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captive.py
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captive.py
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import socket
import network
import time
import machine
ap = network.WLAN(network.AP_IF)
ap.active(True)
ap.config(essid="Change my LED", password="bananabanana", authmode=4) #authmode=1 == no pass
# PINs (5, 4, 0)
r = machine.Pin(5, machine.Pin.OUT, machine.Pin.PULL_UP)
g = machine.Pin(4, machine.Pin.OUT, machine.Pin.PULL_UP)
b = machine.Pin(0, machine.Pin.OUT, machine.Pin.PULL_UP)
r.high()
g.high()
b.high()
CONTENT = b"""\
HTTP/1.0 200 OK
<!doctype html>
<html>
<head>
<title>MicroPython Captive LED Portal</title>
<meta name="viewport" content="width=device-width, initial-scale=1">
<meta charset="utf8">
</head>
<body>
<h1>Change my LED Color!!!</h1>
<p>You are my #{:d} user!</p>
<form action="/led">
<input type="checkbox" name="r" {}>Red<br>
<input type="checkbox" name="g" {}>Green<br>
<input type="checkbox" name="b" {}>Blue<br>
<input type="submit" value="change">
</form>
<script>
</script>
</body>
</html>
"""
class DNSQuery:
def __init__(self, data):
self.data=data
self.dominio=''
print("Reading datagram data...")
m = data[2] # ord(data[2])
tipo = (m >> 3) & 15 # Opcode bits
if tipo == 0: # Standard query
ini=12
lon=data[ini] # ord(data[ini])
while lon != 0:
self.dominio+=data[ini+1:ini+lon+1].decode("utf-8") +'.'
ini+=lon+1
lon=data[ini] #ord(data[ini])
def respuesta(self, ip):
packet=b''
print("Resposta {} == {}".format(self.dominio, ip))
if self.dominio:
packet+=self.data[:2] + b"\x81\x80"
packet+=self.data[4:6] + self.data[4:6] + b'\x00\x00\x00\x00' # Questions and Answers Counts
packet+=self.data[12:] # Original Domain Name Question
packet+= b'\xc0\x0c' # Pointer to domain name
packet+= b'\x00\x01\x00\x01\x00\x00\x00\x3c\x00\x04' # Response type, ttl and resource data length -> 4 bytes
packet+=bytes(map(int,ip.split('.'))) # 4 bytes of IP
return packet
def start():
# DNS Server
ip=ap.ifconfig()[0]
print('DNS Server: dom.query. 60 IN A {:s}'.format(ip))
udps = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
udps.setblocking(False)
udps.bind(('',53))
# Web Server
s = socket.socket()
ai = socket.getaddrinfo(ip, 80)
print("Web Server: Bind address info:", ai)
addr = ai[0][-1]
s.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
s.bind(addr)
s.listen(1)
s.settimeout(2)
print("Web Server: Listening http://{}:80/".format(ip))
counter = 0
try:
while 1:
# DNS Loop
print("Before DNS...")
try:
data, addr = udps.recvfrom(1024)
print("incomming datagram...")
p=DNSQuery(data)
udps.sendto(p.respuesta(ip), addr)
print('Replying: {:s} -> {:s}'.format(p.dominio, ip))
except:
print("No dgram")
# Web loop
print("before accept...")
try:
res = s.accept()
client_sock = res[0]
client_addr = res[1]
#print("Client address:", client_addr)
#print("Client socket:", client_sock)
client_stream = client_sock
print("Request:")
req = client_stream.readline()
print(req)
while True:
h = client_stream.readline()
if h == b"" or h == b"\r\n" or h == None:
break
print(h)
# Change LED based on request variables
request_url = req[4:-11]
api = request_url[:5]
if api == b'/led?':
params = request_url[5:]
try:
d = {key: value for (key, value) in [x.split(b'=') for x in params.split(b'&')]}
except:
d = {}
if b'b' in d.keys():
b.high()
else:
b.low()
if b'r' in d.keys():
r.high()
else:
r.low()
if b'g' in d.keys():
g.high()
else:
g.low()
# Respond
# LED Management
if r.value() == 1:
rv = "checked"
else:
rv = ""
if g.value() == 1:
gv = "checked"
else:
gv = ""
if b.value() == 1:
bv = "checked"
else:
bv = ""
client_stream.write(CONTENT.format(counter,rv,gv,bv))
client_stream.close()
counter += 1
except:
print("timeout for web... moving on...")
print("loop")
time.sleep_ms(300)
except KeyboardInterrupt:
print('Closing')
udps.close()