-- httpserver-header.lua -- Part of nodemcu-httpserver, knows how to send an HTTP header. -- Author: Marcos Kirsch return function (connection, code, extension, isGzipped) local function getHTTPStatusString(code) local codez = {[200]="OK", [400]="Bad Request", [404]="Not Found",} 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 "text/plain" end end local mimeType = getMimeType(extension) local header = "HTTP/1.0 " .. code .. " " .. getHTTPStatusString(code) .. "\r\nServer: nodemcu-httpserver\r\nContent-Type: " .. mimeType .. "\r\nnCache-Control: private, no-store\r\n" if isGzipped then header = header .. "Cache-Control: max-age=2592000\r\n" header = header .. "Content-Encoding: gzip\r\n" end header = header .. "Connection: close\r\n\r\n" connection:send(header) header = nil end