github.com/cockroachdb/tools@v0.0.0-20230222021103-a6d27438930d/internal/jsonrpc2_v2/serve_pre116.go (about)

     1  // Copyright 2020 The Go Authors. All rights reserved.
     2  // Use of this source code is governed by a BSD-style
     3  // license that can be found in the LICENSE file.
     4  
     5  //go:build !go1.16
     6  // +build !go1.16
     7  
     8  package jsonrpc2
     9  
    10  import (
    11  	"errors"
    12  	"strings"
    13  )
    14  
    15  // errClosed is an error with the same string as net.ErrClosed,
    16  // which was added in Go 1.16.
    17  var errClosed = errors.New("use of closed network connection")
    18  
    19  // isErrClosed reports whether err ends in the same string as errClosed.
    20  func isErrClosed(err error) bool {
    21  	// As of Go 1.16, this could be 'errors.Is(err, net.ErrClosing)', but
    22  	// unfortunately gopls still requires compatibility with
    23  	// (otherwise-unsupported) older Go versions.
    24  	//
    25  	// In the meantime, this error string has not changed on any supported Go
    26  	// version, and is not expected to change in the future.
    27  	// This is not ideal, but since the worst that could happen here is some
    28  	// superfluous logging, it is acceptable.
    29  	return strings.HasSuffix(err.Error(), "use of closed network connection")
    30  }