1.OAuth密码模式
2.在VS中创建WebAPI项目
在nuget中安装：
Microsoft.AspNet.WebApi.Owin
Microsoft.Owin.Host.SystemWeb
这两个类库并添加Owin启动类Startup
using System;
using System.Threading.Tasks;
using Microsoft.Owin;
using Owin;
using Microsoft.Owin.Security.OAuth; [assembly: OwinStartup(typeof(WebAPIOAuth.Startup))] namespace WebAPIOAuth
{
public class Startup
{
public void Configuration(IAppBuilder app)
{
var OAuthOptions = new OAuthAuthorizationServerOptions
{
AllowInsecureHttp = true,
TokenEndpointPath = new PathString("/token"), //获取 access_token 授权服务请求地址
AuthorizeEndpointPath = new PathString("/authorize"), //获取 authorization_code 授权服务请求地址
AccessTokenExpireTimeSpan = TimeSpan.FromSeconds(), //access_token 过期时间 Provider = new OpenAuthorizationServerProvider(), //access_token 相关授权服务
}; app.UseOAuthBearerTokens(OAuthOptions); //表示 token_type 使用 bearer 方式 不记名令牌验证
}
}
}
ConfigureOAuth(IAppBuilder app)方法开启了OAuth服务。简单说一下OAuthAuthorizationServerOptions中各参数的含义：
AllowInsecureHttp：允许客户端一http协议请求；
TokenEndpointPath：token请求的地址，即http://localhost:端口号/token；
AccessTokenExpireTimeSpan ：token过期时间；
Provider ：提供具体的认证策略；
3.继承授权服务OAuthAuthorizationServerProvider类
重载ValidateClientAuthentication方法验证客户端的正确性
重载GrantResourceOwnerCredentials方法实现用户名密码的验证，验证通过后会颁发token。
public class OpenAuthorizationServerProvider : OAuthAuthorizationServerProvider
{
/// <summary>
/// 验证调用端的clientid与clientSecret已验证调用端的合法性(clientid、clientSecret为约定好的字符串)。
/// </summary>
/// <param name="context"></param>
/// <returns></returns>
public override async Task ValidateClientAuthentication(OAuthValidateClientAuthenticationContext context)
{
string clientId;
string clientSecret;
context.TryGetBasicCredentials(out clientId, out clientSecret);
if (clientId == "" && clientSecret == "")
{
context.Validated(clientId);
}
await base.ValidateClientAuthentication(context);
} /// <summary>
/// 通过重载GrantResourceOwnerCredentials获取用户名和密码进行认证
/// </summary>
/// <param name="context"></param>
/// <returns></returns>
public override async Task GrantResourceOwnerCredentials(OAuthGrantResourceOwnerCredentialsContext context)
{
//调用后台的登录服务验证用户名与密码
if (context.UserName != "Admin" || context.Password != "")
{
context.SetError("invalid_grant", "用户名或密码不正确。");
return;
} var oAuthIdentity = new ClaimsIdentity(context.Options.AuthenticationType);
oAuthIdentity.AddClaim(new Claim(ClaimTypes.Name, context.UserName));
var ticket = new AuthenticationTicket(oAuthIdentity, new AuthenticationProperties());
context.Validated(ticket); await base.GrantResourceOwnerCredentials(context);
}
}
在需要验证的方法处添加[Authorize]标签，当访问此接口时必须通过授权验证才可访问。
以上服务器端代码全部完成。
4.创建新的客户端项目进行测试
添加测试类
class OAuthClientTest
{
private HttpClient _httpClient;
private string token; public OAuthClientTest()
{
_httpClient = new HttpClient();
_httpClient.BaseAddress = new Uri("http://localhost");
} public async Task<string> GetAccessToken()
{
var clientId = "";
var clientSecret = ""; var parameters = new Dictionary<string, string>();
parameters.Add("grant_type", "password");
parameters.Add("username", "Admin");
parameters.Add("password", ""); _httpClient.DefaultRequestHeaders.Authorization = new AuthenticationHeaderValue(
"Basic",
Convert.ToBase64String(Encoding.ASCII.GetBytes(clientId + ":" + clientSecret))
); var response = await _httpClient.PostAsync("OAuthTest/token", new FormUrlEncodedContent(parameters));
var responseValue = await response.Content.ReadAsStringAsync();
if (response.StatusCode == System.Net.HttpStatusCode.OK)
{
return JObject.Parse(responseValue)["access_token"].Value<string>();
}
else
{
Console.WriteLine(responseValue);
return string.Empty;
}
} public async Task Call_WebAPI_By_Resource_Owner_Password_Credentials_Grant()
{
if(string.IsNullOrEmpty(token))
token = await GetAccessToken();
Console.WriteLine(token);
_httpClient.DefaultRequestHeaders.Authorization = new AuthenticationHeaderValue("Bearer", token);
Console.WriteLine(await (await _httpClient.GetAsync("OAuthTest/api/Values")).Content.ReadAsStringAsync());
}
}
main方法中调用进行测试：
static void Main(string[] args)
{
var clientTest = new OAuthClientTest();
var task = clientTest.Call_WebAPI_By_Resource_Owner_Password_Credentials_Grant();
task.Wait();
//var token = clientTest.GetAccessToken();
//var strToken = token.Result;
//Console.WriteLine(strToken);
Console.ReadLine();
}
结果如下：
其中长串字符为token，"value1, value2"为访问webapi返回的结果，表明访问成功。
参考1：http://www.cnblogs.com/xishuai/p/aspnet-webapi-owin-oauth2.html
参考2：http://www.cnblogs.com/Leo_wl/p/4919783.html