使用 Curl PHP 模拟 ajax 调用

Question

我正在使用 curl（通过 PHP）抓取网站，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。其余部分在用户单击按钮以获取完整的产品列表时传递给用户，这会触发 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);

这会在网站上生成一个错误页面。我认为主要原因可能是：

• 他们检查是否是 ajax 请求（不知道如何解决）

• 令牌需要在标头中，而不是在帖子变量中

有什么想法吗？

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，更接近地模仿 AJAX 请求，并将内容类型设置为 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 行将 CURLOPT_POST 设置为 false 是多余的，并且您发送的发布数据不是 JSON 格式。你应该有：

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