diff --git a/TODO b/TODO
index 110a78c..4fe107b 100644
--- a/TODO
+++ b/TODO
@@ -19,6 +19,13 @@
 * Separar as classes em arquivos
 * Retorno de sendto em datagram sockets pode ser refused
 
+falar sobre encodet/wrapt/decodet no manual sobre mime
+
+
+RECEIVE MUDOU!!! COLOCAR NO MANUAL.
+HTTP.lua mudou bastante também.
+
+
 change mime.eol to output marker on detection of first candidate, instead
 of on the second. that way it works in one pass for strings that end with 
 one candidate.
diff --git a/etc/eol.lua b/etc/eol.lua
index 6b2a8a9..aa43596 100644
--- a/etc/eol.lua
+++ b/etc/eol.lua
@@ -1,9 +1,6 @@
-marker = {['-u'] = '\10', ['-d'] = '\13\10'}
-arg = arg or {'-u'}
-marker = marker[arg[1]] or marker['-u']
-local convert = socket.mime.normalize(marker)
-while 1 do
-    local chunk = io.read(1)
-    io.write(convert(chunk))
-    if not chunk then break end
-end
+local marker = '\n'
+if arg and arg[1] == '-d' then marker = '\r\n' end
+local filter = mime.normalize(marker)
+local source = ltn12.source.chain(ltn12.source.file(io.stdin), filter)
+local sink = ltn12.sink.file(io.stdout)
+ltn12.pump(source, sink)
diff --git a/etc/get.lua b/etc/get.lua
index 0306b54..eafebda 100644
--- a/etc/get.lua
+++ b/etc/get.lua
@@ -93,7 +93,7 @@ function getbyhttp(url, file)
     local save = ltn12.sink.file(file or io.stdout)
     -- only print feedback if output is not stdout
     if file then save = ltn12.sink.chain(stats(gethttpsize(url)), save) end
-    local respt = socket.http.request_cb({url = url, sink = save})
+    local respt = socket.http.request {url = url, sink = save }
 	if respt.code ~= 200 then print(respt.status or respt.error) end
 end
 
@@ -103,7 +103,7 @@ function getbyftp(url, file)
     -- only print feedback if output is not stdout
     -- and we don't know how big the file is
     if file then save = ltn12.sink.chain(stats(), save) end
-    local ret, err = socket.ftp.get_cb {url = url, sink = save, type = "i"}
+    local ret, err = socket.ftp.get {url = url, sink = save, type = "i"}
 	if err then print(err) end
 end
 
diff --git a/etc/qp.lua b/etc/qp.lua
index 1ca0ae2..08545db 100644
--- a/etc/qp.lua
+++ b/etc/qp.lua
@@ -2,17 +2,15 @@ local convert
 arg = arg or {}
 local mode = arg and arg[1] or "-et"
 if mode == "-et" then
-    local normalize = socket.mime.normalize()
-    local qp = socket.mime.encode("quoted-printable")
-    local wrap = socket.mime.wrap("quoted-printable")
-    convert = socket.mime.chain(normalize, qp, wrap)
+    local normalize = mime.normalize()
+    local qp = mime.encode("quoted-printable")
+    local wrap = mime.wrap("quoted-printable")
+    convert = ltn12.filter.chain(normalize, qp, wrap)
 elseif mode == "-eb" then
-    local qp = socket.mime.encode("quoted-printable", "binary")
-    local wrap = socket.mime.wrap("quoted-printable")
-    convert = socket.mime.chain(qp, wrap)
-else convert = socket.mime.decode("quoted-printable") end
-while 1 do
-    local chunk = io.read(4096)
-    io.write(convert(chunk))
-    if not chunk then break end
-end
+    local qp = mime.encode("quoted-printable", "binary")
+    local wrap = mime.wrap("quoted-printable")
+    convert = ltn12.filter.chain(qp, wrap)
+else convert = mime.decode("quoted-printable") end
+local source = ltn12.source.chain(ltn12.source.file(io.stdin), convert)
+local sink = ltn12.sink.file(io.stdout)
+ltn12.pump(source, sink)
diff --git a/samples/daytimeclnt.lua b/samples/daytimeclnt.lua
index 29abe17..63f4017 100644
--- a/samples/daytimeclnt.lua
+++ b/samples/daytimeclnt.lua
@@ -14,8 +14,9 @@ host = socket.dns.toip(host)
 udp = socket.udp()
 print("Using host '" ..host.. "' and port " ..port.. "...")
 udp:setpeername(host, port)
+udp:settimeout(3)
 sent, err = udp:send("anything")
-if err then print(err) exit() end
+if err then print(err) os.exit() end
 dgram, err = udp:receive()
-if not dgram then print(err) exit() end
+if not dgram then print(err) os.exit() end
 io.write(dgram)
diff --git a/src/http.lua b/src/http.lua
index a10cf50..ab166e3 100644
--- a/src/http.lua
+++ b/src/http.lua
@@ -2,7 +2,7 @@
 -- HTTP/1.1 client support for the Lua language.
 -- LuaSocket toolkit.
 -- Author: Diego Nehab
--- Conforming to: RFC 2616, LTN7
+-- Conforming to RFC 2616
 -- RCS ID: $Id$
 -----------------------------------------------------------------------------
 -- make sure LuaSocket is loaded
@@ -39,21 +39,18 @@ local function third(a, b, c)
     return c
 end
 
-local function shift(a, b, c, d)
-    return c, d
-end
-
--- resquest_p forward declaration
-local request_p
-
-local function receive_headers(sock, headers)
-    local line, name, value
+local function receive_headers(reqt, respt)
+    local headers = {}
+    local sock = respt.tmp.sock
+    local line, name, value, _
+    -- store results
+    respt.headers = headers
     -- get first line
     line = socket.try(sock:receive())
     -- headers go until a blank line is found
     while line ~= "" do
         -- get field-name and value
-        name, value = shift(string.find(line, "^(.-):%s*(.*)"))
+        _, _, name, value = string.find(line, "^(.-):%s*(.*)")
         assert(name and value, "malformed reponse headers")
         name = string.lower(name)
         -- get next line (value might be folded)
@@ -100,7 +97,10 @@ local function receive_body_bychunks(sock, sink)
     -- let callback know we are done
     hand(sink, nil)
     -- servers shouldn't send trailer headers, but who trusts them?
-    receive_headers(sock, {})
+    local line = socket.try(sock:receive())
+    while line ~= "" do
+        line = socket.try(sock:receive())
+    end
 end
 
 local function receive_body_bylength(sock, length, sink)
@@ -245,7 +245,7 @@ local function open(reqt, respt)
     socket.try(sock:connect(host, port))
 end
 
-function adjust_headers(reqt, respt)
+local function adjust_headers(reqt, respt)
     local lower = {}
     local headers = reqt.headers or {}
     -- set default headers
@@ -261,7 +261,7 @@ function adjust_headers(reqt, respt)
     respt.tmp.headers = lower
 end
 
-function parse_url(reqt, respt)
+local function parse_url(reqt, respt)
     -- parse url with default fields
     local parsed = socket.url.parse(reqt.url, {
         host = "",
@@ -280,11 +280,16 @@ function parse_url(reqt, respt)
     respt.tmp.parsed = parsed
 end
 
+-- forward declaration
+local request_p
+
 local function should_authorize(reqt, respt)
     -- if there has been an authorization attempt, it must have failed
     if reqt.headers and reqt.headers["authorization"] then return nil end
-    -- if we don't have authorization information, we can't retry
-    return respt.tmp.parsed.user and respt.tmp.parsed.password 
+    -- if last attempt didn't fail due to lack of authentication,
+    -- or we don't have authorization information, we can't retry
+    return respt.code == 401 and 
+        respt.tmp.parsed.user and respt.tmp.parsed.password 
 end
 
 local function clone(headers)
@@ -338,14 +343,14 @@ local function redirect(reqt, respt)
     if respt.headers then respt.headers.location = redirt.url end
 end
 
+-- execute a request of through an exception
 function request_p(reqt, respt)
     parse_url(reqt, respt)
     adjust_headers(reqt, respt)
     open(reqt, respt)
     send_request(reqt, respt)
     receive_status(reqt, respt)
-    respt.headers = {}
-    receive_headers(respt.tmp.sock, respt.headers)
+    receive_headers(reqt, respt)
     if should_redirect(reqt, respt) then
         respt.tmp.sock:close()
         redirect(reqt, respt)
diff --git a/src/ltn12.lua b/src/ltn12.lua
index dc49d80..ed3449b 100644
--- a/src/ltn12.lua
+++ b/src/ltn12.lua
@@ -22,6 +22,7 @@ end
 
 -- returns a high level filter that cycles a cycles a low-level filter
 function filter.cycle(low, ctx, extra)
+    if type(low) ~= 'function' then error('invalid low-level filter', 2) end 
     return function(chunk)
         local ret
         ret, ctx = low(ctx, chunk, extra)
@@ -31,6 +32,8 @@ end
 
 -- chains two filters together
 local function chain2(f1, f2)
+    if type(f1) ~= 'function' then error('invalid filter', 2) end 
+    if type(f2) ~= 'function' then error('invalid filter', 2) end 
     return function(chunk)
         return f2(f1(chunk))
     end
@@ -40,6 +43,7 @@ end
 function filter.chain(...)
     local f = arg[1]
     for i = 2, table.getn(arg) do
+        if type(arg[i]) ~= 'function' then error('invalid filter', 2) end 
         f = chain2(f, arg[i])
     end
     return f
@@ -74,6 +78,7 @@ end
 
 -- turns a fancy source into a simple source
 function source.simplify(src)
+    if type(src) ~= 'function' then error('invalid source', 2) end 
     return function()
         local chunk, err_or_new = src()
         src = err_or_new or src
@@ -97,6 +102,7 @@ end
 
 -- creates rewindable source
 function source.rewind(src)
+    if type(src) ~= 'function' then error('invalid source', 2) end 
     local t = {}
     return function(chunk)
         if not chunk then
@@ -111,6 +117,8 @@ end
 
 -- chains a source with a filter
 function source.chain(src, f)
+    if type(src) ~= 'function' then error('invalid source', 2) end
+    if type(f) ~= 'function' then error('invalid filter', 2) end
     local co = coroutine.create(function()
         while true do 
             local chunk, err = src()
@@ -157,6 +165,7 @@ end
 
 -- turns a fancy sink into a simple sink
 function sink.simplify(snk)
+    if type(snk) ~= 'function' then error('invalid sink', 2) end
     return function(chunk, err)
         local ret, err_or_new = snk(chunk, err)
         if not ret then return nil, err_or_new end
@@ -195,6 +204,8 @@ end
 
 -- chains a sink with a filter 
 function sink.chain(f, snk)
+    if type(snk) ~= 'function' then error('invalid sink', 2) end
+    if type(f) ~= 'function' then error('invalid filter', 2) end
     return function(chunk, err)
         local filtered = f(chunk)
         local done = chunk and ""
@@ -209,6 +220,8 @@ end
 
 -- pumps all data from a source to a sink
 function pump(src, snk)
+    if type(src) ~= 'function' then error('invalid source', 2) end
+    if type(snk) ~= 'function' then error('invalid sink', 2) end
     while true do
         local chunk, src_err = src()
         local ret, snk_err = snk(chunk, src_err)
diff --git a/src/smtp.lua b/src/smtp.lua
index c823c97..ed8bd15 100644
--- a/src/smtp.lua
+++ b/src/smtp.lua
@@ -20,16 +20,17 @@ DOMAIN = os.getenv("SERVER_NAME") or "localhost"
 -- default time zone (means we don't know)
 ZONE = "-0000"
 
-function stuff()
-    return ltn12.filter.cycle(dot, 2)
-end
-
 local function shift(a, b, c)
     return b, c
 end
 
+-- high level stuffing filter
+function stuff()
+    return ltn12.filter.cycle(dot, 2)
+end
+
 -- send message or throw an exception
-function psend(control, mailt) 
+local function send_p(control, mailt) 
     socket.try(control:check("2.."))
     socket.try(control:command("EHLO", mailt.domain or DOMAIN))
     socket.try(control:check("2.."))
@@ -61,11 +62,11 @@ local function newboundary()
         math.random(0, 99999), seqno)
 end
 
--- sendmessage forward declaration
-local sendmessage
+-- send_message forward declaration
+local send_message
 
 -- yield multipart message body from a multipart message table
-local function sendmultipart(mesgt)
+local function send_multipart(mesgt)
     local bd = newboundary()
     -- define boundary and finish headers
     coroutine.yield('content-type: multipart/mixed; boundary="' .. 
@@ -75,7 +76,7 @@ local function sendmultipart(mesgt)
     -- send each part separated by a boundary
     for i, m in ipairs(mesgt.body) do
         coroutine.yield("\r\n--" .. bd .. "\r\n")
-        sendmessage(m)
+        send_message(m)
     end
     -- send last boundary 
     coroutine.yield("\r\n--" .. bd .. "--\r\n\r\n")
@@ -84,7 +85,7 @@ local function sendmultipart(mesgt)
 end
 
 -- yield message body from a source
-local function sendsource(mesgt)
+local function send_source(mesgt)
     -- set content-type if user didn't override
     if not mesgt.headers or not mesgt.headers["content-type"] then
         coroutine.yield('content-type: text/plain; charset="iso-8859-1"\r\n')
@@ -101,7 +102,7 @@ local function sendsource(mesgt)
 end
 
 -- yield message body from a string
-local function sendstring(mesgt)
+local function send_string(mesgt)
     -- set content-type if user didn't override
     if not mesgt.headers or not mesgt.headers["content-type"] then
         coroutine.yield('content-type: text/plain; charset="iso-8859-1"\r\n')
@@ -114,7 +115,7 @@ local function sendstring(mesgt)
 end
 
 -- yield the headers one by one
-local function sendheaders(mesgt)
+local function send_headers(mesgt)
     if mesgt.headers then
         for i,v in pairs(mesgt.headers) do
             coroutine.yield(i .. ':' .. v .. "\r\n")
@@ -123,15 +124,15 @@ local function sendheaders(mesgt)
 end
 
 -- message source
-function sendmessage(mesgt)
-    sendheaders(mesgt)
-    if type(mesgt.body) == "table" then sendmultipart(mesgt)
-    elseif type(mesgt.body) == "function" then sendsource(mesgt)
-    else sendstring(mesgt) end
+function send_message(mesgt)
+    send_headers(mesgt)
+    if type(mesgt.body) == "table" then send_multipart(mesgt)
+    elseif type(mesgt.body) == "function" then send_source(mesgt)
+    else send_string(mesgt) end
 end
 
 -- set defaul headers
-local function adjustheaders(mesgt)
+local function adjust_headers(mesgt)
     mesgt.headers = mesgt.headers or {}
     mesgt.headers["mime-version"] = "1.0" 
     mesgt.headers["date"] = mesgt.headers["date"] or 
@@ -140,16 +141,16 @@ local function adjustheaders(mesgt)
 end
 
 function message(mesgt)
-    adjustheaders(mesgt)
+    adjust_headers(mesgt)
     -- create and return message source
-    local co = coroutine.create(function() sendmessage(mesgt) end)
+    local co = coroutine.create(function() send_message(mesgt) end)
     return function() return shift(coroutine.resume(co)) end
 end
 
 function send(mailt)
     local c, e = socket.tp.connect(mailt.server or SERVER, mailt.port or PORT)
     if not c then return nil, e end
-    local s, e = pcall(psend, c, mailt)
+    local s, e = pcall(send_p, c, mailt)
     c:close()
     if s then return true
     else return nil, e end
diff --git a/test/httptest.lua b/test/httptest.lua
index ddeea50..4ec0cc1 100644
--- a/test/httptest.lua
+++ b/test/httptest.lua
@@ -3,7 +3,7 @@
 -- needs ScriptAlias from /home/c/diego/tec/luasocket/test/cgi
 -- to "/luasocket-test-cgi" and "/luasocket-test-cgi/"
 -- needs "AllowOverride AuthConfig" on /home/c/diego/tec/luasocket/test/auth
-dofile("noglobals.lua")
+dofile("testsupport.lua")
 
 local host, proxy, request, response, index_file
 local ignore, expect, index, prefix, cgiprefix, index_crlf
@@ -18,33 +18,9 @@ prefix = prefix or "/luasocket-test"
 cgiprefix = cgiprefix or "/luasocket-test-cgi"
 index_file = "test/index.html"
 
-local readfile = function(name)
-	local f = io.open(name, "r")
-	if not f then return nil end
-	local s = f:read("*a")
-	f:close()
-	return s
-end
-
 -- read index with CRLF convention
 index = readfile(index_file)
 
-local similar = function(s1, s2)
-	return string.lower(string.gsub(s1 or "", "%s", "")) == 
-        string.lower(string.gsub(s2 or "", "%s", ""))
-end
-
-local fail = function(s)
-	s = s or "failed!"
-	print(s)
-	os.exit()
-end
-
-local check = function (v, e)
-	if v then print("ok")
-	else fail(e) end
-end
-
 local check_result = function(response, expect, ignore)
 	for i,v in response do
 		if not ignore[i] then
@@ -171,7 +147,7 @@ check_request(request, expect, ignore)
 ------------------------------------------------------------------------
 io.write("testing simple post function: ")
 back = socket.http.post("http://" .. host .. cgiprefix .. "/cat", index)
-check(back == index)
+assert(back == index)
 
 ------------------------------------------------------------------------
 io.write("testing ltn12.(sink|source).file: ")
@@ -191,7 +167,7 @@ ignore = {
 }
 check_request(request, expect, ignore)
 back = readfile(index_file .. "-back")
-check(back == index)
+assert(back == index)
 os.remove(index_file .. "-back")
 
 ------------------------------------------------------------------------
@@ -233,7 +209,7 @@ ignore = {
 }
 check_request(request, expect, ignore)
 back = readfile(index_file .. "-back")
-check(back == index)
+assert(back == index)
 os.remove(index_file .. "-back")
 
 ------------------------------------------------------------------------
@@ -434,7 +410,7 @@ check_request(request, expect, ignore)
 local body
 io.write("testing simple get function: ")
 body = socket.http.get("http://" .. host .. prefix .. "/index.html")
-check(body == index)
+assert(body == index)
 
 ------------------------------------------------------------------------
 io.write("testing HEAD method: ")
@@ -443,7 +419,7 @@ response = socket.http.request {
   method = "HEAD",
   url = "http://www.cs.princeton.edu/~diego/"
 }
-check(response and response.headers)
+assert(response and response.headers)
 
 ------------------------------------------------------------------------
 print("passed all tests")
diff --git a/test/smtptest.lua b/test/smtptest.lua
index 8468408..e812737 100644
--- a/test/smtptest.lua
+++ b/test/smtptest.lua
@@ -16,7 +16,7 @@ local err
 
 dofile("mbox.lua")
 local parse = mbox.parse
-dofile("noglobals.lua")
+dofile("testsupport.lua")
 
 local total = function()
 	local t = 0
diff --git a/test/testsupport.lua b/test/testsupport.lua
new file mode 100644
index 0000000..ca3cd95
--- /dev/null
+++ b/test/testsupport.lua
@@ -0,0 +1,37 @@
+function readfile(name)
+	local f = io.open(name, "r")
+	if not f then return nil end
+	local s = f:read("*a")
+	f:close()
+	return s
+end
+
+function similar(s1, s2)
+	return string.lower(string.gsub(s1 or "", "%s", "")) == 
+        string.lower(string.gsub(s2 or "", "%s", ""))
+end
+
+function fail(msg)
+    msg = msg or "failed"
+    error(msg, 2)
+end
+
+function compare(input, output)
+    local original = readfile(input)
+    local recovered = readfile(output)
+    if original ~= recovered then fail("comparison failed")
+    else print("ok") end
+end
+
+local G = _G
+local set = rawset
+local warn = print
+
+local setglobal = function(table, key, value)
+	warn("changed " .. key)
+    set(table, key, value)
+end
+
+setmetatable(G, {
+    __newindex = setglobal
+})
diff --git a/test/urltest.lua b/test/urltest.lua
index 990a3e5..7e0e73f 100644
--- a/test/urltest.lua
+++ b/test/urltest.lua
@@ -1,4 +1,4 @@
-dofile("noglobals.lua")
+dofile("testsupport.lua")
 
 local check_build_url = function(parsed)
 	local built = socket.url.build(parsed)