API: Add GetAllOnlineUsers RPC to StatsService for retrieving online users

app/stats/command/command.go

@@ -80,6 +80,12 @@ func (s *statsServer) GetStatsOnlineIpList(ctx context.Context, request *GetStat
 	}, nil
 }
 
+func (s *statsServer) GetAllOnlineUsers(ctx context.Context, request *GetAllOnlineUsersRequest) (*GetAllOnlineUsersResponse, error) {
+	return &GetAllOnlineUsersResponse{
+		Users: s.stats.GetAllOnlineUsers(),
+	}, nil
+}
+
 func (s *statsServer) QueryStats(ctx context.Context, request *QueryStatsRequest) (*QueryStatsResponse, error) {
 	matcher, err := strmatcher.Substr.New(request.Pattern)
 	if err != nil {

app/stats/command/command.proto

@@ -51,12 +51,19 @@ message GetStatsOnlineIpListResponse {
   map<string, int64> ips = 2;
 }
 
+message GetAllOnlineUsersRequest {}
+
+message GetAllOnlineUsersResponse {
+  repeated string users = 1;
+}
+
 service StatsService {
   rpc GetStats(GetStatsRequest) returns (GetStatsResponse) {}
   rpc GetStatsOnline(GetStatsRequest) returns (GetStatsResponse) {}
   rpc QueryStats(QueryStatsRequest) returns (QueryStatsResponse) {}
   rpc GetSysStats(SysStatsRequest) returns (SysStatsResponse) {}
   rpc GetStatsOnlineIpList(GetStatsRequest) returns (GetStatsOnlineIpListResponse) {}
+  rpc GetAllOnlineUsers(GetAllOnlineUsersRequest) returns (GetAllOnlineUsersResponse) {}
 }
 
 message Config {}

app/stats/stats.go

@@ -161,6 +161,21 @@ func (m *Manager) GetChannel(name string) stats.Channel {
 	return nil
 }
 
+// GetAllOnlineUsers implements stats.Manager.
+func (m *Manager) GetAllOnlineUsers() []string {
+	m.access.Lock()
+	defer m.access.Unlock()
+
+	usersOnline := make([]string, 0, len(m.onlineMap))
+	for user, onlineMap := range m.onlineMap {
+		if len(onlineMap.IpTimeMap()) > 0 {
+			usersOnline = append(usersOnline, user)
+		}
+	}
+
+	return usersOnline
+}
+
 // Start implements common.Runnable.
 func (m *Manager) Start() error {
 	m.access.Lock()

features/stats/stats.go

@@ -98,6 +98,9 @@ type Manager interface {
 	UnregisterChannel(string) error
 	// GetChannel returns a channel by its identifier.
 	GetChannel(string) Channel
+
+	// GetAllOnlineUsers returns all online users from all OnlineMaps.
+	GetAllOnlineUsers() []string
 }
 
 // GetOrRegisterCounter tries to get the StatCounter first. If not exist, it then tries to create a new counter.
@@ -190,6 +193,11 @@ func (NoopManager) GetChannel(string) Channel {
 	return nil
 }
 
+// GetAllOnlineUsers implements Manager.
+func (NoopManager) GetAllOnlineUsers() []string {
+	return nil
+}
+
 // Start implements common.Runnable.
 func (NoopManager) Start() error { return nil }
 

main/commands/all/api/api.go

@@ -32,5 +32,6 @@ var CmdAPI = &base.Command{
 		cmdSourceIpBlock,
 		cmdOnlineStats,
 		cmdOnlineStatsIpList,
+		cmdGetAllOnlineUsers,
 	},
 }

main/commands/all/api/stats_get_all_online_users.go

@@ -0,0 +1,43 @@
+package api
+
+import (
+	statsService "github.com/xtls/xray-core/app/stats/command"
+	"github.com/xtls/xray-core/main/commands/base"
+)
+
+var cmdGetAllOnlineUsers = &base.Command{
+	CustomFlags: true,
+	UsageLine:   "{{.Exec}} api statsgetallonlineusers [--server=127.0.0.1:8080]",
+	Short:       "Retrieve array of all online users",
+	Long: `
+Retrieve array of all online users.
+
+Arguments:
+
+	-s, -server <server:port>
+		The API server address. Default 127.0.0.1:8080
+
+	-t, -timeout <seconds>
+		Timeout in seconds for calling API. Default 3
+
+Example:
+
+	{{.Exec}} {{.LongName}} --server=127.0.0.1:8080"
+`,
+	Run: executeGetAllOnlineUsers,
+}
+
+func executeGetAllOnlineUsers(cmd *base.Command, args []string) {
+	setSharedFlags(cmd)
+	cmd.Flag.Parse(args)
+	conn, ctx, close := dialAPIServer()
+	defer close()
+
+	client := statsService.NewStatsServiceClient(conn)
+	r := &statsService.GetAllOnlineUsersRequest{}
+	resp, err := client.GetAllOnlineUsers(ctx, r)
+	if err != nil {
+		base.Fatalf("failed to get stats: %s", err)
+	}
+	showJSONResponse(resp)
+}