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java.security.AccessControlException opening from an applet

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  • Subject: java.security.AccessControlException opening from an applet
  • Date: Mon, 24 Apr 2006 16:54:32 +0100
Hello,
 
I'm developing a tool to display netCDF files. The program has two versions, a desktop one and an applet version. When I load from a URL using the applet version java throws this exception:
 
java.security.AccessControlException: access denied (java.io.FilePermission http%3A%2F%2Flocalhost%3A8080%2Fsoftiam-portal%2Fusers%2Fe145%2FIPCC_ESM+Magicc_SCM%2Fmagicc_out.nc read)
 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.checkRead(Unknown Source)
 at java.io.RandomAccessFile.<init>(Unknown Source)
 at java.io.RandomAccessFile.<init>(Unknown Source)
 at ucar.unidata.io.RandomAccessFile.<init>(RandomAccessFile.java:134)
 at ucar.nc2.NetcdfFile.open(NetcdfFile.java:217)
 at ucar.nc2.NetcdfFile.open(NetcdfFile.java:167)
 at ucar.nc2.NetcdfFile.open(NetcdfFile.java:151)
 at softiam.services.ui.dataAnalysis.util.NetCDFReader.<init>(NetCDFReader.java:42)
 at softiam.services.ui.dataAnalysis.engine.SoftiamRepresentation.setNetCDFFile(SoftiamRepresentation.java:130)
 at softiam.services.ui.dataAnalysis.tool.SoftiamAnalyzer.loadURL(SoftiamAnalyzer.java:630)
 at softiam.services.ui.dataAnalysis.tool.SoftiamAnalyzerApplet.init(SoftiamAnalyzerApplet.java:38)
 at sun.applet.AppletPanel.run(Unknown Source)
 at java.lang.Thread.run(Unknown Source)
 
The system uses netCDF 2.2.14 version with slf4j-simple.jar and log4j-1.2.13.jar for Http connections. In a previous version using netCDF 2.1.10 this problem didn't happen. Is there any solution to this problem without having to change java security policy files?
 
Regards,
 
Santi
 
Santiago de la Nava Santos
Software Engineer
Tyndall Centre
Zuckermann Institute
University of East Anglia
Norwich NR4 7TJ
 
Telephone 01603 591377
Fax 01603 593901
E-mail address@hidden