79 lines
3.3 KiB
C#
79 lines
3.3 KiB
C#
using System;
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using System.Threading.Tasks;
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using Jellyfin.Networking.Configuration;
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using MediaBrowser.Controller.Configuration;
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using Microsoft.AspNetCore.Http;
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using Microsoft.Extensions.Configuration;
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using Microsoft.Extensions.Logging;
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using static MediaBrowser.Controller.Extensions.ConfigurationExtensions;
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namespace Jellyfin.Api.Middleware;
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/// <summary>
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/// Redirect requests without baseurl prefix to the baseurl prefixed URL.
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/// </summary>
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public class BaseUrlRedirectionMiddleware
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{
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private readonly RequestDelegate _next;
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private readonly ILogger<BaseUrlRedirectionMiddleware> _logger;
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private readonly IConfiguration _configuration;
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/// <summary>
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/// Initializes a new instance of the <see cref="BaseUrlRedirectionMiddleware"/> class.
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/// </summary>
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/// <param name="next">The next delegate in the pipeline.</param>
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/// <param name="logger">The logger.</param>
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/// <param name="configuration">The application configuration.</param>
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public BaseUrlRedirectionMiddleware(
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RequestDelegate next,
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ILogger<BaseUrlRedirectionMiddleware> logger,
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IConfiguration configuration)
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{
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_next = next;
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_logger = logger;
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_configuration = configuration;
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}
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/// <summary>
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/// Executes the middleware action.
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/// </summary>
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/// <param name="httpContext">The current HTTP context.</param>
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/// <param name="serverConfigurationManager">The server configuration manager.</param>
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/// <returns>The async task.</returns>
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public async Task Invoke(HttpContext httpContext, IServerConfigurationManager serverConfigurationManager)
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{
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var localPath = httpContext.Request.Path.ToString();
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var baseUrlPrefix = serverConfigurationManager.GetNetworkConfiguration().BaseUrl;
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if (string.IsNullOrEmpty(localPath)
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|| string.Equals(localPath, baseUrlPrefix, StringComparison.OrdinalIgnoreCase)
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|| string.Equals(localPath, baseUrlPrefix + "/", StringComparison.OrdinalIgnoreCase)
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|| !localPath.StartsWith(baseUrlPrefix, StringComparison.OrdinalIgnoreCase)
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)
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{
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// Redirect health endpoint
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if (string.Equals(localPath, "/health", StringComparison.OrdinalIgnoreCase)
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|| string.Equals(localPath, "/health/", StringComparison.OrdinalIgnoreCase))
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{
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_logger.LogDebug("Redirecting /health check");
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httpContext.Response.Redirect(baseUrlPrefix + "/health");
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return;
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}
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// Always redirect back to the default path if the base prefix is invalid or missing
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_logger.LogDebug("Normalizing an URL at {LocalPath}", localPath);
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var port = httpContext.Request.Host.Port ?? -1;
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var uri = new UriBuilder(httpContext.Request.Scheme, httpContext.Request.Host.Host, port, localPath).Uri;
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var redirectUri = new UriBuilder(httpContext.Request.Scheme, httpContext.Request.Host.Host, port, baseUrlPrefix + "/" + _configuration[DefaultRedirectKey]).Uri;
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var target = uri.MakeRelativeUri(redirectUri).ToString();
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_logger.LogDebug("Redirecting to {Target}", target);
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httpContext.Response.Redirect(target);
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return;
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}
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await _next(httpContext).ConfigureAwait(false);
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}
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}
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