683 lines
22 KiB
PHP
683 lines
22 KiB
PHP
<?php
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namespace app\Service;
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use GuzzleHttp\Client;
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use GuzzleHttp\Exception\GuzzleException;
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use QL\QueryList;
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use support\Redis;
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/**
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* 二手车数据抓取服务
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* 支持从懂车帝、汽车之家等网站抓取车辆信息
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*/
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class UsedCarCrawlService
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{
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private Client $httpClient;
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// 默认请求头
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private const DEFAULT_HEADERS = [
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'User-Agent' => 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/120.0.0.0 Safari/537.36',
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'Accept-Language' => 'zh-CN,zh;q=0.9',
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'Referer' => 'https://www.dongchedi.com/',
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];
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public function __construct()
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{
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$this->httpClient = new Client([
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'verify' => false,
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'timeout' => 15,
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]);
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}
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/**
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* 选择抓取方式并执行
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*
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* @param string $url 车辆详情页URL
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* @return array 抓取结果
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* @throws \Exception
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*/
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public function crawlByUrl(string $url): array
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{
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// 根据URL判断来源并选择抓取方法
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if (str_contains($url, 'dongchedi.com')) {
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// 懂车帝PC端
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return $this->crawlDongchedi($url);
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} elseif (str_contains($url, 'dcdapp.com')) {
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// 懂车帝移动端 - 需要先转换为PC端
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$pcUrl = $this->getDongchediPcUrl($url);
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if (!$pcUrl) {
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throw new \Exception('无法获取懂车帝PC端链接');
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}
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return $this->crawlDongchedi($pcUrl);
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} elseif (str_contains($url, 't.zijieimg.com')) {
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// 懂车帝分享短链
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$finalUrl = $this->getFinalUrl($url);
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$pcUrl = $this->getDongchediPcUrl($finalUrl);
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if (!$pcUrl) {
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throw new \Exception('无法获取懂车帝PC端链接');
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}
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return $this->crawlDongchedi($pcUrl);
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} elseif (str_contains($url, 'che168.com')) {
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// 汽车之家
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return $this->crawlChe168($url);
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}
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throw new \Exception('暂不支持此网站的数据抓取');
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}
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/**
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* 获取短链的最终URL
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*/
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private function getFinalUrl(string $url): string
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{
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try {
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$response = $this->httpClient->get($url, [
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'allow_redirects' => ['track_redirects' => true],
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]);
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$history = $response->getHeader('X-Guzzle-Redirect-History');
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return end($history) ?: $url;
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} catch (\Exception $e) {
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throw new \Exception('获取短链失败: ' . $e->getMessage());
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}
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}
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/**
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* 从懂车帝移动端URL获取PC端URL
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*/
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private function getDongchediPcUrl(string $url): ?string
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{
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$query = parse_url($url, PHP_URL_QUERY);
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if (!$query) {
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return null;
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}
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parse_str($query, $params);
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$skuId = $params['sku_id'] ?? null;
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return $skuId ? 'https://www.dongchedi.com/usedcar/' . $skuId : null;
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}
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/**
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* 抓取懂车帝二手车信息
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*/
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private function crawlDongchedi(string $url): array
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{
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try {
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$html = $this->fetchHtml($url);
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if (str_contains($html, '404 Not Found')) {
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throw new \Exception('车辆已下架或找不到页面');
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}
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return $this->parseDongchediHtml($html, $url);
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} catch (\Exception $e) {
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throw new \Exception('抓取懂车帝数据失败: ' . $e->getMessage());
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}
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}
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/**
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* 抓取汽车之家二手车信息
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*/
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private function crawlChe168(string $url): array
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{
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try {
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// 处理不同格式的汽车之家URL
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if (str_contains($url, 'home?infoid=')) {
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// PC端链接转换
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$queryString = parse_url($url, PHP_URL_QUERY);
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parse_str($queryString, $params);
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$carId = $params['infoid'] ?? null;
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$url = 'https://www.che168.com/dealer/111/' . $carId . '.html?pvareaid=0';
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} elseif (str_contains($url, 'wap.che168.com/dealer')) {
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// 移动端链接转换
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$url = $this->getChe168PcUrl($url);
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}
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$html = $this->fetchHtml($url);
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return $this->parseChe168Html($html, $url);
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} catch (\Exception $e) {
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throw new \Exception('抓取汽车之家数据失败: ' . $e->getMessage());
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}
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}
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/**
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* 从汽车之家移动端URL获取PC端URL
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*/
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private function getChe168PcUrl(string $url): string
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{
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$path = parse_url($url, PHP_URL_PATH);
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$parts = explode('/', $path);
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$filename = end($parts);
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$carId = pathinfo($filename, PATHINFO_FILENAME);
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return 'https://www.che168.com/dealer/111/' . $carId . '.html?pvareaid=0';
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}
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/**
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* 获取网页HTML内容
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*/
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private function fetchHtml(string $url): string
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{
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try {
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$response = $this->httpClient->get($url, [
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'headers' => self::DEFAULT_HEADERS,
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]);
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return (string)$response->getBody();
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} catch (GuzzleException $e) {
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throw new \Exception('获取页面失败: ' . $e->getMessage());
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}
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}
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/**
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* 解析懂车帝HTML
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*/
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private function parseDongchediHtml(string $html, string $url): array
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{
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try {
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$ql = QueryList::html($html);
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// 提取JSON数据
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$jsonText = $ql->find('#__NEXT_DATA__')->text();
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if (empty($jsonText)) {
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throw new \Exception('无法找到页面数据');
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}
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$jsonData = json_decode($jsonText, true);
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if (!$jsonData) {
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throw new \Exception('解析JSON数据失败');
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}
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$skuDetail = $jsonData['props']['pageProps']['skuDetail'] ?? [];
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$carInfo = $skuDetail['car_info'] ?? [];
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// 提取价格（懂车帝使用特殊字符编码）
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$priceText = $ql->find('.head-info_price-wrap__Y4bxi > p')->text();
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$price = $this->decodeDongchediPrice($priceText);
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// 提取车辆信息
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$title = $carInfo['car_name'] ?? '';
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$brandName = $carInfo['brand_name'] ?? '';
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$seriesName = $carInfo['series_name'] ?? '';
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$year = $carInfo['year'] ?? '';
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$bodyColor = $carInfo['body_color'] ?? '';
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// 提取配置信息
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$overview = $skuDetail['car_config_overview'] ?? [];
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$power = $overview['power']['horsepower'] ?? '';
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$displacement = $overview['power']['capacity'] ?? '';
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// 提取上牌时间和车源地
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$otherParams = $skuDetail['other_params'] ?? [];
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$plateTime = $this->getParamValue($otherParams, '上牌时间');
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$sourcePlace = $this->getParamValue($otherParams, '车源地');
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// 提取里程
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$importantText = $skuDetail['important_text'] ?? '';
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$mileage = 0;
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if (preg_match('/(\d+\.?\d*)\s*万公里/', $importantText, $matches)) {
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$mileage = (int)($matches[1] * 10000);
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}
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// 提取图片
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$images = $skuDetail['head_images'] ?? [];
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// 提取车况介绍
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$conditionDesc = '';
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if (preg_match('/车况介绍\s*(.*?)\s*推荐理由/s', $html, $matches)) {
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$conditionDesc = trim($matches[1]);
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}
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// 提取车辆ID
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$carId = $carInfo['car_id'] ?? 0;
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$brandId = $carInfo['brand_id'] ?? 0;
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$seriesId = $carInfo['series_id'] ?? 0;
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$usedCarId = $this->extractIdFromUrl($url);
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return [
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'title' => $title,
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'price' => $price,
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'brand_name' => $brandName,
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'brand_id' => $brandId,
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'series_name' => $seriesName,
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'series_id' => $seriesId,
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'year' => $year,
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'car_id' => $carId,
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'used_car_id' => $usedCarId,
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'power' => $power,
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'displacement' => $displacement,
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'plate_time' => $plateTime,
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'source_place' => $sourcePlace,
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'body_color' => $bodyColor,
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'mileage' => $mileage,
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'images' => $images,
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'condition_desc' => $conditionDesc,
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'source_url' => $url,
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];
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} catch (\Exception $e) {
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throw new \Exception('解析懂车帝页面失败: ' . $e->getMessage());
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}
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}
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/**
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* 解析汽车之家HTML
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*/
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private function parseChe168Html(string $html, string $url): array
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{
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try {
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// 汽车之家使用 GB2312 编码，需要转换
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$html = $this->convertToUtf8($html);
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$ql = QueryList::html($html);
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// 提取车辆名称
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$productName = $ql->find('div.car-box .car-brand-name')->text();
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// 提取价格
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$price = $ql->find('div.goodstartmoney')->text();
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if (empty($price)) {
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$price = $ql->find('span#overlayPrice')->text();
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}
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$price = str_replace(['¥', '￥', '万'], '', $price);
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$price = is_numeric($price) ? (int)($price * 10000) : 0;
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// 提取基本信息
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$basicInfo = [];
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$ql->find('div#nav1 ul.basic-item-ul li')->each(function($li) use (&$basicInfo) {
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$field = trim($li->find('.item-name')->text());
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$value = trim(str_replace($field, '', $li->text()));
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$fieldMap = [
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'上牌时间' => 'plate_time',
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'表显里程' => 'mileage_text',
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'排 量' => 'displacement',
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'所 在 地' => 'source_place',
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'车身颜色' => 'body_color',
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'车况介绍' => 'condition_desc',
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];
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if (isset($fieldMap[$field])) {
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$basicInfo[$fieldMap[$field]] = $value;
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}
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});
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// 处理里程
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$mileage = 0;
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if (isset($basicInfo['mileage_text'])) {
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$mileage = (int)str_replace('万公里', '', $basicInfo['mileage_text']) * 10000;
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}
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// 提取面包屑导航获取品牌和车系
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$breadcrumbs = [];
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$ql->find('.bread-crumbs a')->each(function($a) use (&$breadcrumbs) {
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$breadcrumbs[] = trim($a->text());
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});
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$brandName = $breadcrumbs[3] ?? '';
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$seriesName = $breadcrumbs[4] ?? '';
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$brandName = str_replace('二手', '', $brandName);
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$seriesName = str_replace('二手', '', $seriesName);
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// 提取年份
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$year = '';
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if (preg_match('/(\d{4})款/', $productName, $matches)) {
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$year = $matches[1];
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}
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// 提取图片
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$images = [];
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$ql->find('.swiper-container2 .swiper-slide .jiaodianphotoclick img')->each(function($img) use (&$images) {
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$src = $img->attr('src');
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if ($src && !str_contains($src, 'default-che168')) {
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$images[] = $src;
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}
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});
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// 提取车辆ID
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$usedCarId = $this->extractIdFromUrl($url);
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return [
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'title' => $productName,
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'product_name' => $productName,
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'price' => $price,
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'brand_name' => $brandName,
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'brand_id' => 0,
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'series_name' => $seriesName,
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'series_id' => 0,
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'year' => $year,
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'car_id' => 0,
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'used_car_id' => $usedCarId,
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'plate_time' => $basicInfo['plate_time'] ?? '',
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'displacement' => $basicInfo['displacement'] ?? '',
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'source_place' => $basicInfo['source_place'] ?? '',
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'body_color' => $basicInfo['body_color'] ?? '',
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'mileage' => $mileage,
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'images' => $images,
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'condition_desc' => $basicInfo['condition_desc'] ?? '',
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'source_url' => $url,
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];
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} catch (\Exception $e) {
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throw new \Exception('解析汽车之家页面失败: ' . $e->getMessage());
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}
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}
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/**
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* 解码懂车帝价格（特殊字符编码）
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*/
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private function decodeDongchediPrice(string $str): float
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{
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$map = [
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"\u{E53D}" => '1',
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"\u{E3F0}" => '2',
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"\u{E422}" => '3',
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"\u{E42C}" => '4',
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"\u{E49C}" => '5',
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"\u{E42B}" => '6',
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"\u{E4FE}" => '7',
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"\u{E548}" => '8',
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"\u{E4C8}" => '9',
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"\u{E453}" => '0',
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"\u{E45F}" => '.',
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];
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$priceStr = strtr($str, $map);
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$priceStr = str_replace('万', '', $priceStr);
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return (float)trim($priceStr);
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}
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/**
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* 从URL中提取ID
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*/
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private function extractIdFromUrl(string $url): int
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{
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if (preg_match('/(\d+)\.html?$/', $url, $matches)) {
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return (int)$matches[1];
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}
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if (preg_match('/\/usedcar\/(\d+)/', $url, $matches)) {
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return (int)$matches[1];
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}
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return 0;
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}
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/**
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* 从参数列表中获取指定名称的值
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*/
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private function getParamValue(array $params, string $name): ?string
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{
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foreach ($params as $item) {
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if (($item['name'] ?? null) === $name) {
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return $item['value'] ?? null;
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}
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}
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return null;
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}
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/**
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* 将GB2312编码转换为UTF-8
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*/
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private function convertToUtf8(string $html): string
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{
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if (!function_exists('mb_convert_encoding')) {
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return $html;
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}
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$isGb = stripos($html, 'charset=gb2312') !== false || stripos($html, 'charset=gbk') !== false;
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if (!$isGb) {
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return $html;
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}
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$out = @mb_convert_encoding($html, 'UTF-8', 'GB2312');
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if ($out === false || $out === '') {
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$out = @mb_convert_encoding($html, 'UTF-8', 'GBK');
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}
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if ($out !== false && $out !== '') {
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$html = preg_replace('/charset\s*=\s*["\']?gb(2312|k)["\']?/i', 'charset="utf-8"', $html);
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return $out;
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}
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return $html;
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}
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/**
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* 下载图片到本地
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*
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* @param string $url 图片URL
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* @param string $saveDir 保存目录
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* @return string|null 保存的文件路径，失败返回null
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*/
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public function downloadImage(string $url, string $saveDir): ?string
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{
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try {
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if (!is_dir($saveDir)) {
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mkdir($saveDir, 0755, true);
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}
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$filename = md5($url) . '.jpg';
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$savePath = rtrim($saveDir, '/') . '/' . $filename;
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// 如果文件已存在，直接返回
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if (file_exists($savePath)) {
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return $savePath;
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}
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// 使用 curl 下载图片
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$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_CONNECTTIMEOUT => 5,
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CURLOPT_TIMEOUT => 15,
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CURLOPT_SSL_VERIFYPEER => false,
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CURLOPT_SSL_VERIFYHOST => false,
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CURLOPT_HTTPHEADER => [
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'User-Agent: ' . self::DEFAULT_HEADERS['User-Agent'],
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'Referer: ' . self::DEFAULT_HEADERS['Referer'],
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],
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]);
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$data = curl_exec($ch);
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$httpCode = curl_getinfo($ch, CURLINFO_HTTP_CODE);
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curl_close($ch);
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if ($httpCode !== 200 || $data === false) {
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return null;
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}
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file_put_contents($savePath, $data);
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return $savePath;
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} catch (\Exception $e) {
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error_log('下载图片失败: ' . $e->getMessage());
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return null;
|
||
}
|
||
}
|
||
|
||
/**
|
||
* 批量下载图片
|
||
*
|
||
* @param array $urls 图片URL数组
|
||
* @param string $saveDir 保存目录
|
||
* @return array [url => localPath]
|
||
*/
|
||
public function downloadImages(array $urls, string $saveDir): array
|
||
{
|
||
$result = [];
|
||
foreach ($urls as $url) {
|
||
$url = trim($url);
|
||
if (empty($url)) {
|
||
continue;
|
||
}
|
||
|
||
// 处理协议相对URL
|
||
if (str_starts_with($url, '//')) {
|
||
$url = 'https:' . $url;
|
||
}
|
||
|
||
$localPath = $this->downloadImage($url, $saveDir);
|
||
$result[$url] = $localPath;
|
||
}
|
||
|
||
return $result;
|
||
}
|
||
|
||
/**
|
||
* 通过关键词搜索懂车帝车系信息
|
||
*
|
||
* @param string $keyword 搜索关键词（如 "奥迪A4"）
|
||
* @return array 品牌和车系信息
|
||
* @throws \Exception
|
||
*/
|
||
public function searchByKeyword(string $keyword): array
|
||
{
|
||
// 访问懂车帝搜索页面获取第一个结果的链接
|
||
$searchUrl = "https://www.dongchedi.com/search?keyword=" . urlencode($keyword);
|
||
|
||
try {
|
||
$html = $this->fetchHtml($searchUrl);
|
||
$ql = QueryList::html($html);
|
||
|
||
// 查找"查看全部"按钮的链接
|
||
$href = '';
|
||
$ql->find('a.fold-btn')->each(function ($item) use (&$href) {
|
||
$itemHref = $item->attr('href');
|
||
if ($itemHref) {
|
||
$href = $itemHref;
|
||
}
|
||
});
|
||
|
||
if (empty($href)) {
|
||
throw new \Exception('未找到相关车系，请使用更精确的关键词');
|
||
}
|
||
|
||
// 提取车系ID
|
||
$seriesId = $this->extractSeriesId($href);
|
||
if (!$seriesId) {
|
||
throw new \Exception('无法解析车系ID');
|
||
}
|
||
|
||
// 获取品牌和车系信息
|
||
return $this->getBrandSeries($seriesId);
|
||
} catch (\Exception $e) {
|
||
throw new \Exception('搜索失败: ' . $e->getMessage());
|
||
}
|
||
}
|
||
|
||
/**
|
||
* 获取品牌和车系名称
|
||
*
|
||
* @param string $seriesId 车系ID
|
||
* @return array 包含品牌和车系信息的数组
|
||
* @throws \Exception
|
||
*/
|
||
public function getBrandSeries(string $seriesId): array
|
||
{
|
||
$url = "https://www.dongchedi.com/auto/series/" . $seriesId . "?anchorId=carModels";
|
||
|
||
try {
|
||
$html = $this->fetchHtml($url);
|
||
$ql = QueryList::html($html);
|
||
|
||
// 从面包屑导航中提取品牌和车系
|
||
$breadcrumbs = [];
|
||
$ql->find('div.breadcrumb_wrap__2GLeU span')->each(function ($item) use (&$breadcrumbs) {
|
||
$breadcrumbs[] = trim($item->text());
|
||
});
|
||
|
||
$brand = $breadcrumbs[2] ?? '';
|
||
$series = $breadcrumbs[3] ?? '';
|
||
|
||
// 获取车型列表
|
||
$models = $this->getSeriesModels($seriesId);
|
||
|
||
return [
|
||
'brand' => $brand,
|
||
'series' => $series,
|
||
'series_id' => $seriesId,
|
||
'models' => $models,
|
||
];
|
||
} catch (\Exception $e) {
|
||
throw new \Exception('获取车系信息失败: ' . $e->getMessage());
|
||
}
|
||
}
|
||
|
||
/**
|
||
* 获取车系下的车型列表
|
||
*
|
||
* @param string $seriesId 车系ID
|
||
* @return array 车型列表
|
||
*/
|
||
public function getSeriesModels(string $seriesId): array
|
||
{
|
||
$url = "https://www.dongchedi.com/auto/series/" . $seriesId . "?anchorId=carModels";
|
||
$models = [];
|
||
|
||
try {
|
||
$html = $this->fetchHtml($url);
|
||
$ql = QueryList::html($html);
|
||
|
||
// 使用 Tailwind CSS 类名选择器（懂车帝使用 Tailwind）
|
||
$nodes = $ql->find('div.tw-grid div.tw-relative div.tw-items-center>a');
|
||
$texts = $nodes->texts()->all();
|
||
$links = $nodes->attrs('href')->all();
|
||
|
||
// 提取价格信息（可选）
|
||
$priceNodes = $ql->find('div.tw-grid div.tw-text-color-gray-800');
|
||
$prices = $priceNodes->texts()->all();
|
||
|
||
foreach ($texts as $index => $text) {
|
||
$modelName = trim($text);
|
||
if (empty($modelName)) {
|
||
continue;
|
||
}
|
||
|
||
$link = $links[$index] ?? '';
|
||
if (!empty($link) && strpos($link, 'http') !== 0) {
|
||
$link = 'https://www.dongchedi.com' . $link;
|
||
}
|
||
|
||
$priceStr = $prices[$index] ?? '';
|
||
$msrp = 0;
|
||
if (!empty($priceStr)) {
|
||
$msrp = (int)(str_replace("万", "", $priceStr) * 10000);
|
||
}
|
||
|
||
$models[] = [
|
||
'id' => $index,
|
||
'name' => $modelName,
|
||
'url' => $link,
|
||
'msrp' => $msrp,
|
||
];
|
||
}
|
||
|
||
return $models;
|
||
} catch (\Exception $e) {
|
||
// 车型解析失败，记录日志并返回空数组
|
||
error_log('获取车型列表失败: ' . $e->getMessage());
|
||
return [];
|
||
}
|
||
}
|
||
|
||
/**
|
||
* 从懂车帝URL中提取车系ID
|
||
*
|
||
* @param string $url 懂车帝URL
|
||
* @return string|null 车系ID
|
||
*/
|
||
private function extractSeriesId(string $url): ?string
|
||
{
|
||
// 匹配 /auto/series/x123/ 格式
|
||
if (preg_match('/\/auto\/series\/(\d+)/', $url, $matches)) {
|
||
return $matches[1];
|
||
}
|
||
|
||
// 匹配 /auto/series/x123/params/ 格式
|
||
if (preg_match('/\/auto\/series\/(\d+)/', $url, $matches)) {
|
||
return $matches[1];
|
||
}
|
||
|
||
return null;
|
||
}
|
||
}
|