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sysinfo.go
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sysinfo.go
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// Copyright 2018-2021 CERN
//
// 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.
//
// In applying this license, CERN does not waive the privileges and immunities
// granted to it by virtue of its status as an Intergovernmental Organization
// or submit itself to any jurisdiction.
package sysinfo
import (
"net/http"
"github.com/mitchellh/mapstructure"
"github.com/pkg/errors"
"github.com/rs/zerolog"
"github.com/cs3org/reva/v2/pkg/appctx"
"github.com/cs3org/reva/v2/pkg/rhttp/global"
"github.com/cs3org/reva/v2/pkg/sysinfo"
)
func init() {
global.Register(serviceName, New)
}
type config struct {
Prefix string `mapstructure:"prefix"`
}
type svc struct {
conf *config
}
const (
serviceName = "sysinfo"
)
// Close is called when this service is being stopped.
func (s *svc) Close() error {
return nil
}
// Prefix returns the main endpoint of this service.
func (s *svc) Prefix() string {
return s.conf.Prefix
}
// Unprotected returns all endpoints that can be queried without prior authorization.
func (s *svc) Unprotected() []string {
return []string{"/"}
}
// Handler serves all HTTP requests.
func (s *svc) Handler() http.Handler {
return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
log := appctx.GetLogger(r.Context())
if _, err := w.Write([]byte(s.getJSONData())); err != nil {
log.Err(err).Msg("error writing SysInfo response")
}
})
}
func (s *svc) getJSONData() string {
if data, err := sysinfo.SysInfo.ToJSON(); err == nil {
return data
}
return ""
}
func parseConfig(m map[string]interface{}) (*config, error) {
cfg := &config{}
if err := mapstructure.Decode(m, &cfg); err != nil {
return nil, errors.Wrap(err, "sysinfo: error decoding configuration")
}
applyDefaultConfig(cfg)
return cfg, nil
}
func applyDefaultConfig(conf *config) {
if conf.Prefix == "" {
conf.Prefix = serviceName
}
}
// New returns a new SysInfo service.
func New(m map[string]interface{}, log *zerolog.Logger) (global.Service, error) {
// Prepare the configuration
conf, err := parseConfig(m)
if err != nil {
return nil, err
}
// Create the service
s := &svc{
conf: conf,
}
return s, nil
}