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unleash.unleash/src/lib/middleware/response-time-metrics.ts
Gastón Fournier 4e3ce8e0af
chore: GA responseTimeWithAppNames (#3178)
## About the changes
This makes response time with app names enabled for everyone but also
kept a way of turning it off (kill switch) in case it cause some issues
because of misconfigured app names
2023-02-22 09:10:06 +00:00

40 lines
1.3 KiB
TypeScript

import * as responseTime from 'response-time';
import EventEmitter from 'events';
import { REQUEST_TIME } from '../metric-events';
import { IFlagResolver } from '../types/experimental';
import { InstanceStatsService } from 'lib/services';
// eslint-disable-next-line @typescript-eslint/naming-convention
const _responseTime = responseTime.default;
const appNameReportingThreshold = 100;
export function responseTimeMetrics(
eventBus: EventEmitter,
flagResolver: IFlagResolver,
instanceStatsService: Pick<InstanceStatsService, 'getAppCountSnapshot'>,
): any {
return _responseTime((req, res, time) => {
const { statusCode } = res;
const pathname = req.route ? req.baseUrl + req.route.path : '(hidden)';
let appName;
if (
!flagResolver.isEnabled('responseTimeWithAppNameKillSwitch') &&
(instanceStatsService.getAppCountSnapshot('7d') ??
appNameReportingThreshold) < appNameReportingThreshold
) {
appName = req.headers['unleash-appname'] ?? req.query.appName;
}
const timingInfo = {
path: pathname,
method: req.method,
statusCode,
time,
appName,
};
eventBus.emit(REQUEST_TIME, timingInfo);
});
}