loopd: fix ALPN issue with Python

guggero · guggero · commit 4e45c2908ac2 · 2021-07-13T22:04:28.000+02:00
There is an open issue for Python gRPC clients that is currently being debugged grpc/grpc#23172 It can be mitigated server-side by specifying h2 in the metadata header.
diff --git a/loopd/config.go b/loopd/config.go
@@ -319,6 +319,7 @@ func getTLSConfig(cfg *Config) (*tls.Config, *credentials.TransportCredentials,
 	}
 
 	tlsCfg := cert.TLSConfFromCert(certData)
+	tlsCfg.NextProtos = []string{"h2"}
 	restCreds, err := credentials.NewClientTLSFromFile(
 		cfg.TLSCertPath, "",
 	)

Original file line number	Diff line number	Diff line change
`@@ -319,6 +319,7 @@ func getTLSConfig(cfg Config) (tls.Config, *credentials.TransportCredentials,`
`319`	`319`	`}`
`320`	`320`
`321`	`321`	`tlsCfg := cert.TLSConfFromCert(certData)`
	`322`	`+ tlsCfg.NextProtos = []string{"h2"}`
`322`	`323`	`restCreds, err := credentials.NewClientTLSFromFile(`
`323`	`324`	`cfg.TLSCertPath, "",`
`324`	`325`	`)`