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// Copyright 2018 The go-ethereum Authors
// This file is part of the go-ethereum library.
//
// The go-ethereum library is free software: you can redistribute it and/or modify
// it under the terms of the GNU Lesser General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// The go-ethereum library 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 Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public License
// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
package rpc
import (
"context"
"errors"
"io"
"net"
"os"
"time"
)
// DialStdIO creates a client on stdin/stdout.
func DialStdIO(ctx context.Context) (*Client, error) {
return DialIO(ctx, os.Stdin, os.Stdout)
}
// DialIO creates a client which uses the given IO channels
func DialIO(ctx context.Context, in io.Reader, out io.Writer) (*Client, error) {
return newClient(ctx, func(_ context.Context) (ServerCodec, error) {
return NewJSONCodec(stdioConn{
in: in,
out: out,
}), nil
})
}
type stdioConn struct {
in io.Reader
out io.Writer
}
func (io stdioConn) Read(b []byte) (n int, err error) {
return io.in.Read(b)
}
func (io stdioConn) Write(b []byte) (n int, err error) {
return io.out.Write(b)
}
func (io stdioConn) Close() error {
return nil
}
func (io stdioConn) RemoteAddr() string {
return "/dev/stdin"
}
func (io stdioConn) SetWriteDeadline(t time.Time) error {
return &net.OpError{Op: "set", Net: "stdio", Source: nil, Addr: nil, Err: errors.New("deadline not supported")}
}
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