first commit

handlers/upload.go

@@ -0,0 +1,58 @@
+package handlers
+
+import (
+	"context"
+	"encoding/json"
+	"io"
+	"net/http"
+	"path/filepath"
+
+	"aroll/store"
+)
+
+// UploadHandler reads the video into memory and stores it in Redis under a
+// random key. The key is returned to the frontend as "filename".
+// Nothing is written to disk — the file lives only in Redis with a TTL.
+func UploadHandler(st *store.Store) http.HandlerFunc {
+	return func(w http.ResponseWriter, r *http.Request) {
+		if r.Method != http.MethodPost {
+			http.Error(w, "method not allowed", http.StatusMethodNotAllowed)
+			return
+		}
+
+		r.Body = http.MaxBytesReader(w, r.Body, 4<<30)
+		if err := r.ParseMultipartForm(64 << 20); err != nil {
+			http.Error(w, "parse form: "+err.Error(), http.StatusBadRequest)
+			return
+		}
+
+		file, header, err := r.FormFile("video")
+		if err != nil {
+			http.Error(w, "missing 'video' field", http.StatusBadRequest)
+			return
+		}
+		defer file.Close()
+
+		data, err := io.ReadAll(file)
+		if err != nil {
+			http.Error(w, "read file: "+err.Error(), http.StatusInternalServerError)
+			return
+		}
+
+		ext := filepath.Ext(header.Filename)
+		if ext == "" {
+			ext = ".mp4"
+		}
+
+		// Key format: "video-<id><ext>"  e.g.  "video-a3f9...2b.mp4"
+		key := "video-" + store.NewID() + ext
+
+		if err := st.Set(context.Background(), key, data); err != nil {
+			http.Error(w, "store: "+err.Error(), http.StatusInternalServerError)
+			return
+		}
+
+		w.Header().Set("Content-Type", "application/json")
+		json.NewEncoder(w).Encode(map[string]string{"filename": key})
+	}
+}