curl爬教务系统的数据解决思路

curl爬教务系统的数据
你好各位又来请教大家了，我现在又遇到这样的情况
代码是这样子的


header ( "content-Type: text/html; charset=utf-8" );
require_once 'search.php';
// 第一步:提交数据,生成cookie,将cookie保存在临时目录下
$cookiejar = realpath ( 'cookie.txt' );
$id=$_GET['id'];
$password=$_GET['password'];
$year=$_GET['year'];
$term=$_GET['term'];
$ch = curl_init ();
$login_url = "http://211.67.32.51/default3.aspx";
$curlPost = "__VIEWSTATE=dDw5NTI3MzM0NTQ7dDw7bDxpPDE%2BO2k8NT47PjtsPHQ8O2w8aTw4PjtpPDExPjs%2BO2w8dDxwPDtwPGw8b25jbGljazs%2BO2w8d2luZG93LmNsb3NlKClcOzs%2BPj47Oz47dDxwPGw8VmlzaWJsZTs%2BO2w8bzxmPjs%2BPjs7Pjs%2BPjt0PHA8bDxWaXNpYmxlOz47bDxvPGY%2BOz4%2BOzs%2BOz4%2BO2w8aW1nREw7aW1nVEM7aW1nUU1NOz4%2BiyfPvg3FujyU8xX773LO%2FCbCuTw%3D&tbYHM=K061141026&tbPSW=100311&ddlSF=学生&imgDL.x=40&imgDL.y=7";
$curlPost = iconv("UTF-8", "GBK", $curlPost);
curl_setopt ( $ch, CURLOPT_URL, $login_url );
// 启用时会将头文件的信息作为数据流输出
curl_setopt ( $ch, CURLOPT_PROXY, 'jackdowosn.gnway.net:81');
curl_setopt ( $ch, CURLOPT_HEADER, 0 );
curl_setopt($ch, CURLOPT_USERAGENT, "Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.8.1.1) Gecko/20061204 Firefox/4");
curl_setopt($ch,CURLOPT_FOLLOWLOCATION,true);
curl_setopt ( $ch, CURLOPT_RETURNTRANSFER, 1 );
curl_setopt ( $ch, CURLOPT_REFERER, 'http://211.67.32.51/' );
curl_setopt ( $ch, CURLOPT_POST, 1 );
curl_setopt ( $ch, CURLOPT_POSTFIELDS, $curlPost );
// 设置连接结束后保存cookie信息的文件
curl_setopt ( $ch, CURLOPT_COOKIEJAR, $cookiejar );
$data=curl_exec ( $ch );
//$data = mb_convert_encoding ( $data, "utf-8", "GBK" );
//echo ''.$data.'';
$curlPost = "xh=K061141026";
$curlPost = iconv("UTF-8", "GBK", $curlPost);
curl_setopt ( $ch, CURLOPT_URL, "http://211.67.32.51/xscj.aspx?xh=K061141026" );
// 启用时会将头文件的信息作为数据流输出
curl_setopt ( $ch, CURLOPT_PROXY, 'jackdowosn.gnway.net:81');
curl_setopt ( $ch, CURLOPT_HEADER, 0 );
curl_setopt($ch, CURLOPT_USERAGENT, "Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.8.1.1) Gecko/20061204 Firefox/4");
curl_setopt($ch,CURLOPT_FOLLOWLOCATION,true);
curl_setopt ( $ch, CURLOPT_RETURNTRANSFER, 1 );
curl_setopt ( $ch, CURLOPT_REFERER, 'http://211.67.32.51/' );
curl_setopt ( $ch, CURLOPT_POST, 0 );
curl_setopt ( $ch, CURLOPT_POSTFIELDS, $curlPost );
// 设置连接结束后保存cookie信息的文件
curl_setopt ( $ch, CURLOPT_COOKIEFILE, $cookiejar );
$data=curl_exec ( $ch );
$data = mb_convert_encoding ( $data, "utf-8", "GBK" );
preg_match_all ( '/\/i', $data, $matches );
//上面的模式修正符不能加s
//file_put_contents("d://value.txt",$matches[1][0]);
//echo var_dump($matches[1][0])."





";
//echo $matches[1][0];
//echo ''.$data.'';
echo search3($id,$year, $term,$ch,$matches[1][0]);
?>


function search3($id,$year, $term, $ch,$value){
//$data=file_get_contents("d://value.txt");
curl_setopt ( $ch, CURLOPT_PROXY, 'jackdowosn.gnway.net:81');
$curlPost = "xh=K061141026&__VIEWSTATE=$value&Button2=按学年学期查询&ddlKCLX=必修&xn=2012-2013&xq=1";
$curlPost = iconv("UTF-8", "GBK", $curlPost);
curl_setopt ( $ch, CURLOPT_USERAGENT, "Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.8.1.1) Gecko/20061204 Firefox/4");
curl_setopt ( $ch, CURLOPT_FOLLOWLOCATION,true);
curl_setopt ( $ch, CURLOPT_URL, "http://211.67.32.51/xscj.aspx" );
curl_setopt ( $ch, CURLOPT_HEADER, 0);
curl_setopt ( $ch, CURLOPT_RETURNTRANSFER, 1 );
curl_setopt ( $ch, CURLOPT_POST, 1 );
curl_setopt ( $ch, CURLOPT_REFERER, "http://211.67.32.51/xscj.aspx?xh=K061141026" );
curl_setopt ( $ch, CURLOPT_POSTFIELDS, $curlPost );
curl_setopt ( $ch, CURLOPT_COOKIEFILE, $cookiejar ); // 要回传cookie
$data = curl_exec ( $ch );
curl_close ( $ch );
$data = mb_convert_encoding ( $data, "utf-8", "GBK" );
/*preg_match_all ( '/\\s*\(.*?)\<\/td\>\s*\(.*?)\<\/td\>/is', $data, $matches );
foreach ( $matches [1] as $key => $val )
$nav =$nav ."\n". $val . "---" . $matches [2] [$key];*/
return $data;
}


以上程序执行到search3时出现了，其他的都可正常返回数据。我问过一个前辈，他的回答是“我也不清楚喔。我有印象我们做正方系统遇到这种问题有可能是参数传错了，有可能是编码错了，也有可能没设置Referer这个参数”。请大家帮我看下问题出在哪里，有兴趣的可以帮我调试下，代理服务器都是真实可用的。下面是几个post参数和头信息