github.com/coreos/mantle@v0.13.0/network/neterror/error.go (about)

     1  // Copyright 2016 CoreOS, Inc.
     2  //
     3  // Licensed under the Apache License, Version 2.0 (the "License");
     4  // you may not use this file except in compliance with the License.
     5  // You may obtain a copy of the License at
     6  //
     7  //     http://www.apache.org/licenses/LICENSE-2.0
     8  //
     9  // Unless required by applicable law or agreed to in writing, software
    10  // distributed under the License is distributed on an "AS IS" BASIS,
    11  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    12  // See the License for the specific language governing permissions and
    13  // limitations under the License.
    14  
    15  package neterror
    16  
    17  import (
    18  	"net"
    19  )
    20  
    21  // IsClosed detects if an error is due to a closed network connection,
    22  // working around bug https://github.com/golang/go/issues/4373
    23  func IsClosed(err error) bool {
    24  	if err == nil {
    25  		return false
    26  	}
    27  	if operr, ok := err.(*net.OpError); ok {
    28  		err = operr.Err
    29  	}
    30  	// cry softly
    31  	return err.Error() == "use of closed network connection"
    32  }