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jellyfin/Jellyfin.Server/Extensions/ApiServiceCollectionExtensi...

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using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Net;
using System.Net.Sockets;
using System.Reflection;
using System.Security.Claims;
using Emby.Server.Implementations;
using Jellyfin.Api.Auth;
using Jellyfin.Api.Auth.AnonymousLanAccessPolicy;
using Jellyfin.Api.Auth.DefaultAuthorizationPolicy;
using Jellyfin.Api.Auth.FirstTimeSetupPolicy;
using Jellyfin.Api.Auth.LocalAccessOrRequiresElevationPolicy;
using Jellyfin.Api.Auth.SyncPlayAccessPolicy;
using Jellyfin.Api.Auth.UserPermissionPolicy;
using Jellyfin.Api.Constants;
using Jellyfin.Api.Controllers;
using Jellyfin.Api.Formatters;
using Jellyfin.Api.ModelBinders;
using Jellyfin.Data.Enums;
using Jellyfin.Extensions.Json;
using Jellyfin.Networking.Configuration;
using Jellyfin.Server.Configuration;
using Jellyfin.Server.Filters;
using MediaBrowser.Common.Net;
using MediaBrowser.Model.Entities;
using MediaBrowser.Model.Session;
using Microsoft.AspNetCore.Authentication;
using Microsoft.AspNetCore.Authorization;
using Microsoft.AspNetCore.Builder;
using Microsoft.AspNetCore.Cors.Infrastructure;
using Microsoft.AspNetCore.HttpOverrides;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.OpenApi.Any;
using Microsoft.OpenApi.Interfaces;
using Microsoft.OpenApi.Models;
using Swashbuckle.AspNetCore.SwaggerGen;
using AuthenticationSchemes = Jellyfin.Api.Constants.AuthenticationSchemes;
namespace Jellyfin.Server.Extensions
{
/// <summary>
/// API specific extensions for the service collection.
/// </summary>
public static class ApiServiceCollectionExtensions
{
/// <summary>
/// Adds jellyfin API authorization policies to the DI container.
/// </summary>
/// <param name="serviceCollection">The service collection.</param>
/// <returns>The updated service collection.</returns>
public static IServiceCollection AddJellyfinApiAuthorization(this IServiceCollection serviceCollection)
{
// The default handler must be first so that it is evaluated first
serviceCollection.AddSingleton<IAuthorizationHandler, DefaultAuthorizationHandler>();
serviceCollection.AddSingleton<IAuthorizationHandler, UserPermissionHandler>();
serviceCollection.AddSingleton<IAuthorizationHandler, FirstTimeSetupHandler>();
serviceCollection.AddSingleton<IAuthorizationHandler, AnonymousLanAccessHandler>();
serviceCollection.AddSingleton<IAuthorizationHandler, SyncPlayAccessHandler>();
return serviceCollection.AddAuthorizationCore(options =>
{
options.DefaultPolicy = new AuthorizationPolicyBuilder()
.AddAuthenticationSchemes(AuthenticationSchemes.CustomAuthentication)
.AddRequirements(new DefaultAuthorizationRequirement())
.Build();
options.AddPolicy(Policies.AnonymousLanAccessPolicy, new AnonymousLanAccessRequirement());
options.AddPolicy(Policies.CollectionManagement, new UserPermissionRequirement(PermissionKind.EnableCollectionManagement));
options.AddPolicy(Policies.Download, new UserPermissionRequirement(PermissionKind.EnableContentDownloading));
options.AddPolicy(Policies.FirstTimeSetupOrDefault, new FirstTimeSetupRequirement(requireAdmin: false));
options.AddPolicy(Policies.FirstTimeSetupOrElevated, new FirstTimeSetupRequirement());
options.AddPolicy(Policies.FirstTimeSetupOrIgnoreParentalControl, new FirstTimeSetupRequirement(false, false));
options.AddPolicy(Policies.IgnoreParentalControl, new DefaultAuthorizationRequirement(validateParentalSchedule: false));
options.AddPolicy(Policies.LiveTvAccess, new UserPermissionRequirement(PermissionKind.EnableLiveTvAccess));
options.AddPolicy(Policies.LiveTvManagement, new UserPermissionRequirement(PermissionKind.EnableLiveTvManagement));
options.AddPolicy(Policies.LocalAccessOrRequiresElevation, new LocalAccessOrRequiresElevationRequirement());
options.AddPolicy(Policies.SyncPlayHasAccess, new SyncPlayAccessRequirement(SyncPlayAccessRequirementType.HasAccess));
options.AddPolicy(Policies.SyncPlayCreateGroup, new SyncPlayAccessRequirement(SyncPlayAccessRequirementType.CreateGroup));
options.AddPolicy(Policies.SyncPlayJoinGroup, new SyncPlayAccessRequirement(SyncPlayAccessRequirementType.JoinGroup));
options.AddPolicy(Policies.SyncPlayIsInGroup, new SyncPlayAccessRequirement(SyncPlayAccessRequirementType.IsInGroup));
options.AddPolicy(
Policies.RequiresElevation,
policy => policy.AddAuthenticationSchemes(AuthenticationSchemes.CustomAuthentication)
.RequireClaim(ClaimTypes.Role, UserRoles.Administrator));
});
}
/// <summary>
/// Adds custom legacy authentication to the service collection.
/// </summary>
/// <param name="serviceCollection">The service collection.</param>
/// <returns>The updated service collection.</returns>
public static AuthenticationBuilder AddCustomAuthentication(this IServiceCollection serviceCollection)
{
return serviceCollection.AddAuthentication(AuthenticationSchemes.CustomAuthentication)
.AddScheme<AuthenticationSchemeOptions, CustomAuthenticationHandler>(AuthenticationSchemes.CustomAuthentication, null);
}
/// <summary>
/// Extension method for adding the Jellyfin API to the service collection.
/// </summary>
/// <param name="serviceCollection">The service collection.</param>
/// <param name="pluginAssemblies">An IEnumerable containing all plugin assemblies with API controllers.</param>
/// <param name="config">The <see cref="NetworkConfiguration"/>.</param>
/// <returns>The MVC builder.</returns>
public static IMvcBuilder AddJellyfinApi(this IServiceCollection serviceCollection, IEnumerable<Assembly> pluginAssemblies, NetworkConfiguration config)
{
IMvcBuilder mvcBuilder = serviceCollection
.AddCors()
.AddTransient<ICorsPolicyProvider, CorsPolicyProvider>()
.Configure<ForwardedHeadersOptions>(options =>
{
// https://github.com/dotnet/aspnetcore/blob/master/src/Middleware/HttpOverrides/src/ForwardedHeadersMiddleware.cs
// Enable debug logging on Microsoft.AspNetCore.HttpOverrides.ForwardedHeadersMiddleware to help investigate issues.
options.ForwardedHeaders = ForwardedHeaders.XForwardedFor | ForwardedHeaders.XForwardedProto | ForwardedHeaders.XForwardedHost;
if (config.KnownProxies.Length == 0)
{
options.KnownNetworks.Clear();
options.KnownProxies.Clear();
}
else
{
AddProxyAddresses(config, config.KnownProxies, options);
}
// Only set forward limit if we have some known proxies or some known networks.
if (options.KnownProxies.Count != 0 || options.KnownNetworks.Count != 0)
{
options.ForwardLimit = null;
}
})
.AddMvc(opts =>
{
// Allow requester to change between camelCase and PascalCase
opts.RespectBrowserAcceptHeader = true;
opts.OutputFormatters.Insert(0, new CamelCaseJsonProfileFormatter());
opts.OutputFormatters.Insert(0, new PascalCaseJsonProfileFormatter());
opts.OutputFormatters.Add(new CssOutputFormatter());
opts.OutputFormatters.Add(new XmlOutputFormatter());
opts.ModelBinderProviders.Insert(0, new NullableEnumModelBinderProvider());
})
// Clear app parts to avoid other assemblies being picked up
.ConfigureApplicationPartManager(a => a.ApplicationParts.Clear())
.AddApplicationPart(typeof(StartupController).Assembly)
.AddJsonOptions(options =>
{
// Update all properties that are set in JsonDefaults
var jsonOptions = JsonDefaults.PascalCaseOptions;
// From JsonDefaults
options.JsonSerializerOptions.ReadCommentHandling = jsonOptions.ReadCommentHandling;
options.JsonSerializerOptions.WriteIndented = jsonOptions.WriteIndented;
options.JsonSerializerOptions.DefaultIgnoreCondition = jsonOptions.DefaultIgnoreCondition;
options.JsonSerializerOptions.NumberHandling = jsonOptions.NumberHandling;
options.JsonSerializerOptions.Converters.Clear();
foreach (var converter in jsonOptions.Converters)
{
options.JsonSerializerOptions.Converters.Add(converter);
}
// From JsonDefaults.PascalCase
options.JsonSerializerOptions.PropertyNamingPolicy = jsonOptions.PropertyNamingPolicy;
});
foreach (Assembly pluginAssembly in pluginAssemblies)
{
mvcBuilder.AddApplicationPart(pluginAssembly);
}
return mvcBuilder.AddControllersAsServices();
}
/// <summary>
/// Adds Swagger to the service collection.
/// </summary>
/// <param name="serviceCollection">The service collection.</param>
/// <returns>The updated service collection.</returns>
public static IServiceCollection AddJellyfinApiSwagger(this IServiceCollection serviceCollection)
{
return serviceCollection.AddSwaggerGen(c =>
{
var version = typeof(ApplicationHost).Assembly.GetName().Version?.ToString(3) ?? "0.0.1";
c.SwaggerDoc("api-docs", new OpenApiInfo
{
Title = "Jellyfin API",
Version = version,
Extensions = new Dictionary<string, IOpenApiExtension>
{
{
"x-jellyfin-version",
new OpenApiString(version)
}
}
});
c.AddSecurityDefinition(AuthenticationSchemes.CustomAuthentication, new OpenApiSecurityScheme
{
Type = SecuritySchemeType.ApiKey,
In = ParameterLocation.Header,
Name = "Authorization",
Description = "API key header parameter"
});
// Add all xml doc files to swagger generator.
var xmlFiles = Directory.GetFiles(
AppContext.BaseDirectory,
"*.xml",
SearchOption.TopDirectoryOnly);
foreach (var xmlFile in xmlFiles)
{
c.IncludeXmlComments(xmlFile);
}
// Order actions by route path, then by http method.
c.OrderActionsBy(description =>
$"{description.ActionDescriptor.RouteValues["controller"]}_{description.RelativePath}");
// Use method name as operationId
c.CustomOperationIds(
description =>
{
description.TryGetMethodInfo(out MethodInfo methodInfo);
// Attribute name, method name, none.
return description?.ActionDescriptor.AttributeRouteInfo?.Name
?? methodInfo?.Name
?? null;
});
// Allow parameters to properly be nullable.
c.UseAllOfToExtendReferenceSchemas();
c.SupportNonNullableReferenceTypes();
// TODO - remove when all types are supported in System.Text.Json
c.AddSwaggerTypeMappings();
c.OperationFilter<SecurityRequirementsOperationFilter>();
c.OperationFilter<FileResponseFilter>();
c.OperationFilter<FileRequestFilter>();
c.OperationFilter<ParameterObsoleteFilter>();
c.DocumentFilter<AdditionalModelFilter>();
});
}
private static void AddPolicy(this AuthorizationOptions authorizationOptions, string policyName, IAuthorizationRequirement authorizationRequirement)
{
authorizationOptions.AddPolicy(policyName, policy =>
{
policy.AddAuthenticationSchemes(AuthenticationSchemes.CustomAuthentication).AddRequirements(authorizationRequirement);
});
}
/// <summary>
/// Sets up the proxy configuration based on the addresses/subnets in <paramref name="allowedProxies"/>.
/// </summary>
/// <param name="config">The <see cref="NetworkConfiguration"/> containing the config settings.</param>
/// <param name="allowedProxies">The string array to parse.</param>
/// <param name="options">The <see cref="ForwardedHeadersOptions"/> instance.</param>
internal static void AddProxyAddresses(NetworkConfiguration config, string[] allowedProxies, ForwardedHeadersOptions options)
{
for (var i = 0; i < allowedProxies.Length; i++)
{
if (IPAddress.TryParse(allowedProxies[i], out var addr))
{
AddIpAddress(config, options, addr, addr.AddressFamily == AddressFamily.InterNetwork ? 32 : 128);
}
else if (NetworkExtensions.TryParseToSubnet(allowedProxies[i], out var subnet))
{
if (subnet != null)
{
AddIpAddress(config, options, subnet.Prefix, subnet.PrefixLength);
}
}
else if (NetworkExtensions.TryParseHost(allowedProxies[i], out var addresses))
{
foreach (var address in addresses)
{
AddIpAddress(config, options, address, address.AddressFamily == AddressFamily.InterNetwork ? 32 : 128);
}
}
}
}
private static void AddIpAddress(NetworkConfiguration config, ForwardedHeadersOptions options, IPAddress addr, int prefixLength)
{
if ((!config.EnableIPv4 && addr.AddressFamily == AddressFamily.InterNetwork) || (!config.EnableIPv6 && addr.AddressFamily == AddressFamily.InterNetworkV6))
{
return;
}
if (addr.IsIPv4MappedToIPv6)
{
addr = addr.MapToIPv4();
}
if (prefixLength == 32)
{
options.KnownProxies.Add(addr);
}
else
{
options.KnownNetworks.Add(new IPNetwork(addr, prefixLength));
}
}
private static void AddSwaggerTypeMappings(this SwaggerGenOptions options)
{
/*
* TODO remove when System.Text.Json properly supports non-string keys.
* Used in BaseItemDto.ImageBlurHashes
*/
options.MapType<Dictionary<ImageType, string>>(() =>
new OpenApiSchema
{
Type = "object",
AdditionalProperties = new OpenApiSchema
{
Type = "string"
}
});
/*
* Support BlurHash dictionary
*/
options.MapType<Dictionary<ImageType, Dictionary<string, string>>>(() =>
new OpenApiSchema
{
Type = "object",
Properties = typeof(ImageType).GetEnumNames().ToDictionary(
name => name,
_ => new OpenApiSchema
{
Type = "object",
AdditionalProperties = new OpenApiSchema
{
Type = "string"
}
})
});
// Support dictionary with nullable string value.
options.MapType<Dictionary<string, string?>>(() =>
new OpenApiSchema
{
Type = "object",
AdditionalProperties = new OpenApiSchema
{
Type = "string",
Nullable = true
}
});
// Manually describe Flags enum.
options.MapType<TranscodeReason>(() =>
new OpenApiSchema
{
Type = "array",
Items = new OpenApiSchema
{
Reference = new OpenApiReference
{
Id = nameof(TranscodeReason),
Type = ReferenceType.Schema,
}
}
});
// Swashbuckle doesn't use JsonOptions to describe responses, so we need to manually describe it.
options.MapType<Version>(() => new OpenApiSchema
{
Type = "string"
});
}
}
}