backend logging

backend/middleware/apiLogger.js

@@ -0,0 +1,53 @@
+const logger = require('../utils/logger');
+
+const apiLogger = (req, res, next) => {
+  const startTime = Date.now();
+  const reqLogger = logger.withRequestId(req.id);
+
+  const requestData = {
+    method: req.method,
+    url: req.url,
+    userAgent: req.get('User-Agent'),
+    ip: req.ip,
+    userId: req.user?.id || 'anonymous',
+    body: logger.sanitize(req.body),
+    params: req.params,
+    query: req.query,
+    headers: {
+      'content-type': req.get('Content-Type'),
+      'content-length': req.get('Content-Length'),
+      'referer': req.get('Referer'),
+    }
+  };
+
+  reqLogger.info('API Request', requestData);
+
+  const originalSend = res.send;
+  res.send = function(body) {
+    const endTime = Date.now();
+    const responseTime = endTime - startTime;
+
+    const responseData = {
+      statusCode: res.statusCode,
+      responseTime: `${responseTime}ms`,
+      contentLength: res.get('Content-Length') || (body ? body.length : 0),
+      method: req.method,
+      url: req.url,
+      userId: req.user?.id || 'anonymous'
+    };
+
+    if (res.statusCode >= 400 && res.statusCode < 500) {
+      reqLogger.warn('API Response - Client Error', responseData);
+    } else if (res.statusCode >= 500) {
+      reqLogger.error('API Response - Server Error', responseData);
+    } else {
+      reqLogger.info('API Response - Success', responseData);
+    }
+
+    return originalSend.call(this, body);
+  };
+
+  next();
+};
+
+module.exports = apiLogger;