Mercurial Hosting > luan

local Luan = require "luan:Luan"
local error = Luan.error
local load = Luan.load or error()
local try = Luan.try or error()
local Io = require "luan:Io"
local print = Io.print or error()
local Http = require "luan:http/Http"


local function lines(s)
	local matcher = s.gmatch "([^\n]*)\n|([^\n])+$"
	return function()
		local m1, m2 = matcher()
		return m1 or m2
	end
end

local function print_with_line_numbers(s)
	local i = 1
	for line in lines(s) do
		print(i,line)
		i = i + 1
	end
end

local function form() %>
<html>
	<head>
		<title>Run Luan Code</title>
		<style>
			body {
				font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;
				text-align: center;
				margin-top: 1em;
			}
			h2 {
				margin-bottom: .3em;
				font-weight: normal;
			}
			textarea {
				font: inherit;
				border-radius: 4px;
				padding: .5em .8em;
			}
			input[type="submit"] {
				margin-top: .3em;
				color: white;
				background: #337ab7;
				border-color: #337ab7;
				font: inherit;
				padding: .5em;
				border-radius: 4px;
			}
			input[type="submit"]:hover {
				background: #236aa7 !important;
			}
		</style>
	</head>
	<body>
		<h2>Run Luan Code</h2>
		<form name="form0" method="post">
			<input type="hidden" name="content_type" value="text/plain" />
			<div>
				<textarea name="code" rows="20" cols="90" wrap="off" autofocus></textarea>
			</div>
			<div>
				<input type="submit" value="Execute Luan Code"/>
			</div>
		</form>
	</body>
</html>
<% end

return function()
	Io.stdout = Http.response.text_writer()
	local code = Http.request.parameter.code
	if code == nil then
		form()
		return
	end
	local content_type = Http.request.parameter.content_type
	if content_type ~= nil then
		Http.response.header.content_type = content_type
	end
	local env = {
		request = Http.request;
		response = Http.response;
	}
	try {
		function()
			local run = load(code,"<web_run>",env)
			run()
		end;
		catch = function(e)
			Http.response.header.content_type = "text/plain"
			print(e)
			print()
			print()
			print_with_line_numbers(code)
		end;
	}
end
author	Franklin Schmidt <fschmidt@gmail.com>
date	Tue, 23 Jun 2015 07:57:10 -0600
parents	bfb2c30324c0
children	1e69d9c21461