Using HTTP/2 Cleartext for a server in Go 1.24

5 days ago

SSE streams have long timeouts, but Google Cloud Run doesn't propagate client disconnects with HTTP/1.1, prompting a switch to HTTP/2.
Cloud Run supports HTTP/2 cleartext (h2c) via 'HTTP/2 with Prior Knowledge', terminating TLS at the frontend.
Go 1.24 simplifies h2c setup by allowing direct configuration on http.Server without external packages, unlike older versions.
Local testing with curl --http2-prior-knowledge verifies h2c functionality before deployment.
Terraform configuration for Cloud Run includes setting container ports, concurrency, and timeouts to support long-lived SSE connections.

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