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POProblem with using signed Applet with policy File
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  1. POProblem with using signed Applet with policy File
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    copied!<p>i have a problem with the .java.policy entries for my applet.</p> <p>I would try to create folders and files with an applet. I had already signed my jar and added in the ${user.home}/.java.policy-file the following lines:</p> <pre><code>grant { permission java.io.FilePermission "&lt;&lt;ALL FILES&gt;&gt;", "read"; permission java.io.FilePermission "&lt;&lt;ALL FILES&gt;&gt;", "write"; }; </code></pre> <p>with this added lines, my applet works great, <strong>but this is not a good style, because every jar at any places becomes the file permissions too</strong>.</p> <p>At the oracle pages are examples to set the codeBase to the specified applet.jar and set the signedBy (the alias wich the jar-file is signed) to grand permissions.</p> <p>I have tried this many times, but it doesn't work.</p> <p>The code i have tried:</p> <pre><code>grant codeBase "http://www.wkmovies.de/appletDemo/-" { permission java.io.FilePermission "&lt;&lt;ALL FILES&gt;&gt;", "read"; permission java.io.FilePermission "&lt;&lt;ALL FILES&gt;&gt;", "write"; }; </code></pre> <p>or</p> <pre><code>grant signedBy "AKlettke" { permission java.io.FilePermission "&lt;&lt;ALL FILES&gt;&gt;", "read"; permission java.io.FilePermission "&lt;&lt;ALL FILES&gt;&gt;", "write"; }; </code></pre> <p>I have uploaded this example to: <a href="http://www.wkmovies.de/appletDemo/index.html" rel="nofollow">www.wkmovies.de/appletDemo/index.html</a></p> <p><strong>How can i set up the policy file, that my applet will work?</strong></p> <hr> <p>Here my code snips: HTML:</p> <pre><code>&lt;a href="javascript:document.applet1.createFolder();"&gt; Create Folder at C:\\Temp &lt;/a&gt; &lt;applet name="applet1" id="applet1" width="0" height="0" alt="" archive="applets/Demo.jar,applets/lib/commons-lang-2.4.jar" code="demo.FolderCreator.class"&gt; &lt;/applet&gt; </code></pre> <p>FolderCreator class:</p> <pre><code>try { File f = new File("C:\\temp"); f.mkdir(); JOptionPane.showMessageDialog(null, "folder created", "successfull", JOptionPane.INFORMATION_MESSAGE); } catch (Exception e) { e.printStackTrace(); JOptionPane.showMessageDialog(null, e.getMessage(), e.getClass().getName(), JOptionPane.ERROR_MESSAGE); } </code></pre> <p>(JDK1.6.0_23, Firefox 3.0.19, WinXP 32bit)</p>
 

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