first with full handle over rpm

Signed-off-by: GnomeZworc <nicolas.boufidjeline@g3e.fr>

internal/api/proxy_handler.go

@@ -0,0 +1,43 @@
+package api
+
+import (
+	"errors"
+	"fmt"
+	"net/http"
+	"strconv"
+
+	"github.com/go-chi/chi/v5"
+	"github.com/syonad/clonepack/internal/core"
+	"github.com/syonad/clonepack/internal/store"
+)
+
+type ProxyHandler struct {
+	repoSvc *core.RepoService
+	dataDir string
+}
+
+func NewProxyHandler(repoSvc *core.RepoService, dataDir string) *ProxyHandler {
+	return &ProxyHandler{repoSvc: repoSvc, dataDir: dataDir}
+}
+
+func (h *ProxyHandler) ServeFile(w http.ResponseWriter, r *http.Request) {
+	repoID, err := strconv.ParseInt(chi.URLParam(r, "repo_id"), 10, 64)
+	if err != nil {
+		http.Error(w, "invalid repo_id", http.StatusBadRequest)
+		return
+	}
+
+	repo, err := h.repoSvc.Get(r.Context(), repoID)
+	if errors.Is(err, store.ErrNotFound) {
+		http.NotFound(w, r)
+		return
+	}
+	if err != nil {
+		http.Error(w, err.Error(), http.StatusInternalServerError)
+		return
+	}
+
+	localDir := fmt.Sprintf("%s/repos/%d/%s", h.dataDir, repoID, repo.Type)
+	prefix := fmt.Sprintf("/mirror/%d", repoID)
+	http.StripPrefix(prefix, http.FileServer(http.Dir(localDir))).ServeHTTP(w, r)
+}