英文:
How do I disable field name in logrus while logging to file
问题
我正在使用golang中的logrus将日志记录到文件中。现在，logrus正在使用字段名记录到文件中。
例如
time="26-03-2017 03:37:58" level=error msg="Not fatal. An error. Won't stop execution"
如何删除字段名，使得日志条目变为
ERRO 26-03-2017 03:37:58 Not fatal. An error. Won't stop execution，
就像在stderr的情况下一样？
英文:
I am using logrus in golang to log to file. Right now, logrus is logging to file with field name.
ie
time="26-03-2017 03:37:58" level=error msg="Not fatal. An error. Won't stop execution"
How do I remove the field names so that the log entry becomes
ERRO 26-03-2017 03:37:58 Not fatal. An error. Won't stop execution
like how it behaves in case of stderr?
答案1
得分: 3
以下是您请求的内容的翻译：
这是如何获取您请求的内容的方法：
package main
import (
log "github.com/sirupsen/logrus"
"fmt"
)
type PlainFormatter struct {
TimestampFormat string
LevelDesc []string
}
func (f *PlainFormatter) Format(entry *log.Entry) ([]byte, error) {
timestamp := fmt.Sprintf(entry.Time.Format(f.TimestampFormat))
return []byte(fmt.Sprintf("%s %s %s\n", f.LevelDesc[entry.Level], timestamp, entry.Message)), nil
}
func main() {
plainFormatter := new(PlainFormatter)
plainFormatter.TimestampFormat = "2006-01-02 15:04:05"
plainFormatter.LevelDesc = []string{"PANC", "FATL", "ERRO", "WARN", "INFO", "DEBG"}
log.SetFormatter(plainFormatter)
log.Errorln("Not fatal. An error. Won't stop execution")
log.Infoln("Just some info")
}
- 创建 PlainFormatter 结构体（包含时间戳格式和级别字段）
- 创建 Format 函数/方法（其中您的结构体是接收者）
- 设置 logrus 使用您的自定义格式化程序
输出：
ERRO 2017-07-01 18:22:21 Not fatal. An error. Won't stop execution
INFO 2017-07-01 18:22:21 Just some info
在我的书《在 Go 中学习函数式编程》中，您可以在“使用装饰添加功能”章节中看到如何操作应用程序日志记录器的更实际的示例。
英文:
Here's how to get what you requested:
package main
import (
log "github.com/sirupsen/logrus"
"fmt"
)
type PlainFormatter struct {
TimestampFormat string
LevelDesc []string
}
func (f *PlainFormatter) Format(entry *log.Entry) ([]byte, error) {
timestamp := fmt.Sprintf(entry.Time.Format(f.TimestampFormat))
return []byte(fmt.Sprintf("%s %s %s\n", f.LevelDesc[entry.Level], timestamp, entry.Message)), nil
}
func main() {
plainFormatter := new(PlainFormatter)
plainFormatter.TimestampFormat = "2006-01-02 15:04:05"
plainFormatter.LevelDesc = []string{"PANC", "FATL", "ERRO", "WARN", "INFO", "DEBG"}
log.SetFormatter(plainFormatter)
log.Errorln("Not fatal. An error. Won't stop execution")
log.Infoln("Just some info")
}
- Create the PlainFormatter struct (with timestamp format and level fields)
- Create a Format function/method (where your struct is the receiver)
- Set logrus to use your custom formatter
Output:
ERRO 2017-07-01 18:22:21 Not fatal. An error. Won't stop execution
INFO 2017-07-01 18:22:21 Just some info
In my book Learn Functional Programming in Go book you can see a more practical example of how you can manipulate your application logger in Adding Functionality with Decoration chapter.
答案2
得分: 1
你需要编写一个自定义格式化程序，只输出你想要看到的字段。
在 logrus readme 中有一个示例：
type MyJSONFormatter struct {
}
log.SetFormatter(new(MyJSONFormatter))
func (f *MyJSONFormatter) Format(entry *Entry) ([]byte, error) {
// 注意，这里不包括时间、级别和消息，它们在 Entry 上是可用的。
// 请查阅 `godoc` 获取有关这些字段的信息，或阅读官方记录器的源代码。
serialized, err := json.Marshal(entry.Data)
if err != nil {
return nil, fmt.Errorf("Failed to marshal fields to JSON, %v", err)
}
return append(serialized, '\n'), nil
}
英文:
You need to write a custom formatter that emits only the fields you want to see.
There is an example in the logrus readme:
<!-- language: go -->
type MyJSONFormatter struct {
}
log.SetFormatter(new(MyJSONFormatter))
func (f *MyJSONFormatter) Format(entry *Entry) ([]byte, error) {
// Note this doesn't include Time, Level and Message which are available on
// the Entry. Consult `godoc` on information about those fields or read the
// source of the official loggers.
serialized, err := json.Marshal(entry.Data)
if err != nil {
return nil, fmt.Errorf("Failed to marshal fields to JSON, %v", err)
}
return append(serialized, '\n'), nil
}
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