Method getRequestHandler

packages/next/src/server/dev/next-dev-server.ts:493–560

()

  }

  public getRequestHandler(): NodeRequestHandler {
    const handler = super.getRequestHandler()

    return (req, res, parsedUrl) => {
      const request = this.normalizeReq(req)
      const response = this.normalizeRes(res)
      const loggingConfig = this.nextConfig.logging

      if (loggingConfig !== false) {
        // The closure variable is not used here because the request handler may be invoked twice for one request when middleware is added in the application.
        // By setting the start time we can ensure that the middleware timing is correctly included.
        if (!getRequestMeta(req, 'devRequestTimingStart')) {
          const requestStart = process.hrtime.bigint()
          addRequestMeta(req, 'devRequestTimingStart', requestStart)
        }
        const isMiddlewareRequest =
          getRequestMeta(req, 'middlewareInvoke') ?? false

        if (!isMiddlewareRequest) {
          response.originalResponse.once('close', () => {
            // NOTE: The route match is only attached to the request's meta data
            // after the request handler is created, so we need to check it in the
            // close handler and not before.
            const routeMatch = getRequestMeta(req).match

            if (!routeMatch) {
              return
            }

            // The closure variable is not used here because the request handler may be invoked twice for one request when middleware is added in the application.
            // By setting the start time we can ensure that the middleware timing is correctly included.
            const requestStart = getRequestMeta(req, 'devRequestTimingStart')
            if (!requestStart) {
              return
            }
            const requestEnd = process.hrtime.bigint()
            logRequests(
              request,
              response,
              loggingConfig,
              requestStart,
              requestEnd,
              getRequestMeta(req, 'devRequestTimingMiddlewareStart'),
              getRequestMeta(req, 'devRequestTimingMiddlewareEnd'),
              getRequestMeta(req, 'devRequestTimingInternalsEnd'),
              getRequestMeta(req, 'devGenerateStaticParamsDuration')
            )

            // Create trace span for render phase
            const devRequestTimingInternalsEnd = getRequestMeta(
              req,
              'devRequestTimingInternalsEnd'
            )
            if (devRequestTimingInternalsEnd) {
              this.startServerSpan.manualTraceChild(
                'render-path',
                hrtimeToEpochNanoseconds(devRequestTimingInternalsEnd),
                hrtimeToEpochNanoseconds(requestEnd),