fix #1650 - add support for Buffer in some commands, add GET_BUFFER command

lib/client.spec.ts

@@ -195,6 +195,13 @@ describe('Client', () => {
             assert.equal(await client.sendCommand(['PING']), 'PONG');
         });
 
+        itWithClient(TestRedisServers.OPEN, 'bufferMode', async client => {
+            assert.deepEqual(
+                await client.sendCommand(['PING'], undefined, true),
+                Buffer.from('PONG')
+            );
+        });
+
         describe('AbortController', () => {
             before(function () {
                 if (!global.AbortController) {

lib/client.ts

@@ -1,6 +1,6 @@
 import RedisSocket, { RedisSocketOptions } from './socket';
 import RedisCommandsQueue, { PubSubListener, PubSubSubscribeCommands, PubSubUnsubscribeCommands, QueueCommandOptions } from './commands-queue';
-import COMMANDS from './commands';
+import COMMANDS, { TransformArgumentsReply } from './commands';
 import { RedisCommand, RedisModules, RedisReply } from './commands';
 import RedisMultiCommand, { MultiQueuedCommand, RedisMultiCommandType } from './multi-command';
 import EventEmitter from 'events';
@@ -62,12 +62,10 @@ export default class RedisClient<M extends RedisModules = RedisModules, S extend
     ): Promise<ReturnType<typeof command['transformReply']>> {
         const { args: redisArgs, options } = transformCommandArguments<ClientCommandOptions>(command, args);
 
-        const reply = command.transformReply(
+        return command.transformReply(
-            await this.#sendCommand(redisArgs, options),
+            await this.#sendCommand(redisArgs, options, command.BUFFER_MODE),
-            redisArgs.preserve
+            redisArgs.preserve,
         );
-
-        return reply;
     }
 
     static async #scriptsExecutor(
@@ -77,12 +75,10 @@ export default class RedisClient<M extends RedisModules = RedisModules, S extend
     ): Promise<typeof script['transformArguments']> {
         const { args: redisArgs, options } = transformCommandArguments<ClientCommandOptions>(script, args);
 
-        const reply = script.transformReply(
+        return script.transformReply(
-            await this.executeScript(script, redisArgs, options),
+            await this.executeScript(script, redisArgs, options, script.BUFFER_MODE),
             redisArgs.preserve
         );
-
-        return reply;
     }
 
     static create<M extends RedisModules, S extends RedisLuaScripts>(options?: RedisClientOptions<M, S>): RedisClientType<M, S> {
@@ -182,10 +178,7 @@ export default class RedisClient<M extends RedisModules = RedisModules, S extend
     }
 
     #initiateQueue(): RedisCommandsQueue {
-        return new RedisCommandsQueue(
+        return new RedisCommandsQueue(this.#options?.commandsQueueMaxLength);
-            this.#options?.commandsQueueMaxLength,
-            encodedCommands => this.#socket.write(encodedCommands)
-        );
     }
 
     #legacyMode(): void {
@@ -299,7 +292,7 @@ export default class RedisClient<M extends RedisModules = RedisModules, S extend
 
     QUIT(): Promise<void> {
         return this.#socket.quit(() => {
-            const promise = this.#queue.addEncodedCommand(encodeCommand(['QUIT']));
+            const promise = this.#queue.addCommand(['QUIT']);
             this.#tick();
             return promise;
         });
@@ -307,46 +300,64 @@ export default class RedisClient<M extends RedisModules = RedisModules, S extend
 
     quit = this.QUIT;
 
-    sendCommand<T = unknown>(args: Array<string>, options?: ClientCommandOptions): Promise<T> {
+    sendCommand<T = RedisReply>(args: TransformArgumentsReply, options?: ClientCommandOptions, bufferMode?: boolean): Promise<T> {
-        return this.#sendCommand(args, options);
+        return this.#sendCommand(args, options, bufferMode);
     }
 
     // using `#sendCommand` cause `sendCommand` is overwritten in legacy mode
-    #sendCommand<T = RedisReply>(args: Array<string>, options?: ClientCommandOptions): Promise<T> {
+    async #sendCommand<T = RedisReply>(args: TransformArgumentsReply, options?: ClientCommandOptions, bufferMode?: boolean): Promise<T> {
-        return this.sendEncodedCommand(encodeCommand(args), options);
-    }
-
-    async sendEncodedCommand<T = RedisReply>(encodedCommand: string, options?: ClientCommandOptions): Promise<T> {
         if (!this.#socket.isOpen) {
             throw new ClientClosedError();
         }
 
         if (options?.isolated) {
             return this.executeIsolated(isolatedClient =>
-                isolatedClient.sendEncodedCommand(encodedCommand, {
+                isolatedClient.sendCommand(args, {
                     ...options,
                     isolated: false
                 })
             );
         }
 
-        const promise = this.#queue.addEncodedCommand<T>(encodedCommand, options);
+        const promise = this.#queue.addCommand<T>(args, options, bufferMode);
         this.#tick();
         return await promise;
     }
 
+    #tick(): void {
+        if (!this.#socket.isSocketExists) {
+            return;
+        }
+
+        this.#socket.cork();
+
+        while (true) {
+            const args = this.#queue.getCommandToSend();
+            if (args === undefined) break;
+
+            let writeResult;
+            for (const toWrite of encodeCommand(args)) {
+                writeResult = this.#socket.write(toWrite);
+            }
+
+            if (!writeResult) {
+                break;
+            }
+        }
+    }
+
     executeIsolated<T>(fn: (client: RedisClientType<M, S>) => T | Promise<T>): Promise<T> {
         return this.#isolationPool.use(fn);
     }
 
-    async executeScript(script: RedisLuaScript, args: Array<string>, options?: ClientCommandOptions): Promise<ReturnType<typeof script['transformReply']>> {
+    async executeScript(script: RedisLuaScript, args: TransformArgumentsReply, options?: ClientCommandOptions, bufferMode?: boolean): Promise<ReturnType<typeof script['transformReply']>> {
         try {
             return await this.#sendCommand([
                 'EVALSHA',
                 script.SHA1,
                 script.NUMBER_OF_KEYS.toString(),
                 ...args
-            ], options);
+            ], options, bufferMode);
         } catch (err: any) {
             if (!err?.message?.startsWith?.('NOSCRIPT')) {
                 throw err;
@@ -357,14 +368,14 @@ export default class RedisClient<M extends RedisModules = RedisModules, S extend
                 script.SCRIPT,
                 script.NUMBER_OF_KEYS.toString(),
                 ...args
-            ], options);
+            ], options, bufferMode);
         }
     }
 
     #multiExecutor(commands: Array<MultiQueuedCommand>, chainId?: symbol): Promise<Array<RedisReply>> {
         const promise = Promise.all(
-            commands.map(({encodedCommand}) => {
+            commands.map(({ args }) => {
-                return this.#queue.addEncodedCommand(encodedCommand, RedisClient.commandOptions({
+                return this.#queue.addCommand(args, RedisClient.commandOptions({
                     chainId
                 }));
             })
@@ -438,31 +449,6 @@ export default class RedisClient<M extends RedisModules = RedisModules, S extend
         await this.#isolationPool.drain();
         await this.#isolationPool.clear();
     }
-
-    #isTickQueued = false;
-
-    #tick(): void {
-        const {chunkRecommendedSize} = this.#socket;
-        if (!chunkRecommendedSize) {
-            return;
-        }
-
-        if (!this.#isTickQueued && this.#queue.waitingToBeSentCommandsLength < chunkRecommendedSize) {
-            queueMicrotask(() => this.#tick());
-            this.#isTickQueued = true;
-            return;
-        }
-
-        const isBuffering = this.#queue.executeChunk(chunkRecommendedSize);
-        if (isBuffering === true) {
-            this.#socket.once('drain', () => this.#tick());
-        } else if (isBuffering === false) {
-            this.#tick();
-            return;
-        }
-
-        this.#isTickQueued = false;
-    }
 }
 
 extendWithDefaultCommands(RedisClient, RedisClient.commandsExecutor);

lib/cluster-slots.ts

@@ -172,7 +172,7 @@ export default class RedisClusterSlots<M extends RedisModules, S extends RedisLu
         return value.client;
     }
 
-    getClient(firstKey?: string, isReadonly?: boolean): RedisClientType<M, S> {
+    getClient(firstKey?: string | Buffer, isReadonly?: boolean): RedisClientType<M, S> {
         if (!firstKey) {
             return this.#getRandomClient();
         }

lib/cluster.ts

@@ -1,4 +1,4 @@
-import { RedisCommand, RedisModules } from './commands';
+import { RedisCommand, RedisModules, TransformArgumentsReply } from './commands';
 import RedisClient, { ClientCommandOptions, RedisClientType, WithPlugins } from './client';
 import { RedisSocketOptions } from './socket';
 import RedisClusterSlots, { ClusterNode } from './cluster-slots';
@@ -6,6 +6,7 @@ import { RedisLuaScript, RedisLuaScripts } from './lua-script';
 import { extendWithModulesAndScripts, extendWithDefaultCommands, transformCommandArguments } from './commander';
 import RedisMultiCommand, { MultiQueuedCommand, RedisMultiCommandType } from './multi-command';
 import { EventEmitter } from 'events';
+import cluster from 'cluster';
 
 export interface RedisClusterOptions<M = RedisModules, S = RedisLuaScripts> {
     rootNodes: Array<RedisSocketOptions>;
@@ -19,7 +20,7 @@ export type RedisClusterType<M extends RedisModules, S extends RedisLuaScripts>
     WithPlugins<M, S> & RedisCluster;
 
 export default class RedisCluster<M extends RedisModules = RedisModules, S extends RedisLuaScripts = RedisLuaScripts> extends EventEmitter {
-    static #extractFirstKey(command: RedisCommand, originalArgs: Array<unknown>, redisArgs: Array<string>): string | undefined {
+    static #extractFirstKey(command: RedisCommand, originalArgs: Array<unknown>, redisArgs: TransformArgumentsReply): string | Buffer | undefined {
         if (command.FIRST_KEY_INDEX === undefined) {
             return undefined;
         } else if (typeof command.FIRST_KEY_INDEX === 'number') {
@@ -41,7 +42,8 @@ export default class RedisCluster<M extends RedisModules = RedisModules, S exten
                 RedisCluster.#extractFirstKey(command, args, redisArgs),
                 command.IS_READ_ONLY,
                 redisArgs,
-                options
+                options,
+                command.BUFFER_MODE
             ),
             redisArgs.preserve
         );
@@ -100,22 +102,23 @@ export default class RedisCluster<M extends RedisModules = RedisModules, S exten
     }
 
     async sendCommand<C extends RedisCommand>(
-        firstKey: string | undefined,
+        firstKey: string | Buffer | undefined,
         isReadonly: boolean | undefined,
-        args: Array<string>,
+        args: TransformArgumentsReply,
         options?: ClientCommandOptions,
+        bufferMode?: boolean,
         redirections = 0
     ): Promise<ReturnType<C['transformReply']>> {
         const client = this.#slots.getClient(firstKey, isReadonly);
 
         try {
-            return await client.sendCommand(args, options);
+            return await client.sendCommand(args, options, bufferMode);
         } catch (err: any) {
             const shouldRetry = await this.#handleCommandError(err, client, redirections);
             if (shouldRetry === true) {
-                return this.sendCommand(firstKey, isReadonly, args, options, redirections + 1);
+                return this.sendCommand(firstKey, isReadonly, args, options, bufferMode, redirections + 1);
             } else if (shouldRetry) {
-                return shouldRetry.sendCommand(args, options);
+                return shouldRetry.sendCommand(args, options, bufferMode);
             }
 
             throw err;
@@ -125,7 +128,7 @@ export default class RedisCluster<M extends RedisModules = RedisModules, S exten
     async executeScript(
         script: RedisLuaScript,
         originalArgs: Array<unknown>,
-        redisArgs: Array<string>,
+        redisArgs: TransformArgumentsReply,
         options?: ClientCommandOptions,
         redirections = 0
     ): Promise<ReturnType<typeof script['transformReply']>> {
@@ -135,13 +138,13 @@ export default class RedisCluster<M extends RedisModules = RedisModules, S exten
         );
 
         try {
-            return await client.executeScript(script, redisArgs, options);
+            return await client.executeScript(script, redisArgs, options, script.BUFFER_MODE);
         } catch (err: any) {
             const shouldRetry = await this.#handleCommandError(err, client, redirections);
             if (shouldRetry === true) {
                 return this.executeScript(script, originalArgs, redisArgs, options, redirections + 1);
             } else if (shouldRetry) {
-                return shouldRetry.executeScript(script, redisArgs, options);
+                return shouldRetry.executeScript(script, redisArgs, options, script.BUFFER_MODE);
             }
 
             throw err;
@@ -181,8 +184,8 @@ export default class RedisCluster<M extends RedisModules = RedisModules, S exten
                 const client = this.#slots.getClient(routing);
 
                 return Promise.all(
-                    commands.map(({encodedCommand}) => {
+                    commands.map(({ args }) => {
-                        return client.sendEncodedCommand(encodedCommand, RedisClient.commandOptions({
+                        return client.sendCommand(args, RedisClient.commandOptions({
                             chainId
                         }));
                     })

lib/commander.spec.ts

@@ -2,27 +2,43 @@ import { strict as assert } from 'assert';
 import { describe } from 'mocha';
 import { encodeCommand } from './commander';
 
+function encodeCommandToString(...args: Parameters<typeof encodeCommand>): string {
+    const arr = [];
+    for (const item of encodeCommand(...args)) {
+        arr.push(item.toString());
+    }
+
+    return arr.join('');
+}
+
 describe('Commander', () => {
     describe('encodeCommand (see #1628)', () => {
         it('1 byte', () => {
             assert.equal(
-                encodeCommand(['a', 'z']),
+                encodeCommandToString(['a', 'z']),
                 '*2\r\n$1\r\na\r\n$1\r\nz\r\n'
             );
         });
 
         it('2 bytes', () => {
             assert.equal(
-                encodeCommand(['א', 'ת']),
+                encodeCommandToString(['א', 'ת']),
                 '*2\r\n$2\r\nא\r\n$2\r\nת\r\n'
             );
         });
 
         it('4 bytes', () => {
             assert.equal(
-                encodeCommand(['🐣', '🐤']),
+                encodeCommandToString(['🐣', '🐤']),
                 '*2\r\n$4\r\n🐣\r\n$4\r\n🐤\r\n'
             );
         });
+
+        it('with a buffer', () => {
+            assert.equal(
+                encodeCommandToString([Buffer.from('string')]),
+                '*1\r\n$6\r\nstring\r\n'
+            );
+        });
     });
 });

lib/commander.ts

@@ -2,6 +2,7 @@
 import COMMANDS, { RedisCommand, RedisModules, TransformArgumentsReply } from './commands';
 import { RedisLuaScript, RedisLuaScripts } from './lua-script';
 import { CommandOptions, isCommandOptions } from './command-options';
+import { off } from 'process';
 
 type Instantiable<T = any> = new(...args: Array<any>) => T;
 
@@ -94,16 +95,15 @@ export function transformCommandArguments<T = unknown>(
     };
 }
 
-export function encodeCommand(args: Array<string>): string {
+const DELIMITER = '\r\n';
-    const encoded = [
-        `*${args.length}`,
-        `$${Buffer.byteLength(args[0]).toString()}`,
-        args[0]
-    ];
 
-    for (let i = 1; i < args.length; i++) {
+export function* encodeCommand(args: TransformArgumentsReply): IterableIterator<string | Buffer> {
-        encoded.push(`$${Buffer.byteLength(args[i]).toString()}`, args[i]);
+    yield `*${args.length}${DELIMITER}`;
+
+    for (const arg of args) {
+        const byteLength = typeof arg === 'string' ? Buffer.byteLength(arg): arg.length;
+        yield `$${byteLength.toString()}${DELIMITER}`;
+        yield arg;
+        yield DELIMITER;
     }
-
-    return encoded.join('\r\n') + '\r\n';
 }

lib/commands-queue.ts

@@ -2,17 +2,15 @@ import LinkedList from 'yallist';
 import RedisParser from 'redis-parser';
 import { AbortError } from './errors';
 import { RedisReply } from './commands';
-import { encodeCommand } from './commander';
 
 export interface QueueCommandOptions {
     asap?: boolean;
-    signal?: any; // TODO: `AbortSignal` type is incorrect
     chainId?: symbol;
+    signal?: any; // TODO: `AbortSignal` type is incorrect
 }
 
 interface CommandWaitingToBeSent extends CommandWaitingForReply {
-    encodedCommand: string;
+    args: Array<string | Buffer>;
-    byteLength: number;
     chainId?: symbol;
     abort?: {
         signal: any; // TODO: `AbortSignal` type is incorrect
@@ -24,10 +22,9 @@ interface CommandWaitingForReply {
     resolve(reply?: any): void;
     reject(err: Error): void;
     channelsCounter?: number;
+    bufferMode?: boolean;
 }
 
-export type CommandsQueueExecutor = (encodedCommands: string) => boolean | undefined;
-
 export enum PubSubSubscribeCommands {
     SUBSCRIBE = 'SUBSCRIBE',
     PSUBSCRIBE = 'PSUBSCRIBE'
@@ -57,16 +54,8 @@ export default class RedisCommandsQueue {
 
     readonly #maxLength: number | null | undefined;
 
-    readonly #executor: CommandsQueueExecutor;
-
     readonly #waitingToBeSent = new LinkedList<CommandWaitingToBeSent>();
 
-    #waitingToBeSentCommandsLength = 0;
-
-    get waitingToBeSentCommandsLength() {
-        return this.#waitingToBeSentCommandsLength;
-    }
-
     readonly #waitingForReply = new LinkedList<CommandWaitingForReply>();
 
     readonly #pubSubState = {
@@ -114,12 +103,11 @@ export default class RedisCommandsQueue {
 
     #chainInExecution: symbol | undefined;
 
-    constructor(maxLength: number | null | undefined, executor: CommandsQueueExecutor) {
+    constructor(maxLength: number | null | undefined) {
         this.#maxLength = maxLength;
-        this.#executor = executor;
     }
 
-    addEncodedCommand<T = RedisReply>(encodedCommand: string, options?: QueueCommandOptions): Promise<T> {
+    addCommand<T = RedisReply>(args: Array<string | Buffer>, options?: QueueCommandOptions, bufferMode?: boolean): Promise<T> {
         if (this.#pubSubState.subscribing || this.#pubSubState.subscribed) {
             return Promise.reject(new Error('Cannot send commands in PubSub mode'));
         } else if (this.#maxLength && this.#waitingToBeSent.length + this.#waitingForReply.length >= this.#maxLength) {
@@ -130,11 +118,11 @@ export default class RedisCommandsQueue {
 
         return new Promise((resolve, reject) => {
             const node = new LinkedList.Node<CommandWaitingToBeSent>({
-                encodedCommand,
+                args,
-                byteLength: Buffer.byteLength(encodedCommand),
                 chainId: options?.chainId,
+                bufferMode,
                 resolve,
-                reject
+                reject,
             });
 
             if (options?.signal) {
@@ -157,8 +145,6 @@ export default class RedisCommandsQueue {
             } else {
                 this.#waitingToBeSent.pushNode(node);
             }
-
-            this.#waitingToBeSentCommandsLength += node.value.byteLength;
         });
     }
 
@@ -233,11 +219,8 @@ export default class RedisCommandsQueue {
 
             this.#pubSubState[inProgressKey] += channelsCounter;
 
-            const encodedCommand = encodeCommand(commandArgs),
-                byteLength = Buffer.byteLength(encodedCommand);
             this.#waitingToBeSent.push({
-                encodedCommand,
+                args: commandArgs,
-                byteLength,
                 channelsCounter,
                 resolve: () => {
                     this.#pubSubState[inProgressKey] -= channelsCounter;
@@ -249,7 +232,6 @@ export default class RedisCommandsQueue {
                     reject();
                 }
             });
-            this.#waitingToBeSentCommandsLength += byteLength;
         });
     }
 
@@ -267,47 +249,25 @@ export default class RedisCommandsQueue {
         ]);
     }
 
-    executeChunk(recommendedSize: number): boolean | undefined {
+    getCommandToSend(): Array<string | Buffer> | undefined {
-        if (!this.#waitingToBeSent.length) return;
+        const toSend = this.#waitingToBeSent.shift();
-
-        const encoded: Array<string> = [];
-        let size = 0,
-            lastCommandChainId: symbol | undefined;
-        for (const command of this.#waitingToBeSent) {
-            encoded.push(command.encodedCommand);
-            size += command.byteLength;
-            if (size > recommendedSize) {
-                lastCommandChainId = command.chainId;
-                break;
-            }
-        }
-
-        if (!lastCommandChainId && encoded.length === this.#waitingToBeSent.length) {
-            lastCommandChainId = this.#waitingToBeSent.tail!.value.chainId;
-        }
-
-        lastCommandChainId ??= this.#waitingToBeSent.tail?.value.chainId;
-
-        this.#executor(encoded.join(''));
-
-        for (let i = 0; i < encoded.length; i++) {
-            const waitingToBeSent = this.#waitingToBeSent.shift()!;
-            if (waitingToBeSent.abort) {
-                waitingToBeSent.abort.signal.removeEventListener('abort', waitingToBeSent.abort.listener);
-            }
 
+        if (toSend) {
             this.#waitingForReply.push({
-                resolve: waitingToBeSent.resolve,
+                resolve: toSend.resolve,
-                reject: waitingToBeSent.reject,
+                reject: toSend.reject,
-                channelsCounter: waitingToBeSent.channelsCounter
+                channelsCounter: toSend.channelsCounter,
+                bufferMode: toSend.bufferMode
             });
         }
 
-        this.#chainInExecution = lastCommandChainId;
+        this.#chainInExecution = toSend?.chainId;
-        this.#waitingToBeSentCommandsLength -= size;
+
+        return toSend?.args;
     }
 
     parseResponse(data: Buffer): void {
+        this.#parser.setReturnBuffers(!!this.#waitingForReply.head?.value.bufferMode);
         this.#parser.execute(data);
     }
 

lib/commands/ACL_DELUSER.ts

@@ -1,6 +1,7 @@
+import { TransformArgumentsReply } from '.';
 import { pushVerdictArguments, transformReplyNumber } from './generic-transformers';
 
-export function transformArguments(username: string | Array<string>): Array<string> {
+export function transformArguments(username: string | Array<string>): TransformArgumentsReply {
     return pushVerdictArguments(['ACL', 'DELUSER'], username);
 }
 

lib/commands/ACL_SETUSER.ts

@@ -1,6 +1,7 @@
+import { TransformArgumentsReply } from '.';
 import { pushVerdictArguments, transformReplyString } from './generic-transformers';
 
-export function transformArguments(username: string, rule: string | Array<string>): Array<string> {
+export function transformArguments(username: string, rule: string | Array<string>): TransformArgumentsReply {
     return pushVerdictArguments(['ACL', 'SETUSER', username], rule);
 }
 

lib/commands/BITOP.ts

@@ -1,10 +1,11 @@
+import { TransformArgumentsReply } from '.';
 import { pushVerdictArguments, transformReplyNumber } from './generic-transformers';
 
 export const FIRST_KEY_INDEX = 2;
 
 type BitOperations = 'AND' | 'OR' | 'XOR' | 'NOT';
 
-export function transformArguments(operation: BitOperations, destKey: string, key: string | Array<string>): Array<string> {
+export function transformArguments(operation: BitOperations, destKey: string, key: string | Array<string>): TransformArgumentsReply {
     return pushVerdictArguments(['BITOP', operation, destKey], key);
 }
 

lib/commands/BLPOP.ts

@@ -1,8 +1,9 @@
+import { TransformArgumentsReply } from '.';
 import { pushVerdictArguments } from './generic-transformers';
 
 export const FIRST_KEY_INDEX = 1;
 
-export function transformArguments(keys: string | Array<string>, timeout: number): Array<string> {
+export function transformArguments(keys: string | Buffer | Array<string | Buffer>, timeout: number): TransformArgumentsReply {
     const args = pushVerdictArguments(['BLPOP'], keys);
 
     args.push(timeout.toString());

lib/commands/BRPOP.ts

@@ -1,8 +1,9 @@
+import { TransformArgumentsReply } from '.';
 import { pushVerdictArguments } from './generic-transformers';
 
 export const FIRST_KEY_INDEX = 1;
 
-export function transformArguments(key: string | Array<string>, timeout: number): Array<string> {
+export function transformArguments(key: string | Array<string>, timeout: number): TransformArgumentsReply {
     const args = pushVerdictArguments(['BRPOP'], key);
 
     args.push(timeout.toString());

lib/commands/BZPOPMAX.ts

@@ -1,8 +1,9 @@
+import { TransformArgumentsReply } from '.';
 import { pushVerdictArguments, transformReplyNumberInfinity, ZMember } from './generic-transformers';
 
 export const FIRST_KEY_INDEX = 1;
 
-export function transformArguments(key: string | Array<string>, timeout: number): Array<string> {
+export function transformArguments(key: string | Array<string>, timeout: number): TransformArgumentsReply {
     const args = pushVerdictArguments(['BZPOPMAX'], key);
 
     args.push(timeout.toString());

lib/commands/BZPOPMIN.ts

@@ -1,8 +1,9 @@
+import { TransformArgumentsReply } from '.';
 import { pushVerdictArguments, transformReplyNumberInfinity, ZMember } from './generic-transformers';
 
 export const FIRST_KEY_INDEX = 1;
 
-export function transformArguments(key: string | Array<string>, timeout: number): Array<string> {
+export function transformArguments(key: string | Array<string>, timeout: number): TransformArgumentsReply {
     const args = pushVerdictArguments(['BZPOPMIN'], key);
 
     args.push(timeout.toString());

lib/commands/DEL.ts

@@ -1,6 +1,7 @@
+import { TransformArgumentsReply } from '.';
 import { pushVerdictArguments, transformReplyNumber } from './generic-transformers';
 
-export function transformArguments(keys: string | Array<string>): Array<string> {
+export function transformArguments(keys: string | Array<string>): TransformArgumentsReply {
     return pushVerdictArguments(['DEL'], keys);
 }
 

lib/commands/EXISTS.ts

@@ -1,10 +1,11 @@
+import { TransformArgumentsReply } from '.';
 import { pushVerdictArguments, transformReplyBoolean } from './generic-transformers';
 
 export const FIRST_KEY_INDEX = 1;
 
 export const IS_READ_ONLY = true;
 
-export function transformArguments(keys: string | Array<string>): Array<string> {
+export function transformArguments(keys: string | Array<string>): TransformArgumentsReply {
     return pushVerdictArguments(['EXISTS'], keys);
 }
 

lib/commands/GEOHASH.ts

@@ -1,10 +1,11 @@
+import { TransformArgumentsReply } from '.';
 import { pushVerdictArguments, transformReplyStringArray } from './generic-transformers';
 
 export const FIRST_KEY_INDEX = 1;
 
 export const IS_READ_ONLY = true;
 
-export function transformArguments(key: string, member: string | Array<string>): Array<string> {
+export function transformArguments(key: string, member: string | Array<string>): TransformArgumentsReply {
     return pushVerdictArguments(['GEOHASH', key], member);
 }
 

lib/commands/GEOPOS.ts

@@ -1,10 +1,11 @@
+import { TransformArgumentsReply } from '.';
 import { pushVerdictArguments } from './generic-transformers';
 
 export const FIRST_KEY_INDEX = 1;
 
 export const IS_READ_ONLY = true;
 
-export function transformArguments(key: string, member: string | Array<string>): Array<string> {
+export function transformArguments(key: string, member: string | Array<string>): TransformArgumentsReply {
     return pushVerdictArguments(['GEOPOS', key], member);
 }
 

lib/commands/GET.ts

@@ -1,10 +1,11 @@
+import { TransformArgumentsReply } from '.';
 import { transformReplyString } from './generic-transformers';
 
 export const FIRST_KEY_INDEX = 1;
 
 export const IS_READ_ONLY = true;
 
-export function transformArguments(key: string): Array<string> {
+export function transformArguments(key: string | Buffer): TransformArgumentsReply {
     return ['GET', key];
 }
 

lib/commands/GET_BUFFER.spec.ts

@@ -0,0 +1,22 @@
+import { strict as assert } from 'assert';
+import { TestRedisServers, itWithClient, TestRedisClusters, itWithCluster } from '../test-utils';
+
+describe('GET_BUFFER', () => {
+    itWithClient(TestRedisServers.OPEN, 'client.getBuffer', async client => {
+        const buffer = Buffer.from('string');
+        await client.set('key', buffer);
+        assert.deepEqual(
+            buffer,
+            await client.getBuffer('key')
+        );
+    });
+
+    itWithCluster(TestRedisClusters.OPEN, 'cluster.getBuffer', async cluster => {
+        const buffer = Buffer.from('string');
+        await cluster.set('key', buffer);
+        assert.deepEqual(
+            buffer,
+            await cluster.getBuffer('key')
+        );
+    });
+});

lib/commands/GET_BUFFER.ts

@@ -0,0 +1,7 @@
+import { transformReplyBuffer } from './generic-transformers';
+
+export { FIRST_KEY_INDEX, IS_READ_ONLY, transformArguments } from './GET';
+
+export const BUFFER_MODE = true;
+
+export const transformReply = transformReplyBuffer;

lib/commands/HDEL.ts

@@ -1,8 +1,9 @@
+import { TransformArgumentsReply } from '.';
 import { pushVerdictArguments, transformReplyNumber } from './generic-transformers';
 
 export const FIRST_KEY_INDEX = 1;
 
-export function transformArguments(key: string, field: string | Array<string>): Array<string> {
+export function transformArguments(key: string, field: string | Array<string>): TransformArgumentsReply {
     return pushVerdictArguments(['HDEL', key], field);
 }
 

lib/commands/HMGET.ts

@@ -1,10 +1,11 @@
+import { TransformArgumentsReply } from '.';
 import { pushVerdictArguments, transformReplyStringArray } from './generic-transformers';
 
 export const FIRST_KEY_INDEX = 1;
 
 export const IS_READ_ONLY = true;
 
-export function transformArguments(key: string, fields: string | Array<string>): Array<string> {
+export function transformArguments(key: string, fields: string | Array<string>): TransformArgumentsReply {
     return pushVerdictArguments(['HMGET', key], fields);
 }
 

lib/commands/LPUSH.ts

@@ -1,8 +1,9 @@
+import { TransformArgumentsReply } from '.';
 import { pushVerdictArguments, transformReplyNumber } from './generic-transformers';
 
 export const FIRST_KEY_INDEX = 1;
 
-export function transformArguments(key: string, elements: string | Array<string>): Array<string> {
+export function transformArguments(key: string, elements: string | Array<string>): TransformArgumentsReply {
     return pushVerdictArguments(['LPUSH', key], elements);}
 
 export const transformReply = transformReplyNumber;

lib/commands/LPUSHX.ts

@@ -1,8 +1,9 @@
+import { TransformArgumentsReply } from '.';
 import { pushVerdictArguments, transformReplyNumber } from './generic-transformers';
 
 export const FIRST_KEY_INDEX = 1;
 
-export function transformArguments(key: string, element: string | Array<string>): Array<string> {
+export function transformArguments(key: string, element: string | Array<string>): TransformArgumentsReply {
     return pushVerdictArguments(['LPUSHX', key], element);
 }
 

lib/commands/PFADD.ts

@@ -1,8 +1,9 @@
+import { TransformArgumentsReply } from '.';
 import { pushVerdictArguments, transformReplyBoolean } from './generic-transformers';
 
 export const FIRST_KEY_INDEX = 1;
 
-export function transformArguments(key: string, element: string | Array<string>): Array<string> {
+export function transformArguments(key: string, element: string | Array<string>): TransformArgumentsReply {
     return pushVerdictArguments(['PFADD', key], element);
 }
 

lib/commands/PFCOUNT.ts

@@ -1,8 +1,9 @@
+import { TransformArgumentsReply } from '.';
 import { pushVerdictArguments, transformReplyNumber } from './generic-transformers';
 
 export const FIRST_KEY_INDEX = 1;
 
-export function transformArguments(key: string | Array<string>): Array<string> {
+export function transformArguments(key: string | Array<string>): TransformArgumentsReply {
     return pushVerdictArguments(['PFCOUNT'], key);
 }
 

lib/commands/PFMERGE.ts

@@ -1,8 +1,9 @@
+import { TransformArgumentsReply } from '.';
 import { pushVerdictArguments, transformReplyString } from './generic-transformers';
 
 export const FIRST_KEY_INDEX = 1;
 
-export function transformArguments(destination: string, source: string | Array<string>): Array<string> {
+export function transformArguments(destination: string, source: string | Array<string>): TransformArgumentsReply {
     return pushVerdictArguments(['PFMERGE', destination], source);
 }
 

lib/commands/RPUSH.ts

@@ -1,8 +1,9 @@
+import { TransformArgumentsReply } from '.';
 import { pushVerdictArguments, transformReplyNumber } from './generic-transformers';
 
 export const FIRST_KEY_INDEX = 1;
 
-export function transformArguments(key: string, element: string | Array<string>): Array<string> {
+export function transformArguments(key: string, element: string | Array<string>): TransformArgumentsReply {
     return pushVerdictArguments(['RPUSH', key], element);
 }
 

lib/commands/RPUSHX.ts

@@ -1,8 +1,9 @@
+import { TransformArgumentsReply } from '.';
 import { pushVerdictArguments, transformReplyNumber } from './generic-transformers';
 
 export const FIRST_KEY_INDEX = 1;
 
-export function transformArguments(key: string, element: string | Array<string>): Array<string> {
+export function transformArguments(key: string, element: string | Array<string>): TransformArgumentsReply {
     return pushVerdictArguments(['RPUSHX', key], element);
 }
 

lib/commands/SADD.ts

@@ -1,8 +1,9 @@
+import { TransformArgumentsReply } from '.';
 import { pushVerdictArguments, transformReplyNumber } from './generic-transformers';
 
 export const FIRST_KEY_INDEX = 1;
 
-export function transformArguments(key: string, members: string | Array<string>): Array<string> {
+export function transformArguments(key: string, members: string | Array<string>): TransformArgumentsReply {
     return pushVerdictArguments(['SADD', key], members);
 }
 

lib/commands/SCRIPT_EXISTS.ts

@@ -1,6 +1,7 @@
+import { TransformArgumentsReply } from '.';
 import { pushVerdictArguments, transformReplyBooleanArray } from './generic-transformers';
 
-export function transformArguments(sha1: string | Array<string>): Array<string> {
+export function transformArguments(sha1: string | Array<string>): TransformArgumentsReply {
     return pushVerdictArguments(['SCRIPT', 'EXISTS'], sha1);
 }
 

lib/commands/SDIFF.ts

@@ -1,8 +1,9 @@
+import { TransformArgumentsReply } from '.';
 import { pushVerdictArguments, transformReplyStringArray } from './generic-transformers';
 
 export const FIRST_KEY_INDEX = 1;
 
-export function transformArguments(keys: string | Array<string>): Array<string> {
+export function transformArguments(keys: string | Array<string>): TransformArgumentsReply {
     return pushVerdictArguments(['SDIFF'], keys);
 }
 

lib/commands/SDIFFSTORE.ts

@@ -1,8 +1,9 @@
+import { TransformArgumentsReply } from '.';
 import { pushVerdictArguments, transformReplyNumber } from './generic-transformers';
 
 export const FIRST_KEY_INDEX = 1;
 
-export function transformArguments(destination: string, keys: string | Array<string>): Array<string> {
+export function transformArguments(destination: string, keys: string | Array<string>): TransformArgumentsReply {
     return pushVerdictArguments(['SDIFFSTORE', destination], keys);
 }
 

lib/commands/SET.ts

@@ -1,3 +1,5 @@
+import { TransformArgumentsReply } from '.';
+
 export const FIRST_KEY_INDEX = 1;
 
 interface EX {
@@ -38,7 +40,7 @@ interface SetCommonOptions {
 
 type SetOptions = SetTTL & SetGuards & (SetCommonOptions | {});
 
-export function transformArguments(key: string, value: string, options?: SetOptions): Array<string> {
+export function transformArguments(key: string | Buffer, value: string | Buffer, options?: SetOptions): TransformArgumentsReply {
     const args = ['SET', key, value];
 
     if (!options) {

lib/commands/SETEX.ts

@@ -1,8 +1,9 @@
+import { TransformArgumentsReply } from '.';
 import { transformReplyString } from './generic-transformers';
 
 export const FIRST_KEY_INDEX = 1;
 
-export function transformArguments(key: string, seconds: number, value: string): Array<string> {
+export function transformArguments(key: string | Buffer, seconds: number, value: string): TransformArgumentsReply {
     return [
         'SETEX',
         key,

lib/commands/SINTER.ts

@@ -1,8 +1,9 @@
+import { TransformArgumentsReply } from '.';
 import { pushVerdictArguments, transformReplyStringArray } from './generic-transformers';
 
 export const FIRST_KEY_INDEX = 1;
 
-export function transformArguments(keys: string | Array<string>): Array<string> {
+export function transformArguments(keys: string | Array<string>): TransformArgumentsReply {
     return pushVerdictArguments(['SINTER'], keys);
 }
 

lib/commands/SINTERSTORE.ts

@@ -1,8 +1,9 @@
+import { TransformArgumentsReply } from '.';
 import { pushVerdictArguments, transformReplyStringArray } from './generic-transformers';
 
 export const FIRST_KEY_INDEX = 1;
 
-export function transformArguments(destination: string, keys: string | Array<string>): Array<string> {
+export function transformArguments(destination: string, keys: string | Array<string>): TransformArgumentsReply {
     return pushVerdictArguments(['SINTERSTORE', destination], keys);
 }
 

lib/commands/SREM.ts

@@ -1,8 +1,9 @@
+import { TransformArgumentsReply } from '.';
 import { pushVerdictArguments, transformReplyNumber } from './generic-transformers';
 
 export const FIRST_KEY_INDEX = 1;
 
-export function transformArguments(key: string, members: string | Array<string>): Array<string> {
+export function transformArguments(key: string, members: string | Array<string>): TransformArgumentsReply {
     return pushVerdictArguments(['SREM', key], members);
 }
 

lib/commands/SUNION.ts

@@ -1,10 +1,11 @@
+import { TransformArgumentsReply } from '.';
 import { pushVerdictArguments, transformReplyStringArray } from './generic-transformers';
 
 export const FIRST_KEY_INDEX = 1;
 
 export const IS_READ_ONLY = true;
 
-export function transformArguments(keys: string | Array<string>): Array<string> {
+export function transformArguments(keys: string | Array<string>): TransformArgumentsReply {
     return pushVerdictArguments(['SUNION'], keys);
 }
 

lib/commands/SUNIONSTORE.ts

@@ -1,8 +1,9 @@
+import { TransformArgumentsReply } from '.';
 import { pushVerdictArguments, transformReplyNumber } from './generic-transformers';
 
 export const FIRST_KEY_INDEX = 1;
 
-export function transformArguments(destination: string, keys: string | Array<string>): Array<string> {
+export function transformArguments(destination: string, keys: string | Array<string>): TransformArgumentsReply {
     return pushVerdictArguments(['SUNIONSTORE', destination], keys);
 }
 

lib/commands/TOUCH.ts

@@ -1,8 +1,9 @@
+import { TransformArgumentsReply } from '.';
 import { pushVerdictArguments, transformReplyNumber } from './generic-transformers';
 
 export const FIRST_KEY_INDEX = 1;
 
-export function transformArguments(key: string | Array<string>): Array<string> {
+export function transformArguments(key: string | Array<string>): TransformArgumentsReply {
     return pushVerdictArguments(['TOUCH'], key);
 }
 

lib/commands/UNLINK.ts

@@ -1,8 +1,9 @@
+import { TransformArgumentsReply } from '.';
 import { pushVerdictArguments, transformReplyNumber } from './generic-transformers';
 
 export const FIRST_KEY_INDEX = 1;
 
-export function transformArguments(key: string | Array<string>): Array<string> {
+export function transformArguments(key: string | Array<string>): TransformArgumentsReply {
     return pushVerdictArguments(['UNLINK'], key);
 }
 

lib/commands/WATCH.ts

@@ -1,6 +1,7 @@
+import { TransformArgumentsReply } from '.';
 import { pushVerdictArguments, transformReplyString } from './generic-transformers';
 
-export function transformArguments(key: string | Array<string>): Array<string> {
+export function transformArguments(key: string | Array<string>): TransformArgumentsReply {
     return pushVerdictArguments(['WATCH'], key);
 }
 

lib/commands/XACK.ts

@@ -1,8 +1,9 @@
+import { TransformArgumentsReply } from '.';
 import { pushVerdictArguments, transformReplyNumber } from './generic-transformers';
 
 export const FIRST_KEY_INDEX = 1;
 
-export function transformArguments(key: string, group: string, id: string | Array<string>): Array<string> {
+export function transformArguments(key: string, group: string, id: string | Array<string>): TransformArgumentsReply {
     return pushVerdictArguments(['XACK', key, group], id);
 }
 

lib/commands/XDEL.ts

@@ -1,8 +1,9 @@
+import { TransformArgumentsReply } from '.';
 import { pushVerdictArguments, transformReplyNumber } from './generic-transformers';
 
 export const FIRST_KEY_INDEX = 1;
 
-export function transformArguments(key: string, id: string | Array<string>): Array<string> {
+export function transformArguments(key: string, id: string | Array<string>): TransformArgumentsReply {
     return pushVerdictArguments(['XDEL', key], id);
 }
 

lib/commands/ZDIFF.ts

@@ -1,10 +1,11 @@
+import { TransformArgumentsReply } from '.';
 import { pushVerdictArgument, transformReplyStringArray } from './generic-transformers';
 
 export const FIRST_KEY_INDEX = 2;
 
 export const IS_READ_ONLY = true;
 
-export function transformArguments(keys: Array<string> | string): Array<string> {
+export function transformArguments(keys: Array<string> | string): TransformArgumentsReply {
     return pushVerdictArgument(['ZDIFF'], keys);
 }
 

lib/commands/ZDIFFSTORE.ts

@@ -1,8 +1,9 @@
+import { TransformArgumentsReply } from '.';
 import { pushVerdictArgument, transformReplyNumber } from './generic-transformers';
 
 export const FIRST_KEY_INDEX = 1;
 
-export function transformArguments(destination: string, keys: Array<string> | string): Array<string> {
+export function transformArguments(destination: string, keys: Array<string> | string): TransformArgumentsReply {
     return pushVerdictArgument(['ZDIFFSTORE', destination], keys);
 }
 

lib/commands/ZDIFF_WITHSCORES.ts

@@ -1,9 +1,10 @@
+import { TransformArgumentsReply } from '.';
 import { transformReplySortedSetWithScores } from './generic-transformers';
 import { transformArguments as transformZDiffArguments } from './ZDIFF';
 
 export { FIRST_KEY_INDEX, IS_READ_ONLY } from './ZDIFF';
 
-export function transformArguments(...args: Parameters<typeof transformZDiffArguments>): Array<string> {
+export function transformArguments(...args: Parameters<typeof transformZDiffArguments>): TransformArgumentsReply {
     return [
         ...transformZDiffArguments(...args),
         'WITHSCORES'

lib/commands/ZINTER.ts

@@ -1,3 +1,4 @@
+import { TransformArgumentsReply } from '.';
 import { pushVerdictArgument, transformReplyStringArray } from './generic-transformers';
 
 export const FIRST_KEY_INDEX = 2;
@@ -9,7 +10,7 @@ interface ZInterOptions {
     AGGREGATE?: 'SUM' | 'MIN' | 'MAX';
 }
 
-export function transformArguments(keys: Array<string> | string, options?: ZInterOptions): Array<string> {
+export function transformArguments(keys: Array<string> | string, options?: ZInterOptions): TransformArgumentsReply {
     const args = pushVerdictArgument(['ZINTER'], keys);
 
     if (options?.WEIGHTS) {

lib/commands/ZINTERSTORE.ts

@@ -1,3 +1,4 @@
+import { TransformArgumentsReply } from '.';
 import { pushVerdictArgument, transformReplyNumber } from './generic-transformers';
 
 export const FIRST_KEY_INDEX = 1;
@@ -7,7 +8,7 @@ interface ZInterStoreOptions {
     AGGREGATE?: 'SUM' | 'MIN' | 'MAX';
 }
 
-export function transformArguments(destination: string, keys: Array<string> | string, options?: ZInterStoreOptions): Array<string> {
+export function transformArguments(destination: string, keys: Array<string> | string, options?: ZInterStoreOptions): TransformArgumentsReply {
     const args = pushVerdictArgument(['ZINTERSTORE', destination], keys);
 
     if (options?.WEIGHTS) {

lib/commands/ZINTER_WITHSCORES.ts

@@ -1,9 +1,10 @@
+import { TransformArgumentsReply } from '.';
 import { transformReplySortedSetWithScores } from './generic-transformers';
 import { transformArguments as transformZInterArguments } from './ZINTER';
 
 export { FIRST_KEY_INDEX, IS_READ_ONLY } from './ZINTER';
 
-export function transformArguments(...args: Parameters<typeof transformZInterArguments>): Array<string> {
+export function transformArguments(...args: Parameters<typeof transformZInterArguments>): TransformArgumentsReply {
     return [
         ...transformZInterArguments(...args),
         'WITHSCORES'

lib/commands/ZMSCORE.ts

@@ -1,10 +1,11 @@
+import { TransformArgumentsReply } from '.';
 import { pushVerdictArguments, transformReplyNumberInfinityNullArray } from './generic-transformers';
 
 export const FIRST_KEY_INDEX = 1;
 
 export const IS_READ_ONLY = true;
 
-export function transformArguments(key: string, member: string | Array<string>): Array<string> {
+export function transformArguments(key: string, member: string | Array<string>): TransformArgumentsReply {
     return pushVerdictArguments(['ZMSCORE', key], member);
 }
 

lib/commands/ZREM.ts

@@ -1,8 +1,9 @@
+import { TransformArgumentsReply } from '.';
 import { pushVerdictArguments, transformReplyNumber } from './generic-transformers';
 
 export const FIRST_KEY_INDEX = 1;
 
-export function transformArguments(key: string, member: string | Array<string>): Array<string> {
+export function transformArguments(key: string, member: string | Array<string>): TransformArgumentsReply {
     return pushVerdictArguments(['ZREM', key], member);
 }
 

lib/commands/ZUNION.ts

@@ -1,3 +1,4 @@
+import { TransformArgumentsReply } from '.';
 import { pushVerdictArgument, transformReplyStringArray } from './generic-transformers';
 
 export const FIRST_KEY_INDEX = 2;
@@ -9,7 +10,7 @@ interface ZUnionOptions {
     AGGREGATE?: 'SUM' | 'MIN' | 'MAX';
 }
 
-export function transformArguments(keys: Array<string> | string, options?: ZUnionOptions): Array<string> {
+export function transformArguments(keys: Array<string> | string, options?: ZUnionOptions): TransformArgumentsReply {
     const args = pushVerdictArgument(['ZUNION'], keys);
 
     if (options?.WEIGHTS) {

lib/commands/ZUNIONSTORE.ts

@@ -1,3 +1,4 @@
+import { TransformArgumentsReply } from '.';
 import { pushVerdictArgument, transformReplyNumber } from './generic-transformers';
 
 export const FIRST_KEY_INDEX = 1;
@@ -7,7 +8,7 @@ interface ZUnionOptions {
     AGGREGATE?: 'SUM' | 'MIN' | 'MAX';
 }
 
-export function transformArguments(destination: string, keys: Array<string> | string, options?: ZUnionOptions): Array<string> {
+export function transformArguments(destination: string, keys: Array<string> | string, options?: ZUnionOptions): TransformArgumentsReply {
     const args = pushVerdictArgument(['ZUNIONSTORE', destination], keys);
 
     if (options?.WEIGHTS) {

lib/commands/ZUNION_WITHSCORES.ts

@@ -1,9 +1,10 @@
+import { TransformArgumentsReply } from '.';
 import { transformReplySortedSetWithScores } from './generic-transformers';
 import { transformArguments as transformZUnionArguments } from './ZUNION';
 
 export { FIRST_KEY_INDEX, IS_READ_ONLY } from './ZUNION';
 
-export function transformArguments(...args: Parameters<typeof transformZUnionArguments>): Array<string> {
+export function transformArguments(...args: Parameters<typeof transformZUnionArguments>): TransformArgumentsReply {
     return [
         ...transformZUnionArguments(...args),
         'WITHSCORES'

lib/commands/generic-transformers.ts

@@ -20,6 +20,10 @@ export function transformReplyString(reply: string): string {
     return reply;
 }
 
+export function transformReplyBuffer(reply: Buffer): Buffer {
+    return reply;
+}
+
 export function transformReplyStringNull(reply: string | null): string | null {
     return reply;
 }
@@ -352,11 +356,11 @@ export function pushStringTuplesArguments(args: Array<string>, tuples: StringTup
     return args;
 }
 
-export function pushVerdictArguments(args: TransformArgumentsReply, value: string | Array<string>): TransformArgumentsReply  {
+export function pushVerdictArguments(args: TransformArgumentsReply, value: string | Buffer | Array<string | Buffer>): TransformArgumentsReply  {
-    if (typeof value === 'string') {
+    if (Array.isArray(value)) {
-        args.push(value);
-    } else {
         args.push(...value);
+    } else {
+        args.push(value);
     }
 
     return args;

lib/commands/index.ts

@@ -61,6 +61,7 @@ import * as GEOPOS from './GEOPOS';
 import * as GEOSEARCH_WITH from './GEOSEARCH_WITH';
 import * as GEOSEARCH from './GEOSEARCH';
 import * as GEOSEARCHSTORE from './GEOSEARCHSTORE';
+import * as GET_BUFFER from './GET_BUFFER';
 import * as GET from './GET';
 import * as GETBIT from './GETBIT';
 import * as GETDEL from './GETDEL';
@@ -370,6 +371,8 @@ export default {
     geoSearch: GEOSEARCH,
     GEOSEARCHSTORE,
     geoSearchStore: GEOSEARCHSTORE,
+    GET_BUFFER,
+    getBuffer: GET_BUFFER,
     GET,
     get: GET,
     GETBIT,
@@ -733,15 +736,16 @@ export default {
     zUnionStore: ZUNIONSTORE
 };
 
-export type RedisReply = string | number | Array<RedisReply> | null | undefined;
+export type RedisReply = string | number | Buffer | Array<RedisReply> | null | undefined;
 
-export type TransformArgumentsReply = Array<string> & { preserve?: unknown };
+export type TransformArgumentsReply = Array<string | Buffer> & { preserve?: unknown };
 
 export interface RedisCommand {
     FIRST_KEY_INDEX?: number | ((...args: Array<any>) => string);
     IS_READ_ONLY?: boolean;
     transformArguments(...args: Array<any>): TransformArgumentsReply;
-    transformReply(reply: RedisReply, preserved: unknown): any;
+    BUFFER_MODE?: boolean;
+    transformReply(reply: RedisReply, preserved?: unknown): any;
 }
 
 export interface RedisCommands {

lib/multi-command.spec.ts

@@ -1,6 +1,5 @@
 import { strict as assert } from 'assert';
 import RedisMultiCommand from './multi-command';
-import { encodeCommand } from './commander';
 import { WatchError } from './errors';
 import { spy } from 'sinon';
 import { SQUARE_SCRIPT } from './client.spec';
@@ -10,11 +9,11 @@ describe('Multi Command', () => {
         it('simple', async () => {
             const multi = RedisMultiCommand.create((queue, symbol) => {
                 assert.deepEqual(
-                    queue.map(({encodedCommand}) => encodedCommand),
+                    queue.map(({ args }) => args),
                     [
-                        encodeCommand(['MULTI']),
+                        ['MULTI'],
-                        encodeCommand(['PING']),
+                        ['PING'],
-                        encodeCommand(['EXEC']),
+                        ['EXEC'],
                     ]
                 );
 
@@ -55,8 +54,8 @@ describe('Multi Command', () => {
         it('execAsPipeline', async () => {
             const multi = RedisMultiCommand.create(queue => {
                 assert.deepEqual(
-                    queue.map(({encodedCommand}) => encodedCommand),
+                    queue.map(({ args }) => args),
-                    [encodeCommand(['PING'])]
+                    [['PING']]
                 );
 
                 return Promise.resolve(['PONG']);
@@ -75,8 +74,8 @@ describe('Multi Command', () => {
         it('simple', async () => {
             const multi = RedisMultiCommand.create(queue => {
                 assert.deepEqual(
-                    queue.map(({encodedCommand}) => encodedCommand),
+                    queue.map(({ args }) => args),
-                    [encodeCommand(['PING'])]
+                    [['PING']]
                 );
 
                 return Promise.resolve(['PONG']);
@@ -111,10 +110,10 @@ describe('Multi Command', () => {
             assert.deepEqual(
                 await new MultiWithScript(queue => {
                     assert.deepEqual(
-                        queue.map(({encodedCommand}) => encodedCommand),
+                        queue.map(({ args }) => args),
                         [
-                            encodeCommand(['EVAL', SQUARE_SCRIPT.SCRIPT, '0', '2']),
+                            ['EVAL', SQUARE_SCRIPT.SCRIPT, '0', '2'],
-                            encodeCommand(['EVALSHA', SQUARE_SCRIPT.SHA1, '0', '3']),
+                            ['EVALSHA', SQUARE_SCRIPT.SHA1, '0', '3'],
                         ]
                     );
 

lib/multi-command.ts

@@ -2,7 +2,7 @@ import COMMANDS, { TransformArgumentsReply } from './commands';
 import { RedisCommand, RedisModules, RedisReply } from './commands';
 import { RedisLuaScript, RedisLuaScripts } from './lua-script';
 import { RedisClientOptions } from './client';
-import { extendWithModulesAndScripts, extendWithDefaultCommands, encodeCommand } from './commander';
+import { extendWithModulesAndScripts, extendWithDefaultCommands } from './commander';
 import { WatchError } from './errors';
 
 type RedisMultiCommandSignature<C extends RedisCommand, M extends RedisModules, S extends RedisLuaScripts> = (...args: Parameters<C['transformArguments']>) => RedisMultiCommandType<M, S>;
@@ -24,7 +24,7 @@ type WithScripts<M extends RedisModules, S extends RedisLuaScripts> = {
 export type RedisMultiCommandType<M extends RedisModules, S extends RedisLuaScripts> = RedisMultiCommand & WithCommands<M, S> & WithModules<M, S> & WithScripts<M, S>;
 
 export interface MultiQueuedCommand {
-    encodedCommand: string;
+    args: TransformArgumentsReply;
     preservedArguments?: unknown;
     transformReply?: RedisCommand['transformReply'];
 }
@@ -62,7 +62,9 @@ export default class RedisMultiCommand<M extends RedisModules = RedisModules, S
 
         const scriptArguments = script.transformArguments(...args);
         transformedArguments.push(...scriptArguments);
-        transformedArguments.preserve = scriptArguments.preserve;
+        if (scriptArguments.preserve) {
+            transformedArguments.preserve = scriptArguments.preserve;
+        }
 
         return this.addCommand(
             transformedArguments,
@@ -119,7 +121,7 @@ export default class RedisMultiCommand<M extends RedisModules = RedisModules, S
         this.#v4.addCommand = this.addCommand.bind(this);
         (this as any).addCommand = (...args: Array<unknown>): this => {
             this.#queue.push({
-                encodedCommand: encodeCommand(args.flat() as Array<string>)
+                args: args.flat() as Array<string>
             });
             return this;
         }
@@ -153,7 +155,7 @@ export default class RedisMultiCommand<M extends RedisModules = RedisModules, S
 
     addCommand(args: TransformArgumentsReply, transformReply?: RedisCommand['transformReply']): this {
         this.#queue.push({
-            encodedCommand: encodeCommand(args),
+            args,
             preservedArguments: args.preserve,
             transformReply
         });
@@ -170,13 +172,9 @@ export default class RedisMultiCommand<M extends RedisModules = RedisModules, S
 
         const queue = this.#queue.splice(0),
             rawReplies = await this.#executor([
-                {
+                { args: ['MULTI'] },
-                    encodedCommand: encodeCommand(['MULTI'])
-                },
                 ...queue,
-                {
+                { args: ['EXEC'] }
-                    encodedCommand: encodeCommand(['EXEC'])
-                }
             ], Symbol('[RedisMultiCommand] Chain ID')),
             execReply = rawReplies[rawReplies.length - 1] as (null | Array<RedisReply>);
 

lib/socket.ts

@@ -91,10 +91,8 @@ export default class RedisSocket extends EventEmitter {
         return this.#isOpen;
     }
 
-    get chunkRecommendedSize(): number {
+    get isSocketExists(): boolean {
-        if (!this.#socket) return 0;
+        return !!this.#socket;
-
-        return this.#socket.writableHighWaterMark - this.#socket.writableLength;
     }
 
     constructor(initiator?: RedisSocketInitiator, options?: RedisSocketOptions) {
@@ -214,12 +212,12 @@ export default class RedisSocket extends EventEmitter {
             .catch(err => this.emit('error', err));
     }
 
-    write(encodedCommands: string): boolean {
+    write(toWrite: string | Buffer): boolean {
         if (!this.#socket) {
             throw new ClientClosedError();
         }
 
-        return this.#socket.write(encodedCommands);
+        return this.#socket.write(toWrite);
     }
 
     async disconnect(ignoreIsOpen = false): Promise<void> {
@@ -251,4 +249,22 @@ export default class RedisSocket extends EventEmitter {
             throw err;
         }
     }
+
+    #isCorked = false;
+
+    cork(): void {
+        if (!this.#socket) {
+            return;
+        }
+
+        if (!this.#isCorked) {
+            this.#socket.cork();
+            this.#isCorked = true;
+
+            queueMicrotask(() => {
+                this.#socket?.uncork();
+                this.#isCorked = false;
+            });
+        }
+    }
 }

lib/ts-declarations/cluster-key-slot.d.ts

@@ -1,3 +1,3 @@
 declare module 'cluster-key-slot' {
-    export default function calculateSlot(key: string): number;
+    export default function calculateSlot(key: string | Buffer): number;
 }

lib/ts-declarations/redis-parser.d.ts

@@ -8,6 +8,8 @@ declare module 'redis-parser' {
     export default class RedisParser {
         constructor(callbacks: RedisParserCallbacks);
 
+        setReturnBuffers(returnBuffers?: boolean): void;
+
         execute(buffer: Buffer): void;
     }
 }