-- httpserver-header.lua -- Part of nodemcu-httpserver, knows how to send an HTTP header. -- Author: Marcos Kirsch return function(connection, code, extension, isGzipped, extraHeaders) local function getHTTPStatusString(code) local codez = { [200] = "OK", [400] = "Bad Request", [401] = "Unauthorized", [404] = "Not Found", [405] = "Method Not Allowed", [500] = "Internal Server Error", [501] = "Not Implemented", } local myResult = codez[code] -- enforce returning valid http codes all the way throughout? if myResult then return myResult else return "Not Implemented" end end local function getMimeType(ext) -- A few MIME types. Keep list short. If you need something that is missing, let's add it. local mt = {css = "text/css", gif = "image/gif", html = "text/html", ico = "image/x-icon", jpeg = "image/jpeg", jpg = "image/jpeg", js = "application/javascript", json = "application/json", png = "image/png", xml = "text/xml"} if mt[ext] then return mt[ext] else return "application/octet-stream" end end local mimeType = getMimeType(extension) local statusString = getHTTPStatusString(code) connection:send("HTTP/1.0 " .. code .. " " .. statusString .. "\r\nServer: nodemcu-httpserver\r\nContent-Type: " .. mimeType .. "\r\n") if isGzipped then connection:send("Cache-Control: private, max-age=2592000\r\nContent-Encoding: gzip\r\n") end if (extraHeaders) then for i, extraHeader in ipairs(extraHeaders) do connection:send(extraHeader .. "\r\n") end end connection:send("Connection: close\r\n\r\n") return statusString end