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+-- httpserver
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+-- Author: Marcos Kirsch
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+-- This is a very simple HTTP server designed to work on nodemcu (http://nodemcu.com)
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+-- It can handle GET and POST.
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+require "printTable"
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+
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+
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+httpserver = {}
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+
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+
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+-- Starts web server in the specified port.
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+--function httpserver.start(port, clientTimeoutInSeconds, debug)
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+-- -- Server constants
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+-- server = net.createServer(net.TCP, clientTimeoutInSeconds) server:listen(port, private.handleRequest)
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+--end
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+
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+
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+httpserver.private = {} -- not part of the public API
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+
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+function httpserver.private.onReceive(connection, payload)
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+ print(payload) -- for debugging
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+
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+ -- parse payload and decide what to serve.
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+ parsedRequest = private.parseRequest(payload)
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+ httpserver.private.printTable(parsedRequest, 3)
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+
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+ --generates HTML web site
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+ httpHeader200 = "HTTP/1.1 200 OK\r\nConnection: keep-alive\r\nCache-Control: private, no-store\r\n\r\n"
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+ html = "<h1>Hola mundo</h1>"
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+ connection:send(httpHeader200 .. html)
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+end
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+
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+function httpserver.private.handleRequest(connection)
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+ connection:on("receive", onReceive)
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+ connection:on("sent",function(connection) connection:close() end)
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+end
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+
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+-- given an HTTP request, returns the method (i.e. GET)
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+function httpserver.private.getRequestMethod(request)
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+ -- HTTP Request Methods.
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+ -- HTTP servers are required to implement at least the GET and HEAD methods
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+ -- http://en.wikipedia.org/wiki/Hypertext_Transfer_Protocol#Request_methods
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+ httpMethods = {"GET", "HEAD", "POST", "PUT", "DELETE", "TRACE", "OPTIONS", "CONNECT", "PATCH"}
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+ method = nil
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+ for i=1,#httpMethods do
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+ found = string.find(request, httpMethods[i])
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+ if found == 1 then
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+ break
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+ end
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+ end
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+ return (httpMethods[found])
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+end
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+
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+-- given an HTTP request, returns a table with all the information.
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+function httpserver.private.parseRequest(request)
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+ parsedRequest = {}
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+ -- First get the method
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+
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+ parsedRequest["method"] = httpserver.private.getRequestMethod(request)
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+ if parsedRequest["method"] == nil then
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+ return nil
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+ end
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+ -- Now get each value out of the header, skip the first line
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+ lineNumber = 0
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+ for line in request:gmatch("[^\r\n]+") do
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+ if lineNumber ~=0 then
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+ -- tag / value are of the style "Host: 10.0.7.15". Break them up.
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+ found, valueIndex = string.find(line, ": ")
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+ if found == nil then
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+ break
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+ end
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+ tag = string.sub(line, 1, found - 1)
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+ value = string.sub(line, found + 2, #line)
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+ parsedRequest[tag] = value
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+ end
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+ lineNumber = lineNumber + 1
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+ end
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+ return parsedRequest
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+end
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