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How can I create a servlet with jruby (works with a berth)?

I am new to jruby and java and want to create a servlet in jruby using the pier as a web server. I am not sure that I am on the right track with the following code that shows the input form so far. I assume that now I have to extend the HttpServlet class to handle published data, but I do not know how to do this in this case, and if it is normal to do it in the same script.

require 'java' Dir["./jetty-6.1.18/lib/*jar"].each { |jar| require jar } Dir["./Java/lib/jsdk2.1/javax/*jar"].each { |jar| require jar } include_class 'javax.servlet.ServletException' include_class 'javax.servlet.http.HttpServlet' include_class 'javax.servlet.http.HttpServletRequest' include_class 'javax.servlet.http.HttpServletResponse' include_class 'org.mortbay.jetty.Server' include_class 'org.mortbay.jetty.handler.AbstractHandler' include_class 'org.mortbay.jetty.servlet.Context' include_class 'org.mortbay.jetty.servlet.ServletHolder' def main handler = Handler.new server = Server.new(8080) server.setHandler(handler) server.start() end class Handler < AbstractHandler def handle(target, request, response, dispatch) response.setContentType("text/html") response.setStatus(HttpServletResponse::SC_OK) response.getWriter().print(' <form action="RequestProcessing" method="post" enctype="multipart/form-data"> <p>Select a file:<br> <input name="file" type="file" size="20" maxlength="1000" accept="text/*"> </p> <input type="submit" value=" Send"/> </form>') request.setHandled(true) end end class RequestProcessing < HttpServlet # So what do we do here? end main

I would be grateful for any hints. Thank you very much in advance!

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I got some outside help and can imagine the right solution. To offer a complete but simple setup, I use an html file for data entry (but this can be done at the pier, as was done above).

 <?xml version="1.0" ?> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <title>Data input</title> </head> <body> <form action="http://localhost:8080/" method="post"> <textarea name="input" cols="4" rows="20"></textarea> </p> <input type="submit" value=" Send"/> </form> </body> </html>

The jruby part of the confusion is simple;):

 require 'java' Dir["./Java/jetty-6.1.18/lib/*.jar"].each { |jar| require jar } Dir["./Java/lib/jsdk2.1/javax/*.jar"].each { |jar| require jar } include_class 'javax.servlet.http.HttpServlet' include_class 'org.mortbay.jetty.Server' include_class 'org.mortbay.jetty.servlet.Context' include_class 'org.mortbay.jetty.servlet.ServletHolder' def main server = Server.new(8080) context = Context.new(server, '/', 0) servlet = TestServlet.new() holder = ServletHolder.new(servlet) context.addServlet(holder, '/') server.start() end class TestServlet < HttpServlet def doPost(request, response) input = request.getParameter('input') response.writer.println(" <html> <head><title>Output</title></head> <body> Raw input: <pre>#{input}</pre> </body> </html>") request.handled = true end end main

To collect data sent via GET, simply specify doGet in the same way.

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I assume that you are working with an Embedding Jetty document (since you started with a handler).

I would (instead) check this document further and complete the Quick Start - Servlets section. Derive your own servlet from the HttpServlet and implement the doGet()/doPost() methods. You will need to return the form, as you did in the above example.

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I know this is not the answer to your question, but in (J) Ruby-land we tend to use mongrel or webrick instead of a berth.

http://mongrel.rubyforge.org/web/mongrel/files/README.html

http://www.webrick.org/

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