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annotate server/ts.py @ 339:449272fc63a3

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- Debug log file for server - Fix some variable sizes, turn off local echo for avr code - symlink config for wrt server
author Matt Johnston <matt@ucc.asn.au>
date Fri, 15 Jun 2012 23:34:24 +0800
parents 12123e390169
children 79124d7d3f79
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1 #!/usr/bin/env python2.7
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2
328
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3 BTADDR = "00:12:03:27:70:88"
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4 SLEEP_TIME = 180
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5 # time that the bluetooth takes to get going?
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6 EXTRA_WAKEUP = 0
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7
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8 FETCH_TRIES = 3
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9
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10 # avoid turning off the bluetooth etc.
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11 TESTING = True
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12
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13 import sys
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14 # for wrt
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15 sys.path.append('/root/python')
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16 import httplib
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17 import time
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18 import traceback
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19 import binascii
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20 import hmac
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21
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22 import config
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23
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24 from utils import monotonic_time, retry, readline, crc16
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25
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26 lightblue = None
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27 try:
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28 import lightblue
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29 except ImportError:
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30 import bluetooth
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31
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32 def get_socket(addr):
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33 if lightblue:
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34 s = lightblue.socket()
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35 s.connect((addr, 1))
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36 s.settimeout(3)
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37 else:
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38 s = bluetooth.BluetoothSocket( bluetooth.RFCOMM )
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39 s.connect((addr, 1))
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40
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41 s.setblocking(False)
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42
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43 return s
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44
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45
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46 @retry()
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47 def fetch(sock):
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48 print "fetch"
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49 sock.send("fetch\n")
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50
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51 crc = 0
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52
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53 lines = []
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54 l = readline(sock)
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55 if l != 'START\n':
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56 print>>sys.stderr, "Bad expected START line '%s'\n" % l.rstrip('\n')
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57 return None
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58 crc = crc16(l, crc)
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59 lines.append(l)
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60
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61 while True:
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62 l = readline(sock)
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63
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64 crc = crc16(l, crc)
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65
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66 if l == 'END\n':
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67 break
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68
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69 lines.append(l.rstrip('\n'))
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70
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71 print lines
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72
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73 l = readline(sock)
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74 recv_crc = None
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75 try:
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76 k, v = l.rstrip('\n').split('=')
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77 print k,v
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78 if k == 'CRC':
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79 recv_crc = int(v)
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80 if recv_crc < 0 or recv_crc > 0xffff:
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81 recv_crc = None
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82 except ValueError:
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83 pass
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84
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85 if recv_crc is None:
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86 print>>sys.stderr, "Bad expected CRC line '%s'\n" % l.rstrip('\n')
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87 return None
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88
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89 if recv_crc != crc:
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90 print>>sys.stderr, "Bad CRC: calculated 0x%x vs received 0x%x\n" % (crc, recv_crc)
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91 return None
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92
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93 return lines
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94
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95 @retry()
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96 def turn_off(sock):
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97 if TESTING:
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98 return None
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99 sock.send("btoff\n");
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100 # read newline
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101 l = readline(sock)
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102 if not l:
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103 print>>sys.stderr, "Bad response to btoff\n"
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104 return None
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105
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106 off, next_wake = l.rstrip().split(':')
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107 if off != 'Off':
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108 print>>sys.stderr, "Bad response to btoff '%s'\n" % l
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109
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110 return int(next_wake)
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111
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112 @retry()
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113 def clear_meas(sock):
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114 sock.send("clear\n");
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115 l = readline(sock)
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116 if l and l.rstrip() == 'cleared':
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117 return True
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118
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119 print>>sys.stderr, "Bad response to clear %s\n" % str(l)
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120 return False
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121
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122 def send_results(lines):
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123 enc_lines = binascii.b2a_base64(zlib.compress('\n'.join(lines)))
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124 hmac.new(config.HMAC_KEY, enc_lines).hexdigest()
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125
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126 url_data = urllib.url_encode( ('lines', enc_lines), ('hmac', mac) )
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127 con = urllib2.urlopen(config.UPDATE_URL, url_data)
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128 result = con.read(100)
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129 if result == 'OK':
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130 return True
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131 else:
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132 print>>sys.stderr, "Bad result '%s'" % result
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133 return False
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134
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135 def do_comms(sock):
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136 print "do_comms"
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137 d = None
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138 # serial could be unreliable, try a few times
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139 for i in range(FETCH_TRIES):
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140 d = fetch(sock)
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141 if d:
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142 break
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143 time.sleep(1)
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144 if not d:
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145 return
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146
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147 res = send_results(d)
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148 if not res:
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149 return
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150
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151 clear_meas(sock)
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152
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153 next_wake = turn_off(sock)
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154 sock.close()
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155 return next_wake
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156
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157 testcount = 0
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158
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159 def sleep_for(secs):
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160 until = monotonic_time() + secs
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161 while True:
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162 length = until - monotonic_time()
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163 if length <= 0:
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164 return
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165 time.sleep(length)
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166
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167 def main():
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168
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169 while True:
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170 sock = None
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171 try:
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172 sock = get_socket(BTADDR)
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173 except Exception, e:
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174 print>>sys.stderr, "Error connecting:"
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175 traceback.print_exc(file=sys.stderr)
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176 sleep_time = SLEEP_TIME
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177 if sock:
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178 next_wake = None
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179 try:
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180 next_wake = do_comms(sock)
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181 except Exception, e:
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182 print>>sys.stderr, "Error in do_comms:"
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183 traceback.print_exc(file=sys.stderr)
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184 if next_wake:
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185 sleep_time = min(next_wake+EXTRA_WAKEUP, sleep_time)
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186
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187 if TESTING:
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188 print "Sleeping for %d" % sleep_time
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189 sleep_for(sleep_time)
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190
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191 if __name__ == '__main__':
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192 main()