94 lines
2.1 KiB
Go
94 lines
2.1 KiB
Go
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package server
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import (
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"context"
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"fmt"
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"net/http"
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"sync"
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"time"
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"github.com/qdm12/golibs/logging"
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)
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type Server interface {
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SetOpenVPNRestart(f func())
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Run(ctx context.Context) error
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}
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type server struct {
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address string
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logger logging.Logger
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restartOpenvpn func()
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sync.RWMutex
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}
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func New(address string, logger logging.Logger) Server {
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return &server{
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address: address,
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logger: logger.WithPrefix("http server: "),
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}
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}
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func (s *server) Run(ctx context.Context) error {
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if s.restartOpenvpn == nil {
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s.logger.Warn("restartOpenvpn function is not set")
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}
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server := http.Server{Addr: s.address, Handler: s.makeHandler()}
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go func() {
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<-ctx.Done()
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shutdownCtx, cancel := context.WithTimeout(context.Background(), 2*time.Second)
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defer cancel()
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if err := server.Shutdown(shutdownCtx); err != nil {
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s.logger.Error("failed shutting down: %s", err)
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}
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}()
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s.logger.Info("listening on %s", s.address)
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return server.ListenAndServe()
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}
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func (s *server) SetOpenVPNRestart(f func()) {
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s.Lock()
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defer s.Unlock()
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s.restartOpenvpn = f
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}
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func (s *server) makeHandler() http.HandlerFunc {
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return func(w http.ResponseWriter, r *http.Request) {
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s.logger.Info("HTTP %s %s", r.Method, r.RequestURI)
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switch r.Method {
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case http.MethodGet:
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switch r.RequestURI {
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case "/openvpn/actions/restart":
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s.RLock()
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defer s.RUnlock()
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if s.restartOpenvpn == nil {
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functionNotSet("restartOpenvpn", s.logger, w)
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return
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}
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s.restartOpenvpn()
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default:
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routeDoesNotExist(s.logger, w, r)
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}
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default:
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routeDoesNotExist(s.logger, w, r)
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}
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}
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}
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func routeDoesNotExist(logger logging.Logger, w http.ResponseWriter, r *http.Request) {
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w.WriteHeader(http.StatusBadRequest)
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_, err := w.Write([]byte(fmt.Sprintf("Nothing here for %s %s", r.Method, r.RequestURI)))
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if err != nil {
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logger.Error(err)
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}
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}
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func functionNotSet(functionName string, logger logging.Logger, w http.ResponseWriter) {
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logger.Error("function %s is not set", functionName)
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w.WriteHeader(http.StatusInternalServerError)
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_, err := w.Write([]byte(fmt.Sprintf("%s function is not set", functionName)))
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if err != nil {
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logger.Error(err)
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}
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}
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