-- Prosody IM

-- Copyright (C) 2008-2010 Matthew Wild

-- Copyright (C) 2008-2010 Waqas Hussain

-- 

-- This project is MIT/X11 licensed. Please see the

-- COPYING file in the source package for more information.

--

module:depends("http");

local lfs = require "lfs";

local open = io.open;

local stat = lfs.attributes;

-- TODO: Should we read this from /etc/mime.types if it exists? (startup time...?)

local mime_map = {

	html = "text/html";

	htm = "text/html";

	xml = "text/xml";

	xsl = "text/xml";

	txt = "text/plain; charset=utf-8";

	js = "text/javascript";

	css = "text/css";

};

local function preprocess_path(path)

	if path:sub(1,1) ~= "/" then

		path = "/"..path;

	end

	local level = 0;

	for component in path:gmatch("([^/]+)/") do

		if component == ".." then

			level = level - 1;

		elseif component ~= "." then

			level = level + 1;

		end

		if level < 0 then

			return nil;

		end

	end

	return path;

end

function serve_file(event, path)

	local response = event.response;

	path = path and preprocess_path(path);

	if not path then

		return 400;

	end

	local full_path = http_base..path;

	if stat(full_path, "mode") == "directory" then

		if stat(full_path.."/index.html", "mode") == "file" then

			return serve_file(event, path.."/index.html");

		end

		return 403;

	end

	local f, err = open(full_path, "rb");

	if not f then

		module:log("warn", "Failed to open file: %s", err);

		return 404;

	end

	local data = f:read("*a");

	f:close();

	if not data then

		return 403;

	end

	local ext = path:match("%.([^.]*)$");

	response.headers.content_type = mime_map[ext]; -- Content-Type should be nil when not known

	return response:send(data);

end

module:provides("http", {

	route = {

		["/*"] = serve_file;

	};

});