Method addExpiresHeader

internal/nodes/http_request_cache.go:657–672

设置Expires Header

(expiresAt int64)

// 设置Expires Header
func (this *HTTPRequest) addExpiresHeader(expiresAt int64) {
	if this.cacheRef.ExpiresTime != nil && this.cacheRef.ExpiresTime.IsPrior && this.cacheRef.ExpiresTime.IsOn {
		if this.cacheRef.ExpiresTime.Overwrite || len(this.writer.Header().Get("Expires")) == 0 {
			if this.cacheRef.ExpiresTime.AutoCalculate {
				this.writer.Header().Set("Expires", time.Unix(utils.GMTUnixTime(expiresAt), 0).Format("Mon, 2 Jan 2006 15:04:05")+" GMT")
				this.writer.Header().Del("Cache-Control")
			} else if this.cacheRef.ExpiresTime.Duration != nil {
				var duration = this.cacheRef.ExpiresTime.Duration.Duration()
				if duration > 0 {
					this.writer.Header().Set("Expires", utils.GMTTime(time.Now().Add(duration)).Format("Mon, 2 Jan 2006 15:04:05")+" GMT")
					this.writer.Header().Del("Cache-Control")
				}
			}
		}
	}
}

// 尝试读取区间缓存
func (this *HTTPRequest) tryPartialReader(storage caches.StorageInterface, key string, useStale bool, rangeHeader string, forcePartialContent bool) (resultReader caches.Reader, ranges []rangeutils.Range, goNext bool) {