connect_ap.lua example

This was supposed to be PRd by moononournation, but since he never did, I went ahead and added it to a branch.
2017-07-02 21:49:10 -05:00
1 changed files with 45 additions and 0 deletions
--- a/http/connect_ap.lua
+++ b/http/connect_ap.lua
@ -0,0 +1,45 @@
+-- Author: moononournation
+-- Notes by Marcos: This example could be improved quite a bit.
+-- We should provide a way to return available access points as JSON, then populated
+-- a drop down list using JavaScript every 5-10 seconds. I'm not sure it's worth it,
+-- however.
+
+return function (connection, req, args)
+    dofile('httpserver-header.lc')(connection, 200, 'html')
+
+   connection:send('<!DOCTYPE html><html lang="en"><head><meta charset="utf-8"><title>Connect AP</title></head><body><h1>Connect AP</h1>')
+
+   if req.method == 'GET' then
+      local ip = wifi.sta.getip()
+      if not (ip == nil) then
+         connection:send('<p>IP: ' .. ip .. '</p>')
+      end
+      connection:send('<form method="POST">SSID:<br><input type="text" name="ssid"><br>PWD:<br><input type="text" name="pwd"><br><input type="submit" name="submit" value="Submit"></form>')
+   elseif req.method == 'POST' then
+      local rd = req.getRequestData()
+
+      collectgarbage()
+      wifi.sta.config(rd['ssid'], rd['pwd'])
+      wifi.sta.connect()
+      local joinCounter = 0
+      local joinMaxAttempts = 15
+      tmr.alarm(0, 1000, 1, function()
+         local ip = wifi.sta.getip()
+         if ip == nil and joinCounter < joinMaxAttempts then
+            joinCounter = joinCounter + 1
+         else
+            if joinCounter >= joinMaxAttempts then
+               connection:send('<p>Failed to connect to WiFi Access Point.</p>')
+            else
+               connection:send('<p>IP: ' .. ip .. '</p>')
+            end
+            tmr.stop(0)
+            joinCounter = nil
+            joinMaxAttempts = nil
+            collectgarbage()
+         end
+      end)
+   end
+
+   connection:send('</body></html>')
+end