1702 lines
81 KiB
Plaintext
1702 lines
81 KiB
Plaintext
/**
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* A stream is an abstract interface for working with streaming data in Node.js.
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* The `node:stream` module provides an API for implementing the stream interface.
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*
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* There are many stream objects provided by Node.js. For instance, a `request to an HTTP server` and `process.stdout` are both stream instances.
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*
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* Streams can be readable, writable, or both. All streams are instances of `EventEmitter`.
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*
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* To access the `node:stream` module:
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*
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* ```js
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* const stream = require('node:stream');
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* ```
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*
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* The `node:stream` module is useful for creating new types of stream instances.
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* It is usually not necessary to use the `node:stream` module to consume streams.
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* @see [source](https://github.com/nodejs/node/blob/v20.2.0/lib/stream.js)
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*/
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declare module "stream" {
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import { Abortable, EventEmitter } from "node:events";
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import { Blob as NodeBlob } from "node:buffer";
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import * as streamPromises from "node:stream/promises";
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import * as streamConsumers from "node:stream/consumers";
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import * as streamWeb from "node:stream/web";
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type ComposeFnParam = (source: any) => void;
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class internal extends EventEmitter {
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pipe<T extends NodeJS.WritableStream>(
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destination: T,
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options?: {
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end?: boolean | undefined;
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},
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): T;
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compose<T extends NodeJS.ReadableStream>(
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stream: T | ComposeFnParam | Iterable<T> | AsyncIterable<T>,
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options?: { signal: AbortSignal },
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): T;
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}
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import Stream = internal.Stream;
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import Readable = internal.Readable;
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import ReadableOptions = internal.ReadableOptions;
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interface ArrayOptions {
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/** the maximum concurrent invocations of `fn` to call on the stream at once. **Default: 1**. */
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concurrency?: number;
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/** allows destroying the stream if the signal is aborted. */
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signal?: AbortSignal;
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}
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class ReadableBase extends Stream implements NodeJS.ReadableStream {
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/**
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* A utility method for creating Readable Streams out of iterators.
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*/
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static from(iterable: Iterable<any> | AsyncIterable<any>, options?: ReadableOptions): Readable;
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/**
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* Returns whether the stream has been read from or cancelled.
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* @since v16.8.0
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*/
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static isDisturbed(stream: Readable | NodeJS.ReadableStream): boolean;
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/**
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* Returns whether the stream was destroyed or errored before emitting `'end'`.
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* @since v16.8.0
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* @experimental
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*/
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readonly readableAborted: boolean;
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/**
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* Is `true` if it is safe to call `readable.read()`, which means
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* the stream has not been destroyed or emitted `'error'` or `'end'`.
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* @since v11.4.0
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*/
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readable: boolean;
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/**
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* Returns whether `'data'` has been emitted.
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* @since v16.7.0, v14.18.0
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* @experimental
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*/
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readonly readableDidRead: boolean;
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/**
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* Getter for the property `encoding` of a given `Readable` stream. The `encoding`property can be set using the `readable.setEncoding()` method.
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* @since v12.7.0
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*/
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readonly readableEncoding: BufferEncoding | null;
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/**
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* Becomes `true` when `'end'` event is emitted.
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* @since v12.9.0
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*/
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readonly readableEnded: boolean;
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/**
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* This property reflects the current state of a `Readable` stream as described
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* in the `Three states` section.
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* @since v9.4.0
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*/
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readonly readableFlowing: boolean | null;
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/**
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* Returns the value of `highWaterMark` passed when creating this `Readable`.
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* @since v9.3.0
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*/
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readonly readableHighWaterMark: number;
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/**
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* This property contains the number of bytes (or objects) in the queue
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* ready to be read. The value provides introspection data regarding
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* the status of the `highWaterMark`.
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* @since v9.4.0
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*/
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readonly readableLength: number;
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/**
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* Getter for the property `objectMode` of a given `Readable` stream.
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* @since v12.3.0
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*/
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readonly readableObjectMode: boolean;
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/**
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* Is `true` after `readable.destroy()` has been called.
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* @since v8.0.0
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*/
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destroyed: boolean;
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/**
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* Is `true` after `'close'` has been emitted.
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* @since v18.0.0
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*/
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readonly closed: boolean;
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/**
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* Returns error if the stream has been destroyed with an error.
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* @since v18.0.0
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*/
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readonly errored: Error | null;
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constructor(opts?: ReadableOptions);
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_construct?(callback: (error?: Error | null) => void): void;
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_read(size: number): void;
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/**
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* The `readable.read()` method reads data out of the internal buffer and
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* returns it. If no data is available to be read, `null` is returned. By default,
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* the data is returned as a `Buffer` object unless an encoding has been
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* specified using the `readable.setEncoding()` method or the stream is operating
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* in object mode.
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*
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* The optional `size` argument specifies a specific number of bytes to read. If`size` bytes are not available to be read, `null` will be returned _unless_the stream has ended, in which
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* case all of the data remaining in the internal
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* buffer will be returned.
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*
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* If the `size` argument is not specified, all of the data contained in the
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* internal buffer will be returned.
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*
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* The `size` argument must be less than or equal to 1 GiB.
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*
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* The `readable.read()` method should only be called on `Readable` streams
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* operating in paused mode. In flowing mode, `readable.read()` is called
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* automatically until the internal buffer is fully drained.
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*
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* ```js
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* const readable = getReadableStreamSomehow();
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*
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* // 'readable' may be triggered multiple times as data is buffered in
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* readable.on('readable', () => {
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* let chunk;
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* console.log('Stream is readable (new data received in buffer)');
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* // Use a loop to make sure we read all currently available data
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* while (null !== (chunk = readable.read())) {
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* console.log(`Read ${chunk.length} bytes of data...`);
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* }
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* });
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*
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* // 'end' will be triggered once when there is no more data available
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* readable.on('end', () => {
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* console.log('Reached end of stream.');
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* });
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* ```
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*
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* Each call to `readable.read()` returns a chunk of data, or `null`. The chunks
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* are not concatenated. A `while` loop is necessary to consume all data
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* currently in the buffer. When reading a large file `.read()` may return `null`,
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* having consumed all buffered content so far, but there is still more data to
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* come not yet buffered. In this case a new `'readable'` event will be emitted
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* when there is more data in the buffer. Finally the `'end'` event will be
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* emitted when there is no more data to come.
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*
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* Therefore to read a file's whole contents from a `readable`, it is necessary
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* to collect chunks across multiple `'readable'` events:
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*
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* ```js
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* const chunks = [];
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*
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* readable.on('readable', () => {
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* let chunk;
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* while (null !== (chunk = readable.read())) {
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* chunks.push(chunk);
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* }
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* });
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*
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* readable.on('end', () => {
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* const content = chunks.join('');
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* });
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* ```
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*
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* A `Readable` stream in object mode will always return a single item from
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* a call to `readable.read(size)`, regardless of the value of the`size` argument.
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*
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* If the `readable.read()` method returns a chunk of data, a `'data'` event will
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* also be emitted.
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*
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* Calling {@link read} after the `'end'` event has
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* been emitted will return `null`. No runtime error will be raised.
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* @since v0.9.4
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* @param size Optional argument to specify how much data to read.
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*/
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read(size?: number): any;
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/**
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* The `readable.setEncoding()` method sets the character encoding for
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* data read from the `Readable` stream.
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*
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* By default, no encoding is assigned and stream data will be returned as`Buffer` objects. Setting an encoding causes the stream data
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* to be returned as strings of the specified encoding rather than as `Buffer`objects. For instance, calling `readable.setEncoding('utf8')` will cause the
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* output data to be interpreted as UTF-8 data, and passed as strings. Calling`readable.setEncoding('hex')` will cause the data to be encoded in hexadecimal
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* string format.
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*
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* The `Readable` stream will properly handle multi-byte characters delivered
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* through the stream that would otherwise become improperly decoded if simply
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* pulled from the stream as `Buffer` objects.
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*
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* ```js
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* const readable = getReadableStreamSomehow();
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* readable.setEncoding('utf8');
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* readable.on('data', (chunk) => {
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* assert.equal(typeof chunk, 'string');
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* console.log('Got %d characters of string data:', chunk.length);
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* });
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* ```
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* @since v0.9.4
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* @param encoding The encoding to use.
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*/
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setEncoding(encoding: BufferEncoding): this;
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/**
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* The `readable.pause()` method will cause a stream in flowing mode to stop
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* emitting `'data'` events, switching out of flowing mode. Any data that
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* becomes available will remain in the internal buffer.
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*
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* ```js
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* const readable = getReadableStreamSomehow();
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* readable.on('data', (chunk) => {
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* console.log(`Received ${chunk.length} bytes of data.`);
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* readable.pause();
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* console.log('There will be no additional data for 1 second.');
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* setTimeout(() => {
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* console.log('Now data will start flowing again.');
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* readable.resume();
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* }, 1000);
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* });
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* ```
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*
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* The `readable.pause()` method has no effect if there is a `'readable'`event listener.
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* @since v0.9.4
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*/
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pause(): this;
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/**
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* The `readable.resume()` method causes an explicitly paused `Readable` stream to
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* resume emitting `'data'` events, switching the stream into flowing mode.
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*
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* The `readable.resume()` method can be used to fully consume the data from a
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* stream without actually processing any of that data:
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*
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* ```js
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* getReadableStreamSomehow()
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* .resume()
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* .on('end', () => {
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* console.log('Reached the end, but did not read anything.');
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* });
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* ```
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*
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* The `readable.resume()` method has no effect if there is a `'readable'`event listener.
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* @since v0.9.4
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*/
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resume(): this;
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/**
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* The `readable.isPaused()` method returns the current operating state of the`Readable`. This is used primarily by the mechanism that underlies the`readable.pipe()` method. In most
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* typical cases, there will be no reason to
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* use this method directly.
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*
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* ```js
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* const readable = new stream.Readable();
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*
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* readable.isPaused(); // === false
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* readable.pause();
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* readable.isPaused(); // === true
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* readable.resume();
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* readable.isPaused(); // === false
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* ```
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* @since v0.11.14
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*/
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isPaused(): boolean;
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/**
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* The `readable.unpipe()` method detaches a `Writable` stream previously attached
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* using the {@link pipe} method.
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*
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* If the `destination` is not specified, then _all_ pipes are detached.
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*
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* If the `destination` is specified, but no pipe is set up for it, then
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* the method does nothing.
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*
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* ```js
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* const fs = require('node:fs');
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* const readable = getReadableStreamSomehow();
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* const writable = fs.createWriteStream('file.txt');
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* // All the data from readable goes into 'file.txt',
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* // but only for the first second.
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* readable.pipe(writable);
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* setTimeout(() => {
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* console.log('Stop writing to file.txt.');
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* readable.unpipe(writable);
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* console.log('Manually close the file stream.');
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* writable.end();
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* }, 1000);
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* ```
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* @since v0.9.4
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* @param destination Optional specific stream to unpipe
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*/
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unpipe(destination?: NodeJS.WritableStream): this;
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/**
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* Passing `chunk` as `null` signals the end of the stream (EOF) and behaves the
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* same as `readable.push(null)`, after which no more data can be written. The EOF
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* signal is put at the end of the buffer and any buffered data will still be
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* flushed.
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*
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* The `readable.unshift()` method pushes a chunk of data back into the internal
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* buffer. This is useful in certain situations where a stream is being consumed by
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* code that needs to "un-consume" some amount of data that it has optimistically
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* pulled out of the source, so that the data can be passed on to some other party.
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*
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* The `stream.unshift(chunk)` method cannot be called after the `'end'` event
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* has been emitted or a runtime error will be thrown.
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*
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* Developers using `stream.unshift()` often should consider switching to
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* use of a `Transform` stream instead. See the `API for stream implementers` section for more information.
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*
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* ```js
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* // Pull off a header delimited by \n\n.
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* // Use unshift() if we get too much.
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* // Call the callback with (error, header, stream).
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* const { StringDecoder } = require('node:string_decoder');
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* function parseHeader(stream, callback) {
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* stream.on('error', callback);
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* stream.on('readable', onReadable);
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* const decoder = new StringDecoder('utf8');
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* let header = '';
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* function onReadable() {
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* let chunk;
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* while (null !== (chunk = stream.read())) {
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* const str = decoder.write(chunk);
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* if (str.includes('\n\n')) {
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* // Found the header boundary.
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* const split = str.split(/\n\n/);
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* header += split.shift();
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* const remaining = split.join('\n\n');
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* const buf = Buffer.from(remaining, 'utf8');
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* stream.removeListener('error', callback);
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* // Remove the 'readable' listener before unshifting.
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* stream.removeListener('readable', onReadable);
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* if (buf.length)
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* stream.unshift(buf);
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* // Now the body of the message can be read from the stream.
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* callback(null, header, stream);
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* return;
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* }
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* // Still reading the header.
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* header += str;
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* }
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* }
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* }
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* ```
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*
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* Unlike {@link push}, `stream.unshift(chunk)` will not
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* end the reading process by resetting the internal reading state of the stream.
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* This can cause unexpected results if `readable.unshift()` is called during a
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* read (i.e. from within a {@link _read} implementation on a
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* custom stream). Following the call to `readable.unshift()` with an immediate {@link push} will reset the reading state appropriately,
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* however it is best to simply avoid calling `readable.unshift()` while in the
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* process of performing a read.
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* @since v0.9.11
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* @param chunk Chunk of data to unshift onto the read queue. For streams not operating in object mode, `chunk` must be a string, `Buffer`, `Uint8Array`, or `null`. For object mode
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* streams, `chunk` may be any JavaScript value.
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* @param encoding Encoding of string chunks. Must be a valid `Buffer` encoding, such as `'utf8'` or `'ascii'`.
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*/
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unshift(chunk: any, encoding?: BufferEncoding): void;
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/**
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* Prior to Node.js 0.10, streams did not implement the entire `node:stream`module API as it is currently defined. (See `Compatibility` for more
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* information.)
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*
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* When using an older Node.js library that emits `'data'` events and has a {@link pause} method that is advisory only, the`readable.wrap()` method can be used to create a `Readable`
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* stream that uses
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* the old stream as its data source.
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*
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* It will rarely be necessary to use `readable.wrap()` but the method has been
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* provided as a convenience for interacting with older Node.js applications and
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* libraries.
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*
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* ```js
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* const { OldReader } = require('./old-api-module.js');
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* const { Readable } = require('node:stream');
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* const oreader = new OldReader();
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* const myReader = new Readable().wrap(oreader);
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*
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* myReader.on('readable', () => {
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* myReader.read(); // etc.
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* });
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* ```
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* @since v0.9.4
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* @param stream An "old style" readable stream
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*/
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wrap(stream: NodeJS.ReadableStream): this;
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push(chunk: any, encoding?: BufferEncoding): boolean;
|
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/**
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* The iterator created by this method gives users the option to cancel the destruction
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* of the stream if the `for await...of` loop is exited by `return`, `break`, or `throw`,
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* or if the iterator should destroy the stream if the stream emitted an error during iteration.
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* @since v16.3.0
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* @param options.destroyOnReturn When set to `false`, calling `return` on the async iterator,
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* or exiting a `for await...of` iteration using a `break`, `return`, or `throw` will not destroy the stream.
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* **Default: `true`**.
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*/
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iterator(options?: { destroyOnReturn?: boolean }): AsyncIterableIterator<any>;
|
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/**
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* This method allows mapping over the stream. The *fn* function will be called for every chunk in the stream.
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* If the *fn* function returns a promise - that promise will be `await`ed before being passed to the result stream.
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* @since v17.4.0, v16.14.0
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* @param fn a function to map over every chunk in the stream. Async or not.
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* @returns a stream mapped with the function *fn*.
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*/
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map(fn: (data: any, options?: Pick<ArrayOptions, "signal">) => any, options?: ArrayOptions): Readable;
|
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/**
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* This method allows filtering the stream. For each chunk in the stream the *fn* function will be called
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* and if it returns a truthy value, the chunk will be passed to the result stream.
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* If the *fn* function returns a promise - that promise will be `await`ed.
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* @since v17.4.0, v16.14.0
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* @param fn a function to filter chunks from the stream. Async or not.
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* @returns a stream filtered with the predicate *fn*.
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*/
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filter(
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fn: (data: any, options?: Pick<ArrayOptions, "signal">) => boolean | Promise<boolean>,
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options?: ArrayOptions,
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): Readable;
|
|
/**
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* This method allows iterating a stream. For each chunk in the stream the *fn* function will be called.
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* If the *fn* function returns a promise - that promise will be `await`ed.
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*
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* This method is different from `for await...of` loops in that it can optionally process chunks concurrently.
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* In addition, a `forEach` iteration can only be stopped by having passed a `signal` option
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* and aborting the related AbortController while `for await...of` can be stopped with `break` or `return`.
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* In either case the stream will be destroyed.
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*
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* This method is different from listening to the `'data'` event in that it uses the `readable` event
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* in the underlying machinary and can limit the number of concurrent *fn* calls.
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* @since v17.5.0
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* @param fn a function to call on each chunk of the stream. Async or not.
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* @returns a promise for when the stream has finished.
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*/
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forEach(
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fn: (data: any, options?: Pick<ArrayOptions, "signal">) => void | Promise<void>,
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options?: ArrayOptions,
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): Promise<void>;
|
|
/**
|
|
* This method allows easily obtaining the contents of a stream.
|
|
*
|
|
* As this method reads the entire stream into memory, it negates the benefits of streams. It's intended
|
|
* for interoperability and convenience, not as the primary way to consume streams.
|
|
* @since v17.5.0
|
|
* @returns a promise containing an array with the contents of the stream.
|
|
*/
|
|
toArray(options?: Pick<ArrayOptions, "signal">): Promise<any[]>;
|
|
/**
|
|
* This method is similar to `Array.prototype.some` and calls *fn* on each chunk in the stream
|
|
* until the awaited return value is `true` (or any truthy value). Once an *fn* call on a chunk
|
|
* `await`ed return value is truthy, the stream is destroyed and the promise is fulfilled with `true`.
|
|
* If none of the *fn* calls on the chunks return a truthy value, the promise is fulfilled with `false`.
|
|
* @since v17.5.0
|
|
* @param fn a function to call on each chunk of the stream. Async or not.
|
|
* @returns a promise evaluating to `true` if *fn* returned a truthy value for at least one of the chunks.
|
|
*/
|
|
some(
|
|
fn: (data: any, options?: Pick<ArrayOptions, "signal">) => boolean | Promise<boolean>,
|
|
options?: ArrayOptions,
|
|
): Promise<boolean>;
|
|
/**
|
|
* This method is similar to `Array.prototype.find` and calls *fn* on each chunk in the stream
|
|
* to find a chunk with a truthy value for *fn*. Once an *fn* call's awaited return value is truthy,
|
|
* the stream is destroyed and the promise is fulfilled with value for which *fn* returned a truthy value.
|
|
* If all of the *fn* calls on the chunks return a falsy value, the promise is fulfilled with `undefined`.
|
|
* @since v17.5.0
|
|
* @param fn a function to call on each chunk of the stream. Async or not.
|
|
* @returns a promise evaluating to the first chunk for which *fn* evaluated with a truthy value,
|
|
* or `undefined` if no element was found.
|
|
*/
|
|
find<T>(
|
|
fn: (data: any, options?: Pick<ArrayOptions, "signal">) => data is T,
|
|
options?: ArrayOptions,
|
|
): Promise<T | undefined>;
|
|
find(
|
|
fn: (data: any, options?: Pick<ArrayOptions, "signal">) => boolean | Promise<boolean>,
|
|
options?: ArrayOptions,
|
|
): Promise<any>;
|
|
/**
|
|
* This method is similar to `Array.prototype.every` and calls *fn* on each chunk in the stream
|
|
* to check if all awaited return values are truthy value for *fn*. Once an *fn* call on a chunk
|
|
* `await`ed return value is falsy, the stream is destroyed and the promise is fulfilled with `false`.
|
|
* If all of the *fn* calls on the chunks return a truthy value, the promise is fulfilled with `true`.
|
|
* @since v17.5.0
|
|
* @param fn a function to call on each chunk of the stream. Async or not.
|
|
* @returns a promise evaluating to `true` if *fn* returned a truthy value for every one of the chunks.
|
|
*/
|
|
every(
|
|
fn: (data: any, options?: Pick<ArrayOptions, "signal">) => boolean | Promise<boolean>,
|
|
options?: ArrayOptions,
|
|
): Promise<boolean>;
|
|
/**
|
|
* This method returns a new stream by applying the given callback to each chunk of the stream
|
|
* and then flattening the result.
|
|
*
|
|
* It is possible to return a stream or another iterable or async iterable from *fn* and the result streams
|
|
* will be merged (flattened) into the returned stream.
|
|
* @since v17.5.0
|
|
* @param fn a function to map over every chunk in the stream. May be async. May be a stream or generator.
|
|
* @returns a stream flat-mapped with the function *fn*.
|
|
*/
|
|
flatMap(fn: (data: any, options?: Pick<ArrayOptions, "signal">) => any, options?: ArrayOptions): Readable;
|
|
/**
|
|
* This method returns a new stream with the first *limit* chunks dropped from the start.
|
|
* @since v17.5.0
|
|
* @param limit the number of chunks to drop from the readable.
|
|
* @returns a stream with *limit* chunks dropped from the start.
|
|
*/
|
|
drop(limit: number, options?: Pick<ArrayOptions, "signal">): Readable;
|
|
/**
|
|
* This method returns a new stream with the first *limit* chunks.
|
|
* @since v17.5.0
|
|
* @param limit the number of chunks to take from the readable.
|
|
* @returns a stream with *limit* chunks taken.
|
|
*/
|
|
take(limit: number, options?: Pick<ArrayOptions, "signal">): Readable;
|
|
/**
|
|
* This method returns a new stream with chunks of the underlying stream paired with a counter
|
|
* in the form `[index, chunk]`. The first index value is `0` and it increases by 1 for each chunk produced.
|
|
* @since v17.5.0
|
|
* @returns a stream of indexed pairs.
|
|
*/
|
|
asIndexedPairs(options?: Pick<ArrayOptions, "signal">): Readable;
|
|
/**
|
|
* This method calls *fn* on each chunk of the stream in order, passing it the result from the calculation
|
|
* on the previous element. It returns a promise for the final value of the reduction.
|
|
*
|
|
* If no *initial* value is supplied the first chunk of the stream is used as the initial value.
|
|
* If the stream is empty, the promise is rejected with a `TypeError` with the `ERR_INVALID_ARGS` code property.
|
|
*
|
|
* The reducer function iterates the stream element-by-element which means that there is no *concurrency* parameter
|
|
* or parallelism. To perform a reduce concurrently, you can extract the async function to `readable.map` method.
|
|
* @since v17.5.0
|
|
* @param fn a reducer function to call over every chunk in the stream. Async or not.
|
|
* @param initial the initial value to use in the reduction.
|
|
* @returns a promise for the final value of the reduction.
|
|
*/
|
|
reduce<T = any>(
|
|
fn: (previous: any, data: any, options?: Pick<ArrayOptions, "signal">) => T,
|
|
initial?: undefined,
|
|
options?: Pick<ArrayOptions, "signal">,
|
|
): Promise<T>;
|
|
reduce<T = any>(
|
|
fn: (previous: T, data: any, options?: Pick<ArrayOptions, "signal">) => T,
|
|
initial: T,
|
|
options?: Pick<ArrayOptions, "signal">,
|
|
): Promise<T>;
|
|
_destroy(error: Error | null, callback: (error?: Error | null) => void): void;
|
|
/**
|
|
* Destroy the stream. Optionally emit an `'error'` event, and emit a `'close'`event (unless `emitClose` is set to `false`). After this call, the readable
|
|
* stream will release any internal resources and subsequent calls to `push()`will be ignored.
|
|
*
|
|
* Once `destroy()` has been called any further calls will be a no-op and no
|
|
* further errors except from `_destroy()` may be emitted as `'error'`.
|
|
*
|
|
* Implementors should not override this method, but instead implement `readable._destroy()`.
|
|
* @since v8.0.0
|
|
* @param error Error which will be passed as payload in `'error'` event
|
|
*/
|
|
destroy(error?: Error): this;
|
|
/**
|
|
* Event emitter
|
|
* The defined events on documents including:
|
|
* 1. close
|
|
* 2. data
|
|
* 3. end
|
|
* 4. error
|
|
* 5. pause
|
|
* 6. readable
|
|
* 7. resume
|
|
*/
|
|
addListener(event: "close", listener: () => void): this;
|
|
addListener(event: "data", listener: (chunk: any) => void): this;
|
|
addListener(event: "end", listener: () => void): this;
|
|
addListener(event: "error", listener: (err: Error) => void): this;
|
|
addListener(event: "pause", listener: () => void): this;
|
|
addListener(event: "readable", listener: () => void): this;
|
|
addListener(event: "resume", listener: () => void): this;
|
|
addListener(event: string | symbol, listener: (...args: any[]) => void): this;
|
|
emit(event: "close"): boolean;
|
|
emit(event: "data", chunk: any): boolean;
|
|
emit(event: "end"): boolean;
|
|
emit(event: "error", err: Error): boolean;
|
|
emit(event: "pause"): boolean;
|
|
emit(event: "readable"): boolean;
|
|
emit(event: "resume"): boolean;
|
|
emit(event: string | symbol, ...args: any[]): boolean;
|
|
on(event: "close", listener: () => void): this;
|
|
on(event: "data", listener: (chunk: any) => void): this;
|
|
on(event: "end", listener: () => void): this;
|
|
on(event: "error", listener: (err: Error) => void): this;
|
|
on(event: "pause", listener: () => void): this;
|
|
on(event: "readable", listener: () => void): this;
|
|
on(event: "resume", listener: () => void): this;
|
|
on(event: string | symbol, listener: (...args: any[]) => void): this;
|
|
once(event: "close", listener: () => void): this;
|
|
once(event: "data", listener: (chunk: any) => void): this;
|
|
once(event: "end", listener: () => void): this;
|
|
once(event: "error", listener: (err: Error) => void): this;
|
|
once(event: "pause", listener: () => void): this;
|
|
once(event: "readable", listener: () => void): this;
|
|
once(event: "resume", listener: () => void): this;
|
|
once(event: string | symbol, listener: (...args: any[]) => void): this;
|
|
prependListener(event: "close", listener: () => void): this;
|
|
prependListener(event: "data", listener: (chunk: any) => void): this;
|
|
prependListener(event: "end", listener: () => void): this;
|
|
prependListener(event: "error", listener: (err: Error) => void): this;
|
|
prependListener(event: "pause", listener: () => void): this;
|
|
prependListener(event: "readable", listener: () => void): this;
|
|
prependListener(event: "resume", listener: () => void): this;
|
|
prependListener(event: string | symbol, listener: (...args: any[]) => void): this;
|
|
prependOnceListener(event: "close", listener: () => void): this;
|
|
prependOnceListener(event: "data", listener: (chunk: any) => void): this;
|
|
prependOnceListener(event: "end", listener: () => void): this;
|
|
prependOnceListener(event: "error", listener: (err: Error) => void): this;
|
|
prependOnceListener(event: "pause", listener: () => void): this;
|
|
prependOnceListener(event: "readable", listener: () => void): this;
|
|
prependOnceListener(event: "resume", listener: () => void): this;
|
|
prependOnceListener(event: string | symbol, listener: (...args: any[]) => void): this;
|
|
removeListener(event: "close", listener: () => void): this;
|
|
removeListener(event: "data", listener: (chunk: any) => void): this;
|
|
removeListener(event: "end", listener: () => void): this;
|
|
removeListener(event: "error", listener: (err: Error) => void): this;
|
|
removeListener(event: "pause", listener: () => void): this;
|
|
removeListener(event: "readable", listener: () => void): this;
|
|
removeListener(event: "resume", listener: () => void): this;
|
|
removeListener(event: string | symbol, listener: (...args: any[]) => void): this;
|
|
[Symbol.asyncIterator](): AsyncIterableIterator<any>;
|
|
/**
|
|
* Calls `readable.destroy()` with an `AbortError` and returns a promise that fulfills when the stream is finished.
|
|
* @since v20.4.0
|
|
*/
|
|
[Symbol.asyncDispose](): Promise<void>;
|
|
}
|
|
import WritableOptions = internal.WritableOptions;
|
|
class WritableBase extends Stream implements NodeJS.WritableStream {
|
|
/**
|
|
* Is `true` if it is safe to call `writable.write()`, which means
|
|
* the stream has not been destroyed, errored, or ended.
|
|
* @since v11.4.0
|
|
*/
|
|
readonly writable: boolean;
|
|
/**
|
|
* Is `true` after `writable.end()` has been called. This property
|
|
* does not indicate whether the data has been flushed, for this use `writable.writableFinished` instead.
|
|
* @since v12.9.0
|
|
*/
|
|
readonly writableEnded: boolean;
|
|
/**
|
|
* Is set to `true` immediately before the `'finish'` event is emitted.
|
|
* @since v12.6.0
|
|
*/
|
|
readonly writableFinished: boolean;
|
|
/**
|
|
* Return the value of `highWaterMark` passed when creating this `Writable`.
|
|
* @since v9.3.0
|
|
*/
|
|
readonly writableHighWaterMark: number;
|
|
/**
|
|
* This property contains the number of bytes (or objects) in the queue
|
|
* ready to be written. The value provides introspection data regarding
|
|
* the status of the `highWaterMark`.
|
|
* @since v9.4.0
|
|
*/
|
|
readonly writableLength: number;
|
|
/**
|
|
* Getter for the property `objectMode` of a given `Writable` stream.
|
|
* @since v12.3.0
|
|
*/
|
|
readonly writableObjectMode: boolean;
|
|
/**
|
|
* Number of times `writable.uncork()` needs to be
|
|
* called in order to fully uncork the stream.
|
|
* @since v13.2.0, v12.16.0
|
|
*/
|
|
readonly writableCorked: number;
|
|
/**
|
|
* Is `true` after `writable.destroy()` has been called.
|
|
* @since v8.0.0
|
|
*/
|
|
destroyed: boolean;
|
|
/**
|
|
* Is `true` after `'close'` has been emitted.
|
|
* @since v18.0.0
|
|
*/
|
|
readonly closed: boolean;
|
|
/**
|
|
* Returns error if the stream has been destroyed with an error.
|
|
* @since v18.0.0
|
|
*/
|
|
readonly errored: Error | null;
|
|
/**
|
|
* Is `true` if the stream's buffer has been full and stream will emit `'drain'`.
|
|
* @since v15.2.0, v14.17.0
|
|
*/
|
|
readonly writableNeedDrain: boolean;
|
|
constructor(opts?: WritableOptions);
|
|
_write(chunk: any, encoding: BufferEncoding, callback: (error?: Error | null) => void): void;
|
|
_writev?(
|
|
chunks: Array<{
|
|
chunk: any;
|
|
encoding: BufferEncoding;
|
|
}>,
|
|
callback: (error?: Error | null) => void,
|
|
): void;
|
|
_construct?(callback: (error?: Error | null) => void): void;
|
|
_destroy(error: Error | null, callback: (error?: Error | null) => void): void;
|
|
_final(callback: (error?: Error | null) => void): void;
|
|
/**
|
|
* The `writable.write()` method writes some data to the stream, and calls the
|
|
* supplied `callback` once the data has been fully handled. If an error
|
|
* occurs, the `callback` will be called with the error as its
|
|
* first argument. The `callback` is called asynchronously and before `'error'` is
|
|
* emitted.
|
|
*
|
|
* The return value is `true` if the internal buffer is less than the`highWaterMark` configured when the stream was created after admitting `chunk`.
|
|
* If `false` is returned, further attempts to write data to the stream should
|
|
* stop until the `'drain'` event is emitted.
|
|
*
|
|
* While a stream is not draining, calls to `write()` will buffer `chunk`, and
|
|
* return false. Once all currently buffered chunks are drained (accepted for
|
|
* delivery by the operating system), the `'drain'` event will be emitted.
|
|
* Once `write()` returns false, do not write more chunks
|
|
* until the `'drain'` event is emitted. While calling `write()` on a stream that
|
|
* is not draining is allowed, Node.js will buffer all written chunks until
|
|
* maximum memory usage occurs, at which point it will abort unconditionally.
|
|
* Even before it aborts, high memory usage will cause poor garbage collector
|
|
* performance and high RSS (which is not typically released back to the system,
|
|
* even after the memory is no longer required). Since TCP sockets may never
|
|
* drain if the remote peer does not read the data, writing a socket that is
|
|
* not draining may lead to a remotely exploitable vulnerability.
|
|
*
|
|
* Writing data while the stream is not draining is particularly
|
|
* problematic for a `Transform`, because the `Transform` streams are paused
|
|
* by default until they are piped or a `'data'` or `'readable'` event handler
|
|
* is added.
|
|
*
|
|
* If the data to be written can be generated or fetched on demand, it is
|
|
* recommended to encapsulate the logic into a `Readable` and use {@link pipe}. However, if calling `write()` is preferred, it is
|
|
* possible to respect backpressure and avoid memory issues using the `'drain'` event:
|
|
*
|
|
* ```js
|
|
* function write(data, cb) {
|
|
* if (!stream.write(data)) {
|
|
* stream.once('drain', cb);
|
|
* } else {
|
|
* process.nextTick(cb);
|
|
* }
|
|
* }
|
|
*
|
|
* // Wait for cb to be called before doing any other write.
|
|
* write('hello', () => {
|
|
* console.log('Write completed, do more writes now.');
|
|
* });
|
|
* ```
|
|
*
|
|
* A `Writable` stream in object mode will always ignore the `encoding` argument.
|
|
* @since v0.9.4
|
|
* @param chunk Optional data to write. For streams not operating in object mode, `chunk` must be a string, `Buffer` or `Uint8Array`. For object mode streams, `chunk` may be any
|
|
* JavaScript value other than `null`.
|
|
* @param [encoding='utf8'] The encoding, if `chunk` is a string.
|
|
* @param callback Callback for when this chunk of data is flushed.
|
|
* @return `false` if the stream wishes for the calling code to wait for the `'drain'` event to be emitted before continuing to write additional data; otherwise `true`.
|
|
*/
|
|
write(chunk: any, callback?: (error: Error | null | undefined) => void): boolean;
|
|
write(chunk: any, encoding: BufferEncoding, callback?: (error: Error | null | undefined) => void): boolean;
|
|
/**
|
|
* The `writable.setDefaultEncoding()` method sets the default `encoding` for a `Writable` stream.
|
|
* @since v0.11.15
|
|
* @param encoding The new default encoding
|
|
*/
|
|
setDefaultEncoding(encoding: BufferEncoding): this;
|
|
/**
|
|
* Calling the `writable.end()` method signals that no more data will be written
|
|
* to the `Writable`. The optional `chunk` and `encoding` arguments allow one
|
|
* final additional chunk of data to be written immediately before closing the
|
|
* stream.
|
|
*
|
|
* Calling the {@link write} method after calling {@link end} will raise an error.
|
|
*
|
|
* ```js
|
|
* // Write 'hello, ' and then end with 'world!'.
|
|
* const fs = require('node:fs');
|
|
* const file = fs.createWriteStream('example.txt');
|
|
* file.write('hello, ');
|
|
* file.end('world!');
|
|
* // Writing more now is not allowed!
|
|
* ```
|
|
* @since v0.9.4
|
|
* @param chunk Optional data to write. For streams not operating in object mode, `chunk` must be a string, `Buffer` or `Uint8Array`. For object mode streams, `chunk` may be any
|
|
* JavaScript value other than `null`.
|
|
* @param encoding The encoding if `chunk` is a string
|
|
* @param callback Callback for when the stream is finished.
|
|
*/
|
|
end(cb?: () => void): this;
|
|
end(chunk: any, cb?: () => void): this;
|
|
end(chunk: any, encoding: BufferEncoding, cb?: () => void): this;
|
|
/**
|
|
* The `writable.cork()` method forces all written data to be buffered in memory.
|
|
* The buffered data will be flushed when either the {@link uncork} or {@link end} methods are called.
|
|
*
|
|
* The primary intent of `writable.cork()` is to accommodate a situation in which
|
|
* several small chunks are written to the stream in rapid succession. Instead of
|
|
* immediately forwarding them to the underlying destination, `writable.cork()`buffers all the chunks until `writable.uncork()` is called, which will pass them
|
|
* all to `writable._writev()`, if present. This prevents a head-of-line blocking
|
|
* situation where data is being buffered while waiting for the first small chunk
|
|
* to be processed. However, use of `writable.cork()` without implementing`writable._writev()` may have an adverse effect on throughput.
|
|
*
|
|
* See also: `writable.uncork()`, `writable._writev()`.
|
|
* @since v0.11.2
|
|
*/
|
|
cork(): void;
|
|
/**
|
|
* The `writable.uncork()` method flushes all data buffered since {@link cork} was called.
|
|
*
|
|
* When using `writable.cork()` and `writable.uncork()` to manage the buffering
|
|
* of writes to a stream, defer calls to `writable.uncork()` using`process.nextTick()`. Doing so allows batching of all`writable.write()` calls that occur within a given Node.js event
|
|
* loop phase.
|
|
*
|
|
* ```js
|
|
* stream.cork();
|
|
* stream.write('some ');
|
|
* stream.write('data ');
|
|
* process.nextTick(() => stream.uncork());
|
|
* ```
|
|
*
|
|
* If the `writable.cork()` method is called multiple times on a stream, the
|
|
* same number of calls to `writable.uncork()` must be called to flush the buffered
|
|
* data.
|
|
*
|
|
* ```js
|
|
* stream.cork();
|
|
* stream.write('some ');
|
|
* stream.cork();
|
|
* stream.write('data ');
|
|
* process.nextTick(() => {
|
|
* stream.uncork();
|
|
* // The data will not be flushed until uncork() is called a second time.
|
|
* stream.uncork();
|
|
* });
|
|
* ```
|
|
*
|
|
* See also: `writable.cork()`.
|
|
* @since v0.11.2
|
|
*/
|
|
uncork(): void;
|
|
/**
|
|
* Destroy the stream. Optionally emit an `'error'` event, and emit a `'close'`event (unless `emitClose` is set to `false`). After this call, the writable
|
|
* stream has ended and subsequent calls to `write()` or `end()` will result in
|
|
* an `ERR_STREAM_DESTROYED` error.
|
|
* This is a destructive and immediate way to destroy a stream. Previous calls to`write()` may not have drained, and may trigger an `ERR_STREAM_DESTROYED` error.
|
|
* Use `end()` instead of destroy if data should flush before close, or wait for
|
|
* the `'drain'` event before destroying the stream.
|
|
*
|
|
* Once `destroy()` has been called any further calls will be a no-op and no
|
|
* further errors except from `_destroy()` may be emitted as `'error'`.
|
|
*
|
|
* Implementors should not override this method,
|
|
* but instead implement `writable._destroy()`.
|
|
* @since v8.0.0
|
|
* @param error Optional, an error to emit with `'error'` event.
|
|
*/
|
|
destroy(error?: Error): this;
|
|
/**
|
|
* Event emitter
|
|
* The defined events on documents including:
|
|
* 1. close
|
|
* 2. drain
|
|
* 3. error
|
|
* 4. finish
|
|
* 5. pipe
|
|
* 6. unpipe
|
|
*/
|
|
addListener(event: "close", listener: () => void): this;
|
|
addListener(event: "drain", listener: () => void): this;
|
|
addListener(event: "error", listener: (err: Error) => void): this;
|
|
addListener(event: "finish", listener: () => void): this;
|
|
addListener(event: "pipe", listener: (src: Readable) => void): this;
|
|
addListener(event: "unpipe", listener: (src: Readable) => void): this;
|
|
addListener(event: string | symbol, listener: (...args: any[]) => void): this;
|
|
emit(event: "close"): boolean;
|
|
emit(event: "drain"): boolean;
|
|
emit(event: "error", err: Error): boolean;
|
|
emit(event: "finish"): boolean;
|
|
emit(event: "pipe", src: Readable): boolean;
|
|
emit(event: "unpipe", src: Readable): boolean;
|
|
emit(event: string | symbol, ...args: any[]): boolean;
|
|
on(event: "close", listener: () => void): this;
|
|
on(event: "drain", listener: () => void): this;
|
|
on(event: "error", listener: (err: Error) => void): this;
|
|
on(event: "finish", listener: () => void): this;
|
|
on(event: "pipe", listener: (src: Readable) => void): this;
|
|
on(event: "unpipe", listener: (src: Readable) => void): this;
|
|
on(event: string | symbol, listener: (...args: any[]) => void): this;
|
|
once(event: "close", listener: () => void): this;
|
|
once(event: "drain", listener: () => void): this;
|
|
once(event: "error", listener: (err: Error) => void): this;
|
|
once(event: "finish", listener: () => void): this;
|
|
once(event: "pipe", listener: (src: Readable) => void): this;
|
|
once(event: "unpipe", listener: (src: Readable) => void): this;
|
|
once(event: string | symbol, listener: (...args: any[]) => void): this;
|
|
prependListener(event: "close", listener: () => void): this;
|
|
prependListener(event: "drain", listener: () => void): this;
|
|
prependListener(event: "error", listener: (err: Error) => void): this;
|
|
prependListener(event: "finish", listener: () => void): this;
|
|
prependListener(event: "pipe", listener: (src: Readable) => void): this;
|
|
prependListener(event: "unpipe", listener: (src: Readable) => void): this;
|
|
prependListener(event: string | symbol, listener: (...args: any[]) => void): this;
|
|
prependOnceListener(event: "close", listener: () => void): this;
|
|
prependOnceListener(event: "drain", listener: () => void): this;
|
|
prependOnceListener(event: "error", listener: (err: Error) => void): this;
|
|
prependOnceListener(event: "finish", listener: () => void): this;
|
|
prependOnceListener(event: "pipe", listener: (src: Readable) => void): this;
|
|
prependOnceListener(event: "unpipe", listener: (src: Readable) => void): this;
|
|
prependOnceListener(event: string | symbol, listener: (...args: any[]) => void): this;
|
|
removeListener(event: "close", listener: () => void): this;
|
|
removeListener(event: "drain", listener: () => void): this;
|
|
removeListener(event: "error", listener: (err: Error) => void): this;
|
|
removeListener(event: "finish", listener: () => void): this;
|
|
removeListener(event: "pipe", listener: (src: Readable) => void): this;
|
|
removeListener(event: "unpipe", listener: (src: Readable) => void): this;
|
|
removeListener(event: string | symbol, listener: (...args: any[]) => void): this;
|
|
}
|
|
namespace internal {
|
|
class Stream extends internal {
|
|
constructor(opts?: ReadableOptions);
|
|
}
|
|
interface StreamOptions<T extends Stream> extends Abortable {
|
|
emitClose?: boolean | undefined;
|
|
highWaterMark?: number | undefined;
|
|
objectMode?: boolean | undefined;
|
|
construct?(this: T, callback: (error?: Error | null) => void): void;
|
|
destroy?(this: T, error: Error | null, callback: (error?: Error | null) => void): void;
|
|
autoDestroy?: boolean | undefined;
|
|
}
|
|
interface ReadableOptions extends StreamOptions<Readable> {
|
|
encoding?: BufferEncoding | undefined;
|
|
read?(this: Readable, size: number): void;
|
|
}
|
|
/**
|
|
* @since v0.9.4
|
|
*/
|
|
class Readable extends ReadableBase {
|
|
/**
|
|
* A utility method for creating a `Readable` from a web `ReadableStream`.
|
|
* @since v17.0.0
|
|
* @experimental
|
|
*/
|
|
static fromWeb(
|
|
readableStream: streamWeb.ReadableStream,
|
|
options?: Pick<ReadableOptions, "encoding" | "highWaterMark" | "objectMode" | "signal">,
|
|
): Readable;
|
|
/**
|
|
* A utility method for creating a web `ReadableStream` from a `Readable`.
|
|
* @since v17.0.0
|
|
* @experimental
|
|
*/
|
|
static toWeb(streamReadable: Readable): streamWeb.ReadableStream;
|
|
}
|
|
interface WritableOptions extends StreamOptions<Writable> {
|
|
decodeStrings?: boolean | undefined;
|
|
defaultEncoding?: BufferEncoding | undefined;
|
|
write?(
|
|
this: Writable,
|
|
chunk: any,
|
|
encoding: BufferEncoding,
|
|
callback: (error?: Error | null) => void,
|
|
): void;
|
|
writev?(
|
|
this: Writable,
|
|
chunks: Array<{
|
|
chunk: any;
|
|
encoding: BufferEncoding;
|
|
}>,
|
|
callback: (error?: Error | null) => void,
|
|
): void;
|
|
final?(this: Writable, callback: (error?: Error | null) => void): void;
|
|
}
|
|
/**
|
|
* @since v0.9.4
|
|
*/
|
|
class Writable extends WritableBase {
|
|
/**
|
|
* A utility method for creating a `Writable` from a web `WritableStream`.
|
|
* @since v17.0.0
|
|
* @experimental
|
|
*/
|
|
static fromWeb(
|
|
writableStream: streamWeb.WritableStream,
|
|
options?: Pick<WritableOptions, "decodeStrings" | "highWaterMark" | "objectMode" | "signal">,
|
|
): Writable;
|
|
/**
|
|
* A utility method for creating a web `WritableStream` from a `Writable`.
|
|
* @since v17.0.0
|
|
* @experimental
|
|
*/
|
|
static toWeb(streamWritable: Writable): streamWeb.WritableStream;
|
|
}
|
|
interface DuplexOptions extends ReadableOptions, WritableOptions {
|
|
allowHalfOpen?: boolean | undefined;
|
|
readableObjectMode?: boolean | undefined;
|
|
writableObjectMode?: boolean | undefined;
|
|
readableHighWaterMark?: number | undefined;
|
|
writableHighWaterMark?: number | undefined;
|
|
writableCorked?: number | undefined;
|
|
construct?(this: Duplex, callback: (error?: Error | null) => void): void;
|
|
read?(this: Duplex, size: number): void;
|
|
write?(this: Duplex, chunk: any, encoding: BufferEncoding, callback: (error?: Error | null) => void): void;
|
|
writev?(
|
|
this: Duplex,
|
|
chunks: Array<{
|
|
chunk: any;
|
|
encoding: BufferEncoding;
|
|
}>,
|
|
callback: (error?: Error | null) => void,
|
|
): void;
|
|
final?(this: Duplex, callback: (error?: Error | null) => void): void;
|
|
destroy?(this: Duplex, error: Error | null, callback: (error?: Error | null) => void): void;
|
|
}
|
|
/**
|
|
* Duplex streams are streams that implement both the `Readable` and `Writable` interfaces.
|
|
*
|
|
* Examples of `Duplex` streams include:
|
|
*
|
|
* * `TCP sockets`
|
|
* * `zlib streams`
|
|
* * `crypto streams`
|
|
* @since v0.9.4
|
|
*/
|
|
class Duplex extends ReadableBase implements WritableBase {
|
|
readonly writable: boolean;
|
|
readonly writableEnded: boolean;
|
|
readonly writableFinished: boolean;
|
|
readonly writableHighWaterMark: number;
|
|
readonly writableLength: number;
|
|
readonly writableObjectMode: boolean;
|
|
readonly writableCorked: number;
|
|
readonly writableNeedDrain: boolean;
|
|
readonly closed: boolean;
|
|
readonly errored: Error | null;
|
|
/**
|
|
* If `false` then the stream will automatically end the writable side when the
|
|
* readable side ends. Set initially by the `allowHalfOpen` constructor option,
|
|
* which defaults to `true`.
|
|
*
|
|
* This can be changed manually to change the half-open behavior of an existing`Duplex` stream instance, but must be changed before the `'end'` event is
|
|
* emitted.
|
|
* @since v0.9.4
|
|
*/
|
|
allowHalfOpen: boolean;
|
|
constructor(opts?: DuplexOptions);
|
|
/**
|
|
* A utility method for creating duplex streams.
|
|
*
|
|
* - `Stream` converts writable stream into writable `Duplex` and readable stream
|
|
* to `Duplex`.
|
|
* - `Blob` converts into readable `Duplex`.
|
|
* - `string` converts into readable `Duplex`.
|
|
* - `ArrayBuffer` converts into readable `Duplex`.
|
|
* - `AsyncIterable` converts into a readable `Duplex`. Cannot yield `null`.
|
|
* - `AsyncGeneratorFunction` converts into a readable/writable transform
|
|
* `Duplex`. Must take a source `AsyncIterable` as first parameter. Cannot yield
|
|
* `null`.
|
|
* - `AsyncFunction` converts into a writable `Duplex`. Must return
|
|
* either `null` or `undefined`
|
|
* - `Object ({ writable, readable })` converts `readable` and
|
|
* `writable` into `Stream` and then combines them into `Duplex` where the
|
|
* `Duplex` will write to the `writable` and read from the `readable`.
|
|
* - `Promise` converts into readable `Duplex`. Value `null` is ignored.
|
|
*
|
|
* @since v16.8.0
|
|
*/
|
|
static from(
|
|
src:
|
|
| Stream
|
|
| NodeBlob
|
|
| ArrayBuffer
|
|
| string
|
|
| Iterable<any>
|
|
| AsyncIterable<any>
|
|
| AsyncGeneratorFunction
|
|
| Promise<any>
|
|
| Object,
|
|
): Duplex;
|
|
_write(chunk: any, encoding: BufferEncoding, callback: (error?: Error | null) => void): void;
|
|
_writev?(
|
|
chunks: Array<{
|
|
chunk: any;
|
|
encoding: BufferEncoding;
|
|
}>,
|
|
callback: (error?: Error | null) => void,
|
|
): void;
|
|
_destroy(error: Error | null, callback: (error?: Error | null) => void): void;
|
|
_final(callback: (error?: Error | null) => void): void;
|
|
write(chunk: any, encoding?: BufferEncoding, cb?: (error: Error | null | undefined) => void): boolean;
|
|
write(chunk: any, cb?: (error: Error | null | undefined) => void): boolean;
|
|
setDefaultEncoding(encoding: BufferEncoding): this;
|
|
end(cb?: () => void): this;
|
|
end(chunk: any, cb?: () => void): this;
|
|
end(chunk: any, encoding?: BufferEncoding, cb?: () => void): this;
|
|
cork(): void;
|
|
uncork(): void;
|
|
/**
|
|
* A utility method for creating a web `ReadableStream` and `WritableStream` from a `Duplex`.
|
|
* @since v17.0.0
|
|
* @experimental
|
|
*/
|
|
static toWeb(streamDuplex: Duplex): {
|
|
readable: streamWeb.ReadableStream;
|
|
writable: streamWeb.WritableStream;
|
|
};
|
|
/**
|
|
* A utility method for creating a `Duplex` from a web `ReadableStream` and `WritableStream`.
|
|
* @since v17.0.0
|
|
* @experimental
|
|
*/
|
|
static fromWeb(
|
|
duplexStream: {
|
|
readable: streamWeb.ReadableStream;
|
|
writable: streamWeb.WritableStream;
|
|
},
|
|
options?: Pick<
|
|
DuplexOptions,
|
|
"allowHalfOpen" | "decodeStrings" | "encoding" | "highWaterMark" | "objectMode" | "signal"
|
|
>,
|
|
): Duplex;
|
|
/**
|
|
* Event emitter
|
|
* The defined events on documents including:
|
|
* 1. close
|
|
* 2. data
|
|
* 3. drain
|
|
* 4. end
|
|
* 5. error
|
|
* 6. finish
|
|
* 7. pause
|
|
* 8. pipe
|
|
* 9. readable
|
|
* 10. resume
|
|
* 11. unpipe
|
|
*/
|
|
addListener(event: "close", listener: () => void): this;
|
|
addListener(event: "data", listener: (chunk: any) => void): this;
|
|
addListener(event: "drain", listener: () => void): this;
|
|
addListener(event: "end", listener: () => void): this;
|
|
addListener(event: "error", listener: (err: Error) => void): this;
|
|
addListener(event: "finish", listener: () => void): this;
|
|
addListener(event: "pause", listener: () => void): this;
|
|
addListener(event: "pipe", listener: (src: Readable) => void): this;
|
|
addListener(event: "readable", listener: () => void): this;
|
|
addListener(event: "resume", listener: () => void): this;
|
|
addListener(event: "unpipe", listener: (src: Readable) => void): this;
|
|
addListener(event: string | symbol, listener: (...args: any[]) => void): this;
|
|
emit(event: "close"): boolean;
|
|
emit(event: "data", chunk: any): boolean;
|
|
emit(event: "drain"): boolean;
|
|
emit(event: "end"): boolean;
|
|
emit(event: "error", err: Error): boolean;
|
|
emit(event: "finish"): boolean;
|
|
emit(event: "pause"): boolean;
|
|
emit(event: "pipe", src: Readable): boolean;
|
|
emit(event: "readable"): boolean;
|
|
emit(event: "resume"): boolean;
|
|
emit(event: "unpipe", src: Readable): boolean;
|
|
emit(event: string | symbol, ...args: any[]): boolean;
|
|
on(event: "close", listener: () => void): this;
|
|
on(event: "data", listener: (chunk: any) => void): this;
|
|
on(event: "drain", listener: () => void): this;
|
|
on(event: "end", listener: () => void): this;
|
|
on(event: "error", listener: (err: Error) => void): this;
|
|
on(event: "finish", listener: () => void): this;
|
|
on(event: "pause", listener: () => void): this;
|
|
on(event: "pipe", listener: (src: Readable) => void): this;
|
|
on(event: "readable", listener: () => void): this;
|
|
on(event: "resume", listener: () => void): this;
|
|
on(event: "unpipe", listener: (src: Readable) => void): this;
|
|
on(event: string | symbol, listener: (...args: any[]) => void): this;
|
|
once(event: "close", listener: () => void): this;
|
|
once(event: "data", listener: (chunk: any) => void): this;
|
|
once(event: "drain", listener: () => void): this;
|
|
once(event: "end", listener: () => void): this;
|
|
once(event: "error", listener: (err: Error) => void): this;
|
|
once(event: "finish", listener: () => void): this;
|
|
once(event: "pause", listener: () => void): this;
|
|
once(event: "pipe", listener: (src: Readable) => void): this;
|
|
once(event: "readable", listener: () => void): this;
|
|
once(event: "resume", listener: () => void): this;
|
|
once(event: "unpipe", listener: (src: Readable) => void): this;
|
|
once(event: string | symbol, listener: (...args: any[]) => void): this;
|
|
prependListener(event: "close", listener: () => void): this;
|
|
prependListener(event: "data", listener: (chunk: any) => void): this;
|
|
prependListener(event: "drain", listener: () => void): this;
|
|
prependListener(event: "end", listener: () => void): this;
|
|
prependListener(event: "error", listener: (err: Error) => void): this;
|
|
prependListener(event: "finish", listener: () => void): this;
|
|
prependListener(event: "pause", listener: () => void): this;
|
|
prependListener(event: "pipe", listener: (src: Readable) => void): this;
|
|
prependListener(event: "readable", listener: () => void): this;
|
|
prependListener(event: "resume", listener: () => void): this;
|
|
prependListener(event: "unpipe", listener: (src: Readable) => void): this;
|
|
prependListener(event: string | symbol, listener: (...args: any[]) => void): this;
|
|
prependOnceListener(event: "close", listener: () => void): this;
|
|
prependOnceListener(event: "data", listener: (chunk: any) => void): this;
|
|
prependOnceListener(event: "drain", listener: () => void): this;
|
|
prependOnceListener(event: "end", listener: () => void): this;
|
|
prependOnceListener(event: "error", listener: (err: Error) => void): this;
|
|
prependOnceListener(event: "finish", listener: () => void): this;
|
|
prependOnceListener(event: "pause", listener: () => void): this;
|
|
prependOnceListener(event: "pipe", listener: (src: Readable) => void): this;
|
|
prependOnceListener(event: "readable", listener: () => void): this;
|
|
prependOnceListener(event: "resume", listener: () => void): this;
|
|
prependOnceListener(event: "unpipe", listener: (src: Readable) => void): this;
|
|
prependOnceListener(event: string | symbol, listener: (...args: any[]) => void): this;
|
|
removeListener(event: "close", listener: () => void): this;
|
|
removeListener(event: "data", listener: (chunk: any) => void): this;
|
|
removeListener(event: "drain", listener: () => void): this;
|
|
removeListener(event: "end", listener: () => void): this;
|
|
removeListener(event: "error", listener: (err: Error) => void): this;
|
|
removeListener(event: "finish", listener: () => void): this;
|
|
removeListener(event: "pause", listener: () => void): this;
|
|
removeListener(event: "pipe", listener: (src: Readable) => void): this;
|
|
removeListener(event: "readable", listener: () => void): this;
|
|
removeListener(event: "resume", listener: () => void): this;
|
|
removeListener(event: "unpipe", listener: (src: Readable) => void): this;
|
|
removeListener(event: string | symbol, listener: (...args: any[]) => void): this;
|
|
}
|
|
type TransformCallback = (error?: Error | null, data?: any) => void;
|
|
interface TransformOptions extends DuplexOptions {
|
|
construct?(this: Transform, callback: (error?: Error | null) => void): void;
|
|
read?(this: Transform, size: number): void;
|
|
write?(
|
|
this: Transform,
|
|
chunk: any,
|
|
encoding: BufferEncoding,
|
|
callback: (error?: Error | null) => void,
|
|
): void;
|
|
writev?(
|
|
this: Transform,
|
|
chunks: Array<{
|
|
chunk: any;
|
|
encoding: BufferEncoding;
|
|
}>,
|
|
callback: (error?: Error | null) => void,
|
|
): void;
|
|
final?(this: Transform, callback: (error?: Error | null) => void): void;
|
|
destroy?(this: Transform, error: Error | null, callback: (error?: Error | null) => void): void;
|
|
transform?(this: Transform, chunk: any, encoding: BufferEncoding, callback: TransformCallback): void;
|
|
flush?(this: Transform, callback: TransformCallback): void;
|
|
}
|
|
/**
|
|
* Transform streams are `Duplex` streams where the output is in some way
|
|
* related to the input. Like all `Duplex` streams, `Transform` streams
|
|
* implement both the `Readable` and `Writable` interfaces.
|
|
*
|
|
* Examples of `Transform` streams include:
|
|
*
|
|
* * `zlib streams`
|
|
* * `crypto streams`
|
|
* @since v0.9.4
|
|
*/
|
|
class Transform extends Duplex {
|
|
constructor(opts?: TransformOptions);
|
|
_transform(chunk: any, encoding: BufferEncoding, callback: TransformCallback): void;
|
|
_flush(callback: TransformCallback): void;
|
|
}
|
|
/**
|
|
* The `stream.PassThrough` class is a trivial implementation of a `Transform` stream that simply passes the input bytes across to the output. Its purpose is
|
|
* primarily for examples and testing, but there are some use cases where`stream.PassThrough` is useful as a building block for novel sorts of streams.
|
|
*/
|
|
class PassThrough extends Transform {}
|
|
/**
|
|
* A stream to attach a signal to.
|
|
*
|
|
* Attaches an AbortSignal to a readable or writeable stream. This lets code
|
|
* control stream destruction using an `AbortController`.
|
|
*
|
|
* Calling `abort` on the `AbortController` corresponding to the passed`AbortSignal` will behave the same way as calling `.destroy(new AbortError())`on the stream, and `controller.error(new
|
|
* AbortError())` for webstreams.
|
|
*
|
|
* ```js
|
|
* const fs = require('node:fs');
|
|
*
|
|
* const controller = new AbortController();
|
|
* const read = addAbortSignal(
|
|
* controller.signal,
|
|
* fs.createReadStream(('object.json')),
|
|
* );
|
|
* // Later, abort the operation closing the stream
|
|
* controller.abort();
|
|
* ```
|
|
*
|
|
* Or using an `AbortSignal` with a readable stream as an async iterable:
|
|
*
|
|
* ```js
|
|
* const controller = new AbortController();
|
|
* setTimeout(() => controller.abort(), 10_000); // set a timeout
|
|
* const stream = addAbortSignal(
|
|
* controller.signal,
|
|
* fs.createReadStream(('object.json')),
|
|
* );
|
|
* (async () => {
|
|
* try {
|
|
* for await (const chunk of stream) {
|
|
* await process(chunk);
|
|
* }
|
|
* } catch (e) {
|
|
* if (e.name === 'AbortError') {
|
|
* // The operation was cancelled
|
|
* } else {
|
|
* throw e;
|
|
* }
|
|
* }
|
|
* })();
|
|
* ```
|
|
*
|
|
* Or using an `AbortSignal` with a ReadableStream:
|
|
*
|
|
* ```js
|
|
* const controller = new AbortController();
|
|
* const rs = new ReadableStream({
|
|
* start(controller) {
|
|
* controller.enqueue('hello');
|
|
* controller.enqueue('world');
|
|
* controller.close();
|
|
* },
|
|
* });
|
|
*
|
|
* addAbortSignal(controller.signal, rs);
|
|
*
|
|
* finished(rs, (err) => {
|
|
* if (err) {
|
|
* if (err.name === 'AbortError') {
|
|
* // The operation was cancelled
|
|
* }
|
|
* }
|
|
* });
|
|
*
|
|
* const reader = rs.getReader();
|
|
*
|
|
* reader.read().then(({ value, done }) => {
|
|
* console.log(value); // hello
|
|
* console.log(done); // false
|
|
* controller.abort();
|
|
* });
|
|
* ```
|
|
* @since v15.4.0
|
|
* @param signal A signal representing possible cancellation
|
|
* @param stream a stream to attach a signal to
|
|
*/
|
|
function addAbortSignal<T extends Stream>(signal: AbortSignal, stream: T): T;
|
|
/**
|
|
* Returns the default highWaterMark used by streams.
|
|
* Defaults to `16384` (16 KiB), or `16` for `objectMode`.
|
|
* @since v19.9.0
|
|
* @param objectMode
|
|
*/
|
|
function getDefaultHighWaterMark(objectMode: boolean): number;
|
|
/**
|
|
* Sets the default highWaterMark used by streams.
|
|
* @since v19.9.0
|
|
* @param objectMode
|
|
* @param value highWaterMark value
|
|
*/
|
|
function setDefaultHighWaterMark(objectMode: boolean, value: number): void;
|
|
interface FinishedOptions extends Abortable {
|
|
error?: boolean | undefined;
|
|
readable?: boolean | undefined;
|
|
writable?: boolean | undefined;
|
|
}
|
|
/**
|
|
* A readable and/or writable stream/webstream.
|
|
*
|
|
* A function to get notified when a stream is no longer readable, writable
|
|
* or has experienced an error or a premature close event.
|
|
*
|
|
* ```js
|
|
* const { finished } = require('node:stream');
|
|
* const fs = require('node:fs');
|
|
*
|
|
* const rs = fs.createReadStream('archive.tar');
|
|
*
|
|
* finished(rs, (err) => {
|
|
* if (err) {
|
|
* console.error('Stream failed.', err);
|
|
* } else {
|
|
* console.log('Stream is done reading.');
|
|
* }
|
|
* });
|
|
*
|
|
* rs.resume(); // Drain the stream.
|
|
* ```
|
|
*
|
|
* Especially useful in error handling scenarios where a stream is destroyed
|
|
* prematurely (like an aborted HTTP request), and will not emit `'end'`or `'finish'`.
|
|
*
|
|
* The `finished` API provides `promise version`.
|
|
*
|
|
* `stream.finished()` leaves dangling event listeners (in particular`'error'`, `'end'`, `'finish'` and `'close'`) after `callback` has been
|
|
* invoked. The reason for this is so that unexpected `'error'` events (due to
|
|
* incorrect stream implementations) do not cause unexpected crashes.
|
|
* If this is unwanted behavior then the returned cleanup function needs to be
|
|
* invoked in the callback:
|
|
*
|
|
* ```js
|
|
* const cleanup = finished(rs, (err) => {
|
|
* cleanup();
|
|
* // ...
|
|
* });
|
|
* ```
|
|
* @since v10.0.0
|
|
* @param stream A readable and/or writable stream.
|
|
* @param callback A callback function that takes an optional error argument.
|
|
* @return A cleanup function which removes all registered listeners.
|
|
*/
|
|
function finished(
|
|
stream: NodeJS.ReadableStream | NodeJS.WritableStream | NodeJS.ReadWriteStream,
|
|
options: FinishedOptions,
|
|
callback: (err?: NodeJS.ErrnoException | null) => void,
|
|
): () => void;
|
|
function finished(
|
|
stream: NodeJS.ReadableStream | NodeJS.WritableStream | NodeJS.ReadWriteStream,
|
|
callback: (err?: NodeJS.ErrnoException | null) => void,
|
|
): () => void;
|
|
namespace finished {
|
|
function __promisify__(
|
|
stream: NodeJS.ReadableStream | NodeJS.WritableStream | NodeJS.ReadWriteStream,
|
|
options?: FinishedOptions,
|
|
): Promise<void>;
|
|
}
|
|
type PipelineSourceFunction<T> = () => Iterable<T> | AsyncIterable<T>;
|
|
type PipelineSource<T> = Iterable<T> | AsyncIterable<T> | NodeJS.ReadableStream | PipelineSourceFunction<T>;
|
|
type PipelineTransform<S extends PipelineTransformSource<any>, U> =
|
|
| NodeJS.ReadWriteStream
|
|
| ((
|
|
source: S extends (...args: any[]) => Iterable<infer ST> | AsyncIterable<infer ST> ? AsyncIterable<ST>
|
|
: S,
|
|
) => AsyncIterable<U>);
|
|
type PipelineTransformSource<T> = PipelineSource<T> | PipelineTransform<any, T>;
|
|
type PipelineDestinationIterableFunction<T> = (source: AsyncIterable<T>) => AsyncIterable<any>;
|
|
type PipelineDestinationPromiseFunction<T, P> = (source: AsyncIterable<T>) => Promise<P>;
|
|
type PipelineDestination<S extends PipelineTransformSource<any>, P> = S extends
|
|
PipelineTransformSource<infer ST> ?
|
|
| NodeJS.WritableStream
|
|
| PipelineDestinationIterableFunction<ST>
|
|
| PipelineDestinationPromiseFunction<ST, P>
|
|
: never;
|
|
type PipelineCallback<S extends PipelineDestination<any, any>> = S extends
|
|
PipelineDestinationPromiseFunction<any, infer P> ? (err: NodeJS.ErrnoException | null, value: P) => void
|
|
: (err: NodeJS.ErrnoException | null) => void;
|
|
type PipelinePromise<S extends PipelineDestination<any, any>> = S extends
|
|
PipelineDestinationPromiseFunction<any, infer P> ? Promise<P> : Promise<void>;
|
|
interface PipelineOptions {
|
|
signal?: AbortSignal | undefined;
|
|
end?: boolean | undefined;
|
|
}
|
|
/**
|
|
* A module method to pipe between streams and generators forwarding errors and
|
|
* properly cleaning up and provide a callback when the pipeline is complete.
|
|
*
|
|
* ```js
|
|
* const { pipeline } = require('node:stream');
|
|
* const fs = require('node:fs');
|
|
* const zlib = require('node:zlib');
|
|
*
|
|
* // Use the pipeline API to easily pipe a series of streams
|
|
* // together and get notified when the pipeline is fully done.
|
|
*
|
|
* // A pipeline to gzip a potentially huge tar file efficiently:
|
|
*
|
|
* pipeline(
|
|
* fs.createReadStream('archive.tar'),
|
|
* zlib.createGzip(),
|
|
* fs.createWriteStream('archive.tar.gz'),
|
|
* (err) => {
|
|
* if (err) {
|
|
* console.error('Pipeline failed.', err);
|
|
* } else {
|
|
* console.log('Pipeline succeeded.');
|
|
* }
|
|
* },
|
|
* );
|
|
* ```
|
|
*
|
|
* The `pipeline` API provides a `promise version`.
|
|
*
|
|
* `stream.pipeline()` will call `stream.destroy(err)` on all streams except:
|
|
*
|
|
* * `Readable` streams which have emitted `'end'` or `'close'`.
|
|
* * `Writable` streams which have emitted `'finish'` or `'close'`.
|
|
*
|
|
* `stream.pipeline()` leaves dangling event listeners on the streams
|
|
* after the `callback` has been invoked. In the case of reuse of streams after
|
|
* failure, this can cause event listener leaks and swallowed errors. If the last
|
|
* stream is readable, dangling event listeners will be removed so that the last
|
|
* stream can be consumed later.
|
|
*
|
|
* `stream.pipeline()` closes all the streams when an error is raised.
|
|
* The `IncomingRequest` usage with `pipeline` could lead to an unexpected behavior
|
|
* once it would destroy the socket without sending the expected response.
|
|
* See the example below:
|
|
*
|
|
* ```js
|
|
* const fs = require('node:fs');
|
|
* const http = require('node:http');
|
|
* const { pipeline } = require('node:stream');
|
|
*
|
|
* const server = http.createServer((req, res) => {
|
|
* const fileStream = fs.createReadStream('./fileNotExist.txt');
|
|
* pipeline(fileStream, res, (err) => {
|
|
* if (err) {
|
|
* console.log(err); // No such file
|
|
* // this message can't be sent once `pipeline` already destroyed the socket
|
|
* return res.end('error!!!');
|
|
* }
|
|
* });
|
|
* });
|
|
* ```
|
|
* @since v10.0.0
|
|
* @param callback Called when the pipeline is fully done.
|
|
*/
|
|
function pipeline<A extends PipelineSource<any>, B extends PipelineDestination<A, any>>(
|
|
source: A,
|
|
destination: B,
|
|
callback?: PipelineCallback<B>,
|
|
): B extends NodeJS.WritableStream ? B : NodeJS.WritableStream;
|
|
function pipeline<
|
|
A extends PipelineSource<any>,
|
|
T1 extends PipelineTransform<A, any>,
|
|
B extends PipelineDestination<T1, any>,
|
|
>(
|
|
source: A,
|
|
transform1: T1,
|
|
destination: B,
|
|
callback?: PipelineCallback<B>,
|
|
): B extends NodeJS.WritableStream ? B : NodeJS.WritableStream;
|
|
function pipeline<
|
|
A extends PipelineSource<any>,
|
|
T1 extends PipelineTransform<A, any>,
|
|
T2 extends PipelineTransform<T1, any>,
|
|
B extends PipelineDestination<T2, any>,
|
|
>(
|
|
source: A,
|
|
transform1: T1,
|
|
transform2: T2,
|
|
destination: B,
|
|
callback?: PipelineCallback<B>,
|
|
): B extends NodeJS.WritableStream ? B : NodeJS.WritableStream;
|
|
function pipeline<
|
|
A extends PipelineSource<any>,
|
|
T1 extends PipelineTransform<A, any>,
|
|
T2 extends PipelineTransform<T1, any>,
|
|
T3 extends PipelineTransform<T2, any>,
|
|
B extends PipelineDestination<T3, any>,
|
|
>(
|
|
source: A,
|
|
transform1: T1,
|
|
transform2: T2,
|
|
transform3: T3,
|
|
destination: B,
|
|
callback?: PipelineCallback<B>,
|
|
): B extends NodeJS.WritableStream ? B : NodeJS.WritableStream;
|
|
function pipeline<
|
|
A extends PipelineSource<any>,
|
|
T1 extends PipelineTransform<A, any>,
|
|
T2 extends PipelineTransform<T1, any>,
|
|
T3 extends PipelineTransform<T2, any>,
|
|
T4 extends PipelineTransform<T3, any>,
|
|
B extends PipelineDestination<T4, any>,
|
|
>(
|
|
source: A,
|
|
transform1: T1,
|
|
transform2: T2,
|
|
transform3: T3,
|
|
transform4: T4,
|
|
destination: B,
|
|
callback?: PipelineCallback<B>,
|
|
): B extends NodeJS.WritableStream ? B : NodeJS.WritableStream;
|
|
function pipeline(
|
|
streams: ReadonlyArray<NodeJS.ReadableStream | NodeJS.WritableStream | NodeJS.ReadWriteStream>,
|
|
callback?: (err: NodeJS.ErrnoException | null) => void,
|
|
): NodeJS.WritableStream;
|
|
function pipeline(
|
|
stream1: NodeJS.ReadableStream,
|
|
stream2: NodeJS.ReadWriteStream | NodeJS.WritableStream,
|
|
...streams: Array<
|
|
NodeJS.ReadWriteStream | NodeJS.WritableStream | ((err: NodeJS.ErrnoException | null) => void)
|
|
>
|
|
): NodeJS.WritableStream;
|
|
namespace pipeline {
|
|
function __promisify__<A extends PipelineSource<any>, B extends PipelineDestination<A, any>>(
|
|
source: A,
|
|
destination: B,
|
|
options?: PipelineOptions,
|
|
): PipelinePromise<B>;
|
|
function __promisify__<
|
|
A extends PipelineSource<any>,
|
|
T1 extends PipelineTransform<A, any>,
|
|
B extends PipelineDestination<T1, any>,
|
|
>(
|
|
source: A,
|
|
transform1: T1,
|
|
destination: B,
|
|
options?: PipelineOptions,
|
|
): PipelinePromise<B>;
|
|
function __promisify__<
|
|
A extends PipelineSource<any>,
|
|
T1 extends PipelineTransform<A, any>,
|
|
T2 extends PipelineTransform<T1, any>,
|
|
B extends PipelineDestination<T2, any>,
|
|
>(
|
|
source: A,
|
|
transform1: T1,
|
|
transform2: T2,
|
|
destination: B,
|
|
options?: PipelineOptions,
|
|
): PipelinePromise<B>;
|
|
function __promisify__<
|
|
A extends PipelineSource<any>,
|
|
T1 extends PipelineTransform<A, any>,
|
|
T2 extends PipelineTransform<T1, any>,
|
|
T3 extends PipelineTransform<T2, any>,
|
|
B extends PipelineDestination<T3, any>,
|
|
>(
|
|
source: A,
|
|
transform1: T1,
|
|
transform2: T2,
|
|
transform3: T3,
|
|
destination: B,
|
|
options?: PipelineOptions,
|
|
): PipelinePromise<B>;
|
|
function __promisify__<
|
|
A extends PipelineSource<any>,
|
|
T1 extends PipelineTransform<A, any>,
|
|
T2 extends PipelineTransform<T1, any>,
|
|
T3 extends PipelineTransform<T2, any>,
|
|
T4 extends PipelineTransform<T3, any>,
|
|
B extends PipelineDestination<T4, any>,
|
|
>(
|
|
source: A,
|
|
transform1: T1,
|
|
transform2: T2,
|
|
transform3: T3,
|
|
transform4: T4,
|
|
destination: B,
|
|
options?: PipelineOptions,
|
|
): PipelinePromise<B>;
|
|
function __promisify__(
|
|
streams: ReadonlyArray<NodeJS.ReadableStream | NodeJS.WritableStream | NodeJS.ReadWriteStream>,
|
|
options?: PipelineOptions,
|
|
): Promise<void>;
|
|
function __promisify__(
|
|
stream1: NodeJS.ReadableStream,
|
|
stream2: NodeJS.ReadWriteStream | NodeJS.WritableStream,
|
|
...streams: Array<NodeJS.ReadWriteStream | NodeJS.WritableStream | PipelineOptions>
|
|
): Promise<void>;
|
|
}
|
|
interface Pipe {
|
|
close(): void;
|
|
hasRef(): boolean;
|
|
ref(): void;
|
|
unref(): void;
|
|
}
|
|
/**
|
|
* Returns whether the stream has encountered an error.
|
|
* @since v17.3.0, v16.14.0
|
|
* @experimental
|
|
*/
|
|
function isErrored(stream: Readable | Writable | NodeJS.ReadableStream | NodeJS.WritableStream): boolean;
|
|
/**
|
|
* Returns whether the stream is readable.
|
|
* @since v17.4.0, v16.14.0
|
|
* @experimental
|
|
*/
|
|
function isReadable(stream: Readable | NodeJS.ReadableStream): boolean;
|
|
const promises: typeof streamPromises;
|
|
const consumers: typeof streamConsumers;
|
|
}
|
|
export = internal;
|
|
}
|
|
declare module "node:stream" {
|
|
import stream = require("stream");
|
|
export = stream;
|
|
}
|