C# 如何使用 WebRequest 访问使用 https 的 SSL 加密站点？
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How do I use WebRequest to access an SSL encrypted site using https?
提问by Alfred B. Thordarson
I'm writing a program that reads content from a user provided URL. My problem is in the code that goes something like this:
我正在编写一个从用户提供的 URL 读取内容的程序。我的问题是在这样的代码中：
Uri uri = new Uri(url);
WebRequest webRequest = WebRequest.Create(uri);
WebResponse webResponse = webRequest.GetResponse();
ReadFrom(webResponse.GetResponseStream());
And this is breaking if the provided urlis an "https://" URL. Can anyone help me with changing this code so that it will work with SSL encrypted content. Thanks.
如果提供的url是“https://” URL ，这将是破坏性的。任何人都可以帮助我更改此代码，以便它可以与 SSL 加密内容一起使用。谢谢。
采纳答案by LukeDuff
You're doing it the correct way but users may be providing urls to sites that have invalid SSL certs installed. You can ignore those cert problems if you put this line in before you make the actual web request:
您正在以正确的方式执行此操作，但用户可能会向安装了无效 SSL 证书的站点提供 URL。如果在发出实际 Web 请求之前输入此行，则可以忽略这些证书问题：
ServicePointManager.ServerCertificateValidationCallback = new System.Net.Security.RemoteCertificateValidationCallback(AcceptAllCertifications);
where AcceptAllCertificationsis defined as
其中AcceptAllCertifications定义为
public bool AcceptAllCertifications(object sender, System.Security.Cryptography.X509Certificates.X509Certificate certification, System.Security.Cryptography.X509Certificates.X509Chain chain, System.Net.Security.SslPolicyErrors sslPolicyErrors)
{
return true;
}
回答by GurdeepS
This link will be of interest to you: http://msdn.microsoft.com/en-us/library/ds8bxk2a.aspx
您会对此链接感兴趣：http: //msdn.microsoft.com/en-us/library/ds8bxk2a.aspx
For http connections, the WebRequest and WebResponse classes use SSL to communicate with web hosts that support SSL. The decision to use SSL is made by the WebRequest class, based on the URI it is given. If the URI begins with "https:", SSL is used; if the URI begins with "http:", an unencrypted connection is used.
对于 http 连接，WebRequest 和 WebResponse 类使用 SSL 与支持 SSL 的 Web 主机通信。使用 SSL 的决定是由 WebRequest 类根据给定的 URI 做出的。如果 URI 以“https:”开头，则使用 SSL；如果 URI 以“http:”开头，则使用未加密的连接。
回答by Nani
This one worked for me:
这个对我有用：
ServicePointManager.SecurityProtocol = SecurityProtocolType.Tls12;
