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'use strict' const { randomUUID } = require('node:crypto') const { Readable } = require('node:stream') let textEncoder function isFormDataLike (payload) { return ( payload && typeof payload === 'object' && typeof payload.append === 'function' && typeof payload.delete === 'function' && typeof payload.get === 'function' && typeof payload.getAll === 'function' && typeof payload.has === 'function' && typeof payload.set === 'function' && payload[Symbol.toStringTag] === 'FormData' ) } /* partial code extraction and refactoring of `undici`. MIT License. https://github.com/nodejs/undici/blob/043d8f1a89f606b1db259fc71f4c9bc8eb2aa1e6/lib/web/fetch/LICENSE Reference https://github.com/nodejs/undici/blob/043d8f1a89f606b1db259fc71f4c9bc8eb2aa1e6/lib/web/fetch/body.js#L102-L168 */ function formDataToStream (formdata) { // lazy creation of TextEncoder textEncoder = textEncoder ?? new TextEncoder() // we expect the function argument must be FormData const boundary = `----formdata-${randomUUID()}` const prefix = `--${boundary}\r\nContent-Disposition: form-data` /*! formdata-polyfill. MIT License. Jimmy Wärting <https://jimmy.warting.se/opensource> */ const escape = (str) => str.replace(/\n/g, '%0A').replace(/\r/g, '%0D').replace(/"/g, '%22') const normalizeLinefeeds = (value) => value.replace(/\r?\n|\r/g, '\r\n') const linebreak = new Uint8Array([13, 10]) // '\r\n' async function * asyncIterator () { for (const [name, value] of formdata) { if (typeof value === 'string') { // header yield textEncoder.encode(`${prefix}; name="${escape(normalizeLinefeeds(name))}"\r\n\r\n`) // body yield textEncoder.encode(`${normalizeLinefeeds(value)}\r\n`) } else { let header = `${prefix}; name="${escape(normalizeLinefeeds(name))}"` value.name && (header += `; filename="${escape(value.name)}"`) header += `\r\nContent-Type: ${value.type || 'application/octet-stream'}\r\n\r\n` // header yield textEncoder.encode(header) // body if (value.stream) { yield * value.stream() } /* c8 ignore start */ else { // shouldn't be here since Blob / File should provide .stream // and FormData always convert to USVString yield value } /* c8 ignore stop */ yield linebreak } } // end yield textEncoder.encode(`--${boundary}--`) } const stream = Readable.from(asyncIterator()) return { stream, contentType: `multipart/form-data; boundary=${boundary}` } } module.exports.isFormDataLike = isFormDataLike module.exports.formDataToStream = formDataToStream