feat: 添加媒体播放功能，支持基于短时效token的播放入口及相关API接口

backend/app/services/content.go

@@ -489,6 +489,8 @@ func (s *content) AssetsByRole(ctx context.Context, tenantID, contentID int64, r
 		Select(maTbl.ALL).
 		Where(
 			maTbl.TenantID.Eq(tenantID),
+			maTbl.DeletedAt.IsNull(),
+			maTbl.Status.Eq(consts.MediaAssetStatusReady),
 			caTbl.TenantID.Eq(tenantID),
 			caTbl.ContentID.Eq(contentID),
 			caTbl.Role.Eq(role),

backend/app/services/media_delivery.go

@@ -0,0 +1,168 @@
+package services
+
+import (
+	"context"
+	"errors"
+	"time"
+
+	"quyun/v2/app/errorx"
+	"quyun/v2/database/models"
+	"quyun/v2/pkg/consts"
+	provider_jwt "quyun/v2/providers/jwt"
+
+	jwtlib "github.com/golang-jwt/jwt/v4"
+	log "github.com/sirupsen/logrus"
+	"go.ipao.vip/gen/types"
+	"gorm.io/gorm"
+)
+
+// mediaDelivery 负责“媒体播放 token -> 实际播放地址”的安全下发。
+// 当前版本只返回短时效 token 与 play endpoint；真实对象存储签名将在后续接入。
+//
+//	@provider
+type mediaDelivery struct {
+	jwt *provider_jwt.JWT
+}
+
+const defaultMediaPlayTokenTTL = 5 * time.Minute
+
+type mediaPlayClaims struct {
+	TenantID     int64                   `json:"tenant_id"`
+	ContentID    int64                   `json:"content_id"`
+	AssetID      int64                   `json:"asset_id"`
+	Role         consts.ContentAssetRole `json:"role"`
+	ViewerUserID int64                   `json:"viewer_user_id,omitempty"`
+	jwtlib.RegisteredClaims
+}
+
+func (s *mediaDelivery) CreatePlayToken(tenantID, contentID, assetID int64, role consts.ContentAssetRole, viewerUserID int64, ttl time.Duration, now time.Time) (string, *time.Time, error) {
+	if tenantID <= 0 || contentID <= 0 || assetID <= 0 {
+		return "", nil, errorx.ErrInvalidParameter.WithMsg("tenant_id/content_id/asset_id must be > 0")
+	}
+	if ttl <= 0 {
+		ttl = defaultMediaPlayTokenTTL
+	}
+	if now.IsZero() {
+		now = time.Now()
+	}
+
+	exp := now.Add(ttl).UTC()
+	claims := &mediaPlayClaims{
+		TenantID:     tenantID,
+		ContentID:    contentID,
+		AssetID:      assetID,
+		Role:         role,
+		ViewerUserID: viewerUserID,
+		RegisteredClaims: jwtlib.RegisteredClaims{
+			Issuer:    "v2-media",
+			IssuedAt:  jwtlib.NewNumericDate(now.UTC()),
+			NotBefore: jwtlib.NewNumericDate(now.Add(-10 * time.Second).UTC()),
+			ExpiresAt: jwtlib.NewNumericDate(exp),
+		},
+	}
+
+	token := jwtlib.NewWithClaims(jwtlib.SigningMethodHS256, claims)
+	signed, err := token.SignedString(s.jwt.SigningKey)
+	if err != nil {
+		return "", nil, errorx.Wrap(err).WithMsg("sign play token failed")
+	}
+	return signed, &exp, nil
+}
+
+func (s *mediaDelivery) ParsePlayToken(tokenString string) (*mediaPlayClaims, error) {
+	token, err := jwtlib.ParseWithClaims(tokenString, &mediaPlayClaims{}, func(token *jwtlib.Token) (interface{}, error) {
+		if _, ok := token.Method.(*jwtlib.SigningMethodHMAC); !ok {
+			return nil, errorx.ErrSignatureInvalid.WithMsg("unexpected signing method")
+		}
+		return s.jwt.SigningKey, nil
+	})
+	if err != nil {
+		var ve *jwtlib.ValidationError
+		if errors.As(err, &ve) {
+			switch {
+			case ve.Errors&jwtlib.ValidationErrorExpired != 0:
+				return nil, errorx.ErrDataExpired.WithMsg("play token expired")
+			case ve.Errors&jwtlib.ValidationErrorNotValidYet != 0:
+				return nil, errorx.ErrPreconditionFailed.WithMsg("play token not active yet")
+			case ve.Errors&jwtlib.ValidationErrorMalformed != 0:
+				return nil, errorx.ErrInvalidParameter.WithMsg("play token malformed")
+			default:
+				return nil, errorx.ErrSignatureInvalid.WithMsg("play token invalid")
+			}
+		}
+		return nil, errorx.ErrSignatureInvalid.WithMsg("play token invalid")
+	}
+
+	claims, ok := token.Claims.(*mediaPlayClaims)
+	if !ok || !token.Valid || claims == nil {
+		return nil, errorx.ErrSignatureInvalid.WithMsg("play token invalid")
+	}
+	if claims.TenantID <= 0 || claims.ContentID <= 0 || claims.AssetID <= 0 {
+		return nil, errorx.ErrInvalidParameter.WithMsg("play token payload invalid")
+	}
+	return claims, nil
+}
+
+// ResolvePlayRedirect validates the token and resolves it to an actual playable URL.
+// 当前未接入对象存储签名：若 provider=stub 则返回 ServiceUnavailable。
+func (s *mediaDelivery) ResolvePlayRedirect(ctx context.Context, tenantID int64, token string) (string, error) {
+	if tenantID <= 0 {
+		return "", errorx.ErrInvalidParameter.WithMsg("tenant_id must be > 0")
+	}
+	claims, err := s.ParsePlayToken(token)
+	if err != nil {
+		return "", err
+	}
+	if claims.TenantID != tenantID {
+		return "", errorx.ErrForbidden.WithMsg("tenant mismatch")
+	}
+
+	log.WithFields(log.Fields{
+		"tenant_id":      tenantID,
+		"content_id":     claims.ContentID,
+		"asset_id":       claims.AssetID,
+		"role":           claims.Role,
+		"viewer_user_id": claims.ViewerUserID,
+		"exp":            claims.ExpiresAt,
+	}).Info("services.media_delivery.resolve_play_redirect")
+
+	var asset models.MediaAsset
+	if err := _db.WithContext(ctx).
+		Where("tenant_id = ? AND id = ? AND deleted_at IS NULL", tenantID, claims.AssetID).
+		First(&asset).Error; err != nil {
+		if errors.Is(err, gorm.ErrRecordNotFound) {
+			return "", errorx.ErrRecordNotFound.WithMsg("media asset not found")
+		}
+		return "", err
+	}
+	if asset.Status != consts.MediaAssetStatusReady {
+		return "", errorx.ErrPreconditionFailed.WithMsg("media asset not ready")
+	}
+
+	// 二次校验：token 必须对应“该内容 + 该角色”的绑定关系，避免 token 被滥用到非预期内容。
+	var ca models.ContentAsset
+	if err := _db.WithContext(ctx).
+		Where(
+			"tenant_id = ? AND content_id = ? AND asset_id = ? AND role = ?",
+			tenantID,
+			claims.ContentID,
+			claims.AssetID,
+			claims.Role,
+		).
+		First(&ca).Error; err != nil {
+		if errors.Is(err, gorm.ErrRecordNotFound) {
+			return "", errorx.ErrRecordNotFound.WithMsg("content asset binding not found")
+		}
+		return "", err
+	}
+
+	// 约束：play endpoint 不返回 bucket/object_key，仅负责重定向到“短时效地址”。
+	// 后续接入对象存储后，将在此处根据 provider 生成签名 URL。
+	switch asset.Provider {
+	case "stub":
+		return "", errorx.ErrServiceUnavailable.WithMsg("storage provider not configured")
+	default:
+		_ = types.JSON(asset.Meta) // keep meta referenced for future extensions
+		return "", errorx.ErrServiceUnavailable.WithMsg("storage provider not implemented: " + asset.Provider)
+	}
+}

backend/app/services/provider.gen.go

@@ -1,6 +1,8 @@
 package services
 
 import (
+	provider_jwt "quyun/v2/providers/jwt"
+
 	"go.ipao.vip/atom"
 	"go.ipao.vip/atom/container"
 	"go.ipao.vip/atom/contracts"
@@ -34,6 +36,17 @@ func Provide(opts ...opt.Option) error {
 	}); err != nil {
 		return err
 	}
+	if err := container.Container.Provide(func(
+		jwt *provider_jwt.JWT,
+	) (*mediaDelivery, error) {
+		obj := &mediaDelivery{
+			jwt: jwt,
+		}
+
+		return obj, nil
+	}); err != nil {
+		return err
+	}
 	if err := container.Container.Provide(func(
 		db *gorm.DB,
 		ledger *ledger,
@@ -52,6 +65,7 @@ func Provide(opts ...opt.Option) error {
 		db *gorm.DB,
 		ledger *ledger,
 		mediaAsset *mediaAsset,
+		mediaDelivery *mediaDelivery,
 		order *order,
 		tenant *tenant,
 		tenantJoin *tenantJoin,
@@ -59,15 +73,16 @@ func Provide(opts ...opt.Option) error {
 		user *user,
 	) (contracts.Initial, error) {
 		obj := &services{
-			content:    content,
-			db:         db,
-			ledger:     ledger,
-			mediaAsset: mediaAsset,
-			order:      order,
-			tenant:     tenant,
-			tenantJoin: tenantJoin,
-			test:       test,
-			user:       user,
+			content:       content,
+			db:            db,
+			ledger:        ledger,
+			mediaAsset:    mediaAsset,
+			mediaDelivery: mediaDelivery,
+			order:         order,
+			tenant:        tenant,
+			tenantJoin:    tenantJoin,
+			test:          test,
+			user:          user,
 		}
 		if err := obj.Prepare(); err != nil {
 			return nil, err

backend/app/services/services.gen.go

@@ -8,28 +8,30 @@ var _db *gorm.DB
 
 // exported CamelCase Services
 var (
-	Content    *content
-	Ledger     *ledger
-	MediaAsset *mediaAsset
-	Order      *order
-	Tenant     *tenant
-	TenantJoin *tenantJoin
-	Test       *test
-	User       *user
+	Content       *content
+	Ledger        *ledger
+	MediaAsset    *mediaAsset
+	MediaDelivery *mediaDelivery
+	Order         *order
+	Tenant        *tenant
+	TenantJoin    *tenantJoin
+	Test          *test
+	User          *user
 )
 
 // @provider(model)
 type services struct {
 	db *gorm.DB
 	// define Services
-	content    *content
-	ledger     *ledger
-	mediaAsset *mediaAsset
-	order      *order
-	tenant     *tenant
-	tenantJoin *tenantJoin
-	test       *test
-	user       *user
+	content       *content
+	ledger        *ledger
+	mediaAsset    *mediaAsset
+	mediaDelivery *mediaDelivery
+	order         *order
+	tenant        *tenant
+	tenantJoin    *tenantJoin
+	test          *test
+	user          *user
 }
 
 func (svc *services) Prepare() error {
@@ -39,6 +41,7 @@ func (svc *services) Prepare() error {
 	Content = svc.content
 	Ledger = svc.ledger
 	MediaAsset = svc.mediaAsset
+	MediaDelivery = svc.mediaDelivery
 	Order = svc.order
 	Tenant = svc.tenant
 	TenantJoin = svc.tenantJoin