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- -- 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 = "<h1>Hola mundo</h1>"
- 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
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