Add support for paging (#94)

This patch adds support for the `nextpage_opaque_marker` parameter as
defined in section 5.4 of ETSI GS NFV-SOL 013. A new `NextPageMarker`
field is added to the `ListRequest` and `ListResponse`. The adapter
takes care of encoding and encrypting it, and the handler only needs
to read it from the request or write it to the response. The type of
the field is `[]byte` and the handler that uses it is responsible for
encoding and decoding it if needed.

Related: https://www.etsi.org/deliver/etsi_gs/NFV-SOL/001_099/013/03.05.01_60/gs_NFV-SOL013v030501p.pdf

Signed-off-by: Juan Hernandez <[email protected]>

go.mod

@@ -58,6 +58,7 @@ require (
 	github.com/modern-go/concurrent v0.0.0-20180306012644-bacd9c7ef1dd // indirect
 	github.com/modern-go/reflect2 v1.0.2 // indirect
 	github.com/munnerz/goautoneg v0.0.0-20191010083416-a7dc8b61c822 // indirect
+	github.com/peterhellberg/link v1.2.0 // indirect
 	github.com/pkg/errors v0.9.1 // indirect
 	github.com/prometheus/client_golang v1.16.0 // indirect
 	github.com/prometheus/client_model v0.4.0 // indirect

go.sum

@@ -106,6 +106,8 @@ github.com/onsi/ginkgo/v2 v2.13.0 h1:0jY9lJquiL8fcf3M4LAXN5aMlS/b2BV86HFFPCPMgE4
 github.com/onsi/ginkgo/v2 v2.13.0/go.mod h1:TE309ZR8s5FsKKpuB1YAQYBzCaAfUgatB/xlT/ETL/o=
 github.com/onsi/gomega v1.29.0 h1:KIA/t2t5UBzoirT4H9tsML45GEbo3ouUnBHsCfD2tVg=
 github.com/onsi/gomega v1.29.0/go.mod h1:9sxs+SwGrKI0+PWe4Fxa9tFQQBG5xSsSbMXOI8PPpoQ=
+github.com/peterhellberg/link v1.2.0 h1:UA5pg3Gp/E0F2WdX7GERiNrPQrM1K6CVJUUWfHa4t6c=
+github.com/peterhellberg/link v1.2.0/go.mod h1:gYfAh+oJgQu2SrZHg5hROVRQe1ICoK0/HHJTcE0edxc=
 github.com/pkg/errors v0.8.1/go.mod h1:bwawxfHBFNV+L2hUp1rHADufV3IMtnDRdf1r5NINEl0=
 github.com/pkg/errors v0.9.1 h1:FEBLx1zS214owpjy7qsBeixbURkuhQAwrK5UwLGTwt4=
 github.com/pkg/errors v0.9.1/go.mod h1:bwawxfHBFNV+L2hUp1rHADufV3IMtnDRdf1r5NINEl0=

internal/cmd/server/start_deployment_manager_server.go

@@ -80,6 +80,11 @@ func DeploymentManagerServer() *cobra.Command {
 		[]string{},
 		"Extension to add to deployment managers.",
 	)
+	_ = flags.String(
+		externalAddressFlagName,
+		"",
+		"External address.",
+	)
 	return result
 }
 
@@ -244,6 +249,21 @@ func (c *DeploymentManagerServerCommand) run(cmd *cobra.Command, argv []string)
 		slog.Any("extensions", extensions),
 	)
 
+	// Get the external address:
+	externalAddress, err := flags.GetString(externalAddressFlagName)
+	if err != nil {
+		logger.Error(
+			"Failed to get external address flag",
+			slog.String("flag", externalAddressFlagName),
+			slog.String("error", err.Error()),
+		)
+		return exit.Error(1)
+	}
+	logger.Info(
+		"External address",
+		slog.String("value", externalAddress),
+	)
+
 	// Create the logging wrapper:
 	loggingWrapper, err := logging.NewTransportWrapper().
 		SetLogger(logger).