Minimalistic server can be started and returns hardcoded message, prior to cleanup

httpserver.lua

@@ -1,42 +1,15 @@
 -- 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"
 
+module("httpserver", package.seeall)
 
-httpserver = {}
+require("TablePrinter")
 
-
--- 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
+-- Functions below aren't part of the public API
+-- Clients don't need to worry about them.
 
 -- given an HTTP request, returns the method (i.e. GET)
-function httpserver.private.getRequestMethod(request)
+local function 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
@@ -51,29 +24,82 @@ function httpserver.private.getRequestMethod(request)
    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
+---- given an HTTP request, returns a table with all the information.
+--local function parseRequest(request)
+--   parsedRequest = {}
+--
+--   -- First get the method
+--   parsedRequest["method"] = 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
 
-   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
+function parseRequest(request)
+   local result = {}
+   local matchEnd = 0
+
+   local matchBegin = matchEnd + 1
+   matchEnd = string.find (request, " ", matchBegin)
+   result.method = string.sub(request, matchBegin, matchEnd-1)
+
+   matchBegin = matchEnd + 1
+   matchEnd = string.find(request, " ", matchBegin)
+   result.url = string.sub(request, matchBegin, matchEnd-1)
+
+   matchBegin = matchEnd + 1
+   matchEnd = string.find(request, "\r\n", matchBegin)
+   result.version = string.sub(request, matchBegin, matchEnd-1)
+
+   return result
 end
+
+local function onReceive(connection, payload)
+   print(payload) -- for debugging
+
+   -- parse payload and decide what to serve.
+   parsedRequest = parseRequest(payload)
+   --TablePrinter.print(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
+
+local function handleRequest(connection)
+   connection:on("receive", onReceive)
+   connection:on("sent", function(connection) connection:close() end)
+end
+
+-- Starts web server in the specified port.
+function httpserver.start(port, clientTimeoutInSeconds)
+   server = net.createServer(net.TCP, clientTimeoutInSeconds)
+   server:listen(port, handleRequest)
+   return server
+end
+
+-- Stops the server.
+function httpserver.stop(server)
+   server:close()
+end
+
+return mymodule
+
+