package app import ( "context" "net" "net/http" "strings" "sync" "time" appSpec "forge.cadoles.com/Cadoles/emissary/internal/agent/controller/app/spec" "forge.cadoles.com/Cadoles/emissary/internal/proxy/wildcard" edgeHTTP "forge.cadoles.com/arcad/edge/pkg/http" "gitlab.com/wpetit/goweb/logger" "forge.cadoles.com/arcad/edge/pkg/bundle" "github.com/go-chi/chi/middleware" "github.com/go-chi/chi/v5" "github.com/pkg/errors" _ "forge.cadoles.com/Cadoles/emissary/internal/imports/passwd" ) const defaultCookieDuration time.Duration = 24 * time.Hour type Server struct { bundle bundle.Bundle handlerOptions []edgeHTTP.HandlerOptionFunc server *http.Server serverMutex sync.RWMutex config *appSpec.Config } func (s *Server) Start(ctx context.Context, addr string) (err error) { if s.Running() { if err := s.Stop(); err != nil { return errors.WithStack(err) } } s.serverMutex.Lock() defer s.serverMutex.Unlock() router := chi.NewRouter() router.Use(middleware.RealIP) router.Use(middleware.Logger) router.Use(middleware.Compress(5)) handler := edgeHTTP.NewHandler(s.handlerOptions...) if err := handler.Load(s.bundle); err != nil { return errors.Wrap(err, "could not load app bundle") } if s.config != nil { if s.config.UnexpectedHostRedirect != nil { router.Use(unexpectedHostRedirect( s.config.UnexpectedHostRedirect.HostTarget, s.config.UnexpectedHostRedirect.AcceptedHostPatterns..., )) } } router.Handle("/*", handler) server := &http.Server{ Addr: addr, Handler: router, } go func() { defer func() { if recovered := recover(); recovered != nil { if err, ok := recovered.(error); ok { logger.Error(ctx, err.Error(), logger.E(errors.WithStack(err))) return } panic(recovered) } }() defer func() { if err := s.Stop(); err != nil { panic(errors.WithStack(err)) } }() if err := server.ListenAndServe(); err != nil && !errors.Is(err, http.ErrServerClosed) { panic(errors.WithStack(err)) } }() s.server = server return nil } func (s *Server) Running() bool { s.serverMutex.RLock() defer s.serverMutex.RUnlock() return s.server != nil } func (s *Server) Stop() error { if !s.Running() { return nil } s.serverMutex.Lock() defer s.serverMutex.Unlock() if s.server == nil { return nil } if err := s.server.Close(); err != nil { s.server = nil return errors.WithStack(err) } s.server = nil return nil } func NewServer(bundle bundle.Bundle, config *appSpec.Config, handlerOptions ...edgeHTTP.HandlerOptionFunc) *Server { return &Server{ bundle: bundle, config: config, handlerOptions: handlerOptions, } } func getCookieDomain(r *http.Request) (string, error) { host, _, err := net.SplitHostPort(r.Host) if err != nil { host = r.Host } // If host is an IP address if ip := net.ParseIP(host); ip != nil { return "", nil } // If host is an domain, return top level domain domainParts := strings.Split(host, ".") if len(domainParts) >= 2 { topLevelDomain := strings.Join(domainParts[len(domainParts)-2:], ".") return topLevelDomain, nil } // By default, return host return host, nil } func unexpectedHostRedirect(hostTarget string, acceptedHostPatterns ...string) func(http.Handler) http.Handler { return func(h http.Handler) http.Handler { fn := func(w http.ResponseWriter, r *http.Request) { host, port, err := net.SplitHostPort(r.Host) if err != nil { host = r.Host } matched := wildcard.MatchAny(host, acceptedHostPatterns...) if !matched { url := r.URL url.Host = hostTarget if port != "" { url.Host += ":" + port } http.Redirect(w, r, url.String(), http.StatusTemporaryRedirect) return } h.ServeHTTP(w, r) } return http.HandlerFunc(fn) } }