of system
management(option 1), performance(option 2) and others.
Has anybody good idea to implement this? Any suggestion would be
appreciated.
Inho Choi, Daou Tech., Inc.
email: [email protected]
phone: +82-2-3450-4696

Accessing multiple Env from single Client-PC

Hi, All!
Is there anybody has any idea to access multiple environments from
single client-PC? I have to have multiple environments because each
environment resides geographically remote node and network bandwidth,
reliability are not good enough to include all the systems into single
environment.
Using Control Panel for doing this is not easy for those who are not
familiar with Windows. The end-user tend to use just single application
to access all necessary services.
I could consider two option to doing this:
1. Make some DOS batch command file to switch different environment
like, copying back/forward between environment repositories and
set up forte.ini for changing FORTE_NS_ADDRESS. After then, invoke
proper client partition(ftexec).
2. Duplicate necessary services among each environment.
But, these two options have many drawbacks in terms of system
management(option 1), performance(option 2) and others.
Has anybody good idea to implement this? Any suggestion would be
appreciated.
Inho Choi, Daou Tech., Inc.
email: [email protected]
phone: +82-2-3450-4696

Hi, All!
Is there anybody has any idea to access multiple environments from
single client-PC? I have to have multiple environments because each
environment resides geographically remote node and network bandwidth,
reliability are not good enough to include all the systems into single
environment.
Using Control Panel for doing this is not easy for those who are not
familiar with Windows. The end-user tend to use just single application
to access all necessary services.
I could consider two option to doing this:
1. Make some DOS batch command file to switch different environment
like, copying back/forward between environment repositories and
set up forte.ini for changing FORTE_NS_ADDRESS. After then, invoke
proper client partition(ftexec).
2. Duplicate necessary services among each environment.
But, these two options have many drawbacks in terms of system
management(option 1), performance(option 2) and others.
Has anybody good idea to implement this? Any suggestion would be
appreciated.
Inho Choi, Daou Tech., Inc.
email: [email protected]
phone: +82-2-3450-4696

Help needed to access Oracle from Applet.

Please help. I have spent days reading info on the web and I simply cannot access to Oracle from an applet to work. Oracle is on a different IP than the Web Server. For my testing I am running the html directly from my local file system.
Here are the steps I have taken:
1. Create a key: "%JAVA_HOME%/bin/keytool" -genkey -alias MyAlias -keypass MyKPass -keystore C:\Keys.bin -storepass MySPass
2. Sign my jar: "%JAVA_HOME%/bin/jarsigner" -keystore C:\Keys.bin -storepass MySPass -keypass MyKPass -signedjar myjar-signed.jar myjar.jar MyAlias
3. Sign Oracle's Jar: "%JAVA_HOME%/bin/jarsigner" -keystore C:\Keys.bin -storepass MySPass -keypass MyKPass -signedjar ojdbc14-signed.jar ojdbc14.jar MyAlias
4. Applet Tag (at this time I have the two jars in the same folder as the HTML and JS files):
    <applet id="MyApp"
codebase=""
archive="myjar-signed.jar,ojdbc14-signed.jar"
code="com/company/applets/Test.class"
mayscript
width="50" height="50">
    </applet>5. Javascript:
document.observe("dom:loaded", function() {
alert("Applet: " + $('MyApp').getVersion());
$('MyApp').getConnection(url, user, pswd);
alert("Applet: " + $('MyApp').getVersion() + "Got Connection.");
$('MyApp').testConnection();
alert("Applet: " + $('MyApp').getVersion() + "Connection Tested.");
});Execution:
1. The applet loads, The browser asks if I want to trust it, I say yes.
2. The '$('MyApp').getVersion()' works.
3. The '$('MyApp').getConnection(url, user, pswd);' fails. Java Code:
public void getConnection(String url, String user, String pswd)
      throws Exception {
    try {
      System.out.println("Driver...");
      DriverManager.registerDriver(new oracle.jdbc.driver.OracleDriver());
      System.out.println("Connection...");
      _conn = DriverManager.getConnection(url, user, pswd);
      ...The driver registers, but the getConnection fails with a security error.
After much reading, I used policytool to update the policy file. It added:
keystore "file:/C:/Keys.bin", "jks";
grant signedBy "MyAlias" {
permission java.security.AllPermission;
};This did not make any difference. Both IE and FF get the same error.
The JRE being used is 1.6.0_14.
Any help solving this would be MUCH appreciated.
Thanks.

I have simplified the problem, and now it has nothing to do with Oracle. It is a certificate/signing problem.
Here are the steps I took to set the test up:
Certificate:
"%JAVA_HOME%/bin/keytool" -genkey -storepass MyStorePswd -keyalg RSA -alias MyRsa -dname "CN=Company.com, OU=IT, O=Company Inc, L=Atlanta, ST=Georgia, C=US, DC=mailexpress, DC=com" -validity 999
"%JAVA_HOME%/bin/keytool" -selfcert -storepass MyStorePswd -alias MyRsa -validity 999
"%JAVA_HOME%/bin/keytool" -exportcert -storepass MyStorePswd -alias MyRsa -rfc -file MyRsa.cer
"%JAVA_HOME%/bin/keytool" -importcert -keystore "C:\Program Files\Java\jre6\lib\security\cacerts." -storepass changeit -alias MyRsa -file MyRsa.cer
Jar Signing:
"%JAVA_HOME%/bin/jarsigner" -storepass MyStorePswd -keypass MyStorePswd -signedjar Text-Project-signed.jar Text-Project.jar MyRsa
"%JAVA_HOME%/bin/jarsigner" -verify Text-Project-signed.jar
Result: jar verified.
HTML:
    <applet id="MyApp"
            codebase="file:/c:/projects/Text-Project/js/Memory"
            archive="Text-Project.jar"           <== unsigned test OR
            archive="Text-Project-signed.jar"    <== signed   test
            code="com/company/applets/MemTest.class"
            mayscript
            width="50" height="50">
    </applet>
JavaScript:
document.observe("dom:loaded", function() {
alert("Applet: " + $('MyApp').checkSecurity());
Function in the Applet:
public String checkSecurity() {
    System.out.println("Security Check...");
    try {
      AccessController.checkPermission(new FilePermission("MemTest.js", "read"));
      AccessController.checkPermission(new FilePermission("MemTest.js", "write"));
      AccessController.checkPermission(new java.net.SocketPermission("192.168.1.121", "resolve"));
    } catch (Exception e) {
      e.printStackTrace();
      return e.getMessage();
    return "Security Checked OK";
}Results (Internet Explorer):
1. Unsigned JAR, No policy:
Result = java.security.AccessControlException: access denied (java.io.FilePermission MemTest.js read)
(as expected)
2. Unsigned JAR, Policy = permission java.security.AllPermission:
Result = Security Checked OK
(as expected)
3. Signed JAR, No Policy: Popup states: signature verified; do you want to run the application.
Result = java.security.AccessControlException: access denied (java.io.FilePermission MemTest.js read)
(not expected)
Something is wrong with the certificate or signing process. Any ideas ?
Thanks.
Edited by: javadude.101 on Jul 29, 2009 12:29 PM

About accessing Client Webcam From Applet

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