使用PHP的CURL模拟POST采集开了viewstate的asp.net网页数据
用.NET做的网站如果做成POST提交方式,且开了viewstate的话，采集起来有点小繁琐,在此跟大家分享一下做法。采的难点是必須先取得表單裏面的viewstate和datavalidtion兩個字段的值，並模擬POST給服務器，才能取到後面頁面的數據。由於回傳數據比較大，不能用默認的form/url-encode方法傳，要用傳文件的那個表單模式。主要代碼如下：
1 /**
2 QQ群:223494678
3 函数:模拟post得到所有分页的页面信息
4 参数:
5 string $EVENTARGUMENT
6 string $VIEWSTATE
7 string $EVENTVALIDATION
8 string $EVENTTARGET
9 返回:
10 string
11 /**/
12 function getn($EVENTARGUMENT = "", $VIEWSTATE = "", $EVENTVALIDATION = "", $EVENTTARGET = "pager"){
13 $args = array();
14 if($EVENTARGUMENT){
15 $args = array(
16 '__EVENTTARGET'=>$EVENTTARGET,
17 '__EVENTARGUMENT'=>$EVENTARGUMENT,
18 '__VIEWSTATE'=>$VIEWSTATE,
19 '__EVENTVALIDATION'=>$EVENTVALIDATION,
20 '__VIEWSTATEENCRYPTED'=>'',
21 'search$txtFundName='=>'',
22 'search$txtFundManger'=>'',
23 'search$ddlFoundationDateOperater'=>'1',
24 'search$txtFoundationDate'=>'',
25 'search$dltFundType$ctl01$chkFundType'=>'on',
26 'search$dltFundType$ctl01$chklFundChildType$0'=>'on',
27 'search$dltFundType$ctl01$chklFundChildType$1'=>'on',
28 'search$dltFundType$ctl01$chklFundChildType$2'=>'on',
29 'search$dltFundType$ctl01$chklFundChildType$3'=>'on',
30 'search$dltFundType$ctl01$chklFundChildType$4'=>'on',
31 'search$chklFundStatus$0'=>'on',
32 'search$ddlFundOrg'=>'0',
33 'search$txtFundOrgName'=>'',
34 'search$ddlStatisticDateOperater'=>'1',
35 'search$txtStatisticDate'=>'',
36 'search$radlStatisticMode'=>'1'
37 );
38 }
39
40 $user_agent = "Mozilla/5.0 (Windows NT 5.1) AppleWebKit/535.11 (KHTML, like Gecko) Chrome/17.0.963.79 Safari/535.11";
41
42 $ch = curl_init();
43 curl_setopt($ch, CURLOPT_URL, 'http://???/default.aspx');
44 curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);// 设为TRUE让结果不要直接输出
45 curl_setopt($ch, CURLOPT_VERBOSE, TRUE);
46 curl_setopt($ch, CURLOPT_AUTOREFERER, TRUE);
47 curl_setopt($ch, CURLOPT_FAILONERROR, TRUE);
48 curl_setopt($ch, CURLOPT_FOLLOWLOCATION, TRUE);
49 curl_setopt($ch, CURLOPT_HEADER, TRUE);
50 curl_setopt($ch, CURLINFO_HEADER_OUT, TRUE);
51
52 curl_setopt($ch, CURLOPT_HTTPHEADER, array(
53 'Accept:text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8',
54 'Accept-Language:zh-CN,zh;q=0.8',
55 'Connection: Keep-Alive',
56 'Cache-Control:max-age=0',
57 'Referer:http://???/default.aspx',
58 'Expect:'
59 ));
60
61 curl_setopt($ch, CURLOPT_POST, true); //启用POST提交
62 curl_setopt($ch, CURLOPT_POSTFIELDS, $args); //设置POST提交的字符串
63 curl_setopt($ch, CURLOPT_USERAGENT, $user_agent);//HTTP请求User-Agent:头
64
65 $document = curl_exec($ch); //执行预定义的CURL
66 return $document;
67 }
68
69 /**
70 QQ群:223494678
71 函数:根据模拟post所得的页面信息，提取所需post的数据和分页，最后分解需要的html
72 返回:
73 string
74 /**/
75 function getHtml(){
76 global $html;
77 $first = getn();
78 preg_match('/<font color="black"><b>(\d+?)<\/b><\/font> 页<\/span>/is', $first, $matches);
79 $total = $matches;
80 preg_match('/<table id="dltData".+?<!-- AspNetPager/is', $first, $matches);
81 $html .= str_replace('<!-- AspNetPager', '', $matches);
82 $VIEWSTATE = "";
83 $EVENTVALIDATION = "";
84 preg_match('/<input type="hidden" name="__VIEWSTATE" id="__VIEWSTATE" value="(.+?)"/is', $first, $matches);
85 $VIEWSTATE = $matches;
86 preg_match('/<input type="hidden" name="__EVENTVALIDATION" id="__EVENTVALIDATION" value="(.+?)"/is', $first, $matches);
87 $EVENTVALIDATION = $matches;
88 for($i = 2; $i <= $total; $i++){
89 sleep(1);
90 $EVENTARGUMENT = $i;
91 $result = getn($EVENTARGUMENT, $VIEWSTATE, $EVENTVALIDATION);
92 preg_match('/<table id="dltData".+?<!-- AspNetPager/is', $result, $matches);
93 $html .= str_replace('<!-- AspNetPager', '', $matches);
94 $VIEWSTATE = "";
95 $EVENTVALIDATION = "";
96 preg_match('/<input type="hidden" name="__VIEWSTATE" id="__VIEWSTATE" value="(.+?)"/is', $result, $matches);
97 $VIEWSTATE = $matches;
98 preg_match('/<input type="hidden" name="__EVENTVALIDATION" id="__EVENTVALIDATION" value="(.+?)"/is', $result, $matches);
99 $EVENTVALIDATION = $matches;
100 }
101 return $html;
102 }
getHtml是採集入口文件，裏面先取每一頁的數據，並提取頁碼等數據，然後循環採集後面的數據，getn是採集函數，主要是CURL模擬POST了
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