-- Copyright 2010 Jo-Philipp Wich <jow@openwrt.org>
-- Licensed to the public under the Apache License 2.0.

require "nixio.util"
require "luci.http"
require "luci.sys"
require "luci.dispatcher"
require "luci.ltn12"

function handle_request(env)
	exectime = os.clock()
	local renv = {
		CONTENT_LENGTH  = env.CONTENT_LENGTH,
		CONTENT_TYPE    = env.CONTENT_TYPE,
		REQUEST_METHOD  = env.REQUEST_METHOD,
		REQUEST_URI     = env.REQUEST_URI,
		PATH_INFO	= env.PATH_INFO,
		SCRIPT_NAME     = env.SCRIPT_NAME:gsub("/+$", ""),
		SCRIPT_FILENAME = env.SCRIPT_NAME,
		SERVER_PROTOCOL = env.SERVER_PROTOCOL,
		QUERY_STRING    = env.QUERY_STRING
	}

	local k, v
	for k, v in pairs(env.headers) do
		k = k:upper():gsub("%-", "_")
		renv["HTTP_" .. k] = v
	end

	local len = tonumber(env.CONTENT_LENGTH) or 0
	local function recv()
		if len > 0 then
			local rlen, rbuf = uhttpd.recv(4096)
			if rlen >= 0 then
				len = len - rlen
				return rbuf
			end
		end
		return nil
	end

	local send = uhttpd.send

	local req = luci.http.Request(
		renv, recv, luci.ltn12.sink.file(io.stderr)
	)
	

	local x = coroutine.create(luci.dispatcher.httpdispatch)
	local hcache = { }
	local active = true

	while coroutine.status(x) ~= "dead" do
		local res, id, data1, data2 = coroutine.resume(x, req)

		if not res then
			send("Status: 500 Internal Server Error\r\n")
			send("Content-Type: text/plain\r\n\r\n")
			send(tostring(id))
			break
		end

		if active then
			if id == 1 then
				send("Status: ")
				send(tostring(data1))
				send(" ")
				send(tostring(data2))
				send("\r\n")
			elseif id == 2 then
				hcache[data1] = data2
			elseif id == 3 then
				for k, v in pairs(hcache) do
					send(tostring(k))
					send(": ")
					send(tostring(v))
					send("\r\n")
				end
				send("\r\n")
			elseif id == 4 then
				send(tostring(data1 or ""))
			elseif id == 5 then
				active = false
			elseif id == 6 then
				data1:copyz(nixio.stdout, data2)
			end
		end
	end
end