Call report from java with deployment of java web start

Question

I need call report from java,the call function is:execURL ( String pURL )
pURL is a url link to call report from report services .
such as :http://10.20.1.43:8888/reports/rwservlet?destype=cache&desformat=PDF&report=test.rdf&user=scott/tiger@cims
public static void execURL ( String pURL )
String tempstr = new String();
int posIdx = 0;
if ( (System.getProperty("os.name").equals("Windows NT"))||
(System.getProperty("os.name").equals("Windows 2000")) )
posIdx = pURL.indexOf("&");
while ( posIdx > 0 )
tempstr = pURL.substring(0,posIdx)+"^"+pURL.substring(posIdx);
pURL = tempstr;
posIdx = pURL.indexOf("&",posIdx+2);
try
Runtime.getRuntime().exec("cmd /c start "+pURL);
catch (Exception e1) {System.out.println(e1.getMessage()); }
else
try
Runtime.getRuntime().exec("start "+pURL);
catch (Exception e2)
System.out.println(e2.getMessage());
It's run with no problem with deployment of simple jar.
But when i call report with deployment of java web start,it can not.
I think it's java secuity problem,so i add
Permission java.io.FilePermission "c://winnt//system32//cmd.exe", "execute";
in java.policy file in client(windows 20000).However ,it can not too.
Who can help me,Thanks in Advance!

Answer 1

David,
In your code, 'cmd' is invoked as Runtime.getRuntime().exec("cmd /c start "+pURL);
but in your policy file you specify
Permission java.io.FilePermission "c://winnt//system32//cmd.exe", "execute";
Before creating a new process, the security manager checks for FilePermission(cmd,"execute")
if cmd is an absolute path, otherwise it calls checkPermission with
FilePermission("<<ALL FILES>>","execute"). Try specifying
FilePermission("<<ALL FILES>>","execute") in your policy file.
But, I believe using exec, may not be the right solution as it may not work on
other platforms. Also you will have to expect the client m/c to relax security
permission.
Did you consider using java.net.HttpUrlConnection class instead to access the report
service URL?
HTH,
Sathish.