feat: add download limit and expiry control per upload (v0.7.0)

Backend:
- model/meta.go: add MaxDownloads, ExpiresAt, Downloads fields
- opt/var.go: add X-Max-Downloads, X-Expires-In header constants; MinExpiresIn=30s, defaults
- controller/meta.go: New() accepts maxDownloads+expiresIn; CheckAndIncrDownload() validates expiry/limit and increments counter atomically; periodic cleanup for expired files
- handler/share.go: Fetch uses CheckAndIncrDownload (returns 410 on expired/limit exceeded); ShareNew and ShareAPIUpload read X-Max-Downloads/X-Expires-In headers

Frontend:
- upload.ts: UploadSettings interface; pass X-Max-Downloads and X-Expires-In headers on upload init
- panel-left.tsx: collapsible "高级设置" panel with download count (0-999) and expiry (1-24h) controls; show settings summary on upload success card

🤖 Generated with [Qoder][https://qoder.com]

frontend/src/api/token.ts

@@ -0,0 +1,53 @@
+export interface ApiToken {
+    id: number;
+    user_id: number;
+    name: string;
+    created_at: string;
+    last_used_at: string | null;
+    expires_at: string | null;
+}
+
+export interface CreateTokenRes {
+    id: number;
+    name: string;
+    token: string;
+    created_at: string;
+}
+
+const jsonHeaders: HeadersInit = {'Content-Type': 'application/json'};
+
+export const tokenApi = {
+    list: async (): Promise<ApiToken[]> => {
+        const res = await fetch('/api/token', {headers: jsonHeaders});
+        if (!res.ok) {
+            const json = await res.json().catch(() => ({}));
+            throw new Error(json.msg || '查询失败');
+        }
+        return (await res.json()).data;
+    },
+
+    create: async (name: string): Promise<CreateTokenRes> => {
+        const res = await fetch('/api/token', {
+            method: 'POST',
+            headers: jsonHeaders,
+            body: JSON.stringify({name}),
+        });
+        if (!res.ok) {
+            const json = await res.json().catch(() => ({}));
+            throw new Error(json.msg || '创建失败');
+        }
+        return (await res.json()).data;
+    },
+
+    delete: async (id: number): Promise<void> => {
+        const res = await fetch('/api/token', {
+            method: 'DELETE',
+            headers: jsonHeaders,
+            body: JSON.stringify({id}),
+        });
+        if (!res.ok) {
+            const json = await res.json().catch(() => ({}));
+            throw new Error(json.msg || '删除失败');
+        }
+    },
+};

frontend/src/api/upload.ts

@@ -1,5 +1,9 @@
 import { useState } from 'react';
 
+export interface UploadSettings {
+    maxDownloads: number;  // 0 = unlimited
+    expiresIn: number;     // seconds
+}
 
 interface UploadRes {
     code: string
@@ -10,18 +14,25 @@ export const useFileUpload = () => {
     const [loading, setLoading] = useState(false);
     const [error, setError] = useState<string | null>(null);
 
-    const uploadFile = async (file: File): Promise<string> => {
+    const uploadFile = async (file: File, settings?: UploadSettings): Promise<string> => {
         setLoading(true);
         setError(null);
         setProgress(0);
 
+        const maxDownloads = settings?.maxDownloads ?? 3;
+        const expiresIn    = settings?.expiresIn    ?? 28800;
+
         try {
             const url = `/api/ushare/${file.name}`;
 
             // 1. 初始化上传
             const res1 = await fetch(url, {
                 method: "PUT",
-                headers: {"X-File-Size": file.size.toString()}
+                headers: {
+                    "X-File-Size":      file.size.toString(),
+                    "X-Max-Downloads":  maxDownloads.toString(),
+                    "X-Expires-In":     expiresIn.toString(),
+                }
             });
 
             if (!res1.ok) {
@@ -30,7 +41,6 @@ export const useFileUpload = () => {
                     window.location.href = "/login?next=/share"
                     return ""
                 }
-
                 throw new Error("上传失败<1>");
             }
 
@@ -64,19 +74,17 @@ export const useFileUpload = () => {
                     throw new Error(`上传失败<3>: ${err}`);
                 }
 
-                // 更新进度
-                // const currentProgress = Number(((chunkIndex + 1) / totalChunks * 100).toFixed(2)); // 小数
-                const currentProgress = Math.round(((chunkIndex + 1) / totalChunks) * 100); // 整数 0-100
+                const currentProgress = Math.round(((chunkIndex + 1) / totalChunks) * 100);
                 setProgress(currentProgress);
             }
 
             return code;
         } catch (err) {
-            throw err; // 将错误继续抛出以便组件处理
+            throw err;
         } finally {
             setLoading(false);
         }
     };
 
     return { uploadFile, progress, loading, error };
-};
+};

frontend/src/main.tsx

@@ -7,6 +7,7 @@ import {FileSharing} from "./page/share/share.tsx";
 import {LocalSharing} from "./page/local/local.tsx";
 import {TestPage} from "./page/test/test.tsx";
 import {AdminPage} from "./page/admin/admin.tsx";
+import {SelfPage} from "./page/self/self.tsx";
 
 const container = document.getElementById('root')
 const root = createRoot(container!)
@@ -14,6 +15,7 @@ const router = createBrowserRouter([
     {path: "/login", element: <Login />},
     {path: "/share", element: <FileSharing />},
     {path: "/admin", element: <AdminPage />},
+    {path: "/self", element: <SelfPage />},
     {path: "/test", element: <TestPage />},
     {path: "*", element: <LocalSharing />},
 ])

frontend/src/page/self/self.tsx

@@ -0,0 +1,429 @@
+import React, {useEffect, useState} from 'react';
+import {createUseStyles} from 'react-jss';
+import {tokenApi, ApiToken, CreateTokenRes} from '../../api/token.ts';
+import {message} from '../../hook/message/u-message.tsx';
+import {UButton} from '../../component/button/u-button.tsx';
+
+const useStyle = createUseStyles({
+    container: {
+        minHeight: '100vh',
+        backgroundColor: '#e3f2fd',
+        padding: '24px',
+        boxSizing: 'border-box',
+        fontFamily: "'Segoe UI', Arial, sans-serif",
+    },
+    header: {
+        display: 'flex',
+        alignItems: 'center',
+        gap: '16px',
+        marginBottom: '24px',
+    },
+    backBtn: {
+        background: 'transparent',
+        border: '2px solid #2c9678',
+        color: '#2c9678',
+        borderRadius: '6px',
+        padding: '6px 14px',
+        cursor: 'pointer',
+        fontSize: '14px',
+        transition: 'background-color 0.2s',
+        '&:hover': {backgroundColor: 'rgba(44,150,120,0.1)'},
+    },
+    title: {
+        color: '#2c9678',
+        margin: 0,
+        fontSize: '22px',
+        fontWeight: 600,
+    },
+    card: {
+        backgroundColor: '#C8E6C9',
+        boxShadow: 'inset 0 0 15px rgba(56, 142, 60, 0.15)',
+        borderRadius: '15px',
+        padding: '24px',
+        marginBottom: '24px',
+    },
+    cardTitle: {
+        color: '#2c9678',
+        marginTop: 0,
+        marginBottom: '16px',
+        fontSize: '16px',
+        fontWeight: 600,
+    },
+    table: {
+        width: '100%',
+        borderCollapse: 'collapse',
+        fontSize: '14px',
+    },
+    th: {
+        backgroundColor: 'rgba(44,150,120,0.15)',
+        padding: '10px 12px',
+        textAlign: 'left',
+        color: '#2c9678',
+        fontWeight: 600,
+        borderBottom: '2px solid rgba(44,150,120,0.3)',
+    },
+    td: {
+        padding: '10px 12px',
+        borderBottom: '1px solid rgba(44,150,120,0.2)',
+        color: '#333',
+    },
+    trHover: {
+        '&:hover': {backgroundColor: 'rgba(44,150,120,0.05)'},
+    },
+    emptyRow: {
+        textAlign: 'center',
+        color: '#888',
+        padding: '24px',
+    },
+    actionBtn: {
+        padding: '4px 12px',
+        borderRadius: '4px',
+        border: 'none',
+        cursor: 'pointer',
+        fontSize: '13px',
+        transition: 'opacity 0.2s',
+        '&:hover': {opacity: 0.8},
+    },
+    deleteBtn: {
+        backgroundColor: '#e53935',
+        color: 'white',
+    },
+    topBar: {
+        display: 'flex',
+        justifyContent: 'space-between',
+        alignItems: 'center',
+        marginBottom: '16px',
+    },
+    // Dialog overlay
+    overlay: {
+        position: 'fixed',
+        inset: 0,
+        backgroundColor: 'rgba(0,0,0,0.4)',
+        display: 'flex',
+        alignItems: 'center',
+        justifyContent: 'center',
+        zIndex: 1000,
+    },
+    dialog: {
+        backgroundColor: '#C8E6C9',
+        borderRadius: '15px',
+        padding: '28px',
+        width: '440px',
+        maxWidth: '90vw',
+        boxShadow: '0 8px 32px rgba(0,0,0,0.2)',
+    },
+    dialogTitle: {
+        color: '#2c9678',
+        marginTop: 0,
+        marginBottom: '20px',
+        fontSize: '16px',
+        fontWeight: 600,
+    },
+    label: {
+        display: 'block',
+        color: '#2c9678',
+        fontSize: '13px',
+        marginBottom: '6px',
+        fontWeight: 500,
+    },
+    input: {
+        width: '100%',
+        padding: '8px 12px',
+        borderRadius: '6px',
+        border: '1px solid rgba(44,150,120,0.4)',
+        fontSize: '14px',
+        marginBottom: '16px',
+        boxSizing: 'border-box',
+        backgroundColor: 'rgba(255,255,255,0.8)',
+        outline: 'none',
+        '&:focus': {borderColor: '#2c9678'},
+    },
+    dialogFooter: {
+        display: 'flex',
+        gap: '10px',
+        justifyContent: 'flex-end',
+    },
+    cancelBtn: {
+        padding: '8px 18px',
+        borderRadius: '6px',
+        border: '2px solid #2c9678',
+        background: 'transparent',
+        color: '#2c9678',
+        cursor: 'pointer',
+        fontSize: '14px',
+        '&:hover': {backgroundColor: 'rgba(44,150,120,0.1)'},
+    },
+    tokenValueBox: {
+        backgroundColor: 'rgba(255,255,255,0.9)',
+        borderRadius: '8px',
+        padding: '12px 14px',
+        fontFamily: 'monospace',
+        fontSize: '13px',
+        wordBreak: 'break-all',
+        marginBottom: '12px',
+        color: '#1a1a2e',
+        border: '1px solid rgba(44,150,120,0.4)',
+    },
+    warningText: {
+        color: '#e53935',
+        fontSize: '12px',
+        marginBottom: '16px',
+    },
+    copyBtn: {
+        padding: '8px 18px',
+        borderRadius: '6px',
+        border: 'none',
+        background: '#2c9678',
+        color: 'white',
+        cursor: 'pointer',
+        fontSize: '14px',
+        '&:hover': {backgroundColor: '#1f6d5a'},
+    },
+    usageCard: {
+        backgroundColor: 'rgba(255,255,255,0.5)',
+        borderRadius: '10px',
+        padding: '16px 20px',
+    },
+    usageTitle: {
+        color: '#2c9678',
+        margin: '0 0 10px',
+        fontSize: '14px',
+        fontWeight: 600,
+    },
+    pre: {
+        margin: '6px 0',
+        padding: '10px 14px',
+        backgroundColor: '#1a1a2e',
+        color: '#c3e88d',
+        borderRadius: '6px',
+        fontSize: '13px',
+        overflowX: 'auto',
+        fontFamily: 'monospace',
+    },
+});
+
+interface Session {
+    user_id: number;
+    username: string;
+    role_label: string;
+    permissions: string[];
+}
+
+export const SelfPage: React.FC = () => {
+    const style = useStyle();
+    const [session, setSession] = useState<Session | null>(null);
+    const [tokens, setTokens] = useState<ApiToken[]>([]);
+    const [loading, setLoading] = useState(true);
+    const [showCreate, setShowCreate] = useState(false);
+    const [newTokenName, setNewTokenName] = useState('');
+    const [creating, setCreating] = useState(false);
+    const [createdToken, setCreatedToken] = useState<CreateTokenRes | null>(null);
+
+    useEffect(() => {
+        fetch('/api/uauth/me')
+            .then(async res => {
+                if (!res.ok) {
+                    window.location.href = '/login';
+                    return;
+                }
+                const json = await res.json();
+                const s: Session = json.data;
+                setSession(s);
+                if (!s.permissions.includes('token_manage')) {
+                    message.warning('无 Token 管理权限');
+                    return;
+                }
+                return loadTokens();
+            })
+            .catch(() => {
+                window.location.href = '/login';
+            })
+            .finally(() => setLoading(false));
+    }, []);
+
+    async function loadTokens() {
+        try {
+            const list = await tokenApi.list();
+            setTokens(list ?? []);
+        } catch (e: unknown) {
+            message.error(e instanceof Error ? e.message : '加载失败');
+        }
+    }
+
+    async function handleCreate() {
+        if (!newTokenName.trim()) {
+            message.warning('请输入 Token 名称');
+            return;
+        }
+        setCreating(true);
+        try {
+            const res = await tokenApi.create(newTokenName.trim());
+            setCreatedToken(res);
+            setNewTokenName('');
+            setShowCreate(false);
+            await loadTokens();
+        } catch (e: unknown) {
+            message.error(e instanceof Error ? e.message : '创建失败');
+        } finally {
+            setCreating(false);
+        }
+    }
+
+    async function handleDelete(id: number, name: string) {
+        if (!confirm(`确认吊销 Token「${name}」？`)) return;
+        try {
+            await tokenApi.delete(id);
+            message.success('已吊销');
+            setTokens(prev => prev.filter(t => t.id !== id));
+        } catch (e: unknown) {
+            message.error(e instanceof Error ? e.message : '操作失败');
+        }
+    }
+
+    function handleCopyToken(val: string) {
+        navigator.clipboard.writeText(val)
+            .then(() => message.success('已复制到剪贴板'))
+            .catch(() => message.warning('复制失败，请手动复制'));
+    }
+
+    function formatDate(s: string | null) {
+        if (!s) return '-';
+        return new Date(s).toLocaleString();
+    }
+
+    const hasTokenPerm = session?.permissions.includes('token_manage') ?? false;
+
+    return (
+        <div className={style.container}>
+            <div className={style.header}>
+                <button className={style.backBtn} onClick={() => window.history.back()}>← 返回</button>
+                <h2 className={style.title}>个人中心</h2>
+            </div>
+
+            {!loading && session && (
+                <>
+                    {/* User info card */}
+                    <div className={style.card}>
+                        <h3 className={style.cardTitle}>账号信息</h3>
+                        <p style={{margin: '4px 0', color: '#333', fontSize: '14px'}}>
+                            用户名：<strong>{session.username}</strong>
+                        </p>
+                        <p style={{margin: '4px 0', color: '#333', fontSize: '14px'}}>
+                            角色：<strong>{session.role_label}</strong>
+                        </p>
+                    </div>
+
+                    {/* Token management card */}
+                    {hasTokenPerm && (
+                        <div className={style.card}>
+                            <div className={style.topBar}>
+                                <h3 className={style.cardTitle} style={{margin: 0}}>API Token</h3>
+                                <UButton onClick={() => setShowCreate(true)}>+ 新建 Token</UButton>
+                            </div>
+
+                            <table className={style.table}>
+                                <thead>
+                                <tr>
+                                    <th className={style.th}>名称</th>
+                                    <th className={style.th}>创建时间</th>
+                                    <th className={style.th}>最后使用</th>
+                                    <th className={style.th}>操作</th>
+                                </tr>
+                                </thead>
+                                <tbody>
+                                {tokens.length === 0 ? (
+                                    <tr>
+                                        <td className={style.td} colSpan={4} style={{textAlign: 'center', color: '#888'}}>
+                                            暂无 Token，点击「新建 Token」创建
+                                        </td>
+                                    </tr>
+                                ) : (
+                                    tokens.map(t => (
+                                        <tr key={t.id} className={style.trHover}>
+                                            <td className={style.td}>{t.name}</td>
+                                            <td className={style.td}>{formatDate(t.created_at)}</td>
+                                            <td className={style.td}>{formatDate(t.last_used_at)}</td>
+                                            <td className={style.td}>
+                                                <button
+                                                    className={`${style.actionBtn} ${style.deleteBtn}`}
+                                                    onClick={() => handleDelete(t.id, t.name)}
+                                                >
+                                                    吊销
+                                                </button>
+                                            </td>
+                                        </tr>
+                                    ))
+                                )}
+                                </tbody>
+                            </table>
+
+                            {/* Usage guide */}
+                            <div style={{marginTop: '20px'}}>
+                                <div className={style.usageCard}>
+                                    <p className={style.usageTitle}>使用方式（curl 示例）</p>
+                                    <pre className={style.pre}>{`curl -H "Authorization: Bearer <your_token>" \\
+     -T <file_path> \\
+     https://<your_domain>/api/v1/upload/<filename>`}</pre>
+                                    <p style={{margin: '8px 0 4px', color: '#555', fontSize: '13px'}}>返回示例：</p>
+                                    <pre className={style.pre}>{`{"status":200,"data":{"code":"ABCD1234"}}`}</pre>
+                                    <p style={{margin: '8px 0 4px', color: '#555', fontSize: '13px'}}>下载文件：</p>
+                                    <pre className={style.pre}>{`https://<your_domain>/ushare/<code>`}</pre>
+                                </div>
+                            </div>
+                        </div>
+                    )}
+
+                    {!hasTokenPerm && (
+                        <div className={style.card}>
+                            <p style={{color: '#888', margin: 0}}>当前角色无 Token 管理权限</p>
+                        </div>
+                    )}
+                </>
+            )}
+
+            {/* Create token dialog */}
+            {showCreate && (
+                <div className={style.overlay} onClick={() => setShowCreate(false)}>
+                    <div className={style.dialog} onClick={e => e.stopPropagation()}>
+                        <h3 className={style.dialogTitle}>新建 API Token</h3>
+                        <label className={style.label}>Token 名称</label>
+                        <input
+                            className={style.input}
+                            placeholder="例：服务器上传脚本"
+                            value={newTokenName}
+                            onChange={e => setNewTokenName(e.target.value)}
+                            onKeyDown={e => e.key === 'Enter' && handleCreate()}
+                            autoFocus
+                        />
+                        <div className={style.dialogFooter}>
+                            <button className={style.cancelBtn} onClick={() => setShowCreate(false)}>取消</button>
+                            <UButton onClick={handleCreate} loading={creating} disabled={creating}>
+                                创建
+                            </UButton>
+                        </div>
+                    </div>
+                </div>
+            )}
+
+            {/* Newly created token display - shown only once */}
+            {createdToken && (
+                <div className={style.overlay} onClick={() => setCreatedToken(null)}>
+                    <div className={style.dialog} onClick={e => e.stopPropagation()}>
+                        <h3 className={style.dialogTitle}>Token 已创建</h3>
+                        <p className={style.warningText}>
+                            请立即复制并妥善保存，Token 值仅显示一次，关闭后无法再次查看！
+                        </p>
+                        <label className={style.label}>Token 名称：{createdToken.name}</label>
+                        <div className={style.tokenValueBox}>{createdToken.token}</div>
+                        <div className={style.dialogFooter}>
+                            <button className={style.cancelBtn} onClick={() => setCreatedToken(null)}>关闭</button>
+                            <button className={style.copyBtn} onClick={() => handleCopyToken(createdToken.token)}>
+                                复制 Token
+                            </button>
+                        </div>
+                    </div>
+                </div>
+            )}
+        </div>
+    );
+};

frontend/src/page/share/component/nav-bar.tsx

@@ -0,0 +1,81 @@
+import React, {useEffect, useState} from 'react';
+import {createUseStyles} from 'react-jss';
+
+const useStyle = createUseStyles({
+    nav: {
+        display: 'flex',
+        alignItems: 'center',
+        justifyContent: 'space-between',
+        padding: '0 24px',
+        height: '48px',
+        backgroundColor: '#2c9678',
+        boxShadow: '0 2px 6px rgba(0,0,0,0.15)',
+        flexShrink: 0,
+    },
+    brand: {
+        color: 'white',
+        fontWeight: 700,
+        fontSize: '18px',
+        letterSpacing: '1px',
+        textDecoration: 'none',
+    },
+    links: {
+        display: 'flex',
+        gap: '8px',
+        alignItems: 'center',
+    },
+    link: {
+        color: 'rgba(255,255,255,0.9)',
+        fontSize: '13px',
+        textDecoration: 'none',
+        padding: '5px 12px',
+        borderRadius: '4px',
+        transition: 'background-color 0.2s',
+        '&:hover': {
+            backgroundColor: 'rgba(255,255,255,0.2)',
+            color: 'white',
+        },
+    },
+    divider: {
+        color: 'rgba(255,255,255,0.4)',
+        fontSize: '13px',
+    },
+});
+
+export const NavBar: React.FC = () => {
+    const style = useStyle();
+    const [isAdmin, setIsAdmin] = useState(false);
+    const [hasTokenPerm, setHasTokenPerm] = useState(false);
+
+    useEffect(() => {
+        fetch('/api/uauth/me').then(async res => {
+            if (res.ok) {
+                const json = await res.json();
+                const perms: string[] = json.data?.permissions ?? [];
+                setIsAdmin(perms.includes('user_manage'));
+                setHasTokenPerm(perms.includes('token_manage'));
+            }
+        }).catch(() => {});
+    }, []);
+
+    const showLinks = isAdmin || hasTokenPerm;
+
+    return (
+        <nav className={style.nav}>
+            <a href="/share" className={style.brand}>UShare</a>
+            {showLinks && (
+                <div className={style.links}>
+                    {hasTokenPerm && (
+                        <a href="/self" className={style.link}>个人中心</a>
+                    )}
+                    {isAdmin && hasTokenPerm && (
+                        <span className={style.divider}>|</span>
+                    )}
+                    {isAdmin && (
+                        <a href="/admin" className={style.link}>管理控制台</a>
+                    )}
+                </div>
+            )}
+        </nav>
+    );
+};

frontend/src/page/share/component/panel-left.tsx

@@ -1,9 +1,9 @@
 import {createUseStyles} from "react-jss";
 import {UButton} from "../../../component/button/u-button.tsx";
-import React, {useEffect, useState} from "react";
+import React, {useState} from "react";
 import {useStore} from "../../../store/share.ts";
 import {message} from "../../../hook/message/u-message.tsx";
-import {useFileUpload} from "../../../api/upload.ts";
+import {useFileUpload, UploadSettings} from "../../../api/upload.ts";
 
 const useUploadStyle = createUseStyles({
     container: {
@@ -60,15 +60,65 @@ const useUploadStyle = createUseStyles({
         cursor: 'pointer',
         '&:hover': {}
     },
-    adminLink: {
-        display: 'block',
-        textAlign: 'center',
+    // Advanced settings
+    advToggle: {
         marginTop: '16px',
+        display: 'flex',
+        alignItems: 'center',
+        gap: '6px',
+        cursor: 'pointer',
         color: '#2c9678',
-        fontSize: '12px',
-        textDecoration: 'none',
-        opacity: 0.8,
-        '&:hover': {opacity: 1, textDecoration: 'underline'},
+        fontSize: '13px',
+        userSelect: 'none',
+        opacity: 0.75,
+        '&:hover': {opacity: 1},
+    },
+    advPanel: {
+        marginTop: '12px',
+        padding: '14px 16px',
+        backgroundColor: 'rgba(255,255,255,0.5)',
+        borderRadius: '10px',
+        display: 'flex',
+        flexDirection: 'column',
+        gap: '12px',
+    },
+    advRow: {
+        display: 'flex',
+        alignItems: 'center',
+        justifyContent: 'space-between',
+        gap: '12px',
+    },
+    advLabel: {
+        color: '#2c9678',
+        fontSize: '13px',
+        fontWeight: 500,
+        flexShrink: 0,
+    },
+    advInput: {
+        width: '80px',
+        padding: '5px 8px',
+        borderRadius: '5px',
+        border: '1px solid rgba(44,150,120,0.4)',
+        fontSize: '13px',
+        textAlign: 'center',
+        outline: 'none',
+        backgroundColor: 'rgba(255,255,255,0.8)',
+        '&:focus': {borderColor: '#2c9678'},
+    },
+    advSelect: {
+        padding: '5px 8px',
+        borderRadius: '5px',
+        border: '1px solid rgba(44,150,120,0.4)',
+        fontSize: '13px',
+        outline: 'none',
+        backgroundColor: 'rgba(255,255,255,0.8)',
+        color: '#333',
+        cursor: 'pointer',
+        '&:focus': {borderColor: '#2c9678'},
+    },
+    advHint: {
+        fontSize: '11px',
+        color: '#888',
     },
 })
 
@@ -125,7 +175,7 @@ const useShowStyle = createUseStyles({
         height: "24px",
         cursor: "pointer",
         "&:hover": {
-            boxShadow:  "20px 20px 60px #fff, -20px -20px 60px #fff",
+            boxShadow: "20px 20px 60px #fff, -20px -20px 60px #fff",
         },
     },
     codeWrapper: {
@@ -173,36 +223,47 @@ const useShowStyle = createUseStyles({
             fontSize: "12px",
         },
     },
+    metaInfo: {
+        fontSize: '12px',
+        color: '#555',
+        marginTop: '10px',
+        display: 'flex',
+        gap: '16px',
+        flexWrap: 'wrap',
+    },
+    metaItem: {
+        display: 'flex',
+        alignItems: 'center',
+        gap: '4px',
+    },
 });
 
+// Expiry options (hours) shown in the dropdown
+const EXPIRY_OPTIONS = [1, 2, 4, 8, 12, 24];
+
 export const PanelLeft = () => {
-    const [code, set_code] = useState("")
+    const [code, setCode] = useState("")
+    const [settings, setSettings] = useState<UploadSettings>({maxDownloads: 3, expiresIn: 8 * 3600})
 
     if (code) {
-        return <PanelLeftShow code={code} set_code={set_code} />
+        return <PanelLeftShow code={code} set_code={setCode} settings={settings}/>
     }
 
-    return <PanelLeftUpload  set_code={set_code}/>
+    return <PanelLeftUpload set_code={setCode} settings={settings} setSettings={setSettings}/>
 };
 
-const PanelLeftUpload: React.FC<{ set_code: (code:string) => void }> = ({set_code}) => {
+const PanelLeftUpload: React.FC<{
+    set_code: (code: string) => void;
+    settings: UploadSettings;
+    setSettings: (s: UploadSettings) => void;
+}> = ({set_code, settings, setSettings}) => {
     const style = useUploadStyle()
     const {file, setFile} = useStore()
     const {uploadFile, progress, loading} = useFileUpload();
-    const [isAdmin, setIsAdmin] = useState(false);
-
-    useEffect(() => {
-        fetch('/api/uauth/me').then(async res => {
-            if (res.ok) {
-                const json = await res.json();
-                const perms: string[] = json.data?.permissions ?? [];
-                setIsAdmin(perms.includes('user_manage'));
-            }
-        }).catch(() => {});
-    }, []);
+    const [showAdv, setShowAdv] = useState(false);
 
     function onFileSelect() {
-        // @ts-ignore
+        // @ts-expect-error no types for direct DOM query
         document.querySelector('#real-file-input').click();
     }
 
@@ -211,11 +272,8 @@ const PanelLeftUpload: React.FC<{ set_code: (code:string) => void }> = ({set_cod
     }
 
     async function onFileUpload() {
-        if (!file) {
-            return
-        }
-
-        const code = await uploadFile(file)
+        if (!file) return;
+        const code = await uploadFile(file, settings)
         set_code(code)
     }
 
@@ -223,37 +281,76 @@ const PanelLeftUpload: React.FC<{ set_code: (code:string) => void }> = ({set_cod
         setFile(null)
     }
 
+    function onMaxDownloadsChange(e: React.ChangeEvent<HTMLInputElement>) {
+        let v = parseInt(e.target.value, 10);
+        if (isNaN(v) || v < 0) v = 0;
+        if (v > 999) v = 999;
+        setSettings({...settings, maxDownloads: v});
+    }
+
+    function onExpiryChange(e: React.ChangeEvent<HTMLSelectElement>) {
+        setSettings({...settings, expiresIn: parseInt(e.target.value, 10)});
+    }
+
     return <div className={style.container}>
         <div className={style.form}>
             <h2 className={style.title}>上传文件</h2>
-            {
-                !file && !loading &&
-                <UButton onClick={onFileSelect}>选择文件</UButton>
-            }
-            {
-                file && !loading &&
-                <UButton onClick={onFileUpload}>上传文件</UButton>
-            }
-            {
-                loading &&
-                <UButton process={progress} loading={loading}>上传中</UButton>
-            }
+            {!file && !loading && <UButton onClick={onFileSelect}>选择文件</UButton>}
+            {file && !loading && <UButton onClick={onFileUpload}>上传文件</UButton>}
+            {loading && <UButton process={progress} loading={loading}>上传中</UButton>}
             <input type="file" className={style.file} id="real-file-input" onChange={onFileChange}/>
-            {
-                file &&
+            {file && (
                 <div className={style.preview}>
                     <div className={style.clean} onClick={onFileClean}>×</div>
                     <div className={style.name}>{file.name}</div>
                 </div>
-            }
-            {isAdmin && (
-                <a href="/admin" className={style.adminLink}>管理控制台</a>
+            )}
+
+            {/* Advanced settings toggle */}
+            <div className={style.advToggle} onClick={() => setShowAdv(v => !v)}>
+                <span>{showAdv ? '▾' : '▸'}</span>
+                <span>高级设置</span>
+            </div>
+
+            {showAdv && (
+                <div className={style.advPanel}>
+                    <div className={style.advRow}>
+                        <span className={style.advLabel}>下载次数限制</span>
+                        <div style={{display: 'flex', alignItems: 'center', gap: '8px'}}>
+                            <input
+                                type="number"
+                                min={0}
+                                max={999}
+                                className={style.advInput}
+                                value={settings.maxDownloads}
+                                onChange={onMaxDownloadsChange}
+                            />
+                            <span className={style.advHint}>0 = 不限制</span>
+                        </div>
+                    </div>
+                    <div className={style.advRow}>
+                        <span className={style.advLabel}>过期时间</span>
+                        <select
+                            className={style.advSelect}
+                            value={settings.expiresIn}
+                            onChange={onExpiryChange}
+                        >
+                            {EXPIRY_OPTIONS.map(h => (
+                                <option key={h} value={h * 3600}>{h} 小时</option>
+                            ))}
+                        </select>
+                    </div>
+                </div>
             )}
         </div>
     </div>
 }
 
-const PanelLeftShow: React.FC<{ code: string; set_code: (code: string) => void }> = ({ code, set_code }) => {
+const PanelLeftShow: React.FC<{
+    code: string;
+    set_code: (code: string) => void;
+    settings: UploadSettings;
+}> = ({code, set_code, settings}) => {
     const classes = useShowStyle();
 
     const handleCopy = async () => {
@@ -265,30 +362,33 @@ const PanelLeftShow: React.FC<{ code: string; set_code: (code: string) => void }
         }
     };
 
+    const expiryHours = Math.round(settings.expiresIn / 3600);
+    const downloadLimit = settings.maxDownloads === 0 ? '不限' : `${settings.maxDownloads} 次`;
+
     return (
         <div className={classes.container}>
-
             <div className={classes.form}>
                 <button
                     className={classes.closeButton}
                     onClick={() => set_code('')}
                     aria-label="关闭"
-                >
-                    ×
-                </button>
-                <h2 className={classes.title}>
-                    上传成功!
-                </h2>
+                >×</button>
+                <h2 className={classes.title}>上传成功!</h2>
 
                 <div className={classes.codeWrapper}>
                     <pre className={classes.pre}>
                         <code>{code}</code>
                         <button className={classes.copyButton} onClick={handleCopy}>
-                        一键复制
-                    </button>
+                            一键复制
+                        </button>
                     </pre>
                 </div>
+
+                <div className={classes.metaInfo}>
+                    <span className={classes.metaItem}>下载限制：{downloadLimit}</span>
+                    <span className={classes.metaItem}>有效期：{expiryHours} 小时</span>
+                </div>
             </div>
         </div>
     );
-};
+};

frontend/src/page/share/share.tsx

@@ -2,17 +2,23 @@ import {createUseStyles} from 'react-jss'
 import {PanelLeft} from "./component/panel-left.tsx";
 import {PanelRight} from "./component/panel-right.tsx";
 import {PanelMid} from "./component/panel-mid.tsx";
+import {NavBar} from "./component/nav-bar.tsx";
 
 const useStyle = createUseStyles({
     "@global": {
         margin: 0,
         padding: 0,
     },
+    wrapper: {
+        display: 'flex',
+        flexDirection: 'column',
+        height: '100vh',
+    },
     container: {
-        margin: 0,
-        height: "100vh",
+        flex: 1,
         display: "grid",
         gridTemplateColumns: "40% 20% 40%",
+        overflow: 'hidden',
 
         "@media (max-width: 768px)": {
             gridTemplateColumns: "100%",
@@ -24,9 +30,14 @@ const useStyle = createUseStyles({
 
 export const FileSharing = () => {
     const style = useStyle()
-        return <div className={style.container}>
-        <PanelLeft />
-        <PanelMid />
-        <PanelRight/>
-    </div>
-};
+    return (
+        <div className={style.wrapper}>
+            <NavBar />
+            <div className={style.container}>
+                <PanelLeft />
+                <PanelMid />
+                <PanelRight />
+            </div>
+        </div>
+    );
+};

internal/api/api.go

@@ -50,6 +50,17 @@ func Start(ctx context.Context) <-chan struct{} {
 		api.Get("/roles", handler.AuthVerify(), handler.AuthPermission(model.PermUserManage), handler.AdminListRoles())
 	}
 
+	// Token management
+	{
+		api := app.Group("/api/token")
+		api.Get("", handler.AuthVerify(), handler.AuthPermission(model.PermTokenManage), handler.TokenList())
+		api.Post("", handler.AuthVerify(), handler.AuthPermission(model.PermTokenManage), handler.TokenCreate())
+		api.Delete("", handler.AuthVerify(), handler.AuthPermission(model.PermTokenManage), handler.TokenDelete())
+	}
+
+	// API v1 - token-authenticated file upload
+	app.Put("/api/v1/upload/:filename", handler.AuthVerify(), handler.AuthPermission(model.PermUpload), handler.ShareAPIUpload())
+
 	// Frontend static files
 	app.Use(handler.ServeFrontendMiddleware())
 

internal/controller/meta.go

@@ -3,34 +3,38 @@ package controller
 import (
 	"context"
 	"fmt"
-	"github.com/loveuer/nf/nft/log"
-	"github.com/loveuer/ushare/internal/model"
-	"github.com/loveuer/ushare/internal/opt"
-	gonanoid "github.com/matoous/go-nanoid/v2"
-	"github.com/spf13/viper"
 	"io"
 	"os"
 	"path/filepath"
 	"strings"
 	"sync"
 	"time"
+
+	gonanoid "github.com/matoous/go-nanoid/v2"
+	"github.com/loveuer/nf/nft/log"
+	"github.com/loveuer/ushare/internal/model"
+	"github.com/loveuer/ushare/internal/opt"
+	"github.com/pkg/errors"
+	"github.com/spf13/viper"
 )
 
 type metaInfo struct {
-	f      *os.File
-	name   string
-	create time.Time
-	last   time.Time
-	size   int64
-	cursor int64
-	user   string
+	f            *os.File
+	name         string
+	create       time.Time
+	last         time.Time
+	size         int64
+	cursor       int64
+	user         string
+	maxDownloads int
+	expiresAt    int64
 }
 
 func (m *metaInfo) generateMeta(code string) error {
-	content := fmt.Sprintf("filename=%s\ncreated_at=%d\nsize=%d\nuploader=%s",
-		m.name, m.create.UnixMilli(), m.size, m.user,
+	content := fmt.Sprintf(
+		"filename=%s\ncreated_at=%d\nsize=%d\nuploader=%s\nmax_downloads=%d\nexpires_at=%d\ndownloads=0",
+		m.name, m.create.UnixMilli(), m.size, m.user, m.maxDownloads, m.expiresAt,
 	)
-
 	return os.WriteFile(opt.MetaPath(code), []byte(content), 0644)
 }
 
@@ -46,8 +50,19 @@ var (
 
 const letters = "1234567890ABCDEFGHIJKLMNOPQRSTUVWXYZ"
 
-func (m *meta) New(size int64, filename, ip string) (string, error) {
+// New creates a new upload session.
+// maxDownloads: 0 = unlimited; expiresIn: seconds from now (minimum opt.MinExpiresIn).
+func (m *meta) New(size int64, filename, ip string, maxDownloads int, expiresIn int64) (string, error) {
 	now := time.Now()
+
+	if expiresIn < opt.MinExpiresIn {
+		expiresIn = opt.DefaultExpiresIn
+	}
+
+	if maxDownloads < 0 {
+		maxDownloads = 0
+	}
+
 	code, err := gonanoid.Generate(letters, opt.CodeLength)
 	if err != nil {
 		return "", err
@@ -66,7 +81,17 @@ func (m *meta) New(size int64, filename, ip string) (string, error) {
 	m.Lock()
 	defer m.Unlock()
 
-	m.m[code] = &metaInfo{f: f, name: filename, last: now, size: size, cursor: 0, create: now, user: ip}
+	m.m[code] = &metaInfo{
+		f:            f,
+		name:         filename,
+		last:         now,
+		size:         size,
+		cursor:       0,
+		create:       now,
+		user:         ip,
+		maxDownloads: maxDownloads,
+		expiresAt:    now.Unix() + expiresIn,
+	}
 
 	return code, nil
 }
@@ -100,6 +125,67 @@ func (m *meta) Write(code string, start, end int64, reader io.Reader) (total, cu
 	return total, cursor, nil
 }
 
+// CheckAndIncrDownload reads the meta file, validates expiry and download limit,
+// increments the download counter, and writes the meta file back.
+// Returns the meta on success, or an error if the file is unavailable.
+func (m *meta) CheckAndIncrDownload(code string) (*model.Meta, error) {
+	m.Lock()
+	defer m.Unlock()
+
+	metaPath := opt.MetaPath(code)
+
+	v := viper.New()
+	v.SetConfigFile(metaPath)
+	v.SetConfigType("env")
+	if err := v.ReadInConfig(); err != nil {
+		return nil, errors.New("文件不存在或已过期")
+	}
+
+	info := new(model.Meta)
+	if err := v.Unmarshal(info); err != nil {
+		return nil, errors.New("文件元数据损坏")
+	}
+
+	now := time.Now().Unix()
+
+	// Check expiry
+	if info.ExpiresAt > 0 && now > info.ExpiresAt {
+		// Clean up expired files
+		go func() {
+			_ = os.RemoveAll(opt.FilePath(code))
+			_ = os.RemoveAll(metaPath)
+		}()
+		return nil, errors.New("文件已过期")
+	}
+
+	// Check download limit
+	if info.MaxDownloads > 0 && info.Downloads >= info.MaxDownloads {
+		return nil, errors.New("文件下载次数已达上限")
+	}
+
+	// Increment downloads and write back
+	info.Downloads++
+	content := fmt.Sprintf(
+		"filename=%s\ncreated_at=%d\nsize=%d\nuploader=%s\nmax_downloads=%d\nexpires_at=%d\ndownloads=%d",
+		info.Filename, info.CreatedAt, info.Size, info.Uploader,
+		info.MaxDownloads, info.ExpiresAt, info.Downloads,
+	)
+	if err := os.WriteFile(metaPath, []byte(content), 0644); err != nil {
+		log.Warn("meta.CheckAndIncrDownload: write back failed: %s", err.Error())
+	}
+
+	// If this was the last allowed download, clean up after serving
+	if info.MaxDownloads > 0 && info.Downloads >= info.MaxDownloads {
+		go func() {
+			time.Sleep(5 * time.Second)
+			_ = os.RemoveAll(opt.FilePath(code))
+			_ = os.RemoveAll(metaPath)
+		}()
+	}
+
+	return info, nil
+}
+
 func (m *meta) Start(ctx context.Context) {
 	ticker := time.NewTicker(time.Minute)
 	m.ctx = ctx
@@ -108,7 +194,7 @@ func (m *meta) Start(ctx context.Context) {
 		log.Fatal("controller.MetaManager.Start: mkdir datapath failed, path = %s, err = %s", opt.Cfg.DataPath, err.Error())
 	}
 
-	// 清理 2 分钟内没有继续上传的 part
+	// Clean uploads with no activity for 2 minutes
 	go func() {
 		for {
 			select {
@@ -133,7 +219,7 @@ func (m *meta) Start(ctx context.Context) {
 		}
 	}()
 
-	// 清理一天前的文件
+	// Clean expired files by walking the data directory
 	go func() {
 		if opt.Cfg.CleanInterval <= 0 {
 			log.Warn("meta.Clean: no clean interval set, plz clean manual!!!")
@@ -148,12 +234,10 @@ func (m *meta) Start(ctx context.Context) {
 			case <-ctx.Done():
 				return
 			case now := <-ticker.C:
-				//log.Debug("meta.Clean: 开始清理过期文件 = %v", duration)
 				_ = filepath.Walk(opt.Cfg.DataPath, func(path string, info os.FileInfo, err error) error {
 					if info == nil {
 						return nil
 					}
-
 					if info.IsDir() {
 						return nil
 					}
@@ -163,36 +247,33 @@ func (m *meta) Start(ctx context.Context) {
 						return nil
 					}
 
-					viper.SetConfigFile(path)
-					viper.SetConfigType("env")
-					if err = viper.ReadInConfig(); err != nil {
-						// todo log
+					v := viper.New()
+					v.SetConfigFile(path)
+					v.SetConfigType("env")
+					if err = v.ReadInConfig(); err != nil {
 						return nil
 					}
 
 					mi := new(model.Meta)
-
-					if err = viper.Unmarshal(mi); err != nil {
-						// todo log
+					if err = v.Unmarshal(mi); err != nil {
 						return nil
 					}
 
 					code := strings.TrimPrefix(name, ".meta.")
 
+					// Remove if past explicit expiry
+					if mi.ExpiresAt > 0 && now.Unix() > mi.ExpiresAt {
+						log.Debug("controller.meta: file expired, code = %s", code)
+						_ = os.RemoveAll(opt.FilePath(code))
+						_ = os.RemoveAll(path)
+						return nil
+					}
+
+					// Remove if past global clean interval
 					if now.Sub(time.UnixMilli(mi.CreatedAt)) > duration {
-
-						log.Debug("controller.meta: file out of date, code = %s, user_key = %s", code, mi.Uploader)
-
-						if err = os.RemoveAll(opt.FilePath(code)); err != nil {
-							log.Warn("meta.Clean: remove file failed, file = %s, err = %s", opt.FilePath(code), err.Error())
-						}
-						if err = os.RemoveAll(path); err != nil {
-							log.Warn("meta.Clean: remove file failed, file = %s, err = %s", path, err.Error())
-						}
-
-						m.Lock()
-						delete(m.m, code)
-						m.Unlock()
+						log.Debug("controller.meta: file out of date, code = %s", code)
+						_ = os.RemoveAll(opt.FilePath(code))
+						_ = os.RemoveAll(path)
 					}
 
 					return nil

internal/controller/token.go

@@ -0,0 +1,105 @@
+package controller
+
+import (
+	"strings"
+	"time"
+
+	"github.com/loveuer/ushare/internal/model"
+	"github.com/loveuer/ushare/internal/pkg/db"
+	"github.com/loveuer/ushare/internal/pkg/tool"
+	"github.com/pkg/errors"
+)
+
+type tokenManager struct{}
+
+var TokenManager = &tokenManager{}
+
+// List returns all tokens belonging to a user (token value is not exposed).
+func (tm *tokenManager) List(userID uint) ([]model.Token, error) {
+	var tokens []model.Token
+	if err := db.Default.Session().Where("user_id = ?", userID).Order("created_at desc").Find(&tokens).Error; err != nil {
+		return nil, errors.Wrap(err, "list tokens failed")
+	}
+	return tokens, nil
+}
+
+// Create generates a new API token for the given user and returns the full token value (only shown once).
+func (tm *tokenManager) Create(userID uint, name string) (*model.Token, string, error) {
+	name = strings.TrimSpace(name)
+	if name == "" {
+		return nil, "", errors.New("token 名称不能为空")
+	}
+
+	rawToken := model.TokenPrefix + tool.RandomString(32)
+
+	t := &model.Token{
+		UserID: userID,
+		Name:   name,
+		Token:  rawToken,
+	}
+
+	if err := db.Default.Session().Create(t).Error; err != nil {
+		return nil, "", errors.Wrap(err, "create token failed")
+	}
+
+	return t, rawToken, nil
+}
+
+// Delete removes a token by ID, only if it belongs to the given user.
+func (tm *tokenManager) Delete(userID uint, tokenID uint) error {
+	result := db.Default.Session().
+		Where("id = ? AND user_id = ?", tokenID, userID).
+		Delete(&model.Token{})
+
+	if result.Error != nil {
+		return errors.Wrap(result.Error, "delete token failed")
+	}
+
+	if result.RowsAffected == 0 {
+		return errors.New("token 不存在或无权限删除")
+	}
+
+	return nil
+}
+
+// Verify looks up a DB API token and returns a Session if valid.
+func (tm *tokenManager) Verify(rawToken string) (*model.Session, error) {
+	var t model.Token
+	if err := db.Default.Session().Where("token = ?", rawToken).First(&t).Error; err != nil {
+		return nil, errors.New("无效的 API Token")
+	}
+
+	if t.ExpiresAt != nil && time.Now().After(*t.ExpiresAt) {
+		return nil, errors.New("API Token 已过期")
+	}
+
+	var user model.User
+	if err := db.Default.Session().First(&user, t.UserID).Error; err != nil {
+		return nil, errors.New("Token 关联用户不存在")
+	}
+
+	if !user.Active {
+		return nil, errors.New("账号已被禁用")
+	}
+
+	var role model.Role
+	if err := db.Default.Session().First(&role, user.RoleID).Error; err != nil {
+		return nil, errors.New("账号角色异常")
+	}
+
+	// Update last_used_at asynchronously
+	now := time.Now()
+	go db.Default.Session().Model(&t).Update("last_used_at", now) //nolint:errcheck
+
+	session := &model.Session{
+		UserID:      user.ID,
+		Username:    user.Username,
+		Role:        role.Name,
+		RoleLabel:   role.Label,
+		Permissions: role.PermissionList(),
+		LoginAt:     now.Unix(),
+		Token:       rawToken,
+	}
+
+	return session, nil
+}

internal/controller/user.go

@@ -89,7 +89,6 @@ func (um *userManager) Login(username, password string) (*model.Session, error)
 	user := new(model.User)
 	if err := db.Default.Session().
 		Where("username = ? AND active = ?", username, true).
-		Preload("Role").
 		First(user).Error; err != nil {
 		return nil, errors.New("账号或密码错误")
 	}
@@ -98,12 +97,17 @@ func (um *userManager) Login(username, password string) (*model.Session, error)
 		return nil, errors.New("账号或密码错误")
 	}
 
+	var role model.Role
+	if err := db.Default.Session().First(&role, user.RoleID).Error; err != nil {
+		return nil, errors.New("账号角色异常，请联系管理员")
+	}
+
 	session := &model.Session{
 		UserID:      user.ID,
 		Username:    user.Username,
-		Role:        user.Role.Name,
-		RoleLabel:   user.Role.Label,
-		Permissions: user.Role.PermissionList(),
+		Role:        role.Name,
+		RoleLabel:   role.Label,
+		Permissions: role.PermissionList(),
 		LoginAt:     now.Unix(),
 		Token:       tool.RandomString(32),
 	}

internal/handler/admin.go

@@ -3,6 +3,7 @@ package handler
 import (
 	"net/http"
 	"strings"
+	"time"
 
 	"github.com/loveuer/nf"
 	"github.com/loveuer/nf/nft/log"
@@ -12,14 +13,65 @@ import (
 	"github.com/spf13/cast"
 )
 
+// userResp is the JSON response shape for a user including role info,
+// built manually at the business layer instead of relying on GORM associations.
+type userResp struct {
+	ID        uint       `json:"id"`
+	Username  string     `json:"username"`
+	RoleID    uint       `json:"role_id"`
+	Role      model.Role `json:"role"`
+	Active    bool       `json:"active"`
+	CreatedAt time.Time  `json:"created_at"`
+	UpdatedAt time.Time  `json:"updated_at"`
+}
+
+func toUserResp(u model.User, r model.Role) userResp {
+	return userResp{
+		ID:        u.ID,
+		Username:  u.Username,
+		RoleID:    u.RoleID,
+		Role:      r,
+		Active:    u.Active,
+		CreatedAt: u.CreatedAt,
+		UpdatedAt: u.UpdatedAt,
+	}
+}
+
 func AdminListUsers() nf.HandlerFunc {
 	return func(c *nf.Ctx) error {
 		var users []model.User
-		if err := db.Default.Session().Preload("Role").Find(&users).Error; err != nil {
+		if err := db.Default.Session().Find(&users).Error; err != nil {
 			log.Error("handler.AdminListUsers: %s", err.Error())
 			return c.Status(http.StatusInternalServerError).JSON(map[string]string{"msg": "查询失败"})
 		}
-		return c.Status(http.StatusOK).JSON(map[string]any{"data": users})
+
+		// Collect unique role IDs and query them in one shot
+		roleIDSet := make(map[uint]struct{})
+		for _, u := range users {
+			roleIDSet[u.RoleID] = struct{}{}
+		}
+		roleIDs := make([]uint, 0, len(roleIDSet))
+		for id := range roleIDSet {
+			roleIDs = append(roleIDs, id)
+		}
+
+		var roles []model.Role
+		if err := db.Default.Session().Where("id IN ?", roleIDs).Find(&roles).Error; err != nil {
+			log.Error("handler.AdminListUsers: query roles: %s", err.Error())
+			return c.Status(http.StatusInternalServerError).JSON(map[string]string{"msg": "查询失败"})
+		}
+
+		roleMap := make(map[uint]model.Role, len(roles))
+		for _, r := range roles {
+			roleMap[r.ID] = r
+		}
+
+		resp := make([]userResp, 0, len(users))
+		for _, u := range users {
+			resp = append(resp, toUserResp(u, roleMap[u.RoleID]))
+		}
+
+		return c.Status(http.StatusOK).JSON(map[string]any{"data": resp})
 	}
 }
 
@@ -57,6 +109,11 @@ func AdminCreateUser() nf.HandlerFunc {
 			return c.Status(http.StatusBadRequest).JSON(map[string]string{"msg": "用户名已存在"})
 		}
 
+		var role model.Role
+		if err := db.Default.Session().First(&role, req.RoleID).Error; err != nil {
+			return c.Status(http.StatusBadRequest).JSON(map[string]string{"msg": "无效的角色"})
+		}
+
 		user := &model.User{
 			Username: req.Username,
 			Password: tool.NewPassword(req.Password),
@@ -69,11 +126,7 @@ func AdminCreateUser() nf.HandlerFunc {
 			return c.Status(http.StatusInternalServerError).JSON(map[string]string{"msg": "创建用户失败"})
 		}
 
-		if err := db.Default.Session().Preload("Role").First(user, user.ID).Error; err != nil {
-			log.Error("handler.AdminCreateUser: preload role: %s", err.Error())
-		}
-
-		return c.Status(http.StatusOK).JSON(map[string]any{"data": user})
+		return c.Status(http.StatusOK).JSON(map[string]any{"data": toUserResp(*user, role)})
 	}
 }
 
@@ -97,11 +150,16 @@ func AdminUpdateUser() nf.HandlerFunc {
 
 		session := c.Locals("user").(*model.Session)
 
-		user := new(model.User)
-		if err := db.Default.Session().Preload("Role").First(user, id).Error; err != nil {
+		var user model.User
+		if err := db.Default.Session().First(&user, id).Error; err != nil {
 			return c.Status(http.StatusNotFound).JSON(map[string]string{"msg": "用户不存在"})
 		}
 
+		var currentRole model.Role
+		if err := db.Default.Session().First(&currentRole, user.RoleID).Error; err != nil {
+			return c.Status(http.StatusInternalServerError).JSON(map[string]string{"msg": "查询角色失败"})
+		}
+
 		updates := map[string]any{}
 
 		if req.RoleID != nil && *req.RoleID != user.RoleID {
@@ -110,7 +168,7 @@ func AdminUpdateUser() nf.HandlerFunc {
 				return c.Status(http.StatusBadRequest).JSON(map[string]string{"msg": "无效的角色"})
 			}
 			// If demoting from admin, ensure at least one other active admin remains
-			if user.Role.Name == model.RoleAdmin && newRole.Name != model.RoleAdmin {
+			if currentRole.Name == model.RoleAdmin && newRole.Name != model.RoleAdmin {
 				var adminCount int64
 				db.Default.Session().Model(&model.User{}).
 					Where("role_id = ? AND active = ? AND id != ?", user.RoleID, true, id).
@@ -120,13 +178,14 @@ func AdminUpdateUser() nf.HandlerFunc {
 				}
 			}
 			updates["role_id"] = *req.RoleID
+			currentRole = newRole
 		}
 
 		if req.Active != nil && *req.Active != user.Active {
 			if user.ID == session.UserID && !*req.Active {
 				return c.Status(http.StatusBadRequest).JSON(map[string]string{"msg": "不能禁用自己的账号"})
 			}
-			if user.Role.Name == model.RoleAdmin && !*req.Active {
+			if currentRole.Name == model.RoleAdmin && !*req.Active {
 				var adminCount int64
 				db.Default.Session().Model(&model.User{}).
 					Where("role_id = ? AND active = ? AND id != ?", user.RoleID, true, id).
@@ -149,16 +208,12 @@ func AdminUpdateUser() nf.HandlerFunc {
 			return c.Status(http.StatusBadRequest).JSON(map[string]string{"msg": "没有需要更新的字段"})
 		}
 
-		if err := db.Default.Session().Model(user).Updates(updates).Error; err != nil {
+		if err := db.Default.Session().Model(&user).Updates(updates).Error; err != nil {
 			log.Error("handler.AdminUpdateUser: %s", err.Error())
 			return c.Status(http.StatusInternalServerError).JSON(map[string]string{"msg": "更新失败"})
 		}
 
-		if err := db.Default.Session().Preload("Role").First(user, user.ID).Error; err != nil {
-			log.Error("handler.AdminUpdateUser: preload: %s", err.Error())
-		}
-
-		return c.Status(http.StatusOK).JSON(map[string]any{"data": user})
+		return c.Status(http.StatusOK).JSON(map[string]any{"data": toUserResp(user, currentRole)})
 	}
 }
 
@@ -174,13 +229,18 @@ func AdminDeleteUser() nf.HandlerFunc {
 			return c.Status(http.StatusBadRequest).JSON(map[string]string{"msg": "不能删除自己的账号"})
 		}
 
-		user := new(model.User)
-		if err := db.Default.Session().Preload("Role").First(user, id).Error; err != nil {
+		var user model.User
+		if err := db.Default.Session().First(&user, id).Error; err != nil {
 			return c.Status(http.StatusNotFound).JSON(map[string]string{"msg": "用户不存在"})
 		}
 
-		// Prevent deleting the last admin
-		if user.Role.Name == model.RoleAdmin {
+		// Prevent deleting the last admin: check via role name
+		var userRole model.Role
+		if err := db.Default.Session().First(&userRole, user.RoleID).Error; err != nil {
+			return c.Status(http.StatusInternalServerError).JSON(map[string]string{"msg": "查询角色失败"})
+		}
+
+		if userRole.Name == model.RoleAdmin {
 			var adminCount int64
 			db.Default.Session().Model(&model.User{}).
 				Where("role_id = ? AND id != ?", user.RoleID, id).
@@ -190,7 +250,7 @@ func AdminDeleteUser() nf.HandlerFunc {
 			}
 		}
 
-		if err := db.Default.Session().Delete(user).Error; err != nil {
+		if err := db.Default.Session().Delete(&user).Error; err != nil {
 			log.Error("handler.AdminDeleteUser: %s", err.Error())
 			return c.Status(http.StatusInternalServerError).JSON(map[string]string{"msg": "删除失败"})
 		}

internal/handler/auth.go

@@ -3,6 +3,7 @@ package handler
 import (
 	"fmt"
 	"net/http"
+	"strings"
 
 	"github.com/loveuer/nf"
 	"github.com/loveuer/ushare/internal/controller"
@@ -11,8 +12,12 @@ import (
 
 func AuthVerify() nf.HandlerFunc {
 	tokenFn := func(c *nf.Ctx) (token string) {
-		if token = c.Get("Authorization"); token != "" {
-			return
+		if raw := c.Get("Authorization"); raw != "" {
+			// Strip "Bearer " prefix if present
+			if strings.HasPrefix(raw, "Bearer ") {
+				return strings.TrimPrefix(raw, "Bearer ")
+			}
+			return raw
 		}
 		token = c.Cookies("ushare")
 		return
@@ -24,7 +29,18 @@ func AuthVerify() nf.HandlerFunc {
 			return c.Status(http.StatusUnauthorized).JSON(map[string]string{"error": "unauthorized"})
 		}
 
-		session, err := controller.UserManager.Verify(token)
+		var (
+			session *model.Session
+			err     error
+		)
+
+		// API tokens have the "ust_" prefix; session tokens do not.
+		if strings.HasPrefix(token, model.TokenPrefix) {
+			session, err = controller.TokenManager.Verify(token)
+		} else {
+			session, err = controller.UserManager.Verify(token)
+		}
+
 		if err != nil {
 			return c.Status(http.StatusUnauthorized).JSON(map[string]string{"error": "unauthorized", "msg": err.Error()})
 		}

internal/handler/share.go

@@ -2,42 +2,34 @@ package handler
 
 import (
 	"fmt"
-	"github.com/loveuer/nf"
-	"github.com/loveuer/nf/nft/log"
-	"github.com/loveuer/ushare/internal/controller"
-	"github.com/loveuer/ushare/internal/model"
-	"github.com/loveuer/ushare/internal/opt"
-	"github.com/pkg/errors"
-	"github.com/spf13/cast"
-	"github.com/spf13/viper"
 	"net/http"
 	"os"
 	"regexp"
 	"strings"
+
+	"github.com/loveuer/nf"
+	"github.com/loveuer/nf/nft/log"
+	"github.com/loveuer/ushare/internal/controller"
+	"github.com/loveuer/ushare/internal/opt"
+	"github.com/pkg/errors"
+	"github.com/spf13/cast"
 )
 
 func Fetch() nf.HandlerFunc {
 	return func(c *nf.Ctx) error {
 		code := c.Param("code")
 		log.Debug("handler.Fetch: code = %s", code)
-		info := new(model.Meta)
-		_, err := os.Stat(opt.MetaPath(code))
-		if err != nil {
+
+		if _, err := os.Stat(opt.MetaPath(code)); err != nil {
 			if errors.Is(err, os.ErrNotExist) {
 				return c.Status(http.StatusNotFound).JSON(map[string]string{"msg": "文件不存在"})
 			}
-
 			return c.SendStatus(http.StatusInternalServerError)
 		}
 
-		viper.SetConfigFile(opt.MetaPath(code))
-		viper.SetConfigType("env")
-		if err = viper.ReadInConfig(); err != nil {
-			return c.SendStatus(http.StatusInternalServerError)
-		}
-
-		if err = viper.Unmarshal(info); err != nil {
-			return c.SendStatus(http.StatusInternalServerError)
+		info, err := controller.MetaManager.CheckAndIncrDownload(code)
+		if err != nil {
+			return c.Status(http.StatusGone).JSON(map[string]string{"msg": err.Error()})
 		}
 
 		c.SetHeader("Content-Disposition", fmt.Sprintf(`attachment; filename="%s"`, info.Filename))
@@ -59,7 +51,21 @@ func ShareNew() nf.HandlerFunc {
 			return c.Status(http.StatusBadRequest).JSON(map[string]string{"msg": "miss header: " + opt.HeaderSize})
 		}
 
-		code, err := controller.MetaManager.New(size, filename, c.IP())
+		maxDownloads := opt.DefaultMaxDownloads
+		if v := c.Get(opt.HeaderMaxDownload); v != "" {
+			if n, err := cast.ToIntE(v); err == nil && n >= 0 {
+				maxDownloads = n
+			}
+		}
+
+		expiresIn := int64(opt.DefaultExpiresIn)
+		if v := c.Get(opt.HeaderExpiresIn); v != "" {
+			if n, err := cast.ToInt64E(v); err == nil && n >= opt.MinExpiresIn {
+				expiresIn = n
+			}
+		}
+
+		code, err := controller.MetaManager.New(size, filename, c.IP(), maxDownloads, expiresIn)
 		if err != nil {
 			return c.Status(http.StatusInternalServerError).JSON(map[string]string{"msg": ""})
 		}
@@ -116,3 +122,50 @@ func ShareUpload() nf.HandlerFunc {
 		return c.Status(http.StatusOK).JSON(map[string]any{"size": total, "cursor": cursor})
 	}
 }
+
+// ShareAPIUpload handles one-step file upload via API token.
+// PUT /api/v1/upload/:filename
+// Optional headers: X-Max-Downloads, X-Expires-In (seconds).
+func ShareAPIUpload() nf.HandlerFunc {
+	return func(c *nf.Ctx) error {
+		filename := strings.TrimSpace(c.Param("filename"))
+		if filename == "" {
+			return c.Status(http.StatusBadRequest).JSON(map[string]string{"msg": "filename required"})
+		}
+
+		size, err := cast.ToInt64E(c.Request.ContentLength)
+		if err != nil || size <= 0 {
+			return c.Status(http.StatusBadRequest).JSON(map[string]string{"msg": "Content-Length header required"})
+		}
+
+		maxDownloads := opt.DefaultMaxDownloads
+		if v := c.Get(opt.HeaderMaxDownload); v != "" {
+			if n, err := cast.ToIntE(v); err == nil && n >= 0 {
+				maxDownloads = n
+			}
+		}
+
+		expiresIn := int64(opt.DefaultExpiresIn)
+		if v := c.Get(opt.HeaderExpiresIn); v != "" {
+			if n, err := cast.ToInt64E(v); err == nil && n >= opt.MinExpiresIn {
+				expiresIn = n
+			}
+		}
+
+		code, err := controller.MetaManager.New(size, filename, c.IP(), maxDownloads, expiresIn)
+		if err != nil {
+			return c.Status(http.StatusInternalServerError).JSON(map[string]string{"msg": "create upload failed"})
+		}
+
+		_, _, err = controller.MetaManager.Write(code, 0, size-1, c.Request.Body)
+		if err != nil {
+			log.Error("handler.ShareAPIUpload: write error: %s", err)
+			return c.Status(http.StatusInternalServerError).JSON(map[string]string{"msg": "upload failed"})
+		}
+
+		return c.Status(http.StatusOK).JSON(map[string]any{
+			"status": 200,
+			"data":   map[string]string{"code": code},
+		})
+	}
+}

internal/handler/token.go

@@ -0,0 +1,85 @@
+package handler
+
+import (
+	"net/http"
+
+	"github.com/loveuer/nf"
+	"github.com/loveuer/ushare/internal/controller"
+	"github.com/loveuer/ushare/internal/model"
+)
+
+func TokenList() nf.HandlerFunc {
+	return func(c *nf.Ctx) error {
+		session, ok := c.Locals("user").(*model.Session)
+		if !ok || session == nil {
+			return c.Status(http.StatusUnauthorized).JSON(map[string]string{"error": "unauthorized"})
+		}
+
+		tokens, err := controller.TokenManager.List(session.UserID)
+		if err != nil {
+			return c.Status(http.StatusInternalServerError).JSON(map[string]string{"msg": err.Error()})
+		}
+
+		return c.Status(http.StatusOK).JSON(map[string]any{"data": tokens})
+	}
+}
+
+func TokenCreate() nf.HandlerFunc {
+	return func(c *nf.Ctx) error {
+		session, ok := c.Locals("user").(*model.Session)
+		if !ok || session == nil {
+			return c.Status(http.StatusUnauthorized).JSON(map[string]string{"error": "unauthorized"})
+		}
+
+		type Req struct {
+			Name string `json:"name"`
+		}
+
+		var req Req
+		if err := c.BodyParser(&req); err != nil {
+			return c.Status(http.StatusBadRequest).JSON(map[string]string{"msg": "请求格式错误"})
+		}
+
+		t, rawToken, err := controller.TokenManager.Create(session.UserID, req.Name)
+		if err != nil {
+			return c.Status(http.StatusBadRequest).JSON(map[string]string{"msg": err.Error()})
+		}
+
+		return c.Status(http.StatusOK).JSON(map[string]any{
+			"data": map[string]any{
+				"id":         t.ID,
+				"name":       t.Name,
+				"token":      rawToken,
+				"created_at": t.CreatedAt,
+			},
+		})
+	}
+}
+
+func TokenDelete() nf.HandlerFunc {
+	return func(c *nf.Ctx) error {
+		session, ok := c.Locals("user").(*model.Session)
+		if !ok || session == nil {
+			return c.Status(http.StatusUnauthorized).JSON(map[string]string{"error": "unauthorized"})
+		}
+
+		type Req struct {
+			ID uint `json:"id"`
+		}
+
+		var req Req
+		if err := c.BodyParser(&req); err != nil {
+			return c.Status(http.StatusBadRequest).JSON(map[string]string{"msg": "请求格式错误"})
+		}
+
+		if req.ID == 0 {
+			return c.Status(http.StatusBadRequest).JSON(map[string]string{"msg": "token id 不能为空"})
+		}
+
+		if err := controller.TokenManager.Delete(session.UserID, req.ID); err != nil {
+			return c.Status(http.StatusBadRequest).JSON(map[string]string{"msg": err.Error()})
+		}
+
+		return c.Status(http.StatusOK).JSON(map[string]any{"data": "ok"})
+	}
+}

internal/model/meta.go

@@ -1,8 +1,11 @@
 package model
 
 type Meta struct {
-	Filename  string `json:"filename" mapstructure:"filename"`
-	CreatedAt int64  `json:"created_at" mapstructure:"created_at"`
-	Size      int64  `json:"size" mapstructure:"size"`
-	Uploader  string `json:"uploader" mapstructure:"uploader"`
+	Filename     string `json:"filename"      mapstructure:"filename"`
+	CreatedAt    int64  `json:"created_at"    mapstructure:"created_at"`
+	Size         int64  `json:"size"          mapstructure:"size"`
+	Uploader     string `json:"uploader"      mapstructure:"uploader"`
+	MaxDownloads int    `json:"max_downloads" mapstructure:"max_downloads"`
+	ExpiresAt    int64  `json:"expires_at"    mapstructure:"expires_at"`
+	Downloads    int    `json:"downloads"     mapstructure:"downloads"`
 }

internal/model/token.go

@@ -0,0 +1,18 @@
+package model
+
+import "time"
+
+// Token is a personal API token for programmatic file upload.
+// Token values are prefixed with "ust_" to distinguish them from session tokens.
+type Token struct {
+	ID         uint       `gorm:"primarykey" json:"id"`
+	UserID     uint       `gorm:"not null;index" json:"user_id"`
+	Name       string     `gorm:"not null" json:"name"`
+	Token      string     `gorm:"uniqueIndex;not null" json:"-"`
+	CreatedAt  time.Time  `json:"created_at"`
+	LastUsedAt *time.Time `json:"last_used_at"`
+	ExpiresAt  *time.Time `json:"expires_at"`
+}
+
+// TokenPrefix is the prefix for all API token values.
+const TokenPrefix = "ust_"

internal/model/user.go

@@ -8,7 +8,6 @@ type User struct {
 	Username  string    `gorm:"uniqueIndex;not null" json:"username"`
 	Password  string    `gorm:"not null" json:"-"`
 	RoleID    uint      `gorm:"not null" json:"role_id"`
-	Role      Role      `gorm:"foreignKey:RoleID" json:"role"`
 	Active    bool      `gorm:"default:true" json:"active"`
 	CreatedAt time.Time `json:"created_at"`
 	UpdatedAt time.Time `json:"updated_at"`

internal/opt/var.go

@@ -3,9 +3,18 @@ package opt
 import "path/filepath"
 
 const (
-	Meta       = ".meta."
-	HeaderSize = "X-File-Size"
-	CodeLength = 8
+	Meta              = ".meta."
+	HeaderSize        = "X-File-Size"
+	HeaderMaxDownload = "X-Max-Downloads"
+	HeaderExpiresIn   = "X-Expires-In"
+	CodeLength        = 8
+
+	// MinExpiresIn is the minimum allowed expiry in seconds (30s for testing).
+	MinExpiresIn = 30
+	// DefaultExpiresIn is the default expiry in seconds (8 hours).
+	DefaultExpiresIn = 8 * 3600
+	// DefaultMaxDownloads is the default max download count (0 = unlimited).
+	DefaultMaxDownloads = 3
 )
 
 func FilePath(code string) string {

main.go

@@ -48,7 +48,7 @@ func main() {
 	}
 	log.Debug("main: db initialized at %s", dbPath)
 
-	if err := db.Default.Migrate(&model.Role{}, &model.User{}); err != nil {
+	if err := db.Default.Migrate(&model.Role{}, &model.User{}, &model.Token{}); err != nil {
 		log.Fatal("main: db migrate failed: %s", err.Error())
 	}