parser-multipart

Parse multipart/* bodies into response-like parts in browser or Node.js.

Install

npm install parser-multipart
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Parse a response body

import { Parser } from "parser-multipart";

const headers = { 'content-type': 'multipart/mixed; boundary=batch' };
const body = [
  '--batch',
  'Content-Type: application/http',
  'Content-ID: response-1',
  '',
  'HTTP/1.1 200 OK',
  'Content-Type: application/json',
  '',
  '{"ok":true}',
  '--batch--',
].join('\n');
const parser = new Parser(headers);
const responses = parser.parse(body).responses;
console.log(await responses[0].json());
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This prints { ok: true }. The response must have a multipart/* content type with a boundary. For a network response, pass its headers and text to the same parser. In Node.js versions without a global fetch, provide a fetch implementation such as cross-fetch.

For incremental input, call parser.push(line) for each line and parser.push(null) at end, then read parser.responses.

Documentation

API Docs