完成Web ASM

cmd/server/main.go

@@ -0,0 +1,56 @@
+package main
+
+import (
+	"embed"
+	"flag"
+	"fmt"
+	"io/fs"
+	"log"
+	"net/http"
+	"os"
+	"os/signal"
+	"strings"
+	"syscall"
+)
+
+//go:embed all:static/dist
+var staticFiles embed.FS
+
+func main() {
+	port := flag.Int("port", 8080, "server port")
+	flag.Parse()
+
+	distFS, err := fs.Sub(staticFiles, "static/dist")
+	if err != nil {
+		log.Fatalf("failed to open embedded files: %v", err)
+	}
+
+	mux := http.NewServeMux()
+
+	stripped, err := fs.Sub(distFS, ".")
+	if err != nil {
+		log.Fatalf("failed to sub: %v", err)
+	}
+	fileServer := http.FileServer(http.FS(stripped))
+
+	mux.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
+		if strings.HasSuffix(r.URL.Path, ".wasm") {
+			w.Header().Set("Content-Type", "application/wasm")
+		}
+		fileServer.ServeHTTP(w, r)
+	})
+
+	go func() {
+		quit := make(chan os.Signal, 1)
+		signal.Notify(quit, syscall.SIGINT, syscall.SIGTERM)
+		<-quit
+		log.Println("shutting down...")
+		os.Exit(0)
+	}()
+
+	log.Printf("ncmdump-web (WASM mode) starting on :%d", *port)
+	addr := fmt.Sprintf(":%d", *port)
+	if err := http.ListenAndServe(addr, mux); err != nil {
+		log.Fatalf("server error: %v", err)
+	}
+}