Created
July 27, 2014 18:06
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LPR client
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| #!/usr/bin/env python | |
| # -*- coding: utf-8 -*- | |
| import socket | |
| import select | |
| class RSerialError(IOError): | |
| pass | |
| class RSerial(object): | |
| def __init__(self): | |
| self.connect() | |
| def connect(self): | |
| self.conn = socket.socket() | |
| udp = socket.socket(socket.AF_INET, socket.SOCK_DGRAM) | |
| udp.setsockopt(socket.SOL_SOCKET, socket.SO_BROADCAST, True) | |
| udp.sendto("gimme your address, please", ("255.255.255.255", 1235)) | |
| if not select.select([udp], [], [], 1): | |
| raise RSerialError("couldn't discover the server address.") | |
| _, addr_and_port = udp.recvfrom(2048) | |
| addr = addr_and_port[0] | |
| self.conn.connect((addr, 9100)) | |
| def write(self, data): | |
| try: | |
| self.conn.send(data) | |
| except socket.error, e: | |
| self.connect() | |
| self.write(data) | |
| def __del__(self): | |
| self.conn.close() |
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