[英]How send different client certificates on different requests with a single instance of HttpClient in .Net Core?
HttpClient
的建議是重用單個實例。 但是從 API 來看,添加證書的方式似乎是在實例上,而不是每個請求。 例如,如果我們添加兩個證書,我們如何確保“cert 1”僅發送到“one.somedomain.com”?
//A handler is how you add client certs (is there any other way?)
var _clientHandler = new HttpClientHandler();
//Add multiple certs
_clientHandler.ClientCertificates.Add(cert1);
_clientHandler.ClientCertificates.Add(cert2);
_clientHandler.ClientCertificateOptions = ClientCertificateOption.Manual;
//Pretend this is our long-living HttpClient
var client = new HttpClient(_clientHandler);
//Now if we make a post request, will both certs be used?
using (HttpResponseMessage response = _client.PostAsync("https://one.somedomain.com", content).Result)
{
//...elided...
}
對不起。 年底工作量大。 你可以嘗試實現這樣的事情:
public class CustomHttpHandler : HttpClientHandler
{
private readonly Dictionary<string, X509Certificate> _certMap;
public CustomHttpHandler():base()
{
_certMap = new Dictionary<string, X509Certificate>() { { "server1name", new X509Certificate("cert1") }, { "server2name", new X509Certificate("cert2") } };
}
protected override async Task<HttpResponseMessage> SendAsync(
HttpRequestMessage request,
CancellationToken cancellationToken)
{
string serverName = request.RequestUri.Host;
if (ClientCertificates.Contains(_certMap[serverName]))
{
try
{
var response = await base.SendAsync(request, cancellationToken);
return response;
}
catch (Exception ex)
{
Console.WriteLine(ex.Message);
Console.ReadKey();
throw;
}
}
else
{
ClientCertificates.Clear();
ClientCertificates.Add(_certMap[serverName]);
try
{
var response = await base.SendAsync(request, cancellationToken);
return response;
}
catch (Exception ex)
{
Console.WriteLine(ex.Message);
Console.ReadKey();
throw;
}
}
}
}
只是一個想法,沒有測試過。 或者,您也可以在RequestMessage
實例中使用Headers
集合。 本文涵蓋的主題: https : //damienbod.com/2019/09/07/using-certificate-authentication-with-ihttpclientfactory-and-httpclient/
這是建議,但是,您可以使用“using”語句。
一旦 HttpClient 是 IDisposable,你應該使用類似
using(var client = new HttpClient(_clientHandler))
{
//Your code here
}
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