使用Curl PHP模拟ajax调用

Question

我正在使用curl（通过PHP）抓取一个网站，我想要的一些信息是产品列表，默认情况下仅显示前几个产品。其余的将在用户单击按钮以获取产品的完整列表时传递给用户，从而触发ajax调用以返回该列表。

简而言之，这是他们使用的JS：

headers['__RequestVerificationToken'] = token;
$.ajax({
type: "post",
url: "/ajax/getProductList",
dataType: 'html',
data: JSON.stringify({ historyPageIndex: 1, displayPeriod: 0, productsType: All }),
contentType: 'application/json; charset=utf-8',
success: function (result) {
    $(target).html("");
    $(target).html(result);
},
beforeSend: function (XMLHttpRequest) {
    if (headers['__RequestVerificationToken']) {
        XMLHttpRequest.setRequestHeader("__RequestVerificationToken", headers['__RequestVerificationToken']);
    }
}
});

这是我的PHP脚本：

curl_setopt($ch, CURLOPT_USERAGENT, $userAgent);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_FOLLOWLOCATION, true);
curl_setopt($ch, CURLOPT_MAXREDIRS, 10);
curl_setopt($ch, CURLOPT_COOKIEFILE, $cookieLocation);
curl_setopt($ch, CURLOPT_COOKIEJAR, $cookieLocation);
curl_setopt($ch, CURLOPT_POST, false);
curl_setopt($ch, CURLOPT_URL, 'https://www.domain.com/Applications/ViewProducts');
curl_setopt($ch, CURLOPT_REFERER, 'https://www.domain.com/');
$webpage = curl_exec($ch);
$productsType = trim(find_by_pattren($webpage, '<input id="productsType" name="productsType" type="hidden" value="(.*?)"'));
$token = trim(find_by_pattren($webpage, '<input name="__RequestVerificationToken" type="hidden" value="(.*?)"'));

$postVariables = 'productsType='.$productsType.
'&historyPageIndex=1
&displayPeriod=0
&__RequestVerificationToken='.$token;
curl_setopt($ch, CURLOPT_POST, true);
curl_setopt($ch, CURLOPT_POSTFIELDS, $postVariables);
curl_setopt($ch, CURLOPT_URL, 'https://www.domain.com/ajax/getProductList');
curl_setopt($ch, CURLOPT_REFERER, 'https://www.domain.com/Applications/ViewProducts');
$webpage = curl_exec($ch);

这将在该站点上产生一个错误页面。我认为主要原因可能是：

• 他们检查这是否是ajax请求（不知道如何解决）

• 令牌必须在标题中，而不在post变量中

任何想法？

编辑：这是工作代码：

curl_setopt($ch, CURLOPT_USERAGENT, $userAgent);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_FOLLOWLOCATION, true);
curl_setopt($ch, CURLOPT_MAXREDIRS, 10);
curl_setopt($ch, CURLOPT_COOKIEFILE, $cookieLocation);
curl_setopt($ch, CURLOPT_COOKIEJAR, $cookieLocation);
curl_setopt($ch, CURLOPT_URL, 'https://www.domain.com/Applications/ViewProducts');
curl_setopt($ch, CURLOPT_REFERER, 'https://www.domain.com/');
$webpage = curl_exec($ch);
$productsType = trim(find_by_pattren($webpage, '<input id="productsType" name="productsType" type="hidden" value="(.*?)"'));
$token = trim(find_by_pattren($webpage, '<input name="__RequestVerificationToken" type="hidden" value="(.*?)"'));

$postVariables = json_encode(array('productsType' => $productsType,
'historyPageIndex' => 1,
'displayPeriod' => 0));
curl_setopt($ch, CURLOPT_POST, true);
curl_setopt($ch, CURLOPT_HTTPHEADER, array("X-Requested-With: XMLHttpRequest", "Content-Type: application/json; charset=utf-8", "__RequestVerificationToken: $token"));
curl_setopt($ch, CURLOPT_POSTFIELDS, $postVariables);
curl_setopt($ch, CURLOPT_URL, 'https://www.domain.com/ajax/getProductList');
curl_setopt($ch, CURLOPT_REFERER, 'https://www.domain.com/Applications/ViewProducts');
$webpage = curl_exec($ch);

Answer 1

要将请求验证令牌设置为标头，更紧密地模仿AJAX请求，并将content-type设置为JSON，请使用CURLOPT_HEADER。

curl_setopt($ch, CURLOPT_HTTPHEADER, array("X-Requested-With: XMLHttpRequest", "Content-Type: application/json; charset=utf-8", "__RequestVerificationToken: $token"));

我还注意到，您在代码的第7行上多余地将CURLOPT_POST设置为false，并且您发送的帖子数据不是JSON格式。你应该有：

$postVariables = '{"historyPageIndex":1,"displayPeriod":0,"productsType":"All"}';