76 lines
1.8 KiB
JavaScript
76 lines
1.8 KiB
JavaScript
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var log = require('bole')('budo')
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var onResHeaders = require('on-headers')
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var onResFinished = require('on-finished')
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module.exports = simpleHttpLoggerMiddleware
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function simpleHttpLoggerMiddleware (opts) {
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opts = opts || {}
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var httpLogger = function simpleHttpLogger (req, res, next) {
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if (httpLogger.ignores.indexOf(req.url) >= 0) return next()
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if (!req.url) return next()
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// request data
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req._startAt = undefined
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// response data
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res._startAt = undefined
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// record request start
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recordStartTime.call(req)
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var byteLength = 0
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var logRequest = function () {
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if (!req._startAt || !res._startAt) {
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// missing request and/or response start time
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return
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}
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// calculate diff
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var ms = (res._startAt[0] - req._startAt[0]) * 1000 +
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(res._startAt[1] - req._startAt[1]) * 1e-6
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log.info({
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elapsed: ms,
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contentLength: byteLength,
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method: (req.method || 'GET').toUpperCase(),
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url: req.url,
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statusCode: res.statusCode,
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type: httpLogger.type === 'static' ? undefined : httpLogger.type,
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colors: {
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elapsed: ms > 1000 ? 'yellow' : 'dim'
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}
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})
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}
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var isAlreadyLogging = res._simpleHttpLogger
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res._simpleHttpLogger = true
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if (!isAlreadyLogging) {
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// record response start
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onResHeaders(res, recordStartTime)
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// log when response finished
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onResFinished(res, logRequest)
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var writeFn = res.write
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// catch content-length of payload
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res.write = function (payload) {
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if (payload) byteLength += payload.length
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return writeFn.apply(res, arguments)
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}
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}
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next()
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}
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httpLogger.ignores = [].concat(opts.ignores).filter(Boolean)
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httpLogger.type = 'static'
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return httpLogger
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}
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function recordStartTime () {
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this._startAt = process.hrtime()
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}
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