我正在尝试将WebForm URL重定向到.NET Core。假设用户输入 www.test.com/index.aspx 在URL中,它将重定向到 www.test.com/home/index
因此,在"归档"中,我如何检测到它是从index.aspx重定向到家庭/索引的?
我的研究表明,这将是下面的,但它们与.NET Core
不兼容var request = (HttpWebRequest)WebRequest.Create(uri);
request.Method = "HEAD";
request.AllowAutoRedirect = false;
string location;
using (var response = request.GetResponse() as HttpWebResponse)
{
location = response.GetResponseHeader("Location");
}
帮助。
您的代码与.NET Core 1.1不兼容,但是与.NET Core 2.0兼容。因此,如果可能的话,只需更改目标框架。
您还应该稍微调整代码。如果发生重定向,则.NET Core HttpWebRequest.GetResponse()
方法将投掷WebException
。因此,您应该尝试捕获它并分析WebException.Response
:
try
{
using (request.GetResponse() as HttpWebResponse)
{
}
}
catch (WebException e)
{
var location = e.Response.Headers["Location"];
}
但是,我建议将HttpClient
用作替代方案。它将允许您毫无例外地完成工作:
using (HttpClientHandler handler = new HttpClientHandler())
{
handler.AllowAutoRedirect = false;
using (HttpClient httpClient = new HttpClient(handler))
using (HttpRequestMessage request = new HttpRequestMessage(HttpMethod.Head, uri))
using (var response = await httpClient.SendAsync(request))
{
var location = response.Headers.Location;
}
}
HttpClient
方法既适用于.net Core 1.1和2.0版本。
update
HttpResponseMessage
中没有类似的 IsRedirected
属性,但是您可以对其使用简单的扩展方法:
public static class HttpResponseMessageExtensions
{
public static bool IsRedirected(this HttpResponseMessage response)
{
var code = response.StatusCode;
return code == HttpStatusCode.MovedPermanently || code == HttpStatusCode.Found;
}
}
bool redirected = response.WasRedirected();