如何在 Golang 中用正则表达式检测 URL？

regexp.MustCompile(pattern)

^(https?://)?([da-z.-]+).([a-z.]{2,6})([/w .-]*)*/?$

package main

import (
    "fmt"
    "regexp"
)

func main() {
    // 要检测的 URL
    urls := []string{
        "https://www.google.com",
        "http://example.com",
        "ftp://ftp.example.com",
        "example.com",
        "127.0.0.1",
        "google.com",
    }

    // 正则表达式模式
    pattern := "^(https?:\/\/)?([\da-z\.-]+)\.([a-z\.]{2,6})([\/\w \.-]*)*\/?$"

    for _, url := range urls {
        result, err := regexp.MatchString(pattern, url)
        if err != nil {
            fmt.Println("Error:", err)
        }

        if result {
            fmt.Println("Valid URL:", url)
        } else {
            fmt.Println("Invalid URL:", url)
        }
    }
}

Valid URL: https://www.google.com
Valid URL: http://example.com
Invalid URL: ftp://ftp.example.com
Invalid URL: example.com
Invalid URL: 127.0.0.1
Invalid URL: google.com