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driver_json.go
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driver_json.go
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// Copyright Project Harbor Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package json
import (
"encoding/json"
"io/ioutil"
"os"
"path/filepath"
"sync"
"github.com/goharbor/harbor/src/adminserver/systemcfg/store"
"github.com/goharbor/harbor/src/common/utils/log"
)
const (
// the default path of configuration file
defaultPath = "/etc/harbor/config.json"
)
type cfgStore struct {
path string // the path of cfg file
sync.RWMutex
}
// NewCfgStore returns an instance of cfgStore that stores the configurations
// in a json file. The file will be created if it does not exist.
func NewCfgStore(path ...string) (store.Driver, error) {
p := defaultPath
if len(path) > 0 && len(path[0]) > 0 {
p = path[0]
}
log.Debugf("path of configuration file: %s", p)
if _, err := os.Stat(p); os.IsNotExist(err) {
log.Infof("the configuration file %s does not exist, creating it...", p)
if err = os.MkdirAll(filepath.Dir(p), 0600); err != nil {
return nil, err
}
if err = ioutil.WriteFile(p, []byte{}, 0600); err != nil {
return nil, err
}
}
return &cfgStore{
path: p,
}, nil
}
// Name ...
func (c *cfgStore) Name() string {
return "JSON"
}
// Read ...
func (c *cfgStore) Read() (map[string]interface{}, error) {
c.RLock()
defer c.RUnlock()
return read(c.path)
}
func read(path string) (map[string]interface{}, error) {
b, err := ioutil.ReadFile(path)
if err != nil {
return nil, err
}
// empty file
if len(b) == 0 {
return nil, nil
}
config := map[string]interface{}{}
if err = json.Unmarshal(b, &config); err != nil {
return nil, err
}
return config, nil
}
// Write ...
func (c *cfgStore) Write(config map[string]interface{}) error {
c.Lock()
defer c.Unlock()
cfg, err := read(c.path)
if err != nil {
return err
}
if cfg == nil {
cfg = config
} else {
for k, v := range config {
cfg[k] = v
}
}
b, err := json.MarshalIndent(cfg, "", " ")
if err != nil {
return err
}
return ioutil.WriteFile(c.path, b, 0600)
}