372d9f07dd
This commit imports the repository https://github.com/mvo5/oaas without keeping the history. The history is largely unimportant and can be looked up in https://github.com/mvo5/oaas/commits/main if needed.
83 lines
1.8 KiB
Go
83 lines
1.8 KiB
Go
package main
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import (
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"context"
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"fmt"
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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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"sync"
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"time"
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"github.com/sirupsen/logrus"
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)
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// based on the excellent post
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// https://grafana.com/blog/2024/02/09/how-i-write-http-services-in-go-after-13-years/
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var logrusNew = logrus.New
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func newServer(logger *logrus.Logger, config *Config) http.Handler {
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mux := http.NewServeMux()
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addRoutes(mux, logger, config)
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var handler http.Handler = mux
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// todo: consider centralize logginer here?
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//handler = loggingMiddleware(handler)
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return handler
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}
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func run(ctx context.Context, args []string, getenv func(string) string) error {
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ctx, cancel := signal.NotifyContext(ctx, os.Interrupt)
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defer cancel()
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logger := logrusNew()
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config, err := newConfigFromCmdline(args)
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if err != nil {
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return err
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}
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srv := newServer(logger, config)
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httpServer := &http.Server{
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Addr: net.JoinHostPort(config.Host, config.Port),
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Handler: srv,
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}
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go func() {
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logger.Printf("listening on %s\n", httpServer.Addr)
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if err := httpServer.ListenAndServe(); err != nil && err != http.ErrServerClosed {
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fmt.Fprintf(os.Stderr, "error listening and serving: %s\n", err)
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}
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}()
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// todo: this seems kinda complicated, why a waitgroup and not
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// do it flat?
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var wg sync.WaitGroup
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wg.Add(1)
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go func() {
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defer wg.Done()
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<-ctx.Done()
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shutdownCtx := context.Background()
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shutdownCtx, cancel := context.WithTimeout(ctx, 10*time.Second)
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defer cancel()
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if err := httpServer.Shutdown(shutdownCtx); err != nil {
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fmt.Fprintf(os.Stderr, "error shutting down http server: %s\n", err)
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}
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}()
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wg.Wait()
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// cleanup
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if err := os.RemoveAll(config.BuildDirBase); err != nil {
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logger.Errorf("cannot cleanup: %v", err)
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return err
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}
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return nil
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}
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func main() {
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ctx := context.Background()
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if err := run(ctx, os.Args, os.Getenv); err != nil {
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fmt.Fprintf(os.Stderr, "%s\n", err)
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os.Exit(1)
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}
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}
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