如何编写页面关键字抓取components.arrow.com站点代码

本篇内容介绍了“如何编写页面关键字抓取components.arrow.com站点代码”的有关知识，在实际案例的操作过程中，不少人都会遇到这样的困境，接下来就让小编带领大家学习一下如何处理这些情况吧！希望大家仔细阅读，能够学有所成！

复制代码 代码如下:

<?php
 /**
 * HOST: components.arrow.com
 */
 //set_time_limit(0);
 // base function
 function curl_get($url, $data = array(), $header = array(), $timeout = 15, $port = 80, $reffer = '', $proxy = '')
 {
 $ch = curl_init();
 if (!empty($data)) {
 $data = is_array($data)?http_build_query($data): $data;
 $url .= (strpos($url,'?')? '&': "?") . $data;
 }
 curl_setopt($ch, CURLOPT_URL, $url);
 curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
 curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, $timeout);
 curl_setopt($ch, CURLOPT_POST, 0);
 curl_setopt($ch, CURLOPT_PORT, $port);
 curl_setopt($ch, CURLOPT_HTTPHEADER, $header);
 curl_setopt($ch, CURLOPT_FOLLOWLOCATION, 1); //是否抓取跳转后的页面
 $reffer && curl_setopt($ch, CURLOPT_REFERER, $reffer);
 if($proxy) {
 curl_setopt($ch, CURLOPT_PROXY, $proxy);
 curl_setopt($ch, CURLOPT_PROXYPORT, 1723);
 curl_setopt($ch, CURLOPT_PROXYUSERPWD,"andhm001:andhm123");
 }

$result = array();
 $result['result'] = curl_exec($ch);
 if (0 != curl_errno($ch)) {
 $result['error'] = "Error:\n" . curl_error($ch);

}
 curl_close($ch);
 return $result;
 }

复制代码 代码如下:

function curl_post($url, $data = array(), $header = array(), $timeout = 15, $port = 80)
 {
 $ch = curl_init();
 curl_setopt($ch, CURLOPT_URL, $url);
 curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
 curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, $timeout);
 curl_setopt($ch, CURLOPT_PORT, $port);
 !empty ($header) && curl_setopt($ch, CURLOPT_HTTPHEADER, $header);
 curl_setopt($ch, CURLOPT_POST, 1);
 curl_setopt($ch, CURLOPT_POSTFIELDS, $data);

$result = array();
 $result['result'] = curl_exec($ch);
 if (0 != curl_errno($ch)) {
 $result['error'] = "Error:\n" . curl_error($ch);

}
 curl_close($ch);

return $result;
 }

/**
 * 获取列表页的html源码
 * @param string $keywords 搜索关键字
 * @param int $start 开始记录数
 * @return boolean|array
 */
 function getListHtml($keywords, $start = 0)
 {
 if ($start < 0)
 {
 return false;
 }

$postData = array(
 'search_token' => $keywords,
 'start' => $start,
 'limit' => 100,
 );

$result = curl_post('http://components.arrow.com/part/search/' . $keywords, http_build_query($postData));
 if ( isset($result['error']) )
 {
 return false;
 //exit($result['error']);
 }
 $result = $result['result'];

return $result;
 }

/**
 * 获取列表页 连接href
 * @param string $html html源码
 * @return array
 */
 function getListHref($html)
 {
 $pattern = '/<td\s+class="col_mfr_part_num"><a\s+href="(.[^>]+)">/isU';
 if (preg_match_all($pattern, $html, $matches))
 {
 return $matches[1];
 } else {
 // 没有匹配项
 return array();
 }
 }

/**
 * 获取下一页数字start
 * @param string $html html源码
 * @return number
 */
 function getListNextPage($html)
 {
 $pattern = '/<script\s+language="javascript">buildPagination\(\'\d+\',\'\d+\',\'(\d+)\',\d+\);<\/script>/isU';
 if (preg_match($pattern, $html, $matches))
 {
 return intval($matches[1]);
 } else {
 return -1;
 }
 }

/**
 * 获取列表也所有的详细列表
 * @param string $keywords 搜索关键字
 * @return boolean|array
 */
 function getListHrefAll($keywords)
 {
 if (empty($keywords))
 {
 return false;
 }

$html = getListHtml($keywords);
 $hrefList = getListHref($html);
 if (empty($hrefList))
 {
 // 没有结果
 return array();
 }
 $nextPage = getListNextPage($html);
 $loop =0;
 while ($nextPage > 0)
 {
 $html = getListHtml($keywords, $nextPage);
 $tmpHrefList = getListHref($html);
 $hrefList = array_merge($hrefList, $tmpHrefList);
 $nextPage = getListNextPage($html);
 $loop ++;
 }
 return $hrefList;
 }

/**
 * 获取详情页信息
 * @param string $url url地址
 * @return array()
 */
 function getDetail($url)
 {
 if ( empty($url) )
 {
 return false;
 }
 $host = 'http://components.arrow.com';

$url = $host . $url;
 $result = curl_get($url);
 if ( isset($result['error']) )
 {
 return array();
 //exit($result['error']);
 }
 $html = $result['result'];

$result = array(
 'sup_part' => '', // 供应商型
 'sup_id' => '', // 供应商ID
 'mfg_part' => '', // 制造商型号
 'mfg_name' => '', // 制造商名称
 'cat_name' => '', // 分类名称
 'para' => '', // 属性
 'desc' => '', // 描述
 'pdf_url' => '', // PDF地址
 'sup_stock' => '', // 库存
 'min_purch' => '', // 最小订购量
 'price' => '', // 价格
 'img_url' => '', // 图片地址
 'createtime' => '', // 创建时间
 'datacode' => '', // 批号
 'package' => '', // 封装
 'page_url' => '', // 页面地址
 );

// mfg_part
 $pattern = '/<li>[\s\n]*<strong>Part No:\s*<\/strong>(.+)<\/li>/isU';
 if (preg_match($pattern, $html, $matches))
 {
 $result['mfg_part'] = trim($matches[1]);
 } else {file_put_contents('page.txt', $html);die('xxx');
 return array();
 }

// mfg_name
 $pattern = '/<li>[\s\n]*<strong>Manufacturer: <\/strong>(.+)<\/li>/isU';
 if (preg_match($pattern, $html, $matches))
 {
 $result['mfg_name'] = trim($matches[1]);
 }

// cat_name
 $pattern = '/displayCategory\(\'(.[^\']+)\'\);/isU';
 if (preg_match($pattern, $html, $matches))
 {
 $result['cat_name'] = trim($matches[1]);
 $result['cat_name'] = str_replace('|', '>', $result['cat_name']);
 }

// para
 $tablepattern = '/<table\s+id="part_specs".[^>]*>(.+)<\/table>/isU';
 if (preg_match($tablepattern, $html, $matches))
 {
 $pattern = '/<tr>[\s\n]*<td><strong>(.+)<\/strong><\/td><td>(.+)<\/td>[\s\n]*<\/tr>/isU';
 if (preg_match_all($pattern, $matches[1], $matches))
 {
 foreach($matches[1] as $k=>$v)
 {
 $v = trim($v);
 if ('Package Type' == $v)
 {
 $result['package'] = trim($matches[2][$k]);
 continue;
 }
 $result['para'][$v] = trim($matches[2][$k]);
 }
 }
 }

// desc
 $pattern = '/<div\s+id="part_title">.+<h5>(.+)<\/h5>[\s\n]*<\/div>/isU';
 if (preg_match($pattern, $html, $matches))
 {
 $result['desc'] = trim($matches[1]);
 }

// pdf_url
 $pattern = '/<li\s+class="datasheet">[\s\n]*<strong>Datasheet:<\/strong><a\s+href="(.[^"]+)"/isU';
 if (preg_match($pattern, $html, $matches))
 {
 $result['pdf_url'] = $host . trim($matches[1]);
 }

// sup_stock
 $pattern = '/<td\s+id="inv_1"\s+class="li_inv">([\d,]+)<\/td>/isU';
 if (preg_match($pattern, $html, $matches))
 {
 $result['sup_stock'] = trim($matches[1]);
 $result['sup_stock'] = str_replace(',', '', $result['sup_stock']);
 }

// min_purch
 $pattern = '/<span\s+id="multiples">[\s\n]*<strong>Multiple:\s*<\/strong>(.+)<\/span>/isU';
 if (preg_match($pattern, $html, $matches))
 {
 $result['min_purch'] = trim($matches[1]);
 }

// price
 $pattern = '/<div\s+id="price_1"\s+class="li_price">(.[^<]+)<\/div>/isU';
 if (preg_match($pattern, $html, $matches))
 {
 $result['price'][1] = trim($matches[1]);
 }
 $pattern = '/<div\s+id="price_1"\s+class="li_price">[\s\n]*<span.[^>]+title="(.[^"]+)">/isU';
 if (preg_match($pattern, $html, $matches))
 {
 $priceurl = str_replace('&amp;', '&', $matches[1]);
 $json = curl_get($priceurl);
 $json = $json['result'];
 if (! empty($json))
 {
 $jsonresult = json_decode($json, true);
 foreach ($jsonresult['parts'][0]['webprice']['resale'] as $k=>$v)
 {
 $result['price'][$v['minqty']] = $v['price'];
 }
 }
 }

// img_url
 $pattern = '/<div\s+id="part_image">[\s\n]*<img\s+src="(.[^"]+)"/isU';
 if (preg_match($pattern, $html, $matches))
 {
 $result['img_url'] = trim($matches[1]);
 }

// page_url
 $result['page_url'] = $url;

return $result;
 }

/**
 * 最终调用函数
 * @param string $keywords 搜索关键字
 * @return array
 */
 function getData($keywords)
 {
 $hrefList = getListHrefAll($keywords);
 $result = array();

foreach ($hrefList as $k=>$v)
 {
 $result[] = getDetail($v);
 }

return $result;
 }

// Test Script
 $keywords = trim($_GET['keywords']);
 $result = getData($keywords);

print_r($result);

“如何编写页面关键字抓取components.arrow.com站点代码”的内容就介绍到这里了，感谢大家的阅读。如果想了解更多行业相关的知识可以关注亿速云网站，小编将为大家输出更多高质量的实用文章！