PicoWireless: move HTTP code to ppwhttp library
Creates a new ppwhttp library to hide the implementation detail of HTTP clients/servers from the examples. Adds a new example - plasma_ws2812_http.py - showing how to expand rgb_http.py to use a WS2812 pixel strip. Adds "secrets.py" and moves WIFI connection information there. ppwhttp will throw an error if it's missing.
This commit is contained in:
Phil Howard
parent
37209cd0c0
commit
9f07be90da
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secrets.py
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@ -1,106 +1,25 @@
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import time
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import picowireless
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from micropython import const
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WIFI_SSID = "Your SSID here!"
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WIFI_PASS = "Your PSK here!"
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try:
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import ppwhttp
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except ImportError:
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raise RuntimeError("Cannot find ppwhttp. Have you copied ppwhttp.py to your Pico?")
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CLOUDFLARE_DNS = (1, 1, 1, 1)
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GOOGLE_DNS = (8, 8, 8, 8)
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USE_DNS = CLOUDFLARE_DNS
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TCP_MODE = const(0)
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HTTP_REQUEST_DELAY = const(30)
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HTTP_PORT = 80
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HTTP_REQUEST_DELAY = const(60)
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HTTP_REQUEST_PORT = const(80)
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HTTP_REQUEST_HOST = "api.thingspeak.com"
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HTTP_REQUEST_PATH = "/channels/1417/field/2/last.txt"
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def connect(host_address, port, client_sock, timeout=1000):
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picowireless.client_start(host_address, port, client_sock, TCP_MODE)
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t_start = time.time()
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timeout /= 1000.0
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while time.time() - t_start < timeout:
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state = picowireless.get_client_state(client_sock)
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if state == 4:
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return True
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time.sleep(1.0)
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return False
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def http_request(client_sock, host_address, port, request_host, request_path, handler, timeout=5000):
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print("Connecting to {1}.{2}.{3}.{4}:{0}...".format(port, *host_address))
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if not connect(host_address, port, client_sock):
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print("Connection failed!")
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return False
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print("Connected!")
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http_request = """GET {} HTTP/1.1
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Host: {}
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Connection: close
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""".format(request_path, request_host).replace("\n", "\r\n")
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picowireless.send_data(client_sock, http_request)
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t_start = time.time()
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while True:
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if time.time() - t_start > timeout:
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picowireless.client_stop(client_sock)
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print("HTTP request to {}:{} timed out...".format(host_address, port))
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return False
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avail_length = picowireless.avail_data(client_sock)
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if avail_length > 0:
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break
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print("Got response: {} bytes".format(avail_length))
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response = b""
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while len(response) < avail_length:
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data = picowireless.get_data_buf(client_sock)
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response += data
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response = response.decode("utf-8")
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head, body = response.split("\r\n\r\n", 1)
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dhead = {}
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for line in head.split("\r\n")[1:]:
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key, value = line.split(": ", 1)
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dhead[key] = value
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handler(dhead, body)
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picowireless.client_stop(client_sock)
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picowireless.init()
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print("Connecting to {}...".format(WIFI_SSID))
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picowireless.wifi_set_passphrase(WIFI_SSID, WIFI_PASS)
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while True:
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if picowireless.get_connection_status() == 3:
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break
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print("Connected!")
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ppwhttp.start_wifi()
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ppwhttp.set_dns(ppwhttp.GOOGLE_DNS)
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# Get our own local IP!
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my_ip = picowireless.get_ip_address()
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my_ip = ppwhttp.get_ip_address()
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print("Local IP: {}.{}.{}.{}".format(*my_ip))
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# Resolve and cache the IP address
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picowireless.set_dns(USE_DNS)
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http_address = picowireless.get_host_by_name(HTTP_REQUEST_HOST)
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print("Resolved {} to {}.{}.{}.{}".format(HTTP_REQUEST_HOST, *http_address))
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client_sock = picowireless.get_socket()
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def handler(head, body):
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if head["Status"] == "200 OK":
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@ -108,12 +27,12 @@ def handler(head, body):
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r = int(color[0:2], 16)
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g = int(color[2:4], 16)
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b = int(color[4:6], 16)
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picowireless.set_led(r, g, b)
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ppwhttp.set_led(r, g, b)
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print("Set LED to {} {} {}".format(r, g, b))
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else:
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print("Error: {}".format(head["Status"]))
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while True:
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http_request(client_sock, http_address, HTTP_PORT, HTTP_REQUEST_HOST, HTTP_REQUEST_PATH, handler)
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time.sleep(60.0)
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ppwhttp.http_request(HTTP_REQUEST_HOST, HTTP_REQUEST_PORT, HTTP_REQUEST_HOST, HTTP_REQUEST_PATH, handler)
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time.sleep(HTTP_REQUEST_DELAY)
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@ -0,0 +1,82 @@
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import time
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import plasma
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try:
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import ppwhttp
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except ImportError:
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raise RuntimeError("Cannot find ppwhttp. Have you copied ppwhttp.py to your Pico?")
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"""
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This example uses the Plasma WS2812 LED library to drive a string of LEDs alongside the built-in RGB LED.
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You should wire your LEDs to VBUS/GND and connect the data pin to pin 27 (unused by Pico Wireless).
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"""
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NUM_LEDS = 30 # Number of connected LEDs
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LED_PIN = 27 # LED data pin (27 is unused by Pico Wireless)
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LED_PIO = 0 # Hardware PIO (0 or 1)
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LED_SM = 0 # PIO State-Machine (0 to 3)
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r = 0
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g = 0
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b = 0
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led_strip = plasma.WS2812(NUM_LEDS, LED_PIO, LED_SM, LED_PIN)
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# Edit your routes here
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# Nothing fancy is supported, just plain ol' URLs and GET/POST methods
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@ppwhttp.route("/", methods=["GET", "POST"])
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def get_home(method, url, data=None):
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if method == "POST":
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global r, g, b
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r = int(data.get("r", 0))
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g = int(data.get("g", 0))
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b = int(data.get("b", 0))
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ppwhttp.set_led(r, g, b)
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for i in range(NUM_LEDS):
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led_strip.set_rgb(i, r, g, b)
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print("Set LED to {} {} {}".format(r, g, b))
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return """<form method="post" action="/">
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<input id="r" name="r" type="number" value="{r}" />
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<input name="g" type="number" value="{g}" />
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<input name="b" type="number" value="{b}" />
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<input type="submit" value="Set LED" />
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</form>""".format(r=r, g=g, b=b)
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@ppwhttp.route("/test", methods="GET")
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def get_test(method, url):
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return "Hello World!"
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ppwhttp.start_wifi()
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led_strip.start()
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server_sock = ppwhttp.start_server()
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while True:
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ppwhttp.handle_http_request(server_sock)
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time.sleep(0.01)
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# Whoa there! Did you know you could run the server polling loop
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# on Pico's *other* core!? Here's how:
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#
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# import _thread
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#
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# def server_loop_forever():
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# # Start a server and continuously poll for HTTP requests
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# server_sock = ppwhttp.start_server()
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# while True:
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# ppwhttp.handle_http_request(server_sock)
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# time.sleep(0.01)
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#
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# Handle the server polling loop on the other core!
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# _thread.start_new_thread(server_loop_forever, ())
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#
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# # Your very own main loop for fun and profit!
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# while True:
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# print("Colour: {} {} {}".format(r, g, b))
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# time.sleep(5.0)
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"""Pimoroni Pico Wireless HTTP
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A super-simple HTTP server library for Pico Wireless.
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"""
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import time
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import picowireless
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from micropython import const
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try:
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from secrets import WIFI_SSID, WIFI_PASS
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except ImportError:
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WIFI_SSID = None
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WIFI_PASS = None
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TCP_CLOSED = const(0)
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TCP_LISTEN = const(1)
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CLOUDFLARE_DNS = (1, 1, 1, 1)
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GOOGLE_DNS = (8, 8, 8, 8)
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DEFAULT_HTTP_PORT = const(80)
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routes = {}
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sockets = []
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hosts = {}
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def set_led(r, g, b):
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"""Set """
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picowireless.set_led(r, g, b)
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def get_socket(force_new=False):
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global sockets
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if force_new or len(sockets) == 0:
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socket = picowireless.get_socket()
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sockets.append(socket)
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return socket
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return sockets[0]
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def get_ip_address():
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return picowireless.get_ip_address()
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def set_dns(dns):
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picowireless.set_dns(dns)
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def get_host_by_name(hostname, no_cache=False):
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# Already an IP
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if type(hostname) is tuple and len(hostname) == 4:
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return hostname
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# Get from cached hosts
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if hostname in hosts and not no_cache:
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return hosts[hostname]
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ip = picowireless.get_host_by_name(hostname)
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hosts[hostname] = ip
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return ip
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def start_wifi(wifi_ssid=WIFI_SSID, wifi_pass=WIFI_PASS):
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if wifi_ssid is None or wifi_pass is None:
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raise RuntimeError("WiFi SSID/PASS required. Set them in secrets.py and copy it to your Pico, or pass them as arguments.")
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picowireless.init()
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print("Connecting to {}...".format(wifi_ssid))
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picowireless.wifi_set_passphrase(wifi_ssid, wifi_pass)
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while True:
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if picowireless.get_connection_status() == 3:
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break
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print("Connected!")
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def start_server(http_port=DEFAULT_HTTP_PORT, timeout=5000):
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my_ip = picowireless.get_ip_address()
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print("Starting server...")
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server_sock = picowireless.get_socket()
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picowireless.server_start(http_port, server_sock, 0)
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t_start = time.ticks_ms()
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while time.ticks_ms() - t_start < timeout:
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state = picowireless.get_server_state(server_sock)
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if state == TCP_LISTEN:
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print("Server listening on {1}.{2}.{3}.{4}:{0}".format(http_port, *my_ip))
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return server_sock
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return None
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def connect_to_server(host_address, port, client_sock, timeout=5000):
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picowireless.client_start(host_address, port, client_sock, TCP_CLOSED)
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t_start = time.ticks_ms()
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while time.ticks_ms() - t_start < timeout:
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state = picowireless.get_client_state(client_sock)
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if state == 4:
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return True
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time.sleep(1.0)
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return False
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def http_request(host_address, port, request_host, request_path, handler, timeout=5000, client_sock=None):
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if client_sock is None:
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client_sock = get_socket()
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host_address = get_host_by_name(host_address)
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print("Connecting to {1}.{2}.{3}.{4}:{0}...".format(port, *host_address))
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if not connect_to_server(host_address, port, client_sock):
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print("Connection failed!")
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return False
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print("Connected!")
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http_request = """GET {} HTTP/1.1
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Host: {}
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Connection: close
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""".format(request_path, request_host).replace("\n", "\r\n")
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picowireless.send_data(client_sock, http_request)
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t_start = time.ticks_ms()
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while True:
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if time.ticks_ms() - t_start > timeout:
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picowireless.client_stop(client_sock)
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print("HTTP request to {}:{} timed out...".format(host_address, port))
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return False
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avail_length = picowireless.avail_data(client_sock)
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if avail_length > 0:
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break
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print("Got response: {} bytes".format(avail_length))
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response = b""
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while len(response) < avail_length:
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data = picowireless.get_data_buf(client_sock)
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response += data
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response = response.decode("utf-8")
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head, body = response.split("\r\n\r\n", 1)
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dhead = {}
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for line in head.split("\r\n")[1:]:
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key, value = line.split(": ", 1)
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dhead[key] = value
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handler(dhead, body)
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picowireless.client_stop(client_sock)
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def handle_http_request(server_sock, timeout=5000):
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t_start = time.ticks_ms()
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client_sock = picowireless.avail_server(server_sock)
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if client_sock in [server_sock, 255, -1]:
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return False
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print("Client connected!")
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avail_length = picowireless.avail_data(client_sock)
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if avail_length == 0:
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picowireless.client_stop(client_sock)
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return False
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request = b""
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while len(request) < avail_length:
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data = picowireless.get_data_buf(client_sock)
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request += data
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if time.ticks_ms() - t_start > timeout:
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print("Client timed out getting data!")
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picowireless.client_stop(client_sock)
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return False
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request = request.decode("utf-8")
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if len(request) > 0:
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head, body = request.split("\r\n\r\n", 1)
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dhead = {}
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for line in head.split("\r\n")[1:]:
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key, value = line.split(": ", 1)
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dhead[key] = value
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method, url, _ = head.split("\r\n", 1)[0].split(" ")
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print("Serving {} on {}...".format(method, url))
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response = None
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# Dispatch the request to the relevant route
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if url in routes and method in routes[url] and callable(routes[url][method]):
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if method == "POST":
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data = {}
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for var in body.split("&"):
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key, value = var.split("=")
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data[key] = value
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response = routes[url][method](method, url, data)
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else:
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response = routes[url][method](method, url)
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if response is not None:
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response = "HTTP/1.1 200 OK\r\nContent-Length: {}\r\nContent-Type: text/html\r\n\r\n".format(len(response)) + response
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picowireless.send_data(client_sock, response)
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picowireless.client_stop(client_sock)
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print("Success! Sending 200 OK")
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return True
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else:
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picowireless.send_data(client_sock, "HTTP/1.1 501 Not Implemented\r\nContent-Length: 19\r\n\r\n501 Not Implemented")
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picowireless.client_stop(client_sock)
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print("Unhandled Request! Sending 501 OK")
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return False
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def route(url, methods="GET"):
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if type(methods) is str:
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methods = [methods]
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def decorate(handler):
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for method in methods:
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if url not in routes:
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routes[url] = {}
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routes[url][method] = handler
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return decorate
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@ -1,143 +1,26 @@
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import time
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import picowireless
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from micropython import const
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WIFI_SSID = "your SSID here!"
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WIFI_PASS = "Your PSK here!"
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try:
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import ppwhttp
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except ImportError:
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raise RuntimeError("Cannot find ppwhttp. Have you copied ppwhttp.py to your Pico?")
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TCP_CLOSED = 0
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TCP_LISTEN = 1
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CLOUDFLARE_DNS = (1, 1, 1, 1)
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GOOGLE_DNS = (8, 8, 8, 8)
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TCP_MODE = const(0)
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HTTP_REQUEST_DELAY = const(30)
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HTTP_PORT = 80
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routes = {}
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r = 0
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g = 0
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b = 0
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def start_wifi():
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picowireless.init()
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print("Connecting to {}...".format(WIFI_SSID))
|
||||
picowireless.wifi_set_passphrase(WIFI_SSID, WIFI_PASS)
|
||||
|
||||
while True:
|
||||
if picowireless.get_connection_status() == 3:
|
||||
break
|
||||
print("Connected!")
|
||||
|
||||
|
||||
def start_server(http_port, timeout=1.0):
|
||||
my_ip = picowireless.get_ip_address()
|
||||
print("Starting server...")
|
||||
server_sock = picowireless.get_socket()
|
||||
picowireless.server_start(http_port, server_sock, 0)
|
||||
|
||||
t_start = time.time()
|
||||
|
||||
while time.time() - t_start < timeout:
|
||||
state = picowireless.get_server_state(server_sock)
|
||||
if state == TCP_LISTEN:
|
||||
print("Server listening on {1}.{2}.{3}.{4}:{0}".format(http_port, *my_ip))
|
||||
return server_sock
|
||||
|
||||
return None
|
||||
|
||||
|
||||
def handle_http_request(server_sock, timeout=1.0):
|
||||
t_start = time.time()
|
||||
|
||||
client_sock = picowireless.avail_server(server_sock)
|
||||
if client_sock in [server_sock, 255, -1]:
|
||||
return False
|
||||
|
||||
print("Client connected!")
|
||||
|
||||
avail_length = picowireless.avail_data(client_sock)
|
||||
if avail_length == 0:
|
||||
picowireless.client_stop(client_sock)
|
||||
return False
|
||||
|
||||
request = b""
|
||||
|
||||
while len(request) < avail_length:
|
||||
data = picowireless.get_data_buf(client_sock)
|
||||
request += data
|
||||
if time.time() - t_start > timeout:
|
||||
print("Client timed out getting data!")
|
||||
picowireless.client_stop(client_sock)
|
||||
return False
|
||||
|
||||
request = request.decode("utf-8")
|
||||
|
||||
if len(request) > 0:
|
||||
head, body = request.split("\r\n\r\n", 1)
|
||||
dhead = {}
|
||||
|
||||
for line in head.split("\r\n")[1:]:
|
||||
key, value = line.split(": ", 1)
|
||||
dhead[key] = value
|
||||
|
||||
method, url, _ = head.split("\r\n", 1)[0].split(" ")
|
||||
|
||||
print("Serving {} on {}...".format(method, url))
|
||||
|
||||
response = None
|
||||
|
||||
# Dispatch the request to the relevant route
|
||||
if url in routes and method in routes[url] and callable(routes[url][method]):
|
||||
if method == "POST":
|
||||
data = {}
|
||||
for var in body.split("&"):
|
||||
key, value = var.split("=")
|
||||
data[key] = value
|
||||
response = routes[url][method](method, url, data)
|
||||
else:
|
||||
response = routes[url][method](method, url)
|
||||
|
||||
if response is not None:
|
||||
response = "HTTP/1.1 200 OK\r\nContent-Length: {}\r\nContent-Type: text/html\r\n\r\n".format(len(response)) + response
|
||||
picowireless.send_data(client_sock, response)
|
||||
picowireless.client_stop(client_sock)
|
||||
print("Success! Sending 200 OK")
|
||||
return True
|
||||
else:
|
||||
picowireless.send_data(client_sock, "HTTP/1.1 501 Not Implemented\r\nContent-Length: 19\r\n\r\n501 Not Implemented")
|
||||
picowireless.client_stop(client_sock)
|
||||
print("Unhandled Request! Sending 501 OK")
|
||||
return False
|
||||
|
||||
|
||||
def route(url, methods="GET"):
|
||||
if type(methods) is str:
|
||||
methods = [methods]
|
||||
|
||||
def decorate(handler):
|
||||
for method in methods:
|
||||
if url not in routes:
|
||||
routes[url] = {}
|
||||
routes[url][method] = handler
|
||||
|
||||
return decorate
|
||||
|
||||
|
||||
# Edit your routes here
|
||||
# Nothing fancy is supported, just plain ol' URLs and GET/POST methods
|
||||
@route("/", methods=["GET", "POST"])
|
||||
@ppwhttp.route("/", methods=["GET", "POST"])
|
||||
def get_home(method, url, data=None):
|
||||
if method == "POST":
|
||||
global r, g, b
|
||||
r = int(data.get("r", 0))
|
||||
g = int(data.get("g", 0))
|
||||
b = int(data.get("b", 0))
|
||||
picowireless.set_led(r, g, b)
|
||||
ppwhttp.set_led(r, g, b)
|
||||
print("Set LED to {} {} {}".format(r, g, b))
|
||||
|
||||
return """<form method="post" action="/">
|
||||
|
|
@ -148,16 +31,16 @@ def get_home(method, url, data=None):
|
|||
</form>""".format(r=r, g=g, b=b)
|
||||
|
||||
|
||||
@route("/test", methods="GET")
|
||||
@ppwhttp.route("/test", methods="GET")
|
||||
def get_test(method, url):
|
||||
return "Hello World!"
|
||||
|
||||
|
||||
start_wifi()
|
||||
ppwhttp.start_wifi()
|
||||
|
||||
server_sock = start_server(HTTP_PORT)
|
||||
server_sock = ppwhttp.start_server()
|
||||
while True:
|
||||
handle_http_request(server_sock)
|
||||
ppwhttp.handle_http_request(server_sock)
|
||||
time.sleep(0.01)
|
||||
|
||||
|
||||
|
|
@ -168,9 +51,9 @@ while True:
|
|||
#
|
||||
# def server_loop_forever():
|
||||
# # Start a server and continuously poll for HTTP requests
|
||||
# server_sock = start_server(HTTP_PORT)
|
||||
# server_sock = ppwhttp.start_server()
|
||||
# while True:
|
||||
# handle_http_request(server_sock)
|
||||
# ppwhttp.handle_http_request(server_sock)
|
||||
# time.sleep(0.01)
|
||||
#
|
||||
# Handle the server polling loop on the other core!
|
||||
|
|
|
|||
|
|
@ -0,0 +1,2 @@
|
|||
WIFI_SSID = "your SSID here!"
|
||||
WIFI_PASS = "Your PSK here!"
|
||||
Loading…
Reference in New Issue