How to Configure HTTP/2

You can configure your app to receive HTTP/2 traffic. HTTP/2 is an updated HTTP protocol that was designed to improve the performance of web applications by allowing multiple requests to be sent over a single connection. This allows your app to use gRPC and other HTTP/2 features.

If you’re using SSE, enable HTTP/2 traffic to prevent any issues that may limit the maximum number of open SSE connections. For more details, see the Mozilla documentation.

If you have not configured your app to receive HTTP/2 traffic, App Platform downgrades requests to HTTP/1.1 when relayed to the app’s container.

To configure your app to receive HTTP/2 traffic, update or add the protocol field to the component you want to receive HTTP/2 traffic in your app’s spec file, like this:

name: your-app
services:
- name: grpc-service
  protocol: HTTP2

Once you have updated your app’s spec, the app redeploys with the new configuration and the container receives HTTP/2 traffic as HTTP/2 cleartext (h2c). Your app may require additional configuration to receive HTTP/2 traffic.