Add redis sentinel session support (#3427)

Add Redis Sentinel session support

session/redis_sentinel/sess_redis_sentinel_test.go

@@ -0,0 +1,84 @@
+package redis_sentinel
+
+import (
+	"github.com/astaxie/beego/session"
+	"net/http"
+	"net/http/httptest"
+	"testing"
+)
+
+func TestRedisSentinel(t *testing.T) {
+	sessionConfig := &session.ManagerConfig{
+		CookieName:      "gosessionid",
+		EnableSetCookie: true,
+		Gclifetime:      3600,
+		Maxlifetime:     3600,
+		Secure:          false,
+		CookieLifeTime:  3600,
+		ProviderConfig:  "119.23.132.234:26379,100,,0,master",
+	}
+	globalSessions, _ := session.NewManager("redis_sentinel", sessionConfig)
+	go globalSessions.GC()
+
+	r, _ := http.NewRequest("GET", "/", nil)
+	w := httptest.NewRecorder()
+
+	sess, err := globalSessions.SessionStart(w, r)
+	if err != nil {
+		t.Fatal("session start failed:", err)
+	}
+	defer sess.SessionRelease(w)
+
+	// SET AND GET
+	err = sess.Set("username", "astaxie")
+	if err != nil {
+		t.Fatal("set username failed:", err)
+	}
+	username := sess.Get("username")
+	if username != "astaxie" {
+		t.Fatal("get username failed")
+	}
+
+	// DELETE
+	err = sess.Delete("username")
+	if err != nil {
+		t.Fatal("delete username failed:", err)
+	}
+	username = sess.Get("username")
+	if username != nil {
+		t.Fatal("delete username failed")
+	}
+
+	// FLUSH
+	err = sess.Set("username", "astaxie")
+	if err != nil {
+		t.Fatal("set failed:", err)
+	}
+	err = sess.Set("password", "1qaz2wsx")
+	if err != nil {
+		t.Fatal("set failed:", err)
+	}
+	username = sess.Get("username")
+	if username != "astaxie" {
+		t.Fatal("get username failed")
+	}
+	password := sess.Get("password")
+	if password != "1qaz2wsx" {
+		t.Fatal("get password failed")
+	}
+	err = sess.Flush()
+	if err != nil {
+		t.Fatal("flush failed:", err)
+	}
+	username = sess.Get("username")
+	if username != nil {
+		t.Fatal("flush failed")
+	}
+	password = sess.Get("password")
+	if password != nil {
+		t.Fatal("flush failed")
+	}
+
+	sess.SessionRelease(w)
+
+}