36 lines
1.3 KiB
Scheme
36 lines
1.3 KiB
Scheme
(module monitor-server mzscheme
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(require (lib "etc.ss")
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"monitor-poke-web-server.ss"
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"monitor-emailer.ss"
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(lib "match.ss"))
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(provide monitor
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default-server-port
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default-poll-frequency-seconds
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default-server-response-timeout-seconds)
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(define default-server-port 80)
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(define default-poll-frequency-seconds 3600)
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(define default-server-response-timeout-seconds 75)
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; monitor : str str [nat] [num] [num] -> doesn't
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(define monitor
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(opt-lambda (email-address
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server-name
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[server-port default-server-port]
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[poll-frequency-seconds default-poll-frequency-seconds]
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[server-response-timeout-seconds default-server-response-timeout-seconds])
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(define result-channel (make-channel))
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(define (send-email msg)
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(send-email-alert email-address server-name server-port msg))
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(let check-server ()
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(poke-web-server result-channel server-name server-port server-response-timeout-seconds)
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(let ([result (channel-get result-channel)])
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(match result
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[`(ok) (void)]
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[else (send-email (result->message result))])
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(sleep poll-frequency-seconds)
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(check-server)))))) |