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moby--moby/pkg/urlutil/urlutil.go

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// Package urlutil provides helper function to check urls kind.
// It supports http urls, git urls and transport url (tcp://, …)
package urlutil
import (
"regexp"
"strings"
)
var (
validPrefixes = map[string][]string{
"url": {"http://", "https://"},
"git": {"git://", "github.com/", "git@"},
"transport": {"tcp://", "tcp+tls://", "udp://", "unix://", "unixgram://"},
}
urlPathWithFragmentSuffix = regexp.MustCompile(".git(?:#.+)?$")
)
// IsURL returns true if the provided str is an HTTP(S) URL.
func IsURL(str string) bool {
return checkURL(str, "url")
}
// IsGitURL returns true if the provided str is a git repository URL.
func IsGitURL(str string) bool {
if IsURL(str) && urlPathWithFragmentSuffix.MatchString(str) {
return true
}
return checkURL(str, "git")
}
// IsTransportURL returns true if the provided str is a transport (tcp, tcp+tls, udp, unix) URL.
func IsTransportURL(str string) bool {
return checkURL(str, "transport")
}
func checkURL(str, kind string) bool {
for _, prefix := range validPrefixes[kind] {
if strings.HasPrefix(str, prefix) {
return true
}
}
return false
}