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backend/node_modules/light-my-request/lib/form-data.js

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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: ${value.type || 'application/octet-stream'}\r\n\r\n`
+        // header
+        yield textEncoder.encode(header)
+        // body
+        /* istanbul ignore else */
+        if (value.stream) {
+          yield * value.stream()
+        } else {
+          // shouldn't be here since Blob / File should provide .stream
+          // and FormData always convert to USVString
+          /* istanbul ignore next */
+          yield value
+        }
+        yield linebreak
+      }
+    }
+    // end
+    yield textEncoder.encode(`--${boundary}--`)
+  }
+
+  const stream = Readable.from(asyncIterator())
+
+  return {
+    stream,
+    contentType: `multipart/form-data; boundary=${boundary}`
+  }
+}
+
+module.exports.isFormDataLike = isFormDataLike
+module.exports.formDataToStream = formDataToStream