fastify / one-line-logger

Helps you format fastify's log into a nice one line message

@fastify/one-line-logger

@fastify/one-line-logger helps you format fastify's log into a nice one line message:

YYYY-MM-dd HH:mm:ss.SSSTZ - <level> - <method> <route path> - <message>

A standard incoming request log line like:

{"level": 30,"time": 1660151282194,"pid": 1557,"hostname": "foo","reqId": "req-1","req": {"method": "GET","url": "/path","hostname": "localhost:8080","remoteAddress": "127.0.0.1"},"msg": "incoming request"}

Will format to:

2022-08-11 01:08:02.194+0100 - info - GET / - incoming request

Install

npm i @fastify/one-line-logger

Getting started

const server = fastify({
  logger: {
    transport: {
      target: "@fastify/one-line-logger",
    },
  },
});

Custom levels

Custom levels could be used by passing it into logger opts

const server = fastify({
  logger: {
    transport: {
      target: "@fastify/one-line-logger",
    },
    customLevels: {
      foo: 35,
      bar: 45,
    },
  },
});

server.get("/", (request, reply) => {
  request.log.info("time to foobar");
  request.log.foo("FOO!");
  request.log.bar("BAR!");
  reply.send({ foobar: true });
});

Custom level colors

Custom levels colors could be used by passing it into logger opts. They can also overwrite the default level's colors. Check all the supported colors here.

const server = fastify({
  logger: {
    transport: {
      target: "@fastify/one-line-logger",
      colors: {
        35: "bgYellow",
        45: "magenta",
        60: "bgRedBright" // overwriting the `fatal` log color
      }
    },
    customLevels: {
      foo: 35,
      bar: 45,
    },
  },
});

server.get("/", (request, reply) => {
  request.log.fatal("An error occured");
  request.log.foo("FOO!");
  request.log.bar("BAR!");
  reply.send({ foobar: true });
});

License

MIT License