WebApi 增加身份验证（OAuth 2.0方式）

1，在Webapi项目下添加如下引用：

Microsoft.AspNet.WebApi.Owin

Owin

Microsoft.Owin.Host.SystemWeb

Microsoft.Owin.Security.OAuth

Microsoft.Owin.Security.Cookies

Microsoft.AspNet.Identity.Owin

Microsoft.Owin.Cors

2，在项目下新建Startup类，这个类将作为owin的启动入口，添加下面的代码

3，修改 Startup类中方法

1234567891011121314151617181920212223242526public class Startup{    public void
Configuration(IAppBuilder app)    {        // 有关如何配置应用程序的详细信息，请访问
http://go.microsoft.com/fwlink/?LinkID=316888        ConfigAuth(app);
HttpConfiguration config =new HttpConfiguration();
WebApiConfig.Register(config);        app.UseCors(CorsOptions.AllowAll);
app.UseWebApi(config);    }    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());    }}
4， OAuth身份认证，新建SimpleAuthorizationServerProvider类

123456789101112131415161718192021222324public class
SimpleAuthorizationServerProvider : OAuthAuthorizationServerProvider{    public
override Task
ValidateClientAuthentication(OAuthValidateClientAuthenticationContext context)
    {        context.Validated();        return Task.FromResult<object>(null);
    }    public override async Task
GrantResourceOwnerCredentials(OAuthGrantResourceOwnerCredentialsContext context)
    {        context.OwinContext.Response.Headers.Add(
"Access-Control-Allow-Origin", new[] { "*" });        AccountService accService
=new AccountService();        string md5Pwd =
LogHelper.MD5CryptoPasswd(context.Password);        IList<object[]> ul =
accService.Login(context.UserName, md5Pwd);        if (ul.Count() == 0)        {
            context.SetError("invalid_grant", "The username or password is
incorrect");            return;        }        var identity = new
ClaimsIdentity(context.Options.AuthenticationType);        identity.AddClaim(new
Claim("sub", context.UserName));        identity.AddClaim(new Claim("role",
"user"));        context.Validated(identity);    }}
5，新建SimpleRefreshTokenProvider类

12345678910111213141516171819202122232425262728public 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);        }    }}
6，在要加验证的接口上加上[Authorize]标记

12345678910[Authorize]public class EmployeeController : ApiController{
//查询所有员工    [HttpGet]    public IList<UC_Employee> GetAllEmps()    {　　    return
new List<UC_Employee>();    }}
7，调用api程序

8,传入参数，获取token

9，传入access_token

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作者：Lnice <http://www.cnblogs.com/lnice>
出处：https://www.cnblogs.com/lnice/p/6857203.html
<https://www.cnblogs.com/lnice/p/6857203.html>

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