Home | History | Annotate | Line # | Download | only in httpd
printenv.lua revision 1.3 
      1 -- $NetBSD: printenv.lua,v 1.3 2015/12/07 03:11:48 kamil Exp $
      2 
      3 -- this small Lua script demonstrates the use of Lua in (bozo)httpd
      4 -- it will simply output the "environment"
      5 
      6 -- Keep in mind that bozohttpd forks for each request when started in
      7 -- daemon mode, you can set global veriables here, but they will have
      8 -- the same value on each invocation.  You can not keep state between
      9 -- two calls.
     10 
     11 -- You can test this example by running the following command:
     12 -- /usr/libexec/httpd -b -f -I 8080 -L test printenv.lua .
     13 -- and then navigate to: http://127.0.0.1:8080/test/printenv
     14 
     15 local httpd = require 'httpd'
     16 
     17 function printenv(env, headers, query)
     18 
     19 	-- we get the "environment" in the env table, the values are more
     20 	-- or less the same as the variable for a CGI program
     21 
     22 	-- output headers using httpd.write()
     23 	-- httpd.write() will not append newlines
     24 	httpd.write("HTTP/1.1 200 Ok\r\n")
     25 	httpd.write("Content-Type: text/html\r\n\r\n")
     26 
     27 	-- output html using httpd.print()
     28 	-- you can also use print() and io.write() but they will not work with SSL
     29 	httpd.print([[
     30 		<html>
     31 			<head>
     32 				<title>Bozotic Lua Environment</title>
     33 			</head>
     34 			<body>
     35 				<h1>Bozotic Lua Environment</h1>
     36 	]])
     37 
     38 	httpd.print('module version: ' .. httpd._VERSION .. '<br>')
     39 
     40 	httpd.print('<h2>Server Environment</h2>')
     41 	-- print the list of "environment" variables
     42 	for k, v in pairs(env) do
     43 		httpd.print(k .. '=' .. v .. '<br/>')
     44 	end
     45 
     46 	httpd.print('<h2>Request Headers</h2>')
     47 	for k, v in pairs(headers) do
     48 		httpd.print(k .. '=' .. v .. '<br/>')
     49 	end
     50 
     51 	if query ~= nil then
     52 		httpd.print('<h2>Query Variables</h2>')
     53 		for k, v in pairs(query) do
     54 			httpd.print(k .. '=' .. v .. '<br/>')
     55 		end
     56 	end
     57 
     58 	httpd.print('<h2>Form Test</h2>')
     59 
     60 	httpd.print([[
     61 	<form method="POST" action="form?sender=me">
     62 	<input type="text" name="a_value">
     63 	<input type="submit">
     64 	</form>
     65 	]])
     66 	-- output a footer
     67 	httpd.print([[
     68 		</body>
     69 	</html>
     70 	]])
     71 end
     72 
     73 function form(env, header, query)
     74 
     75 	httpd.write("HTTP/1.1 200 Ok\r\n")
     76 	httpd.write("Content-Type: text/html\r\n\r\n")
     77 
     78 	if query ~= nil then
     79 		httpd.print('<h2>Form Variables</h2>')
     80 
     81 		if env.CONTENT_TYPE ~= nil then
     82 			httpd.print('Content-type: ' .. env.CONTENT_TYPE .. '<br>')
     83 		end
     84 
     85 		for k, v in pairs(query) do
     86 			httpd.print(k .. '=' .. v .. '<br/>')
     87 		end
     88 	else
     89 		httpd.print('No values')
     90 	end
     91 end
     92 
     93 -- register this handler for http://<hostname>/<prefix>/printenv
     94 httpd.register_handler('printenv', printenv)
     95 httpd.register_handler('form', form)
     96