从Twitter API获取用户的电子邮件以进行外部登录身份验证ASP.NET MVC C#

Question

我已经检查了几个相关问题以找到我的问题的答案,但都无济于事.这个问题我们可以从Twitter oauth API获取电子邮件ID吗？让我获得Twitter支持以允许我的应用程序的权限如下: 使用此doc作为指南和标记答案的代码(稍微修改一下)

var resource_url = "https://api.twitter.com/1.1/account/verify_credentials.json";
var postBody = "include_email=true";//
resource_url += "?" + postBody;

生成签名并请求从Twitter获取用户的详细信息结果在我的MVC应用程序中401 Unauthorized.

但是,当我使用twitter签名生成器工具生成授权标头并使用fiddler向https://api.twitter.com/1.1/account/verify_credentials.json?include_email=true发出GET请求时,我收到了电子邮件只有一次,我必须在twitter中重新生成我的应用程序密钥才能再次获取它.

是否有关于如何生成有效签名并通过.Net TwitterAuthentication发出有效请求来检索Twitter用户电子邮件的文档？

Answer 1

几乎从我的头上拔出所有的头发后,我终于开始工作了.我发现Signature基本字符串与我的代码生成的字符串略有不同.经过一些小调整后,我能够生成有效的签名基本字符串.

在Startup.cs中,我添加了access_token和access_secret作为声明.我没有使用我的应用程序中找到的那个,因为用户在尝试登录或注册时需要调用新的:

var twitterOptions = new Microsoft.Owin.Security.Twitter.TwitterAuthenticationOptions()
{
   ConsumerKey = ConfigurationManager.AppSettings["consumer_key"],
   ConsumerSecret = ConfigurationManager.AppSettings["consumer_secret"],
   Provider = new Microsoft.Owin.Security.Twitter.TwitterAuthenticationProvider
   {
      OnAuthenticated = (context) =>
      {
         context.Identity.AddClaim(new System.Security.Claims.Claim("urn:twitter:access_token", context.AccessToken));
         context.Identity.AddClaim(new System.Security.Claims.Claim("urn:twitter:access_secret", context.AccessTokenSecret));
         return Task.FromResult(0);
      }
   },
   BackchannelCertificateValidator = new Microsoft.Owin.Security.CertificateSubjectKeyIdentifierValidator(new[]
   {
      "A5EF0B11CEC04103A34A659048B21CE0572D7D47", // VeriSign Class 3 Secure Server CA - G2
      "0D445C165344C1827E1D20AB25F40163D8BE79A5", // VeriSign Class 3 Secure Server CA - G3
      "7FD365A7C2DDECBBF03009F34339FA02AF333133", // VeriSign Class 3 Public Primary Certification Authority - G5
      "39A55D933676616E73A761DFA16A7E59CDE66FAD", // Symantec Class 3 Secure Server CA - G4
      "?add53f6680fe66e383cbac3e60922e3b4c412bed", // Symantec Class 3 EV SSL CA - G3
      "4eb6d578499b1ccf5f581ead56be3d9b6744a5e5", // VeriSign Class 3 Primary CA - G5
      "5168FF90AF0207753CCCD9656462A212B859723B", // DigiCert SHA2 High Assurance Server C?A 
      "B13EC36903F8BF4701D498261A0802EF63642BC3" // DigiCert High Assurance EV Root CA
    }),
    CallbackPath = new PathString("/twitter/account/ExternalLoginCallback")
};

 app.UseTwitterAuthentication(twitterOptions);

最后在我的控制器中,我只是打电话给我的助手类,从twitter获取名称和电子邮件:

    if (loginInfo.Login.LoginProvider.ToLower() == "twitter")
    {
        string access_token = loginInfo.ExternalIdentity.Claims.Where(x => x.Type == "urn:twitter:access_token").Select(x => x.Value).FirstOrDefault();
        string access_secret = loginInfo.ExternalIdentity.Claims.Where(x => x.Type == "urn:twitter:access_secret").Select(x => x.Value).FirstOrDefault();
        TwitterDto response = MyHelper.TwitterLogin(access_token, access_secret, ConfigurationManager.AppSettings["consumer_key"], ConfigurationManager.AppSettings["consumer_secret"]);
       // by now response.email should possess the email value you need
    }

助手类方法:

这是我为了提出有效请求而调整的部分:

baseString = string.Concat("GET&",Uri.EscapeDataString(resource_url)+"&"+ Uri.EscapeDataString(request_query),"%26",Uri.EscapeDataString(baseString));

public static TwitterDto TwitterLogin(string oauth_token, string oauth_token_secret, string oauth_consumer_key, string oauth_consumer_secret)
        {
            // oauth implementation details
            var oauth_version = "1.0";
            var oauth_signature_method = "HMAC-SHA1";

            // unique request details
            var oauth_nonce = Convert.ToBase64String(
                new ASCIIEncoding().GetBytes(DateTime.Now.Ticks.ToString()));
            var timeSpan = DateTime.UtcNow
                - new DateTime(1970, 1, 1, 0, 0, 0, 0, DateTimeKind.Utc);
            var oauth_timestamp = Convert.ToInt64(timeSpan.TotalSeconds).ToString();

            var resource_url = "https://api.twitter.com/1.1/account/verify_credentials.json";
            var request_query = "include_email=true";
            // create oauth signature
            var baseFormat = "oauth_consumer_key={0}&oauth_nonce={1}&oauth_signature_method={2}" +
                            "&oauth_timestamp={3}&oauth_token={4}&oauth_version={5}";

            var baseString = string.Format(baseFormat,
                                        oauth_consumer_key,
                                        oauth_nonce,
                                        oauth_signature_method,
                                        oauth_timestamp,
                                        oauth_token,
                                        oauth_version
                                        );

            baseString = string.Concat("GET&", Uri.EscapeDataString(resource_url) + "&" + Uri.EscapeDataString(request_query), "%26", Uri.EscapeDataString(baseString));

            var compositeKey = string.Concat(Uri.EscapeDataString(oauth_consumer_secret),
                                    "&", Uri.EscapeDataString(oauth_token_secret));

            string oauth_signature;
            using (HMACSHA1 hasher = new HMACSHA1(ASCIIEncoding.ASCII.GetBytes(compositeKey)))
            {
                oauth_signature = Convert.ToBase64String(
                    hasher.ComputeHash(ASCIIEncoding.ASCII.GetBytes(baseString)));
            }

            // create the request header
            var headerFormat = "OAuth oauth_consumer_key=\"{0}\", oauth_nonce=\"{1}\", oauth_signature=\"{2}\", oauth_signature_method=\"{3}\", oauth_timestamp=\"{4}\", oauth_token=\"{5}\", oauth_version=\"{6}\"";

            var authHeader = string.Format(headerFormat,
                                    Uri.EscapeDataString(oauth_consumer_key),
                                    Uri.EscapeDataString(oauth_nonce),
                                    Uri.EscapeDataString(oauth_signature),
                                    Uri.EscapeDataString(oauth_signature_method),
                                    Uri.EscapeDataString(oauth_timestamp),
                                    Uri.EscapeDataString(oauth_token),
                                    Uri.EscapeDataString(oauth_version)
                            );


            // make the request

            ServicePointManager.Expect100Continue = false;
            resource_url += "?include_email=true";
            HttpWebRequest request = (HttpWebRequest)WebRequest.Create(resource_url);
            request.Headers.Add("Authorization", authHeader);
            request.Method = "GET";

            WebResponse response = request.GetResponse();
            return JsonConvert.DeserializeObject<TwitterDto>(new StreamReader(response.GetResponseStream()).ReadToEnd());
        }
    }

    public class TwitterDto
    {
        public string name { get; set; }
        public string email { get; set; }
    }

这就是获取Twitter用户电子邮件所需的全部内容.我希望它可以帮助有人挣扎.请注意,问题中提到的步骤也非常重要.