Mercurial > templog
annotate server/ts.py @ 97:bf707a3775d2
change default comms_wake
author | Matt Johnston <matt@ucc.asn.au> |
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date | Mon, 16 Jul 2012 22:58:25 +0800 |
parents | 229b740a607f |
children | b2d0887fb306 1a88bb989afb |
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1 #!/usr/bin/env python2.7 |
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2 |
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3 # time that the bluetooth takes to get going? |
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4 EXTRA_WAKEUP = 0 |
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5 |
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6 FETCH_TRIES = 3 |
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7 |
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8 # avoid turning off the bluetooth etc. |
42 | 9 TESTING = False |
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10 |
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11 import sys |
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12 # for wrt |
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13 sys.path.append('/root/python') |
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14 import httplib |
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15 import time |
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16 import traceback |
28 | 17 import binascii |
18 import hmac | |
34 | 19 import zlib |
35 | 20 import urllib |
21 import urllib2 | |
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22 import logging |
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23 |
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24 L = logging.info |
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25 W = logging.warning |
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26 E = logging.error |
28 | 27 |
28 import config | |
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29 |
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30 from utils import monotonic_time, retry, readline, crc16 |
66 | 31 import utils |
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32 |
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33 import bluetooth |
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34 |
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35 def get_socket(addr): |
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36 s = bluetooth.BluetoothSocket( bluetooth.RFCOMM ) |
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37 s.connect((addr, 1)) |
91 | 38 s.setblocking(False) |
39 | |
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40 return s |
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41 |
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42 |
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43 @retry() |
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44 def fetch(sock): |
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45 sock.send("fetch\n") |
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46 |
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47 crc = 0 |
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48 |
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49 lines = [] |
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50 l = readline(sock) |
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51 if l != 'START\n': |
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52 W("Bad expected START line '%s'\n" % l.rstrip('\n')) |
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53 return None |
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54 crc = crc16(l, crc) |
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55 |
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56 while True: |
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57 l = readline(sock) |
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58 |
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59 crc = crc16(l, crc) |
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60 |
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61 if l == 'END\n': |
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62 break |
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63 |
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64 lines.append(l.rstrip('\n')) |
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65 |
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66 for d in lines: |
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67 L("Received: %s" % d) |
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68 |
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69 l = readline(sock) |
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70 recv_crc = None |
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71 try: |
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72 k, v = l.rstrip('\n').split('=') |
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73 if k == 'CRC': |
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74 recv_crc = int(v) |
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75 if recv_crc < 0 or recv_crc > 0xffff: |
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76 recv_crc = None |
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77 except ValueError: |
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78 pass |
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79 |
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80 if recv_crc is None: |
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81 W("Bad expected CRC line '%s'\n" % l.rstrip('\n')) |
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82 return None |
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83 |
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84 if recv_crc != crc: |
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85 W("Bad CRC: calculated 0x%x vs received 0x%x\n" % (crc, recv_crc)) |
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86 return None |
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87 |
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88 return lines |
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89 |
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90 @retry() |
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91 def turn_off(sock): |
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92 if TESTING: |
42 | 93 return 99 |
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94 L("Sending btoff") |
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95 sock.send("btoff\n"); |
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96 # read newline |
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97 l = readline(sock) |
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98 if not l: |
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99 W("Bad response to btoff") |
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100 return None |
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101 |
91 | 102 if not l.startswith('next_wake'): |
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103 W("Bad response to btoff '%s'" % l) |
42 | 104 return None |
91 | 105 L("Next wake line %s" % l) |
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106 |
91 | 107 toks = dict(v.split('=') for v in l.split(',')) |
108 | |
92 | 109 rem = int(toks['rem']) |
110 tick_secs = int(toks['tick_secs']) | |
111 tick_secs = int(toks['tick_wake']) | |
112 next_wake = int(toks['next_wake']) | |
113 | |
114 rem_secs = float(rem) / tick_wake * tick_secs | |
115 | |
116 next_wake_secs = next_wake - rem_secs | |
117 L("next_wake_secs %f\n", next_wake_secs) | |
118 return next_wake_secs | |
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119 |
32 | 120 @retry() |
121 def clear_meas(sock): | |
122 sock.send("clear\n"); | |
123 l = readline(sock) | |
124 if l and l.rstrip() == 'cleared': | |
125 return True | |
126 | |
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127 E("Bad response to clear '%s'" % str(l)) |
32 | 128 return False |
129 | |
28 | 130 def send_results(lines): |
29 | 131 enc_lines = binascii.b2a_base64(zlib.compress('\n'.join(lines))) |
35 | 132 mac = hmac.new(config.HMAC_KEY, enc_lines).hexdigest() |
28 | 133 |
35 | 134 url_data = urllib.urlencode( {'lines': enc_lines, 'hmac': mac} ) |
28 | 135 con = urllib2.urlopen(config.UPDATE_URL, url_data) |
32 | 136 result = con.read(100) |
137 if result == 'OK': | |
138 return True | |
139 else: | |
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140 W("Bad result '%s'" % result) |
32 | 141 return False |
28 | 142 |
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143 def do_comms(sock): |
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144 L("do_comms") |
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145 d = None |
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146 # serial could be unreliable, try a few times |
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147 d = fetch(sock) |
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148 if not d: |
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149 return |
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150 |
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151 res = send_results(d) |
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152 if not res: |
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153 return |
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154 |
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155 clear_meas(sock) |
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156 |
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157 next_wake = turn_off(sock) |
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158 sock.close() |
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159 return next_wake |
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160 |
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161 testcount = 0 |
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162 |
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163 def sleep_for(secs): |
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164 until = monotonic_time() + secs |
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165 while True: |
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166 length = until - monotonic_time() |
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167 if length <= 0: |
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168 return |
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169 time.sleep(length) |
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170 |
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171 def setup_logging(): |
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172 logging.basicConfig(format='%(asctime)s %(message)s', |
91 | 173 datefmt='%m/%d/%Y %I:%M:%S %p', |
174 level=logging.INFO) | |
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175 |
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176 def main(): |
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177 setup_logging() |
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178 |
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179 L("Running templog rfcomm server") |
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180 |
65 | 181 if '--daemon' in sys.argv: |
182 utils.cheap_daemon() | |
183 | |
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184 while True: |
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185 sock = None |
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186 try: |
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187 sock = get_socket(config.BTADDR) |
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188 except Exception, e: |
94 | 189 #logging.exception("Error connecting") |
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190 pass |
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191 next_wake_time = 0 |
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192 if sock: |
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193 try: |
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194 avr_wake = do_comms(sock) |
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195 next_wake_time = time.time() + avr_wake |
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196 except Exception, e: |
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197 logging.exception("Error in do_comms") |
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198 |
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199 next_wake_interval = next_wake_time - time.time() - EXTRA_WAKEUP |
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200 sleep_time = config.SLEEP_TIME |
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201 if next_wake_interval > 0: |
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202 sleep_time = min(next_wake_interval, sleep_time) |
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203 L("Sleeping for %d, next wake time %f" % (sleep_time, next_wake_time)) |
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204 sleep_for(sleep_time) |
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205 |
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206 if __name__ == '__main__': |
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207 main() |