Mercurial > templog

annotate server/ts.py @ 346:d6219df77c41

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main.c: - get rid of some debugging - separate uart_enabled flag ts.py: - remember next wake time, not the interval log.py: - comments for sqlite templog.py - use cgi
author Matt Johnston <matt@ucc.asn.au>
date Sat, 23 Jun 2012 22:10:23 +0800
parents ba9bfcc9c526
children 26c8ab2ba3f1
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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1 #!/usr/bin/env python2.7
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2
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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 import zlib
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22 import urllib
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23 import urllib2
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24
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25 import config
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26
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27 from utils import monotonic_time, retry, readline, crc16
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28
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29 lightblue = None
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30 try:
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31 import lightblue
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32 except ImportError:
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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 if lightblue:
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37 s = lightblue.socket()
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38 s.connect((addr, 1))
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39 s.settimeout(3)
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40 else:
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41 s = bluetooth.BluetoothSocket( bluetooth.RFCOMM )
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42 s.connect((addr, 1))
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43
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44 s.setblocking(False)
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45
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46 return s
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47
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48
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49 @retry()
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50 def fetch(sock):
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51 print "fetch"
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52 sock.send("fetch\n")
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53
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54 crc = 0
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55
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56 lines = []
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57 l = readline(sock)
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58 if l != 'START\n':
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59 print>>sys.stderr, "Bad expected START line '%s'\n" % l.rstrip('\n')
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60 return None
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61 crc = crc16(l, crc)
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62
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63 while True:
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64 l = readline(sock)
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65
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66 crc = crc16(l, crc)
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67
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68 if l == 'END\n':
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69 break
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70
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71 lines.append(l.rstrip('\n'))
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72
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73 print lines
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74
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75 l = readline(sock)
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76 recv_crc = None
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77 try:
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78 k, v = l.rstrip('\n').split('=')
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79 print k,v
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80 if k == 'CRC':
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81 recv_crc = int(v)
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82 if recv_crc < 0 or recv_crc > 0xffff:
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83 recv_crc = None
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84 except ValueError:
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85 pass
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86
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87 if recv_crc is None:
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88 print>>sys.stderr, "Bad expected CRC line '%s'\n" % l.rstrip('\n')
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89 return None
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90
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91 if recv_crc != crc:
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92 print>>sys.stderr, "Bad CRC: calculated 0x%x vs received 0x%x\n" % (crc, recv_crc)
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93 return None
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94
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95 return lines
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96
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97 @retry()
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98 def turn_off(sock):
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99 if TESTING:
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100 return None
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101 sock.send("btoff\n");
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102 # read newline
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103 l = readline(sock)
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104 if not l:
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105 print>>sys.stderr, "Bad response to btoff\n"
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106 return None
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107
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108 off, next_wake = l.rstrip().split(':')
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109 if off != 'Off':
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110 print>>sys.stderr, "Bad response to btoff '%s'\n" % l
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111
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112 return int(next_wake)
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113
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114 @retry()
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115 def clear_meas(sock):
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116 sock.send("clear\n");
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117 l = readline(sock)
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118 if l and l.rstrip() == 'cleared':
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119 return True
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120
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121 print>>sys.stderr, "Bad response to clear %s\n" % str(l)
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122 return False
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123
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124 def send_results(lines):
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125 enc_lines = binascii.b2a_base64(zlib.compress('\n'.join(lines)))
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126 mac = hmac.new(config.HMAC_KEY, enc_lines).hexdigest()
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127
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128 url_data = urllib.urlencode( {'lines': enc_lines, 'hmac': mac} )
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129 con = urllib2.urlopen(config.UPDATE_URL, url_data)
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130 result = con.read(100)
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131 if result == 'OK':
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132 return True
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133 else:
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134 print>>sys.stderr, "Bad result '%s'" % result
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135 return False
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136
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137 def do_comms(sock):
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138 print "do_comms"
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139 d = None
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140 # serial could be unreliable, try a few times
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141 for i in range(FETCH_TRIES):
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142 d = fetch(sock)
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143 if d:
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144 break
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145 time.sleep(1)
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146 if not d:
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147 return
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148
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149 res = send_results(d)
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150 if not res:
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151 return
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152
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153 clear_meas(sock)
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154
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155 next_wake = turn_off(sock)
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156 sock.close()
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157 return next_wake
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158
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159 testcount = 0
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160
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161 def sleep_for(secs):
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162 until = monotonic_time() + secs
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163 while True:
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164 length = until - monotonic_time()
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165 if length <= 0:
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166 return
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167 time.sleep(length)
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168
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169 def main():
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170 next_wake_time = 0
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171
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172 while True:
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173 sock = None
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174 try:
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175 sock = get_socket(BTADDR)
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176 except Exception, e:
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177 print>>sys.stderr, "Error connecting:"
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178 traceback.print_exc(file=sys.stderr)
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179 sleep_time = SLEEP_TIME
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180 if sock:
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181 next_wake = None
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182 try:
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183 next_wake_interval = do_comms(sock)
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184 next_wake_time = time.now() + next_wake_interval
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185 except Exception, e:
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186 print>>sys.stderr, "Error in do_comms:"
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187 traceback.print_exc(file=sys.stderr)
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188 if next_wake_time > time.now():
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189 sleep_time = min(next_wake_time - time.now() - EXTRA_WAKEUP, sleep_time)
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190
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191 if TESTING:
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192 print "Sleeping for %d" % sleep_time
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193 sleep_for(sleep_time)
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194
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195 if __name__ == '__main__':
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196 main()