/**
 * Copyright (c) 2014 Baidu.com, Inc. All Rights Reserved
 *
 * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with
 * the License. You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on
 * an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the
 * specific language governing permissions and limitations under the License.
 *
 * @file src/wm_stream.ts
 * @author leeight
 */
import { Writable } from 'stream';
/**
 * Writable Memory Stream
 *
 * 可写内存流，可以用作 HTTP 客户端的输出流。
 * 数据会被存储在内存中的 Buffer 数组中。
 */
export default class WMStream extends Writable {
    /** 存储数据的 Buffer 数组 */
    store: Buffer[];
    /**
     * 构造函数
     *
     * @param options 流选项
     */
    constructor(options?: any);
    /**
     * 写入数据的内部实现
     *
     * @param chunk 要写入的数据块
     * @param encoding 编码类型
     * @param callback 完成回调
     */
    _write(chunk: any, encoding: BufferEncoding, callback: (error?: Error | null) => void): void;
    /**
     * 获取所有存储的数据作为单个 Buffer
     *
     * @returns 合并后的 Buffer
     */
    getBuffer(): Buffer;
    /**
     * 获取所有存储的数据作为字符串
     *
     * @param encoding 字符编码，默认为 'utf8'
     * @returns 字符串内容
     */
    getString(encoding?: BufferEncoding): string;
    /**
     * 获取存储的数据总长度
     *
     * @returns 数据总字节数
     */
    getLength(): number;
    /**
     * 清空存储的数据
     */
    clear(): void;
    /**
     * 获取所有 Buffer 的副本
     *
     * @returns Buffer 数组的副本
     */
    getBuffers(): Buffer[];
}
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