89 lines
1.6 KiB
Go
89 lines
1.6 KiB
Go
package main
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import (
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"context"
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"flag"
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"fmt"
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"log"
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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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"syscall"
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)
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var Config struct {
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Port int
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SessionD string
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}
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func main() {
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ctx, can := signal.NotifyContext(context.Background(), syscall.SIGINT)
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defer can()
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ctx, cleanup := contextWithCleanup(ctx)
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defer cleanup()
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config(ctx)
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log.Printf("%+v", Config)
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listenAndServe(ctx)
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log.Println("done")
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}
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func contextWithCleanup(ctx context.Context) (context.Context, func()) {
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m := map[int]func(){}
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ctx = context.WithValue(ctx, "__cleanup__", m)
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return ctx, func() {
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defer func() {
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recover()
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}()
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for _, v := range m {
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v()
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}
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}
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}
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func contextWithCleanupFunc(ctx context.Context, foo func()) {
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v := ctx.Value("__cleanup__")
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if v == nil {
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panic("cannot get context with cleanup func that doesnt have cleanup init")
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}
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m := v.(map[int]func())
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m[len(m)] = foo
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}
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func config(ctx context.Context) {
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d, err := os.MkdirTemp(os.TempDir(), "ai.*")
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if err != nil {
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panic(err)
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}
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contextWithCleanupFunc(ctx, func() { os.RemoveAll(d) })
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flag.IntVar(&Config.Port, "p", 37070, "port to listen on")
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flag.StringVar(&Config.SessionD, "d", d, "dir to store sessions")
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flag.Parse()
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}
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func listenAndServe(ctx context.Context) {
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wg := &sync.WaitGroup{}
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s := &http.Server{
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Addr: fmt.Sprintf(":%d", Config.Port),
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Handler: http.HandlerFunc(handle),
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}
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wg.Add(1)
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go func() {
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defer wg.Done()
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if err := s.ListenAndServe(); err != nil && ctx.Err() == nil {
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panic(err)
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}
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}()
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<-ctx.Done()
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s.Close()
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wg.Wait()
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}
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func handle(w http.ResponseWriter, r *http.Request) {
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}
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