GSoC Commit #1: LuCId + HTTP-Server

8 files changed, 1094 insertions, 0 deletions

diff --git a/libs/lucid-http/luasrc/lucid/http.lua b/libs/lucid-http/luasrc/lucid/http.lua
new file mode 100644
index 000000000..32ba5791d
--- /dev/null
+++ b/libs/lucid-http/luasrc/lucid/http.lua
@@ -0,0 +1,33 @@
+--[[
+LuCI - Lua Configuration Interface
+
+Copyright 2009 Steven Barth <steven@midlink.org>
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+	http://www.apache.org/licenses/LICENSE-2.0
+
+$Id$
+]]--
+
+local require, ipairs, pcall = require, ipairs, pcall
+local srv = require "luci.lucid.http.server"
+
+module "luci.lucid.http"
+
+function factory(publisher)
+	local server = srv.Server()
+	for _, r in ipairs(publisher) do
+		local t = r[".type"]
+		local s, mod = pcall(require, "luci.lucid.http." .. (r[".type"] or ""))
+		if s and mod then
+			mod.factory(server, r)
+		else
+			return nil, mod
+		end
+	end
+
+	return function(...) return server:process(...) end
+end
\ No newline at end of file
diff --git a/libs/lucid-http/luasrc/lucid/http/DirectoryPublisher.lua b/libs/lucid-http/luasrc/lucid/http/DirectoryPublisher.lua
new file mode 100644
index 000000000..f471781a9
--- /dev/null
+++ b/libs/lucid-http/luasrc/lucid/http/DirectoryPublisher.lua
@@ -0,0 +1,47 @@
+--[[
+LuCId HTTP-Slave
+(c) 2009 Steven Barth <steven@midlink.org>
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+        http://www.apache.org/licenses/LICENSE-2.0
+
+$Id$
+]]--
+
+local ipairs, require, tostring, type = ipairs, require, tostring, type
+local file = require "luci.lucid.http.handler.file"
+local srv = require "luci.lucid.http.server"
+
+module "luci.lucid.http.DirectoryPublisher"
+
+
+function factory(server, config)
+	config.domain = config.domain or ""
+	local vhost = server:get_vhosts()[config.domain] 
+	if not vhost then
+		vhost = srv.VHost()
+		server:set_vhost(config.domain, vhost)
+	end
+
+	local handler = file.Simple(config.name, config.physical, config)
+	if config.read then
+		for _, r in ipairs(config.read) do
+			if r:sub(1,1) == ":" then
+				handler:restrict({interface = r:sub(2)})
+			else
+				handler:restrict({user = r})
+			end
+		end
+	end
+	
+	if type(config.virtual) == "table" then
+		for _, v in ipairs(config.virtual) do
+			vhost:set_handler(v, handler)
+		end
+	else
+		vhost:set_handler(config.virtual, handler)
+	end
+end
\ No newline at end of file
diff --git a/libs/lucid-http/luasrc/lucid/http/LuciWebPublisher.lua b/libs/lucid-http/luasrc/lucid/http/LuciWebPublisher.lua
new file mode 100644
index 000000000..0d0648967
--- /dev/null
+++ b/libs/lucid-http/luasrc/lucid/http/LuciWebPublisher.lua
@@ -0,0 +1,62 @@
+--[[
+LuCId HTTP-Slave
+(c) 2009 Steven Barth <steven@midlink.org>
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+        http://www.apache.org/licenses/LICENSE-2.0
+
+$Id$
+]]--
+
+local ipairs, pcall, type = ipairs, pcall, type
+local luci = require "luci.lucid.http.handler.luci"
+local srv = require "luci.lucid.http.server"
+
+
+module "luci.lucid.http.LuciWebPublisher"
+
+function factory(server, config)
+	pcall(function()
+		require "luci.dispatcher"
+		require "luci.cbi"
+	end)
+
+	config.domain = config.domain or ""
+	local vhost = server:get_vhosts()[config.domain] 
+	if not vhost then
+		vhost = srv.VHost()
+		server:set_vhost(config.domain, vhost)
+	end
+
+	local prefix
+	if config.physical and #config.physical > 0 then
+		prefix = {}
+		for k in config.physical:gmatch("[^/]+") do
+			if #k > 0 then
+				prefix[#prefix+1] = k
+			end
+		end
+	end
+
+	local handler = luci.Luci(config.name, prefix)
+	if config.exec then
+		for _, r in ipairs(config.exec) do
+			if r:sub(1,1) == ":" then
+				handler:restrict({interface = r:sub(2)})
+			else
+				handler:restrict({user = r})
+			end
+		end
+	end
+
+	if type(config.virtual) == "table" then
+		for _, v in ipairs(config.virtual) do
+			vhost:set_handler(v, handler)
+		end
+	else
+		vhost:set_handler(config.virtual, handler)
+	end
+end
\ No newline at end of file
diff --git a/libs/lucid-http/luasrc/lucid/http/Redirector.lua b/libs/lucid-http/luasrc/lucid/http/Redirector.lua
new file mode 100644
index 000000000..c0af90b00
--- /dev/null
+++ b/libs/lucid-http/luasrc/lucid/http/Redirector.lua
@@ -0,0 +1,31 @@
+--[[
+LuCId HTTP-Slave
+(c) 2009 Steven Barth <steven@midlink.org>
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+        http://www.apache.org/licenses/LICENSE-2.0
+
+$Id$
+]]--
+
+local ipairs = ipairs
+local catchall = require "luci.lucid.http.handler.catchall"
+local srv = require "luci.lucid.http.server"
+
+module "luci.lucid.http.Redirector"
+
+
+function factory(server, config)
+	config.domain = config.domain or ""
+	local vhost = server:get_vhosts()[config.domain] 
+	if not vhost then
+		vhost = srv.VHost()
+		server:set_vhost(config.domain, vhost)
+	end
+
+	local handler = catchall.Redirect(config.name, config.physical)
+	vhost:set_handler(config.virtual, handler)
+end
\ No newline at end of file
diff --git a/libs/lucid-http/luasrc/lucid/http/handler/catchall.lua b/libs/lucid-http/luasrc/lucid/http/handler/catchall.lua
new file mode 100644
index 000000000..0523751bc
--- /dev/null
+++ b/libs/lucid-http/luasrc/lucid/http/handler/catchall.lua
@@ -0,0 +1,53 @@
+--[[
+LuCId HTTP-Slave
+(c) 2009 Steven Barth <steven@midlink.org>
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+        http://www.apache.org/licenses/LICENSE-2.0
+
+$Id$
+]]--
+
+local srv = require "luci.lucid.http.server"
+local proto = require "luci.http.protocol"
+
+module "luci.lucid.http.handler.catchall"
+
+Redirect = util.class(srv.Handler)
+
+function Redirect.__init__(self, name, target)
+	srv.Handler.__init__(self, name)
+	self.target = target
+end
+
+function Redirect.handle_GET(self, request)
+	local target = self.target
+	local protocol = request.env.HTTPS and "https://" or "http://"
+	local server = request.env.SERVER_ADDR
+	if server:find(":") then
+		server = "[" .. server .. "]"
+	end
+
+	if self.target:sub(1,1) == ":" then
+		target = protocol .. server .. target
+	end
+
+	local s, e = target:find("%TARGET%", 1, true)
+	if s then
+		local req = protocol .. (request.env.HTTP_HOST or server)
+			.. request.env.REQUEST_URI 
+		target = target:sub(1, s-1) .. req .. target:sub(e+1)
+	end
+
+	return 302, { Location = target }
+end
+
+Redirect.handle_POST = Redirect.handle_GET
+
+function Redirect.handle_HEAD(self, request)
+	local stat, head = self:handle_GET(request)
+	return stat, head
+end
\ No newline at end of file
diff --git a/libs/lucid-http/luasrc/lucid/http/handler/file.lua b/libs/lucid-http/luasrc/lucid/http/handler/file.lua
new file mode 100644
index 000000000..d08e47025
--- /dev/null
+++ b/libs/lucid-http/luasrc/lucid/http/handler/file.lua
@@ -0,0 +1,250 @@
+--[[
+
+HTTP server implementation for LuCI - file handler
+(c) 2008 Steven Barth <steven@midlink.org>
+(c) 2008 Freifunk Leipzig / Jo-Philipp Wich <xm@leipzig.freifunk.net>
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+        http://www.apache.org/licenses/LICENSE-2.0
+
+$Id$
+
+]]--
+
+local ipairs, type, tonumber = ipairs, type, tonumber
+local os = require "os"
+local nixio = require "nixio", require "nixio.util"
+local fs = require "nixio.fs"
+local util = require "luci.util"
+local ltn12 = require "luci.ltn12"
+local srv = require "luci.lucid.http.server"
+local string = require "string"
+
+local prot = require "luci.http.protocol"
+local date = require "luci.http.protocol.date"
+local mime = require "luci.http.protocol.mime"
+local cond = require "luci.http.protocol.conditionals"
+
+module "luci.lucid.http.handler.file"
+
+Simple = util.class(srv.Handler)
+
+function Simple.__init__(self, name, docroot, options)
+	srv.Handler.__init__(self, name)
+	self.docroot = docroot
+	self.realdocroot = fs.realpath(self.docroot)
+
+	options = options or {}
+	self.dirlist = not options.noindex
+	self.error404 = options.error404
+end
+
+function Simple.parse_range(self, request, size)
+	if not request.headers.Range then
+		return true
+	end
+
+	local from, to = request.headers.Range:match("bytes=([0-9]*)-([0-9]*)")
+	if not (from or to) then
+		return true
+	end
+
+	from, to = tonumber(from), tonumber(to)
+	if not (from or to) then
+		return true
+	elseif not from then
+		from, to = size - to, size - 1
+	elseif not to then
+		to = size - 1
+	end
+
+	-- Not satisfiable
+	if from >= size then
+		return false
+	end
+
+	-- Normalize
+	if to >= size then
+		to = size - 1
+	end
+
+	local range = "bytes " .. from .. "-" .. to .. "/" .. size
+	return from, (1 + to - from), range
+end
+
+function Simple.getfile(self, uri)
+	if not self.realdocroot then
+		self.realdocroot = fs.realpath(self.docroot)
+	end
+	local file = fs.realpath(self.docroot .. uri)
+	if not file or file:sub(1, #self.realdocroot) ~= self.realdocroot then
+		return uri
+	end
+	return file, fs.stat(file)
+end
+
+function Simple.handle_GET(self, request)
+	local file, stat = self:getfile(prot.urldecode(request.env.PATH_INFO, true))
+
+	if stat then
+		if stat.type == "reg" then
+
+			-- Generate Entity Tag
+			local etag = cond.mk_etag( stat )
+
+			-- Check conditionals
+			local ok, code, hdrs
+
+			ok, code, hdrs = cond.if_modified_since( request, stat )
+			if ok then
+				ok, code, hdrs = cond.if_match( request, stat )
+				if ok then
+					ok, code, hdrs = cond.if_unmodified_since( request, stat )
+					if ok then
+						ok, code, hdrs = cond.if_none_match( request, stat )
+						if ok then
+							local f, err = nixio.open(file)
+
+							if f then
+								local code = 200
+								local o, s, r = self:parse_range(request, stat.size)
+
+								if not o then
+									return self:failure(416, "Invalid Range")
+								end
+
+								local headers = {
+									["Last-Modified"]  = date.to_http( stat.mtime ),
+									["Content-Type"]   = mime.to_mime( file ),
+									["ETag"]           = etag,
+									["Accept-Ranges"]  = "bytes",
+								}
+
+								if o == true then
+									s = stat.size
+								else
+									code = 206
+									headers["Content-Range"] = r
+									f:seek(o)
+								end
+								
+								headers["Content-Length"] = s
+
+								-- Send Response
+								return code, headers, srv.IOResource(f, s)
+							else
+								return self:failure( 403, err:gsub("^.+: ", "") )
+							end
+						else
+							return code, hdrs
+						end
+					else
+						return code, hdrs
+					end
+				else
+					return code, hdrs
+				end
+			else
+				return code, hdrs
+			end
+
+		elseif stat.type == "dir" then
+
+			local ruri = request.env.REQUEST_URI:gsub("/$", "")
+			local duri = prot.urldecode( ruri, true )
+			local root = self.docroot
+
+			-- check for index files
+			local index_candidates = {
+				"index.html", "index.htm", "default.html", "default.htm",
+				"index.txt", "default.txt"
+			}
+
+			-- try to find an index file and redirect to it
+			for i, candidate in ipairs( index_candidates ) do
+				local istat = fs.stat(
+					root .. "/" .. duri .. "/" .. candidate
+				)
+
+				if istat ~= nil and istat.type == "reg" then
+					return 302, { Location = ruri .. "/" .. candidate }
+				end
+			end
+
+
+			local html = string.format(
+				'<?xml version="1.0" encoding="utf-8"?>\n' ..
+				'<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" '	..
+					'"http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">\n'..
+				'<html xmlns="http://www.w3.org/1999/xhtml" '				..
+					'xml:lang="en" lang="en">\n'							..
+				'<head>\n'													..
+				'<title>Index of %s/</title>\n'								..
+				'<style type="text/css">\n'									..
+					'body { color:#000000 } '								..
+					'li { border-bottom:1px dotted #CCCCCC; padding:3px } '	..
+					'small { font-size:60%%; color:#333333 } '				..
+					'p { margin:0 }'										..
+					'\n</style></head><body><h1>Index of %s/</h1><hr /><ul>'..
+					'<li><p><a href="%s/../">../</a> '						..
+					'<small>(parent directory)</small><br />'						..
+					'<small></small></li>',
+					duri, duri, ruri 
+			)
+
+			local entries = fs.dir( file )
+
+			if type(entries) == "function" then
+				for i, e in util.vspairs(nixio.util.consume(entries)) do
+					local estat = fs.stat( file .. "/" .. e )
+
+					if estat.type == "dir" then
+						html = html .. string.format(
+							'<li><p><a href="%s/%s/">%s/</a> '           ..
+							'<small>(directory)</small><br />'           ..
+							'<small>Changed: %s</small></li>',
+								ruri, prot.urlencode( e ), e,
+								date.to_http( estat.mtime )
+						)
+					else
+						html = html .. string.format(
+							'<li><p><a href="%s/%s">%s</a> '             ..
+							'<small>(%s)</small><br />'                  ..
+							'<small>Size: %i Bytes | '                   ..
+								'Changed: %s</small></li>',
+								ruri, prot.urlencode( e ), e,
+								mime.to_mime( e ),
+								estat.size, date.to_http( estat.mtime )
+						)
+					end
+				end
+
+				html = html .. '</ul><hr /><address>LuCId-HTTPd' .. 
+					'</address></body></html>'
+
+				return 200, {
+						["Date"]         = date.to_http( os.time() );
+						["Content-Type"] = "text/html; charset=utf-8";
+					}, ltn12.source.string(html)
+			else
+				return self:failure(403, "Permission denied")
+			end
+		else
+			return self:failure(403, "Unable to transmit " .. stat.type .. " " .. file)
+		end
+	else
+		if self.error404 then
+			return 302, { Location = self.error404 }
+		else
+			return self:failure(404, "No such file: " .. file)
+		end
+	end
+end
+
+function Simple.handle_HEAD(self, ...)
+	local stat, head = self:handle_GET(...)
+	return stat, head
+end
diff --git a/libs/lucid-http/luasrc/lucid/http/handler/luci.lua b/libs/lucid-http/luasrc/lucid/http/handler/luci.lua
new file mode 100644
index 000000000..c54e39366
--- /dev/null
+++ b/libs/lucid-http/luasrc/lucid/http/handler/luci.lua
@@ -0,0 +1,96 @@
+--[[
+LuCId HTTP-Slave
+(c) 2009 Steven Barth <steven@midlink.org>
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+        http://www.apache.org/licenses/LICENSE-2.0
+
+$Id$
+]]--
+
+local dsp = require "luci.dispatcher"
+local util = require "luci.util"
+local http = require "luci.http"
+local ltn12 = require "luci.ltn12"
+local srv = require "luci.lucid.http.server"
+local coroutine = require "coroutine"
+local type = type
+
+module "luci.lucid.http.handler.luci"
+
+Luci = util.class(srv.Handler)
+
+function Luci.__init__(self, name, prefix)
+	srv.Handler.__init__(self, name)
+	self.prefix = prefix
+end
+
+function Luci.handle_HEAD(self, ...)
+	local stat, head = self:handle_GET(...)
+	return stat, head
+end
+
+function Luci.handle_POST(self, ...)
+	return self:handle_GET(...)
+end
+
+function Luci.handle_GET(self, request, sourcein)
+	local r = http.Request(
+		request.env,
+		sourcein
+	)
+
+	local res, id, data1, data2 = true, 0, nil, nil
+	local headers = {}
+	local status = 200
+	local active = true
+
+	local x = coroutine.create(dsp.httpdispatch)
+	while not id or id < 3 do
+		res, id, data1, data2 = coroutine.resume(x, r, self.prefix)
+
+		if not res then
+			status = 500
+			headers["Content-Type"] = "text/plain"
+			return status, headers, ltn12.source.string(id)
+		end
+
+		if id == 1 then
+			status = data1
+		elseif id == 2 then
+			if not headers[data1] then
+				headers[data1] = data2
+			elseif type(headers[data1]) ~= "table" then
+				headers[data1] = {headers[data1], data2}
+			else
+				headers[data1][#headers[data1]+1] = data2
+			end
+		end
+	end
+	
+	if id == 6 then
+		while (coroutine.resume(x)) do end
+		return status, headers, srv.IOResource(data1, data2)
+	end
+
+	local function iter()
+		local res, id, data = coroutine.resume(x)
+		if not res then
+			return nil, id
+		elseif not id or not active then
+			return true
+		elseif id == 5 then
+			active = false
+			while (coroutine.resume(x)) do end
+			return nil
+		elseif id == 4 then
+			return data
+		end
+	end
+
+	return status, headers, iter
+end
+
diff --git a/libs/lucid-http/luasrc/lucid/http/server.lua b/libs/lucid-http/luasrc/lucid/http/server.lua
new file mode 100644
index 000000000..f5de4e9a1
--- /dev/null
+++ b/libs/lucid-http/luasrc/lucid/http/server.lua
@@ -0,0 +1,522 @@
+--[[
+LuCId HTTP-Slave
+(c) 2009 Steven Barth <steven@midlink.org>
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+        http://www.apache.org/licenses/LICENSE-2.0
+
+$Id$
+]]--
+
+local ipairs, pairs = ipairs, pairs
+local tostring, tonumber = tostring, tonumber
+local pcall, assert, type = pcall, assert, type
+
+local os = require "os"
+local nixio = require "nixio"
+local util = require "luci.util"
+local ltn12 = require "luci.ltn12"
+local proto = require "luci.http.protocol"
+local table = require "table"
+local date = require "luci.http.protocol.date"
+
+module "luci.lucid.http.server"
+
+VERSION = "1.0"
+
+statusmsg = {
+	[200] = "OK",
+	[206] = "Partial Content",
+	[301] = "Moved Permanently",
+	[302] = "Found",
+	[304] = "Not Modified",
+	[400] = "Bad Request",
+	[401] = "Unauthorized",
+	[403] = "Forbidden",
+	[404] = "Not Found",
+	[405] = "Method Not Allowed",
+	[408] = "Request Time-out",
+	[411] = "Length Required",
+	[412] = "Precondition Failed",
+	[416] = "Requested range not satisfiable",
+	[500] = "Internal Server Error",
+	[503] = "Server Unavailable",
+}
+
+-- File Resource
+IOResource = util.class()
+
+function IOResource.__init__(self, fd, len)
+	self.fd, self.len = fd, len
+end
+
+
+-- Server handler implementation
+Handler = util.class()
+
+function Handler.__init__(self, name)
+	self.name = name or tostring(self)
+end
+
+-- Creates a failure reply
+function Handler.failure(self, code, msg)	
+	return code, { ["Content-Type"] = "text/plain" }, ltn12.source.string(msg)
+end
+
+-- Access Restrictions
+function Handler.restrict(self, restriction)
+	if not self.restrictions then
+		self.restrictions = {restriction}
+	else
+		self.restrictions[#self.restrictions+1] = restriction
+	end
+end
+
+-- Check restrictions
+function Handler.checkrestricted(self, request)
+	if not self.restrictions then
+		return
+	end
+
+	local localif, user, pass
+	
+	for _, r in ipairs(self.restrictions) do
+		local stat = true
+		if stat and r.interface then	-- Interface restriction
+			if not localif then
+				for _, v in ipairs(request.server.interfaces) do
+					if v.addr == request.env.SERVER_ADDR then
+						localif = v.name
+						break
+					end
+				end
+			end
+			
+			if r.interface ~= localif then
+				stat = false
+			end
+		end
+		
+		if stat and r.user then	-- User restriction
+			local rh, pwe
+			if not user then
+				rh = (request.headers.Authorization or ""):match("Basic (.*)")
+				rh = rh and nixio.bin.b64decode(rh) or ""
+				user, pass = rh:match("(.*):(.*)")
+				pass = pass or ""
+			end
+			pwe = nixio.getsp and nixio.getsp(r.user) or nixio.getpw(r.user)
+			local pwh = (user == r.user) and pwe and (pwe.pwdp or pwe.passwd)
+			if not pwh or #pwh < 1 or nixio.crypt(pass, pwh) ~= pwh then
+				stat = false
+			end
+		end
+		
+		if stat then
+			return
+		end
+	end
+	
+	return 401, {
+		["WWW-Authenticate"] = ('Basic realm=%q'):format(self.name),
+		["Content-Type"] = 'text/plain'
+	}, ltn12.source.string("Unauthorized")
+end
+
+-- Processes a request
+function Handler.process(self, request, sourcein)
+	local stat, code, hdr, sourceout
+	
+	local stat, code, msg = self:checkrestricted(request)
+	if stat then	-- Access Denied
+		return stat, code, msg
+	end
+
+	-- Detect request Method
+	local hname = "handle_" .. request.env.REQUEST_METHOD
+	if self[hname] then
+		-- Run the handler
+		stat, code, hdr, sourceout = pcall(self[hname], self, request, sourcein)
+
+		-- Check for any errors
+		if not stat then
+			return self:failure(500, code)
+		end
+	else
+		return self:failure(405, statusmsg[405])
+	end
+
+	return code, hdr, sourceout
+end
+
+
+VHost = util.class()
+
+function VHost.__init__(self)
+	self.handlers = {}
+end
+
+function VHost.process(self, request, ...)
+	local handler
+	local hlen = -1
+	local uri = request.env.SCRIPT_NAME
+	local sc = ("/"):byte()
+
+	-- SCRIPT_NAME
+	request.env.SCRIPT_NAME = ""
+
+	-- Call URI part
+	request.env.PATH_INFO = uri
+	
+	for k, h in pairs(self.handlers) do
+		if #k > hlen then
+			if uri == k or (uri:sub(1, #k) == k and uri:byte(#k+1) == sc) then
+				handler = h
+				hlen = #k
+				request.env.SCRIPT_NAME = k
+				request.env.PATH_INFO   = uri:sub(#k+1)
+			end
+		end
+	end
+	
+	if handler then
+		return handler:process(request, ...)
+	else
+		return 404, nil, ltn12.source.string("No such handler")
+	end
+end
+
+function VHost.get_handlers(self)
+	return self.handlers
+end
+
+function VHost.set_handler(self, match, handler)
+	self.handlers[match] = handler
+end
+
+
+local function remapipv6(adr)
+	local map = "::ffff:"
+	if adr:sub(1, #map) == map then
+		return adr:sub(#map+1)
+	else
+		return adr
+	end 
+end
+
+local function chunksource(sock, buffer)
+	buffer = buffer or ""
+	return function()
+		local output
+		local _, endp, count = buffer:find("^([0-9a-fA-F]+);?.-\r\n")
+		while not count and #buffer <= 1024 do
+			local newblock, code = sock:recv(1024 - #buffer)
+			if not newblock then
+				return nil, code
+			end
+			buffer = buffer .. newblock  
+			_, endp, count = buffer:find("^([0-9a-fA-F]+);?.-\r\n")
+		end
+		count = tonumber(count, 16)
+		if not count then
+			return nil, -1, "invalid encoding"
+		elseif count == 0 then
+			return nil
+		elseif count + 2 <= #buffer - endp then
+			output = buffer:sub(endp+1, endp+count)
+			buffer = buffer:sub(endp+count+3)
+			return output
+		else
+			output = buffer:sub(endp+1, endp+count)
+			buffer = ""
+			if count - #output > 0 then
+				local remain, code = sock:recvall(count-#output)
+				if not remain then
+					return nil, code
+				end
+				output = output .. remain
+				count, code = sock:recvall(2)
+			else
+				count, code = sock:recvall(count+2-#buffer+endp)
+			end
+			if not count then
+				return nil, code
+			end
+			return output
+		end
+	end
+end
+
+local function chunksink(sock)
+	return function(chunk, err)
+		if not chunk then
+			return sock:writeall("0\r\n\r\n")
+		else
+			return sock:writeall(("%X\r\n%s\r\n"):format(#chunk, chunk))
+		end
+	end
+end
+
+Server = util.class()
+
+function Server.__init__(self)
+	self.vhosts = {}
+end
+
+function Server.get_vhosts(self)
+	return self.vhosts
+end
+
+function Server.set_vhost(self, name, vhost)
+	self.vhosts[name] = vhost
+end
+
+function Server.error(self, client, code, msg)
+	hcode = tostring(code)
+	
+	client:writeall( "HTTP/1.0 " .. hcode .. " " ..
+	 statusmsg[code] .. "\r\n" )
+	client:writeall( "Connection: close\r\n" )
+	client:writeall( "Content-Type: text/plain\r\n\r\n" )
+
+	if msg then
+		client:writeall( "HTTP-Error " .. code .. ": " .. msg .. "\r\n" )
+	end
+	
+	client:close()
+end
+
+local hdr2env = {
+	["Content-Length"] = "CONTENT_LENGTH",
+	["Content-Type"] = "CONTENT_TYPE",
+	["Content-type"] = "CONTENT_TYPE",
+	["Accept"] = "HTTP_ACCEPT",
+	["Accept-Charset"] = "HTTP_ACCEPT_CHARSET",
+	["Accept-Encoding"] = "HTTP_ACCEPT_ENCODING",
+	["Accept-Language"] = "HTTP_ACCEPT_LANGUAGE",
+	["Connection"] = "HTTP_CONNECTION",
+	["Cookie"] = "HTTP_COOKIE",
+	["Host"] = "HTTP_HOST",
+	["Referer"] = "HTTP_REFERER",
+	["User-Agent"] = "HTTP_USER_AGENT"
+}
+
+function Server.parse_headers(self, source)
+	local env = {}
+	local req = {env = env, headers = {}}
+	local line, err
+
+	repeat	-- Ignore empty lines
+		line, err = source()
+		if not line then
+			return nil, err
+		end
+	until #line > 0
+	
+	env.REQUEST_METHOD, env.REQUEST_URI, env.SERVER_PROTOCOL =
+		line:match("^([A-Z]+) ([^ ]+) (HTTP/1%.[01])$")
+		
+	if not env.REQUEST_METHOD then
+		return nil, "invalid magic"
+	end
+	
+	local key, envkey, val
+	repeat
+		line, err = source()
+		if not line then
+			return nil, err
+		elseif #line > 0 then	
+			key, val = line:match("^([%w-]+)%s?:%s?(.*)")
+			if key then
+				req.headers[key] = val
+				envkey = hdr2env[key]
+				if envkey then
+					env[envkey] = val
+				end
+			else
+				return nil, "invalid header line"
+			end
+		else
+			break
+		end
+	until false
+	
+	env.SCRIPT_NAME, env.QUERY_STRING = env.REQUEST_URI:match("(.*)%??(.*)")
+	return req
+end
+
+
+function Server.process(self, client, env)
+	local sourcein  = function() end
+	local sourcehdr = client:linesource()
+	local sinkout
+	local buffer
+	
+	local close = false
+	local stat, code, msg, message, err
+	
+	client:setsockopt("socket", "rcvtimeo", 15)
+	client:setsockopt("socket", "sndtimeo", 15)
+	
+	repeat
+		-- parse headers
+		message, err = self:parse_headers(sourcehdr)
+
+		-- any other error
+		if not message or err then
+			if err == 11 then	-- EAGAIN
+				break
+			else
+				return self:error(client, 400, err)
+			end
+		end
+
+		-- Prepare sources and sinks
+		buffer = sourcehdr(true)
+		sinkout = client:sink()
+		message.server = env
+		
+		if client:is_tls_socket() then
+			message.env.HTTPS = "on"
+		end
+		
+		-- Addresses
+		message.env.REMOTE_ADDR = remapipv6(env.host)
+		message.env.REMOTE_PORT = env.port
+		
+		local srvaddr, srvport = client:getsockname()
+		message.env.SERVER_ADDR = remapipv6(srvaddr)
+		message.env.SERVER_PORT = srvport
+		
+		-- keep-alive
+		if message.env.SERVER_PROTOCOL == "HTTP/1.1" then
+			close = (message.env.HTTP_CONNECTION == "close")
+		else
+			close = not message.env.HTTP_CONNECTION 
+				or message.env.HTTP_CONNECTION == "close"
+		end
+
+		-- Uncomment this to disable keep-alive
+		close = close or env.config.nokeepalive
+	
+		if message.env.REQUEST_METHOD == "GET"
+		or message.env.REQUEST_METHOD == "HEAD" then
+			-- Be happy
+			
+		elseif message.env.REQUEST_METHOD == "POST" then
+			-- If we have a HTTP/1.1 client and an Expect: 100-continue header
+			-- respond with HTTP 100 Continue message
+			if message.env.SERVER_PROTOCOL == "HTTP/1.1" 
+			and message.headers.Expect == '100-continue' then
+				client:writeall("HTTP/1.1 100 Continue\r\n\r\n")
+			end
+			
+			if message.headers['Transfer-Encoding'] and
+			 message.headers['Transfer-Encoding'] ~= "identity" then
+				sourcein = chunksource(client, buffer)
+				buffer = nil
+			elseif message.env.CONTENT_LENGTH then
+				local len = tonumber(message.env.CONTENT_LENGTH)
+				if #buffer >= len then
+					sourcein = ltn12.source.string(buffer:sub(1, len))
+					buffer = buffer:sub(len+1)
+				else
+					sourcein = ltn12.source.cat(
+						ltn12.source.string(buffer),
+						client:blocksource(nil, len - #buffer)
+					)
+				end
+			else
+				return self:error(client, 411, statusmsg[411])
+			end
+		else
+			return self:error(client, 405, statusmsg[405])
+		end
+
+
+		local host = self.vhosts[message.env.HTTP_HOST] or self.vhosts[""]
+		if not host then
+			return self:error(client, 404, "No virtual host found")
+		end
+		
+		local code, headers, sourceout = host:process(message, sourcein)
+		headers = headers or {}
+		
+		-- Post process response
+		if sourceout then
+			if util.instanceof(sourceout, IOResource) then
+				if not headers["Content-Length"] then
+					headers["Content-Length"] = sourceout.len
+				end
+			end
+			if not headers["Content-Length"] then
+				if message.http_version == 1.1 then
+					headers["Transfer-Encoding"] = "chunked"
+					sinkout = chunksink(client)
+				else
+					close = true
+				end
+			end
+		elseif message.request_method ~= "head" then
+			headers["Content-Length"] = 0
+		end
+		
+		if close then
+			headers["Connection"] = "close"
+		elseif message.env.SERVER_PROTOCOL == "HTTP/1.0" then
+			headers["Connection"] = "Keep-Alive"
+		end 
+
+		headers["Date"] = date.to_http(os.time())
+		local header = {
+			message.env.SERVER_PROTOCOL .. " " .. tostring(code) .. " " 
+				.. statusmsg[code],
+			"Server: LuCId-HTTPd/" .. VERSION
+		}
+
+		
+		for k, v in pairs(headers) do
+			if type(v) == "table" then
+				for _, h in ipairs(v) do
+					header[#header+1] = k .. ": " .. h
+				end
+			else
+				header[#header+1] = k .. ": " .. v
+			end
+		end
+
+		header[#header+1] = ""
+		header[#header+1] = ""
+		
+		-- Output
+		stat, code, msg = client:writeall(table.concat(header, "\r\n"))
+
+		if sourceout and stat then
+			if util.instanceof(sourceout, IOResource) then
+				stat, code, msg = sourceout.fd:copyz(client, sourceout.len)
+			else
+				stat, msg = ltn12.pump.all(sourceout, sinkout)
+			end
+		end
+
+
+		-- Write errors
+		if not stat then
+			if msg then
+				nixio.syslog("err", "Error sending data to " .. env.host ..
+					": " .. msg .. "\n")
+			end
+			break
+		end
+		
+		if buffer then
+			sourcehdr(buffer)
+		end
+	until close
+	
+	client:shutdown()
+	client:close()
+end