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annotate server/ts.py @ 162:d73077e8cd67

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Add daemon mode with locking, add "disabled" parameter
author Matt Johnston <matt@ucc.asn.au>
date Fri, 11 Jan 2013 23:41:56 +0800
parents 94330d90f11f
children
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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 = -3
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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.
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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
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17 import binascii
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18 import hmac
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19 import zlib
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20 import urllib
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21 import urllib2
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22 import logging
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23 import socket
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24
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25 L = logging.info
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26 W = logging.warning
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27 E = logging.error
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28
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29 import config
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30
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31 from utils import monotonic_time, retry, readline, crc16
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32 import utils
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33
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34 import bluetooth
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35
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36 def get_socket(addr):
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37 s = bluetooth.BluetoothSocket( bluetooth.RFCOMM )
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38 L("connecting")
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39 s.connect((addr, 1))
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40 s.setblocking(False)
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41 s.settimeout(1)
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42
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43 return s
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45
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46 def flush(sock):
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47 ret = []
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48 while True:
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49 l = readline(sock)
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50 if l:
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51 ret.append(l)
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52 else:
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53 break
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54 return ret
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55
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56 def encode_extra(extra_lines):
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57 return ['extra%d=%s' % (n, l.strip()) for (n,l) in enumerate(extra_lines)]
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58
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59 @retry()
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60 def fetch(sock):
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61 extra_lines = flush(sock)
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62 sock.send("fetch\n")
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63
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64 crc = 0
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65
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66 lines = []
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67 l = readline(sock)
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68 if not l:
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69 return None
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70
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71 if l != 'START\n':
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72 W("Bad expected START line '%s'\n" % l.rstrip('\n'))
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73 extra_lines.append(l)
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74 return encode_extra(extra_lines)
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75 crc = crc16(l, crc)
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76
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77 while True:
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78 l = readline(sock)
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79
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80 crc = crc16(l, crc)
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81
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82 if l == 'END\n':
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83 break
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84
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85 lines.append(l.rstrip('\n'))
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87 lines += encode_extra(extra_lines)
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88
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89 for d in lines:
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90 L("Received: %s" % d)
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91
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92 l = readline(sock)
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93 recv_crc = None
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94 try:
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95 k, v = l.rstrip('\n').split('=')
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96 if k == 'CRC':
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97 recv_crc = int(v)
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98 if recv_crc < 0 or recv_crc > 0xffff:
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99 recv_crc = None
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100 except ValueError:
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101 pass
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102
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103 if recv_crc is None:
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104 W("Bad expected CRC line '%s'\n" % l.rstrip('\n'))
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105 return None
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106
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107 if recv_crc != crc:
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108 W("Bad CRC: calculated 0x%x vs received 0x%x\n" % (crc, recv_crc))
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109 return None
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110
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111 return lines
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112
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113 @retry()
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114 def turn_off(sock):
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115 if TESTING:
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116 return 99
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117 L("Sending btoff")
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118 flush(sock)
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119 sock.send("btoff\n");
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120 # read newline
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121 l = readline(sock)
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122 if not l:
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123 W("Bad response to btoff")
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124 return None
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125
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126 if not l.startswith('next_wake'):
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127 W("Bad response to btoff '%s'" % l)
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128 return None
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129 L("Next wake line %s" % l)
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130
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131 toks = dict(v.split('=') for v in l.split(','))
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132
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133 rem = int(toks['rem'])
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134 tick_secs = int(toks['tick_secs'])
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135 tick_wake = int(toks['tick_wake']) + 1
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136 next_wake = int(toks['next_wake'])
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137
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138 rem_secs = float(rem) / tick_wake * tick_secs
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139
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140 next_wake_secs = next_wake - rem_secs
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141 L("next_wake_secs %f\n", next_wake_secs)
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142 return next_wake_secs
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143
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144 @retry()
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145 def clear_meas(sock):
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146 flush(sock)
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147 sock.send("clear\n");
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148 l = readline(sock)
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149 if l and l.rstrip() == 'cleared':
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150 return True
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151
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152 E("Bad response to clear '%s'" % str(l))
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153 return False
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154
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155 def send_results(lines):
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156 enc_lines = binascii.b2a_base64(zlib.compress('\n'.join(lines)))
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157 mac = hmac.new(config.HMAC_KEY, enc_lines).hexdigest()
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158
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159 url_data = urllib.urlencode( {'lines': enc_lines, 'hmac': mac} )
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160 con = urllib2.urlopen(config.UPDATE_URL, url_data)
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161 result = con.read(100)
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162 if result == 'OK':
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163 return True
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164 else:
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165 W("Bad result '%s'" % result)
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166 return False
28
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167
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168 def do_comms(sock):
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169 L("do_comms")
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170 d = None
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171 # serial could be unreliable, try a few times
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172 d = fetch(sock)
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173 if not d:
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174 return
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175
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176 res = send_results(d)
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177 if not res:
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178 return
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179
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180 clear_meas(sock)
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181
117
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182 next_wake = 600
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183 #next_wake = turn_off(sock)
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184 #sock.close()
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185 return next_wake
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186
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187 testcount = 0
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188
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189 def sleep_for(secs):
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190 until = monotonic_time() + secs
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191 while True:
24
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192 length = until - monotonic_time()
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193 if length <= 0:
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194 return
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195 time.sleep(length)
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196
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197 def setup_logging():
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198 logging.basicConfig(format='%(asctime)s %(message)s',
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199 datefmt='%m/%d/%Y %I:%M:%S %p',
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200 level=logging.INFO)
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201
139
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202 def get_net_socket(host, port):
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203 s = socket.create_connection((host, port))
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204 s.setblocking(False)
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205 s.settimeout(1)
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206 return s
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207
22
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208 def main():
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209 setup_logging()
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210
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211 L("Running templog rfcomm server")
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212
65
b09c164debf6 cheap_daemon()
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213 if '--daemon' in sys.argv:
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214 utils.cheap_daemon()
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215
96
b2d0887fb306 be quicker responding
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216 next_wake_time = 0
139
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217
22
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218 while True:
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219 sock = None
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220 try:
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221 sock = get_net_socket(config.SERIAL_HOST, config.SERIAL_PORT)
23
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222 except Exception, e:
94
229b740a607f use the remainder of times
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223 #logging.exception("Error connecting")
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224 pass
139
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225
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226 if not sock:
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227 sleep_for(config.SLEEP_TIME)
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228 continue
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229
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230 while True:
22
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231 try:
139
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232 do_comms(sock)
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233 sleep_for(config.SLEEP_TIME)
22
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234 except Exception, e:
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235 logging.exception("Error in do_comms")
139
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236 break
22
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237
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238 if __name__ == '__main__':
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239 main()