nodemcu-httpserver/httpserver.lua at master · IntelliDust/nodemcu-httpserver · GitHub

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-- httpserver
-- Author: Marcos Kirsch

-- Starts web server in the specified port.
returnfunction (port)

locals=net.createServer(net.TCP, 10) -- 10 seconds client timeout
s:listen(
port,
function (connection)

-- This variable holds the thread used for sending data back to the user.
-- We do it in a separate thread because we need to yield when sending lots
-- of data in order to avoid overflowing the mcu's buffer.
localconnectionThread

localallowStatic= {GET=true, HEAD=true, POST=false, PUT=false, DELETE=false, TRACE=false, OPTIONS=false, CONNECT=false, PATCH=false}

localfunctionstartServing(fileServeFunction, connection, req, args)
localbufferedConnection= {}
connectionThread=coroutine.create(function(fileServeFunction, bconnection, req, args)
fileServeFunction(bconnection, req, args)
ifnotbconnection:flush() then
connection:close()
connectionThread=nil
end
end)
functionbufferedConnection:flush()
ifself.size>0then
connection:send(table.concat(self.data, ""))
self.data= {}
self.size=0
returntrue
end
returnfalse
end
functionbufferedConnection:send(payload)
locall=payload:len()
ifl+self.size>1000then
ifself:flush() then
coroutine.yield()
end
end
ifl>800then
connection:send(payload)
coroutine.yield()
else
table.insert(self.data, payload)
self.size=self.size+l
end
end
bufferedConnection.size=0
bufferedConnection.data= {}
localstatus, err=coroutine.resume(connectionThread, fileServeFunction, bufferedConnection, req, args)
ifnotstatusthen
print(err)
end
end

localfunctiononRequest(connection, req)
collectgarbage()
localmethod=req.method
localuri=req.uri
localfileServeFunction=nil

print("Method: " ..method);

if#(uri.file) >32then
-- nodemcu-firmware cannot handle long filenames.
uri.args= {code=400, errorString="Bad Request"}
fileServeFunction=dofile("httpserver-error.lc")
else
localfileExists=file.open(uri.file, "r")
file.close()

ifnotfileExiststhen
-- gzip check
fileExists=file.open(uri.file..".gz", "r")
file.close()

iffileExiststhen
print("gzip variant exists, serving that one")
uri.file=uri.file..".gz"
uri.isGzipped=true
end
end

ifnotfileExiststhen
uri.args= {code=404, errorString="Not Found"}
fileServeFunction=dofile("httpserver-error.lc")
elseifuri.isScriptthen
fileServeFunction=dofile(uri.file)
else
ifallowStatic[method] then
uri.args= {file=uri.file, ext=uri.ext, gzipped=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

localfunctiononReceive(connection, payload)
collectgarbage()
localconf=dofile("httpserver-conf.lc")
localauth
localuser="Anonymous"

-- parse payload and decide what to serve.
localreq=dofile("httpserver-request.lc")(payload)
print("Requested URI: " ..req.request)
ifconf.auth.enabledthen
auth=dofile("httpserver-basicauth.lc")
user=auth.authenticate(payload) -- authenticate returns nil on failed auth
end

ifuserandreq.methodIsValidand (req.method=="GET" orreq.method=="POST" orreq.method=="PUT") then
onRequest(connection, req)
else
localargs= {}
localfileServeFunction=dofile("httpserver-error.lc")
ifnotuserthen
args= {code=401, errorString="Not Authorized", headers= {auth.authErrorHeader()}}
elseifreq.methodIsValidthen
args= {code=501, errorString="Not Implemented"}
else
args= {code=400, errorString="Bad Request"}
end
startServing(fileServeFunction, connection, req, args)
end
end

localfunctiononSent(connection, payload)
collectgarbage()
ifconnectionThreadthen
localconnectionThreadStatus=coroutine.status(connectionThread)
ifconnectionThreadStatus=="suspended" then
-- Not finished sending file, resume.
localstatus, err=coroutine.resume(connectionThread)
ifnotstatusthen
print(err)
end
elseifconnectionThreadStatus=="dead" then
-- We're done sending file.
connection:close()
connectionThread=nil
end
end
end

connection:on("receive", onReceive)
connection:on("sent", onSent)

end
 )
-- false and nil evaluate as false
localip=wifi.sta.getip()
ifnotipthenip=wifi.ap.getip() end
print("nodemcu-httpserver running at http://" ..ip..":" ..port)
returns

end