Want to read Slashdot from your mobile device? Point it at m.slashdot.org and keep reading!

 



Forgot your password?
typodupeerror
Check out the new SourceForge HTML5 internet speed test! No Flash necessary and runs on all devices. ×
User Journal

Journal rjw57's Journal: Sickness

Well I've been playing with embedding Perl within C# and have managed to write the first 'useful' program. The following is a re-write of the LWP simple test program in C#.

namespace PerlEmbedExamples {
    using System;
    using Perl;

    class LWPExample {
        public static void Main(string[] args) {
            Console.WriteLine("Embedding Perl within Mono - LWP Example");
            Console.WriteLine("(C) 2004 Rich Wareham <richwareham@users.sourceforge.net>\n");

            Interpreter interpreter = new Perl.Interpreter();
            interpreter.Embed();

            try {
                interpreter.Require("LWP::UserAgent");
                Scalar ua = interpreter.CallClassMethod("LWP::UserAgent", "new");
                interpreter.CallMethod(ua, "agent", "Mozilla/6.0");
                Scalar req = interpreter.CallClassMethod("HTTP::Request", "new",
                        "GET", "http://example.com/");
                Scalar res = interpreter.CallMethod(ua, "request", req);

                if(interpreter.CallMethod(res, "is_success")) {
                    Scalar content = interpreter.CallMethod(res, "content");

                    Console.WriteLine("Success!");
                    Console.WriteLine("Content:\n{0}", content);
                } else {
                    Console.WriteLine("Request failed.");
                }
            } catch ( Exception e ) {
                Console.WriteLine("Error was thrown: {0}", e.Message);
            }
        }
    }
}

You may well ask "Why bother?". Well actually I've been wanting to write some code in C# for a while but there just aren't enough utility libraries/classes about under sufficiently good licenses. I could do a load of P/Invoke magic to make use of C-libraries but that invoves a) recompiling on each platform and b) only using C-libraries available on multiple platforms. Using Perl gives C# immediate access to the vast wealth of modules on CPAN.

This makes wrapper classes around Perl modules pretty easy to implement :). Also the magic boxing and unboxing ability of C# means that I can use 'Scalar's pretty much just like 'Variants' in VB (which is more or less a good thing, I think).

365 Days of drinking Lo-Cal beer. = 1 Lite-year

Working...