spf13--viper/remote/remote.go

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// Copyright © 2015 Steve Francia <spf@spf13.com>.
//
// Use of this source code is governed by an MIT-style
// license that can be found in the LICENSE file.
// Package remote integrates the remote features of Viper.
package remote
import (
"bytes"
"github.com/spf13/viper"
crypt "github.com/xordataexchange/crypt/config"
"io"
"os"
)
type remoteConfigProvider struct{}
func (rc remoteConfigProvider) Get(rp viper.RemoteProvider) (io.Reader, error) {
cm, err := getConfigManager(rp)
if err != nil {
return nil, err
}
b, err := cm.Get(rp.Path())
if err != nil {
return nil, err
}
return bytes.NewReader(b), nil
}
func (rc remoteConfigProvider) Watch(rp viper.RemoteProvider) (io.Reader, error) {
cm, err := getConfigManager(rp)
if err != nil {
return nil, err
}
resp,err := cm.Get(rp.Path())
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if err != nil {
return nil, err
}
return bytes.NewReader(resp), nil
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}
func (rc remoteConfigProvider) WatchChannel(rp viper.RemoteProvider) (<-chan *crypt.Response, chan bool) {
cm, err := getConfigManager(rp)
if err != nil {
return nil, nil
}
quit := make(chan bool)
return cm.Watch(rp.Path(), quit) ,quit
}
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func getConfigManager(rp viper.RemoteProvider) (crypt.ConfigManager, error) {
var cm crypt.ConfigManager
var err error
if rp.SecretKeyring() != "" {
kr, err := os.Open(rp.SecretKeyring())
defer kr.Close()
if err != nil {
return nil, err
}
if rp.Provider() == "etcd" {
cm, err = crypt.NewEtcdConfigManager([]string{rp.Endpoint()}, kr)
} else {
cm, err = crypt.NewConsulConfigManager([]string{rp.Endpoint()}, kr)
}
} else {
if rp.Provider() == "etcd" {
cm, err = crypt.NewStandardEtcdConfigManager([]string{rp.Endpoint()})
} else {
cm, err = crypt.NewStandardConsulConfigManager([]string{rp.Endpoint()})
}
}
if err != nil {
return nil, err
}
return cm, nil
}
func init() {
viper.RemoteConfig = &remoteConfigProvider{}
}