27 lines
No EOL
879 B
JavaScript
27 lines
No EOL
879 B
JavaScript
const state = require('./state')
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const logger = require('../logger')
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const CLOCK_SKEW = 60 * 1000
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const REQUEST_TTL = 3 * 60 * 1000
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const THROTTLE_CLOCK_SKEW = 60 * 1000
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function filterOldRequests (req, res, next) {
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const deviceTime = req.deviceTime
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const deviceId = req.deviceId
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const timestamp = Date.now()
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const delta = timestamp - Date.parse(deviceTime)
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const shouldTrigger = !state.canLogClockSkewMap[deviceId] ||
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timestamp - state.canLogClockSkewMap[deviceId] >= THROTTLE_CLOCK_SKEW
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if (delta > CLOCK_SKEW && shouldTrigger) {
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state.canLogClockSkewMap[deviceId] = timestamp
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logger.error('Clock skew with lamassu-machine[%s] too high [%ss], adjust lamassu-machine clock',
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req.deviceName, (delta / 1000).toFixed(2))
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}
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if (delta > REQUEST_TTL) return res.status(408).json({ error: 'stale' })
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next()
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}
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module.exports = filterOldRequests |