Add support for resp3 protocol (#1739)

* support resp3 protocol

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

* Upgrade mod version limit go1.14

#1715 (comment)

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

* Remove the redundant check of ReadReply

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

* fix the problem

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

* workflows add v9

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

* update StringStringMapCmd to MapStringStringCmd

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

.github/workflows/build.yml

@@ -4,7 +4,7 @@ on:
   push:
     branches: [master]
   pull_request:
-    branches: [master]
+    branches: [master, v9]
 
 jobs:
   build:

bench_decode_test.go

@@ -18,14 +18,17 @@ type ClientStub struct {
 	resp []byte
 }
 
+var initHello = []byte("%1\r\n+proto\r\n:3\r\n")
+
 func NewClientStub(resp []byte) *ClientStub {
 	stub := &ClientStub{
 		resp: resp,
 	}
+
 	stub.Cmdable = NewClient(&Options{
 		PoolSize: 128,
 		Dialer: func(ctx context.Context, network, addr string) (net.Conn, error) {
-			return stub.stubConn(), nil
+			return stub.stubConn(initHello), nil
 		},
 	})
 	return stub
@@ -40,7 +43,7 @@ func NewClusterClientStub(resp []byte) *ClientStub {
 		PoolSize: 128,
 		Addrs:    []string{"127.0.0.1:6379"},
 		Dialer: func(ctx context.Context, network, addr string) (net.Conn, error) {
-			return stub.stubConn(), nil
+			return stub.stubConn(initHello), nil
 		},
 		ClusterSlots: func(_ context.Context) ([]ClusterSlot, error) {
 			return []ClusterSlot{
@@ -65,18 +68,27 @@ func NewClusterClientStub(resp []byte) *ClientStub {
 	return stub
 }
 
-func (c *ClientStub) stubConn() *ConnStub {
+func (c *ClientStub) stubConn(init []byte) *ConnStub {
 	return &ConnStub{
+		init: init,
 		resp: c.resp,
 	}
 }
 
 type ConnStub struct {
+	init []byte
 	resp []byte
 	pos  int
 }
 
 func (c *ConnStub) Read(b []byte) (n int, err error) {
+	// Return conn.init()
+	if len(c.init) > 0 {
+		n = copy(b, c.init)
+		c.init = c.init[n:]
+		return n, nil
+	}
+
 	if len(c.resp) == 0 {
 		return 0, io.EOF
 	}

cluster.go

@@ -1392,12 +1392,7 @@ func (c *ClusterClient) txPipelineReadQueued(
 		return err
 	}
 
-	switch line[0] {
-	case proto.ErrorReply:
-		return proto.ParseErrorReply(line)
-	case proto.ArrayReply:
-		// ok
-	default:
+	if line[0] != proto.RespArray {
 		return fmt.Errorf("redis: expected '*', but got line %q", line)
 	}
 

cluster_test.go

@@ -1182,16 +1182,17 @@ var _ = Describe("ClusterClient with unavailable Cluster", func() {
 	var client *redis.ClusterClient
 
 	BeforeEach(func() {
-		for _, node := range cluster.clients {
-			err := node.ClientPause(ctx, 5*time.Second).Err()
-			Expect(err).NotTo(HaveOccurred())
-		}
-
 		opt := redisClusterOptions()
 		opt.ReadTimeout = 250 * time.Millisecond
 		opt.WriteTimeout = 250 * time.Millisecond
 		opt.MaxRedirects = 1
 		client = cluster.newClusterClientUnstable(opt)
+		Expect(client.Ping(ctx).Err()).NotTo(HaveOccurred())
+
+		for _, node := range cluster.clients {
+			err := node.ClientPause(ctx, 5*time.Second).Err()
+			Expect(err).NotTo(HaveOccurred())
+		}
 	})
 
 	AfterEach(func() {