# mscdex/busboy

A streaming parser for HTML form data for node.js

Repository: https://github.com/mscdex/busboy
Canonical: https://ross.abutalabs.com/products/busboy
Language: JavaScript
License: MIT
License Family: permissive
Last push: 2024-05-31T20:04:04+00:00

## Health v2 (maintenance only)
Score: 32/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 0, release rhythm 35, longevity 100
- inputs: {"age_days": 4846, "days_push": 824, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: no_releases
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 2999, forks 222 (observed 2026-08-28T04:07:37.392619+00:00)

## What it is
Busboy is a Node.js library that provides a streaming parser for HTML form data, primarily multipart/form-data uploads. It emits events for files and fields so uploads can be processed incrementally without buffering entire requests in memory.

## Use cases
- parse multipart form uploads in a node.js http server
- stream large file uploads to disk without loading them into memory
- extract text fields from submitted html forms
- handle file upload endpoints in express or plain node http
- process incoming form-data requests incrementally

## When to choose
- you need low-level, memory-efficient streaming parsing of multipart/form-data in node.js
- you want fine-grained control over how uploaded files and fields are handled
- you are building your own upload middleware or framework on top of it

## When to avoid
- you want batteries-included upload handling with validation and storage built in (use multer or formidable)
- you are not working with node.js http form data
- you need to parse urlencoded-only forms with simple key-value semantics

## Facets
- artifact type: library
- maturity: stable
- function: parser, file-upload, http-server, middleware
- domain: web-development, backend, files
- platform: -
- tags: multipart, form-data, streaming, file-uploads, nodejs, web-server

## Member repositories
- mscdex/busboy (main) score 32

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:07:37.392619+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-30T07:30:35.729557+00:00, confidence not recorded.
  - readme: https://github.com/mscdex/busboy (fetched 2026-08-28T04:07:37.392619+00:00, sha a278e04dc812)
  - registry_npm: https://registry.npmjs.org/busboy (fetched 2026-08-29T09:46:05.254797+00:00, sha b9c861979ea1)
- Data as of 2026-08-30T08:39:29.467469+00:00.