applet to perl cgi

spercy has asked for the wisdom of the Perl Monks concerning the following question:

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Re: applet to perl cgi by CountZero (Bishop) on Mar 25, 2009 at 06:24 UTC
It depends. Where is the applet? Where is the perl-script? Can the applet make a system call to start the perl-script? What do you mean by "also can I invoke a perl program (that gets input from st i/o) from an applet"? How is that different from "I need to invoke perl script from an applet"? What "perl method" are you thinking of invoking? In what language is the applet written? Do you have access to its source code? ... And most important: What have you tried? CountZero A program should be light and agile, its subroutines connected like a string of pearls. The spirit and intent of the program should be retained throughout. There should be neither too little or too much, neither needless loops nor useless variables, neither lack of structure nor overwhelming rigidity." - The Tao of Programming, 4.1 - Geoffrey James	[reply]
Re^2: applet to perl cgi by spercy (Initiate) on Mar 31, 2009 at 07:14 UTC
Hi, thanks for ur reply...to b clear,i have written a perl program for TGDH algorithm..i.e.,whenever a new user joins the dynamic group,a node 'll b created for that user in a tree structure..user entry applet is written in java..only the tree formation program i have written in perl..i need to send the user entry details to be sent to the perl program and the result to b returned to the applet..can any one tell me the format with a simple eg r kindly tell me any reference where i could know abt tat...	[reply]
Re^3: applet to perl cgi by Anonymous Monk on Mar 31, 2009 at 07:28 UTC
Which questions CountZero asked you do you think you are answering?	[reply]
Re: applet to perl cgi by dHarry (Abbot) on Mar 25, 2009 at 09:40 UTC
This is not really a Perl question but a Java security question (I’m assuming you mean Java applets!). I'd say it depends on the version of Java that is used to run the applet. In early versions applets, by design, had many restrictions. They run in the applet sandbox. Therefor it is impossible to read/write files or start programs on the host executing the applet (there are many more restrictions). So it used to be impossible. In the course of time the Java security model was seen as too restrictive and things started to change. Right now, I am not convinced it is impossible but I would strongly recommend against it. The best advice I can give is to rethink the problem! If you insist of running something from an applet I suggest you investigate javasecurity/applets. HTH dHarry	[reply]
Re: applet to perl cgi by dorward (Curate) on Mar 25, 2009 at 09:42 UTC
Since you mention "perl cgi" in the subject line, I'm going to assume you mean: "Cause a Java Applet running in a web browser to cause a web server to run a Perl program using a CGI interface." ... in which case, Perl has very little to do with it. Assuming the server is configured correctly to run the CGI, all you have to do is cause the Applet to issue an HTTP request to the server. That requires you to write Java code, unless the Applet is already capable of making such requests.	[reply]
Re: applet to perl cgi by Anonymous Monk on Mar 25, 2009 at 05:49 UTC
So you're running a web-server in some unspecified location, and you want your web browser to spawn a Perl script running on your client machine when instructed by the applet you've loaded from the remote web-server? The short answer is that you've just asked if it's possible to walk from Sydney to Melbourne. Not 100% sure on that, but I know there are much better ways of achieving the goal..	[reply]


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