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src/api/middleware/logger.js

@@ -1,7 +1,29 @@
 import chalk from 'chalk';
 
+const BINARY_PREVIEW_BYTES = 16;
+
+function summarizeBuffer(buf) {
+    const head = buf.subarray(0, BINARY_PREVIEW_BYTES);
+    const hex = [...head].map((b) => b.toString(16).padStart(2, '0')).join(' ');
+    return {
+        type: 'Buffer',
+        length: buf.length,
+        headHex: hex,
+    };
+}
+
 function safeJson(value) {
     try {
+        if (Buffer.isBuffer(value)) {
+            return JSON.stringify(summarizeBuffer(value), null, 2);
+        }
+        if (
+            Array.isArray(value) &&
+            value.length > 64 &&
+            value.every((n) => Number.isInteger(n) && n >= 0 && n <= 255)
+        ) {
+            return JSON.stringify(summarizeBuffer(Buffer.from(value)), null, 2);
+        }
         return JSON.stringify(value, null, 2);
     } catch {
         return String(value);
@@ -46,6 +68,7 @@ export const loggerMiddleware = (req, res, next) => {
         console.log(`${method} ${url} ${status} ${chalk.gray(`(${duration}ms)`)}`);
         console.log(chalk.gray('  params:'), safeJson(req.params ?? {}));
         console.log(chalk.gray('  query:'), safeJson(req.query ?? {}));
+        console.log(chalk.gray('  content-type:'), req.headers['content-type'] ?? '(none)');
         console.log(chalk.gray('  body:'), safeJson(req.body ?? {}));
         console.log(chalk.gray('  response:'), safeJson(getBody()));
     });