抓取“IC 交易网”供应商程序

/** 
* 抓取“IC 交易网”供应商主程序 
* author Lee.
* Last modify $Date: 2012-2-6 10:44:32$ 
* 注：本程序按照编码 GB2312 执行，因为“IC 交易网”网站是GB2312编码，数据库也得保持一致
*/ 
class ic { 
    private $key; // 型号  
    private $pageNum; // 页码  
 
    /**
     * 入口程序
     */ 
    public function go($key) { 
        $this->key = $key; 
        $this->pageNum = $this->getPageNum(); 
        $this->getInfo(); 
    } 
 
    /**
     * 获取供应商 url 链接数组
     * @return ArrayObject
     */ 
    private function getInfo() { 
        if ($this->pageNum==1) { # 处理只有一页的情况 
            $arr = $this->shopUrlMatchReArr($this->getContent()); 
            $this->isAddSuccess($arr); 
        } elseif ($this->pageNum>1) { # 多页 
            for ($i=1; $ipageNum; $i++) { 
                $arr = $this->shopUrlMatchReArr($this->getContent($i)); 
                $this->isAddSuccess($arr); 
            } 
        }    
    } 
     
    /**
     * 打印是否添加成功
     * @param ArrayObject $arr
     * @return string
     */ 
    private function isAddSuccess($arr) { 
        foreach ($arr as $k=>$v) { 
            if ($this->execAdd($this->getInfoByShopUrl($v))) { 
                echo 'Add Success!!'; 
            } else { 
                echo 'Add Faild!!'; 
            } 
        } 
    } 
 
    /**
     * 执行添加到数据库
     * @param ArrayObject $infoArr
     * @return Number 受影响的行数
     */ 
    private function execAdd($infoArr) { 
        $mysqli = $this->getDb(); 
        if (!emptyempty($infoArr['company'])) { 
            if (!$this->isExists($mysqli, $infoArr)) { 
                $num = $mysqli->query("INSERT INTO ic(company,address,phone,mobile,fax,zip,person,qq,msn,email,website,regDate,shopUrl) VALUES ('{$infoArr['company']}','{$infoArr['address']}','{$infoArr['phone']}','{$infoArr['mobile']}','{$infoArr['fax']}','{$infoArr['zip']}','{$infoArr['person']}','{$infoArr['qq']}','{$infoArr['msn']}','{$infoArr['email']}','{$infoArr['website']}','{$infoArr['regDate']}','{$infoArr['shopUrl']}')"); 
                return $num; 
            } else { 
                return false; # 表示数据已经存在 
            } 
        } else { 
            return false; 
        } 
    } 
 
    /**
     * 连接数据库
     */ 
    private function getDb() { 
        $mysqli = new mysqli('localhost', 'root', '1715544', 'weiku'); 
        $mysqli->query('SET NAMES GB2312'); 
        return $mysqli; 
    } 
 
    /**
     * 检查公司是否已经存在
     * @param Resource $mysqli
     * @param ArrayObject $infoArr
     * @return bool
     */ 
    private function isExists($mysqli, $infoArr) { 
        $mysqli->query("SELECT company FROM ic WHERE company = '{$infoArr['company']}'"); 
        if ($mysqli->affected_rows) { 
            return true; 
        } else { 
            return false; 
        } 
    } 
 
    /**
     * 格式化字符串
     * @param string $str 
     * @return string
     */ 
    private function formatString($str) { 
        return trim($str); 
    } 
 
    /**
     * 抓取信息
     * @param $url 
     * @return ArrayObject
     */ 
    private function getInfoByShopUrl($url) { 
        $re = $this->getUrlInfo($url); 
        if (stristr($re, '')) $re = preg_replace('/.*/Usi', '', $re); 
        preg_match_all('/

 /**
  * 入口程序
  */
 public function go($key) {
  $this->key = $key;
  $this->pageNum = $this->getPageNum();
  $this->getInfo();
 }

 /**
  * 获取供应商 url 链接数组
  * @return ArrayObject
  */
 private function getInfo() {
  if ($this->pageNum==1) { # 处理只有一页的情况
   $arr = $this->shopUrlMatchReArr($this->getContent());
   $this->isAddSuccess($arr);
  } elseif ($this->pageNum>1) { # 多页
   for ($i=1; $ipageNum; $i++) {
    $arr = $this->shopUrlMatchReArr($this->getContent($i));
    $this->isAddSuccess($arr);
   }
  } 
 }
 
 /**
  * 打印是否添加成功
  * @param ArrayObject $arr
  * @return string
  */
 private function isAddSuccess($arr) {
  foreach ($arr as $k=>$v) {
   if ($this->execAdd($this->getInfoByShopUrl($v))) {
    echo 'Add Success!!';
   } else {
    echo 'Add Faild!!';
   }
  }
 }

 /**
  * 执行添加到数据库
  * @param ArrayObject $infoArr
  * @return Number 受影响的行数
  */
 private function execAdd($infoArr) {
  $mysqli = $this->getDb();
  if (!empty($infoArr['company'])) {
   if (!$this->isExists($mysqli, $infoArr)) {
    $num = $mysqli->query("INSERT INTO ic(company,address,phone,mobile,fax,zip,person,qq,msn,email,website,regDate,shopUrl) VALUES ('{$infoArr['company']}','{$infoArr['address']}','{$infoArr['phone']}','{$infoArr['mobile']}','{$infoArr['fax']}','{$infoArr['zip']}','{$infoArr['person']}','{$infoArr['qq']}','{$infoArr['msn']}','{$infoArr['email']}','{$infoArr['website']}','{$infoArr['regDate']}','{$infoArr['shopUrl']}')");
    return $num;
   } else {
    return false; # 表示数据已经存在
   }
  } else {
   return false;
  }
 }

 /**
  * 连接数据库
  */
 private function getDb() {
  $mysqli = new mysqli('localhost', 'root', '1715544', 'weiku');
  $mysqli->query('SET NAMES GB2312');
  return $mysqli;
 }

 /**
  * 检查公司是否已经存在
  * @param Resource $mysqli
  * @param ArrayObject $infoArr
  * @return bool
  */
 private function isExists($mysqli, $infoArr) {
  $mysqli->query("SELECT company FROM ic WHERE company = '{$infoArr['company']}'");
  if ($mysqli->affected_rows) {
   return true;
  } else {
   return false;
  }
 }

 /**
  * 格式化字符串
  * @param string $str
  * @return string
  */
 private function formatString($str) {
  return trim($str);
 }

 /**
  * 抓取信息
  * @param $url
  * @return ArrayObject
  */
 private function getInfoByShopUrl($url) {
  $re = $this->getUrlInfo($url);
  if (stristr($re, '')) $re = preg_replace('/.*/Usi', '', $re);
  preg_match_all('/

 /**
  * 根据页面获取供应商 url 数组
  * @param string $re
  * @return ArrayObject
  */
 private function shopUrlMatchReArr($re) {
  preg_match_all('/.+/Usi', $re, $arr);
  $arr = $this->formatUrlArr(array_unique($arr[1]));
  return $arr;
 }
 
 /**
  * 格式化数组
  * @param Array $arr
  * @return ArrayObject
  */
 private function formatUrlArr($arr) {
  $newArr = array();
  foreach ($arr as $key=>$value) {
   if ($this->isExistsHttp($value)) {
    $newArr[$key] = $value;
   }
  }
  return $newArr;
 }
 
 /**
  * 格式化 QQ
  * @param string $str
  * @return string
  */
 private function formatQqMsn($str, $e='QQ') {
  if (empty($str)) return '';
  preg_match_all('/alt="'.$e.'\:(.+)"/Usi', $str, $arr);
  if (count($arr[1])==1) return $arr[1][0];
  $newStr = null;
  foreach ($arr[1] as $value) {
   $newStr .= $value . ' ';
  }
  return rtrim($newStr, ' ');
 }

 /**
  * 去掉网址的 A 标签
  * @param string $site
  * @return string
  */
 private function stripATags($site) {
  $site = preg_replace('/(.+)/', '\1', $site);
  return $site;
 }

 /**
  * 检查 url 是否有 http
  * @param string $url
  * @return bool
  */
 private function isExistsHttp($url) {
  if (stristr($url, 'http://')) {
   return true;
  } else {
   return false;
  }
 }
 
 /**
  * 获取页面内容
  * @param Number $page
  * @return string
  */
 private function getContent($page=1) {
  $re = file_get_contents($this->getUrl($this->key, $page));
  return $re;
 }
 
 /**
  * 获取页码
  * @return Number
  */
 private function getPageNum() {
  $i = null;
  $re = $this->getContent();
  preg_match_all('/共(.+)页/Usi', $re, $arr);
  $i = $arr[1][0];
  return $i;
 }

 /**
  * 获取 URL 链接
  * @param string $str
  * @param int $page 页码
  * @return string
  */
 private function getUrl($str, $page=1) {
  return "http://www.ic.net.cn/partsearch/searchinstock.asp?newtype=1&area=&Page={$page}&partnumber={$str}&mfg=&DateCode=&QTY=&PRICE=&Exact=&orderby=inputdate&qty_filter=50&usertype2=1&pack=";
 }

 /**
  * 获取页面内容
  * @param string $url
  * @return string
  */
 private function getUrlInfo($url) {
  $re = file_get_contents($url);
  return $re;
 }
}

/*
程序运行思路：根据“IC 交易网”的IC搜索功能，输入型号进行搜索，然后抓取供应商信息

数据库结构
CREATE TABLE `ic` (
 `id` mediumint(8) unsigned NOT NULL auto_increment,
 `company` varchar(500) NOT NULL,
 `address` varchar(500) default NULL,
 `phone` varchar(500) default NULL,
 `mobile` varchar(500) default NULL,
 `fax` varchar(300) default NULL,
 `zip` varchar(300) default NULL,
 `person` varchar(500) default NULL,
 `qq` varchar(300) default NULL,
 `msn` varchar(300) default NULL,
 `email` varchar(500) default NULL,
 `website` varchar(300) default NULL,
 `regDate` varchar(500) default NULL,
 PRIMARY KEY  (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=gb2312
*/

$i = new ic();
$arr = array_unique(array('MAX3232', 'AML8613', 'MT6225A', 'OM8373PS/N3/A', 'PT7313', 'MAX8212ESA', 'TL431', 'S3C2440', 'TMS320F2812PGFA', 'PCM1704', 'AN6717', 'CA3162E', 'CA3161E', 'LM393N', 'DS18B20', 'SHT10', 'AML8613', 'AN6717', 'LM393N', 'CA3161E', 'CA3162E', 'PCM1704', 'STK392-040', 'K1667', 'MAX232', 'STM32F103', 'LM358'));
foreach ($arr as $v) {
 $i->go($v);
}
?>

摘自 Lee.的专栏