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Program.cs
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Program.cs
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using System;
using System.Collections.Generic;
using System.Linq;
using System.Security.Claims;
using System.Threading.Tasks;
using GraphQL;
using GraphQL.Authorization;
using GraphQL.SystemTextJson;
using GraphQL.Types;
using GraphQL.Validation;
using Microsoft.Extensions.DependencyInjection;
namespace BasicSample
{
internal class Program
{
[System.Diagnostics.CodeAnalysis.SuppressMessage("Style", "IDE1006:Naming Styles", Justification = "main")]
private static async Task Main()
{
using var serviceProvider = new ServiceCollection()
.AddSingleton<IAuthorizationEvaluator, AuthorizationEvaluator>()
.AddTransient<IValidationRule, AuthorizationValidationRule>()
.AddTransient(s =>
{
var authSettings = new AuthorizationSettings();
authSettings.AddPolicy("AdminPolicy", p => p.RequireClaim("role", "Admin"));
return authSettings;
})
.BuildServiceProvider();
string definitions = @"
type User {
id: ID
name: String
}
type Query {
viewer: User
users: [User]
}
";
var schema = Schema.For(definitions, builder => builder.Types.Include<Query>());
// remove claims to see the failure
var authorizedUser = new ClaimsPrincipal(new ClaimsIdentity(new[] { new Claim("role", "Admin") }));
string json = await schema.ExecuteAsync(_ =>
{
_.Query = "{ viewer { id name } }";
_.ValidationRules = serviceProvider
.GetServices<IValidationRule>()
.Concat(DocumentValidator.CoreRules);
_.RequestServices = serviceProvider;
_.UserContext = new GraphQLUserContext { User = authorizedUser };
});
Console.WriteLine(json);
}
}
/// <summary>
/// Custom context class that implements <see cref="IProvideClaimsPrincipal"/>.
/// </summary>
public class GraphQLUserContext : Dictionary<string, object>, IProvideClaimsPrincipal
{
/// <inheritdoc />
public ClaimsPrincipal User { get; set; }
}
/// <summary>
/// CLR type to map to the 'Query' graph type.
/// </summary>
public class Query
{
/// <summary>
/// Resolver for 'Query.viewer' field.
/// </summary>
[GraphQLAuthorize("AdminPolicy")]
public User Viewer() => new User { Id = Guid.NewGuid().ToString(), Name = "Quinn" };
/// <summary>
/// Resolver for 'Query.users' field.
/// </summary>
public List<User> Users() => new List<User> { new User { Id = Guid.NewGuid().ToString(), Name = "Quinn" } };
}
/// <summary>
/// CLR type to map to the 'User' graph type.
/// </summary>
public class User
{
/// <summary>
/// Resolver for 'User.id' field. Just a simple property.
/// </summary>
public string Id { get; set; }
/// <summary>
/// Resolver for 'User.name' field. Just a simple property.
/// </summary>
public string Name { get; set; }
}
}