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using System;
using System.Threading.Tasks;
using MediaBrowser.Controller.Configuration;
using Microsoft.AspNetCore.Http;
using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.Logging;
using ConfigurationExtensions = MediaBrowser.Controller.Extensions.ConfigurationExtensions;
namespace Jellyfin.Server.Middleware
{
/// <summary>
/// Redirect requests without baseurl prefix to the baseurl prefixed URL.
/// </summary>
public class BaseUrlRedirectionMiddleware
{
private readonly RequestDelegate _next;
private readonly ILogger<BaseUrlRedirectionMiddleware> _logger;
private readonly IConfiguration _configuration;
/// <summary>
/// Initializes a new instance of the <see cref="BaseUrlRedirectionMiddleware"/> class.
/// </summary>
/// <param name="next">The next delegate in the pipeline.</param>
/// <param name="logger">The logger.</param>
/// <param name="configuration">The application configuration.</param>
public BaseUrlRedirectionMiddleware(
RequestDelegate next,
ILogger<BaseUrlRedirectionMiddleware> logger,
IConfiguration configuration)
{
_next = next;
_logger = logger;
_configuration = configuration;
}
/// <summary>
/// Executes the middleware action.
/// </summary>
/// <param name="httpContext">The current HTTP context.</param>
/// <param name="serverConfigurationManager">The server configuration manager.</param>
/// <returns>The async task.</returns>
public async Task Invoke(HttpContext httpContext, IServerConfigurationManager serverConfigurationManager)
{
var localPath = httpContext.Request.Path.ToString();
var baseUrlPrefix = serverConfigurationManager.Configuration.BaseUrl;
if (string.Equals(localPath, baseUrlPrefix + "/", StringComparison.OrdinalIgnoreCase)
|| string.Equals(localPath, baseUrlPrefix, StringComparison.OrdinalIgnoreCase)
|| string.Equals(localPath, "/", StringComparison.OrdinalIgnoreCase)
|| string.IsNullOrEmpty(localPath)
|| !localPath.StartsWith(baseUrlPrefix, StringComparison.OrdinalIgnoreCase))
{
// Always redirect back to the default path if the base prefix is invalid or missing
_logger.LogDebug("Normalizing an URL at {LocalPath}", localPath);
httpContext.Response.Redirect(baseUrlPrefix + "/" + _configuration[ConfigurationExtensions.DefaultRedirectKey]);
return;
}
await _next(httpContext).ConfigureAwait(false);
}
}
}
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