Gin outputs to a file

Question

I'm using Gin to make REST API server and Gin shows its output on a console like this: Gin console example

I'd like to make gin's output to a file instead of console.

What I've found is below code from Gin/mode.go

// DefaultWriter is the default io.Writer used the Gin for debug output and
// middleware output like Logger() or Recovery().
// Note that both Logger and Recovery provides custom ways to configure their
// output io.Writer.
// To support coloring in Windows use:
//      import "github.com/mattn/go-colorable"
//      gin.DefaultWriter = colorable.NewColorableStdout()
var DefaultWriter io.Writer = os.Stdout
var DefaultErrorWriter io.Writer = os.Stderr

Looks like I can change DefaultWriter and DefaultErrorWriter's behavior by setting like

gin.DefaultWriter = something

on my code.

But I have no idea how to write that 'something' code; it must be a function which writes to a file but have no idea how/where to start.

So, my questions are:

1. Am I heading to the right direction?
2. How to write that 'something' function? It would be very helpful if you can provide an example.

Thank you.

Answer 1

You can use os package to create a file.

file, fileErr := os.Create("file")
if fileErr != nil {
    fmt.Println(fileErr)
    return
}
gin.DefaultWriter = file

This should create a file and start writing to it.