62 lines
962 B
Go
62 lines
962 B
Go
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package httptoo
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import (
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"fmt"
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"strings"
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"time"
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)
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type Visibility int
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const (
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Default = 0
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Public = 1
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Private = 2
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)
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type CacheControlHeader struct {
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MaxAge time.Duration
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Caching Visibility
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NoStore bool
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}
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func (me *CacheControlHeader) caching() []string {
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switch me.Caching {
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case Public:
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return []string{"public"}
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case Private:
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return []string{"private"}
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default:
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return nil
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}
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}
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func (me *CacheControlHeader) maxAge() []string {
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if me.MaxAge == 0 {
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return nil
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}
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d := me.MaxAge
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if d < 0 {
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d = 0
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}
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return []string{fmt.Sprintf("max-age=%d", d/time.Second)}
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}
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func (me *CacheControlHeader) noStore() []string {
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if me.NoStore {
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return []string{"no-store"}
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}
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return nil
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}
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func (me *CacheControlHeader) concat(sss ...[]string) (ret []string) {
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for _, ss := range sss {
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ret = append(ret, ss...)
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}
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return
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}
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func (me CacheControlHeader) String() string {
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return strings.Join(me.concat(me.caching(), me.maxAge()), ", ")
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}
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