init: web_hgdjc_server

2026-11-07 10:46:18 +08:00
commit b2ff6ac8ff
707 changed files with 147645 additions and 0 deletions
@@ -0,0 +1,96 @@
+package m3u8
+
+import (
+	"bufio"
+	"bytes"
+	"io"
+	"strings"
+	"videoweb/pub/common/errors"
+	"videoweb/pub/common/utils"
+	"videoweb/pub/storage/proxy"
+)
+
+// TransformVtt 读取雪碧图 vtt 文件，并把其中的缩略图路径替换为图片 cdn 地址。
+// 兼容现有 /laosiji 路径资源：laosiji 的 vtt 需移除 /laosiji 前缀后，从 lsjImageYuan 源站读取。
+// imgCdn       图片 cdn 域名（缩略图访问地址）
+// origDomain   普通媒资的源站域名
+// lsjImageYuan 老司机图片源站域名（由 app/web 项目从配置 lsjMediaConf.imageYuan 传入）
+func TransformVtt(name, imgCdn, origDomain, lsjImageYuan string) (buff []byte, err error) {
+	if name == "" {
+		err = errors.MakeWithMsg(errors.M3u8FileName, "vtt file name is empty")
+		return
+	}
+	if imgCdn == "" || origDomain == "" {
+		err = errors.MakeWithMsg(errors.DomainErr, "imgCdn or origDomain is empty")
+		return
+	}
+
+	mediaVersion := proxy.AppendsMediaS3Version(name)
+	if len(mediaVersion) > 0 {
+		name = mediaVersion + name
+	}
+
+	originName := name
+	if strings.Contains(name, "laosiji") {
+		if lsjImageYuan == "" {
+			err = errors.MakeWithMsg(errors.DomainErr, "lsjImageYuan is empty")
+			return
+		}
+		originName = stripLaosijiPrefix(name)
+		origDomain = lsjImageYuan
+	}
+
+	srcReader, err := readFromRedis(originName, origDomain)
+	if err != nil {
+		return
+	}
+	raw, err := io.ReadAll(srcReader)
+	if err != nil {
+		return nil, errors.MakeWithMsg(errors.M3u8Read, "read vtt reader fail: "+err.Error())
+	}
+
+	dirPath := utils.PathForInfo(name).Dir
+	buff = rewriteVttWithCDN(raw, imgCdn, dirPath)
+	return
+}
+
+func stripLaosijiPrefix(name string) string {
+	p := strings.TrimPrefix(name, "/")
+	p = strings.TrimPrefix(p, "laosiji")
+	p = strings.TrimPrefix(p, "/")
+	return p
+}
+
+func rewriteVttWithCDN(vttData []byte, imgCdn, dirPath string) []byte {
+	imgCdn = strings.TrimRight(strings.TrimSpace(imgCdn), "/")
+
+	var out bytes.Buffer
+	scanner := bufio.NewScanner(bytes.NewReader(vttData))
+	scanner.Buffer(make([]byte, 0, 64*1024), 1024*1024)
+
+	for scanner.Scan() {
+		line := scanner.Text()
+		trim := strings.TrimSpace(line)
+
+		if idx := strings.Index(trim, "#xywh="); idx >= 0 {
+			p := strings.TrimSpace(trim[:idx])
+			xywh := trim[idx:]
+
+			var newPath string
+			switch {
+			case strings.HasPrefix(p, "http://") || strings.HasPrefix(p, "https://"):
+				newPath = p
+			case strings.HasPrefix(p, "/"):
+				newPath = imgCdn + p
+			default:
+				newPath = utils.JoinUrlPath(utils.JoinUrlPath(imgCdn, strings.TrimRight(dirPath, "/")), p)
+			}
+			out.WriteString(newPath + xywh + "\n")
+			continue
+		}
+
+		out.WriteString(line + "\n")
+	}
+
+	return out.Bytes()
+}