backend: increase default server write timeout (#998)

For the List Messages endpoint that no longer uses
Websockets we have to upper the global write timeout
so that the ListMessages streaming response can
take longer than the current default of 30s.

backend/pkg/config/server.go

@@ -10,6 +10,8 @@
 package config
 
 import (
+	"time"
+
 	"github.com/cloudhut/common/rest"
 )
 
@@ -29,5 +31,13 @@ type Server struct {
 // SetDefaults for server config.
 func (s *Server) SetDefaults() {
 	s.Config.SetDefaults()
+	// We use a timeout of up to 31 minutes in the ListMessages handler for certain requests.
+	// In the future we may be able to use http.NewResponseController to overwrite the global
+	// write timeout only for those routes that require to be run longer, but as of writing this
+	// it is not possible to set this from inside the connect handlers.
+	// References:
+	// 1. https://github.com/connectrpc/connect-go/issues/604
+	// 2. https://github.com/connectrpc/connect-go/issues/356
+	s.HTTPServerWriteTimeout = 32 * time.Minute
 	s.AllowedOrigins = nil
 }