https://github.com/thenorthmemory/multipart

Simple and lite of the multipart/form-data implementation.
https://github.com/thenorthmemory/multipart
Last synced: 10 months ago
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Simple and lite of the multipart/form-data implementation.
Host: GitHub
URL: https://github.com/thenorthmemory/multipart
Owner: TheNorthMemory
License: mit
Created: 2022-12-11T01:23:18.000Z (over 3 years ago)
Default Branch: main
Last Pushed: 2022-12-13T14:24:28.000Z (over 3 years ago)
Last Synced: 2024-10-16T11:02:23.407Z (over 1 year ago)
Language: JavaScript
Size: 15.6 KB
Stars: 0
Watchers: 2
Forks: 0
Open Issues: 0
Metadata Files:
- Readme: README.md
- License: LICENSE
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README

          # Multipart

Simple and lite of the `multipart/form-data` implementation. Split from `wechatpay-axios-plugin` project for general usages.

[![release](https://img.shields.io/npm/v/@thenorthmemory/multipart)](https://github.com/TheNorthMemory/multipart/releases)

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## Usage

`npm i @thenorthmemory/multipart`

```js

import Multipart from '@thenorthmemory/multipart';

// buffer style(Synchronous)

(new Multipart())

  .append('a', 1)

  .append('b', '2')

  .append('c', Buffer.from('31'))

  .append('d', JSON.stringify({}), 'any.json')

  .append('e', require('fs').readFileSync('/path/your/file.jpg'), 'file.jpg')

  .getBuffer();

// stream style(Asynchronous)

(new Multipart())

  .append('f', require('fs').createReadStream('/path/your/file2.jpg'), 'file2.jpg')

  .pipe(require('fs').createWriteStream('./file3.jpg'));

```

## API

- [Multipart](#multipart)

  - [Usage](#usage)

  - [API](#api)

    - [new Multipart()](#new-multipart)

    - [multipart.mimeTypes](#multipartmimetypes)

    - [multipart.boundary](#multipartboundary)

    - [multipart.data](#multipartdata)

    - [multipart.indices](#multipartindices)

    - [multipart.getBuffer() ⇒ Buffer](#multipartgetbuffer--buffer)

    - [multipart.getHeaders() ⇒ object.<string, string>](#multipartgetheaders--objectstring-string)

    - [multipart.appendMimeTypes(things) ⇒ this](#multipartappendmimetypesthings--this)

    - [multipart.append(name, value, [filename]) ⇒ this](#multipartappendname-value-filename--this)

    - [multipart.formed(name, value, [filename]) ⇒ Array.<(Buffer\|ReadStream)>](#multipartformedname-value-filename--arraybufferreadstream)

    - [multipart.set(name, value, [filename]) ⇒ this](#multipartsetname-value-filename--this)

    - [multipart.delete(name) ⇒ this](#multipartdeletename--this)

    - [multipart.get(name) ⇒ Buffer \| ReadStream \| undefined](#multipartgetname--buffer--readstream--undefined)

    - [multipart.getAll(name) ⇒ Array.<(Buffer\|ReadStream)>](#multipartgetallname--arraybufferreadstream)

    - [multipart.has(name) ⇒ boolean](#multiparthasname--boolean)

    - [multipart.entries() ⇒ Iterator.<Array.<EntryTuple.<(string\|undefined), (Buffer\|ReadStream)>>>](#multipartentries--iteratorarrayentrytuplestringundefined-bufferreadstream)

    - [multipart.keys() ⇒ Iterator.<(string\|undefined)>](#multipartkeys--iteratorstringundefined)

    - [multipart.values() ⇒ Iterator.<(Buffer\|ReadStream)>](#multipartvalues--iteratorbufferreadstream)

    - [multipart.toString() ⇒ string](#multiparttostring--string)

    - [multipart.flowing([end]) ⇒ Promise.<this>](#multipartflowingend--promisethis)

    - [multipart.pipe(destination, [options]) ⇒ stream.Writable](#multipartpipedestination-options--streamwritable)

  - [License](#license)

### new Multipart()

Create a `multipart/form-data` buffer container for the media(image/video) file uploading.

### multipart.mimeTypes

**Kind**: instance property of [Multipart](#Multipart)  

**Access**: protected  

**Properties**

| Name | Type | Description |

| --- | --- | --- |

| mimeTypes | object.<string, string> | Built-in mime-type mapping |

### multipart.boundary

**Kind**: instance property of [Multipart](#Multipart)  

**Read only**: true  

**Properties**

| Name | Type | Description |

| --- | --- | --- |

| boundary | Buffer | The boundary buffer. |

### multipart.data

**Kind**: instance property of [Multipart](#Multipart)  

**Access**: protected  

**Properties**

| Name | Type | Description |

| --- | --- | --- |

| data | Array.<(Buffer\|ReadStream)> | The Multipart's instance data storage |

### multipart.indices

**Kind**: instance property of [Multipart](#Multipart)  

**Access**: protected  

**Properties**

| Name | Type | Description |

| --- | --- | --- |

| indices | Array.<IndexTuple.<(string\|undefined), number>> | The entities' value indices whose were in [data](#Multipart+data) |

### multipart.getBuffer() ⇒ Buffer

To retrieve the [Miltipart#data](Miltipart#data) buffer

**Kind**: instance method of [Multipart](#Multipart)  

**Returns**: Buffer - - The payload buffer  

### multipart.getHeaders() ⇒ object.<string, string>

To retrieve the `Content-Type` multipart/form-data header

**Kind**: instance method of [Multipart](#Multipart)  

**Returns**: object.<string, string> - - The `Content-Type` header With [boundary](#Multipart+boundary)  

### multipart.appendMimeTypes(things) ⇒ this

Append a customized [Multipart#mimeType](Multipart#mimeType)

**Kind**: instance method of [Multipart](#Multipart)  

**Returns**: this - - The `Multipart` class instance self  

| Param | Type | Description |

| --- | --- | --- |

| things | object.<string, string> | The mime-type |

**Example**  

```js

.appendMimeTypes({p12: 'application/x-pkcs12'})

.appendMimeTypes({txt: 'text/plain'})

```

### multipart.append(name, value, [filename]) ⇒ this

Append data wrapped by [boundary](#Multipart+boundary)

**Kind**: instance method of [Multipart](#Multipart)  

**Returns**: this - - The `Multipart` class instance self  

| Param | Type | Description |

| --- | --- | --- |

| name | string | The field name |

| value | string \| Buffer \| ReadStream | The value |

| [filename] | string | Optional filename, when provided, then append the `Content-Type` after of the `Content-Disposition` |

### multipart.formed(name, value, [filename]) ⇒ Array.<(Buffer\|ReadStream)>

Formed a named value, a filename reported to the server, when a Buffer or FileStream is passed as the second parameter.

**Kind**: instance method of [Multipart](#Multipart)  

**Returns**: Array.<(Buffer\|ReadStream)> - - The part of data  

| Param | Type | Description |

| --- | --- | --- |

| name | string | The field name |

| value | string \| Buffer \| ReadStream | The value |

| [filename] | string | Optional filename, when provided, then append the `Content-Type` after of the `Content-Disposition` |

### multipart.set(name, value, [filename]) ⇒ this

Sets a new value for an existing key inside a [data](#Multipart+data) instance, or adds the key/value if it does not already exist.

**Kind**: instance method of [Multipart](#Multipart)  

**Returns**: this - - The Multipart instance  

| Param | Type | Description |

| --- | --- | --- |

| name | string | The field name |

| value | string \| Buffer \| ReadStream | The value |

| [filename] | string | Optional filename, when provided, then append the `Content-Type` after of the `Content-Disposition` |

### multipart.delete(name) ⇒ this

Deletes a key and its value(s) from a [data](#Multipart+data) instance

**Kind**: instance method of [Multipart](#Multipart)  

**Returns**: this - - The Multipart instance  

| Param | Type | Description |

| --- | --- | --- |

| name | string | The field name |

### multipart.get(name) ⇒ Buffer \| ReadStream \| undefined

Returns the first value associated with a given key from within a [data](#Multipart+data) instance

**Kind**: instance method of [Multipart](#Multipart)  

**Returns**: Buffer \| ReadStream \| undefined - value - The value, undefined means none named key exists  

| Param | Type | Description |

| --- | --- | --- |

| name | string | The field name |

### multipart.getAll(name) ⇒ Array.<(Buffer\|ReadStream)>

Returns all values associated with a given key from within a [data](#Multipart+data) instance

**Kind**: instance method of [Multipart](#Multipart)  

**Returns**: Array.<(Buffer\|ReadStream)> - value(s) - The value(s)  

| Param | Type | Description |

| --- | --- | --- |

| name | string | The field name |

### multipart.has(name) ⇒ boolean

Returns a boolean stating whether a [data](#Multipart+data) instance contains a certain key.

**Kind**: instance method of [Multipart](#Multipart)  

**Returns**: boolean - - True for contains  

| Param | Type | Description |

| --- | --- | --- |

| name | string | The field name |

### multipart.entries() ⇒ Iterator.<Array.<EntryTuple.<(string\|undefined), (Buffer\|ReadStream)>>>

To go through all key/value pairs contained in this [data](#Multipart+data) instance

**Kind**: instance method of [Multipart](#Multipart)  

**Returns**: Iterator.<Array.<EntryTuple.<(string\|undefined), (Buffer\|ReadStream)>>> - - An Array Iterator key/value pairs.  

### multipart.keys() ⇒ Iterator.<(string\|undefined)>

To go through all keys contained in [data](#Multipart+data) instance

**Kind**: instance method of [Multipart](#Multipart)  

**Returns**: Iterator.<(string\|undefined)> - - An Array Iterator key pairs.  

### multipart.values() ⇒ Iterator.<(Buffer\|ReadStream)>

To go through all values contained in [data](#Multipart+data) instance

**Kind**: instance method of [Multipart](#Multipart)  

**Returns**: Iterator.<(Buffer\|ReadStream)> - - An Array Iterator value pairs.  

### multipart.toString() ⇒ string

**Kind**: instance method of [Multipart](#Multipart)  

**Returns**: string - - FormData string  

### multipart.flowing([end]) ⇒ Promise.<this>

Pushing [data](#Multipart+data) into the readable BufferList

**Kind**: instance method of [Multipart](#Multipart)  

**Returns**: Promise.<this> - - The Multipart instance  

| Param | Type | Default | Description |

| --- | --- | --- | --- |

| [end] | boolean | true | End the writer when the reader ends. Default: `true`. Available {@since v0.8.0} |

### multipart.pipe(destination, [options]) ⇒ stream.Writable

Attaches a Writable stream to the [Multipart](#Multipart) instance

## License

[MIT](LICENSE)
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