我想在我的 Facebook 应用程序上使用“需要应用程序密钥”（服务器 API 调用需要应用程序密钥），
但如果我这样做 - 我会收到以下错误：
（GraphMethodException - #100）未指定 appsecret_proof 参数
描述：执行当前 Web 请求期间发生未处理的异常。请查看堆栈跟踪以获取有关错误及其在代码中的来源的更多信息。
异常详细信息：Facebook.FacebookApiException：（GraphMethodException - #100）未指定 appsecret_proof 参数
来源错误：
第 801 行：var fb = new FacebookClient(accessToken);
802 号线：
803号线：动态 facebookInfo = fb.Get("/me?appsecret_proof=" + fb.AppSecret + "&fields=电子邮件、生日、性别");第 804 行：signInInfo.Email = facebookInfo.email;
805号线：
I saw 这个帖子 https://stackoverflow.com/questions/20572523/c-sharp-help-required-to-create-facebook-appsecret-proof-hmacsha256，所以我想了解如何发送它...我需要切换到 fb.Post 吗？
另外，我想知道SDK是否还没有类似“GenereateFaceBookSecret()”的东西
提前致谢。
解决了！最后...并使用新的 facebook API v2.4
所以也许我可以节省其他人 6 个小时:-)
我创建了这个小助手类：
namespace YouProjectNamespace.Helpers
{
using System.Security.Cryptography;
using System.Text;
/// <summary>
/// Facebook Helper
/// </summary>
public static class FacebookHelper
{
/// <summary>
/// Generate a facebook secret proof (works with facebook APIs v2.4)
/// <seealso cref="http://stackoverflow.com/questions/20572523/c-sharp-help-required-to-create-facebook-appsecret-proof-hmacsha256"/>
/// </summary>
/// <param name="facebookAccessToken"></param>
/// <param name="facebookAuthAppSecret"></param>
/// <returns></returns>
public static string GenerateFacebookSecretProof(string facebookAccessToken, string facebookAuthAppSecret)
{
byte[] keyBytes = Encoding.UTF8.GetBytes(facebookAuthAppSecret);
byte[] messageBytes = Encoding.UTF8.GetBytes(facebookAccessToken);
HMACSHA256 hmacsha256 = new HMACSHA256(keyBytes);
byte[] hash = hmacsha256.ComputeHash(messageBytes);
StringBuilder sbHash = new StringBuilder();
for (int i = 0; i < hash.Length; i++)
{
sbHash.Append(hash[i].ToString("x2"));
}
return sbHash.ToString();
}
}
}
这是如何使用它：
// Use Facebook SDK for .NET to get more specific data (https://github.com/facebook-csharp-sdk/facebook-csharp-sdk)
var identity = AuthenticationManager.GetExternalIdentity(DefaultAuthenticationTypes.ExternalCookie);
var facebookAccessToken = identity.FindFirstValue("FacebookAccessToken");
var fb = new FacebookClient(facebookAccessToken);
var facebookAuthAppSecret = "Use_Your_Own_Facebook_AppSecret_Here";
var facebookAppSecretProof = FacebookHelper.GenerateFacebookSecretProof(facebookAccessToken, facebookAuthAppSecret);
dynamic facebookInfo = fb.Get(string.Format("/me?appsecret_proof={0}&fields=email,birthday,gender", facebookAppSecretProof));
signInInfo.Email = facebookInfo.email;
我应该补充一点，为了使用 facebook SDK，应该添加一个声明，
这就是我在 Startup.Auth.cs 中的内容
#region Facebook
// https://developers.facebook.com/apps
// https://developers.facebook.com/docs/facebook-login/permissions/v2.4
// https://developers.facebook.com/docs/graph-api/reference/v2.4/post
// https://developers.facebook.com/docs/apps/changelog#v2_4
// https://developers.facebook.com/docs/graph-api/reference/user
var facebookAuthOptions = new FacebookAuthenticationOptions();
facebookAuthOptions.AppId = facebookAuthAppId;
facebookAuthOptions.AppSecret = facebookAuthAppSecret;
facebookAuthOptions.SendAppSecretProof = true;
// public_profile (Default) includes: id,name,first_name,last_name,age_range,link,gender,locale,timezone,updated_time,verified
facebookAuthOptions.Scope.Add("public_profile");
facebookAuthOptions.Scope.Add("email");
facebookAuthOptions.Scope.Add("user_birthday");
facebookAuthOptions.Scope.Add("user_location"); // current city through the location field on the User object
facebookAuthOptions.Provider = new FacebookAuthenticationProvider()
{
OnAuthenticated = (context) =>
{
// http://stackoverflow.com/questions/7999934/facebook-c-sharp-sdk-problems-getting-user-email/8013211#8013211
// http://blogs.msdn.com/b/webdev/archive/2013/10/16/get-more-information-from-social-providers-used-in-the-vs-2013-project-templates.aspx
// Get the access token from FB and store it in the database and use FacebookC# SDK to get more information about the user
context.Identity.AddClaim(new System.Security.Claims.Claim("FacebookAccessToken", context.AccessToken));
var expiryDuration = context.ExpiresIn ?? new TimeSpan();
context.Identity.AddClaim(new Claim("facebook:expires_in", DateTime.UtcNow.Add(expiryDuration).ToString(CultureInfo.InvariantCulture)));
// Add all other available claims
foreach (var claim in context.User)
{
var claimType = string.Format("facebook:{0}", claim.Key);
var claimValue = claim.Value.ToString();
if (!context.Identity.HasClaim(claimType, claimValue))
context.Identity.AddClaim(new System.Security.Claims.Claim(claimType, claimValue, "XmlSchemaString", "Facebook"));
}
return Task.FromResult(0);
}
};
app.UseFacebookAuthentication(facebookAuthOptions);
#endregion Facebook
本文内容由网友自发贡献，版权归原作者所有，本站不承担相应法律责任。如您发现有涉嫌抄袭侵权的内容，请联系:hwhale#tublm.com(使用前将#替换为@)
