115 lines
2.3 KiB
Go
115 lines
2.3 KiB
Go
// Package transport provides a tunnel transport
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package transport
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import (
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"context"
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"fmt"
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"github.com/unistack-org/micro/v3/network/transport"
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"github.com/unistack-org/micro/v3/network/tunnel"
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)
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type tunTransport struct {
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options transport.Options
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tunnel tunnel.Tunnel
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}
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type tunnelKey struct{}
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type transportKey struct{}
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func (t *tunTransport) Init(opts ...transport.Option) error {
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for _, o := range opts {
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o(&t.options)
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}
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// close the existing tunnel
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if t.tunnel != nil {
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t.tunnel.Close(context.TODO())
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}
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// get the tunnel
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tun, ok := t.options.Context.Value(tunnelKey{}).(tunnel.Tunnel)
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if !ok {
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return fmt.Errorf("tunnel not set")
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}
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// get the transport
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tr, ok := t.options.Context.Value(transportKey{}).(transport.Transport)
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if ok {
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tun.Init(tunnel.Transport(tr))
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}
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// set the tunnel
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t.tunnel = tun
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return nil
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}
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func (t *tunTransport) Dial(ctx context.Context, addr string, opts ...transport.DialOption) (transport.Client, error) {
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if err := t.tunnel.Connect(ctx); err != nil {
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return nil, err
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}
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c, err := t.tunnel.Dial(ctx, addr)
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if err != nil {
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return nil, err
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}
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return c, nil
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}
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func (t *tunTransport) Listen(ctx context.Context, addr string, opts ...transport.ListenOption) (transport.Listener, error) {
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if err := t.tunnel.Connect(ctx); err != nil {
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return nil, err
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}
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l, err := t.tunnel.Listen(ctx, addr)
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if err != nil {
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return nil, err
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}
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return &tunListener{l}, nil
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}
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func (t *tunTransport) Options() transport.Options {
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return t.options
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}
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func (t *tunTransport) String() string {
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return "tunnel"
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}
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// NewTransport honours the initialiser used in
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func NewTransport(opts ...transport.Option) transport.Transport {
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t := &tunTransport{
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options: transport.Options{},
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}
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// initialise
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t.Init(opts...)
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return t
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}
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// WithTunnel sets the internal tunnel
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func WithTunnel(t tunnel.Tunnel) transport.Option {
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return func(o *transport.Options) {
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if o.Context == nil {
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o.Context = context.Background()
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}
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o.Context = context.WithValue(o.Context, tunnelKey{}, t)
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}
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}
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// WithTransport sets the internal transport
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func WithTransport(t transport.Transport) transport.Option {
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return func(o *transport.Options) {
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if o.Context == nil {
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o.Context = context.Background()
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}
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o.Context = context.WithValue(o.Context, transportKey{}, t)
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}
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}
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