redis: Update style

To match the s3 middleware.

redis/middleware.go

@@ -2,10 +2,9 @@ package redis
 
 import (
 	"context"
-	"errors"
 	"net/http"
 
-	goRedis "github.com/go-redis/redis/v8"
+	"github.com/go-redis/redis/v8"
 )
 
 var redisCtxKey = &contextKey{"redis"}
@@ -14,23 +13,24 @@ type contextKey struct {
 	name string
 }
 
-func Middleware(client *goRedis.Client) func(http.Handler) http.Handler {
+func Middleware(client *redis.Client) func(http.Handler) http.Handler {
 	return func(next http.Handler) http.Handler {
 		return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
-			r = r.WithContext(Context(r.Context(), client))
+			ctx := Context(r.Context(), client)
+			r = r.WithContext(ctx)
 			next.ServeHTTP(w, r)
 		})
 	}
 }
 
-func Context(ctx context.Context, client *goRedis.Client) context.Context {
+func Context(ctx context.Context, client *redis.Client) context.Context {
 	return context.WithValue(ctx, redisCtxKey, client)
 }
 
-func ForContext(ctx context.Context) *goRedis.Client {
-	raw, ok := ctx.Value(redisCtxKey).(*goRedis.Client)
+func ForContext(ctx context.Context) *redis.Client {
+	raw, ok := ctx.Value(redisCtxKey).(*redis.Client)
 	if !ok {
-		panic(errors.New("Invalid redis context"))
+		panic("Invalid redis context")
 	}
 	return raw
 }