274 lines
7.4 KiB
Go
274 lines
7.4 KiB
Go
package main
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import (
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"context"
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"errors"
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"fmt"
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"io"
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"net"
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"net/http"
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"os"
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"os/exec"
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"os/signal"
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"path/filepath"
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"runtime/debug"
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"syscall"
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"time"
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)
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var version = "dev"
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func main() {
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os.Exit(realMain())
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}
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func realMain() (exitCode int) {
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defer func() {
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if recovered := recover(); recovered != nil {
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fmt.Fprintf(os.Stderr, "readcard-go panic: %v\n%s\n", recovered, debug.Stack())
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exitCode = 2
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}
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}()
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if hasArg("--gui") {
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return runGUIProcess()
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}
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if isWorker() {
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return runWorker()
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}
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return runSupervisor()
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}
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func hasArg(want string) bool {
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for _, arg := range os.Args[1:] {
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if arg == want {
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return true
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}
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}
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return false
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}
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func isWorker() bool {
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if os.Getenv("CARD_NO_SUPERVISOR") == "1" {
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return true
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}
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return hasArg("--worker")
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}
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func runWorker() int {
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cfg, err := loadConfig()
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if err != nil {
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logBootstrapFailure("worker_config_failure", err)
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fmt.Fprintln(os.Stderr, err)
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return 1
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}
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logger, err := newAppLogger(cfg, "worker")
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if err != nil {
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fmt.Fprintf(os.Stderr, "初始化日志失败: %v\n", err)
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return 1
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}
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defer logger.Close()
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defer func() {
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if recovered := recover(); recovered != nil {
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logger.Error("工作进程 panic", "event", "worker_panic", "panic", fmt.Sprint(recovered), "stack", string(debug.Stack()))
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panic(recovered)
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}
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}()
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reader := newDLLReader(cfg)
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status := reader.Status()
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if status.Loaded {
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logger.Info("读卡 DLL 初始化成功", "event", "dll_loaded", "dll_dir", status.DLLDir)
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} else {
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logger.Error("读卡 DLL 初始化失败", "event", "dll_load_failure", "dll_dir", status.DLLDir, "error", status.Error)
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}
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address := net.JoinHostPort(cfg.Host, fmt.Sprint(cfg.Port))
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listener, err := net.Listen("tcp", address)
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if err != nil {
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logger.Error("HTTP 服务监听失败", "event", "listen_failure", "address", address, "error", err)
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return 1
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}
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server := &http.Server{
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Handler: newHandler(cfg, reader, logger),
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ReadHeaderTimeout: 10 * time.Second,
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ReadTimeout: 30 * time.Second,
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WriteTimeout: 5 * time.Minute,
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IdleTimeout: 120 * time.Second,
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MaxHeaderBytes: 1 << 20,
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}
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logger.Info("读卡服务已启动", "event", "service_started", "version", version, "url", "http://"+address, "dll_dir", status.DLLDir, "arch", status.Arch)
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serveErr := make(chan error, 1)
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go func() { serveErr <- server.Serve(listener) }()
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signals := make(chan os.Signal, 1)
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signal.Notify(signals, os.Interrupt, syscall.SIGTERM)
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defer signal.Stop(signals)
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select {
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case sig := <-signals:
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logger.Info("收到停止信号", "event", "shutdown_signal", "signal", sig.String())
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ctx, cancel := context.WithTimeout(context.Background(), 10*time.Second)
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defer cancel()
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if err = server.Shutdown(ctx); err != nil {
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logger.Error("HTTP 服务优雅停止失败", "event", "shutdown_failure", "error", err)
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return 1
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}
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logger.Info("读卡服务已停止", "event", "service_stopped")
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return 0
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case err = <-serveErr:
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if errors.Is(err, http.ErrServerClosed) {
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return 0
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}
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logger.Error("HTTP 服务异常退出", "event", "server_failure", "error", err)
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return 1
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}
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}
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func runSupervisor() int {
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cfg, err := loadConfig()
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if err != nil {
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logBootstrapFailure("supervisor_config_failure", err)
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fmt.Fprintln(os.Stderr, err)
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return 1
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}
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logger, err := newAppLogger(cfg, "supervisor")
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if err != nil {
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fmt.Fprintf(os.Stderr, "初始化日志失败: %v\n", err)
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return 1
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}
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defer logger.Close()
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exe, err := os.Executable()
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if err != nil {
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logger.Error("获取程序路径失败", "event", "supervisor_failure", "error", err)
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return 1
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}
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signals := make(chan os.Signal, 1)
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signal.Notify(signals, os.Interrupt, syscall.SIGTERM)
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defer signal.Stop(signals)
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rapidRestarts := 0
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for {
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started := time.Now()
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cmd := exec.Command(exe, "--worker")
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cmd.Dir = cfg.AppRoot
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cmd.Env = append(os.Environ(), "CARD_APP_ROOT="+cfg.AppRoot)
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cmd.Stdout = os.Stdout
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crashWriter, crashErr := newDailyWriter(
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cfg.LogDir,
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"crash",
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cfg.LogRetentionDays,
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int64(cfg.LogMaxFileMB)*1024*1024,
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int64(cfg.LogMaxTotalMB)*1024*1024,
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)
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if crashErr != nil {
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logger.Error("打开崩溃日志失败", "event", "crash_log_failure", "error", crashErr)
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cmd.Stderr = os.Stderr
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} else {
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cmd.Stderr = io.MultiWriter(os.Stderr, crashWriter)
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}
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if err = cmd.Start(); err != nil {
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if crashWriter != nil {
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_ = crashWriter.Close()
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}
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logger.Error("启动工作进程失败", "event", "worker_start_failure", "error", err)
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return 1
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}
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logger.Info("工作进程已启动", "event", "worker_started", "worker_pid", cmd.Process.Pid)
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waitDone := make(chan error, 1)
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go func() { waitDone <- cmd.Wait() }()
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gui := exec.Command(exe, "--gui")
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gui.Dir = cfg.AppRoot
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gui.Env = append(os.Environ(), "CARD_APP_ROOT="+cfg.AppRoot)
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if err = gui.Start(); err != nil {
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logger.Error("启动 GUI 失败", "event", "gui_start_failure", "error", err)
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_ = cmd.Process.Kill()
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<-waitDone
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if crashWriter != nil {
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_ = crashWriter.Close()
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}
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return 1
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}
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logger.Info("GUI 已启动", "event", "gui_started", "gui_pid", gui.Process.Pid)
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guiDone := make(chan error, 1)
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go func() { guiDone <- gui.Wait() }()
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select {
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case sig := <-signals:
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logger.Info("守护进程收到停止信号", "event", "supervisor_shutdown", "signal", sig.String(), "worker_pid", cmd.Process.Pid)
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_ = cmd.Process.Signal(os.Interrupt)
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select {
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case <-waitDone:
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case <-time.After(10 * time.Second):
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logger.Error("工作进程停止超时，强制结束", "event", "worker_kill", "worker_pid", cmd.Process.Pid)
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_ = cmd.Process.Kill()
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<-waitDone
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}
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if crashWriter != nil {
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_ = crashWriter.Close()
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}
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_ = gui.Process.Kill()
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<-guiDone
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return 0
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case guiErr := <-guiDone:
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logger.Info("GUI 已关闭", "event", "gui_stopped", "error", guiErr)
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_ = cmd.Process.Signal(os.Interrupt)
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select {
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case <-waitDone:
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case <-time.After(10 * time.Second):
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_ = cmd.Process.Kill()
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<-waitDone
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}
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if crashWriter != nil {
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_ = crashWriter.Close()
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}
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return 0
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case waitErr := <-waitDone:
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_ = gui.Process.Kill()
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<-guiDone
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if crashWriter != nil {
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_ = crashWriter.Close()
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}
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runFor := time.Since(started)
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exitCode := 0
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if cmd.ProcessState != nil {
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exitCode = cmd.ProcessState.ExitCode()
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}
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logger.Error("工作进程异常退出", "event", "worker_crash", "worker_pid", cmd.Process.Pid, "exit_code", exitCode, "runtime_ms", runFor.Milliseconds(), "error", waitErr)
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if runFor < 30*time.Second {
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rapidRestarts++
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} else {
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rapidRestarts = 0
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}
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if rapidRestarts >= cfg.MaxRapidRestarts {
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logger.Error("工作进程短时间内连续崩溃，停止自动重启", "event", "restart_limit", "rapid_restarts", rapidRestarts)
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return 1
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}
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logger.Warn("即将自动重启工作进程", "event", "worker_restart", "delay_ms", cfg.RestartDelayMS, "rapid_restarts", rapidRestarts)
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select {
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case sig := <-signals:
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logger.Info("重启等待期间收到停止信号", "event", "supervisor_shutdown", "signal", sig.String())
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return 0
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case <-time.After(time.Duration(cfg.RestartDelayMS) * time.Millisecond):
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}
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}
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}
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}
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func logBootstrapFailure(event string, failure error) {
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root, err := resolveAppRoot()
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if err != nil {
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return
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}
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cfg := defaultConfig(root)
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cfg.LogDir = filepath.Join(root, cfg.LogDir)
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logger, err := newAppLogger(cfg, "bootstrap")
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if err != nil {
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return
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}
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logger.Error("程序启动失败", "event", event, "error", failure)
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_ = logger.Close()
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}
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