Pow programming languages

From PlainOldWebserver

This document describes how to run POW in programming languages other than Javascript.

Contents 1 PHP 2 Python 3 Perl 4 TCL 5 Ruby

PHP

First, download and install PHP. In htdocs/system/startup.sjs

  <?sjs
       pow_server.APP_HANDLERS['php']  = '/usr/bin/php';
  ?> 

In the menu, Tools->POW->Options...->Add mime type, add "php text/html Binary=unchecked" to the list if it is not there. Restart POW or close and reopen all browser windows. A script named test.php in the htdocs directory will work.

test.php

  <?php
     echo "Hello world"
  ?> 

Python

First, download and install Python. In htdocs/system/startup.sjs

  <?sjs
       pow_server.APP_HANDLERS['py']  = '/usr/bin/python';
  ?> 

In the menu, Tools->POW->Options...->Add mime type, add "py text/html Binary=unchecked" to the list if it is not there. Restart POW or close and reopen all browser windows. A script named test.py in the htdocs directory will work.

test.py

  print "Hello world"

Perl

First, download and install Perl. In htdocs/system/startup.sjs

  <?sjs
       pow_server.APP_HANDLERS['pl']  = '/usr/bin/perl';
  ?> 

In the menu, Tools->POW->Options...->Add mime type, add "pl text/html Binary=unchecked" to the list if it is not there. Restart POW or close and reopen all browser windows. A script named test.pl in the htdocs directory will work.

test.pl

  print "Hello world!\n";

TCL

First, have TCL shell (tclsh) installed and working. In htdocs/system/startup.sjs

  <?sjs
       pow_server.APP_HANDLERS['tcl']  = '/usr/bin/tclsh';
  ?> 

(put a correct path to your tcl here)

In the menu, Tools->POW->Options...->Add mime type, add "tcl text/html Binary=unchecked" to the list if it is not there. Restart POW or close and reopen all browser windows. A script named test.tcl in the htdocs directory will work. For example, have a script like this:

test.tcl

   puts "Hello, world!"

You can also use this script to reveal all tcl variables set:

tclinfo.tcl

   puts "Content-Type: text/plain; charset=utf-8\n"
   
   foreach i [info vars] {
   	if [array exists $i] {
   		foreach {j k} [array get $i] { puts "[subst $i]($j) = $k" }
   	} else {
   		puts "$i = [subst $$i]"
   	}
   }

Ruby

First, download and install Ruby. In htdocs/system/startup.sjs

  <?sjs
       pow_server.APP_HANDLERS['rb']  = '/usr/bin/ruby';
  ?> 

In the menu, Tools->POW->Options...->Add mime type, add "rb text/html Binary=unchecked" to the list if it is not there. Restart POW or close and reopen all browser windows. A script named test.rb in the htdocs directory will work.

test.rb

  3.times { |i| puts "Hello World from Ruby - #{i}" }

output from http://localhost:6670/test.rb

 Hello World from Ruby - 0
 Hello World from Ruby - 1
 Hello World from Ruby - 2

This uses the CGI library.

 require 'cgi'
 cgi = CGI.new("html4")
 name = cgi.params['name']
 if (name.empty?)
   name = '(no name)'
 end
 cgi.out {
   cgi.html {
     cgi.body {
       cgi.h1 { "Welcome to POW" } +
       cgi.p { "Hello, #{name}!" }
     }
   }
 }

Result from http://localhost:6670/test.rb?name=Dave

 Welcome to POW
 Hello, Dave!