-- httpserver
-- Author: Marcos Kirsch
-- This is a very simple HTTP server designed to work on nodemcu (http://nodemcu.com)
-- It can handle GET and POST.
require "printTable"
httpserver = {}
-- Starts web server in the specified port.
--function httpserver.start(port, clientTimeoutInSeconds, debug)
-- -- Server constants
-- server = net.createServer(net.TCP, clientTimeoutInSeconds) server:listen(port, private.handleRequest)
--end
httpserver.private = {} -- not part of the public API
function httpserver.private.onReceive(connection, payload)
print(payload) -- for debugging
-- parse payload and decide what to serve.
parsedRequest = private.parseRequest(payload)
httpserver.private.printTable(parsedRequest, 3)
--generates HTML web site
httpHeader200 = "HTTP/1.1 200 OK\r\nConnection: keep-alive\r\nCache-Control: private, no-store\r\n\r\n"
html = "
Hola mundo
"
connection:send(httpHeader200 .. html)
end
function httpserver.private.handleRequest(connection)
connection:on("receive", onReceive)
connection:on("sent",function(connection) connection:close() end)
end
-- given an HTTP request, returns the method (i.e. GET)
function httpserver.private.getRequestMethod(request)
-- HTTP Request Methods.
-- HTTP servers are required to implement at least the GET and HEAD methods
-- http://en.wikipedia.org/wiki/Hypertext_Transfer_Protocol#Request_methods
httpMethods = {"GET", "HEAD", "POST", "PUT", "DELETE", "TRACE", "OPTIONS", "CONNECT", "PATCH"}
method = nil
for i=1,#httpMethods do
found = string.find(request, httpMethods[i])
if found == 1 then
break
end
end
return (httpMethods[found])
end
-- given an HTTP request, returns a table with all the information.
function httpserver.private.parseRequest(request)
parsedRequest = {}
-- First get the method
parsedRequest["method"] = httpserver.private.getRequestMethod(request)
if parsedRequest["method"] == nil then
return nil
end
-- Now get each value out of the header, skip the first line
lineNumber = 0
for line in request:gmatch("[^\r\n]+") do
if lineNumber ~=0 then
-- tag / value are of the style "Host: 10.0.7.15". Break them up.
found, valueIndex = string.find(line, ": ")
if found == nil then
break
end
tag = string.sub(line, 1, found - 1)
value = string.sub(line, found + 2, #line)
parsedRequest[tag] = value
end
lineNumber = lineNumber + 1
end
return parsedRequest
end