Eric Mc Sween
166211b278
When the environment variable STACKDRIVER_LOGGING is set to true, send request logs in a format that Stackdriver knows how to interpret. Also, set the log level accordint to the status code. 4xx responses are logged as warnings and 5xx responses are logged as errors.
57 lines
1.9 KiB
CoffeeScript
57 lines
1.9 KiB
CoffeeScript
os = require("os")
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yn = require("yn")
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STACKDRIVER_LOGGING = yn(process.env['STACKDRIVER_LOGGING'])
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module.exports.monitor = (logger) ->
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return (req, res, next) ->
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Metrics = require("./metrics")
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startTime = process.hrtime()
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end = res.end
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res.end = () ->
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end.apply(this, arguments)
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responseTime = process.hrtime(startTime)
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responseTimeMs = Math.round(responseTime[0] * 1000 + responseTime[1] / 1000)
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if req.route?.path?
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routePath = req.route.path.toString().replace(/\//g, '_').replace(/\:/g, '').slice(1)
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key = "http-requests.#{routePath}.#{req.method}.#{res.statusCode}"
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Metrics.timing(key, responseTimeMs)
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remoteIp = req.ip || req.socket?.socket?.remoteAddress || req.socket?.remoteAddress
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reqUrl = req.originalUrl || req.url
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referrer = req.headers['referer'] || req.headers['referrer']
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if STACKDRIVER_LOGGING
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info =
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httpRequest:
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requestMethod: req.method
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requestUrl: reqUrl
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requestSize: req.headers["content-length"]
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status: res.statusCode
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responseSize: res._headers?["content-length"]
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userAgent: req.headers["user-agent"]
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remoteIp: remoteIp
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referer: referrer
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latency:
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seconds: responseTime[0]
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nanos: responseTime[1]
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protocol: req.protocol
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else
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info =
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req:
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url: reqUrl
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method: req.method
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referrer: referrer
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"remote-addr": remoteIp
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"user-agent": req.headers["user-agent"]
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"content-length": req.headers["content-length"]
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res:
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"content-length": res._headers?["content-length"]
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statusCode: res.statusCode
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"response-time": responseTimeMs
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if res.statusCode >= 500
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logger.error(info, "%s %s", req.method, reqUrl)
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else if res.statusCode >= 400 and res.statusCode < 500
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logger.warn(info, "%s %s", req.method, reqUrl)
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else
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logger.info(info, "%s %s", req.method, reqUrl)
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next()
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