mirror of
https://github.com/TeaOSLab/EdgeNode.git
synced 2025-11-06 18:10:26 +08:00
54 lines
1.0 KiB
Go
54 lines
1.0 KiB
Go
// Copyright 2022 Liuxiangchao iwind.liu@gmail.com. All rights reserved.
|
||
|
||
package rangeutils
|
||
|
||
import "strconv"
|
||
|
||
type Range [2]int64
|
||
|
||
func NewRange(start int64, end int64) Range {
|
||
return [2]int64{start, end}
|
||
}
|
||
|
||
func (this Range) Start() int64 {
|
||
return this[0]
|
||
}
|
||
|
||
func (this Range) End() int64 {
|
||
return this[1]
|
||
}
|
||
|
||
func (this Range) Length() int64 {
|
||
return this[1] - this[0] + 1
|
||
}
|
||
|
||
func (this Range) Convert(total int64) (newRange Range, ok bool) {
|
||
if total <= 0 {
|
||
return this, false
|
||
}
|
||
if this[0] < 0 {
|
||
this[0] += total
|
||
if this[0] < 0 {
|
||
return this, false
|
||
}
|
||
this[1] = total - 1
|
||
}
|
||
if this[1] < 0 {
|
||
this[1] = total - 1
|
||
}
|
||
if this[1] > total-1 {
|
||
this[1] = total - 1
|
||
}
|
||
if this[0] > this[1] {
|
||
return this, false
|
||
}
|
||
|
||
return this, true
|
||
}
|
||
|
||
// ComposeContentRangeHeader 组合Content-Range Header
|
||
// totalSize 可能是一个数字，也可能是一个星号（*）
|
||
func (this Range) ComposeContentRangeHeader(totalSize string) string {
|
||
return "bytes " + strconv.FormatInt(this[0], 10) + "-" + strconv.FormatInt(this[1], 10) + "/" + totalSize
|
||
}
|