拆分文件，增加上传接口

api/useUploadApi.js

@@ -0,0 +1,34 @@
+import path from "path";
+import fs from "fs";
+import multer from "multer";
+import { api_upload, staticPath } from "../config.js";
+
+const storage = multer.memoryStorage();
+const upload = multer({ storage: storage }).single('file');
+
+export default function useUploadApi(app) {
+	app.post(api_upload, upload, (req, res) => {
+		const decodedPath = decodeURIComponent(req.path).substring(8);
+        const savePath = path.join(staticPath, decodedPath, req.file.originalname)
+        // 覆盖写or追加写
+        const oprateType = req.body.oprateType === 'write' ? 'write' : 'append'
+        const data = req.file.buffer
+        if (oprateType === 'write') {
+            // 覆盖写入
+            fs.writeFile(savePath, data, (err) => {
+                if (err) {
+                    return res.status(500).json({ message: 'failed', error: err });
+                }
+                res.status(200).json({ message: 'success' });
+            });
+        } else {
+            // 追加写入
+            fs.appendFile(savePath, data, (err) => {
+                if (err) {
+                    return res.status(500).json({ message: 'failed', error: err });
+                }
+                res.status(200).json({ message: 'success' });
+            });
+        }
+	});
+}