如何获取Facebook的用户信息的ASP.NET Web API 2
问题描述:
我想注册一个用户,通过外部供应商(如Facebook),为了得到我需要的信息,我配置FacebookProvider如下如何获取Facebook的用户信息的ASP.NET Web API 2
var options = new FacebookAuthenticationOptions {
AppId = "***",
AppSecret = "***",
Scope = { "email" },
Provider = new FacebookAuthenticationProvider {
OnAuthenticated = (context) => {
foreach (var x in context.User)
{
var claimType = string.Format("urn:facebook:{0}", x.Key);
string claimValue = x.Value.ToString();
if (!context.Identity.HasClaim(claimType, claimValue))
context.Identity.AddClaim(new System.Security.Claims.Claim(claimType, claimValue, XmlSchemaString, "Facebook"));
}
return Task.FromResult(0);
}
}
};
options.Fields.Add("id");
options.Fields.Add("name");
options.Fields.Add("email");
options.SignInAsAuthenticationType = DefaultAuthenticationTypes.ExternalBearer;
app.UseFacebookAuthentication(options);
在OnAuthenticated调试时我看到所有的必填字段,但是当我打电话RegisterExternal从邮递员如下PIC
GetExternalLoginInfoAsync返回null
var info = await Authentication.GetExternalLoginInfoAsync();
if (info == null)
{
return InternalServerError();
}
那么如何检索邮件等查询字段?我认为所有必要的信息都存储在cookie中,但是如何将它们传输到服务器并提取Identity实例?
所有的nuget包已经更新到最新版本
p.s.我计划从iOS应用程序使用API
答
我找到了解决方案。
改变ExternalLoginData类如下
private class ExternalLoginData
{
...
// here added new field
public IList<Claim> Claims { get; private set; }
public static ExternalLoginData FromIdentity(ClaimsIdentity identity)
{
...
return new ExternalLoginData
{
...
// here added claims setting
Claims = identity.Claims.ToList()
};
}
}
改变ExternalLogin回调如下
public async Task<IHttpActionResult> GetExternalLogin(string provider, string error = null)
{
...
if (hasRegistered)
{
...
}
else
{
// here replaced getting claims by Claims field
IEnumerable<Claim> claims = externalLogin.Claims;
//IEnumerable<Claim> claims = externalLogin.GetClaims();
ClaimsIdentity identity = new ClaimsIdentity(claims, OAuthDefaults.AuthenticationType);
Authentication.SignIn(identity);
}
return Ok();
}
我们收到的承载令牌的结果。从中提取身份我们会收到先前保存的声明。