Add http-based client to tunnel server

Author: janekbaraniewski

pkg/agent/tunnelserver/client.go

@@ -6,6 +6,7 @@ import (
 	"net"
 
 	"github.com/loft-sh/devpod/pkg/agent/tunnel"
+	"github.com/loft-sh/devpod/pkg/daemon/workspace/network"
 	"github.com/loft-sh/devpod/pkg/stdio"
 	"google.golang.org/grpc"
 	"google.golang.org/grpc/credentials/insecure"
@@ -34,3 +35,24 @@ func NewTunnelClient(reader io.Reader, writer io.WriteCloser, exitOnClose bool,
 
 	return c, nil
 }
+
+// NewTunnelClient creates a gRPC tunnel client that connects via the Unix domain socket,
+// using the shared dialer from the network package.
+func NewHTTPTunnelClient(_ io.Reader, _ io.WriteCloser, _ bool, _ int) (tunnel.TunnelClient, error) {
+	// After moving from deprecated grpc.Dial to grpc.NewClient we need to setup resolver first
+	// https://github.com/grpc/grpc-go/issues/1786#issuecomment-2119088770
+	resolver.SetDefaultScheme("passthrough")
+
+	// Set up a connection to the server.
+	conn, err := grpc.NewClient("",
+		grpc.WithTransportCredentials(insecure.NewCredentials()),
+		grpc.WithContextDialer(network.GetContextDialer()),
+	)
+	if err != nil {
+		return nil, err
+	}
+
+	c := tunnel.NewTunnelClient(conn)
+
+	return c, nil
+}