@yume-chan/adb-backend-webusb

Backend for @yume-chan/adb using WebUSB (MDN, Spec) API.

- Use in browser
- Use in Node.js
- AdbWebUsbBackend
- constructor
- connect
- AdbWebUsbBackendManager
- BROWSER
- constructor
- requestDevice
- getDevices
- Note on secure context

Use in browser

| Chrome | Edge | Firefox | Internet Explorer | Safari |
| -------------- | -------------- | ------- | ----------------- | ------ |
| 61¹ | 79¹ | No | No | No |

¹: Chrome for Android is supported, Chrome for iOS is NOT supported.

Use in Node.js

| Node.js | usb NPM Package |
| ------- | ----------------- |
| 10.5 | 2.8.1 |

Node.js doesn't have native support for WebUSB API, but the usb NPM package provides a WebUSB compatible API.

To use a custom WebUSB API implementation, pass it to the constructor of AdbWebUsbBackend, AdbWebUsbBackendManager and AdbWebUsbBackendWatcher via the usb parameter.

AdbWebUsbBackend

$3

``ts
public constructor(
device: USBDevice,
filters: AdbDeviceFilter[] = [ADB_DEFAULT_DEVICE_FILTER]
usb: USB
);
`

Create a new instance of AdbWebBackend using a specified USBDevice instance.

USBDevice and USB types are from WebUSB API.

The filters parameter specifies the classCode, subclassCode and protocolCode to use when searching for ADB interface. The default value is [{ classCode: 0xff, subclassCode: 0x42, protocolCode: 0x1 }], defined by Google.

$3

`ts
public async connect(): Promise<
ReadableWritablePair
>
`

Claim the device and create a pair of AdbPacket streams to the ADB interface.

AdbWebUsbBackendManager

A helper class that wraps the WebUSB API.

$3

`ts
public static readonly BROWSER: AdbWebUsbBackendManager | undefined;
`

Gets the instance of AdbWebUsbBackendManager using browser WebUSB implementation.

May be undefined if the browser does not support WebUSB.

$3

`ts
public constructor(usb: USB);
`

Create a new instance of AdbWebUsbBackendManager using the specified WebUSB API implementation.

$3

`ts
public async requestDevice(
filters: AdbDeviceFilter[] = [ADB_DEFAULT_DEVICE_FILTER]
): Promise
`

Request access to a connected device.
This is a convince method for usb.requestDevice().

The filters parameter must have classCode, subclassCode and protocolCode fields for selecting the ADB interface. It can also have vendorId, productId or serialNumber fields to limit the displayed device list.

Returns an AdbWebUsbBackend instance, or undefined if the user cancelled the picker.

$3

`ts
public async getDevices(
filters: AdbDeviceFilter[] = [ADB_DEFAULT_DEVICE_FILTER]
): Promise
`

Get all connected and authenticated devices.

This is a convince method for usb.getDevices().

Note on secure context

WebUSB requires a secure context (HTTPS).

localhost is considered secure, so local development works. But to access a self-hosted server running on another machine, either add a certificate, or add the domain name to the allowlist on each client machine:

1. Open chrome://flags/#unsafely-treat-insecure-origin-as-secure
2. Add the protocol and domain part of your url (e.g. http://192.168.0.100:9000) to the input box
3. Choose Enable` from the dropdown menu
4. Restart browser