117 lines
3.9 KiB
PHP
117 lines
3.9 KiB
PHP
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<?php
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/**
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* 简航 SimpleNav —— 搜索联想代理
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* 浏览器直接调用各搜索引擎的联想接口会有跨域/JSONP 限制，这里由服务端代理并统一输出 JSON。
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* 用法：suggest.php?slug=bing&q=关键词
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*/
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declare(strict_types=1);
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require_once __DIR__ . '/functions.php';
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header('Content-Type: application/json; charset=utf-8');
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header('Cache-Control: no-store');
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$slug = isset($_GET['slug']) ? preg_replace('/[^a-z0-9\-_]/i', '', (string)$_GET['slug']) : '';
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$q = isset($_GET['q']) ? trim((string)$_GET['q']) : '';
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if ($q === '') {
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echo json_encode(['q' => '', 'items' => []]);
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exit;
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}
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$items = [];
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try {
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$st = db()->prepare('SELECT * FROM engines WHERE slug=? AND is_active=1 LIMIT 1');
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$st->execute([$slug]);
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$engine = $st->fetch();
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if ($engine && $engine['suggest_url'] !== '') {
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$u = str_replace('{q}', rawurlencode($q), $engine['suggest_url']);
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$resp = http_get($u, 100000, 5);
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if ($resp !== null) {
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$items = parse_suggest($engine['suggest_type'], ensure_utf8($resp['body']), $q);
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}
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}
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} catch (Throwable $e) {
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$items = [];
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}
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// 去重、限长、裁剪
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$items = array_values(array_unique(array_filter(array_map('trim', $items))));
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$items = array_slice($items, 0, 10);
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echo json_encode(['q' => $q, 'items' => $items], JSON_UNESCAPED_UNICODE);
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exit;
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/** 按引擎类型解析联想结果 */
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function parse_suggest(string $type, string $body, string $q): array
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{
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$body = trim($body);
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$out = [];
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switch ($type) {
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case 'bing_osjson':
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case 'google_firefox':
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// ["query", ["s1","s2",...]]
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$j = json_decode($body, true);
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if (is_array($j) && isset($j[1]) && is_array($j[1])) {
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$out = $j[1];
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}
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break;
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case 'baidu_sugrec':
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// {"q":"x","g":[{"type":"..","q":".."}], ...}
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$j = json_decode($body, true);
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if (is_array($j)) {
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if (!empty($j['g']) && is_array($j['g'])) {
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foreach ($j['g'] as $it) { if (isset($it['q'])) $out[] = $it['q']; }
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} elseif (!empty($j['s']) && is_array($j['s'])) {
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$out = $j['s'];
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}
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}
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break;
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case 'so360':
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// {"s":[".."]} 或 {"result":[{"word":".."}]}
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$j = json_decode($body, true);
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if (is_array($j)) {
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if (!empty($j['s']) && is_array($j['s'])) { $out = $j['s']; }
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elseif (!empty($j['result']) && is_array($j['result'])) {
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foreach ($j['result'] as $it) { if (isset($it['word'])) $out[] = $it['word']; }
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}
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}
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break;
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case 'sogou_ajaj':
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// {"query":"x","items":["a","b"]}（可能是 GBK，已在上面转码）
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$j = json_decode($body, true);
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if (is_array($j) && !empty($j['items']) && is_array($j['items'])) {
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$out = $j['items'];
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} else {
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// 兜底：正则抓引号字符串
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if (preg_match_all('#"([^"]{1,40})"#u', $body, $m)) {
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$out = array_slice($m[1], 1); // 跳过 query 自身
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}
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}
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break;
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case 'ddg':
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// [{"phrase":".."},...]
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$j = json_decode($body, true);
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if (is_array($j)) {
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foreach ($j as $it) {
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if (is_array($it) && isset($it['phrase'])) { $out[] = $it['phrase']; }
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elseif (is_string($it)) { $out[] = $it; }
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}
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}
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break;
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default:
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// 通用兜底：尝试 JSON，再退化正则
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$j = json_decode($body, true);
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if (is_array($j)) {
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if (isset($j[1]) && is_array($j[1])) { $out = $j[1]; }
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elseif (!empty($j['s']) && is_array($j['s'])) { $out = $j['s']; }
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}
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}
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return $out;
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}
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