87 lines
1.8 KiB
Go
87 lines
1.8 KiB
Go
/*
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* Copyright 2020 The Dragonfly Authors
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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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*/
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//go:generate mockgen -destination mocks/reachable_mock.go -source reachable.go -package mocks
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package reachable
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import (
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"fmt"
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"net"
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"strings"
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"time"
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)
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const (
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// DefaultPort is the default tcp port.
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DefaultPort = "80"
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// DefaultNetwork is the default network type.
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DefaultNetwork = "tcp"
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// DefaultTimeout is the default dial timeout.
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DefaultTimeout = 1 * time.Second
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)
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type Reachable interface {
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// Check that the address can be accessed.
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Check() error
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}
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type reachable struct {
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address string
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network string
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timeout time.Duration
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}
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type Config struct {
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Address string
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Network string
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Timeout time.Duration
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}
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// New returns a new ReachableInterface interface.
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func New(r *Config) Reachable {
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network := DefaultNetwork
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if r.Network != "" {
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network = r.Network
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}
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timeout := DefaultTimeout
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if r.Timeout != 0 {
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timeout = r.Timeout
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}
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return &reachable{
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address: r.Address,
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network: network,
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timeout: timeout,
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}
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}
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// Check that the address can be accessed.
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func (r *reachable) Check() error {
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if !strings.Contains(r.address, ":") {
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r.address = fmt.Sprintf("%s:%s", r.address, DefaultPort)
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}
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conn, err := net.DialTimeout(r.network, r.address, r.timeout)
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if err != nil {
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return err
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}
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conn.Close()
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return nil
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}
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