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refactor(P3): Redis 缓存键版本化 — Client 增加 Key() 方法，默认前缀 v1:

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This commit is contained in:
Sisyphus
2026-04-25 16:57:02 +08:00
parent 41ae86f908
commit dd47b48473
7 changed files with 544 additions and 536 deletions
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311
backend/internal/account/service.go
View File

@@ -1,156 +1,155 @@
package account
import (
"context"
"errors"
"feedsystem_video_go/internal/auth"
"fmt"
"log"
"time"
rediscache "feedsystem_video_go/internal/middleware/redis"
"github.com/go-sql-driver/mysql"
"golang.org/x/crypto/bcrypt"
"gorm.io/gorm"
)
type AccountService struct {
accountRepository *AccountRepository
cache *rediscache.Client
}
var (
ErrUsernameTaken = errors.New("username already exists")
ErrNewUsernameRequired = errors.New("new_username is required")
)
func NewAccountService(accountRepository *AccountRepository, cache *rediscache.Client) *AccountService {
return &AccountService{accountRepository: accountRepository, cache: cache}
}
func (as *AccountService) CreateAccount(ctx context.Context, account *Account) error {
passwordHash, err := bcrypt.GenerateFromPassword([]byte(account.Password), bcrypt.DefaultCost)
if err != nil {
return err
}
account.Password = string(passwordHash)
if err := as.accountRepository.CreateAccount(ctx, account); err != nil {
return err
}
return nil
}
func (as *AccountService) Rename(ctx context.Context, accountID uint, newUsername string) (string, error) {
if newUsername == "" {
return "", ErrNewUsernameRequired
}
token, err := auth.GenerateToken(accountID, newUsername)
if err != nil {
return "", err
}
if err := as.accountRepository.RenameWithToken(ctx, accountID, newUsername, token); err != nil {
var mysqlErr *mysql.MySQLError
if errors.As(err, &mysqlErr) && mysqlErr.Number == 1062 {
return "", ErrUsernameTaken
}
if errors.Is(err, gorm.ErrRecordNotFound) {
return "", err
}
return "", err
}
if as.cache != nil {
cacheCtx, cancel := context.WithTimeout(ctx, 50*time.Millisecond)
defer cancel()
if err := as.cache.SetBytes(cacheCtx, fmt.Sprintf("account:%d", accountID), []byte(token), 24*time.Hour); err != nil {
log.Printf("failed to set cache: %v", err)
}
}
return token, nil
}
func (as *AccountService) ChangePassword(ctx context.Context, username, oldPassword, newPassword string) error {
account, err := as.FindByUsername(ctx, username)
if err != nil {
return err
}
if err := bcrypt.CompareHashAndPassword([]byte(account.Password), []byte(oldPassword)); err != nil {
return err
}
passwordHash, err := bcrypt.GenerateFromPassword([]byte(newPassword), bcrypt.DefaultCost)
if err != nil {
return err
}
if err := as.accountRepository.ChangePassword(ctx, account.ID, string(passwordHash)); err != nil {
return err
}
if err := as.Logout(ctx, account.ID); err != nil {
return err
}
return nil
}
func (as *AccountService) FindByID(ctx context.Context, id uint) (*Account, error) {
if account, err := as.accountRepository.FindByID(ctx, id); err != nil {
return nil, err
} else {
return account, nil
}
}
func (as *AccountService) FindByUsername(ctx context.Context, username string) (*Account, error) {
if account, err := as.accountRepository.FindByUsername(ctx, username); err != nil {
return nil, err
} else {
return account, nil
}
}
func (as *AccountService) Login(ctx context.Context, username, password string) (string, error) {
account, err := as.FindByUsername(ctx, username)
if err != nil {
return "", err
}
if err := bcrypt.CompareHashAndPassword([]byte(account.Password), []byte(password)); err != nil {
return "", err
}
// generate token
token, err := auth.GenerateToken(account.ID, account.Username)
if err != nil {
return "", err
}
if err := as.accountRepository.Login(ctx, account.ID, token); err != nil {
return "", err
}
if as.cache != nil {
cacheCtx, cancel := context.WithTimeout(ctx, 50*time.Millisecond)
defer cancel()
if err := as.cache.SetBytes(cacheCtx, fmt.Sprintf("account:%d", account.ID), []byte(token), 24*time.Hour); err != nil {
log.Printf("failed to set cache: %v", err)
}
}
return token, nil
}
func (as *AccountService) Logout(ctx context.Context, accountID uint) error {
account, err := as.FindByID(ctx, accountID)
if err != nil {
return err
}
if account.Token == "" {
return nil
}
if as.cache != nil {
cacheCtx, cancel := context.WithTimeout(ctx, 50*time.Millisecond)
defer cancel()
if err := as.cache.Del(cacheCtx, fmt.Sprintf("account:%d", account.ID)); err != nil {
log.Printf("failed to del cache: %v", err)
}
}
return as.accountRepository.Logout(ctx, account.ID)
}
package account
import (
"context"
"errors"
"feedsystem_video_go/internal/auth"
"log"
"time"
rediscache "feedsystem_video_go/internal/middleware/redis"
"github.com/go-sql-driver/mysql"
"golang.org/x/crypto/bcrypt"
"gorm.io/gorm"
)
type AccountService struct {
accountRepository *AccountRepository
cache *rediscache.Client
}
var (
ErrUsernameTaken = errors.New("username already exists")
ErrNewUsernameRequired = errors.New("new_username is required")
)
func NewAccountService(accountRepository *AccountRepository, cache *rediscache.Client) *AccountService {
return &AccountService{accountRepository: accountRepository, cache: cache}
}
func (as *AccountService) CreateAccount(ctx context.Context, account *Account) error {
passwordHash, err := bcrypt.GenerateFromPassword([]byte(account.Password), bcrypt.DefaultCost)
if err != nil {
return err
}
account.Password = string(passwordHash)
if err := as.accountRepository.CreateAccount(ctx, account); err != nil {
return err
}
return nil
}
func (as *AccountService) Rename(ctx context.Context, accountID uint, newUsername string) (string, error) {
if newUsername == "" {
return "", ErrNewUsernameRequired
}
token, err := auth.GenerateToken(accountID, newUsername)
if err != nil {
return "", err
}
if err := as.accountRepository.RenameWithToken(ctx, accountID, newUsername, token); err != nil {
var mysqlErr *mysql.MySQLError
if errors.As(err, &mysqlErr) && mysqlErr.Number == 1062 {
return "", ErrUsernameTaken
}
if errors.Is(err, gorm.ErrRecordNotFound) {
return "", err
}
return "", err
}
if as.cache != nil {
cacheCtx, cancel := context.WithTimeout(ctx, 50*time.Millisecond)
defer cancel()
if err := as.cache.SetBytes(cacheCtx, as.cache.Key("account:%d", accountID), []byte(token), 24*time.Hour); err != nil {
log.Printf("failed to set cache: %v", err)
}
}
return token, nil
}
func (as *AccountService) ChangePassword(ctx context.Context, username, oldPassword, newPassword string) error {
account, err := as.FindByUsername(ctx, username)
if err != nil {
return err
}
if err := bcrypt.CompareHashAndPassword([]byte(account.Password), []byte(oldPassword)); err != nil {
return err
}
passwordHash, err := bcrypt.GenerateFromPassword([]byte(newPassword), bcrypt.DefaultCost)
if err != nil {
return err
}
if err := as.accountRepository.ChangePassword(ctx, account.ID, string(passwordHash)); err != nil {
return err
}
if err := as.Logout(ctx, account.ID); err != nil {
return err
}
return nil
}
func (as *AccountService) FindByID(ctx context.Context, id uint) (*Account, error) {
if account, err := as.accountRepository.FindByID(ctx, id); err != nil {
return nil, err
} else {
return account, nil
}
}
func (as *AccountService) FindByUsername(ctx context.Context, username string) (*Account, error) {
if account, err := as.accountRepository.FindByUsername(ctx, username); err != nil {
return nil, err
} else {
return account, nil
}
}
func (as *AccountService) Login(ctx context.Context, username, password string) (string, error) {
account, err := as.FindByUsername(ctx, username)
if err != nil {
return "", err
}
if err := bcrypt.CompareHashAndPassword([]byte(account.Password), []byte(password)); err != nil {
return "", err
}
// generate token
token, err := auth.GenerateToken(account.ID, account.Username)
if err != nil {
return "", err
}
if err := as.accountRepository.Login(ctx, account.ID, token); err != nil {
return "", err
}
if as.cache != nil {
cacheCtx, cancel := context.WithTimeout(ctx, 50*time.Millisecond)
defer cancel()
if err := as.cache.SetBytes(cacheCtx, as.cache.Key("account:%d", account.ID), []byte(token), 24*time.Hour); err != nil {
log.Printf("failed to set cache: %v", err)
}
}
return token, nil
}
func (as *AccountService) Logout(ctx context.Context, accountID uint) error {
account, err := as.FindByID(ctx, accountID)
if err != nil {
return err
}
if account.Token == "" {
return nil
}
if as.cache != nil {
cacheCtx, cancel := context.WithTimeout(ctx, 50*time.Millisecond)
defer cancel()
if err := as.cache.Del(cacheCtx, as.cache.Key("account:%d", account.ID)); err != nil {
log.Printf("failed to del cache: %v", err)
}
}
return as.accountRepository.Logout(ctx, account.ID)
}

28
backend/internal/feed/service.go
View File

@@ -44,7 +44,7 @@ func (f *FeedService) GetVideoByIDs(ctx context.Context, videoIDs []uint) ([]*vi
//L1:本地缓存
var missedL1 []uint
for _, id := range videoIDs {
cacheKey := fmt.Sprintf("video:entity:%d", id)
cacheKey := f.rediscache.Key("video:entity:%d", id)
if f.localcache != nil {
if v, found := f.localcache.Get(cacheKey); found {
if data, ok := v.(video.Video); ok {
@@ -66,7 +66,7 @@ func (f *FeedService) GetVideoByIDs(ctx context.Context, videoIDs []uint) ([]*vi
if len(missedL1) > 0 {
cacheKeys := make([]string, len(missedL1))
for i, id := range missedL1 {
cacheKeys[i] = fmt.Sprintf("video:entity:%d", id)
cacheKeys[i] = f.rediscache.Key("video:entity:%d", id)
}
cacheCtx, cancel := context.WithTimeout(ctx, 50*time.Millisecond)
@@ -109,7 +109,7 @@ func (f *FeedService) GetVideoByIDs(ctx context.Context, videoIDs []uint) ([]*vi
wg.Add(1)
go func(videoID uint) {
defer wg.Done()
sfKey := fmt.Sprintf("sf:entity:%d", videoID)
sfKey := f.rediscache.Key("sf:entity:%d", videoID)
v, err, _ := f.requestGroup.Do(sfKey, func() (interface{}, error) {
videoList, err := f.repo.GetByIDs(ctx, []uint{videoID})
@@ -119,7 +119,7 @@ func (f *FeedService) GetVideoByIDs(ctx context.Context, videoIDs []uint) ([]*vi
}
safeCopy := *videoList[0]
cachekey := fmt.Sprintf("video:entity:%d", safeCopy.ID)
cachekey := f.rediscache.Key("video:entity:%d", safeCopy.ID)
if b, err := json.Marshal(safeCopy); err == nil {
//异步回写redis
go func(k string, b []byte) {
@@ -137,7 +137,7 @@ func (f *FeedService) GetVideoByIDs(ctx context.Context, videoIDs []uint) ([]*vi
mu.Lock()
videoMap[id] = &safeCopy
mu.Unlock()
f.localcache.Set(fmt.Sprintf("video:entity:%d", safeCopy.ID), safeCopy, 5*time.Second)
f.localcache.Set(f.rediscache.Key("video:entity:%d", safeCopy.ID), safeCopy, 5*time.Second)
}
}(id)
}
@@ -148,7 +148,7 @@ func (f *FeedService) GetVideoByIDs(ctx context.Context, videoIDs []uint) ([]*vi
// 查询最新视频 (冷热分离 + 游标分页)
func (f *FeedService) ListLatest(ctx context.Context, limit int, latestBefore time.Time, viewerAccountID uint) (ListLatestResponse, error) {
// 获取 ZSET 中最老的一条数据
zsetTail, err := f.rediscache.ZRangeWithScores(ctx, "feed:global_timeline", 0, 0)
zsetTail, err := f.rediscache.ZRangeWithScores(ctx, f.rediscache.Key("feed:global_timeline"), 0, 0)
if err != nil {
return ListLatestResponse{}, err
@@ -158,7 +158,7 @@ func (f *FeedService) ListLatest(ctx context.Context, limit int, latestBefore ti
if isZsetEmpty {
//全局静态锁：无视所有用户的不同时间戳游标
sfKey := "sf:fallback:global_timeline_rebuild"
sfKey := f.rediscache.Key("sf:fallback:global_timeline_rebuild")
v, err, _ := f.requestGroup.Do(sfKey, func() (interface{}, error) {
// 无视游标，直接去 MySQL 捞最新的 1000 条
@@ -180,7 +180,7 @@ func (f *FeedService) ListLatest(ctx context.Context, limit int, latestBefore ti
Member: fmt.Sprintf("%d", vid.ID),
})
}
f.rediscache.ZAdd(bgCtx, "feed:global_timeline", zElements...)
f.rediscache.ZAdd(bgCtx, f.rediscache.Key("feed:global_timeline"), zElements...)
return "SUCCESS", nil
})
@@ -207,7 +207,7 @@ func (f *FeedService) ListLatest(ctx context.Context, limit int, latestBefore ti
//冷数据降级查库
// 针对个别用户的防并发（此时可以用时间戳做锁，因为冷尾流量极小）
sfKey := fmt.Sprintf("sf:cold:listLatest:%d:%d", limit, reqTime)
sfKey := f.rediscache.Key("sf:cold:listLatest:%d:%d", limit, reqTime)
v, err, _ := f.requestGroup.Do(sfKey, func() (interface{}, error) {
return f.repo.ListLatest(ctx, limit, latestBefore)
})
@@ -224,7 +224,7 @@ func (f *FeedService) ListLatest(ctx context.Context, limit int, latestBefore ti
maxScore = fmt.Sprintf("%d", reqTime-1) // 防重复
}
videoIDsStr, err := f.rediscache.ZRevRangeByScore(ctx, "feed:global_timeline", maxScore, "-inf", 0, int64(limit))
videoIDsStr, err := f.rediscache.ZRevRangeByScore(ctx, f.rediscache.Key("feed:global_timeline"), maxScore, "-inf", 0, int64(limit))
if err != nil {
return ListLatestResponse{}, err
}
@@ -254,7 +254,7 @@ func (f *FeedService) ListLatest(ctx context.Context, limit int, latestBefore ti
coldCursor = latestBefore
}
sfKey := fmt.Sprintf("sf:stitch:listLatest:%d:%d", remainLimit, coldCursor.UnixMilli())
sfKey := f.rediscache.Key("sf:stitch:listLatest:%d:%d", remainLimit, coldCursor.UnixMilli())
v, err, _ := f.requestGroup.Do(sfKey, func() (interface{}, error) {
return f.repo.ListLatest(ctx, remainLimit, coldCursor)
})
@@ -343,7 +343,7 @@ func (f *FeedService) ListByFollowing(ctx context.Context, limit int, latestBefo
if !latestBefore.IsZero() {
before = latestBefore.Unix()
}
cacheKey = fmt.Sprintf("feed:listByFollowing:limit=%d:accountID=%d:before=%d", limit, viewerAccountID, before)
cacheKey = f.rediscache.Key("feed:listByFollowing:limit=%d:accountID=%d:before=%d", limit, viewerAccountID, before)
cacheCtx, cancel := context.WithTimeout(ctx, 50*time.Millisecond)
defer cancel()
@@ -413,10 +413,10 @@ func (f *FeedService) ListByPopularity(ctx context.Context, limit int, reqAsOf i
const win = 60
keys := make([]string, 0, win)
for i := 0; i < win; i++ {
keys = append(keys, "hot:video:1m:"+asOf.Add(-time.Duration(i)*time.Minute).Format("200601021504"))
keys = append(keys, f.rediscache.Key("hot:video:1m:%s", asOf.Add(-time.Duration(i)*time.Minute).Format("200601021504")))
}
dest := "hot:video:merge:1m:" + asOf.Format("200601021504") // 快照key：同一个as_of页内复用
dest := f.rediscache.Key("hot:video:merge:1m:%s", asOf.Format("200601021504")) // 快照key：同一个as_of页内复用
opCtx, cancel := context.WithTimeout(ctx, 80*time.Millisecond)
defer cancel()

279
backend/internal/middleware/jwt/jwt.go
View File

@@ -1,140 +1,139 @@
package jwt
import (
"context"
"errors"
"fmt"
"log"
"net/http"
"strings"
"time"
"feedsystem_video_go/internal/account"
"feedsystem_video_go/internal/auth"
rediscache "feedsystem_video_go/internal/middleware/redis"
"github.com/gin-gonic/gin"
)
// JWTAuth check jwt token and ensure it matches the currently stored token.
func JWTAuth(accountRepo *account.AccountRepository, cache *rediscache.Client) gin.HandlerFunc {
return func(c *gin.Context) {
authHeader := c.GetHeader("Authorization")
if authHeader == "" {
c.AbortWithStatusJSON(http.StatusUnauthorized, gin.H{"error": "missing authorization header"})
return
}
parts := strings.SplitN(authHeader, " ", 2)
if len(parts) != 2 || !strings.EqualFold(parts[0], "Bearer") {
c.AbortWithStatusJSON(http.StatusUnauthorized, gin.H{"error": "invalid authorization header"})
return
}
tokenString := parts[1]
claims, err := auth.ParseToken(tokenString)
if err != nil {
c.AbortWithStatusJSON(http.StatusUnauthorized, gin.H{"error": "invalid or expired token"})
return
}
check(c, claims, tokenString, accountRepo, cache)
}
}
func SoftJWTAuth(accountRepo *account.AccountRepository, cache *rediscache.Client) gin.HandlerFunc {
return func(c *gin.Context) {
authHeader := c.GetHeader("Authorization")
if authHeader == "" {
c.Next()
return
}
parts := strings.SplitN(authHeader, " ", 2)
if len(parts) != 2 || !strings.EqualFold(parts[0], "Bearer") {
c.AbortWithStatusJSON(http.StatusUnauthorized, gin.H{"error": "invalid authorization header"})
return
}
tokenString := parts[1]
claims, err := auth.ParseToken(tokenString)
if err != nil {
c.AbortWithStatusJSON(http.StatusUnauthorized, gin.H{"error": "invalid or expired token"})
return
}
check(c, claims, tokenString, accountRepo, cache)
}
}
func check(c *gin.Context, claims *auth.Claims, tokenString string, accountRepo *account.AccountRepository, cache *rediscache.Client) {
key := fmt.Sprintf("account:%d", claims.AccountID)
// 先查 Redis
if cache != nil {
cacheCtx, cancel := context.WithTimeout(c.Request.Context(), 50*time.Millisecond)
defer cancel()
b, err := cache.GetBytes(cacheCtx, key)
if err == nil {
if string(b) != tokenString {
c.AbortWithStatusJSON(http.StatusUnauthorized, gin.H{"error": "token has been revoked"})
return
}
c.Set("accountID", claims.AccountID)
c.Set("username", claims.Username)
c.Next()
return
}
}
// Redis 故障/未启用：查 DB 兜底
accountInfo, err := accountRepo.FindByID(c.Request.Context(), claims.AccountID)
if err != nil || accountInfo.Token == "" || accountInfo.Token != tokenString {
c.AbortWithStatusJSON(http.StatusUnauthorized, gin.H{"error": "token has been revoked"})
return
}
if cache != nil {
cacheCtx, cancel := context.WithTimeout(c.Request.Context(), 50*time.Millisecond)
defer cancel()
if err := cache.SetBytes(cacheCtx, key, []byte(tokenString), 24*time.Hour); err != nil {
log.Printf("failed to set cache: %v", err)
}
}
c.Set("accountID", claims.AccountID)
c.Set("username", claims.Username)
c.Next()
}
func GetAccountID(c *gin.Context) (uint, error) {
uidValue, exists := c.Get("accountID")
if !exists {
return 0, errors.New("accountID not found")
}
accountID, ok := uidValue.(uint)
if !ok {
return 0, errors.New("accountID has invalid type")
}
return accountID, nil
}
func GetUsername(c *gin.Context) (string, error) {
val, exists := c.Get("username")
if !exists {
return "", errors.New("username not found")
}
username, ok := val.(string)
if !ok {
return "", errors.New("username has invalid type")
}
return username, nil
}
package jwt
import (
"context"
"errors"
"log"
"net/http"
"strings"
"time"
"feedsystem_video_go/internal/account"
"feedsystem_video_go/internal/auth"
rediscache "feedsystem_video_go/internal/middleware/redis"
"github.com/gin-gonic/gin"
)
// JWTAuth check jwt token and ensure it matches the currently stored token.
func JWTAuth(accountRepo *account.AccountRepository, cache *rediscache.Client) gin.HandlerFunc {
return func(c *gin.Context) {
authHeader := c.GetHeader("Authorization")
if authHeader == "" {
c.AbortWithStatusJSON(http.StatusUnauthorized, gin.H{"error": "missing authorization header"})
return
}
parts := strings.SplitN(authHeader, " ", 2)
if len(parts) != 2 || !strings.EqualFold(parts[0], "Bearer") {
c.AbortWithStatusJSON(http.StatusUnauthorized, gin.H{"error": "invalid authorization header"})
return
}
tokenString := parts[1]
claims, err := auth.ParseToken(tokenString)
if err != nil {
c.AbortWithStatusJSON(http.StatusUnauthorized, gin.H{"error": "invalid or expired token"})
return
}
check(c, claims, tokenString, accountRepo, cache)
}
}
func SoftJWTAuth(accountRepo *account.AccountRepository, cache *rediscache.Client) gin.HandlerFunc {
return func(c *gin.Context) {
authHeader := c.GetHeader("Authorization")
if authHeader == "" {
c.Next()
return
}
parts := strings.SplitN(authHeader, " ", 2)
if len(parts) != 2 || !strings.EqualFold(parts[0], "Bearer") {
c.AbortWithStatusJSON(http.StatusUnauthorized, gin.H{"error": "invalid authorization header"})
return
}
tokenString := parts[1]
claims, err := auth.ParseToken(tokenString)
if err != nil {
c.AbortWithStatusJSON(http.StatusUnauthorized, gin.H{"error": "invalid or expired token"})
return
}
check(c, claims, tokenString, accountRepo, cache)
}
}
func check(c *gin.Context, claims *auth.Claims, tokenString string, accountRepo *account.AccountRepository, cache *rediscache.Client) {
key := cache.Key("account:%d", claims.AccountID)
// 先查 Redis
if cache != nil {
cacheCtx, cancel := context.WithTimeout(c.Request.Context(), 50*time.Millisecond)
defer cancel()
b, err := cache.GetBytes(cacheCtx, key)
if err == nil {
if string(b) != tokenString {
c.AbortWithStatusJSON(http.StatusUnauthorized, gin.H{"error": "token has been revoked"})
return
}
c.Set("accountID", claims.AccountID)
c.Set("username", claims.Username)
c.Next()
return
}
}
// Redis 故障/未启用：查 DB 兜底
accountInfo, err := accountRepo.FindByID(c.Request.Context(), claims.AccountID)
if err != nil || accountInfo.Token == "" || accountInfo.Token != tokenString {
c.AbortWithStatusJSON(http.StatusUnauthorized, gin.H{"error": "token has been revoked"})
return
}
if cache != nil {
cacheCtx, cancel := context.WithTimeout(c.Request.Context(), 50*time.Millisecond)
defer cancel()
if err := cache.SetBytes(cacheCtx, key, []byte(tokenString), 24*time.Hour); err != nil {
log.Printf("failed to set cache: %v", err)
}
}
c.Set("accountID", claims.AccountID)
c.Set("username", claims.Username)
c.Next()
}
func GetAccountID(c *gin.Context) (uint, error) {
uidValue, exists := c.Get("accountID")
if !exists {
return 0, errors.New("accountID not found")
}
accountID, ok := uidValue.(uint)
if !ok {
return 0, errors.New("accountID has invalid type")
}
return accountID, nil
}
func GetUsername(c *gin.Context) (string, error) {
val, exists := c.Get("username")
if !exists {
return "", errors.New("username not found")
}
username, ok := val.(string)
if !ok {
return "", errors.New("username has invalid type")
}
return username, nil
}

210
backend/internal/middleware/redis/redis.go
View File

@@ -1,99 +1,111 @@
package redis
import (
"context"
"crypto/rand"
"encoding/hex"
"feedsystem_video_go/internal/config"
"strconv"
"time"
redis "github.com/redis/go-redis/v9"
)
type Client struct {
rdb *redis.Client
}
func NewFromEnv(cfg *config.RedisConfig) (*Client, error) {
rdb := redis.NewClient(&redis.Options{
Addr: cfg.Host + ":" + strconv.Itoa(cfg.Port),
Password: cfg.Password,
DB: cfg.DB,
})
return &Client{rdb: rdb}, nil
}
func (c *Client) Close() error {
if c == nil || c.rdb == nil {
return nil
}
return c.rdb.Close()
}
func (c *Client) Ping(ctx context.Context) error {
if c == nil || c.rdb == nil {
return nil
}
return c.rdb.Ping(ctx).Err()
}
func IsMiss(err error) bool {
return err == redis.Nil
}
func randToken(n int) (string, error) {
b := make([]byte, n)
if _, err := rand.Read(b); err != nil {
return "", err
}
return hex.EncodeToString(b), nil
}
func (c *Client) Lock(ctx context.Context, key string, ttl time.Duration) (token string, ok bool, err error) {
if c == nil || c.rdb == nil {
return "", false, nil
}
token, err = randToken(16)
if err != nil {
return "", false, err
}
ok, err = c.rdb.SetNX(ctx, key, token, ttl).Result()
return token, ok, err
}
var unlockScript = redis.NewScript(`
if redis.call("GET", KEYS[1]) == ARGV[1] then
return redis.call("DEL", KEYS[1])
else
return 0
end
`)
var incrementWithExpireScript = redis.NewScript(`
local count = redis.call("INCR", KEYS[1])
if count == 1 then
redis.call("PEXPIRE", KEYS[1], ARGV[1])
end
return count
`)
func (c *Client) Unlock(ctx context.Context, key string, token string) error {
if c == nil || c.rdb == nil {
return nil
}
_, err := unlockScript.Run(ctx, c.rdb, []string{key}, token).Result()
return err
}
func (c *Client) IncrementWithExpire(ctx context.Context, key string, expire time.Duration) (int64, error) {
if c == nil || c.rdb == nil {
return 0, nil
}
return incrementWithExpireScript.Run(
ctx,
c.rdb,
[]string{key},
expire.Milliseconds(),
).Int64()
}
package redis
import (
"context"
"crypto/rand"
"encoding/hex"
"feedsystem_video_go/internal/config"
"fmt"
"strconv"
"time"
redis "github.com/redis/go-redis/v9"
)
type Client struct {
rdb *redis.Client
keyPrefix string
}
const defaultKeyPrefix = "v1:"
func NewFromEnv(cfg *config.RedisConfig) (*Client, error) {
rdb := redis.NewClient(&redis.Options{
Addr: cfg.Host + ":" + strconv.Itoa(cfg.Port),
Password: cfg.Password,
DB: cfg.DB,
})
return &Client{rdb: rdb, keyPrefix: defaultKeyPrefix}, nil
}
func (c *Client) Close() error {
if c == nil || c.rdb == nil {
return nil
}
return c.rdb.Close()
}
func (c *Client) Ping(ctx context.Context) error {
if c == nil || c.rdb == nil {
return nil
}
return c.rdb.Ping(ctx).Err()
}
func IsMiss(err error) bool {
return err == redis.Nil
}
func (c *Client) Key(format string, args ...any) string {
prefix := ""
if c != nil {
prefix = c.keyPrefix
}
return prefix + fmt.Sprintf(format, args...)
}
func randToken(n int) (string, error) {
b := make([]byte, n)
if _, err := rand.Read(b); err != nil {
return "", err
}
return hex.EncodeToString(b), nil
}
func (c *Client) Lock(ctx context.Context, key string, ttl time.Duration) (token string, ok bool, err error) {
if c == nil || c.rdb == nil {
return "", false, nil
}
token, err = randToken(16)
if err != nil {
return "", false, err
}
ok, err = c.rdb.SetNX(ctx, key, token, ttl).Result()
return token, ok, err
}
var unlockScript = redis.NewScript(`
if redis.call("GET", KEYS[1]) == ARGV[1] then
return redis.call("DEL", KEYS[1])
else
return 0
end
`)
var incrementWithExpireScript = redis.NewScript(`
local count = redis.call("INCR", KEYS[1])
if count == 1 then
redis.call("PEXPIRE", KEYS[1], ARGV[1])
end
return count
`)
func (c *Client) Unlock(ctx context.Context, key string, token string) error {
if c == nil || c.rdb == nil {
return nil
}
_, err := unlockScript.Run(ctx, c.rdb, []string{key}, token).Result()
return err
}
func (c *Client) IncrementWithExpire(ctx context.Context, key string, expire time.Duration) (int64, error) {
if c == nil || c.rdb == nil {
return 0, nil
}
return incrementWithExpireScript.Run(
ctx,
c.rdb,
[]string{key},
expire.Milliseconds(),
).Int64()
}

57
backend/internal/video/popularity_cache.go
View File

@@ -1,29 +1,28 @@
package video
import (
"context"
"fmt"
"strconv"
"time"
rediscache "feedsystem_video_go/internal/middleware/redis"
)
// 更新视频流行度缓存
func UpdatePopularityCache(ctx context.Context, cache *rediscache.Client, id uint, change int64) {
if cache == nil || id == 0 || change == 0 {
return
}
_ = cache.Del(context.Background(), fmt.Sprintf("video:detail:id=%d", id))
now := time.Now().UTC().Truncate(time.Minute)
windowKey := "hot:video:1m:" + now.Format("200601021504")
member := strconv.FormatUint(uint64(id), 10)
opCtx, cancel := context.WithTimeout(ctx, 50*time.Millisecond)
defer cancel()
_ = cache.ZincrBy(opCtx, windowKey, member, float64(change))
_ = cache.Expire(opCtx, windowKey, 2*time.Hour)
}
package video
import (
"context"
"strconv"
"time"
rediscache "feedsystem_video_go/internal/middleware/redis"
)
// 更新视频流行度缓存
func UpdatePopularityCache(ctx context.Context, cache *rediscache.Client, id uint, change int64) {
if cache == nil || id == 0 || change == 0 {
return
}
_ = cache.Del(context.Background(), cache.Key("video:detail:id=%d", id))
now := time.Now().UTC().Truncate(time.Minute)
windowKey := cache.Key("hot:video:1m:%s", now.Format("200601021504"))
member := strconv.FormatUint(uint64(id), 10)
opCtx, cancel := context.WithTimeout(ctx, 50*time.Millisecond)
defer cancel()
_ = cache.ZincrBy(opCtx, windowKey, member, float64(change))
_ = cache.Expire(opCtx, windowKey, 2*time.Hour)
}

9
backend/internal/video/video_service.go
View File

@@ -4,7 +4,6 @@ import (
"context"
"encoding/json"
"errors"
"fmt"
"strconv"
"strings"
"time"
@@ -83,7 +82,7 @@ func (vs *VideoService) Delete(ctx context.Context, id uint, authorID uint) erro
return err
}
if vs.cache != nil {
cacheKey := fmt.Sprintf("video:detail:id=%d", id)
cacheKey := vs.cache.Key("video:detail:id=%d", id)
_ = vs.cache.Del(context.Background(), cacheKey)
}
return nil
@@ -98,7 +97,7 @@ func (vs *VideoService) ListByAuthorID(ctx context.Context, authorID uint) ([]Vi
}
func (vs *VideoService) GetDetail(ctx context.Context, id uint) (*Video, error) {
cacheKey := fmt.Sprintf("video:detail:id=%d", id)
cacheKey := vs.cache.Key("video:detail:id=%d", id)
getCached := func() (*Video, bool) {
opCtx, cancel := context.WithTimeout(ctx, 50*time.Millisecond)
@@ -204,11 +203,11 @@ func (vs *VideoService) UpdatePopularity(ctx context.Context, id uint, change in
if vs.cache != nil {
// 1) 详情缓存：直接失效（最简单靠谱）
_ = vs.cache.Del(context.Background(), fmt.Sprintf("video:detail:id=%d", id))
_ = vs.cache.Del(context.Background(), vs.cache.Key("video:detail:id=%d", id))
// 2) 热榜：写到“时间窗ZSET”，不要用 detail key
now := time.Now().UTC().Truncate(time.Minute)
windowKey := "hot:video:1m:" + now.Format("200601021504")
windowKey := vs.cache.Key("hot:video:1m:%s", now.Format("200601021504"))
member := strconv.FormatUint(uint64(id), 10)
opCtx, cancel := context.WithTimeout(ctx, 50*time.Millisecond)

186
backend/internal/worker/outboxworker.go
View File

@@ -1,93 +1,93 @@
package worker
import (
"context"
"encoding/json"
"feedsystem_video_go/internal/middleware/rabbitmq"
"feedsystem_video_go/internal/middleware/redis"
"feedsystem_video_go/internal/video"
"fmt"
"log"
"time"
oredis "github.com/redis/go-redis/v9"
"gorm.io/gorm"
)
func StartOutboxPoller(db *gorm.DB, tmq *rabbitmq.TimelineMQ) {
go func() {
for {
var messages []video.OutboxMsg
err := db.Where("status = ?", "pending").Order("create_time ASC").Limit(100).Find(&messages).Error
if err != nil || len(messages) == 0 {
time.Sleep(1 * time.Second)
continue
}
for _, msg := range messages {
err := tmq.PublishVideo(context.Background(), msg.VideoID, msg.CreateTime)
if err == nil {
db.Delete(&msg)
} else {
log.Printf("投递MQ失败: VideoID: %d, err: %v", msg.VideoID, err)
}
}
}
}()
}
func StartConsumer(tmq *rabbitmq.TimelineMQ, queueName string, redisClient *redis.Client) {
msgs, err := tmq.Ch.Consume(
queueName,
"",
false,
false,
false,
false,
nil,
)
if err != nil {
log.Printf("注册消费失败")
return
}
go func() {
for msg := range msgs {
var event rabbitmq.TimelineEvent
err := json.Unmarshal(msg.Body, &event)
if err != nil {
log.Printf("反序列化失败")
msg.Ack(false)
continue
}
ctx, cancel := context.WithTimeout(context.Background(), 50*time.Millisecond)
timelineKey := "feed:global_timeline"
err = redisClient.ZAdd(ctx, timelineKey, oredis.Z{
Score: float64(event.CreateTime),
Member: fmt.Sprintf("%d", event.VideoID),
})
if err != nil {
log.Printf("写入Zset失败")
msg.Nack(false, true)
cancel()
continue
}
err = redisClient.ZRemRangeByRank(ctx, timelineKey, 0, -1001)
if err != nil {
log.Printf("ZRem失败")
}
msg.Ack(false)
cancel()
}
}()
}
package worker
import (
"context"
"encoding/json"
"feedsystem_video_go/internal/middleware/rabbitmq"
"feedsystem_video_go/internal/middleware/redis"
"feedsystem_video_go/internal/video"
"fmt"
"log"
"time"
oredis "github.com/redis/go-redis/v9"
"gorm.io/gorm"
)
func StartOutboxPoller(db *gorm.DB, tmq *rabbitmq.TimelineMQ) {
go func() {
for {
var messages []video.OutboxMsg
err := db.Where("status = ?", "pending").Order("create_time ASC").Limit(100).Find(&messages).Error
if err != nil || len(messages) == 0 {
time.Sleep(1 * time.Second)
continue
}
for _, msg := range messages {
err := tmq.PublishVideo(context.Background(), msg.VideoID, msg.CreateTime)
if err == nil {
db.Delete(&msg)
} else {
log.Printf("投递MQ失败: VideoID: %d, err: %v", msg.VideoID, err)
}
}
}
}()
}
func StartConsumer(tmq *rabbitmq.TimelineMQ, queueName string, redisClient *redis.Client) {
msgs, err := tmq.Ch.Consume(
queueName,
"",
false,
false,
false,
false,
nil,
)
if err != nil {
log.Printf("注册消费失败")
return
}
go func() {
for msg := range msgs {
var event rabbitmq.TimelineEvent
err := json.Unmarshal(msg.Body, &event)
if err != nil {
log.Printf("反序列化失败")
msg.Ack(false)
continue
}
ctx, cancel := context.WithTimeout(context.Background(), 50*time.Millisecond)
timelineKey := redisClient.Key("feed:global_timeline")
err = redisClient.ZAdd(ctx, timelineKey, oredis.Z{
Score: float64(event.CreateTime),
Member: fmt.Sprintf("%d", event.VideoID),
})
if err != nil {
log.Printf("写入Zset失败")
msg.Nack(false, true)
cancel()
continue
}
err = redisClient.ZRemRangeByRank(ctx, timelineKey, 0, -1001)
if err != nil {
log.Printf("ZRem失败")
}
msg.Ack(false)
cancel()
}
}()
}