msgpackr-extract is a Node.js native addon designed for highly optimized, C-level extraction of strings from MessagePack binary data. It acts as an optional native acceleration component for the `msgpackr` package, significantly speeding up string deserialization. The current stable version is 3.0.3, with releases often coinciding with updates to its parent project, `msgpackr`, or new Node.js ABI versions. Its key differentiator is its ability to perform partial MessagePack parsing to quickly locate and extract string data, especially leveraging V8's Latin-1 string optimizations by returning contiguous multi-string buffers. This low-level approach offers superior performance for applications heavily processing MessagePack data streams in Node.js environments. It's not a standalone MessagePack parser but a specialized utility for improving string extraction performance.
npm install msgpackr-extractVerified import paths — ran on the pinned version, not inferred.
This example demonstrates how to use `msgpackr-extract` to extract strings from a MessagePack-encoded buffer. It first uses `msgpackr` to create a sample buffer, then calls `extractStrings` to get all strings within a specified range, highlighting its core functionality.
Ensure your environment has necessary build tools (Python, C++ compiler, Node.js development headers). Consider using Docker images with pre-installed build essentials or Node.js versions for which prebuilts are guaranteed. Update `node-gyp` if necessary (`npm install -g node-gyp`).
Update import statements from `const { extractStrings } = require('msgpackr-extract');` to `import { extractStrings } from 'msgpackr-extract';`.Implement a loop or recursive function to repeatedly call `extractStrings`, advancing the `start` offset based on the length of the previously extracted data, until all strings are processed or the end of the buffer is reached.
For full MessagePack encoding and decoding, use a comprehensive library such as `msgpackr` which integrates `msgpackr-extract` for accelerated string handling. Do not attempt to use `msgpackr-extract` for full object deserialization.
Try deleting `node_modules` and `package-lock.json` and reinstalling to force a rebuild (`npm rebuild msgpackr-extract` or `npm install`). If it persists, ensure your Node.js version is widely supported by prebuilts or that your build environment is fully set up.
Install necessary build tools: on Windows, use 'npm install --global windows-build-tools'; on macOS, ensure Xcode Command Line Tools are installed; on Linux, install `build-essential` and `python3`. Verify `node-gyp` is up-to-date (`npm install -g node-gyp`).