update

controller/fileController.js

@@ -86,6 +86,46 @@ async function downloadFileById(req, res, next) {
 }
 
 
+async function showFileById(req, res, next) {
+    try {
+        // ----------
+          let fileId = req.params.fileId;
+        let fileinfo = await DB.File.findOne({ where: {id: fileId}, raw: true });
+        if (!(fileinfo && fileinfo.id)) {
+            return res.sendError(errorMessage.resourceNotFound)
+        }
+        let {
+            originalname,
+            filename,
+            size,
+            mimetype,
+            url,
+            path,
+            nginxpath,
+        } = fileinfo;
+        //TODO:path处理
+        const filePath = Path.join(__dirname, '../../../', path);
+        
+        if (!fs.existsSync(filePath)) {
+            return res.sendError(errorMessage.resourceNotFound)
+        }
+        // 3. 设置强制下载响应头 
+        res.setHeader('Content-Type', mimetype);
+        res.setHeader('Content-Disposition', `inline; filename="${encodeURIComponent(filename)}"`);
+        // 4. 创建文件流并传输 
+        const fileStream = fs.createReadStream(filePath);
+        fileStream.pipe(res);
+        // 错误处理 
+        fileStream.on('error', (err) => {
+            console.error(`File  stream error: ${err}`);
+            if (!res.headersSent) res.status(500).send('File  streaming error');
+        });
+    } catch (error) {
+        next(error);
+    }
+}
+
+
 
 
 
@@ -98,4 +138,5 @@ module.exports = {
     upload,
     batchUpload,
     downloadFileById,
+    showFileById,
 }
\ No newline at end of file

middleware/request.js

@@ -63,6 +63,7 @@ function checkPath(path) {
         /^\/user\/login$/,
         /^\/user\/regist$/,
         /^\/file\/download\/\d+$/, 
+        /^\/file\/show\/\d+$/, 
     ];
     
     return allowedPatterns.some(pattern  => pattern.test(path)); 

router/fileRouter.js

@@ -36,5 +36,6 @@ router.post('/upload', upload.single('file'), fileController.upload);
 router.post('/batch/upload', upload.array('files'), fileController.batchUpload);
 
 router.get('/download/:fileId', fileController.downloadFileById);
+router.get('/show/:fileId', fileController.showFileById);
 
 module.exports = router;
\ No newline at end of file