fix: 优化服务器错误提示，读取文件显示权限信息

Author: Flex-7746

backend/src/router/read.js

@@ -4,25 +4,44 @@ module.exports = async function read({ query }) {
   const { path } = query;
 
   if (!path) {
-    return { code: 400, msg: "缺少文件路径参数" };
+    return { code: 400, msg: "缺少文件路径参数", data: query };
   }
 
-  if (!fs.existsSync(path)) {
-    return { code: 404, msg: "文件不存在" };
-  }
+  try {
+    if (!fs.existsSync(path)) {
+      return { code: 404, msg: "文件不存在", data: query };
+    }
 
-  const stat = fs.statSync(path);
-  if (!stat.isFile()) {
-    return { code: 400, msg: "路径不是文件" };
-  }
+    const stat = fs.statSync(path);
+    if (!stat.isFile()) {
+      return { code: 400, msg: "路径不是文件", data: query };
+    }
+
+    const testFd = fs.openSync(path, "r");
+    fs.closeSync(testFd);
+
+    return {
+      code: 200,
+      msg: "操作成功",
+      data: {
+        size: stat.size,
+        filename: path.split("/").pop(),
+        stream: fs.createReadStream(path),
+      },
+    };
+  } catch (error) {
+    if (error.code === "EACCES" || error.code === "EPERM") {
+      return { code: 403, msg: "权限不足，无法读取文件", data: query };
+    }
 
-  return {
-    code: 200,
-    msg: "操作成功",
-    data: {
-      size: stat.size,
-      filename: path.split("/").pop(),
-      stream: fs.createReadStream(path),
-    },
-  };
+    if (error.code === "ENOENT") {
+      return { code: 404, msg: "文件不存在", data: query };
+    }
+
+    if (error.code === "EISDIR") {
+      return { code: 400, msg: "路径是目录而不是文件", data: query };
+    }
+
+    return { code: 500, msg: `读取文件失败: ${error.message}`, data: query };
+  }
 };

backend/src/router/save.js

@@ -5,28 +5,29 @@ module.exports = async function read({ body }) {
   const { path, encode, value } = body;
 
   if (!path) {
-    return { code: 400, msg: "缺少文件路径参数" };
+    return { code: 400, msg: "缺少文件路径参数", data: body };
   }
 
-  if (!fs.existsSync(path)) {
-    return { code: 404, msg: "文件不存在" };
-  }
+  try {
+    if (!fs.existsSync(path)) {
+      return { code: 404, msg: "文件不存在", data: body };
+    }
 
-  const stat = fs.statSync(path);
-  if (!stat.isFile()) {
-    return { code: 400, msg: "路径不是文件" };
-  }
+    const stat = fs.statSync(path);
+    if (!stat.isFile()) {
+      return { code: 400, msg: "路径不是文件", data: body };
+    }
 
-  try {
     fs.writeFileSync(path, iconv.encode(value, encode));
+
     return { code: 200, msg: "操作成功", data: null };
   } catch (err) {
     if (err.code === "EACCES") {
-      return { code: 401, msg: "权限不足，无法写入文件" };
+      return { code: 401, msg: "权限不足，无法写入文件", data: body };
     } else if (err.code === "ENOENT") {
-      return { code: 400, msg: "目录不存在，无法写入文件" };
+      return { code: 400, msg: "目录不存在，无法写入文件", data: body };
     } else {
-      return { code: 400, msg: "文件操作错误" };
+      return { code: 400, msg: "文件操作错误", data: body };
     }
   }
 };