explog (Zero Dependency)

Request and response logger middleware for node.js

API Default

 const Explog = require('explog')

 Explog({
  level: 'debug',
  transecLog: true,
  preFix: true,
  multiple: false,
  session: 0,
  console: true,
  writeFile: false
  appLog: {
    part: './logs'
  }
})

Create a logger middleware function using the given format and options.

options

• level level for write debug, info, warn, error and 'debug' is default.
• transecLog transections log have incoming and outgoing will display headers url method body queryString and response messages of express | true is default.
• preFix pre-fix of log have date hostname session. you can set false or some string | true is default.
• multiple display transections log to multiple line | false is default
• session session in transection log(incoming & outgoing) we have 4 option 0 mean don't create session, 1 mean random a-zA-Z0-9 22 digits 2 mean random only alphabet 22 digits and 3 mean only number 22 digits | 0 is default
• console enable or disable console | true is default
• writeFile write console to file | false is default
• appLog in this object for config path (string)

shall use preFix to hard custom session.

Examples

 const Explog = require('explog')

 const app = require('express')()

 app.use(Explog())

config

level Mean level for display log in debug, info, warn and error

  console.log('asd', {age: 25}) // debug
  console.info(2131) // debug, info
  console.warn(JSON.stringify({name: "foo"})) // debug, info, warn
  console.error(new Error('test')) // debug, info, warn, error

output with pre-fix

  2019-6-7 10:12:26|DESKTOP-TIK2PIC|debug| asd { naue: 'aaaa' }
  2019-6-7 10:12:26|DESKTOP-TIK2PIC|info| 2131
  2019-6-7 10:12:26|DESKTOP-TIK2PIC|warn| {"name":"foo"}
  2019-6-7 10:12:26|DESKTOP-TIK2PIC|error| Error: test
      at Object.<anonymous> (C:\CODE\github\enta1234\explog\test.js:26:15)
      at Module._compile (module.js:653:30)
      at Object.Module._extensions..js (module.js:664:10)
      at Module.load (module.js:566:32)
      at tryModuleLoad (module.js:506:12)
      at Function.Module._load (module.js:498:3)
      at Function.Module.runMain (module.js:694:10)
      at startup (bootstrap_node.js:204:16)
      at bootstrap_node.js:625:3

output without pre-fix

  asd { naue: 'aaaa' }
  2131
  {"name":"foo"}
  Error: test
      at Object.<anonymous> (C:\CODE\github\enta1234\explog\test.js:26:15)
      at Module._compile (module.js:653:30)
      at Object.Module._extensions..js (module.js:664:10)
      at Module.load (module.js:566:32)
      at tryModuleLoad (module.js:506:12)
      at Function.Module._load (module.js:498:3)
      at Function.Module.runMain (module.js:694:10)
      at startup (bootstrap_node.js:204:16)
      at bootstrap_node.js:625:3

transecLog When you use express this option will write transection log for you. You will get incoming and outgoing.

transecLog: true

  2019-6-7 01:12:03|DESKTOP-TIK2PIC|debug| incoming| __method=GET __url=/?aaa=xxx&xxx=www __headers={"content-type":"application/json","user-agent":"PostmanRuntime/7.13.0","accept":"*/*","cache-control":"no-cache","postman-token":"03190188-698c-468b-8155-23c89cb2d409","host":"localhost:3000","accept-encoding":"gzip, deflate","content-length":"18","connection":"keep-alive"} __body=null
  2019-6-7 01:12:03|DESKTOP-TIK2PIC|debug| outgoing| __status_code=201 __headers={"x-powered-by":"Express","content-type":"application/json; charset=utf-8","content-length":"15","etag":"W/\"f-oG2QlW7JG5oBrmRE9qdduyMrDm4\""} __body={"name":"asss"} __response_time=2005ms

preFix This will write 2019-6-7 01:12:03|DESKTOP-TIK2PIC|debug follow $date-time|$hostname If you need disable it you will set false but you can custom this with string.

preFix: false

  incoming| __method=GET __url=/?aaa=xxx&xxx=www __headers={"content-type":"application/json","user-agent":"PostmanRuntime/7.13.0","accept":"*/*","cache-control":"no-cache","postman-token":"03190188-698c-468b-8155-23c89cb2d409","host":"localhost:3000","accept-encoding":"gzip, deflate","content-length":"18","connection":"keep-alive"} __body=null

preFix: 'explog'

  explog|debug|incoming| __method=GET __url=/?aaa=xxx&xxx=www __headers={"content-type":"application/json","user-agent":"PostmanRuntime/7.13.0","accept":"*/*","cache-control":"no-cache","postman-token":"03190188-698c-468b-8155-23c89cb2d409","host":"localhost:3000","accept-encoding":"gzip, deflate","content-length":"18","connection":"keep-alive"} __body=null

TODO

• [x] custom pre-fix
• [x] config transection log to multiple line.
• [X] add session log to console.
• [x] write file.
• [x] config path log.
• [ ] config rotate file.

License

ISC