Golang : Validate email address with regular expression
This short tutorial is add on to my previous tutorial on how to validate email address with Golang. This time, the validation is done with regular expression instead of invoking external function.
There are couple of regular expressions that can be used to validate an email address. For this tutorial, we will use this
^[a-z0-9._%+\-]+@[a-z0-9.\-]+\.[a-z]{2,4}$
regular expression to validate the email address.
package main
import (
"fmt"
"regexp"
)
func validateEmail(email string) bool {
Re := regexp.MustCompile(`^[a-z0-9._%+\-]+@[a-z0-9.\-]+\.[a-z]{2,4}$`)
return Re.MatchString(email)
}
func main() {
email := "abc@abc12"
if !validateEmail(email) {
fmt.Println("Email address is invalid")
} else {
fmt.Println("Email address is VALID")
}
email = "abc@abc123.com"
if !validateEmail(email) {
fmt.Println("Email address is invalid")
} else {
fmt.Println("Email address is VALID")
}
}
Sample output :
Email address is invalid
Email address is VALID
Note :
Some people, when confronted with a problem, think, “I know, I’ll use regular expressions.” Now they have two problems. — Jamie Zawinksi
Reference :
https://groups.google.com/forum/#!topic/golang-nuts/UAq5fio6xBQ
See also : Golang : Validate email address
By Adam Ng
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