basic download functionality

go.mod

@@ -0,0 +1,3 @@
+module gitea.ewpt3ch.dev/ewpt3ch/pkgstash
+
+go 1.26.2

main.go

@@ -0,0 +1,43 @@
+package main
+
+import (
+	"log"
+	"net/http"
+	"os"
+	"path/filepath"
+)
+
+const repoRoot = "/home/ewpt3ch/dev/pacman-cache-server/tmprepo"
+
+func main() {
+	const port = "8090"
+
+	mux := http.NewServeMux()
+	mux.HandleFunc("GET /{repo}/os/{arch}/{file}", handlePackage)
+
+	httpServe := &http.Server{
+		Addr:    ":" + port,
+		Handler: mux,
+	}
+
+	log.Fatal(httpServe.ListenAndServe())
+
+}
+
+func handlePackage(w http.ResponseWriter, req *http.Request) {
+	repo := req.PathValue("repo")
+	arch := req.PathValue("arch")
+	file := req.PathValue("file")
+
+	filePath := filepath.Join(repoRoot, repo, "os", arch, file)
+	// is where we handle cache misses and fetch the file
+	// from a mirror, for now we send a 404
+	if _, err := os.Stat(filePath); err != nil {
+		w.Header().Set("Content-Type", "text/plain; charset=utf-8")
+		w.WriteHeader(404)
+		w.Write([]byte("No such file"))
+		return
+	}
+
+	http.ServeFile(w, req, filePath)
+}