stream.d.ts
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declare module "stream" {
import * as events from "events";
class internal extends events.EventEmitter {
pipe<T extends NodeJS.WritableStream>(destination: T, options?: { end?: boolean; }): T;
}
namespace internal {
class Stream extends internal {
constructor(opts?: ReadableOptions);
}
interface ReadableOptions {
highWaterMark?: number;
encoding?: BufferEncoding;
objectMode?: boolean;
read?(this: Readable, size: number): void;
destroy?(this: Readable, error: Error | null, callback: (error: Error | null) => void): void;
autoDestroy?: boolean;
}
class Readable extends Stream implements NodeJS.ReadableStream {
/**
* A utility method for creating Readable Streams out of iterators.
*/
static from(iterable: Iterable<any> | AsyncIterable<any>, options?: ReadableOptions): Readable;
readable: boolean;
readonly readableEncoding: BufferEncoding | null;
readonly readableEnded: boolean;
readonly readableFlowing: boolean | null;
readonly readableHighWaterMark: number;
readonly readableLength: number;
readonly readableObjectMode: boolean;
destroyed: boolean;
constructor(opts?: ReadableOptions);
_read(size: number): void;
read(size?: number): any;
setEncoding(encoding: BufferEncoding): this;
pause(): this;
resume(): this;
isPaused(): boolean;
unpipe(destination?: NodeJS.WritableStream): this;
unshift(chunk: any, encoding?: BufferEncoding): void;
wrap(oldStream: NodeJS.ReadableStream): this;
push(chunk: any, encoding?: BufferEncoding): boolean;
_destroy(error: Error | null, callback: (error?: Error | null) => void): void;
destroy(error?: Error): void;
/**
* 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>;
}
interface WritableOptions {
highWaterMark?: number;
decodeStrings?: boolean;
defaultEncoding?: BufferEncoding;
objectMode?: boolean;
emitClose?: boolean;
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;
destroy?(this: Writable, error: Error | null, callback: (error: Error | null) => void): void;
final?(this: Writable, callback: (error?: Error | null) => void): void;
autoDestroy?: boolean;
}
class Writable extends Stream implements NodeJS.WritableStream {
readonly writable: boolean;
readonly writableEnded: boolean;
readonly writableFinished: boolean;
readonly writableHighWaterMark: number;
readonly writableLength: number;
readonly writableObjectMode: boolean;
readonly writableCorked: number;
destroyed: 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;
_destroy(error: Error | null, callback: (error?: Error | null) => void): void;
_final(callback: (error?: Error | null) => void): void;
write(chunk: any, cb?: (error: Error | null | undefined) => void): boolean;
write(chunk: any, encoding: BufferEncoding, cb?: (error: Error | null | undefined) => void): boolean;
setDefaultEncoding(encoding: BufferEncoding): this;
end(cb?: () => void): void;
end(chunk: any, cb?: () => void): void;
end(chunk: any, encoding: BufferEncoding, cb?: () => void): void;
cork(): void;
uncork(): void;
destroy(error?: Error): void;
/**
* 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;
}
interface DuplexOptions extends ReadableOptions, WritableOptions {
allowHalfOpen?: boolean;
readableObjectMode?: boolean;
writableObjectMode?: boolean;
readableHighWaterMark?: number;
writableHighWaterMark?: number;
writableCorked?: number;
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;
}
// Note: Duplex extends both Readable and Writable.
class Duplex extends Readable implements Writable {
readonly writable: boolean;
readonly writableEnded: boolean;
readonly writableFinished: boolean;
readonly writableHighWaterMark: number;
readonly writableLength: number;
readonly writableObjectMode: boolean;
readonly writableCorked: number;
constructor(opts?: DuplexOptions);
_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): void;
end(chunk: any, cb?: () => void): void;
end(chunk: any, encoding?: BufferEncoding, cb?: () => void): void;
cork(): void;
uncork(): void;
}
type TransformCallback = (error?: Error | null, data?: any) => void;
interface TransformOptions extends DuplexOptions {
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;
}
class Transform extends Duplex {
constructor(opts?: TransformOptions);
_transform(chunk: any, encoding: BufferEncoding, callback: TransformCallback): void;
_flush(callback: TransformCallback): void;
}
class PassThrough extends Transform { }
interface FinishedOptions {
error?: boolean;
readable?: boolean;
writable?: boolean;
}
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>;
}
function pipeline<T extends NodeJS.WritableStream>(stream1: NodeJS.ReadableStream, stream2: T, callback?: (err: NodeJS.ErrnoException | null) => void): T;
function pipeline<T extends NodeJS.WritableStream>(stream1: NodeJS.ReadableStream, stream2: NodeJS.ReadWriteStream, stream3: T, callback?: (err: NodeJS.ErrnoException | null) => void): T;
function pipeline<T extends NodeJS.WritableStream>(
stream1: NodeJS.ReadableStream,
stream2: NodeJS.ReadWriteStream,
stream3: NodeJS.ReadWriteStream,
stream4: T,
callback?: (err: NodeJS.ErrnoException | null) => void,
): T;
function pipeline<T extends NodeJS.WritableStream>(
stream1: NodeJS.ReadableStream,
stream2: NodeJS.ReadWriteStream,
stream3: NodeJS.ReadWriteStream,
stream4: NodeJS.ReadWriteStream,
stream5: T,
callback?: (err: NodeJS.ErrnoException | null) => void,
): T;
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__(stream1: NodeJS.ReadableStream, stream2: NodeJS.WritableStream): Promise<void>;
function __promisify__(stream1: NodeJS.ReadableStream, stream2: NodeJS.ReadWriteStream, stream3: NodeJS.WritableStream): Promise<void>;
function __promisify__(stream1: NodeJS.ReadableStream, stream2: NodeJS.ReadWriteStream, stream3: NodeJS.ReadWriteStream, stream4: NodeJS.WritableStream): Promise<void>;
function __promisify__(
stream1: NodeJS.ReadableStream,
stream2: NodeJS.ReadWriteStream,
stream3: NodeJS.ReadWriteStream,
stream4: NodeJS.ReadWriteStream,
stream5: NodeJS.WritableStream,
): Promise<void>;
function __promisify__(streams: ReadonlyArray<NodeJS.ReadableStream | NodeJS.WritableStream | NodeJS.ReadWriteStream>): Promise<void>;
function __promisify__(
stream1: NodeJS.ReadableStream,
stream2: NodeJS.ReadWriteStream | NodeJS.WritableStream,
...streams: Array<NodeJS.ReadWriteStream | NodeJS.WritableStream>,
): Promise<void>;
}
interface Pipe {
close(): void;
hasRef(): boolean;
ref(): void;
unref(): void;
}
}
export = internal;
}