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518 lines
19 KiB
518 lines
19 KiB
/**
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* The `zlib` module provides compression functionality implemented using Gzip,
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* Deflate/Inflate, and Brotli.
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*
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* To access it:
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*
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* ```js
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* const zlib = require('zlib');
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* ```
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*
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* Compression and decompression are built around the Node.js `Streams API`.
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*
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* Compressing or decompressing a stream (such as a file) can be accomplished by
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* piping the source stream through a `zlib` `Transform` stream into a destination
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* stream:
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*
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* ```js
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* const { createGzip } = require('zlib');
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* const { pipeline } = require('stream');
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* const {
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* createReadStream,
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* createWriteStream
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* } = require('fs');
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*
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* const gzip = createGzip();
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* const source = createReadStream('input.txt');
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* const destination = createWriteStream('input.txt.gz');
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*
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* pipeline(source, gzip, destination, (err) => {
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* if (err) {
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* console.error('An error occurred:', err);
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* process.exitCode = 1;
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* }
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* });
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*
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* // Or, Promisified
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*
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* const { promisify } = require('util');
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* const pipe = promisify(pipeline);
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*
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* async function do_gzip(input, output) {
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* const gzip = createGzip();
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* const source = createReadStream(input);
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* const destination = createWriteStream(output);
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* await pipe(source, gzip, destination);
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* }
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*
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* do_gzip('input.txt', 'input.txt.gz')
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* .catch((err) => {
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* console.error('An error occurred:', err);
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* process.exitCode = 1;
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* });
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* ```
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*
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* It is also possible to compress or decompress data in a single step:
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*
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* ```js
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* const { deflate, unzip } = require('zlib');
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*
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* const input = '.................................';
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* deflate(input, (err, buffer) => {
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* if (err) {
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* console.error('An error occurred:', err);
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* process.exitCode = 1;
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* }
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* console.log(buffer.toString('base64'));
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* });
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*
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* const buffer = Buffer.from('eJzT0yMAAGTvBe8=', 'base64');
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* unzip(buffer, (err, buffer) => {
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* if (err) {
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* console.error('An error occurred:', err);
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* process.exitCode = 1;
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* }
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* console.log(buffer.toString());
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* });
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*
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* // Or, Promisified
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*
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* const { promisify } = require('util');
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* const do_unzip = promisify(unzip);
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*
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* do_unzip(buffer)
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* .then((buf) => console.log(buf.toString()))
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* .catch((err) => {
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* console.error('An error occurred:', err);
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* process.exitCode = 1;
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* });
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* ```
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* @since v0.5.8
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* @see [source](https://github.com/nodejs/node/blob/v18.0.0/lib/zlib.js)
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*/
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declare module 'zlib' {
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import * as stream from 'node:stream';
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interface ZlibOptions {
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/**
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* @default constants.Z_NO_FLUSH
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*/
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flush?: number | undefined;
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/**
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* @default constants.Z_FINISH
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*/
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finishFlush?: number | undefined;
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/**
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* @default 16*1024
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*/
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chunkSize?: number | undefined;
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windowBits?: number | undefined;
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level?: number | undefined; // compression only
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memLevel?: number | undefined; // compression only
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strategy?: number | undefined; // compression only
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dictionary?: NodeJS.ArrayBufferView | ArrayBuffer | undefined; // deflate/inflate only, empty dictionary by default
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info?: boolean | undefined;
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maxOutputLength?: number | undefined;
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}
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interface BrotliOptions {
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/**
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* @default constants.BROTLI_OPERATION_PROCESS
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*/
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flush?: number | undefined;
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/**
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* @default constants.BROTLI_OPERATION_FINISH
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*/
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finishFlush?: number | undefined;
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/**
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* @default 16*1024
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*/
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chunkSize?: number | undefined;
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params?:
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| {
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/**
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* Each key is a `constants.BROTLI_*` constant.
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*/
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[key: number]: boolean | number;
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}
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| undefined;
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maxOutputLength?: number | undefined;
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}
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interface Zlib {
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/** @deprecated Use bytesWritten instead. */
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readonly bytesRead: number;
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readonly bytesWritten: number;
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shell?: boolean | string | undefined;
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close(callback?: () => void): void;
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flush(kind?: number, callback?: () => void): void;
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flush(callback?: () => void): void;
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}
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interface ZlibParams {
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params(level: number, strategy: number, callback: () => void): void;
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}
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interface ZlibReset {
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reset(): void;
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}
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interface BrotliCompress extends stream.Transform, Zlib {}
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interface BrotliDecompress extends stream.Transform, Zlib {}
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interface Gzip extends stream.Transform, Zlib {}
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interface Gunzip extends stream.Transform, Zlib {}
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interface Deflate extends stream.Transform, Zlib, ZlibReset, ZlibParams {}
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interface Inflate extends stream.Transform, Zlib, ZlibReset {}
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interface DeflateRaw extends stream.Transform, Zlib, ZlibReset, ZlibParams {}
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interface InflateRaw extends stream.Transform, Zlib, ZlibReset {}
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interface Unzip extends stream.Transform, Zlib {}
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/**
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* Creates and returns a new `BrotliCompress` object.
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* @since v11.7.0, v10.16.0
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*/
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function createBrotliCompress(options?: BrotliOptions): BrotliCompress;
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/**
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* Creates and returns a new `BrotliDecompress` object.
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* @since v11.7.0, v10.16.0
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*/
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function createBrotliDecompress(options?: BrotliOptions): BrotliDecompress;
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/**
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* Creates and returns a new `Gzip` object.
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* See `example`.
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* @since v0.5.8
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*/
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function createGzip(options?: ZlibOptions): Gzip;
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/**
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* Creates and returns a new `Gunzip` object.
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* @since v0.5.8
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*/
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function createGunzip(options?: ZlibOptions): Gunzip;
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/**
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* Creates and returns a new `Deflate` object.
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* @since v0.5.8
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*/
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function createDeflate(options?: ZlibOptions): Deflate;
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/**
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* Creates and returns a new `Inflate` object.
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* @since v0.5.8
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*/
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function createInflate(options?: ZlibOptions): Inflate;
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/**
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* Creates and returns a new `DeflateRaw` object.
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*
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* An upgrade of zlib from 1.2.8 to 1.2.11 changed behavior when `windowBits`is set to 8 for raw deflate streams. zlib would automatically set `windowBits`to 9 if was initially set to 8\. Newer
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* versions of zlib will throw an exception,
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* so Node.js restored the original behavior of upgrading a value of 8 to 9,
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* since passing `windowBits = 9` to zlib actually results in a compressed stream
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* that effectively uses an 8-bit window only.
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* @since v0.5.8
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*/
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function createDeflateRaw(options?: ZlibOptions): DeflateRaw;
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/**
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* Creates and returns a new `InflateRaw` object.
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* @since v0.5.8
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*/
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function createInflateRaw(options?: ZlibOptions): InflateRaw;
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/**
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* Creates and returns a new `Unzip` object.
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* @since v0.5.8
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*/
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function createUnzip(options?: ZlibOptions): Unzip;
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type InputType = string | ArrayBuffer | NodeJS.ArrayBufferView;
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type CompressCallback = (error: Error | null, result: Buffer) => void;
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/**
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* @since v11.7.0, v10.16.0
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*/
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function brotliCompress(buf: InputType, options: BrotliOptions, callback: CompressCallback): void;
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function brotliCompress(buf: InputType, callback: CompressCallback): void;
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namespace brotliCompress {
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function __promisify__(buffer: InputType, options?: BrotliOptions): Promise<Buffer>;
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}
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/**
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* Compress a chunk of data with `BrotliCompress`.
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* @since v11.7.0, v10.16.0
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*/
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function brotliCompressSync(buf: InputType, options?: BrotliOptions): Buffer;
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/**
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* @since v11.7.0, v10.16.0
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*/
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function brotliDecompress(buf: InputType, options: BrotliOptions, callback: CompressCallback): void;
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function brotliDecompress(buf: InputType, callback: CompressCallback): void;
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namespace brotliDecompress {
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function __promisify__(buffer: InputType, options?: BrotliOptions): Promise<Buffer>;
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}
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/**
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* Decompress a chunk of data with `BrotliDecompress`.
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* @since v11.7.0, v10.16.0
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*/
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function brotliDecompressSync(buf: InputType, options?: BrotliOptions): Buffer;
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/**
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* @since v0.6.0
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*/
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function deflate(buf: InputType, callback: CompressCallback): void;
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function deflate(buf: InputType, options: ZlibOptions, callback: CompressCallback): void;
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namespace deflate {
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function __promisify__(buffer: InputType, options?: ZlibOptions): Promise<Buffer>;
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}
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/**
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* Compress a chunk of data with `Deflate`.
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* @since v0.11.12
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*/
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function deflateSync(buf: InputType, options?: ZlibOptions): Buffer;
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/**
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* @since v0.6.0
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*/
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function deflateRaw(buf: InputType, callback: CompressCallback): void;
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function deflateRaw(buf: InputType, options: ZlibOptions, callback: CompressCallback): void;
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namespace deflateRaw {
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function __promisify__(buffer: InputType, options?: ZlibOptions): Promise<Buffer>;
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}
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/**
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* Compress a chunk of data with `DeflateRaw`.
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* @since v0.11.12
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*/
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function deflateRawSync(buf: InputType, options?: ZlibOptions): Buffer;
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/**
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* @since v0.6.0
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*/
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function gzip(buf: InputType, callback: CompressCallback): void;
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function gzip(buf: InputType, options: ZlibOptions, callback: CompressCallback): void;
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namespace gzip {
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function __promisify__(buffer: InputType, options?: ZlibOptions): Promise<Buffer>;
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}
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/**
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* Compress a chunk of data with `Gzip`.
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* @since v0.11.12
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*/
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function gzipSync(buf: InputType, options?: ZlibOptions): Buffer;
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/**
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* @since v0.6.0
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*/
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function gunzip(buf: InputType, callback: CompressCallback): void;
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function gunzip(buf: InputType, options: ZlibOptions, callback: CompressCallback): void;
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namespace gunzip {
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function __promisify__(buffer: InputType, options?: ZlibOptions): Promise<Buffer>;
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}
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/**
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* Decompress a chunk of data with `Gunzip`.
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* @since v0.11.12
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*/
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function gunzipSync(buf: InputType, options?: ZlibOptions): Buffer;
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/**
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* @since v0.6.0
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*/
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function inflate(buf: InputType, callback: CompressCallback): void;
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function inflate(buf: InputType, options: ZlibOptions, callback: CompressCallback): void;
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namespace inflate {
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function __promisify__(buffer: InputType, options?: ZlibOptions): Promise<Buffer>;
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}
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/**
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* Decompress a chunk of data with `Inflate`.
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* @since v0.11.12
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*/
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function inflateSync(buf: InputType, options?: ZlibOptions): Buffer;
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/**
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* @since v0.6.0
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*/
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function inflateRaw(buf: InputType, callback: CompressCallback): void;
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function inflateRaw(buf: InputType, options: ZlibOptions, callback: CompressCallback): void;
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namespace inflateRaw {
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function __promisify__(buffer: InputType, options?: ZlibOptions): Promise<Buffer>;
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}
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/**
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* Decompress a chunk of data with `InflateRaw`.
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* @since v0.11.12
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*/
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function inflateRawSync(buf: InputType, options?: ZlibOptions): Buffer;
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/**
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* @since v0.6.0
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*/
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function unzip(buf: InputType, callback: CompressCallback): void;
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function unzip(buf: InputType, options: ZlibOptions, callback: CompressCallback): void;
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namespace unzip {
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function __promisify__(buffer: InputType, options?: ZlibOptions): Promise<Buffer>;
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}
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/**
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* Decompress a chunk of data with `Unzip`.
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* @since v0.11.12
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*/
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function unzipSync(buf: InputType, options?: ZlibOptions): Buffer;
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namespace constants {
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const BROTLI_DECODE: number;
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const BROTLI_DECODER_ERROR_ALLOC_BLOCK_TYPE_TREES: number;
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const BROTLI_DECODER_ERROR_ALLOC_CONTEXT_MAP: number;
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const BROTLI_DECODER_ERROR_ALLOC_CONTEXT_MODES: number;
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const BROTLI_DECODER_ERROR_ALLOC_RING_BUFFER_1: number;
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const BROTLI_DECODER_ERROR_ALLOC_RING_BUFFER_2: number;
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const BROTLI_DECODER_ERROR_ALLOC_TREE_GROUPS: number;
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const BROTLI_DECODER_ERROR_DICTIONARY_NOT_SET: number;
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const BROTLI_DECODER_ERROR_FORMAT_BLOCK_LENGTH_1: number;
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const BROTLI_DECODER_ERROR_FORMAT_BLOCK_LENGTH_2: number;
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const BROTLI_DECODER_ERROR_FORMAT_CL_SPACE: number;
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const BROTLI_DECODER_ERROR_FORMAT_CONTEXT_MAP_REPEAT: number;
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const BROTLI_DECODER_ERROR_FORMAT_DICTIONARY: number;
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const BROTLI_DECODER_ERROR_FORMAT_DISTANCE: number;
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const BROTLI_DECODER_ERROR_FORMAT_EXUBERANT_META_NIBBLE: number;
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const BROTLI_DECODER_ERROR_FORMAT_EXUBERANT_NIBBLE: number;
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const BROTLI_DECODER_ERROR_FORMAT_HUFFMAN_SPACE: number;
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const BROTLI_DECODER_ERROR_FORMAT_PADDING_1: number;
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const BROTLI_DECODER_ERROR_FORMAT_PADDING_2: number;
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const BROTLI_DECODER_ERROR_FORMAT_RESERVED: number;
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const BROTLI_DECODER_ERROR_FORMAT_SIMPLE_HUFFMAN_ALPHABET: number;
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const BROTLI_DECODER_ERROR_FORMAT_SIMPLE_HUFFMAN_SAME: number;
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const BROTLI_DECODER_ERROR_FORMAT_TRANSFORM: number;
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const BROTLI_DECODER_ERROR_FORMAT_WINDOW_BITS: number;
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const BROTLI_DECODER_ERROR_INVALID_ARGUMENTS: number;
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const BROTLI_DECODER_ERROR_UNREACHABLE: number;
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const BROTLI_DECODER_NEEDS_MORE_INPUT: number;
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const BROTLI_DECODER_NEEDS_MORE_OUTPUT: number;
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const BROTLI_DECODER_NO_ERROR: number;
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const BROTLI_DECODER_PARAM_DISABLE_RING_BUFFER_REALLOCATION: number;
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const BROTLI_DECODER_PARAM_LARGE_WINDOW: number;
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const BROTLI_DECODER_RESULT_ERROR: number;
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const BROTLI_DECODER_RESULT_NEEDS_MORE_INPUT: number;
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const BROTLI_DECODER_RESULT_NEEDS_MORE_OUTPUT: number;
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const BROTLI_DECODER_RESULT_SUCCESS: number;
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const BROTLI_DECODER_SUCCESS: number;
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const BROTLI_DEFAULT_MODE: number;
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const BROTLI_DEFAULT_QUALITY: number;
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const BROTLI_DEFAULT_WINDOW: number;
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const BROTLI_ENCODE: number;
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const BROTLI_LARGE_MAX_WINDOW_BITS: number;
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const BROTLI_MAX_INPUT_BLOCK_BITS: number;
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const BROTLI_MAX_QUALITY: number;
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const BROTLI_MAX_WINDOW_BITS: number;
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const BROTLI_MIN_INPUT_BLOCK_BITS: number;
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const BROTLI_MIN_QUALITY: number;
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const BROTLI_MIN_WINDOW_BITS: number;
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const BROTLI_MODE_FONT: number;
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const BROTLI_MODE_GENERIC: number;
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const BROTLI_MODE_TEXT: number;
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const BROTLI_OPERATION_EMIT_METADATA: number;
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const BROTLI_OPERATION_FINISH: number;
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const BROTLI_OPERATION_FLUSH: number;
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const BROTLI_OPERATION_PROCESS: number;
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const BROTLI_PARAM_DISABLE_LITERAL_CONTEXT_MODELING: number;
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const BROTLI_PARAM_LARGE_WINDOW: number;
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const BROTLI_PARAM_LGBLOCK: number;
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const BROTLI_PARAM_LGWIN: number;
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const BROTLI_PARAM_MODE: number;
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const BROTLI_PARAM_NDIRECT: number;
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const BROTLI_PARAM_NPOSTFIX: number;
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const BROTLI_PARAM_QUALITY: number;
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const BROTLI_PARAM_SIZE_HINT: number;
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const DEFLATE: number;
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const DEFLATERAW: number;
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const GUNZIP: number;
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const GZIP: number;
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const INFLATE: number;
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const INFLATERAW: number;
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const UNZIP: number;
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// Allowed flush values.
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const Z_NO_FLUSH: number;
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const Z_PARTIAL_FLUSH: number;
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const Z_SYNC_FLUSH: number;
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const Z_FULL_FLUSH: number;
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const Z_FINISH: number;
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const Z_BLOCK: number;
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const Z_TREES: number;
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// Return codes for the compression/decompression functions.
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// Negative values are errors, positive values are used for special but normal events.
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const Z_OK: number;
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const Z_STREAM_END: number;
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const Z_NEED_DICT: number;
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const Z_ERRNO: number;
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const Z_STREAM_ERROR: number;
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const Z_DATA_ERROR: number;
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const Z_MEM_ERROR: number;
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const Z_BUF_ERROR: number;
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const Z_VERSION_ERROR: number;
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// Compression levels.
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const Z_NO_COMPRESSION: number;
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const Z_BEST_SPEED: number;
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const Z_BEST_COMPRESSION: number;
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const Z_DEFAULT_COMPRESSION: number;
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// Compression strategy.
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const Z_FILTERED: number;
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const Z_HUFFMAN_ONLY: number;
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const Z_RLE: number;
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const Z_FIXED: number;
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const Z_DEFAULT_STRATEGY: number;
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const Z_DEFAULT_WINDOWBITS: number;
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const Z_MIN_WINDOWBITS: number;
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const Z_MAX_WINDOWBITS: number;
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const Z_MIN_CHUNK: number;
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const Z_MAX_CHUNK: number;
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const Z_DEFAULT_CHUNK: number;
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const Z_MIN_MEMLEVEL: number;
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const Z_MAX_MEMLEVEL: number;
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const Z_DEFAULT_MEMLEVEL: number;
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const Z_MIN_LEVEL: number;
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const Z_MAX_LEVEL: number;
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const Z_DEFAULT_LEVEL: number;
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const ZLIB_VERNUM: number;
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}
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// Allowed flush values.
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/** @deprecated Use `constants.Z_NO_FLUSH` */
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const Z_NO_FLUSH: number;
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/** @deprecated Use `constants.Z_PARTIAL_FLUSH` */
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const Z_PARTIAL_FLUSH: number;
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/** @deprecated Use `constants.Z_SYNC_FLUSH` */
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const Z_SYNC_FLUSH: number;
|
|
/** @deprecated Use `constants.Z_FULL_FLUSH` */
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|
const Z_FULL_FLUSH: number;
|
|
/** @deprecated Use `constants.Z_FINISH` */
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|
const Z_FINISH: number;
|
|
/** @deprecated Use `constants.Z_BLOCK` */
|
|
const Z_BLOCK: number;
|
|
/** @deprecated Use `constants.Z_TREES` */
|
|
const Z_TREES: number;
|
|
// Return codes for the compression/decompression functions.
|
|
// Negative values are errors, positive values are used for special but normal events.
|
|
/** @deprecated Use `constants.Z_OK` */
|
|
const Z_OK: number;
|
|
/** @deprecated Use `constants.Z_STREAM_END` */
|
|
const Z_STREAM_END: number;
|
|
/** @deprecated Use `constants.Z_NEED_DICT` */
|
|
const Z_NEED_DICT: number;
|
|
/** @deprecated Use `constants.Z_ERRNO` */
|
|
const Z_ERRNO: number;
|
|
/** @deprecated Use `constants.Z_STREAM_ERROR` */
|
|
const Z_STREAM_ERROR: number;
|
|
/** @deprecated Use `constants.Z_DATA_ERROR` */
|
|
const Z_DATA_ERROR: number;
|
|
/** @deprecated Use `constants.Z_MEM_ERROR` */
|
|
const Z_MEM_ERROR: number;
|
|
/** @deprecated Use `constants.Z_BUF_ERROR` */
|
|
const Z_BUF_ERROR: number;
|
|
/** @deprecated Use `constants.Z_VERSION_ERROR` */
|
|
const Z_VERSION_ERROR: number;
|
|
// Compression levels.
|
|
/** @deprecated Use `constants.Z_NO_COMPRESSION` */
|
|
const Z_NO_COMPRESSION: number;
|
|
/** @deprecated Use `constants.Z_BEST_SPEED` */
|
|
const Z_BEST_SPEED: number;
|
|
/** @deprecated Use `constants.Z_BEST_COMPRESSION` */
|
|
const Z_BEST_COMPRESSION: number;
|
|
/** @deprecated Use `constants.Z_DEFAULT_COMPRESSION` */
|
|
const Z_DEFAULT_COMPRESSION: number;
|
|
// Compression strategy.
|
|
/** @deprecated Use `constants.Z_FILTERED` */
|
|
const Z_FILTERED: number;
|
|
/** @deprecated Use `constants.Z_HUFFMAN_ONLY` */
|
|
const Z_HUFFMAN_ONLY: number;
|
|
/** @deprecated Use `constants.Z_RLE` */
|
|
const Z_RLE: number;
|
|
/** @deprecated Use `constants.Z_FIXED` */
|
|
const Z_FIXED: number;
|
|
/** @deprecated Use `constants.Z_DEFAULT_STRATEGY` */
|
|
const Z_DEFAULT_STRATEGY: number;
|
|
/** @deprecated */
|
|
const Z_BINARY: number;
|
|
/** @deprecated */
|
|
const Z_TEXT: number;
|
|
/** @deprecated */
|
|
const Z_ASCII: number;
|
|
/** @deprecated */
|
|
const Z_UNKNOWN: number;
|
|
/** @deprecated */
|
|
const Z_DEFLATED: number;
|
|
}
|
|
declare module 'node:zlib' {
|
|
export * from 'zlib';
|
|
}
|