чанки в БД (таблица chunks), убран _chunk_store в памяти, v1.17

site/app.py

@@ -17,9 +17,6 @@ from api import api_bp
 
 load_dotenv()
 
-# Хранилище чанков (в памяти, теряется при рестарте)
-_chunk_store = {}
-
 
 def _save_file_to_db(filename, file_bytes, mime, contract_id):
     """Сохранить один файл в БД: documents + supplements. Возвращает doc_id или None."""
@@ -104,63 +101,78 @@ class ContractsApp:
     # ── Чанковая загрузка ──────────────────────────────────────
 
     def _chunk_upload(self):
-        """Принять чанк файла. На последнем — собрать и сохранить."""
+        """Принять чанк. Хранить в БД. На последнем — собрать и сохранить."""
         upload_id = request.form.get("upload_id", "")
         filename = request.form.get("filename", "")
         chunk_index = int(request.form.get("chunk_index", 0))
         total_chunks = int(request.form.get("total_chunks", 1))
-        cid = request.form.get("cid")
+        cid = request.form.get("cid") or None
         chunk_file = request.files.get("chunk")
         if not chunk_file:
             return jsonify({"error": "Нет чанка"}), 400
 
         chunk_data = chunk_file.read()
+        mime = mimeutil.guess_mime(filename) or "application/octet-stream"
 
-        if upload_id not in _chunk_store:
-            _chunk_store[upload_id] = {
-                "filename": filename,
-                "mime": mimeutil.guess_mime(filename) or "application/octet-stream",
-                "chunks": [None] * total_chunks,
-                "total": total_chunks,
-                "cid": cid,
-                "received": 0,
-            }
+        # Сохранить чанк в БД (ON CONFLICT — идемпотентно)
+        db.execute(
+            "INSERT INTO chunks (upload_id, chunk_index, chunk_data, filename, mime, total_chunks, cid) "
+            "VALUES (%s,%s,%s,%s,%s,%s,%s) ON CONFLICT (upload_id, chunk_index) DO NOTHING",
+            (upload_id, chunk_index, chunk_data, filename, mime, total_chunks, cid),
+        )
 
-        store = _chunk_store[upload_id]
-        if store["chunks"][chunk_index] is None:
-            store["chunks"][chunk_index] = chunk_data
-            store["received"] += 1
+        # Сколько уже получено
+        count_res, _ = db.query(
+            "SELECT COUNT(*) FROM chunks WHERE upload_id=%s", (upload_id,)
+        )
+        received = count_res["rows"][0][0] if count_res else 0
 
-        if store["received"] == total_chunks:
-            # Собрать файл
-            file_bytes = b"".join(store["chunks"])
-            mime = store["mime"]
-            fname = store["filename"]
-            cid = store["cid"]
-
-            # Создать контракт если нет
-            if cid:
-                contract_id = cid
-            else:
-                conn, err = db.connect()
-                if err:
-                    del _chunk_store[upload_id]
-                    return jsonify({"error": f"БД: {err}"}), 500
-                cur = conn.cursor()
-                cur.execute(
-                    "INSERT INTO contracts (number, client) VALUES (%s, %s) RETURNING id",
-                    ("б/н " + __import__("datetime").datetime.now().strftime("%Y%m%d-%H%M"), ""),
+        if received == total_chunks:
+            try:
+                # Собрать все чанки по порядку
+                rows_res, _ = db.query(
+                    "SELECT chunk_data FROM chunks WHERE upload_id=%s ORDER BY chunk_index",
+                    (upload_id,),
                 )
-                contract_id = cur.fetchone()[0]
-                conn.commit()
-                cur.close()
-                conn.close()
+                file_bytes = b"".join(r[0] for r in rows_res["rows"])
+
+                # Получить метаданные из первой записи
+                meta, _ = db.query_one(
+                    "SELECT filename, mime, cid FROM chunks WHERE upload_id=%s LIMIT 1",
+                    (upload_id,),
+                )
+                fname = meta["filename"] if meta else filename
+                fmime = meta["mime"] if meta else mime
+                fcid = meta["cid"] if meta else cid
+
+                # Создать контракт если нет
+                if fcid:
+                    contract_id = fcid
+                else:
+                    conn, err = db.connect()
+                    if err:
+                        return jsonify({"error": f"БД: {err}"}), 500
+                    cur = conn.cursor()
+                    cur.execute(
+                        "INSERT INTO contracts (number, client) VALUES (%s, %s) RETURNING id",
+                        ("б/н " + __import__("datetime").datetime.now().strftime("%Y%m%d-%H%M"), ""),
+                    )
+                    contract_id = cur.fetchone()[0]
+                    conn.commit()
+                    cur.close()
+                    conn.close()
+
+                doc_id = _save_file_to_db(fname, file_bytes, fmime, str(contract_id))
+                if not doc_id:
+                    return jsonify({"error": "Не удалось сохранить файл в БД"}), 500
+            except Exception as e:
+                return jsonify({"error": f"Сборка: {e}"}), 500
+            finally:
+                db.execute("DELETE FROM chunks WHERE upload_id=%s", (upload_id,))
 
-            _save_file_to_db(fname, file_bytes, mime, str(contract_id))
-            del _chunk_store[upload_id]
             return jsonify({"contract_id": str(contract_id)})
 
-        return jsonify({"chunk": chunk_index, "received": store["received"], "total": total_chunks})
+        return jsonify({"chunk": chunk_index, "received": received, "total": total_chunks})
 
     def _show_contract(self, cid):
         """Показать договор с кнопкой «Обработать»."""