fix: fix #2681 (#2998)

Signed-off-by: monkey92t <golang@88.com>

Author: monkey92t

options.go

@@ -61,6 +61,12 @@ type Options struct {
 	// before reconnecting. It should return the current username and password.
 	CredentialsProvider func() (username string, password string)
 
+	// CredentialsProviderContext is an enhanced parameter of CredentialsProvider,
+	// done to maintain API compatibility. In the future,
+	// there might be a merge between CredentialsProviderContext and CredentialsProvider.
+	// There will be a conflict between them; if CredentialsProviderContext exists, we will ignore CredentialsProvider.
+	CredentialsProviderContext func(ctx context.Context) (username string, password string, err error)
+
 	// Database to be selected after connecting to the server.
 	DB int
 

osscluster.go

@@ -62,10 +62,11 @@ type ClusterOptions struct {
 
 	OnConnect func(ctx context.Context, cn *Conn) error
 
-	Protocol            int
-	Username            string
-	Password            string
-	CredentialsProvider func() (username string, password string)
+	Protocol                   int
+	Username                   string
+	Password                   string
+	CredentialsProvider        func() (username string, password string)
+	CredentialsProviderContext func(ctx context.Context) (username string, password string, err error)
 
 	MaxRetries      int
 	MinRetryBackoff time.Duration
@@ -272,10 +273,11 @@ func (opt *ClusterOptions) clientOptions() *Options {
 		Dialer:     opt.Dialer,
 		OnConnect:  opt.OnConnect,
 
-		Protocol:            opt.Protocol,
-		Username:            opt.Username,
-		Password:            opt.Password,
-		CredentialsProvider: opt.CredentialsProvider,
+		Protocol:                   opt.Protocol,
+		Username:                   opt.Username,
+		Password:                   opt.Password,
+		CredentialsProvider:        opt.CredentialsProvider,
+		CredentialsProviderContext: opt.CredentialsProviderContext,
 
 		MaxRetries:      opt.MaxRetries,
 		MinRetryBackoff: opt.MinRetryBackoff,

redis.go

@@ -283,8 +283,13 @@ func (c *baseClient) initConn(ctx context.Context, cn *pool.Conn) error {
 	}
 	cn.Inited = true
 
+	var err error
 	username, password := c.opt.Username, c.opt.Password
-	if c.opt.CredentialsProvider != nil {
+	if c.opt.CredentialsProviderContext != nil {
+		if username, password, err = c.opt.CredentialsProviderContext(ctx); err != nil {
+			return err
+		}
+	} else if c.opt.CredentialsProvider != nil {
 		username, password = c.opt.CredentialsProvider()
 	}
 
@@ -300,7 +305,7 @@ func (c *baseClient) initConn(ctx context.Context, cn *pool.Conn) error {
 
 	// for redis-server versions that do not support the HELLO command,
 	// RESP2 will continue to be used.
-	if err := conn.Hello(ctx, protocol, username, password, "").Err(); err == nil {
+	if err = conn.Hello(ctx, protocol, username, password, "").Err(); err == nil {
 		auth = true
 	} else if !isRedisError(err) {
 		// When the server responds with the RESP protocol and the result is not a normal
@@ -313,7 +318,7 @@ func (c *baseClient) initConn(ctx context.Context, cn *pool.Conn) error {
 		return err
 	}
 
-	_, err := conn.Pipelined(ctx, func(pipe Pipeliner) error {
+	_, err = conn.Pipelined(ctx, func(pipe Pipeliner) error {
 		if !auth && password != "" {
 			if username != "" {
 				pipe.AuthACL(ctx, username, password)