# Logger
HTTP request/response logger for Fiber

### Example
Import the middleware package that is part of the Fiber web framework
```go
import (
  "github.com/gofiber/fiber"
  "github.com/gofiber/fiber/middleware"
)
```

After you initiate your Fiber app, you can use the following possibilities:
```go
// Default Logger
app.Use(middleware.Logger())

// Pass a custom output
app.Use(middleware.Logger(os.Stdout))

// Pass a custom timeformat
app.Use(middleware.Logger("15:04:05"))

// Pass a custom format
app.Use(middleware.Logger("${time} ${method} ${path}"))

// Pass a custom timeformat + output + format
app.Use(middleware.Logger(os.Stdout, "15:04:05", "${time} ${method} ${path}"))

// Order does not matter
app.Use(middleware.Logger("${time} ${method} ${path}", os.Stdout, "15:04:05"))

// Pass a custom config
app.Use(middleware.Logger(middleware.LoggerConfig{
    Format:     "${method} ${path}",
    TimeFormat: "15:04:05",
    Output:     os.Stdout,
}))
```

### Signatures
```go
func Logger(Options ...interface{}) fiber.Handler {}
```

### Config
```go
type LoggerConfig struct {
  // Next defines a function to skip this middleware.
  Next func(ctx *fiber.Ctx) bool

  // Format defines the logging tags
  //
  // - time
  // - ip
  // - ips
  // - url
  // - host
  // - method
  // - path
  // - protocol
  // - route
  // - referer
  // - ua
  // - latency
  // - status
  // - body
  // - error
  // - bytesSent
  // - bytesReceived
  // - header:<key>
  // - query:<key>
  // - form:<key>
  // - cookie:<key>
  //
  // Optional. Default: ${time} ${method} ${path} - ${ip} - ${status} - ${latency}\n
  Format string

  // TimeFormat https://programming.guide/go/format-parse-string-time-date-example.html
  //
  // Optional. Default: 15:04:05
  TimeFormat string

  // Output is a writter where logs are written
  //
  // Default: os.Stderr
  Output io.Writer
}
```