initial commit

src/core/server/app/middleware/logging.ts

@@ -0,0 +1,43 @@
+import { RequestHandler, ErrorRequestHandler } from 'express';
+import logger from '../../logger';
+import now from 'performance-now';
+
+export const access: RequestHandler = (req, res, next) => {
+  const startTime = now();
+  const end = res.end;
+  res.end = (chunk: any, encodingOrCb?: string | Function, cb?: Function) => {
+    // Compute the end time.
+    const responseTime = Math.round(now() - startTime);
+
+    // Get some extra goodies from the request.
+    const userAgent = req.get('User-Agent');
+
+    // Reattach the old end, and finish.
+    res.end = end;
+    if (typeof encodingOrCb === 'function') {
+      res.end(chunk, encodingOrCb);
+    } else {
+      res.end(chunk, encodingOrCb, cb);
+    }
+
+    // Log this out.
+    logger.info(
+      {
+        // traceID: req.id,
+        url: req.originalUrl || req.url,
+        method: req.method,
+        statusCode: res.statusCode,
+        userAgent,
+        responseTime,
+      },
+      'http request'
+    );
+  };
+
+  next();
+};
+
+export const error: ErrorRequestHandler = (err, req, res, next) => {
+  logger.error({ err }, 'http error');
+  next(err);
+};