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package caddy2
import (
"context"
"encoding/json"
"fmt"
"io"
"log"
"net"
"net/http"
"strings"
"sync"
)
var (
cfgEndptSrv *http.Server
cfgEndptSrvMu sync.Mutex
)
// Start starts Caddy's administration endpoint.
func Start(addr string) error {
cfgEndptSrvMu.Lock()
defer cfgEndptSrvMu.Unlock()
ln, err := net.Listen("tcp", addr)
if err != nil {
return err
}
mux := http.NewServeMux()
mux.HandleFunc("/load", handleLoadConfig)
for _, m := range GetModules("admin") {
moduleValue, err := m.New()
if err != nil {
return fmt.Errorf("initializing module '%s': %v", m.Name, err)
}
route := moduleValue.(AdminRoute)
mux.Handle(route.Pattern, route)
}
cfgEndptSrv = &http.Server{
Handler: mux,
}
go cfgEndptSrv.Serve(ln)
return nil
}
// AdminRoute represents a route for the admin endpoint.
type AdminRoute struct {
http.Handler
Pattern string
}
// Stop stops the API endpoint.
func Stop() error {
cfgEndptSrvMu.Lock()
defer cfgEndptSrvMu.Unlock()
if cfgEndptSrv == nil {
return fmt.Errorf("no server")
}
err := cfgEndptSrv.Shutdown(context.Background()) // TODO
if err != nil {
return fmt.Errorf("shutting down server: %v", err)
}
cfgEndptSrv = nil
return nil
}
func handleLoadConfig(w http.ResponseWriter, r *http.Request) {
if r.Method != "POST" {
http.Error(w, http.StatusText(http.StatusMethodNotAllowed), http.StatusMethodNotAllowed)
return
}
if !strings.Contains(r.Header.Get("Content-Type"), "/json") {
http.Error(w, "unacceptable Content-Type", http.StatusBadRequest)
return
}
err := Load(r.Body)
if err != nil {
log.Printf("[ADMIN][ERROR] loading config: %v", err)
http.Error(w, err.Error(), http.StatusBadRequest)
return
}
}
// Load loads a configuration.
func Load(r io.Reader) error {
gc := globalConfig{modules: make(map[string]interface{})}
err := json.NewDecoder(r).Decode(&gc)
if err != nil {
return fmt.Errorf("decoding config: %v", err)
}
for modName, rawMsg := range gc.Modules {
mod, ok := modules[modName]
if !ok {
return fmt.Errorf("unrecognized module: %s", modName)
}
if mod.New != nil {
val, err := mod.New()
if err != nil {
return fmt.Errorf("initializing module '%s': %v", modName, err)
}
err = json.Unmarshal(rawMsg, &val)
if err != nil {
return fmt.Errorf("decoding module config: %s: %v", modName, err)
}
gc.modules[modName] = val
}
}
return nil
}
type globalConfig struct {
TestVal string `json:"testval"`
Modules map[string]json.RawMessage `json:"modules"`
TestArr []string `json:"test_arr"`
modules map[string]interface{}
}
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