mirror of https://github.com/k3s-io/k3s
91 lines
1.9 KiB
Go
91 lines
1.9 KiB
Go
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/*
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Copyright 2015 The Kubernetes Authors.
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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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http://www.apache.org/licenses/LICENSE-2.0
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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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package configz
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import (
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"encoding/json"
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"fmt"
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"net/http"
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"sync"
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)
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var (
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configsGuard sync.RWMutex
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configs = map[string]*Config{}
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)
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type Config struct {
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val interface{}
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}
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func InstallHandler(m mux) {
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m.Handle("/configz", http.HandlerFunc(handle))
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}
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type mux interface {
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Handle(string, http.Handler)
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}
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func New(name string) (*Config, error) {
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configsGuard.Lock()
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defer configsGuard.Unlock()
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if _, found := configs[name]; found {
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return nil, fmt.Errorf("register config %q twice", name)
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}
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newConfig := Config{}
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configs[name] = &newConfig
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return &newConfig, nil
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}
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func Delete(name string) {
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configsGuard.Lock()
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defer configsGuard.Unlock()
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delete(configs, name)
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}
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func (v *Config) Set(val interface{}) {
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configsGuard.Lock()
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defer configsGuard.Unlock()
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v.val = val
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}
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func (v *Config) MarshalJSON() ([]byte, error) {
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return json.Marshal(v.val)
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}
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func handle(w http.ResponseWriter, r *http.Request) {
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if err := write(w); err != nil {
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http.Error(w, err.Error(), http.StatusInternalServerError)
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}
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}
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func write(w http.ResponseWriter) error {
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var b []byte
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var err error
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func() {
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configsGuard.RLock()
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defer configsGuard.RUnlock()
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b, err = json.Marshal(configs)
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}()
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if err != nil {
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return fmt.Errorf("error marshaling json: %v", err)
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}
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w.Header().Set("Content-Type", "application/json")
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_, err = w.Write(b)
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return err
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}
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