node.js - 有没有办法在 morgan 中记录响应正文？

Question

我想将响应正文记录在我的日志文件中

我尝试过 morgan-body 但我想将响应记录在文件中而不是控制台中

以下代码将记录请求正文，那么有没有办法也记录响应？

morgan.token('body', function (req, res) { return JSON.stringify(req.body) });

app.use(morgan(':method :url :status :response-time ms - :res[content-length] :body - :req[content-length]', { 
  stream: logger.successLogStream,
  skip: function (req, res) { return res.statusCode >= 400 }
 }));

 app.use(morgan(':method :url :status :response-time ms - :res[content-length] :body - :req[content-length]', { 
  stream: logger.errorLogStream,
  skip: function (req, res) { return res.statusCode < 400 }
 }));

例如，我想记录以下错误消息

return res.status(400).send({ "message": "Campaign id is not defined" })

Answer 1

你可以使用这个

const app = express()
const originalSend = app.response.send

app.response.send = function sendOverWrite(body) {
  originalSend.call(this, body)
  this.__custombody__ = body
}

morgan.token('res-body', (_req, res) =>
  JSON.stringify(res.__custombody__),
)

...

app.use(express.json())
app.use(express.urlencoded({ extended: true }))
app.use(morgan(loggerFormat, { stream: logStream }))
app.use(...routers)