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using System;
using System.Net;
using Microsoft.AspNetCore.Http;
using Microsoft.AspNetCore.Rewrite;
namespace StardewModdingAPI.Web.Framework.RedirectRules
{
/// <summary>Redirect matching requests to a URL.</summary>
internal abstract class RedirectMatchRule : IRule
{
/*********
** Fields
*********/
/// <summary>The status code to use for redirects.</summary>
protected HttpStatusCode StatusCode { get; set; } = HttpStatusCode.Redirect;
/*********
** Public methods
*********/
/// <summary>Applies the rule. Implementations of ApplyRule should set the value for <see cref="RewriteContext.Result" /> (defaults to RuleResult.ContinueRules).</summary>
/// <param name="context">The rewrite context.</param>
public void ApplyRule(RewriteContext context)
{
string? newUrl = this.GetNewUrl(context);
if (newUrl == null)
return;
HttpResponse response = context.HttpContext.Response;
response.StatusCode = (int)HttpStatusCode.Redirect;
response.Headers["Location"] = newUrl;
context.Result = RuleResult.EndResponse;
}
/*********
** Protected methods
*********/
/// <summary>Get the new redirect URL.</summary>
/// <param name="context">The rewrite context.</param>
/// <returns>Returns the redirect URL, or <c>null</c> if the redirect doesn't apply.</returns>
protected abstract string? GetNewUrl(RewriteContext context);
/// <summary>Get the full request URL.</summary>
/// <param name="request">The request.</param>
protected UriBuilder GetUrl(HttpRequest request)
{
return new UriBuilder
{
Scheme = request.Scheme,
Host = request.Host.Host,
Port = request.Host.Port ?? -1,
Path = request.PathBase + request.Path,
Query = request.QueryString.Value
};
}
}
}
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