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- -- httpserver
- -- Author: Marcos Kirsch
- -- Starts web server in the specified port.
- return function (port)
- local s = net.createServer(net.TCP, 10) -- 10 seconds client timeout
- s:listen(
- port,
- function (connection)
- -- This variable holds the thread (actually a Lua coroutine) used for sending data back to the user.
- -- We do it in a separate thread because we need to send in little chunks and wait for the onSent event
- -- before we can send more, or we risk overflowing the mcu's buffer.
- local connectionThread
- local allowStatic = {GET=true, HEAD=true, POST=false, PUT=false, DELETE=false, TRACE=false, OPTIONS=false, CONNECT=false, PATCH=false}
- local function startServing(fileServeFunction, connection, req, args)
- connectionThread = coroutine.create(function(fileServeFunction, bufferedConnection, req, args)
- fileServeFunction(bufferedConnection, req, args)
- -- The bufferedConnection may still hold some data that hasn't been sent. Flush it before closing.
- if not bufferedConnection:flush() then
- connection:close()
- connectionThread = nil
- end
- end)
- local BufferedConnectionClass = dofile("httpserver-connection.lc")
- local bufferedConnection = BufferedConnectionClass:new(connection)
- local status, err = coroutine.resume(connectionThread, fileServeFunction, bufferedConnection, req, args)
- if not status then
- print("Error: ", err)
- end
- end
- local function handleRequest(connection, req)
- collectgarbage()
- local method = req.method
- local uri = req.uri
- local fileServeFunction = nil
- if #(uri.file) > 32 then
- -- nodemcu-firmware cannot handle long filenames.
- uri.args = {code = 400, errorString = "Bad Request"}
- fileServeFunction = dofile("httpserver-error.lc")
- else
- local fileExists = file.open(uri.file, "r")
- file.close()
- if not fileExists then
- -- gzip check
- fileExists = file.open(uri.file .. ".gz", "r")
- file.close()
- if fileExists then
- --print("gzip variant exists, serving that one")
- uri.file = uri.file .. ".gz"
- uri.isGzipped = true
- end
- end
- if not fileExists then
- uri.args = {code = 404, errorString = "Not Found"}
- fileServeFunction = dofile("httpserver-error.lc")
- elseif uri.isScript then
- fileServeFunction = dofile(uri.file)
- else
- if allowStatic[method] then
- uri.args = {file = uri.file, ext = uri.ext, isGzipped = uri.isGzipped}
- fileServeFunction = dofile("httpserver-static.lc")
- else
- uri.args = {code = 405, errorString = "Method not supported"}
- fileServeFunction = dofile("httpserver-error.lc")
- end
- end
- end
- startServing(fileServeFunction, connection, req, uri.args)
- end
- local function onReceive(connection, payload)
- collectgarbage()
- local conf = dofile("httpserver-conf.lc")
- local auth
- local user = "Anonymous"
- -- as suggest by anyn99 (https://github.com/marcoskirsch/nodemcu-httpserver/issues/36#issuecomment-167442461)
- -- Some browsers send the POST data in multiple chunks.
- -- Collect data packets until the size of HTTP body meets the Content-Length stated in header
- if payload:find("Content%-Length:") or bBodyMissing then
- if fullPayload then fullPayload = fullPayload .. payload else fullPayload = payload end
- if (tonumber(string.match(fullPayload, "%d+", fullPayload:find("Content%-Length:")+16)) > #fullPayload:sub(fullPayload:find("\r\n\r\n", 1, true)+4, #fullPayload)) then
- bBodyMissing = true
- return
- else
- --print("HTTP packet assembled! size: "..#fullPayload)
- payload = fullPayload
- fullPayload, bBodyMissing = nil
- end
- end
- collectgarbage()
- -- parse payload and decide what to serve.
- local req = dofile("httpserver-request.lc")(payload)
- print(req.method .. ": " .. req.request)
- if conf.auth.enabled then
- auth = dofile("httpserver-basicauth.lc")
- user = auth.authenticate(payload) -- authenticate returns nil on failed auth
- end
- if user and req.methodIsValid and (req.method == "GET" or req.method == "POST" or req.method == "PUT") then
- handleRequest(connection, req)
- else
- local args = {}
- local fileServeFunction = dofile("httpserver-error.lc")
- if not user then
- args = {code = 401, errorString = "Not Authorized", headers = {auth.authErrorHeader()}}
- elseif req.methodIsValid then
- args = {code = 501, errorString = "Not Implemented"}
- else
- args = {code = 400, errorString = "Bad Request"}
- end
- startServing(fileServeFunction, connection, req, args)
- end
- end
- local function onSent(connection, payload)
- collectgarbage()
- if connectionThread then
- local connectionThreadStatus = coroutine.status(connectionThread)
- if connectionThreadStatus == "suspended" then
- -- Not finished sending file, resume.
- local status, err = coroutine.resume(connectionThread)
- if not status then
- print(err)
- end
- elseif connectionThreadStatus == "dead" then
- -- We're done sending file.
- connection:close()
- connectionThread = nil
- end
- end
- end
- local function onDisconnect(connection, payload)
- if connectionThread then
- connectionThread = nil
- collectgarbage()
- end
- end
- connection:on("receive", onReceive)
- connection:on("sent", onSent)
- connection:on("disconnection", onDisconnect)
- end
- )
- -- false and nil evaluate as false
- local ip = wifi.sta.getip()
- if not ip then ip = wifi.ap.getip() end
- if not ip then ip = "unknown IP" end
- print("nodemcu-httpserver running at http://" .. ip .. ":" .. port)
- return s
- end
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