69 lines
1.4 KiB
Go
69 lines
1.4 KiB
Go
// Copyright (c) 2015, B3log
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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// Package util includes common utilities.
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package util
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import (
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"errors"
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"net"
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)
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type mynet struct{}
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// Network utilities.
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var Net = mynet{}
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// LocalIP gets the first NIC's IP address.
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func (*mynet) LocalIP() (string, error) {
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tt, err := net.Interfaces()
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if err != nil {
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return "", err
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}
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for _, t := range tt {
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aa, err := t.Addrs()
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if err != nil {
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return "", err
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}
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for _, a := range aa {
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switch ip := a.(type) {
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case *net.IPAddr:
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v4 := ip.IP.To4()
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if v4 == nil || v4.IsLoopback() || v4.IsUnspecified() {
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continue
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}
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return v4.String(), nil
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case *net.IPNet:
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v4 := ip.IP.To4()
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if v4 == nil || v4.IsLoopback() || v4.IsUnspecified() {
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continue
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}
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return v4.String(), nil
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default:
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return "", errors.New("cannot find local IP address")
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}
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}
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}
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return "", errors.New("cannot find local IP address")
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}
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