108 lines
2.4 KiB
Go
108 lines
2.4 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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"log"
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"net"
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"net/http"
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"os"
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"os/signal"
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"strings"
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"syscall"
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"time"
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"git.nianxx.cn/wangxuming/NianAIGC/backend/internal/application"
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"git.nianxx.cn/wangxuming/NianAIGC/backend/internal/settings"
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)
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const shutdownTimeout = 10 * time.Second
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func main() {
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if err := run(); err != nil {
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log.Fatal(err)
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}
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}
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func run() error {
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ctx, stop := signal.NotifyContext(context.Background(), os.Interrupt, syscall.SIGTERM)
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defer stop()
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getenv, err := runtimeGetenv(os.Getenv)
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if err != nil {
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return fmt.Errorf("load Go backend runtime settings: %w", err)
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}
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app, err := application.New(application.Options{Context: ctx, Getenv: getenv})
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if err != nil {
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return fmt.Errorf("initialize Go backend: %w", err)
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}
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defer app.Close()
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server := &http.Server{
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Addr: listenAddress(getenv),
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Handler: app.Handler(),
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ReadHeaderTimeout: 5 * time.Second,
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}
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serveErr := make(chan error, 1)
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go func() {
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log.Printf("zhinian-api foundation listening on %s", server.Addr)
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serveErr <- server.ListenAndServe()
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}()
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select {
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case err := <-serveErr:
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if errors.Is(err, http.ErrServerClosed) {
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return nil
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}
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return fmt.Errorf("serve Go backend: %w", err)
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case <-ctx.Done():
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}
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shutdownCtx, cancel := context.WithTimeout(context.Background(), shutdownTimeout)
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defer cancel()
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if err := server.Shutdown(shutdownCtx); err != nil {
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return fmt.Errorf("shut down Go backend: %w", err)
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}
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if err := <-serveErr; err != nil && !errors.Is(err, http.ErrServerClosed) {
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return fmt.Errorf("serve Go backend: %w", err)
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}
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return nil
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}
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func runtimeGetenv(process func(string) string) (func(string) string, error) {
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path := strings.TrimSpace(process("ZHINIAN_SETTINGS_FILE"))
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if path == "" {
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path = ".env.local"
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}
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values := map[string]string{}
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for _, key := range settings.RuntimeSettingKeys() {
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if value := process(key); value != "" {
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values[key] = value
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}
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}
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merged, err := settings.LoadEnvironment(path, values)
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if err != nil {
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return nil, err
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}
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return func(name string) string {
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if value, exists := merged[name]; exists {
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return value
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}
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return process(name)
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}, nil
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}
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func listenAddress(getenv func(string) string) string {
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host := strings.TrimSpace(getenv("GO_BACKEND_HOST"))
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if host == "" {
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host = "127.0.0.1"
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}
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port := strings.TrimSpace(getenv("GO_BACKEND_PORT"))
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if port == "" {
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port = "8080"
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}
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return net.JoinHostPort(host, port)
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}
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