laoyang
6e83cc3ecc
- 前台：搜索引擎切换+联想下拉、网格板块（常用/工具）、合集标签页 - 后台：初始化/登录、网站/板块/引擎增删改、上下移排序 - 添加网站自动抓取名称与图标（存储于服务器），支持自定义简称 - 一键全部更新（批量刷新图标+名称，保留自定义简称） - 搜索联想服务端代理（必应/百度/谷歌/搜狗/360/DuckDuckGo） - 零依赖：原生 CSS/JS，PDO SQLite
238 lines
7.8 KiB
PHP
238 lines
7.8 KiB
PHP
<?php
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/**
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* 简航 SimpleNav —— 公共函数
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*/
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declare(strict_types=1);
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require_once __DIR__ . '/config.php';
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require_once __DIR__ . '/db.php';
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/** HTML 转义 */
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function e(?string $s): string
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{
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return htmlspecialchars((string)$s, ENT_QUOTES | ENT_SUBSTITUTE, 'UTF-8');
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}
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/** 规范化 URL：补协议、去空白 */
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function norm_url(string $url): string
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{
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$url = trim($url);
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if ($url === '') {
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return '';
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}
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if (!preg_match('#^https?://#i', $url)) {
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$url = 'http://' . $url;
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}
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return $url;
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}
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/** 取主域名（用于 favicon 与文件名） */
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function domain_of(string $url): string
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{
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$host = parse_url(norm_url($url), PHP_URL_HOST);
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return $host ? preg_replace('/^www\./i', '', $host) : '';
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}
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/** curl 抓取文本（带 UA、超时、跟随跳转、限长） */
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function http_get(string $url, int $maxBytes = 300000, int $timeout = 8): ?array
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{
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if (!function_exists('curl_init')) {
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// 兜底：allow_url_fopen
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$ctx = stream_context_create(['http' => [
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'timeout' => $timeout,
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'header' => "User-Agent: Mozilla/5.0 SimpleNav\r\n",
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'follow_location' => 1,
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]]);
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$body = @file_get_contents($url, false, $ctx, 0, $maxBytes);
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if ($body === false) {
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return null;
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}
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return ['body' => $body, 'url' => $url, 'type' => ''];
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}
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$ch = curl_init($url);
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curl_setopt_array($ch, [
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CURLOPT_RETURNTRANSFER => true,
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CURLOPT_FOLLOWLOCATION => true,
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CURLOPT_MAXREDIRS => 5,
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CURLOPT_TIMEOUT => $timeout,
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CURLOPT_CONNECTTIMEOUT => 5,
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CURLOPT_USERAGENT => 'Mozilla/5.0 (compatible; SimpleNav/1.0)',
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CURLOPT_SSL_VERIFYPEER => false,
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CURLOPT_SSL_VERIFYHOST => 0,
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CURLOPT_ENCODING => '',
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]);
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$body = curl_exec($ch);
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$type = (string)curl_getinfo($ch, CURLINFO_CONTENT_TYPE);
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$eff = (string)curl_getinfo($ch, CURLINFO_EFFECTIVE_URL);
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$err = curl_errno($ch);
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curl_close($ch);
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if ($err || $body === false) {
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return null;
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}
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return ['body' => $body, 'url' => $eff ?: $url, 'type' => $type];
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}
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/**
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* 抓取网站元信息：标题、名称、图标地址。
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* @return array{title:string,name:string,icon:string,final_url:string}
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*/
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function fetch_site_meta(string $url): array
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{
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$url = norm_url($url);
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$out = ['title' => '', 'name' => '', 'icon' => '', 'final_url' => $url];
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$resp = http_get($url);
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if ($resp === null) {
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return $out;
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}
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$html = $resp['body'];
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$final = $resp['url'];
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$out['final_url'] = $final;
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// 编码：优先按 <meta charset> 转换到 UTF-8
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$html = ensure_utf8($html);
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// <title>
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if (preg_match('#<title[^>]*>(.*?)</title>#is', $html, $m)) {
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$out['title'] = trim(preg_replace('/\s+/', ' ', html_entity_decode($m[1], ENT_QUOTES, 'UTF-8')));
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}
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// og:site_name 优先作为"名称"
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if (preg_match('#<meta[^>]+property=["\']og:site_name["\'][^>]+content=["\']([^"\']+)#i', $html, $m)) {
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$out['name'] = trim(html_entity_decode($m[1], ENT_QUOTES, 'UTF-8'));
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} elseif ($out['title'] !== '') {
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// 用标题的首段（按分隔符切分）作为名称
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$t = preg_split('#[\|\-_—·:：]#u', $out['title']);
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$out['name'] = trim($t[0]);
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}
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// 图标：<link rel="...icon...">
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$icon = '';
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if (preg_match_all('#<link[^>]+>#i', $html, $links)) {
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foreach ($links[0] as $tag) {
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if (preg_match('#rel=["\'][^"\']*icon[^"\']*["\']#i', $tag)) {
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if (preg_match('#href=["\']([^"\']+)["\']#i', $tag, $hm)) {
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$cand = html_entity_decode($hm[1], ENT_QUOTES, 'UTF-8');
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// 优先 apple-touch-icon（通常更大更清晰）
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if (stripos($tag, 'apple-touch') !== false) {
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$icon = $cand;
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break;
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}
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if ($icon === '') {
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$icon = $cand;
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}
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}
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}
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}
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}
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if ($icon !== '') {
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$out['icon'] = absolutize($icon, $final);
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} else {
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$p = parse_url($final);
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if (!empty($p['scheme']) && !empty($p['host'])) {
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$out['icon'] = $p['scheme'] . '://' . $p['host'] . '/favicon.ico';
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}
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}
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return $out;
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}
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/** 把可能为相对路径的 URL 补全为绝对 URL */
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function absolutize(string $href, string $base): string
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{
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if (preg_match('#^https?://#i', $href)) {
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return $href;
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}
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$p = parse_url($base);
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$root = ($p['scheme'] ?? 'http') . '://' . ($p['host'] ?? '');
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if (strpos($href, '//') === 0) {
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return ($p['scheme'] ?? 'http') . ':' . $href;
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}
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if (strpos($href, '/') === 0) {
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return $root . $href;
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}
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$dir = rtrim(dirname($p['path'] ?? '/'), '/');
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return $root . $dir . '/' . $href;
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}
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/** 简单编码归一：识别 GBK/GB18030 并转 UTF-8 */
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function ensure_utf8(string $s): string
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{
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if (preg_match('#<meta[^>]+charset=["\']?\s*(gbk|gb2312|gb18030)#i', $s)) {
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if (function_exists('mb_convert_encoding')) {
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return mb_convert_encoding($s, 'UTF-8', 'GB18030');
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}
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}
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if (function_exists('mb_check_encoding') && !mb_check_encoding($s, 'UTF-8')) {
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return mb_convert_encoding($s, 'UTF-8', 'GB18030');
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}
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return $s;
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}
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/**
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* 下载图标并保存到本地（PNG，64x64，透明背景）。
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* @return string 本地文件名（如 ab12cd.png），失败返回 ''
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*/
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function download_icon(string $iconUrl, string $key, int $size = 64): string
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{
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if ($iconUrl === '') {
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return '';
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}
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if (!is_dir(ICON_PATH)) {
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@mkdir(ICON_PATH, 0755, true);
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}
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$resp = http_get($iconUrl, 500000, 8);
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if ($resp === null || $resp['body'] === '') {
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return '';
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}
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$bin = $resp['body'];
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$name = md5($key) . '.png';
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$dest = ICON_PATH . '/' . $name;
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// 用 GD 统一转成 PNG（顺带裁成正方形、缩放）
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if (function_exists('imagecreatefromstring')) {
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$im = @imagecreatefromstring($bin);
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if ($im !== false) {
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$w = imagesx($im);
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$h = imagesy($im);
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$side = min($w, $h);
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$square = imagecreatetruecolor($size, $size);
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imagealphablending($square, false);
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imagesavealpha($square, true);
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$trans = imagecolorallocatealpha($square, 0, 0, 0, 127);
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imagefill($square, 0, 0, $trans);
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$sx = (int)(($w - $side) / 2);
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$sy = (int)(($h - $side) / 2);
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imagecopyresampled($square, $im, 0, 0, $sx, $sy, $size, $size, $side, $side);
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imagepng($square, $dest);
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imagedestroy($square);
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imagedestroy($im);
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return $name;
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}
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}
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// 无 GD：原样保存（按 content-type 猜扩展名）
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$ext = 'ico';
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if (stripos($resp['type'], 'png') !== false) {
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$ext = 'png';
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} elseif (stripos($resp['type'], 'svg') !== false) {
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$ext = 'svg';
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} elseif (stripos($resp['type'], 'jpeg') !== false || stripos($resp['type'], 'jpg') !== false) {
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$ext = 'jpg';
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} elseif (stripos($resp['type'], 'gif') !== false) {
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$ext = 'gif';
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}
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$name = md5($key) . '.' . $ext;
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@file_put_contents(ICON_PATH . '/' . $name, $bin);
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return is_file(ICON_PATH . '/' . $name) ? $name : '';
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}
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/** 图标显示地址（为空时返回 ''，前端回退到首字母块） */
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function icon_src(string $file): string
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{
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return $file === '' ? '' : url(ICON_URL . '/' . $file);
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}
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/** 名称首字配色（无图标时的回退头像底色） */
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function letter_color(string $s): string
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{
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$palette = ['#2F6BF7', '#5B8DEF', '#0EA5E9', '#10B981', '#F59E0B', '#EF4444', '#8B5CF6', '#EC4899', '#14B8A6', '#F97316'];
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return $palette[abs(crc32($s)) % count($palette)];
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}
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