Azure AppInsights with Nodejs adding operation id to response

Problem: I needed to add an additional response header to my requests to aid in tracking errors.

Here is my solution: Add middleware that will add the AppInsights Operation ID to the response. The Operation ID is unique to each request so searching for it is simple.

import { Request, Response, NextFunction } from 'express';
import appInsights from '../../lib/appInsights';

export default (req: Request, res: Response, next: NextFunction) => {
    const { operation } = appInsights.getCorrelationContext();

    res.setHeader('X-Operation-ID', operation.id);

    next();
};

Note

import appInsights from '../../lib/appInsights';

AppInsights is initiated in an additional module that configures and filters requests E.g. Stops requests to the health check endpoints being logged

Now I can view requests in the browser, look for request response headers and specifically X-Operation-ID. This will give me an ID string that can be queried in Azure AppInsights logs.

For example: Query the ‘exceptions’ table

exceptions
| where operation_Id  == << X Operation ID>>