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Java application through proxy Charles

duncanb7
duncanb7 asked
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Last Modified: 2012-07-10
Dear Experts,


I get one applet java application  and I am using it in IE every day.
Now I would like to save the data I want from the application through
the proxy , now I am using Charles debugger proxy.
From the Sun document,http://docs.oracle.com/javase/6/docs/technotes/guides/net/proxies.html, it mention set the java for proxy  at command line.
I tried it at my PC at C:/program files/java/jre7/bin/java -D http.proxyHost=127.0.0.1 -D
http.proxyPort=8888, but it doesn't work, just error Can't find the variable

And I try to use javascript,
<html>
<head>
</head>
<COMMENT><SCRIPT LANGUAGE="JavaScript1.1"><!--
java.lang.System.getProperties().put("http.proxyHost", "127.0.0.1");
java.lang.System.getProperties().put("http.proxyPort", "8888");
 
   var javaVersion = java.lang.System.getProperty("java.version");  
   alert(javaVersion);
//--></SCRIPT></COMMENT>
<body>
</body>
</html>

Firefox reports,
Error: uncaught exception: java.security.AccessControlException: access denied ("java.util.PropertyPermission" "*" "read,write")
and only alert(javaVersion) is working.

I already open or run Charles proxy software and its client adress is set 127.0.0.1:8888
before I do the previous action and  Charles running is fine from IE and Firefox.
But it doesn't show any information data  I want  from my applet application that is
probably related to those proxy setting for Java proxy is not correct.
And my PC I login in as  adminstrative manager mode  already
Any advise to solve the issue, I am not familar with java code  and if provide
the simple code for setting system proxy property for Java that is
strongly welcome.

Please advise
Duncan
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