nodeca/pako
Pako
Pako is a pure JavaScript compression library that ports the C zlib library to JavaScript, providing deflate and gzip compression and decompression capabilities. It runs in both browser and Node.js environments by using typed arrays and universal JavaScript, avoiding platform-specific APIs for cross-platform compatibility.
The library handles data through bitwise operations for Huffman coding and LZ77 matching, and automatically encodes string inputs to UTF-8 before compression while decoding them back on decompression. It supports streaming chunk-based processing, allowing incremental data handling by feeding pieces through a stateful compressor or decompressor with end-of-stream detection.
Pako works with both binary data and JavaScript strings, offering deflate compression and inflate decompression alongside gzip format support for compatibility with standard archive tools. The library processes data using Uint8Array for raw binary input and output, and provides options to decompress directly back to JavaScript strings.
Features
- Deflate Compressors - Compress binary or string data using the deflate algorithm to produce a smaller Uint8Array.
- JavaScript Implementations - JavaScript implementation of deflate compression and decompression for binary and string data.
- Gzip Compression - Wrap compressed output in the gzip format so standard tools and archives can read it.
- Automatic UTF-8 String Compression - Detect string input and encode it to UTF-8 before compression, and decode decompressed UTF-8 data back to a JavaScript string when requested.
- JavaScript Implementations - JavaScript library for compressing and decompressing data in the gzip format.
- Zlib Compression Utilities - Ports the C zlib library to JavaScript using typed arrays and bitwise operations for compression and decompression.
- JavaScript Ports - High-speed port of the zlib compression library to JavaScript, supporting deflate and gzip formats in browsers and Node.js.
- Streaming Compression Engines - Library supporting incremental chunk-based compression and decompression with end-of-stream detection.
- Typed Arrays - Uses Uint8Array for raw binary data input and output, avoiding string conversions for performance.
- Node.js Compression Libraries - Adding deflate and gzip compression to Node.js applications with a pure JavaScript library that matches the zlib API.
- Stateful Compression Streams - Supports incremental data processing by feeding chunks through a stateful compressor or decompressor.
- Bitwise Compression Algorithms - Performs Huffman coding and LZ77 matching using JavaScript bitwise operations for speed.
- Browser-Based Compression Libraries - Compressing and decompressing data directly in the browser using JavaScript, without server round-trips or native plugins.
- Gzip Decompression - Read gzip-encoded input and decompress it back to the original binary data.
- Deflate Decompression - Implements both raw deflate and gzip container formats, enabling compatibility with standard tools.
- Inflate Stream Decompression - Restore compressed data to its original form using the inflate algorithm, returning a Uint8Array or string.
- Node.js Runtime Compatibility - Runs in both browser and Node.js environments by avoiding platform-specific APIs and using universal JavaScript.
- Automatic UTF-8 - Detects string inputs and automatically encodes them to UTF-8 before compression, then decodes back on decompression.
- Compression Encoding Handlers - Encode input strings as UTF-8 before deflating, and decode inflated data back to JavaScript strings.
- String Compression - Encode JavaScript strings as UTF-8 before compressing them with deflate or gzip.
- Decompression to JavaScript Strings - Decode decompressed UTF-8 data back into a JavaScript string using the to: 'string' option.
- Incremental Stream Processing - Process input piece by piece through a streaming interface, allowing compression or decompression of large data without loading it all at once.
- Node.js Browser Emulation - Runs in both browser and Node.js environments by avoiding platform-specific APIs and using universal JavaScript.
- Compression Utilities - High-speed zlib port for pure JavaScript.
- File Compression - High-performance zlib implementation for compression.
- HTTP请求相关 - Listed in the “HTTP请求相关” section of the Awesome Frontend awesome list.
