HttpWebResponse.Cookie 在 .net 框架和 .net core 中的不同行为

Question

我正在从.net框架迁移到.net核心，发现HttpWebRequest/HttpWebResponse有一些奇怪的情况： 任务：需要将 HttpWebRequest 发送到某个地址，其中包含值为"fail"的 cookie A，并从响应中获取 cookie A(但期望 cookie A 在响应标头中具有值"Ok"(。 如果您尝试按名称从响应中获取cookie(例如响应。Cookies["A"](对于.net框架，你会得到"Ok"，对于.net core，你会得到"失败"。

下面是示例(请求和响应中包含1p_JAR(：

CookieContainer cookieContainer = new CookieContainer();
Uri uri = new Uri("https://google.com");
cookieContainer.SetCookies(uri, "k1=1111,k2=2222,k3=3333,1P_JAR=zzz");
HttpWebRequest request = (HttpWebRequest)WebRequest.Create(uri);
request.CookieContainer = cookieContainer;
request.Method = "GET";
HttpWebResponse response = (HttpWebResponse)request.GetResponse();
Console.WriteLine("Cookies from response: ");
foreach (Cookie cookie in response.Cookies)
{
Console.WriteLine("    " + cookie.Name + ": " + cookie.Value);
}
Console.WriteLine("Get cookie by name: " + response.Cookies["1P_JAR"]);

.net 框架的结果：

Cookies from response:
1P_JAR: 2018-10-26-13
NID: bla-bla-bla
Get cookie by name: 1P_JAR=2018-10-26-13

来自 .net 核心的结果：

Cookies from response:
k1: 1111
k2: 2222
k3: 3333
1P_JAR: zzz
1P_JAR: 2018-10-26-13
NID: bla-bla-bla
Get cookie by name: 1P_JAR=zzz

如何在 .net core 中重复 HttpWebRequest/HttpWebResponse 的 .net 框架实现行为？

Answer 1

在 github 中创建了一个问题：https://github.com/dotnet/corefx/issues/33122

适用于 .net Core 和 .net Framework 的解决方案：

public static class HttpWebResponseGetCookiesExtension
{
public static CookieCollection GetResponseCookies(this HttpWebResponse response)
{
#if NETCOREAPP
var cookieContainer = new CookieContainer();
string cookieHeader = response.Headers[HttpResponseHeader.SetCookie] ?? string.Empty;
cookieContainer.SetCookies(response.ResponseUri, cookieHeader);
return cookieContainer.GetCookies(response.ResponseUri);
#else
return response.Cookies;
#endif
}
}