Internationalization in golang function error handling
May 05, 2024 am 09:24 AM
GoLang functions can perform error internationalization through the Wrapf and Errorf functions in the errors package, thereby creating localized error messages and appending them to other errors to form higher-level errors. By using the Wrapf function, you can internationalize low-level errors and append a custom message, such as "Error opening file %s".
Internationalization in GoLang function error handling
GoLang provides a powerful error handling mechanism, but by default The error message is in English. This can cause problems for multilingual applications. This article will describe how to use the Wrapf and Errorf functions in the errors package for error internationalization.
Using Errorf
The Errorf function is used to create a new error that contains formatted error information. You can use this function to create a localized error message:
import (
"fmt"
)
func main() {
err := fmt.Errorf("操作失敗：%w", myError)
} The above code creates a new error containing the error message from myError.
Using Wrapf
Wrapf function is used to create a new error containing the formatted error appended to Among other errors. This is useful for converting low-level errors into higher-level errors:
import (
"errors"
"fmt"
)
func main() {
err := errors.Wrapf(myError, "文件打開失?。?w")
}The above code creates a new error with the error message from myError and appends "File open failed " information.
Practical case
The following is a practical case of using wrong internationalization:
import (
"errors"
"fmt"
"io"
)
func main() {
if err := readFile("file.txt"); err != nil {
log.Println(err)
}
}
func readFile(filename string) error {
file, err := os.Open(filename)
if err != nil {
return errors.Wrapf(err, "打開文件 %s 出錯", filename)
}
defer file.Close()
//從文件中讀取數(shù)據(jù)
}In this example, readFile Function internationalized file open error using Wrapf function. When a file fails to open, log.Println will print a localized error message informing the user that the file cannot be opened.
Conclusion
By using the Wrapf and Errorf functions from the errors package, you can Easily internationalize error messages in GoLang functions. This is important for multilingual applications because it allows users to see meaningful error messages in their own language.
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