Python usocket.getaddrinfo() Examples

def main(use_stream=True):
    while True:
        d.measure()
        data = b"api_key="+ API_KEY + "&field1=" + str(d.temperature()) + "&field2=" + str(d.humidity())
      
        s = _socket.socket()
        ai = _socket.getaddrinfo(HOST, 443)
        addr = ai[0][-1]
        s.connect(addr)
    
        s = ssl.wrap_socket(s)
    
        
        s.write("POST /update HTTP/1.0\r\n")
        s.write("Host: " + HOST + "\r\n")
        s.write("Content-Length: " + str(len(data)) + "\r\n\r\n")
        s.write(data)
        print(s.read(128))
    
        s.close()
        time.sleep(60) 

def __init__(self, server, port):
        # On ESP32 need to submit WiFi credentials
        self._sta_if = network.WLAN(network.STA_IF)
        self._sta_if.active(True)
        # Note that the following blocks, potentially for seconds, owing to DNS lookup
        self._addr = socket.getaddrinfo(server, port)[0][-1]
        self._sock = socket.socket()
        self._sock.setblocking(False)
        try:
            self._sock.connect(addr)
        except OSError as e:
            if e.args[0] not in BUSY_ERRORS:
                raise
        if ESP32:  # Revolting kludge :-(
            loop = asyncio.get_event_loop()
            loop.create_task(self._idle_task()) 

def __init__(self, client_id, server, port=0, user=None, password=None, keepalive=0,
                 ssl=False, ssl_params={}):
        if port == 0:
            port = 8883 if ssl else 1883
        self.client_id = client_id
        self.sock = None
        self.addr = socket.getaddrinfo(server, port)[0][-1]
        self.ssl = ssl
        self.ssl_params = ssl_params
        self.pid = 0
        self.cb = None
        self.user = user
        self.pswd = password
        self.keepalive = keepalive
        self.lw_topic = None
        self.lw_msg = None
        self.lw_qos = 0
        self.lw_retain = False 

def run(timeout, nconns=10, verbose=False):
    addr = socket.getaddrinfo('0.0.0.0', PORT, 0, socket.SOCK_STREAM)[0][-1]
    s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
    s.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
    socks.append(s)
    s.bind(addr)
    s.listen(nconns)
    verbose and print('Awaiting connection.')
    while True:
        yield asyncio.IORead(s)  # Register socket for polling
        conn, addr = s.accept()
        conn.setblocking(False)
        try:
            idstr = await readline(conn, timeout)
            verbose and print('Got connection from client', idstr)
            socks.append(conn)
            Connection.go(int(idstr), timeout, verbose, conn)
        except OSError:
            if conn is not None:
                conn.close()

# A Connection persists even if client dies (minimise object creation).
# If client dies Connection is closed: .close() flags this state by closing its
# socket and setting .conn to None (.ok() == False). 

def start_server(client_coro, host, port, backlog=10):
    if DEBUG and __debug__:
        log.debug("start_server(%s, %s)", host, port)
    ai = _socket.getaddrinfo(host, port, 0, _socket.SOCK_STREAM)
    ai = ai[0]
    s = _socket.socket(ai[0], ai[1], ai[2])
    s.setblocking(False)

    s.setsockopt(_socket.SOL_SOCKET, _socket.SO_REUSEADDR, 1)
    s.bind(ai[-1])
    s.listen(backlog)
    while True:
        if DEBUG and __debug__:
            log.debug("start_server: Before accept")
        yield IORead(s)
        if DEBUG and __debug__:
            log.debug("start_server: After iowait")
        s2, client_addr = s.accept()
        s2.setblocking(False)
        if DEBUG and __debug__:
            log.debug("start_server: After accept: %s", s2)
        extra = {"peername": client_addr}
        yield client_coro(StreamReader(s2), StreamWriter(s2, extra)) 

def open_connection(host, port):
    try:
        import usocket as socket
    except ImportError:
        import socket
    ai = socket.getaddrinfo(host, port)[0] # TODO this is blocking!
    s = socket.socket()
    s.setblocking(False)
    ss = Stream(s)
    try:
        s.connect(ai[-1])
    except OSError as er:
        if er.args[0] != 115: # EINPROGRESS
            raise er
    yield _io_queue.queue_write(s)
    return ss, ss

# Class representing a TCP stream server, can be closed and used in "async with" 

def run(self, host='0.0.0.0', port=5000, debug=False):
        self.debug = debug

        s = socket.socket()
        ai = socket.getaddrinfo(host, port)
        addr = ai[0][-1]

        if self.debug:  # pragma: no cover
            print('Starting {mode} server on {host}:{port}...'.format(
                mode=concurrency_mode, host=host, port=port))
        s.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
        s.bind(addr)
        s.listen(5)

        while True:
            sock, addr = s.accept()
            create_thread(self.dispatch_request, sock, addr) 

def __init__(self, client_id, server, port=0, user=None, password=None, keepalive=0,
                 ssl=False, ssl_params={}):
        if port == 0:
            port = 8883 if ssl else 1883
        self.client_id = client_id
        self.sock = None
        self.addr = socket.getaddrinfo(server, port)[0][-1]
        self.ssl = ssl
        self.ssl_params = ssl_params
        self.pid = 0
        self.cb = None
        self.user = user
        self.pswd = password
        self.keepalive = keepalive
        self.lw_topic = None
        self.lw_msg = None
        self.lw_qos = 0
        self.lw_retain = False 

def start_server(client_coro, host, port, backlog=10):
    if DEBUG and __debug__:
        log.debug("start_server(%s, %s)", host, port)
    ai = _socket.getaddrinfo(host, port, 0, _socket.SOCK_STREAM)
    ai = ai[0]
    s = _socket.socket(ai[0], ai[1], ai[2])
    s.setblocking(False)

    s.setsockopt(_socket.SOL_SOCKET, _socket.SO_REUSEADDR, 1)
    s.bind(ai[-1])
    s.listen(backlog)
    while True:
        if DEBUG and __debug__:
            log.debug("start_server: Before accept")
        yield IORead(s)
        if DEBUG and __debug__:
            log.debug("start_server: After iowait")
        s2, client_addr = s.accept()
        s2.setblocking(False)
        if DEBUG and __debug__:
            log.debug("start_server: After accept: %s", s2)
        extra = {"peername": client_addr}
        yield client_coro(StreamReader(s2), StreamWriter(s2, extra)) 

def run(self, loop, port=8123):
        addr = socket.getaddrinfo('0.0.0.0', port, 0, socket.SOCK_STREAM)[0][-1]
        s_sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)  # server socket
        s_sock.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
        s_sock.bind(addr)
        s_sock.listen(5)
        self.socks = [s_sock]  # List of current sockets for .close()
        print('Awaiting connection on port', port)
        poller = select.poll()
        poller.register(s_sock, select.POLLIN)
        client_id = 1  # For user feedback
        while True:
            res = poller.poll(1)  # 1ms block
            if res:  # Only s_sock is polled
                c_sock, _ = s_sock.accept()  # get client socket
                loop.create_task(self.run_client(c_sock, client_id))
                client_id += 1
            await asyncio.sleep_ms(200) 

def socket_connect(self):
        if self.sock is not None:
            self.sock.close()
        try:
            self.sock = socket.socket()
            addr = socket.getaddrinfo(self.server, self.port)
            if addr == []:
                if self.addr_save:
                    try:
                        self.socket_connect(self.addr_save)
                        return
                    except:
                        raise OSError('addr get fail')
            addr = addr[0][-1]
            self.addr_save = addr
            self.sock.connect(addr)
            return True
        except OSError:
            return False 

def start_server(client_coro, host, port, backlog=10):
    if DEBUG and __debug__:
        log.debug("start_server(%s, %s)", host, port)
    ai = _socket.getaddrinfo(host, port, 0, _socket.SOCK_STREAM)
    ai = ai[0]
    s = _socket.socket(ai[0], ai[1], ai[2])
    s.setblocking(False)

    s.setsockopt(_socket.SOL_SOCKET, _socket.SO_REUSEADDR, 1)
    s.bind(ai[-1])
    s.listen(backlog)
    while True:
        if DEBUG and __debug__:
            log.debug("start_server: Before accept")
        yield IORead(s)
        if DEBUG and __debug__:
            log.debug("start_server: After iowait")
        s2, client_addr = s.accept()
        s2.setblocking(False)
        if DEBUG and __debug__:
            log.debug("start_server: After accept: %s", s2)
        extra = {"peername": client_addr}
        yield client_coro(StreamReader(s2), StreamWriter(s2, extra)) 

def start_server(client_coro, host, port, backlog=10):
    if DEBUG and __debug__:
        log.debug("start_server(%s, %s)", host, port)
    ai = _socket.getaddrinfo(host, port, 0, _socket.SOCK_STREAM)
    ai = ai[0]
    s = _socket.socket(ai[0], ai[1], ai[2])
    s.setblocking(False)

    s.setsockopt(_socket.SOL_SOCKET, _socket.SO_REUSEADDR, 1)
    s.bind(ai[-1])
    s.listen(backlog)
    while True:
        if DEBUG and __debug__:
            log.debug("start_server: Before accept")
        yield IORead(s)
        if DEBUG and __debug__:
            log.debug("start_server: After iowait")
        s2, client_addr = s.accept()
        s2.setblocking(False)
        if DEBUG and __debug__:
            log.debug("start_server: After accept: %s", s2)
        extra = {"peername": client_addr}
        yield client_coro(StreamReader(s2), StreamWriter(s2, extra)) 

def run():
    sock = socket.socket()
    def close():
        sock.close()
        print('Server disconnect.')
    try:
        serv = socket.getaddrinfo(server, port)[0][-1]
        sock.connect(serv)
    except OSError as e:
        print('Cannot connect to {} on port {}'.format(server, port))
        sock.close()
        return
    while True:
        sreader = asyncio.StreamReader(sock)
        swriter = asyncio.StreamWriter(sock, {})
        data = ['value', 1]
        while True:
            try:
                await swriter.awrite('{}\n'.format(ujson.dumps(data)))
                res = await sreader.readline()
            except OSError:
                close()
                return
            try:
                print('Received', ujson.loads(res))
            except ValueError:
                close()
                return
            await asyncio.sleep(2)
            data[1] += 1 

def connect(self):
        if not self._has_connected:
            await self.wifi_connect()  # On 1st call, caller handles error
            # Note this blocks if DNS lookup occurs. Do it once to prevent
            # blocking during later internet outage:
            self._addr = socket.getaddrinfo(self.server, self.port)[0][-1]
        self._in_connect = True  # Disable low level ._isconnected check
        clean = self._clean if self._has_connected else self._clean_init
        try:
            await self._connect(clean)
        except Exception:
            self.close()
            raise
        self.rcv_pids.clear()
        # If we get here without error broker/LAN must be up.
        self._isconnected = True
        self._in_connect = False  # Low level code can now check connectivity.
        loop = asyncio.get_event_loop()
        loop.create_task(self._wifi_handler(True))  # User handler.
        if not self._has_connected:
            self._has_connected = True  # Use normal clean flag on reconnect.
            loop.create_task(
                self._keep_connected())  # Runs forever unless user issues .disconnect()

        loop.create_task(self._handle_msg())  # Tasks quit on connection fail.
        loop.create_task(self._keep_alive())
        if self.DEBUG:
            loop.create_task(self._memory())
        loop.create_task(self._connect_handler(self))  # User handler.

    # Launched by .connect(). Runs until connectivity fails. Checks for and
    # handles incoming messages. 

def open_connection(host, port, ssl=False):
    if DEBUG and __debug__:
        log.debug("open_connection(%s, %s)", host, port)
    ai = _socket.getaddrinfo(host, port, 0, _socket.SOCK_STREAM)
    ai = ai[0]
    s = _socket.socket(ai[0], ai[1], ai[2])
    s.setblocking(False)
    try:
        s.connect(ai[-1])
    except OSError as e:
        if e.args[0] != uerrno.EINPROGRESS:
            raise
    if DEBUG and __debug__:
        log.debug("open_connection: After connect")
    yield IOWrite(s)
#    if __debug__:
#        assert s2.fileno() == s.fileno()
    if DEBUG and __debug__:
        log.debug("open_connection: After iowait: %s", s)
    if ssl:
        print("Warning: uasyncio SSL support is alpha")
        import ussl
        s.setblocking(True)
        s2 = ussl.wrap_socket(s)
        s.setblocking(False)
        return StreamReader(s, s2), StreamWriter(s2, {})
    return StreamReader(s), StreamWriter(s, {}) 

def open_connection(host, port, ssl=False):
    if DEBUG and __debug__:
        log.debug("open_connection(%s, %s)", host, port)
    ai = _socket.getaddrinfo(host, port, 0, _socket.SOCK_STREAM)
    ai = ai[0]
    s = _socket.socket(ai[0], ai[1], ai[2])
    s.setblocking(False)
    try:
        s.connect(ai[-1])
    except OSError as e:
        if e.args[0] != uerrno.EINPROGRESS:
            raise
    if DEBUG and __debug__:
        log.debug("open_connection: After connect")
    yield IOWrite(s)
    #    if __debug__:
    #        assert s2.fileno() == s.fileno()
    if DEBUG and __debug__:
        log.debug("open_connection: After iowait: %s", s)
    if ssl:
        print("Warning: uasyncio SSL support is alpha")
        import ussl
        s.setblocking(True)
        s2 = ussl.wrap_socket(s)
        s.setblocking(False)
        return StreamReader(s, s2), StreamWriter(s2, {})
    return StreamReader(s), StreamWriter(s, {}) 

def _get_socket(self):
        try:
            self._state = self.CONNECTING
            self._socket = socket.socket()
            self._socket.connect(socket.getaddrinfo(self.server, self.port)[0][-1])
            self._set_socket_timeout(self.SOCK_TIMEOUT)
            self.log('Connected to server')
        except Exception as g_exc:
            raise BlynkError('Server connection failed: {}'.format(g_exc)) 

def open_connection(host, port, ssl=False):
    if DEBUG and __debug__:
        log.debug("open_connection(%s, %s)", host, port)
    ai = _socket.getaddrinfo(host, port, 0, _socket.SOCK_STREAM)
    ai = ai[0]
    s = _socket.socket(ai[0], ai[1], ai[2])
    s.setblocking(False)
    try:
        s.connect(ai[-1])
    except OSError as e:
        if e.args[0] != uerrno.EINPROGRESS:
            raise
    if DEBUG and __debug__:
        log.debug("open_connection: After connect")
    yield IOWrite(s)
#    if __debug__:
#        assert s2.fileno() == s.fileno()
    if DEBUG and __debug__:
        log.debug("open_connection: After iowait: %s", s)
    if ssl:
        print("Warning: uasyncio SSL support is alpha")
        import ussl
        s.setblocking(True)
        s2 = ussl.wrap_socket(s)
        s.setblocking(False)
        return StreamReader(s, s2), StreamWriter(s2, {})
    return StreamReader(s), StreamWriter(s, {}) 

def open_connection(host, port, ssl=False):
    if DEBUG and __debug__:
        log.debug("open_connection(%s, %s)", host, port)
    ai = _socket.getaddrinfo(host, port, 0, _socket.SOCK_STREAM)
    ai = ai[0]
    s = _socket.socket(ai[0], ai[1], ai[2])
    s.setblocking(False)
    try:
        s.connect(ai[-1])
    except OSError as e:
        if e.args[0] != uerrno.EINPROGRESS:
            raise
    if DEBUG and __debug__:
        log.debug("open_connection: After connect")
    yield IOWrite(s)
#    if __debug__:
#        assert s2.fileno() == s.fileno()
    if DEBUG and __debug__:
        log.debug("open_connection: After iowait: %s", s)
    if ssl:
        print("Warning: uasyncio SSL support is alpha")
        import ussl
        s.setblocking(True)
        s2 = ussl.wrap_socket(s)
        s.setblocking(False)
        return StreamReader(s, s2), StreamWriter(s2, {})
    return StreamReader(s), StreamWriter(s, {}) 

def open_connection(host, port, ssl=False):
    if DEBUG and __debug__:
        log.debug("open_connection(%s, %s)", host, port)
    ai = _socket.getaddrinfo(host, port, 0, _socket.SOCK_STREAM)
    ai = ai[0]
    s = _socket.socket(ai[0], ai[1], ai[2])
    s.setblocking(False)
    try:
        s.connect(ai[-1])
    except OSError as e:
        if e.args[0] != uerrno.EINPROGRESS:
            raise
    if DEBUG and __debug__:
        log.debug("open_connection: After connect")
    yield IOWrite(s)
#    if __debug__:
#        assert s2.fileno() == s.fileno()
    if DEBUG and __debug__:
        log.debug("open_connection: After iowait: %s", s)
    if ssl:
        print("Warning: uasyncio SSL support is alpha")
        import ussl
        s.setblocking(True)
        s2 = ussl.wrap_socket(s)
        s.setblocking(False)
        return StreamReader(s, s2), StreamWriter(s2, {})
    return StreamReader(s), StreamWriter(s, {}) 

def __init__(self, host, port=HTTP_PORT):
        self.host = host
        self.port = int(port)
        addr_info = socket.getaddrinfo(host, port)
        self.addr = addr_info[0][-1]
        self.connected = False
        self.socket = socket.socket() 

def open_connection(host, port, ssl=False):
    if DEBUG and __debug__:
        log.debug("open_connection(%s, %s)", host, port)
    ai = _socket.getaddrinfo(host, port, 0, _socket.SOCK_STREAM)
    ai = ai[0]
    s = _socket.socket(ai[0], ai[1], ai[2])
    s.setblocking(False)
    try:
        s.connect(ai[-1])
    except OSError as e:
        if e.args[0] != uerrno.EINPROGRESS:
            raise
    if DEBUG and __debug__:
        log.debug("open_connection: After connect")
    yield IOWrite(s)
#    if __debug__:
#        assert s2.fileno() == s.fileno()
    if DEBUG and __debug__:
        log.debug("open_connection: After iowait: %s", s)
    if ssl:
        print("Warning: uasyncio SSL support is alpha")
        import ussl
        s.setblocking(True)
        s2 = ussl.wrap_socket(s)
        s.setblocking(False)
        return StreamReader(s, s2), StreamWriter(s2, {})
    return StreamReader(s), StreamWriter(s, {}) 

def __init__(self, timeout, loop):
        self.timeout = timeout
        self.led = Pin(2, Pin.OUT, value = 1)
        self._sta_if = network.WLAN(network.STA_IF)
        self._sta_if.active(True)
        self.server = socket.getaddrinfo(SERVER, PORT)[0][-1]  # server read
        self.evfail = asyn.Event(100)
        self.lock = asyn.Lock(100)  # 100ms pause
        self.connects = 0  # Connect count
        self.sock = None
        loop.create_task(self._run(loop))

    # Make an attempt to connect to WiFi. May not succeed. 

def _serve(self, cb, host, port, backlog):
        try:
            import usocket as socket
        except ImportError:
            import socket
        ai = socket.getaddrinfo(host, port)[0] # TODO this is blocking!
        s = socket.socket()
        s.setblocking(False)
        s.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
        s.bind(ai[-1])
        s.listen(backlog)
        self.task = cur_task
        # Accept incoming connections
        while True:
            try:
                yield _io_queue.queue_read(s)
            except CancelledError:
                # Shutdown server
                s.close()
                return
            s2, addr = s.accept()
            s2.setblocking(False)
            s2s = Stream(s2, {'peername': addr})
            create_task(cb(s2s, s2s))

# Helper function to start a TCP stream server, running as a new task
# TODO could use an accept-callback on socket read activity instead of creating a task 

def run(expected, verbose=False, port=8123, timeout=2000):
    addr = socket.getaddrinfo('0.0.0.0', port, 0, socket.SOCK_STREAM)[0][-1]
    s_sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)  # server socket
    s_sock.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
    s_sock.bind(addr)
    s_sock.listen(len(expected) + 2)
    verbose and print('Awaiting connection.', port)
    poller = select.poll()
    poller.register(s_sock, select.POLLIN)
    to_secs = timeout / 1000  # ms -> secs
    while True:
        res = poller.poll(1)  # 1ms block
        if res:  # Only s_sock is polled
            c_sock, _ = s_sock.accept()  # get client socket
            c_sock.setblocking(False)
            try:
                data = await _readid(c_sock, to_secs)
            except OSError:
                c_sock.close()
            else:
                Connection.go(to_secs, data, verbose, c_sock, s_sock,
                              expected)
        await asyncio.sleep(0.2)


# A Connection persists even if client dies (minimise object creation).
# If client dies Connection is closed: ._close() flags this state by closing its
# socket and setting .sock to None (.status() == False). 

def time():
    NTP_QUERY = bytearray(48)
    NTP_QUERY[0] = 0x1b
    addr = socket.getaddrinfo(host, 123)[0][-1]
    s = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
    s.settimeout(1)
    res = s.sendto(NTP_QUERY, addr)
    msg = s.recv(48)
    s.close()
    val = struct.unpack("!I", msg[40:44])[0]
    return val - NTP_DELTA

# There's currently no timezone support in MicroPython, so
# utime.localtime() will return UTC time (as if it was .gmtime()) 

def time():
    NTP_QUERY = bytearray(48)
    NTP_QUERY[0] = 0x1b
    addr = socket.getaddrinfo(host, 123)[0][-1]
    s = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
    s.settimeout(1)
    res = s.sendto(NTP_QUERY, addr)
    msg = s.recv(48)
    s.close()
    val = struct.unpack("!I", msg[40:44])[0]
    return val - NTP_DELTA

# There's currently no timezone support in MicroPython, so
# utime.localtime() will return UTC time (as if it was .gmtime()) 

def time():
    NTP_QUERY = bytearray(48)
    NTP_QUERY[0] = 0x1b
    addr = socket.getaddrinfo(host, 123)[0][-1]
    s = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
    s.settimeout(1)
    res = s.sendto(NTP_QUERY, addr)
    msg = s.recv(48)
    s.close()
    val = struct.unpack("!I", msg[40:44])[0]
    return val - NTP_DELTA

# There's currently no timezone support in MicroPython, so
# utime.localtime() will return UTC time (as if it was .gmtime()) 

def time():
    NTP_QUERY = bytearray(48)
    NTP_QUERY[0] = 0x1b
    addr = socket.getaddrinfo(host, 123)[0][-1]
    s = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
    s.settimeout(1)
    res = s.sendto(NTP_QUERY, addr)
    msg = s.recv(48)
    s.close()
    val = struct.unpack("!I", msg[40:44])[0]
    return val - NTP_DELTA

# There's currently no timezone support in MicroPython, so
# utime.localtime() will return UTC time (as if it was .gmtime())