Cache URL Manager - 缓存任意公开链接，让上不了互联网的人也能访问。

README.md

Cache URL Manager

缓存网络地址，方便不能上互联网的用户访问互联网地址。

说明

默认密码：admin123 参数USE_REWRITE设置伪静态开关，没有配置伪静态设置为False。

伪静态

<IfModule mod_rewrite.c>
    RewriteEngine On
    
    # 管理界面保持原样
    RewriteCond %{REQUEST_URI} ^/index\.php$ [NC]
    RewriteRule ^ - [L]
    
    # URL访问伪静态: /url/xxx
    RewriteRule ^url/(.*)$ index.php?url=$1 [L,QSA]
    
    # 定时任务伪静态: /cron/token
    RewriteRule ^cron/(.*)$ index.php?cron=$1 [L,QSA]
    
    # 防止直接访问数据文件和缓存目录
    RewriteRule ^(_urls\.php|cache/|CACHE_DIR) - [F,L]
</IfModule>

index.php

<?php
// index.php

// 配置区域
define('ADMIN_PASSWORD', 'admin123'); // 管理员密码
define('CRON_TOKEN', 'cron123'); // 定时任务token
define('CACHE_DIR', 'cache/');       // 缓存目录
define('URLS_FILE', '_urls.php');    // 链接存储文件
define('USE_REWRITE', true);         // 是否使用伪静态URL，true为启用，false为禁用

// 初始化
session_start();
if (!file_exists(CACHE_DIR)) mkdir(CACHE_DIR, 0755, true);
if (!file_exists(URLS_FILE)) file_put_contents(URLS_FILE, "<?php\n\$urls = array();\n?>");

// 包含链接文件
require_once URLS_FILE;

// 处理URL请求
if (isset($_GET['url'])) {
    handleUrlRequest($_GET['url']);
    exit;
}

// 处理定时任务
if (isset($_GET['cron'])) {
    handleCronRequest($_GET['cron']);
    exit;
}

// 处理一键缓存
if (isset($_GET['refresh_all'])) {
    handleRefreshAll();
    exit;
}

// 处理管理界面
handleAdminInterface();

// 函数定义

/**
 * 处理URL请求
 */
function handleUrlRequest($url) {
    global $urls;
    
    $urlHash = md5($url);
    $cacheFile = CACHE_DIR . $urlHash . '.tmp';
    
    // 如果缓存存在，直接返回
    if (file_exists($cacheFile)) {
        header('Content-Type: ' . mime_content_type($cacheFile));
        readfile($cacheFile);
        return;
    }
    
    // 检查URL是否在列表中
    if (!isset($urls[$urlHash])) {
        http_response_code(404);
        echo "URL not found in database";
        return;
    }
    
    // 下载并缓存文件
    $content = @file_get_contents($url);
    if ($content === false) {
        http_response_code(500);
        echo "Failed to fetch URL content";
        return;
    }
    
    file_put_contents($cacheFile, $content);
    header('Content-Type: ' . mime_content_type($cacheFile));
    echo $content;
}

/**
 * 处理定时任务
 */
function handleCronRequest($token) {
    global $urls;
    
    if ($token !== CRON_TOKEN) {
        http_response_code(403);
        echo "Invalid token";
        return;
    }
    
    $updated = 0;
    foreach ($urls as $urlHash => $url) {
        $cacheFile = CACHE_DIR . $urlHash . '.tmp';
        $remoteContent = @file_get_contents($url);
        
        if ($remoteContent === false) continue;
        
        // 如果缓存不存在或内容不同，则更新
        if (!file_exists($cacheFile) || md5_file($cacheFile) !== md5($remoteContent)) {
            file_put_contents($cacheFile, $remoteContent);
            $updated++;
        }
    }
    
    echo "Cron job completed. Updated $updated files.";
}

/**
 * 处理一键缓存
 */
function handleRefreshAll() {
    global $urls;
    
    if (!isset($_SESSION['logged_in']) || $_SESSION['logged_in'] !== true) {
        http_response_code(403);
        echo "Access denied";
        return;
    }
    
    $updated = 0;
    foreach ($urls as $urlHash => $url) {
        $cacheFile = CACHE_DIR . $urlHash . '.tmp';
        $remoteContent = @file_get_contents($url);
        
        if ($remoteContent === false) continue;
        
        file_put_contents($cacheFile, $remoteContent);
        $updated++;
    }
    
    header('Location: ' . $_SERVER['PHP_SELF'] . '?refresh_success=' . $updated);
    exit;
}

/**
 * 处理管理界面
 */
function handleAdminInterface() {
    global $urls;
    
    // 检查登录状态
    if (!isset($_SESSION['logged_in']) || $_SESSION['logged_in'] !== true) {
        // 处理登录
        if (isset($_POST['password']) && $_POST['password'] === ADMIN_PASSWORD) {
            $_SESSION['logged_in'] = true;
        } else {
            showLoginForm();
            return;
        }
    }
    
    // 处理登出
    if (isset($_GET['logout'])) {
        session_destroy();
        header('Location: ' . $_SERVER['PHP_SELF']);
        exit;
    }
    
    // 处理添加URL
    if (isset($_POST['new_url'])) {
        $newUrl = trim($_POST['new_url']);
        if (!empty($newUrl) && filter_var($newUrl, FILTER_VALIDATE_URL)) {
            $urlHash = md5($newUrl);
            $urls[$urlHash] = $newUrl;
            saveUrls();
        }
    }
    
    // 处理删除URL
    if (isset($_GET['delete'])) {
        $urlHash = $_GET['delete'];
        if (isset($urls[$urlHash])) {
            unset($urls[$urlHash]);
            saveUrls();
            
            // 删除对应的缓存文件
            $cacheFile = CACHE_DIR . $urlHash . '.tmp';
            if (file_exists($cacheFile)) {
                unlink($cacheFile);
            }
        }
        header('Location: ' . $_SERVER['PHP_SELF']);
        exit;
    }
    
    // 显示管理界面
    showAdminInterface();
}

/**
 * 保存URL列表
 */
function saveUrls() {
    global $urls;
    $content = "<?php\n\$urls = array(\n";
    foreach ($urls as $hash => $url) {
        $content .= "    '$hash' => '$url',\n";
    }
    $content .= ");\n?>";
    file_put_contents(URLS_FILE, $content);
}

/**
 * 显示登录表单
 */
function showLoginForm() {
    echo <<<HTML
<!DOCTYPE html>
<html>
<head>
    <title>Login - Cache URL Manager</title>
    <style>
        body { font-family: Arial, sans-serif; max-width: 500px; margin: 0 auto; padding: 20px; }
        form { background: #f9f9f9; padding: 20px; border-radius: 5px; }
        input[type="password"] { width: 100%; padding: 8px; margin: 8px 0; box-sizing: border-box; }
        input[type="submit"] { background: #4CAF50; color: white; padding: 10px 15px; border: none; border-radius: 4px; cursor: pointer; }
        input[type="submit"]:hover { background: #45a049; }
    </style>
</head>
<body>
    <h2>Login</h2>
    <form method="post">
        <label for="password">Password:</label>
        <input type="password" id="password" name="password" required>
        <input type="submit" value="Login">
    </form>
</body>
</html>
HTML;
}

/**
 * 显示管理界面
 */
function showAdminInterface() {
    global $urls;
    
    // 获取当前URL信息
    $scheme = isset($_SERVER['HTTPS']) && $_SERVER['HTTPS'] === 'on' ? "https" : "http";
    $host = $_SERVER['HTTP_HOST'];
    $port = $_SERVER['SERVER_PORT'];
    $path = rtrim(dirname($_SERVER['SCRIPT_NAME']), '/');
    
    // 构建完整的URL
    $baseUrl = "$scheme://$host";
    if (($scheme === 'http' && $port != 80) || ($scheme === 'https' && $port != 443)) {
        $baseUrl .= ":$port";
    }
    $baseUrl .= "$path";
    
    // 根据是否启用伪静态设置不同的URL格式
    if (USE_REWRITE) {
        $fullCronUrl = "$baseUrl/cron/" . CRON_TOKEN;
    } else {
        $fullCronUrl = "$baseUrl/index.php?cron=" . CRON_TOKEN;
    }
    
    // 刷新成功消息
    $refreshMessage = '';
    if (isset($_GET['refresh_success'])) {
        $count = intval($_GET['refresh_success']);
        $refreshMessage = '<div class="alert success">Successfully refreshed ' . $count . ' cached files.</div>';
    }
    
    echo <<<HTML
<!DOCTYPE html>
<html>
<head>
    <title>Cache URL Manager</title>
    <style>
        body { font-family: Arial, sans-serif; max-width: 800px; margin: 0 auto; padding: 20px; }
        .header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 20px; }
        .logout { background: #f44336; color: white; padding: 8px 15px; border-radius: 4px; text-decoration: none; display: inline-block; }
        .logout:hover { background: #d32f2f; }
        .refresh-btn { background: #ff9800; color: white; padding: 8px 15px; border-radius: 4px; text-decoration: none; display: inline-block; margin-right: 10px; }
        .refresh-btn:hover { background: #f57c00; }
        .url-form { background: #f9f9f9; padding: 20px; border-radius: 5px; margin-bottom: 20px; }
        .url-input { width: 70%; padding: 8px; margin-right: 10px; }
        .submit-btn { background: #4CAF50; color: white; padding: 8px 15px; border: none; border-radius: 4px; cursor: pointer; }
        .submit-btn:hover { background: #45a049; }
        .url-list { list-style: none; padding: 0; }
        .url-item { background: white; padding: 10px 15px; margin-bottom: 5px; border-radius: 4px; box-shadow: 0 1px 3px rgba(0,0,0,0.1); }
        .delete-btn { color: #f44336; text-decoration: none; margin-left: 15px; }
        .copy-btn { color: #2196F3; text-decoration: none; margin-left: 10px; }
        .cache-info { font-size: 0.8em; color: #666; margin-left: 10px; }
        .cron-section { background: #f0f7ff; padding: 15px; border-radius: 5px; margin: 20px 0; }
        .cron-url { background: white; padding: 10px; border-radius: 4px; font-family: monospace; margin: 10px 0; word-break: break-all; }
        .copy-btn-main { background: #2196F3; color: white; border: none; padding: 5px 10px; border-radius: 4px; cursor: pointer; margin-left: 10px; }
        .copy-btn-main:hover { background: #0b7dda; }
        .info-grid { display: grid; grid-template-columns: 100px 1fr; gap: 10px; margin: 10px 0; }
        .info-label { font-weight: bold; color: #555; }
        .alert { padding: 10px; margin: 10px 0; border-radius: 4px; }
        .alert.success { background: #dff0d8; color: #3c763d; }
        .url-actions { margin-top: 8px; }
    </style>
    <script>
        function copyToClipboard(text) {
            navigator.clipboard.writeText(text).then(function() {
                alert('URL copied to clipboard!');
            }, function(err) {
                console.error('Could not copy text: ', err);
            });
        }
    </script>
</head>
<body>
    <div class="header">
        <h1>URL Manager</h1>
        <div>
            <a href="?refresh_all" class="refresh-btn" onclick="return confirm('Refresh all cached files now?')">Refresh All Cache</a>
            <a href="?logout" class="logout">Logout</a>
        </div>
    </div>
    
    {$refreshMessage}
    
    <div class="url-form">
        <form method="post">
            <input type="url" name="new_url" class="url-input" placeholder="Enter URL to add" required>
            <input type="submit" value="Add URL" class="submit-btn">
        </form>
    </div>
    
    <h2>Managed URLs</h2>
    <ul class="url-list">
HTML;

    foreach ($urls as $hash => $url) {
        $cacheFile = CACHE_DIR . $hash . '.tmp';
        // 根据是否启用伪静态设置不同的URL格式
        if (USE_REWRITE) {
            $downloadUrl = "$baseUrl/url/" . urlencode($url);
        } else {
            $downloadUrl = "$baseUrl/index.php?url=" . urlencode($url);
        }
        $cacheStatus = file_exists($cacheFile) ? 
            '<span class="cache-info">(cached: ' . date('Y-m-d H:i:s', filemtime($cacheFile)) . ')</span>' : 
            '<span class="cache-info">(not cached)</span>';
        
        echo <<<HTML
        <li class="url-item">
            <div>
                <a href="?url={$url}" target="_blank">{$url}</a>
                {$cacheStatus}
            </div>
            <div class="url-actions">
                <a href="{$downloadUrl}" target="_blank">Download</a>
                <a href="#" class="copy-btn" onclick="copyToClipboard('{$downloadUrl}'); return false;">Copy Download Link</a>
                <a href="?delete={$hash}" class="delete-btn" onclick="return confirm('Are you sure you want to delete this URL?')">Delete</a>
            </div>
        </li>
HTML;
    }

    echo <<<HTML
    </ul>
    
    <div class="cron-section">
        <h2>Cron Job Information</h2>
        
        <div class="info-grid">
            <div class="info-label">Scheme:</div>
            <div>{$scheme}</div>
            
            <div class="info-label">Host:</div>
            <div>{$host}</div>
            
            <div class="info-label">Port:</div>
            <div>{$port}</div>
            
            <div class="info-label">Path:</div>
            <div>{$path}</div>
        </div>
        
        <h3>Cron Job URL:</h3>
        <div class="cron-url" id="cronUrl">{$fullCronUrl}</div>
        <button class="copy-btn-main" onclick="copyToClipboard('{$fullCronUrl}')">Copy URL</button>
        
        <p style="margin-top: 10px; font-size: 0.9em;">
            Use this URL to set up a cron job that will periodically check and update cached files.
            Example cron command (runs every day at 3am):<br>
            <code>0 3 * * * curl -s "{$fullCronUrl}" >/dev/null 2>&1</code>
        </p>
    </div>
</body>
</html>
HTML;
}
?>