Mercurial Hosting > luan

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


local Run = {}

local function lines(s)
	local matcher = gmatch(s,"([^\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() %>
<!doctype html>
<html>
	<head>
		<title>Run Luan Code</title>
		<style>
			body {
				font-family: sans-serif;
				text-align: center;
			}
			textarea {
				font: inherit;
			}
			input[type="submit"] {
				margin-top: .3em;
				color: white;
				background: #337ab7;
				border-color: #337ab7;
				font: inherit;
				padding: .5em;
				border-radius: 4px;
				cursor: pointer;
			}
		</style>
	</head>
	<body>
		<h2>Run Luan Code</h2>
		<form method="post">
			<input type="hidden" name="content_type" value="text/plain; charset=utf-8" />
			<div>
				<textarea name="code" rows="20" cols="90" autofocus></textarea>
			</div>
			<div>
				<input type="submit" value="Execute Luan Code"/>
			</div>
		</form>
	</body>
</html>
<% end

function Run.run(code,source_name)
	return try {
		function()
			local run = load(code,source_name)
			run()
			return true
		end
		catch = function(e)
			Http.response.reset()
			Http.response.headers["content-type"] = "text/plain; charset=utf-8"
			Io.stdout = Http.response.text_writer()
			print(e)
			print()
			print()
			print_with_line_numbers(code)
			return false
		end
	}
end

function Run.respond()
	local content_type = Http.request.parameters.content_type
	if content_type ~= nil then
		Http.response.headers["content-type"] = content_type
	end
	Io.stdout = Http.response.text_writer()
	local code = Http.request.parameters.code
	if code == nil then
		form()
		return
	end
	Run.run(code,"<web_run>")
end

return Run
author	Franklin Schmidt <fschmidt@gmail.com>
date	Mon, 22 Apr 2019 00:38:11 -0600
parents	007ceb8dcf89
children	d9a5405a3102