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