使用PHP/cURL实现Web自动化

我想看看这本书的几页。我的尝试是下面的代码，用它我得到一个包含第一页酒店数据的xml文件，但我想访问其他酒店所在的页面。如何做到这一点

可以想象，所有页面的url都是相同的

<?php

//extract data from the post
extract($_POST);

//set POST variables
$url = 'http://www.turismovenezia.it/index.php';

$fields1 = array(
            'ajax'=>'searchEngineTopdata',
            'next_pair'=>'Dove Allogiare|*',
            'lang'=>'it');


$fields2 = array(

'ajax'=>'xmlSearchEngineResponder',
'xml' => "%3C%3Fxml%20version%3D%221.0%22%3F%3E%3CSearchRequest%20xmlns%3D%22http%3A%2F%2Fwww.liberologico.com%2Fdbsite%2Fjolly-search%22%20xmlns%3Axsi%3D%22http%3A%2F%2Fwww.w3.org%2F2001%2FXMLSchema-instance%22%3E%3CSearch%3E%3CScope%3E%3C%21%5BCDATA%5B%2A%5D%5D%3E%3C%2FScope%3E%3CFilters%3E%3CFilters%20xsi%3Atype%3D%22FilterSpecType%22%3E%3CField%3Eaptve_territorio%3C%2FField%3E%3CValue%3E%3CSingleValue%3E%3C%21%5BCDATA%5B%2A%5D%5D%3E%3C%2FSingleValue%3E%3C%2FValue%3E%3CMode%3ETHESAURUS%3C%2FMode%3E%3COperation%3ELIKE%3C%2FOperation%3E%3C%2FFilters%3E%3CFilters%20xsi%3Atype%3D%22FilterSpecType%22%3E%3CField%3Efull_text_search%3C%2FField%3E%3CValue%3E%3CSingleValue%3E%3C%21%5BCDATA%5B%2A%5D%5D%3E%3C%2FSingleValue%3E%3C%2FValue%3E%3CMode%3EFREE_TEXT%3C%2FMode%3E%3COperation%3ELIKE%3C%2FOperation%3E%3C%2FFilters%3E%3CFilters%20xsi%3Atype%3D%22FilterSpecType%22%3E%3CField%3Elang%3C%2FField%3E%3CValue%3E%3CSingleValue%3E%3C%21%5BCDATA%5Bit%5D%5D%3E%3C%2FSingleValue%3E%3C%2FValue%3E%3CMode%3EFREE_TEXT%3C%2FMode%3E%3COperation%3EEQUAL%3C%2FOperation%3E%3C%2FFilters%3E%3C%2FFilters%3E%3CSubSearches%3E%3CSearch%3E%3CScope%3E%3C%21%5BCDATA%5BEventi%5D%5D%3E%3C%2FScope%3E%3C%2FSearch%3E%3CSearch%3E%3CScope%3E%3C%21%5BCDATA%5BArte%20%26%20Cultura%5D%5D%3E%3C%2FScope%3E%3C%2FSearch%3E%3CSearch%3E%3CScope%3E%3C%21%5BCDATA%5BMare%20%26%20Natura%5D%5D%3E%3C%2FScope%3E%3C%2FSearch%3E%3CSearch%3E%3CScope%3E%3C%21%5BCDATA%5BPiatti%20%26%20Prodotti%20tipici%5D%5D%3E%3C%2FScope%3E%3C%2FSearch%3E%3CSearch%3E%3CScope%3E%3C%21%5BCDATA%5BRelax%20%26%20Divertimento%5D%5D%3E%3C%2FScope%3E%3C%2FSearch%3E%3CSearch%3E%3CScope%3E%3C%21%5BCDATA%5BDove%20Alloggiare%5D%5D%3E%3C%2FScope%3E%3C%2FSearch%3E%3CSearch%3E%3CScope%3E%3C%21%5BCDATA%5BDove%20Mangiare%5D%5D%3E%3C%2FScope%3E%3C%2FSearch%3E%3CSearch%3E%3CScope%3E%3C%21%5BCDATA%5BInformazioni%20Utili%5D%5D%3E%3C%2FScope%3E%3C%2FSearch%3E%3C%2FSubSearches%3E%3C%2FSearch%3E%3CActiveResultSet%3E%3CTab%3E%3C%21%5BCDATA%5BDove%20Alloggiare%5D%5D%3E%3C%2FTab%3E%3CFirstItem%3E0%3C%2FFirstItem%3E%3CPagerSize%3E10%3C%2FPagerSize%3E%3C%2FActiveResultSet%3E%3C%2FSearchRequest%3E",
'force' => 'false');

//open connection
$ch = curl_init();

//set the url, number of POST vars, POST data
curl_setopt($ch,CURLOPT_URL,$url);
curl_setopt($ch,CURLOPT_POST, true);
curl_setopt($ch,CURLOPT_POSTFIELDS, $fields1);
curl_setopt($ch,CURLOPT_RETURNTRANSFER,1);

//set the url, number of POST vars, POST data
curl_setopt($ch,CURLOPT_URL,$url);
curl_setopt($ch,CURLOPT_POST, true);
curl_setopt($ch,CURLOPT_POSTFIELDS, $fields2);
curl_setopt($ch,CURLOPT_RETURNTRANSFER,1);

//execute post
$result = curl_exec($ch);

echo $result;

//close connection
curl_close($ch);

---

您应该获取站点本身使用AJAX访问的URL，而不是抓取初始HTML页面本身。您可以通过使用浏览器的开发人员工具来窥探在请求另一个结果页面时发出的AJAX请求并“复制”它们，从而确切地了解应该如何构造请求

顺便说一句，这取决于为什么以及如何做，这可能不是最合乎道德或最合法的事情。
首先，你为什么要配置curl两次

//set the url, number of POST vars, POST data
curl_setopt($ch,CURLOPT_URL,$url);
curl_setopt($ch,CURLOPT_POST, true);
curl_setopt($ch,CURLOPT_POSTFIELDS, $fields1);
curl_setopt($ch,CURLOPT_RETURNTRANSFER,1);

//set the url, number of POST vars, POST data
curl_setopt($ch,CURLOPT_URL,$url);
curl_setopt($ch,CURLOPT_POST, true);
curl_setopt($ch,CURLOPT_POSTFIELDS, $fields2);
curl_setopt($ch,CURLOPT_RETURNTRANSFER,1);

然后，当您使用$fields2（长XML字符串）第一次调用first page时，调用应该返回一个XML（如您所说），并且在这个XML响应中有一个包含酒店总数的字段ItemCount

如果您查看使用$fields2发送的XML的长字符串，就会看到一个字段调用“FirstItem”，其中第一个调用包含0。此字段为偏移量，可以将其递增以跳过酒店

例如：

$fields2 = array(

'ajax'=>'xmlSearchEngineResponder',
'xml' => "%3C%3Fxml%20version%3D%221.0%22%3F%3E%3CSearchRequest%20xmlns%3D%22http%3A%2F%2Fwww.liberologico.com%2Fdbsite%2Fjolly-search%22%20xmlns%3Axsi%3D%22http%3A%2F%2Fwww.w3.org%2F2001%2FXMLSchema-instance%22%3E%3CSearch%3E%3CScope%3E%3C%21%5BCDATA%5B%2A%5D%5D%3E%3C%2FScope%3E%3CFilters%3E%3CFilters%20xsi%3Atype%3D%22FilterSpecType%22%3E%3CField%3Eaptve_territorio%3C%2FField%3E%3CValue%3E%3CSingleValue%3E%3C%21%5BCDATA%5B%2A%5D%5D%3E%3C%2FSingleValue%3E%3C%2FValue%3E%3CMode%3ETHESAURUS%3C%2FMode%3E%3COperation%3ELIKE%3C%2FOperation%3E%3C%2FFilters%3E%3CFilters%20xsi%3Atype%3D%22FilterSpecType%22%3E%3CField%3Efull_text_search%3C%2FField%3E%3CValue%3E%3CSingleValue%3E%3C%21%5BCDATA%5B%2A%5D%5D%3E%3C%2FSingleValue%3E%3C%2FValue%3E%3CMode%3EFREE_TEXT%3C%2FMode%3E%3COperation%3ELIKE%3C%2FOperation%3E%3C%2FFilters%3E%3CFilters%20xsi%3Atype%3D%22FilterSpecType%22%3E%3CField%3Elang%3C%2FField%3E%3CValue%3E%3CSingleValue%3E%3C%21%5BCDATA%5Bit%5D%5D%3E%3C%2FSingleValue%3E%3C%2FValue%3E%3CMode%3EFREE_TEXT%3C%2FMode%3E%3COperation%3EEQUAL%3C%2FOperation%3E%3C%2FFilters%3E%3C%2FFilters%3E%3CSubSearches%3E%3CSearch%3E%3CScope%3E%3C%21%5BCDATA%5BEventi%5D%5D%3E%3C%2FScope%3E%3C%2FSearch%3E%3CSearch%3E%3CScope%3E%3C%21%5BCDATA%5BArte%20%26%20Cultura%5D%5D%3E%3C%2FScope%3E%3C%2FSearch%3E%3CSearch%3E%3CScope%3E%3C%21%5BCDATA%5BMare%20%26%20Natura%5D%5D%3E%3C%2FScope%3E%3C%2FSearch%3E%3CSearch%3E%3CScope%3E%3C%21%5BCDATA%5BPiatti%20%26%20Prodotti%20tipici%5D%5D%3E%3C%2FScope%3E%3C%2FSearch%3E%3CSearch%3E%3CScope%3E%3C%21%5BCDATA%5BRelax%20%26%20Divertimento%5D%5D%3E%3C%2FScope%3E%3C%2FSearch%3E%3CSearch%3E%3CScope%3E%3C%21%5BCDATA%5BDove%20Alloggiare%5D%5D%3E%3C%2FScope%3E%3C%2FSearch%3E%3CSearch%3E%3CScope%3E%3C%21%5BCDATA%5BDove%20Mangiare%5D%5D%3E%3C%2FScope%3E%3C%2FSearch%3E%3CSearch%3E%3CScope%3E%3C%21%5BCDATA%5BInformazioni%20Utili%5D%5D%3E%3C%2FScope%3E%3C%2FSearch%3E%3C%2FSubSearches%3E%3C%2FSearch%3E%3CActiveResultSet%3E%3CTab%3E%3C%21%5BCDATA%5BDove%20Alloggiare%5D%5D%3E%3C%2FTab%3E%3CFirstItem%3E0%3C%2FFirstItem%3E%3CPagerSize%3E10%3C%2FPagerSize%3E%3C%2FActiveResultSet%3E%3C%2FSearchRequest%3E",
'force' => 'false');

返回前10个结果

$fields2 = array(
'ajax'=>'xmlSearchEngineResponder',
'xml' => "%3C%3Fxml%20version%3D%221.0%22%3F%3E%3CSearchRequest%20xmlns%3D%22http%3A%2F%2Fwww.liberologico.com%2Fdbsite%2Fjolly-search%22%20xmlns%3Axsi%3D%22http%3A%2F%2Fwww.w3.org%2F2001%2FXMLSchema-instance%22%3E%3CSearch%3E%3CScope%3E%3C%21%5BCDATA%5B%2A%5D%5D%3E%3C%2FScope%3E%3CFilters%3E%3CFilters%20xsi%3Atype%3D%22FilterSpecType%22%3E%3CField%3Eaptve_territorio%3C%2FField%3E%3CValue%3E%3CSingleValue%3E%3C%21%5BCDATA%5B%2A%5D%5D%3E%3C%2FSingleValue%3E%3C%2FValue%3E%3CMode%3ETHESAURUS%3C%2FMode%3E%3COperation%3ELIKE%3C%2FOperation%3E%3C%2FFilters%3E%3CFilters%20xsi%3Atype%3D%22FilterSpecType%22%3E%3CField%3Efull_text_search%3C%2FField%3E%3CValue%3E%3CSingleValue%3E%3C%21%5BCDATA%5B%2A%5D%5D%3E%3C%2FSingleValue%3E%3C%2FValue%3E%3CMode%3EFREE_TEXT%3C%2FMode%3E%3COperation%3ELIKE%3C%2FOperation%3E%3C%2FFilters%3E%3CFilters%20xsi%3Atype%3D%22FilterSpecType%22%3E%3CField%3Elang%3C%2FField%3E%3CValue%3E%3CSingleValue%3E%3C%21%5BCDATA%5Bit%5D%5D%3E%3C%2FSingleValue%3E%3C%2FValue%3E%3CMode%3EFREE_TEXT%3C%2FMode%3E%3COperation%3EEQUAL%3C%2FOperation%3E%3C%2FFilters%3E%3C%2FFilters%3E%3CSubSearches%3E%3CSearch%3E%3CScope%3E%3C%21%5BCDATA%5BEventi%5D%5D%3E%3C%2FScope%3E%3C%2FSearch%3E%3CSearch%3E%3CScope%3E%3C%21%5BCDATA%5BArte%20%26%20Cultura%5D%5D%3E%3C%2FScope%3E%3C%2FSearch%3E%3CSearch%3E%3CScope%3E%3C%21%5BCDATA%5BMare%20%26%20Natura%5D%5D%3E%3C%2FScope%3E%3C%2FSearch%3E%3CSearch%3E%3CScope%3E%3C%21%5BCDATA%5BPiatti%20%26%20Prodotti%20tipici%5D%5D%3E%3C%2FScope%3E%3C%2FSearch%3E%3CSearch%3E%3CScope%3E%3C%21%5BCDATA%5BRelax%20%26%20Divertimento%5D%5D%3E%3C%2FScope%3E%3C%2FSearch%3E%3CSearch%3E%3CScope%3E%3C%21%5BCDATA%5BDove%20Alloggiare%5D%5D%3E%3C%2FScope%3E%3C%2FSearch%3E%3CSearch%3E%3CScope%3E%3C%21%5BCDATA%5BDove%20Mangiare%5D%5D%3E%3C%2FScope%3E%3C%2FSearch%3E%3CSearch%3E%3CScope%3E%3C%21%5BCDATA%5BInformazioni%20Utili%5D%5D%3E%3C%2FScope%3E%3C%2FSearch%3E%3C%2FSubSearches%3E%3C%2FSearch%3E%3CActiveResultSet%3E%3CTab%3E%3C%21%5BCDATA%5BDove%20Alloggiare%5D%5D%3E%3C%2FTab%3E%3CFirstItem%3E10%3C%2FFirstItem%3E%3CPagerSize%3E10%3C%2FPagerSize%3E%3C%2FActiveResultSet%3E%3C%2FSearchRequest%3E",
'force' => 'false');

将返回您接下来的10个结果。还有一个字段调用PagerSize thant，它允许您一次检索更多结果

所以我会先打电话得到酒店的总数，然后循环得到所有其他页面

//do first curl call

//then
$totalHotel = 5214; // To retrieve in the first call
$increment = 10; // the number of hotel to treat at once
$nbOfHotelimported = $increment;
while($totalHotel-$increment){
 // do another curl call
 // with FirstItem set to $nbOfHotelimported
 // and pageSizer set to $increment

 $nbOfHotelimported += $increment;
}

可能重复的问题请不要重复您自己的问题。