Initial commit mit MkDocs-Dokumentation

backend/src/middleware/requestLogger.js

@@ -0,0 +1,53 @@
+const { randomUUID } = require('crypto');
+const logger = require('../services/logger').child('HTTP');
+
+function truncate(value, maxLen = 1500) {
+  if (value === undefined) {
+    return undefined;
+  }
+
+  let str;
+  if (typeof value === 'string') {
+    str = value;
+  } else {
+    try {
+      str = JSON.stringify(value);
+    } catch (error) {
+      str = '[unserializable-body]';
+    }
+  }
+  if (str.length <= maxLen) {
+    return str;
+  }
+
+  return `${str.slice(0, maxLen)}...[truncated ${str.length - maxLen} chars]`;
+}
+
+module.exports = function requestLogger(req, res, next) {
+  const reqId = randomUUID();
+  const startedAt = Date.now();
+
+  req.reqId = reqId;
+
+  logger.info('request:start', {
+    reqId,
+    method: req.method,
+    url: req.originalUrl,
+    ip: req.ip,
+    query: req.query,
+    body: truncate(req.body)
+  });
+
+  res.on('close', () => {
+    if (!res.writableEnded) {
+      logger.warn('request:aborted', {
+        reqId,
+        method: req.method,
+        url: req.originalUrl,
+        durationMs: Date.now() - startedAt
+      });
+    }
+  });
+
+  next();
+};