feat: altera nivel de log no request

change-log-level-header/index.js

@@ -0,0 +1,37 @@
+const Fastify = require('fastify');
+
+(async () => {
+  const logLevels = [
+    'debug',
+    'error',
+    'fatal',
+    'info',
+    'silent',
+    'trace',
+    'warn',
+  ];
+
+  const app = Fastify({
+    logger: {
+      level: 'debug',
+    },
+    disableRequestLogging: true,
+  });
+
+  app.addHook('onRequest', async (req, reply) => {
+    const logLevel = req.headers['x-log-level'];
+
+    if (logLevel && logLevels.includes(logLevel.toLowerCase())) {
+      req.log.level = logLevel.toLowerCase();
+    }
+  });
+
+  app.get('/', async (req, res) => {
+    req.log.info('should when log level is INFO');
+    return { hello: 'world' };
+  });
+
+  await app.listen({ port: 3000 });
+})();
+
+// curl -H 'x-log-level: error' http://localhost:3000