HTTP 错误 411，请求必须分块或具有内容长度

我正在尝试登录到远程网站，但在以下代码“HTTP错误411，请求必须分块或具有内容长度”时收到错误。

$username = "psker";
$password = "Admin123";
$url="https://192.18.11.33/Login.aspx?FromMasterLogin=true"; 
$postinfo = 'txtUserName='.$username.'&txtpassword='.$password.'&txtUserName_ClientState={"enabled":true,"emptyMessage":""}&txtpassword_ClientState={"enabled":true,"emptyMessage":""}&btnLogin_ClientState&btnClearSession_ClientState&rdwindowForget_ClientState&rdwindowEnforce_ClientState&rdWindowPublicNewsAlerts_ClientState&RadWindowManager1_ClientState';
$cookie_file_path = "/cookies.txt";
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, $url);
$headers = array( 
            "Accept:text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8",
            "Accept-Encoding:gzip, deflate, br",
            "Accept-Language:en-US,en;q=0.8",
            "Cache-Control:max-age=0",
            "Connection:keep-alive",
            "Content-Length:1025",
            "Content-Type:application/x-www-form-urlencoded"
        );
curl_setopt($ch, CURLOPT_HTTPHEADER,  $headers);
curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, 0);
curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1); 
curl_setopt($ch, CURLOPT_FOLLOWLOCATION, 1); 
curl_setopt($ch, CURLOPT_COOKIEFILE, $cookie_file_path); 
curl_setopt($ch, CURLOPT_REFERER, $_SERVER['REQUEST_URI']);
curl_setopt($ch, CURLOPT_CUSTOMREQUEST, "POST");
curl_setopt($ch, CURLOPT_POST, 1);
curl_setopt($ch, CURLOPT_POSTFIELDS, $postinfo);
curl_exec($ch);
curl_setopt($ch, CURLOPT_URL, "https://192.18.11.33/RGCS/Default.aspx?dd=0");
$html = curl_exec($ch);
echo $html;
curl_close($ch);

以下是登录页面的原始标题：

Request URL:https://192.18.11.33/Login.aspx?FromMasterLogin=true
Request Method:POST
Status Code:302 Found
Remote Address:192.18.11.33:443
Referrer Policy:no-referrer-when-downgrade
Response Headers
view source
Cache-Control:private
Content-Length:34153
Content-Type:text/html; charset=utf-8
Date:Sat, 15 Apr 2017 09:37:35 GMT
Location:/RGCS/Default.aspx?dd=0
Server:Microsoft-IIS/8.5
Set-Cookie:ASP.NET_SessionId=spw3wky1bsdz0mrwzzojg504; path=/; HttpOnly
X-AspNet-Version:4.0.30319
X-Powered-By:ASP.NET
Request Headers
view source
Accept:text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8
Accept-Encoding:gzip, deflate, br
Accept-Language:en-US,en;q=0.8
Cache-Control:max-age=0
Connection:keep-alive
Content-Length:1025
Content-Type:application/x-www-form-urlencoded
Cookie:ASP.NET_SessionId=
DNT:1
Host:192.18.11.33
Origin:https://192.18.11.33
Referer:https://192.18.11.33/Login.aspx?FromMasterLogin=true
Upgrade-Insecure-Requests:1
User-Agent:Mozilla/5.0 (Windows NT 6.1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/57.0.2987.133 Safari/537.36
Query String Parameters
view source
view URL encoded
FromMasterLogin:true
Form Data
view source
view URL encoded
__EVENTTARGET:btnLogin
__EVENTARGUMENT:
__VIEWSTATE:/wEPDwULLTEzNDc1MTg5NDRkGAIFHl9fQ29udHJvbHNSZXF1aXJlUG9zdEJhY2tLZXlfXxYGBQhidG5Mb2dpbgUPYnRuQ2xlYXJTZXNzaW9uBRFSYWRXaW5kb3dNYW5hZ2VyMQUOcmR3aW5kb3dGb3JnZXQFD3Jkd2luZG93RW5mb3JjZQUYcmRXaW5kb3dQdWJsaWNOZXdzQWxlcnRzBQpyYWRDYXB0Y2hhDxQrAAIFJDcxZmM0ZThmLTRlYTktNDE2Mi1hZTM4LWE0ZmNkNzM0NzY3ZgYAAAAAAAAAAGTJGSQTauu1xAgiX10rd7/Zci9sJhXV9Ilqy4HDolIBqg==
__EVENTVALIDATION:/wEdAAci11URbCuVmlO2wf1gC0M7Y3plgk0YBAefRz3MyBlTcJxpWckI3qdmfEJVCu2f5cGinihG6d/Xh3PZm3b5AoMQf2Dr69OxAarGhVFbQWZWFpd+ecw9lQ5sg8SY03yGmgNKhPS/+yQ5+zLwEb8uDfAwho9uEQI2joMICVOBiz0yDgel4nUaIRbrrP5r1YBnzqE=
txtUserName:psibmaker
txtUserName_ClientState:{"enabled":true,"emptyMessage":""}
txtpassword:Admin!@123
txtpassword_ClientState:{"enabled":true,"emptyMessage":""}
btnLogin_ClientState:
btnClearSession_ClientState:
rdwindowForget_ClientState:
rdwindowEnforce_ClientState:
rdWindowPublicNewsAlerts_ClientState:
RadWindowManager1_ClientState:

所以我的问题是“请求必须分块或具有内容长度。

任何人都可以帮助我吗？感谢您的阅读。