golang에서 정규식을 사용하여 URL 주소가 7단계 도메인 이름인지 확인하는 방법

import (
    "fmt"
    "net/url"
)

func main() {
    rawurl := "https://blog.baid.com/path/to/resource"
    parsedUrl, err := url.Parse(rawurl)
    if err != nil {
        fmt.Printf("Parsing URL failed: %s
", err.Error())
        return
    }

    fmt.Println(parsedUrl.Scheme)     // 输出 "https"
    fmt.Println(parsedUrl.Hostname()) // 输出 "blog.baid.com"
    fmt.Println(parsedUrl.Path)       // 输出 "/path/to/resource"
}

import (
    "fmt"
    "regexp"
)

func main() {
    hostname := "blog.baid.com" // 从上一步获取
    sevenLevelDomain := `^([a-zA-Z0-9][-a-zA-Z0-9]{0,61}[a-zA-Z0-9].)+([a-zA-Z]{2,})$`

    matched, err := regexp.MatchString(sevenLevelDomain, hostname)
    if err != nil {
        fmt.Printf("Regex validation failed: %s
", err.Error())
        return
    }

    if matched {
        fmt.Println("This is a valid seven-level domain.")
    } else {
        fmt.Println("This is NOT a valid seven-level domain.")
    }
}

import (
    "fmt"
    "net/url"
    "regexp"
)

func main() {
    rawurl := "https://blog.baid.com/path/to/resource"

    parsedUrl, err := url.Parse(rawurl)
    if err != nil {
        fmt.Printf("Parsing URL failed: %s
", err.Error())
        return
    }

    sevenLevelDomain := `^([a-zA-Z0-9][-a-zA-Z0-9]{0,61}[a-zA-Z0-9].)+([a-zA-Z]{2,})$`
    matched, err := regexp.MatchString(sevenLevelDomain, parsedUrl.Hostname())
    if err != nil {
        fmt.Printf("Regex validation failed: %s
", err.Error())
        return
    }

    if matched {
        fmt.Printf("%s is a valid seven-level domain.
", parsedUrl.Hostname())
    } else {
        fmt.Printf("%s is NOT a valid seven-level domain.
", parsedUrl.Hostname())
    }
}