How can I implement logging in my Go application using JSON?

How can I implement logging in my Go application using JSON?

You can use the 'log' package along with a JSON encoder to format your logs. Would you like a code example?

Yes, please provide a code example.

Here's a simple example:

package main

import (
    "encoding/json"
    "log"
    "os"
)

type LogMessage struct {
    Level   string `json:"level"`
    Message string `json:"message"`
}

func main() {
    file, err := os.OpenFile("app.log", os.O_CREATE|os.O_WRONLY|os.O_APPEND, 0666)
    if err != nil {
        log.Fatal(err)
    }
    logger := log.New(file, "", 0)

    logMsg := LogMessage{Level: "INFO", Message: "Application started"}
    jsonLog, _ := json.Marshal(logMsg)
    logger.Println(string(jsonLog))
}

This will log messages in JSON format to a file.

What if I want to log errors in a different format?

You can create a separate struct for error logs or add a field to differentiate between log levels. Would you like to see that?