%s
%s""" def __init__(self, networks, port = 80): # Check if wifi details have been set if len(networks) == 0: self.led.value(1) raise RuntimeError('Please set wifi ssid and password in config.py') self.led = Pin("LED", Pin.OUT) # Start connection self.wlan = network.WLAN(network.STA_IF) self.wlan.active(True) visible = self.wlan.scan() ssid = None password = None for name, a, b, c, d, e in visible: for t_ssid, t_password in networks: if name.decode("utf-8") == t_ssid: ssid = t_ssid password = t_password break if (ssid == None) or (password == None): self.led.value(1) raise RuntimeError("No known network found") self.wlan.connect(ssid, password) # Wait for connect success or failure max_wait = 20 error_count = 20 while max_wait > 0: if self.wlan.status() >= 3: break elif self.wlan.status() < 0: self.wlan.connect(ssid, password) error_count -= 1 if error_count <= 0: break else: max_wait -= 1 print('waiting for connection...') self.led.value(not self.led.value()) time.sleep(0.5) # Handle connection error if self.wlan.status() != 3: self.led.value(1) raise RuntimeError('wifi connection failed %d' % self.wlan.status()) print('connected') status = self.wlan.ifconfig() print('ip = ' + status[0]) # Open socket to the server self.sock = socket.socket() self.sock.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1) addr = socket.getaddrinfo('0.0.0.0', port)[0][-1] self.sock.bind(addr) self.sock.listen(1) print('listening on', addr) self.handlers = [] self.led.value(0) def add_handler(self, path, callback): for hp, hc in self.handlers: if hp == path: raise RuntimeError('path is already registered %s' % path) self.led.value(1) h = (path, callback) self.handlers.append(h) def listen_once(self): # Listen for connections try: cl, addr = self.sock.accept() print('client connected from', addr) request = cl.recv(1024).decode('utf-8') #print(request) response = "" found = False for path, callback in self.handlers: pos = request.find(path) if ((pos == 4) or (pos == 5)) and ((request[pos + len(path)] == ' ') or (request[pos + len(path)] == '?')): found = True response = callback(request) break code = 200 title = "OK" if not found: code = 404 title = "Not Found" response = self.html % (str(code), title, request) elif len(response) == 0: code = 503 title = "Internal Server Error" response = self.html % (str(code), title, request) cl.send('HTTP/1.0 ' + str(code) + ' ' + title + '\r\nContent-type: text/html\r\n\r\n') cl.send(response) except OSError as e: print(e) finally: cl.close() print('connection closed') def listen(self): while True: self.listen_once()