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|
package config
import (
"fmt"
"net"
"net/url"
"strings"
"gopkg.in/yaml.v3"
)
type Url struct {
Scheme string `yaml:"scheme"`
User string `yaml:"user"`
Password string `yaml:"password"`
Host string `yaml:"host"`
Port string `yaml:"port"`
Root string `yaml:"root"`
}
func (u *Url) Empty() bool {
return u.Host == ""
}
func (u *Url) EmptyRoot() bool {
return u.Root == "" || u.Root == "/"
}
func (u *Url) UnmarshalYAML(value *yaml.Node) (err error) {
if value.ShortTag() == strTag {
var val string
var rawUrl *url.URL
if err = value.Decode(&val); err != nil {
return err
}
if rawUrl, err = url.Parse(val); err != nil {
return err
}
u.Scheme = rawUrl.Scheme
u.User = rawUrl.User.Username()
u.Password, _ = rawUrl.User.Password()
u.Host = rawUrl.Hostname()
u.Port = rawUrl.Port()
u.Root = rawUrl.Path
} else {
type _url Url // avoid recursion
wrapped := (*_url)(u)
if err = value.Decode(wrapped); err != nil {
return err
}
}
u.sanitize()
if errors := u.validate(); len(errors) > 0 {
errs := make([]string, len(errors)+1)
copy(errs[1:], errors)
errs[0] = fmt.Sprintf("line %d: Invalid target:", value.Line)
return &yaml.TypeError{Errors: errs}
}
return nil
}
func (u Url) String() string {
var sb strings.Builder
sb.WriteString(u.Scheme)
sb.WriteString("://")
if u.User != "" {
sb.WriteString(u.User)
if u.Password != "" {
sb.WriteString(":******")
}
sb.WriteRune('@')
}
sb.WriteString(u.HostPort())
if u.Root != "" {
if u.Root[0] != '/' {
sb.WriteRune('/')
}
sb.WriteString(u.Root)
}
return sb.String()
}
func (u *Url) HostPort() string {
if u.Port != "" {
return net.JoinHostPort(u.Host, u.Port)
}
return u.Host
}
const (
imapsPort = "993"
imapPort = "143"
imapsSchema = "imaps"
imapsSchemaFull = imapsSchema + "://"
imapSchema = "imap"
imapSchemaFull = imapSchema + "://"
maildirSchemaFull = "maildir://"
)
func isRecognizedUrl(s string) bool {
return isImapUrl(s) || isMaildirUrl(s)
}
func isImapUrl(s string) bool {
return strings.HasPrefix(s, imapsSchemaFull) || strings.HasPrefix(s, imapSchemaFull)
}
func isMaildirUrl(s string) bool {
return strings.HasPrefix(s, maildirSchemaFull)
}
func (u *Url) ForceTLS() bool {
return u.Scheme == imapsSchema || u.Port == imapsPort
}
func (u *Url) setDefaultScheme() {
if u.Scheme == "" {
if u.Port == imapsPort {
u.Scheme = imapsSchema
} else {
u.Scheme = imapSchema
}
}
}
func (u *Url) setDefaultPort() {
if u.Port == "" {
if u.Scheme == imapsSchema {
u.Port = imapsPort
} else {
u.Port = imapPort
}
}
}
func (u *Url) sanitize() {
u.setDefaultScheme()
u.setDefaultPort()
}
func (u *Url) validate() (errors []string) {
if u.Scheme != imapSchema && u.Scheme != imapsSchema {
errors = append(errors, fmt.Sprintf("Unknown scheme %q", u.Scheme))
}
if u.Host == "" {
errors = append(errors, "Host not set")
}
return
}
func (u Url) BaseUrl() Url {
// 'u' is not a pointer and thus a copy, modification is fine
u.Root = ""
return u
}
func (u *Url) CommonBaseUrl(other Url) bool {
other.Root = ""
return other == u.BaseUrl()
}
func (u *Url) RootPath() []string {
path := u.Root
if path[0] == '/' {
path = path[1:]
}
return strings.Split(path, "/")
}
|
