115 lines
3.0 KiB
Go
115 lines
3.0 KiB
Go
package m3u8
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import (
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//"sz-app-server/pub/common/utils"
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"crypto/md5"
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"encoding/hex"
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"fmt"
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"stat/common/utils"
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"strings"
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"time"
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"github.com/grafov/m3u8"
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)
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// makeMediaPlayList 根据from，重新生成播放列表
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func makeMediaPlayList(from *m3u8.MediaPlaylist, cdnDomain string, dirPath string, keyUri string, authKey string) (media *m3u8.MediaPlaylist, err error) {
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media, err = m3u8.NewMediaPlaylist(from.WinSize(), from.Count())
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if err != nil {
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return
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}
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base := utils.JoinUrlPath(cdnDomain, dirPath)
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now := time.Now()
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for _, segment := range from.Segments {
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if segment == nil {
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continue
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}
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sg := new(m3u8.MediaSegment)
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sg.URI = utils.JoinUrlPath(base, segment.URI)
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if len(authKey) > 0 {
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//生成鉴权url
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urlPath := utils.JoinUrlPath(dirPath, segment.URI)
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urlAuth := generateUrlAuth(now, urlPath, authKey)
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sg.URI = sg.URI + urlAuth
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}
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sg.Title = segment.Title
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sg.Duration = segment.Duration
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if err = media.AppendSegment(sg); err != nil {
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return
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}
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}
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_ = media.SetDefaultKey("AES-128", keyUri, "", "", "")
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media.Close()
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return
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}
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// 生成鉴权url
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func generateUrlAuth(now time.Time, path string, authKey string) string {
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timestamp := now.Unix()
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// randId := maths.GenUUID()
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signStr := fmt.Sprintf("%s-%d-0-0-%s", path, timestamp, authKey)
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md5Str := getMD5Sign(signStr)
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urlAuth := fmt.Sprintf("?md=%d-0-0-%s", timestamp, md5Str)
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return urlAuth
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}
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// getMD5Sign 得到签名
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func getMD5Sign(buf string) string {
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md5Ctx := md5.New()
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md5Ctx.Write([]byte(buf))
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cipherStr := md5Ctx.Sum(nil)
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nsign := hex.EncodeToString(cipherStr)
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return nsign
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}
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func newMediaPlayList(from *m3u8.MediaPlaylist, cdnDomain, origDomain, dirPath, keyUri string, needHeader bool) (media *m3u8.MediaPlaylist, err error) {
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if needHeader {
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return makeMediaPlayListWithHeader(from, cdnDomain, origDomain, dirPath, keyUri)
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} else {
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return makeMediaPlayList(from, cdnDomain, dirPath, keyUri, AuthKey)
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}
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}
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func makeMediaPlayListWithHeader(from *m3u8.MediaPlaylist, cdnDomain, origDomain string, dirPath string, keyUri string) (media *m3u8.MediaPlaylist, err error) {
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media, err = m3u8.NewMediaPlaylist(from.WinSize(), from.Count()+headerMediaPlayList.Count())
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if err != nil {
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return
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}
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//合并片m3u8
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for _, v := range headerMediaPlayList.Segments {
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if v == nil {
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continue
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}
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sg := new(m3u8.MediaSegment)
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sg.URI = v.URI
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if origDomain != "" && strings.HasPrefix(v.URI, origDomain) && origDomain != cdnDomain {
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sg.URI = strings.ReplaceAll(v.URI, origDomain, cdnDomain)
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}
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sg.Title = v.Title
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sg.Duration = v.Duration
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if err = media.AppendSegment(sg); err != nil {
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return
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}
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}
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base := utils.JoinUrlPath(cdnDomain, dirPath)
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for k, segment := range from.Segments {
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if segment == nil {
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continue
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}
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sg := new(m3u8.MediaSegment)
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sg.Discontinuity = k == 0
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sg.URI = utils.JoinUrlPath(base, segment.URI)
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sg.Title = segment.Title
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sg.Duration = segment.Duration
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if err = media.AppendSegment(sg); err != nil {
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return
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}
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}
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_ = media.SetDefaultKey("AES-128", keyUri, "", "", "")
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media.Close()
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return
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}
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