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- -- httpserver-static.lua
- -- Part of nodemcu-httpserver, handles sending static files to client.
- -- Author: Marcos Kirsch
- local function getMimeType(ext)
- local gzip = false
- -- 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"}
- -- add comressed flag if file ends with gz
- if ext:find("%.gz$") then
- ext = ext:sub(1, -4)
- gzip = true
- end
- if mt[ext] then contentType = mt[ext] else contentType = "text/plain" end
- return {contentType = contentType, gzip = gzip }
- end
- local function sendHeader(connection, code, codeString, mimeType)
- connection:send("HTTP/1.0 " .. code .. " " .. codeString .. "\r\nServer: nodemcu-httpserver\r\nContent-Type: " .. mimeType["contentType"] .. "\r\n")
- if mimeType["gzip"] then
- connection:send("Content-Encoding: gzip\r\n")
- end
- connection:send("Connection: close\r\n\r\n")
- end
- return function (connection, args)
- sendHeader(connection, 200, "OK", getMimeType(args.ext))
- --print("Begin sending:", args.file)
- -- Send file in little chunks
- local continue = true
- local bytesSent = 0
- while continue do
- -- NodeMCU file API lets you open 1 file at a time.
- -- So we need to open, seek, close each time in order
- -- to support multiple simultaneous clients.
- file.open(args.file)
- file.seek("set", bytesSent)
- local chunk = file.read(512)
- file.close()
- if chunk == nil then
- continue = false
- else
- coroutine.yield()
- connection:send(chunk)
- bytesSent = bytesSent + #chunk
- --print("Sent" .. args.file, bytesSent)
- end
- end
- --print("Finished sending:", args.file)
- end
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