访问其他Twitter用户信息
我正在使用Azure移动服务来授权用户，现在我正在尝试从提供商处获取其他用户信息。 除了Twitter之外，我还为所有人工作。 要对所有其他人进行身份validation，我使用类似于此的内容：
var identities = await user.GetIdentitiesAsync(); var result = new JObject(); var fb = identities.OfType().FirstOrDefault(); if (fb != null) { var accessToken = fb.AccessToken; result.Add("facebook", await GetProviderInfo("https://graph.facebook.com/me?access_token=" + accessToken)); } 我可以做这样的事情：
var tw = identities.OfType().FirstOrDefault(); if (tw != null) { var accessToken = tw.AccessToken; var accessTokenSecret = tw.AccessTokenSecret; result.Add("twitter", await GetProviderInfo("https://api.twitter.com/1.1/account/verify_credentials.json?token=" + accessToken + "&token_secret=" + accessTokenSecret + "&consumer_key=***************" + "&consumer_secret=******************************")); }
或者我必须做一些完全不同的事情？
Woops，刚刚在这里发现了类似的问题： Twitter单个url请求
是的，这是可能的，但它比其他提供商更多的工作。
这是你的api控制器的代码（可能需要一些重构）
[HttpPost] [Route("current/identity")] public async Task GetIdentityInfo() { var currentUser = User as ServiceUser; if (currentUser != null) { var identities = await currentUser.GetIdentitiesAsync(); var googleCredentials = identities.OfType().FirstOrDefault(); if (googleCredentials != null) { var infos = await GetGoolgeDetails(googleCredentials); return Request.CreateResponse(HttpStatusCode.OK, infos); } var facebookCredentials = identities.OfType().FirstOrDefault(); if (facebookCredentials!= null) { var infos = await GetFacebookDetails(facebookCredentials); return Request.CreateResponse(HttpStatusCode.OK, infos); } var microsoftCredentials = identities.OfType().FirstOrDefault(); if (microsoftCredentials != null) { var infos = await GetMicrosoftDetails(microsoftCredentials); return Request.CreateResponse(HttpStatusCode.OK, infos); } var twitterCredentials = identities.OfType().FirstOrDefault(); if (twitterCredentials != null) { var infos = await GetTwitterDetails(currentUser, twitterCredentials); return Request.CreateResponse(HttpStatusCode.OK, infos); } } return Request.CreateResponse(HttpStatusCode.OK); } private async Task GetTwitterDetails(ServiceUser currentUser, TwitterCredentials twitterCredentials) { var twitterId = currentUser.Id.Split(':').Last(); var accessToken = twitterCredentials.AccessToken; string consumerKey = ConfigurationManager.AppSettings["MS_TwitterConsumerKey"]; string consumerSecret = ConfigurationManager.AppSettings["MS_TwitterConsumerSecret"]; // Add this setting manually on your Azure Mobile Services Management interface. // You will find the secret on your twitter app configuration string accessTokenSecret = ConfigurationManager.AppSettings["FG_TwitterAccessTokenSecret"]; var parameters = new Dictionary(); parameters.Add("user_id", twitterId); parameters.Add("oauth_token", accessToken); parameters.Add("oauth_consumer_key", consumerKey); OAuth1 oauth = new OAuth1(); string headerString = oauth.GetAuthorizationHeaderString( "GET", "https://api.twitter.com/1.1/users/show.json", parameters, consumerSecret, accessTokenSecret); var infos = await GetProviderInfo("https://api.twitter.com/1.1/users/show.json?user_id=" + twitterId, headerString); return infos; } private async Task GetMicrosoftDetails(MicrosoftAccountCredentials microsoftCredentials) { var accessToken = microsoftCredentials.AccessToken; var infos = await GetProviderInfo("https://apis.live.net/v5.0/me/?method=GET&access_token=" + accessToken); return infos; } private async Task GetFacebookDetails(FacebookCredentials facebookCredentials) { var accessToken = facebookCredentials.AccessToken; var infos = await GetProviderInfo("https://graph.facebook.com/me?access_token=" + accessToken); return infos; } private async Task GetGoolgeDetails(GoogleCredentials googleCredentials) { var accessToken = googleCredentials.AccessToken; var infos = await GetProviderInfo("https://www.googleapis.com/oauth2/v3/userinfo?access_token=" + accessToken); return infos; } private async Task GetProviderInfo(string url, string oauth1HeaderString = null) { using (var client = new HttpClient()) { if (oauth1HeaderString != null) { client.DefaultRequestHeaders.Authorization = System.Net.Http.Headers.AuthenticationHeaderValue.Parse(oauth1HeaderString); } var resp = await client.GetAsync(url).ConfigureAwait(false); resp.EnsureSuccessStatusCode(); string rawInfo = await resp.Content.ReadAsStringAsync().ConfigureAwait(false); return JToken.Parse(rawInfo); } }
然后，您需要此类来构建有效的OAuth 1.0身份validation标头：
（几乎所有以下代码都来自LinqToTwitter， https： //linqtotwitter.codeplex.com）
public class OAuth1 { const string OAUTH_VERSION = "1.0"; const string SIGNATURE_METHOD = "HMAC-SHA1"; const long UNIX_EPOC_TICKS = 621355968000000000L; public string GetAuthorizationHeaderString(string method, string url, IDictionary parameters, string consumerSecret, string accessTokenSecret) { string encodedAndSortedString = BuildEncodedSortedString(parameters); string signatureBaseString = BuildSignatureBaseString(method, url, encodedAndSortedString); string signingKey = BuildSigningKey(consumerSecret, accessTokenSecret); string signature = CalculateSignature(signingKey, signatureBaseString); string authorizationHeader = BuildAuthorizationHeaderString(encodedAndSortedString, signature); return authorizationHeader; } internal void AddMissingOAuthParameters(IDictionary parameters) { if (!parameters.ContainsKey("oauth_timestamp")) parameters.Add("oauth_timestamp", GetTimestamp()); if (!parameters.ContainsKey("oauth_nonce")) parameters.Add("oauth_nonce", GenerateNonce()); if (!parameters.ContainsKey("oauth_version")) parameters.Add("oauth_version", OAUTH_VERSION); if (!parameters.ContainsKey("oauth_signature_method")) parameters.Add("oauth_signature_method", SIGNATURE_METHOD); } internal string BuildEncodedSortedString(IDictionary parameters) { AddMissingOAuthParameters(parameters); return string.Join("&", (from parm in parameters orderby parm.Key select parm.Key + "=" + PercentEncode(parameters[parm.Key])) .ToArray()); } internal virtual string BuildSignatureBaseString(string method, string url, string encodedStringParameters) { int paramsIndex = url.IndexOf('?'); string urlWithoutParams = paramsIndex >= 0 ? url.Substring(0, paramsIndex) : url; return string.Join("&", new string[] { method.ToUpper(), PercentEncode(urlWithoutParams), PercentEncode(encodedStringParameters) }); } internal virtual string BuildSigningKey(string consumerSecret, string accessTokenSecret) { return string.Format( CultureInfo.InvariantCulture, "{0}&{1}", PercentEncode(consumerSecret), PercentEncode(accessTokenSecret)); } internal virtual string CalculateSignature(string signingKey, string signatureBaseString) { byte[] key = Encoding.UTF8.GetBytes(signingKey); byte[] msg = Encoding.UTF8.GetBytes(signatureBaseString); KeyedHashAlgorithm hasher = new HMACSHA1(); hasher.Key = key; byte[] hash = hasher.ComputeHash(msg); return Convert.ToBase64String(hash); } internal virtual string BuildAuthorizationHeaderString(string encodedAndSortedString, string signature) { string[] allParms = (encodedAndSortedString + "&oauth_signature=" + PercentEncode(signature)).Split('&'); string allParmsString = string.Join(", ", (from parm in allParms let keyVal = parm.Split('=') where parm.StartsWith("oauth") || parm.StartsWith("x_auth") orderby keyVal[0] select keyVal[0] + "=\"" + keyVal[1] + "\"") .ToList()); return "OAuth " + allParmsString; } internal virtual string GetTimestamp() { long ticksSinceUnixEpoc = DateTime.UtcNow.Ticks - UNIX_EPOC_TICKS; double secondsSinceUnixEpoc = new TimeSpan(ticksSinceUnixEpoc).TotalSeconds; return Math.Floor(secondsSinceUnixEpoc).ToString(CultureInfo.InvariantCulture); } internal virtual string GenerateNonce() { return new Random().Next(111111, 9999999).ToString(CultureInfo.InvariantCulture); } internal virtual string PercentEncode(string value) { const string ReservedChars = @"`!@#$^&*()+=,:;'?/|\[] "; var result = new StringBuilder(); if (string.IsNullOrWhiteSpace(value)) return string.Empty; var escapedValue = Uri.EscapeDataString(value); // Windows Phone doesn't escape all the ReservedChars properly, so we have to do it manually. foreach (char symbol in escapedValue) { if (ReservedChars.IndexOf(symbol) != -1) { result.Append('%' + String.Format("{0:X2}", (int)symbol).ToUpper()); } else { result.Append(symbol); } } return result.ToString(); } }