httpHelper爬HTTP/2.0网站的问题

csxyy

苏飞站长，各位大侠，我现在在尝试爬取  https://spa16.scrape.center/这个网站被站长强制设成了http/2.0模式
我的VS版本为2017 ，
为了增加item中：ProtocolVersion = HttpVersion.Version20 ,KeepAlive = false,

我将.net framework从4.7.2升级到了netCore2.1
并更新httphelper版本为2.2.9

但还是报“配置参数时出错：Only HTTP/1.0 and HTTP/1.1 version requests are currently supported.Parameter name: value”

怎么解决啊






补充内容 (2021-5-18 10:38):
又折腾到了3.1，也是如此.....看来什么没有配置。但是百度也百不到

csxyy

我研究了一下，苏飞站长
是因为request.ProtocolVersion = item.ProtocolVersion;

这句话不支持HttpVersion.Version20吗？

站长苏飞

这个你带上证书试试，提示信息是什么有吗

csxyy

我已经带上了证书，httpItem里也有设置CerPath
我做过以下尝试
1、如果httpItem里不增加ProtocolVersion = HttpVersion.Version20
那么，会提示：
The SSL connection could not be established, see inner exception. Unable to cast object of type 'System.Security.Cryptography.X509Certificates.X509Certificate' to type 'System.Security.Cryptography.X509Certificates.X509Certificate2'.

强制增加
request.ClientCertificates.Add(new X509Certificate2(item.CerPath));
则提示：
An error occurred while sending the request. Unable to read data from the transport connection: 远程主机强迫关闭了一个现有的连接。.

2、如果增加ProtocolVersion = HttpVersion.Version20
则回提示配置参数时出错：Only HTTP/1.0 and HTTP/1.1 version requests are currently supported.Parameter name: value”