Protocol Launcher

Downcast ​

Downcast is a podcast app for iOS, Mac, Apple Watch, and CarPlay. Protocol Launcher allows you to generate official URL scheme links to import podcast feed subscriptions in Downcast.

Usage ​

There are two ways to use this library:

  • On-Demand import from subpaths enables tree-shaking and keeps bundles small.
  • Full Import from the root package is convenient but includes all app modules.

Pick On-Demand for production builds; Full Import is fine for quick scripts or demos.

Select Installation Method

On-Demand
Recommended. Optimized for production.
Full Import
Convenient. Good for quick scripts.

Notes ​

Downcast's official knowledge base documents itpc://, podcast://, feed://, and downcast:// as supported podcast feed URL schemes. When one of those URLs is opened, Downcast attempts to import a subscription for the podcast at that URL.

The subscribe() helper expects a complete URL that already uses one of those documented schemes. The subscribeFeedUrl() helper returns the exact documented Chrome RSS Subscription Extension template: downcast://feed-url=%s.

Downcast Scheme ​

On-Demand
ts
import { open } from 'protocol-launcher/downcast'

const url = open()
Open downcast://

Subscribe with a Feed Scheme ​

On-Demand
ts
import { subscribe } from 'protocol-launcher/downcast'

const url = subscribe({
  url: 'itpc://example.com/podcast/rss',
})
Subscribe with Feed Scheme

Chrome RSS Extension Template ​

On-Demand
ts
import { subscribeFeedUrl } from 'protocol-launcher/downcast'

const url = subscribeFeedUrl()
ts
subscribeFeedUrl()
// => 'downcast://feed-url=%s'

Official Documentation ​