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pipe.go
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pipe.go
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// Copyright (C) 2023 Gobalsky Labs Limited
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as
// published by the Free Software Foundation, either version 3 of the
// License, or (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.
package pipe
import (
"context"
"fmt"
"net"
"google.golang.org/grpc"
)
type Pipe struct {
ch chan net.Conn
addr Addr
}
func NewPipe(name string) *Pipe {
return &Pipe{
ch: make(chan net.Conn),
addr: Addr{name: name},
}
}
func (p *Pipe) Accept() (net.Conn, error) {
conn, ok := <-p.ch
if !ok {
return nil, fmt.Errorf("connection channel unexpectedly closed")
}
return conn, nil
}
func (p *Pipe) Close() error {
close(p.ch)
return nil
}
func (p *Pipe) Addr() net.Addr {
return &p.addr
}
func (p *Pipe) Dial(ctx context.Context, _ string) (net.Conn, error) {
conn1, conn2 := net.Pipe()
select {
case p.ch <- conn1:
return conn2, nil
case <-ctx.Done():
conn1.Close()
conn2.Close()
return nil, ctx.Err()
}
}
func (p *Pipe) DialGRPC(ctx context.Context, opts ...grpc.DialOption) (*grpc.ClientConn, error) {
newOpts := make([]grpc.DialOption, 0, len(opts)+1)
newOpts = append(newOpts, grpc.WithContextDialer(p.Dial))
newOpts = append(newOpts, opts...)
return grpc.DialContext(ctx, p.Addr().String(), newOpts...)
}