79 lines
1.6 KiB
Go
79 lines
1.6 KiB
Go
package proxy
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import (
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"fmt"
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"net"
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"strconv"
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"strings"
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"time"
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)
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type Scheme string
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const (
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SchemeHTTP Scheme = "http"
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SchemeHTTPS Scheme = "https"
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SchemeSOCKS5 Scheme = "socks5"
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)
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type Proxy struct {
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ID string
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Scheme Scheme
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Host string
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Port uint16
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Username string
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CredentialVersion string
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SecretRef string
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SourceUpstream string
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CreatedAt time.Time
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ExpiresAt *time.Time
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LastCheckedAt *time.Time
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LastSuccessAt *time.Time
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Latency time.Duration
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MaxConcurrency int64
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State State
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Tags map[string]string
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}
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func (p Proxy) UniqueKey() string {
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host := strings.TrimSuffix(strings.ToLower(strings.TrimSpace(p.Host)), ".")
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return strings.Join([]string{
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string(p.Scheme),
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host,
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strconv.FormatUint(uint64(p.Port), 10),
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p.Username,
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p.CredentialVersion,
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}, "|")
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}
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func (p Proxy) Address() string {
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return net.JoinHostPort(p.Host, strconv.FormatUint(uint64(p.Port), 10))
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}
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func (p *Proxy) Transition(next State) error {
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if p == nil {
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return fmt.Errorf("transition proxy: nil proxy")
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}
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if !CanTransition(p.State, next) {
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return fmt.Errorf("transition proxy: %s -> %s is not allowed", p.State, next)
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}
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p.State = next
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return nil
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}
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func EffectiveExpiry(now time.Time, expiresAt *time.Time, responseTTL, configuredTTL time.Duration) *time.Time {
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if expiresAt != nil {
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value := expiresAt.UTC()
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return &value
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}
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if responseTTL > 0 {
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value := now.UTC().Add(responseTTL)
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return &value
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}
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if configuredTTL > 0 {
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value := now.UTC().Add(configuredTTL)
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return &value
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}
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return nil
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}
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