-
-
Notifications
You must be signed in to change notification settings - Fork 1.6k
Commit
This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository.
🚀 Add Logger interface and fiberlog (#2499)
* add log for fiber * replace log in fiber * add Log use to adapt for log libraries * Update app.go Co-authored-by: Tomás Warynyca <[email protected]> * wip: add log docs * add WithLogger use to print key and value * remove CtxLogger and add WithContext use to bind Context * fix errcheck * fix errcheck * update log.md --------- Co-authored-by: Tomás Warynyca <[email protected]>
- Loading branch information
1 parent
5967d36
commit fefc533
Showing
20 changed files
with
865 additions
and
42 deletions.
There are no files selected for viewing
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,156 @@ | ||
| --- | ||
| id: log | ||
| title: Log | ||
| description: Fiber's built-in log package | ||
| sidebar_position: 8 | ||
| --- | ||
| ## Log | ||
|
|
||
| We can use logs to observe program behavior, diagnose problems, or configure corresponding alarms. | ||
| And defining a well structured log can improve search efficiency and facilitate handling of problems. | ||
|
|
||
| Fiber provides a default way to print logs in the standard output. | ||
| It also provides several global functions, such as `log.Info`, `log.Errorf`, `log.Warnw`, etc. | ||
|
|
||
| ## Log levels | ||
|
|
||
| ```go | ||
| const ( | ||
| LevelTrace Level = iota | ||
| LevelDebug | ||
| LevelInfo | ||
| LevelWarn | ||
| LevelError | ||
| LevelFatal | ||
| LevelPanic | ||
| ) | ||
| ``` | ||
|
|
||
| ## Custom log | ||
|
|
||
| Fiber provides the `AllLogger` interface for adapting the various log libraries. | ||
|
|
||
| ```go | ||
| type CommonLogger interface { | ||
| Logger | ||
| FormatLogger | ||
| WithLogger | ||
| } | ||
|
|
||
| type AllLogger interface { | ||
| CommonLogger | ||
| ControlLogger | ||
| WithLogger | ||
| } | ||
| ``` | ||
|
|
||
| ## Print log | ||
| Note: The method of calling the Fatal level will interrupt the program running after printing the log, please use it with caution. | ||
| Directly print logs of different levels, which will be entered into messageKey, the default is msg. | ||
|
|
||
| ```go | ||
| log.Info("Hello, World!") | ||
| log.Debug("Are you OK?") | ||
| log.Info("42 is the answer to life, the universe, and everything") | ||
| log.Warn("We are under attack!") | ||
| log.Error("Houston, we have a problem.") | ||
| log.Fatal("So Long, and Thanks for All the Fislog.") | ||
| log.Panic("The system is down.") | ||
| ``` | ||
| Format and print logs of different levels, all methods end with f | ||
|
|
||
| ```go | ||
| log.Debugf("Hello %s", "boy") | ||
| log.Infof("%d is the answer to life, the universe, and everything", 233) | ||
| log.Warnf("We are under attack %s!", "boss") | ||
| log.Errorf("%s, we have a problem.", "Master Shifu") | ||
| log.Fatalf("So Long, and Thanks for All the %s.", "banana") | ||
| ``` | ||
|
|
||
| Print a message with the key and value, or `KEYVALS UNPAIRED` if the key and value are not a pair. | ||
|
|
||
| ```go | ||
| log.Debugw("", "Hello", "boy") | ||
| log.Infow("", "number", 233) | ||
| log.Warnw("", "job", "boss") | ||
| log.Errorw("", "name", "Master Shifu") | ||
| log.Fatalw("", "fruit", "banana") | ||
| ``` | ||
|
|
||
| ## Global log | ||
| If you are in a project and just want to use a simple log function that can be printed at any time in the global, we provide a global log. | ||
|
|
||
| ```go | ||
| import "github.com/gofiber/fiber/v2/log" | ||
|
|
||
| log.Info("info") | ||
| log.Warn("warn") | ||
| ``` | ||
|
|
||
| The above is using the default `log.DefaultLogger` standard output. | ||
| You can also find an already implemented adaptation under contrib, or use your own implemented Logger and use `log.SetLogger` to set the global log logger. | ||
|
|
||
| ```go | ||
| import ( | ||
| "log" | ||
| fiberlog "github.com/gofiber/fiber/v2/log" | ||
| ) | ||
|
|
||
| var _ log.AllLogger = (*customLogger)(nil) | ||
|
|
||
| type customLogger struct { | ||
| stdlog *log.Logger | ||
| } | ||
|
|
||
| // ... | ||
| // inject your custom logger | ||
| fiberlog.SetLogger(customLogger) | ||
| ``` | ||
|
|
||
| ## Set Level | ||
| `log.SetLevel` sets the level of logs below which logs will not be output. | ||
| The default logger is LevelTrace. | ||
|
|
||
| Note that this method is not **concurrent-safe**. | ||
|
|
||
| ```go | ||
| import "github.com/gofiber/fiber/v2/log" | ||
|
|
||
| log.SetLevel(log.LevelInfo) | ||
| ``` | ||
| ## Set output | ||
|
|
||
| `log.SetOutput` sets the output destination of the logger. The default logger types the log in the console. | ||
|
|
||
| ```go | ||
| var logger AllLogger = &defaultLogger{ | ||
| stdlog: log.New(os.Stderr, "", log.LstdFlags|log.Lshortfile|log.Lmicroseconds), | ||
| depth: 4, | ||
| } | ||
| ``` | ||
|
|
||
| Set the output destination to the file. | ||
|
|
||
| ```go | ||
| // Output to ./test.log file | ||
| f, err := os.OpenFile("test.log", os.O_CREATE|os.O_WRONLY|os.O_APPEND, 0666) | ||
| if err != nil { | ||
| return | ||
| } | ||
| log.SetOutput(f) | ||
| ``` | ||
| Set the output destination to the console and file. | ||
|
|
||
| ```go | ||
| // Output to ./test.log file | ||
| file, _ := os.OpenFile("test.log", os.O_CREATE|os.O_WRONLY|os.O_APPEND, 0666) | ||
| iw := io.MultiWriter(os.Stdout, file) | ||
| log.SetOutput(iw) | ||
| ``` | ||
| ## Bind context | ||
| Set the context, using the following method will return a `CommonLogger` instance bound to the specified context | ||
| ```go | ||
| commonLogger := log.WithContext(ctx) | ||
| commonLogger.Info("info") | ||
| ``` | ||
|
|
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Oops, something went wrong.
fefc533There was a problem hiding this comment.
Choose a reason for hiding this comment
The reason will be displayed to describe this comment to others. Learn more.
Possible performance regression was detected for benchmark.
Benchmark result of this commit is worse than the previous benchmark result exceeding threshold
2.Benchmark_TrimLeft/fiber12.49ns/op 0 B/op 0 allocs/op3.632ns/op 0 B/op 0 allocs/op3.44This comment was automatically generated by workflow using github-action-benchmark.