go.uber.org/yarpc@v1.72.1/internal/yarpctest/hostport.go (about)

     1  // Copyright (c) 2022 Uber Technologies, Inc.
     2  //
     3  // Permission is hereby granted, free of charge, to any person obtaining a copy
     4  // of this software and associated documentation files (the "Software"), to deal
     5  // in the Software without restriction, including without limitation the rights
     6  // to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
     7  // copies of the Software, and to permit persons to whom the Software is
     8  // furnished to do so, subject to the following conditions:
     9  //
    10  // The above copyright notice and this permission notice shall be included in
    11  // all copies or substantial portions of the Software.
    12  //
    13  // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
    14  // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
    15  // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
    16  // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
    17  // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
    18  // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
    19  // THE SOFTWARE.
    20  
    21  package yarpctest
    22  
    23  import (
    24  	"net"
    25  	"strings"
    26  )
    27  
    28  const localhostString = "127.0.0.1"
    29  
    30  // ZeroAddrToHostPort converts a net.Addr created with net.Listen("tcp", ":0")
    31  // to a hostPort string valid to use for Golang versions <= 1.8
    32  //
    33  // See the "net" section in https://golang.org/doc/go1.9#minor_library_changes
    34  // for more details.
    35  func ZeroAddrToHostPort(addr net.Addr) string {
    36  	return ZeroAddrStringToHostPort(addr.String())
    37  }
    38  
    39  // ZeroAddrStringToHostPort converts a string from net.Addr.String() created
    40  // with net.Listen("tcp", ":0") to a hostPort string valid to use for Golang
    41  // versions <= 1.8
    42  //
    43  // See the "net" section in https://golang.org/doc/go1.9#minor_library_changes
    44  // for more details.
    45  func ZeroAddrStringToHostPort(addrString string) string {
    46  	return localhostString + ":" + ZeroAddrStringToPort(addrString)
    47  }
    48  
    49  // ZeroAddrToPort converts a net.Addr created with net.Listen("tcp", ":0")
    50  // to a port string valid to use for Golang versions <= 1.8
    51  //
    52  // See the "net" section in https://golang.org/doc/go1.9#minor_library_changes
    53  // for more details.
    54  func ZeroAddrToPort(addr net.Addr) string {
    55  	return ZeroAddrStringToPort(addr.String())
    56  }
    57  
    58  // ZeroAddrStringToPort converts a string from net.Addr.String() created
    59  // with net.Listen("tcp", ":0") to a port string valid to use for Golang
    60  // versions <= 1.8
    61  //
    62  // See the "net" section in https://golang.org/doc/go1.9#minor_library_changes
    63  // for more details.
    64  func ZeroAddrStringToPort(addrString string) string {
    65  	split := strings.Split(addrString, ":")
    66  	return split[len(split)-1]
    67  }