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uri.go
139 lines (112 loc) · 2.11 KB
/
uri.go
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package common
import (
"net/url"
"strings"
)
type URI struct {
Scheme string
Opaque string
Username string
Password string
Host string
Port string
Path string
}
const (
SchemeSep = "://"
OpaqueSep = ":"
CredentialSep = "@"
CredentialSplit = ":"
CidrSep = "/"
CidrSplit = ":"
CidrSplitV6 = "]:"
)
func (uri *URI) Parse(s string) error {
p := strings.Index(s, SchemeSep)
if p != -1 {
uri.Scheme = s[:p]
s = s[p+len(SchemeSep):]
} else {
p := strings.Index(s, OpaqueSep)
if p != -1 {
uri.Opaque = s[:p]
uri.Path = s[p+len(OpaqueSep):]
return nil
}
}
p = strings.Index(s, CredentialSep)
if p != -1 {
sub := s[:p]
splits := strings.Split(sub, CredentialSplit)
uri.Username = splits[0]
if len(splits) > 1 {
uri.Password = splits[1]
}
s = s[p+len(CredentialSep):]
}
var cidr string
p = strings.Index(s, CidrSep)
if p != -1 {
cidr = s[:p]
uri.Path = s[p:]
} else {
cidr = s
}
sep := CidrSplit
sepAdd := 0
if isV6(cidr) {
sep = CidrSplitV6
sepAdd = 1
}
p = strings.LastIndex(cidr, sep)
if p != -1 {
uri.Host = cidr[:p+sepAdd]
uri.Port = cidr[p+len(sep):]
} else {
uri.Host = cidr
}
return nil
}
func isV6(s string) bool {
return strings.HasPrefix(s, "[")
}
func (uri *URI) IsV6() bool {
return isV6(uri.Host)
}
func (uri *URI) String() string {
sb := strings.Builder{}
if uri.Opaque != "" {
sb.WriteString(uri.Opaque)
if uri.Path != "" {
sb.WriteString(OpaqueSep)
sb.WriteString(uri.Path)
}
return sb.String()
}
if uri.Scheme != "" {
sb.WriteString(uri.Scheme)
sb.WriteString(SchemeSep)
}
if uri.Username != "" || uri.Password != "" {
if uri.Username != "" {
sb.WriteString(uri.Username)
}
if uri.Password != "" {
sb.WriteString(CredentialSplit)
sb.WriteString(uri.Password)
}
sb.WriteString(CredentialSep)
}
if uri.Host != "" {
sb.WriteString(uri.Host)
}
if uri.Port != "" {
sb.WriteString(CidrSplit)
sb.WriteString(uri.Port)
}
sb.WriteString(uri.Path)
return sb.String()
}
func (uri *URI) toURL() (*url.URL, error) {
return url.Parse(uri.String())
}