---
title: "MultipartPart"
source: "https://github.com/remix-run/remix/blob/8905f3943706e1f53696ab83e70a84873cabfc90/packages/multipart-parser/src/lib/future/multipart.ts#L634"
---

# MultipartPart

## Summary

A part of a `multipart/*` HTTP message, yielded as soon as its headers arrive. Its content is
streamed from the message and can be read once, with MultipartPart.body,
MultipartPart.bytes, MultipartPart.text, or `for await...of`.

## Signature

```ts
class MultipartPart {
  constructor(header: Uint8Array, content: PartContent): MultipartPart

  // Accessors
  get body(): ReadableStream<Uint8Array<ArrayBuffer>>
  get bodyUsed(): boolean
  get filename(): string | undefined
  get headers(): MultipartHeaders
  get isFile(): boolean
  get mediaType(): string | undefined
  get name(): string | undefined

  // Methods
  [asyncIterator](): AsyncIterator<Uint8Array<ArrayBuffer>>
  bytes(): Promise<Uint8Array<ArrayBuffer>>
  text(): Promise<string>
}

```

## Constructor

### Parameters

#### `header`

The raw header bytes

#### `content`

The part's content

## Accessors

### `body`

A stream of this part's content. Accessing it starts reading the content, so the next part
isn't yielded until the stream is read to the end, canceled, or errors.

### `bodyUsed`

True once this part's content has been read, a read of it has started, or its
MultipartPart.body has been accessed.

### `filename`

The filename from the part's `Content-Disposition` header, preferring a decoded `filename*`
over `filename` when available. This is untrusted client input without filesystem sanitization.
Do not use it, or a `File.name` derived from it, directly as a filesystem path. Generate a
storage name in your application instead.

### `headers`

The decoded headers associated with this part, keyed by lower-case header name.

### `isFile`

True if this part originated from a file upload.

### `mediaType`

The media type of the part.

### `name`

The name of the part, usually the `name` of the field in the `<form>` that submitted the request.

## Methods

### `[asyncIterator](): AsyncIterator<Uint8Array<ArrayBuffer>>`

Iterates over the chunks of this part's content.



### `bytes(): Promise<Uint8Array<ArrayBuffer>>`

Reads all of this part's content into a single `Uint8Array`.



### `text(): Promise<string>`

Reads all of this part's content as a UTF-8 string. In `multipart/form-data` messages, this is
useful for reading the value of parts that originated from `<input type="text">` fields.

Note: Do not use this for binary data, use `part.body` or `part.bytes()` instead.