WebApi的创建，部署，Oauth身份认证（三）

一，二文章我们讲了WebApi的创建，部署，下面我们来点干货Oauth身份认证

1.安装所需的NuGet包：

1.Microsoft.AspNet.WebApi.Owin

2.Microsoft.Owin.Host.SystemWeb

3.Microsoft.AspNet.Identity.Owin

4.Microsoft.Owin.Cors

5.Microsoft.Owin.Security

6.Microsoft.Owin.Security.OAuth

2.在根目录添加 SimpleAuthorizationServerProvider.cs

using Microsoft.Owin.Security.OAuth;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Security.Claims;
using System.Threading.Tasks;
using System.Web;

namespace WebApplication4
{
    /// <summary>
    /// Token验证
    /// </summary>
    public class SimpleAuthorizationServerProvider : OAuthAuthorizationServerProvider
    {
        public override async Task ValidateClientAuthentication(OAuthValidateClientAuthenticationContext context)
        {
            await Task.Factory.StartNew(() => context.Validated());
        }

        public override async Task GrantResourceOwnerCredentials(OAuthGrantResourceOwnerCredentialsContext context)
        {
            await Task.Factory.StartNew(() => context.OwinContext.Response.Headers.Add("Access-Control-Allow-Origin", new[] { "*" }));
            // 对用户名、密码进行数据校验
            string UserName = context.UserName;
            string Password = context.Password;
            if (UserName!= "zhuzhi" || Password != "123456")
            {
                context.SetError("invalid_grant", "用户名和密码错误！");
                return;
            }
            var identity = new ClaimsIdentity(context.Options.AuthenticationType);
            identity.AddClaim(new Claim("sub", context.UserName));
            identity.AddClaim(new Claim("role", "user"));

            context.Validated(identity);

        }
    }
}

3.在根目录添加 SimpleRefreshTokenProvider.cs

using Microsoft.Owin.Security.Infrastructure;
using System;
using System.Collections.Concurrent;
using System.Collections.Generic;
using System.Linq;
using System.Web;

namespace WebApplication4
{
    public class SimpleRefreshTokenProvider : AuthenticationTokenProvider
    {
        private static ConcurrentDictionary<string, string> _refreshTokens = new ConcurrentDictionary<string, string>();

        /// <summary>
        /// 生成 refresh_token
        /// </summary>
        public override void Create(AuthenticationTokenCreateContext context)
        {
            context.Ticket.Properties.IssuedUtc = DateTime.UtcNow;
            context.Ticket.Properties.ExpiresUtc = DateTime.UtcNow.AddDays(60);

            context.SetToken(Guid.NewGuid().ToString("n"));
            _refreshTokens[context.Token] = context.SerializeTicket();
        }

        /// <summary>
        /// 由 refresh_token 解析成 access_token
        /// </summary>
        public override void Receive(AuthenticationTokenReceiveContext context)
        {
            string value;
            if (_refreshTokens.TryRemove(context.Token, out value))
            {
                context.DeserializeTicket(value);
            }
        }
    }
}

4.在根目录添加 Startup.cs

using Microsoft.Owin;
using Microsoft.Owin.Security.OAuth;
using Owin;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.Http;

[assembly: OwinStartup(typeof(WebApplication4.Startup))]
namespace WebApplication4
{
    public class Startup
    {
        public void Configuration(IAppBuilder app)
        {
            HttpConfiguration config = new HttpConfiguration();

            //ConfigureOAuth(app);
            ConfigAuth(app);

            WebApiConfig.Register(config);
            app.UseCors(Microsoft.Owin.Cors.CorsOptions.AllowAll);
            app.UseWebApi(config);
        }
        /// <summary>
        /// 普通方法
        /// </summary>
        /// <param name="app"></param>
        public void ConfigureOAuth(IAppBuilder app)
        {
            OAuthAuthorizationServerOptions OAuthServerOptions = new OAuthAuthorizationServerOptions()
            {
                AllowInsecureHttp = true,
                TokenEndpointPath = new PathString("/token"),
                AccessTokenExpireTimeSpan = TimeSpan.FromDays(1),
                Provider = new SimpleAuthorizationServerProvider()
            };
            app.UseOAuthAuthorizationServer(OAuthServerOptions);
            app.UseOAuthBearerAuthentication(new OAuthBearerAuthenticationOptions());
        }
        /// <summary>
        /// access_token 过期
        /// </summary>
        /// <param name="app"></param>
        public void ConfigAuth(IAppBuilder app)
        {
            OAuthAuthorizationServerOptions option = new OAuthAuthorizationServerOptions()
            {
                AllowInsecureHttp = true,
                TokenEndpointPath = new PathString("/token"), //获取 access_token 授权服务请求地址
                AccessTokenExpireTimeSpan = TimeSpan.FromDays(1), //access_token 过期时间
                Provider = new SimpleAuthorizationServerProvider(), //access_token 相关授权服务
                RefreshTokenProvider = new SimpleRefreshTokenProvider() //refresh_token 授权服务
            };
            app.UseOAuthAuthorizationServer(option);
            app.UseOAuthBearerAuthentication(new OAuthBearerAuthenticationOptions());
        }
    }

}