如何在Go中验证电子邮件地址
我检查了 StackOverflow 并找不到任何可以回答如何在 Go Language 中验证电子邮件的问题。
经过一番研究，我想出了并根据我的需要解决了它。
我有这个正则表达式和Go 函数，它工作正常：
import (
"fmt"
"regexp"
)
func main() {
fmt.Println(isEmailValid("test44@gmail.com")) // true
fmt.Println(isEmailValid("test$@gmail.com")) // true -- expected "false"
}
// isEmailValid checks if the email provided is valid by regex.
func isEmailValid(e string) bool {
emailRegex := regexp.MustCompile("^[a-zA-Z0-9.!#$%&'*+/=?^_`{|}~-]+@[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?(?:.[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?)*$")
return emailRegex.MatchString(e)
}
问题是它接受了我不想要的特殊字符。我尝试使用一些来自其他语言的“正则表达式”表达式，但它在调试中抛出错误“未知转义”。
谁能给我一个很好的正则表达式或任何适用于 GoLang 的快速解决方案 (pkg)？
回答
标准库内置了电子邮件解析和验证，只需使用：mail.ParseAddress()。
一个简单的“有效”测试：
func valid(email string) bool {
_, err := mail.ParseAddress(email)
return err == nil
}
测试它：
for _, email := range []string{
"good@exmaple.com",
"bad-example",
} {
fmt.Printf("%18s valid: %tn", email, valid(email))
}
哪些输出（在Go Playground上试试）：
good@exmaple.com valid: true
bad-example valid: false
-
Thanks for that, it's working on most of the cases. Still, I have some issues with the following invalid emails:
"email@example.com (Joe Smith)",
"email@example" - @RiyazKhan `example` is a valid domain, just like `example.com`. It does not necessarily have to designate a public domain, it may be a local domain of a local network. As to the `(Joe Smith)` part: it's a comment and it may be anywhere in the email, see [Wikipedia: Email address](https://en.wikipedia.org/wiki/Email_address). Trust me, the `net/mail` package can parse email addresses better, faster and more reliably than your custom solution can.