 | When you run this example, I will want to download the Java Plug-in
1.3.0_01 from Sun's site.
Note: It looks like you must have this version. Not
an earlier or later version. I'm not sure why Sun (or whoever) has
designed it this way. |
| At the DOS prompt, execute the program: policytool.exe
 | When you installed the Java Plug-in (includes JRE) this program
was installed also. If you get a bad command, you may want to
specify the full pathname.
Ex: C:\Program Files\JavaSoft\JRE\1.3.0_01\bin\policytool.exe |
|
| Policy Tool Steps: Create a policy file, if one does not exist.
| The first time you run policytool.exe you may get an error: Could
not find policy file: <file name>. That's OK. Make
sure you right down the full pathname of the file name it is looking
for.
Ex: c:\winnt\Profiles\<your user id>\.java.policy
| If you did not have a policy file, the click on File, Save. |
| Next type in the policy file name as it appeared in the error. |
| Now you have a policy file in the default location. |
|
|
| Policy Tool Steps: Create appropriate policies.
| Click on "Add Policy Entry"
| CodeBase = file:/c:/test |
| Signed By: <leave blank> |
|
| Click on "Add Permission" to add the following
permissions.
| File Permission to Read & Write.
| FilePermission |
| Target Name: c:/test/MyAppletWriteFile.txt |
| read, write |
| Click on "OK" |
|
| (Optional) Property Premissions - If you plan to use
the link that runs getDebugProperties(), you will need to
add the following permissions:
| PropertyPermission, user.home, read |
| PropertyPermission, java.home, read |
|
|
| Click on "Done" |
| File, Save. |
|
| Now in your Windows Explorer, launch the web page:
MyAppletWriteFile.html in the c:\test directory.
Warning: While testing, if you make any
changes to the policy file you must exit all browser windows, then
reopen the browser and then the web page.
| On this new web page, click on the first 3 links under "Using
JavaScript with Java Plug-in: (works w/IE)" |
| The 4th link will give Security Errors unless you create the
PropertyPermissions listed above. |
|
| Once you are successful with the above steps, you may try to setup the
policy tool to allow my web page to write to your c:\test directory.
Click Here to
launch the same web page from my site.
Hint: Set up the same permissions above. You will need to
add another policy entry and use the following CodeBase:
http://www.michael-thomas.com/java/javaadvanced/security/javaplugin |
