ccf11990f1
- race conditions between ctx.Done and waitError channel - Sleep for retry cancels on cancelation of context - Stops the any loop at the start if the context was canceled - Mentions when loops exit - Wait for errors on triggered loop restarts
80 lines
1.9 KiB
Go
80 lines
1.9 KiB
Go
package server
|
|
|
|
import (
|
|
"context"
|
|
"fmt"
|
|
"net/http"
|
|
"sync"
|
|
"time"
|
|
|
|
"github.com/qdm12/golibs/logging"
|
|
)
|
|
|
|
type Server interface {
|
|
Run(ctx context.Context, wg *sync.WaitGroup)
|
|
}
|
|
|
|
type server struct {
|
|
address string
|
|
logger logging.Logger
|
|
restartOpenvpn chan<- struct{}
|
|
restartUnbound chan<- struct{}
|
|
}
|
|
|
|
func New(address string, logger logging.Logger, restartOpenvpn, restartUnbound chan<- struct{}) Server {
|
|
return &server{
|
|
address: address,
|
|
logger: logger.WithPrefix("http server: "),
|
|
restartOpenvpn: restartOpenvpn,
|
|
restartUnbound: restartUnbound,
|
|
}
|
|
}
|
|
|
|
func (s *server) Run(ctx context.Context, wg *sync.WaitGroup) {
|
|
wg.Add(1)
|
|
server := http.Server{Addr: s.address, Handler: s.makeHandler()}
|
|
go func() {
|
|
defer wg.Done()
|
|
<-ctx.Done()
|
|
s.logger.Warn("context canceled: exiting loop")
|
|
defer s.logger.Warn("loop exited")
|
|
shutdownCtx, cancel := context.WithTimeout(context.Background(), 2*time.Second)
|
|
defer cancel()
|
|
if err := server.Shutdown(shutdownCtx); err != nil {
|
|
s.logger.Error("failed shutting down: %s", err)
|
|
}
|
|
}()
|
|
s.logger.Info("listening on %s", s.address)
|
|
err := server.ListenAndServe()
|
|
if err != nil && ctx.Err() != context.Canceled {
|
|
s.logger.Error(err)
|
|
}
|
|
}
|
|
|
|
func (s *server) makeHandler() http.HandlerFunc {
|
|
return func(w http.ResponseWriter, r *http.Request) {
|
|
s.logger.Info("HTTP %s %s", r.Method, r.RequestURI)
|
|
switch r.Method {
|
|
case http.MethodGet:
|
|
switch r.RequestURI {
|
|
case "/openvpn/actions/restart":
|
|
s.restartOpenvpn <- struct{}{}
|
|
case "/unbound/actions/restart":
|
|
s.restartUnbound <- struct{}{}
|
|
default:
|
|
routeDoesNotExist(s.logger, w, r)
|
|
}
|
|
default:
|
|
routeDoesNotExist(s.logger, w, r)
|
|
}
|
|
}
|
|
}
|
|
|
|
func routeDoesNotExist(logger logging.Logger, w http.ResponseWriter, r *http.Request) {
|
|
w.WriteHeader(http.StatusBadRequest)
|
|
_, err := w.Write([]byte(fmt.Sprintf("Nothing here for %s %s", r.Method, r.RequestURI)))
|
|
if err != nil {
|
|
logger.Error(err)
|
|
}
|
|
}
|