feat: 添加 GitHub 存储支持，更新相关文档和配置

.env.example

@@ -1,10 +1,10 @@
 # 存储类型选择
 ## Done
 # r2 | Cloudflare R2
+# github | GitHub Repository
 ## TODO LIST:
 # cnbcool | Tencent cnb.cool
 # s3 | Amazon S3
-# github-repo | GitHub Repo
 STORAGE_TYPE=r2
 
 # ==================== Cloudflare R2 配置 ====================
@@ -27,6 +27,24 @@ R2_PUBLIC_URL=https://pub-<bucket-name>.r2.dev
 # R2 预签名 URL 过期时间（秒，默认: 3600）
 R2_PRESIGN_EXPIRES=3600
 
+# ==================== GitHub 存储配置 ====================
+# GitHub 仓库所有者
+GITHUB_REPO_OWNER=your-username
+
+# GitHub 仓库名称
+GITHUB_REPO_NAME=your-repo
+
+# GitHub 访问令牌 (需要 repo 权限)
+GITHUB_ACCESS_TOKEN=your-access-token
+
+# GitHub 分支名称 (默认: main)
+GITHUB_BRANCH=main
+
+# GitHub Raw 文件反向代理 URL (可选，用于加速访问)
+# 例如: https://raw.fastgit.org 或 https://ghproxy.com/https://raw.githubusercontent.com
+# 留空则使用官方 raw.githubusercontent.com
+GITHUB_RAW_PROXY_URL=
+
 # ==================== 应用配置 ====================
 # 缩略图缓存时间（秒，默认: 3600）
 THUMB_TTL_SECONDS=3600

README.md

@@ -19,7 +19,7 @@
 
 ## TODO
 
-- [ ] Github Repo 储存支持
+- [x] Github Repo 储存支持
 - [ ] Github Release 储存支持
 - [ ] 基于数据库的用户/权限管理
 - [ ] 操作日志记录
@@ -31,7 +31,8 @@
 
 - **Cloudflare R2** - Cloudflare 的对象存储服务（S3 兼容）
 - **Amazon S3** - Amazon S3 对象存储服务
-<!-- - **Github Repo** - 基于 GitHub Repository 的存储服务 -->
+- **GitHub Repository** - 基于 GitHub Repository 的存储服务
+<!-- - **Github Release** - 基于 GitHub Release 的存储服务 -->
 
 ## 快速开始
 
@@ -97,9 +98,36 @@ R2_PUBLIC_URL=https://pub-your-bucket.r2.dev
 R2_PRESIGN_EXPIRES=3600
 ```
 
+### GitHub Repository 配置
+
+```env
+STORAGE_TYPE=github
+
+# GitHub 仓库所有者（用户名或组织）
+GITHUB_REPO_OWNER=your-username
+
+# GitHub 仓库名称
+GITHUB_REPO_NAME=your-repo
+
+# GitHub 个人访问令牌（需要 repo 权限）
+# 获取方式：https://github.com/settings/tokens
+GITHUB_ACCESS_TOKEN=ghp_your_token_here
+
+# GitHub 分支名称（可选，默认: main）
+GITHUB_BRANCH=main
+
+# GitHub Raw 文件反向代理 URL（可选，用于加速访问）
+# 常用反向代理：
+# - https://raw.fastgit.org （推荐，速度快）
+# - https://ghproxy.com/https://raw.githubusercontent.com （需要拼接路径）
+# - https://raw.kgithub.com
+# 留空则使用官方 raw.githubusercontent.com（国内可能较慢）
+GITHUB_RAW_PROXY_URL=https://raw.fastgit.org
+```
+
 ## 项目结构
 
-```
+```bash
 r2-index/
 ├── app.py                 # Flask 应用主入口
 ├── handlers/

docs/api.md

@@ -604,13 +604,46 @@ async function uploadMultipleFiles(files) {
 - 总文件大小: 最多 10GB
 - API 请求频率: 根据您的 R2 套餐
 
-<!-- ### Github
+### GitHub Repository
 
 - 单文件大小: 最大 100MB（建议 < 50MB）
 - API 请求频率:
   - 有 Token: 5000 请求/小时
   - 无 Token: 60 请求/小时
-- Repository 总大小: 建议 < 1GB -->
+- Repository 总大小: 建议 < 1GB
+- 提交数量: 无限制
+
+## 存储配置
+
+### Cloudflare R2 配置
+
+```env
+STORAGE_TYPE=r2
+ACCESS_KEY_ID=your-access-key
+SECRET_ACCESS_KEY=your-secret-key
+R2_BUCKET_NAME=your-bucket
+R2_ENDPOINT_URL=https://your-endpoint.r2.cloudflarestorage.com
+R2_REGION=auto
+R2_PUBLIC_URL=https://pub-your-bucket.r2.dev
+R2_PRESIGN_EXPIRES=3600
+```
+
+### GitHub Repository 配置
+
+```env
+STORAGE_TYPE=github
+GITHUB_REPO_OWNER=your-username
+GITHUB_REPO_NAME=your-repo
+GITHUB_ACCESS_TOKEN=your-personal-access-token
+GITHUB_BRANCH=main
+```
+
+**获取 GitHub Access Token:**
+
+1. 访问 [GitHub Settings - Personal Access Tokens](https://github.com/settings/tokens)
+2. 点击 "Generate new token" (Classic)
+3. 选择 "repo" 权限范围
+4. 生成并复制 Token
 
 ## 安全建议
 
@@ -624,3 +657,5 @@ async function uploadMultipleFiles(files) {
 8. **访问控制**: 根据用户身份实施细粒度的访问控制
 9. **加密**: 对敏感数据进行加密存储和传输
 10. **备份**: 定期备份存储中的重要数据
+11. **Token 安全**: 不要将 Access Token 提交到版本控制系统，使用 `.env` 文件管理
+12. **定期轮换**: 定期轮换 Access Token 和密钥

handlers/routes.py

@@ -171,40 +171,97 @@ def browse(prefix_path):
 
 @main_route.route("/file/<path:file_path>")
 def serve_file(file_path):
-    """通过服务器提供文件访问"""
+    """重定向到原始存储 URL，节省服务器资源"""
     try:
-        # 获取文件的基本信息，验证文件存在并检查大小
+        # 验证文件存在
         try:
-            info = storage.get_object_info(file_path)
+            storage.get_object_info(file_path)
         except Exception:
             abort(404)
 
-        size = int(info.get("ContentLength", 0) or 0)
-        limit = 6 * 1024 * 1024  # 6 MB
+        # 尝试获取预签名 URL（用于私有存储或需要时间限制的 URL）
+        presigned = storage.generate_presigned_url(file_path)
+        if presigned:
+            return redirect(presigned)
 
-        # 如果文件较大，避免通过 Serverless 函数传输，返回预签名 URL 的重定向
-        if size > limit:
-            presigned = storage.generate_presigned_url(file_path)
-            if presigned:
-                return redirect(presigned)
-            # 如果没有预签名 URL，则返回 413（Payload Too Large）
-            abort(413)
+        # 如果没有预签名 URL，尝试获取公共 URL
+        public_url = storage.get_public_url(file_path)
+        if public_url:
+            return redirect(public_url)
 
-        # 小文件：直接从存储获取并通过 Response 返回（流式）
-        file_obj = storage.get_object(file_path)
-        headers = {
-            "Content-Type": file_obj.get("ContentType", "application/octet-stream"),
-            "Content-Length": str(file_obj.get("ContentLength", 0)),
-        }
-
-        return Response(
-            file_obj["Body"].iter_chunks(), headers=headers, direct_passthrough=True
-        )
+        # 如果都没有可用的 URL，返回错误
+        abort(403)
 
     except Exception:
         abort(500)
 
 
+@main_route.route("/download/<path:file_path>")
+def download_file(file_path):
+    """为 GitHub 存储提供下载支持，添加 Content-Disposition 头以强制下载"""
+    try:
+        # 验证文件存在
+        try:
+            storage.get_object_info(file_path)
+        except Exception:
+            abort(404)
+
+        # 获取存储类型
+        storage_type = type(storage).__name__
+
+        # GitHub 存储：通过服务器中继以添加 Content-Disposition 头
+        if storage_type == "GitHubStorage":
+            try:
+                file_obj = storage.get_object(file_path)
+                file_name = file_path.split("/")[-1] if "/" in file_path else file_path
+
+                # 获取完整内容用于返回
+                body = file_obj.get("Body")
+                if hasattr(body, "read"):
+                    content = body.read()
+                elif hasattr(body, "data"):
+                    content = body.data
+                else:
+                    content = body
+
+                # 使用 RFC 5987 编码处理文件名中的特殊字符
+                from urllib.parse import quote
+
+                encoded_filename = quote(file_name.encode("utf-8"), safe="")
+
+                headers = {
+                    "Content-Type": file_obj.get(
+                        "ContentType", "application/octet-stream"
+                    ),
+                    "Content-Disposition": f"attachment; filename=\"{file_name}\"; filename*=UTF-8''{encoded_filename}",
+                    "Cache-Control": "public, max-age=86400",
+                }
+
+                return Response(
+                    content,
+                    headers=headers,
+                    mimetype=file_obj.get("ContentType", "application/octet-stream"),
+                )
+            except Exception as e:
+                print(f"GitHub download error: {e}")
+                abort(404)
+
+        # R2 和其他存储：直接重定向
+        presigned = storage.generate_presigned_url(file_path)
+        if presigned:
+            return redirect(presigned)
+
+        public_url = storage.get_public_url(file_path)
+        if public_url:
+            return redirect(public_url)
+
+        abort(403)
+
+    except Exception as e:
+        print(f"Download error: {e}")
+        abort(500)
+
+
 @main_route.route("/thumb/<path:file_path>")
 def thumb(file_path):
     """返回图片的缩略图，使用 Vercel Cache Headers 避免重复从 R2 拉取"""

static/css/main.css

@@ -9,6 +9,7 @@
     --folder-color: #ffc107;
     --file-color: #6c757d;
     --shadow-color: rgba(0, 0, 0, 0.1);
+    --icon-bg: #f0f0f0;
 }
 
 [data-theme="dark"] {
@@ -22,6 +23,7 @@
     --folder-color: #ffd54f;
     --file-color: #b0b0b0;
     --shadow-color: rgba(0, 0, 0, 0.3);
+    --icon-bg: #3a3a3a;
 }
 
 body {
@@ -149,7 +151,38 @@ h1 {
     object-fit: cover;
     border-radius: 6px;
     margin-bottom: 8px;
-    background-color: #f0f0f0;
+    background-color: var(--icon-bg);
+    cursor: pointer;
+    transition: transform 0.2s ease, box-shadow 0.2s ease;
+}
+
+.grid-thumb:hover {
+    transform: scale(1.02);
+    box-shadow: 0 2px 8px var(--shadow-color);
+}
+
+/* 网格卡片中的图标容器 */
+.grid-icon {
+    width: 100%;
+    height: 100px;
+    display: flex;
+    align-items: center;
+    justify-content: center;
+    margin-bottom: 8px;
+    border-radius: 6px;
+    background-color: var(--icon-bg);
+    cursor: pointer;
+    transition: transform 0.2s ease, background-color 0.2s ease, box-shadow 0.2s ease;
+}
+
+.grid-icon:hover {
+    transform: scale(1.02);
+    background-color: var(--hover-bg);
+    box-shadow: 0 2px 8px var(--shadow-color);
+}
+
+.grid-icon i {
+    font-size: 64px;
 }
 
 .grid-name {

static/js/main.js

@@ -295,20 +295,35 @@
         }
     }
 
-    function registerServiceWorker() {
+    function unregisterServiceWorker() {
         if (!("serviceWorker" in navigator)) {
             return;
         }
 
         window.addEventListener("load", () => {
             navigator.serviceWorker
-                .register("/static/sw.js")
-                .then((registration) => {
-                    console.log("SW registered:", registration);
+                .getRegistrations()
+                .then((registrations) => {
+                    registrations.forEach((registration) => {
+                        registration.unregister().then(() => {
+                            console.log("Service Worker unregistered");
+                        });
+                    });
                 })
                 .catch((error) => {
-                    console.log("SW registration failed:", error);
+                    console.log("Error unregistering Service Worker:", error);
                 });
+
+            // 清理 Service Worker 相关的缓存
+            if ("caches" in window) {
+                caches.keys().then((cacheNames) => {
+                    cacheNames.forEach((cacheName) => {
+                        caches.delete(cacheName).then(() => {
+                            console.log("Cache deleted:", cacheName);
+                        });
+                    });
+                });
+            }
         });
     }
 
@@ -527,24 +542,67 @@
         updateSelectAllState();
     }
 
+    function attachDownloadButtonListeners() {
+        const downloadButtons = document.querySelectorAll("[data-download-key]");
+        downloadButtons.forEach((button) => {
+            if (!button.dataset.listenerAttached) {
+                button.addEventListener("click", () => {
+                    const key = button.dataset.downloadKey;
+                    const name = button.dataset.downloadName;
+                    downloadFile(`/download/${key}`, name);
+                });
+                button.dataset.listenerAttached = "true";
+            }
+        });
+    }
+
     function downloadFile(url, filename) {
         if (!url) {
             updateStatus("✗ 无法下载：缺少下载链接", "error");
             return;
         }
 
-        const link = document.createElement("a");
-        link.href = url;
-        link.download = filename || "";
-        link.target = "_blank";
-        link.rel = "noopener";
+        // 对于 /download/ 路径，使用 fetch 以更好地处理大文件和错误
+        if (url.startsWith("/download/")) {
+            fetch(url)
+                .then((response) => {
+                    if (!response.ok) {
+                        throw new Error(`HTTP error! status: ${response.status}`);
+                    }
+                    return response.blob();
+                })
+                .then((blob) => {
+                    const link = document.createElement("a");
+                    const blobUrl = URL.createObjectURL(blob);
+                    link.href = blobUrl;
+                    link.download = filename || "file";
+                    document.body.appendChild(link);
+                    link.click();
+                    document.body.removeChild(link);
+                    URL.revokeObjectURL(blobUrl);
 
-        document.body.appendChild(link);
-        link.click();
-        document.body.removeChild(link);
+                    const statusDiv = updateStatus(`✓ 开始下载: ${filename || ""}`, "success");
+                    hideStatusLater(statusDiv);
+                })
+                .catch((error) => {
+                    console.error("Download error:", error);
+                    updateStatus(`✗ 下载失败: ${error.message}`, "error");
+                });
+        } else {
+            // 对于外部 URL，使用传统方法
+            const link = document.createElement("a");
+            link.href = url;
+            link.download = filename || "";
+            link.target = "_blank";
+            link.rel = "noopener";
 
-        const statusDiv = updateStatus(`✓ 开始下载: ${filename || ""}`, "success");
-        hideStatusLater(statusDiv);
+            document.body.appendChild(link);
+            link.click();
+            document.body.removeChild(link);
+
+            const statusDiv = updateStatus(`✓ 开始下载: ${filename || ""}`, "success");
+            hideStatusLater(statusDiv);
+        }
     }
 
     async function deleteSelectedEntries() {
@@ -885,8 +943,9 @@
         initDialog();
         initThemeAndView();
         registerModalHandlers();
-        registerServiceWorker();
+        unregisterServiceWorker();
         attachEntryCheckboxListeners();
+        attachDownloadButtonListeners();
     });
 
     window.uploadFiles = uploadFiles;

storages/__init__.py

@@ -1,6 +1,6 @@
 from .base import BaseStorage
-from .cnbcool import CnbCoolStorage
 from .factory import StorageFactory
+from .github import GitHubStorage
 from .r2 import R2Storage
 
 __all__ = ["BaseStorage", "R2Storage", "CnbCoolStorage", "StorageFactory"]

storages/factory.py

@@ -6,6 +6,7 @@ import dotenv
 from .base import BaseStorage
 
 # from .cnbcool import CnbCoolStorage
+from .github import GitHubStorage
 from .r2 import R2Storage
 
 dotenv.load_dotenv()
@@ -36,14 +37,14 @@ class StorageFactory:
 
         if storage_type == "r2":
             cls._instance = R2Storage()
-        # elif storage_type == "github":
-        #     cls._instance = GithubStorage()
+        elif storage_type == "github":
+            cls._instance = GitHubStorage()
         # elif storage_type == "cnbcool":
         #     cls._instance = CnbCoolStorage()
         else:
             raise RuntimeError(
                 f"Unsupported storage type: {storage_type}. "
-                f"Supported types: r2, cnbcool"
+                f"Supported types: r2, github, cnbcool"
             )
 
         return cls._instance

storages/github.py

@@ -0,0 +1,500 @@
+import base64
+import os
+from datetime import datetime
+from io import BytesIO
+from typing import Any, Dict
+
+import dotenv
+import requests
+from PIL import Image
+
+from .base import BaseStorage
+
+dotenv.load_dotenv()
+
+
+class StreamWrapper:
+    """为 BytesIO 包装器，使其支持 iter_chunks() 方法以兼容 R2 的流式响应"""
+
+    def __init__(self, data: bytes, chunk_size: int = 8192):
+        self.data = data
+        self.chunk_size = chunk_size
+        self.position = 0
+
+    def iter_chunks(self, chunk_size: int = None):
+        """迭代返回数据块"""
+        chunk_size = chunk_size or self.chunk_size
+        offset = 0
+        while offset < len(self.data):
+            yield self.data[offset : offset + chunk_size]
+            offset += chunk_size
+
+    def read(self, size: int = -1):
+        """为了兼容性支持 read() 方法"""
+        if size == -1:
+            return self.data
+        result = self.data[self.position : self.position + size]
+        self.position += len(result)
+        return result
+
+    def seek(self, offset: int):
+        """为了兼容性支持 seek() 方法"""
+        self.position = offset
+
+    def tell(self):
+        """为了兼容性支持 tell() 方法"""
+        return self.position
+
+
+class GitHubStorage(BaseStorage):
+    """基于 GitHub 仓库的存储实现"""
+
+    def __init__(self):
+        self.repo_owner = os.getenv("GITHUB_REPO_OWNER")
+        self.repo_name = os.getenv("GITHUB_REPO_NAME")
+        self.access_token = os.getenv("GITHUB_ACCESS_TOKEN")
+        self.branch = os.getenv("GITHUB_BRANCH", "main")
+        # 反向代理 URL，用于加速 GitHub raw 文件访问
+        # 例如：https://raw. githubusercontent.com/ 的反向代理 URL
+        self.raw_proxy_url = os.getenv("GITHUB_RAW_PROXY_URL", "").rstrip("/")
+
+        if not all([self.repo_owner, self.repo_name, self.access_token]):
+            raise RuntimeError(
+                "GITHUB_REPO_OWNER, GITHUB_REPO_NAME, GITHUB_ACCESS_TOKEN must be set"
+            )
+
+        self.api_base_url = (
+            f"https://api.github.com/repos/{self.repo_owner}/{self.repo_name}"
+        )
+
+        # 如果配置了代理 URL，则使用代理 URL；否则使用官方 raw.githubusercontent.com
+        if self.raw_proxy_url:
+            self.raw_content_url = f"{self.raw_proxy_url}/https://raw.githubusercontent.com/{self.repo_owner}/{self.repo_name}/{self.branch}"
+        else:
+            self.raw_content_url = f"https://raw.githubusercontent.com/{self.repo_owner}/{self.repo_name}/{self.branch}"
+
+    def _headers(self) -> Dict[str, str]:
+        """返回 API 请求的公共头部信息"""
+        return {
+            "Authorization": f"token {self.access_token}",
+            "Accept": "application/vnd.github.v3+json",
+        }
+
+    def _get_file_sha(self, file_path: str) -> str:
+        """获取文件的 SHA 值用于更新或删除"""
+        try:
+            url = f"{self.api_base_url}/contents/{file_path}"
+            response = requests.get(url, headers=self._headers())
+            if response.status_code == 200:
+                return response.json().get("sha")
+        except Exception:
+            pass
+        return None
+
+    def _get_last_commit_time(self, file_path: str) -> datetime:
+        """获取文件的最后提交时间，返回 datetime 对象"""
+        try:
+            url = f"{self.api_base_url}/commits"
+            params = {"path": file_path, "per_page": 1}
+            response = requests.get(url, headers=self._headers(), params=params)
+            if response.status_code == 200:
+                commits = response.json()
+                if commits and len(commits) > 0:
+                    time_str = commits[0]["commit"]["author"]["date"]
+                    # 解析 ISO 格式时间字符串为 datetime 对象
+                    # 格式: "2025-11-08T10:55:26Z"
+                    return datetime.fromisoformat(time_str.replace("Z", "+00:00"))
+        except Exception:
+            pass
+        return datetime.now()
+
+    def list_objects(self, prefix: str = "") -> Dict[str, Any]:
+        """
+        列出存储桶中的对象
+
+        Args:
+            prefix: 对象前缀（用于目录浏览）
+
+        Returns:
+            包含对象列表的字典
+        """
+        try:
+            # 移除末尾的 / 以保持 GitHub API 的一致性
+            prefix = prefix.rstrip("/") if prefix else ""
+            url = (
+                f"{self.api_base_url}/contents/{prefix}"
+                if prefix
+                else f"{self.api_base_url}/contents"
+            )
+            response = requests.get(url, headers=self._headers())
+            response.raise_for_status()
+
+            contents = response.json()
+            if not isinstance(contents, list):
+                contents = [contents]
+
+            files = []
+            folders = []
+
+            for item in contents:
+                if item["type"] == "file":
+                    # 跳过 .gitkeep 文件
+                    if item["name"] == ".gitkeep":
+                        continue
+
+                    # 获取最后提交时间
+                    last_modified = self._get_last_commit_time(item["path"])
+
+                    files.append(
+                        {
+                            "Key": item["path"],
+                            "Size": item["size"],
+                            "LastModified": last_modified,
+                            "ETag": item["sha"],
+                        }
+                    )
+                elif item["type"] == "dir":
+                    folders.append({"Prefix": item["path"] + "/"})
+
+            return {
+                "Contents": files,
+                "CommonPrefixes": folders,
+                "IsTruncated": False,
+            }
+        except Exception as e:
+            return {"Contents": [], "CommonPrefixes": [], "Error": str(e)}
+
+    def get_object_info(self, key: str) -> Dict[str, Any]:
+        """
+        获取对象基本信息
+
+        Args:
+            key: 对象键名
+
+        Returns:
+            对象元数据
+        """
+        try:
+            url = f"{self.api_base_url}/contents/{key}"
+            response = requests.get(url, headers=self._headers())
+            response.raise_for_status()
+
+            data = response.json()
+            last_modified = self._get_last_commit_time(key)
+
+            return {
+                "Key": data["path"],
+                "Size": data["size"],
+                "ContentLength": data["size"],  # 为了兼容路由代码
+                "LastModified": last_modified,
+                "ETag": data["sha"],
+                "ContentType": "application/octet-stream",
+            }
+        except Exception as e:
+            raise RuntimeError(f"Failed to get object info: {str(e)}") from e
+
+    def get_object(self, key: str) -> Dict[str, Any]:
+        """
+        获取对象内容
+
+        Args:
+            key: 对象键名
+
+        Returns:
+            包含对象内容的字典，Body 支持 iter_chunks() 方法
+        """
+        try:
+            url = f"{self.raw_content_url}/{key}"
+            response = requests.get(url)
+            response.raise_for_status()
+
+            content = response.content
+            return {
+                "Body": StreamWrapper(content),
+                "ContentLength": len(content),
+                "ContentType": response.headers.get(
+                    "Content-Type", "application/octet-stream"
+                ),
+            }
+        except Exception as e:
+            raise RuntimeError(f"Failed to get object: {str(e)}") from e
+
+    def generate_presigned_url(self, key: str, expires: int = None) -> str:
+        """
+        为指定对象生成预签名 URL
+
+        Args:
+            key: 对象键名
+            expires: 过期时间（秒）
+
+        Returns:
+            预签名 URL，失败返回 None
+        """
+        try:
+            # GitHub raw 内容 URL - 直接返回文件内容
+            # 这会被前端用于下载
+            return f"{self.raw_content_url}/{key}"
+        except Exception:
+            return None
+
+    def get_public_url(self, key: str) -> str:
+        """
+        生成对象的公共访问 URL
+
+        Args:
+            key: 对象键名
+
+        Returns:
+            公共 URL，未配置返回 None
+        """
+        return f"{self.raw_content_url}/{key}"
+
+    def generate_thumbnail(self, file_path: str) -> bytes:
+        """
+        生成图片缩略图
+
+        Args:
+            file_path: 文件路径
+
+        Returns:
+            缩略图字节数据
+        """
+        try:
+            obj = self.get_object(file_path)
+            # StreamWrapper 需要转换为 BytesIO 以兼容 PIL
+            body = obj["Body"]
+            if isinstance(body, StreamWrapper):
+                image_data = body.read()
+                image_bytes = BytesIO(image_data)
+            else:
+                image_bytes = body
+
+            img = Image.open(image_bytes)
+            img.thumbnail((200, 200))
+
+            thumbnail_io = BytesIO()
+            img.save(thumbnail_io, format="JPEG")
+            thumbnail_io.seek(0)
+            return thumbnail_io.read()
+        except Exception as e:
+            raise RuntimeError(f"Failed to generate thumbnail: {str(e)}") from e
+
+    def upload_file(self, key: str, file_data: bytes, content_type: str = None) -> bool:
+        """
+        上传文件到存储
+
+        Args:
+            key: 对象键名（文件路径）
+            file_data: 文件二进制数据
+            content_type: 文件类型（MIME type）
+
+        Returns:
+            上传成功返回 True，失败返回 False
+        """
+        try:
+            url = f"{self.api_base_url}/contents/{key}"
+            encoded_content = base64.b64encode(file_data).decode("utf-8")
+
+            # 检查文件是否已存在
+            sha = self._get_file_sha(key)
+
+            data = {
+                "message": f"Upload {key}",
+                "content": encoded_content,
+                "branch": self.branch,
+            }
+
+            if sha:
+                data["sha"] = sha
+
+            response = requests.put(url, json=data, headers=self._headers())
+            response.raise_for_status()
+            return True
+        except Exception as e:
+            print(f"Upload failed: {str(e)}")
+            return False
+
+    def delete_file(self, key: str) -> bool:
+        """
+        删除存储中的文件
+
+        Args:
+            key: 对象键名（文件路径）
+
+        Returns:
+            删除成功返回 True，失败返回 False
+        """
+        try:
+            sha = self._get_file_sha(key)
+            if not sha:
+                return False
+
+            url = f"{self.api_base_url}/contents/{key}"
+            data = {
+                "message": f"Delete {key}",
+                "sha": sha,
+                "branch": self.branch,
+            }
+
+            response = requests.delete(url, json=data, headers=self._headers())
+            response.raise_for_status()
+            return True
+        except Exception as e:
+            print(f"Delete failed: {str(e)}")
+            return False
+
+    def rename_file(self, old_key: str, new_key: str) -> bool:
+        """
+        重命名存储中的文件
+
+        Args:
+            old_key: 旧的对象键名
+            new_key: 新的对象键名
+
+        Returns:
+            重命名成功返回 True，失败返回 False
+        """
+        try:
+            # 获取原文件内容
+            obj = self.get_object(old_key)
+            content = obj["Body"].read()
+
+            # 上传到新位置
+            if not self.upload_file(new_key, content):
+                return False
+
+            # 删除原文件
+            return self.delete_file(old_key)
+        except Exception as e:
+            print(f"Rename failed: {str(e)}")
+            return False
+
+    def delete_folder(self, prefix: str) -> bool:
+        """
+        删除存储中的文件夹（前缀）
+
+        Args:
+            prefix: 要删除的文件夹前缀
+
+        Returns:
+            删除成功返回 True，失败返回 False
+        """
+        try:
+            # 确保前缀以 / 结尾
+            if prefix and not prefix.endswith("/"):
+                prefix = prefix + "/"
+
+            contents = self.list_objects(prefix)
+            files = contents.get("Contents", [])
+
+            # 删除所有文件
+            for file_info in files:
+                file_key = file_info["Key"]
+                if not self.delete_file(file_key):
+                    return False
+
+            # 递归删除子文件夹
+            folders = contents.get("CommonPrefixes", [])
+            for folder in folders:
+                folder_prefix = folder["Prefix"]
+                # 确保递归时也传入正确格式的前缀（带末尾 /）
+                if not self.delete_folder(folder_prefix):
+                    return False
+
+            return True
+        except Exception as e:
+            print(f"Delete folder failed: {str(e)}")
+            return False
+
+    def rename_folder(self, old_prefix: str, new_prefix: str) -> bool:
+        """
+        重命名存储中的文件夹（前缀）
+
+        Args:
+            old_prefix: 旧的文件夹前缀
+            new_prefix: 新的文件夹前缀
+
+        Returns:
+            重命名成功返回 True，失败返回 False
+        """
+        try:
+            contents = self.list_objects(old_prefix)
+            files = contents.get("Contents", [])
+
+            for file_info in files:
+                old_key = file_info["Key"]
+                new_key = old_key.replace(old_prefix, new_prefix, 1)
+
+                if not self.rename_file(old_key, new_key):
+                    return False
+
+            return True
+        except Exception as e:
+            print(f"Rename folder failed: {str(e)}")
+            return False
+
+    def copy_file(self, source_key: str, dest_key: str) -> bool:
+        """
+        复制存储中的文件
+
+        Args:
+            source_key: 源对象键名
+            dest_key: 目标对象键名
+
+        Returns:
+            复制成功返回 True，失败返回 False
+        """
+        try:
+            obj = self.get_object(source_key)
+            content = obj["Body"].read()
+            return self.upload_file(dest_key, content)
+        except Exception as e:
+            print(f"Copy failed: {str(e)}")
+            return False
+
+    def copy_folder(self, source_prefix: str, dest_prefix: str) -> bool:
+        """
+        复制存储中的文件夹（前缀）
+
+        Args:
+            source_prefix: 源文件夹前缀
+            dest_prefix: 目标文件夹前缀
+
+        Returns:
+            复制成功返回 True，失败返回 False
+        """
+        try:
+            contents = self.list_objects(source_prefix)
+            files = contents.get("Contents", [])
+
+            for file_info in files:
+                source_key = file_info["Key"]
+                dest_key = source_key.replace(source_prefix, dest_prefix, 1)
+
+                if not self.copy_file(source_key, dest_key):
+                    return False
+
+            return True
+        except Exception as e:
+            print(f"Copy folder failed: {str(e)}")
+            return False
+
+    def create_folder(self, key: str) -> bool:
+        """
+        创建文件夹
+
+        Args:
+            key: 文件夹路径（以 / 结尾）
+
+        Returns:
+            创建成功返回 True，失败返回 False
+        """
+        try:
+            # GitHub 不需要显式创建文件夹
+            # 如果需要标记文件夹存在，可以创建 .gitkeep 文件
+            # 但为了不显示 .gitkeep，我们在这里直接返回 True
+            # 实际的文件夹会在上传文件时自动创建
+            return True
+        except Exception as e:
+            print(f"Create folder failed: {str(e)}")
+            return False

templates/index.html

@@ -1,5 +1,5 @@
-{% extends 'base.html' %} {% block title %}Cloud Index{% endblock %} {% block body_attrs
-%}data-current-prefix="{{ current_prefix }}"{% endblock %} {% block content %}
+{% extends 'base.html' %} {% block title %}Cloud Index{% endblock %} {% block body_attrs %}data-current-prefix="{{
+current_prefix }}"{% endblock %} {% block content %}
 <div class="container">
     <h1>
         Cloud Index
@@ -109,7 +109,8 @@
                     </button>
                     <button
                         class="action-link download-btn"
-                        onclick="downloadFile({{ (entry.public_url or entry.file_url)|tojson|safe }}, {{ entry.name|tojson|safe }})"
+                        data-download-key="{{ entry.key }}"
+                        data-download-name="{{ entry.name }}"
                     >
                         <i class="fas fa-download"></i> 下载
                     </button>
@@ -148,7 +149,9 @@
                 />
             </div>
             {% if entry.is_dir %}
-            <i class="fas fa-folder fa-2x" style="color: var(--folder-color)"></i>
+            <div class="grid-icon" onclick="window.location.href='/{{ entry.key.rstrip('/') }}'">
+                <i class="fas fa-folder" style="color: var(--folder-color)"></i>
+            </div>
             <a class="grid-name" href="/{{ entry.key.rstrip('/') }}">{{ entry.name }}</a>
             <div class="grid-actions">
                 <button
@@ -177,11 +180,17 @@
                 </button>
             </div>
             {% else %} {% if entry.name|fileicon == 'fas fa-image' %}
-            <div style="cursor: pointer" onclick="openPreview('{{ entry.file_url }}', '{{ entry.name }}')">
-                <img class="grid-thumb" src="{{ entry.file_url }}" alt="{{ entry.name }}" />
+            <div class="grid-thumb" onclick="openPreview('{{ entry.file_url }}', '{{ entry.name }}')">
+                <img
+                    style="width: 100%; height: 100%; object-fit: cover; border-radius: 6px"
+                    src="{{ entry.file_url }}"
+                    alt="{{ entry.name }}"
+                />
             </div>
             {% else %}
-            <i class="{{ entry.name|fileicon }} fa-2x" style="color: var(--file-color)"></i>
+            <div class="grid-icon" onclick="openPreview('{{ entry.file_url }}', '{{ entry.name }}')">
+                <i class="{{ entry.name|fileicon }}" style="color: var(--file-color)"></i>
+            </div>
             {% endif %}
             <a
                 class="grid-name"
@@ -202,7 +211,8 @@
                 </button>
                 <button
                     class="grid-action-btn download"
-                    onclick="downloadFile({{ (entry.public_url or entry.file_url)|tojson|safe }}, {{ entry.name|tojson|safe }})"
+                    data-download-key="{{ entry.key }}"
+                    data-download-name="{{ entry.name }}"
                     title="下载"
                 >
                     <i class="fas fa-download"></i>