Printing from an applet on a Mac

[Vagisha Sharma]

Printing from an unsigned applet is allowed by the java plug-in. When a print request is made it pops up a confirmation dialog after which the print job goes through on Windows. On a Mac, however, a security exception is thrown after the confirmation dialog:

java.security.AccessControlException: access denied (java.net.SocketPermission localhost:631 connect,resolve)

The entire stack trace is copied at the end.

It appears that the applet is trying to open a connection to port 631 on localhost (Port 631 is the standard port for the IPP protocol). Usually an applet is only allowed to open a connection to the host that it came from (not localhost in this case). Therefore, the exception seems reasonable. However, when the print request is sent a second time the print job goes through! I don�t know why!

Has anyone encountered this problem on a Mac (OS 10.4.7; Java version 1.5.0_06) ? Is there a solution?

Thank you.

java.security.AccessControlException: access denied (java.net.SocketPermission localhost:631 connect,resolve)
at java.security.AccessControlContext.checkPermission(AccessControlContext.java:264)
at java.security.AccessController.checkPermission(AccessController.java:427)
at java.lang.SecurityManager.checkPermission(SecurityManager.java:532)
at java.lang.SecurityManager.checkConnect(SecurityManager.java:1034)
at sun.net.www.http.HttpClient.openServer(HttpClient.java:459)
at sun.net.www.http.HttpClient.<init>(HttpClient.java:214)
at sun.net.www.http.HttpClient.New(HttpClient.java:287)
at sun.net.www.http.HttpClient.New(HttpClient.java:299)
at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:792)
at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:744)
at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:669)
at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:836)
at sun.print.IPPPrintService.opGetAttributes(IPPPrintService.java:1419)
at sun.print.IPPPrintService.initAttributes(IPPPrintService.java:323)
at sun.print.IPPPrintService.getSupportedDocFlavors(IPPPrintService.java:697)
at sun.print.IPPPrintService.isDocFlavorSupported(IPPPrintService.java:773)
at sun.print.RasterPrinterJob.getPrintService(RasterPrinterJob.java:431)
at sun.print.RasterPrinterJob.setAttributes(RasterPrinterJob.java:1002)
at apple.awt.CPrinterJob.setAttributes(CPrinterJob.java:130)
at apple.awt.CPrinterJob.print(CPrinterJob.java:173)
at sun.print.RasterPrinterJob.print(RasterPrinterJob.java:1200)
at PrintTest.printApplet(PrintTest.java:47)
at PrintTest$1.actionPerformed(PrintTest.java:25)
at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:1882)
at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2202)
at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:420)
at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:258)
at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(BasicButtonListener.java:234)
at java.awt.Component.processMouseEvent(Component.java:5554)
at javax.swing.JComponent.processMouseEvent(JComponent.java:3126)
at java.awt.Component.processEvent(Component.java:5319)
at java.awt.Container.processEvent(Container.java:2010)
at java.awt.Component.dispatchEventImpl(Component.java:4021)
at java.awt.Container.dispatchEventImpl(Container.java:2068)
at java.awt.Component.dispatchEvent(Component.java:3869)
at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4256)
at java.awt.LightweightDispatcher.processMouseEvent(Container.java:3936)
at java.awt.LightweightDispatcher.dispatchEvent(Container.java:3866)
at java.awt.Container.dispatchEventImpl(Container.java:2054)
at java.awt.Component.dispatchEvent(Component.java:3869)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:463)
at java.awt.EventDispatchThread.pumpOneEventForHierarchy(EventDispatchThread.java:269)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:190)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:184)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:176)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:110)