refactor proxy

Signed-off-by: Christian Richter <crichter@owncloud.com>

extensions/proxy/pkg/server/http/server.go

@@ -0,0 +1,61 @@
+package http
+
+import (
+	"crypto/tls"
+	"os"
+
+	pkgcrypto "github.com/owncloud/ocis/ocis-pkg/crypto"
+	svc "github.com/owncloud/ocis/ocis-pkg/service/http"
+	"github.com/owncloud/ocis/ocis-pkg/version"
+	"go-micro.dev/v4"
+)
+
+// Server initializes the http service and server.
+func Server(opts ...Option) (svc.Service, error) {
+	options := newOptions(opts...)
+	l := options.Logger
+	httpCfg := options.Config.HTTP
+
+	var cer tls.Certificate
+
+	var tlsConfig *tls.Config
+	if options.Config.HTTP.TLS {
+		l.Warn().Msgf("No tls certificate provided, using a generated one")
+		_, certErr := os.Stat(httpCfg.TLSCert)
+		_, keyErr := os.Stat(httpCfg.TLSKey)
+
+		if os.IsNotExist(certErr) || os.IsNotExist(keyErr) {
+			// GenCert has side effects as it writes 2 files to the binary running location
+			if err := pkgcrypto.GenCert(httpCfg.TLSCert, httpCfg.TLSKey, l); err != nil {
+				l.Fatal().Err(err).Msgf("Could not generate test-certificate")
+				os.Exit(1)
+			}
+		}
+
+		cer, certErr = tls.LoadX509KeyPair(httpCfg.TLSCert, httpCfg.TLSKey)
+		if certErr != nil {
+			options.Logger.Fatal().Err(certErr).Msg("Could not setup TLS")
+			os.Exit(1)
+		}
+
+		tlsConfig = &tls.Config{MinVersion: tls.VersionTLS12, Certificates: []tls.Certificate{cer}}
+	}
+	chain := options.Middlewares.Then(options.Handler)
+
+	service := svc.NewService(
+		svc.Name(options.Config.Service.Name),
+		svc.Version(version.String),
+		svc.TLSConfig(tlsConfig),
+		svc.Logger(options.Logger),
+		svc.Address(options.Config.HTTP.Addr),
+		svc.Namespace(options.Config.HTTP.Namespace),
+		svc.Context(options.Context),
+		svc.Flags(options.Flags...),
+	)
+
+	if err := micro.RegisterHandler(service.Server(), chain); err != nil {
+		return svc.Service{}, err
+	}
+
+	return service, nil
+}