我们目前正在开发一个应用程序，该应用程序使用 DotNetOpenAuth 库通过 OAuth 保护 wcf SOAP Web 服务。整个事情在IIS7上运行。Web 服务和 DotNetOpenAuth 库运行平稳，至少在 PC 上运行时是这样。但是，从 android 平台调用该服务会导致一些问题。有时它会运行得很好，有时它会导致异常说“序列不包含元素”。
不幸的是，我没有所有详细信息，因为我自己实际上没有可用的 android。但是，在阅读我的同事创建的日志文件时，有几件事很突出。
Windows 事件日志表明这是一个 KeyNotFoundException，这是因为令牌被识别（实际上，令牌存在于数据库中，所以这不应该发生 - 我已经检查过）。
此外，真正有趣的是，仅当 oauth_token 参数中出现 + 或 / 符号时才会发生此异常。我有点倾向于认为这是两个字符编码不正确的编码问题。检查 Windows 事件日志时，只要 oauth_token 参数包含 + 或 /，它就会被空格替换。但是我不知道这是在哪里编码的，为什么这两个字符被替换为空格，最重要的是现在，如何修复它。
我还启用了 log4net 日志记录，这表明 oauth_token 变量与数据库中的内容相同。但是，它确实显示构造的签名基本字符串包含 oauth_token，只有 / 字符被替换为 %252F。然而，在下面几行，oauth_token 变量是单独显示的（即不是作为基本字符串的一部分，而是在变量的摘要中），并且 / 实际上显示为 /。
对此问题的任何帮助将不胜感激。
编辑
从 log4net 检索的日志
2012-05-18 13:05:21,588 (GMT+2) [5] DEBUG DotNetOpenAuth.Messaging.Channel - Preparing to send UnauthorizedTokenResponse (1.0.1) message.
2012-05-18 13:05:22,099 (GMT+2) [5] DEBUG DotNetOpenAuth.Messaging.Bindings - Binding element DotNetOpenAuth.OAuth.ChannelElements.TokenHandlingBindingElement applied to message.
2012-05-18 13:05:22,100 (GMT+2) [5] DEBUG DotNetOpenAuth.Messaging.Bindings - Binding element DotNetOpenAuth.OAuth.ChannelElements.OAuthHttpMethodBindingElement did not apply to message.
2012-05-18 13:05:22,102 (GMT+2) [5] DEBUG DotNetOpenAuth.Messaging.Bindings - Binding element DotNetOpenAuth.Messaging.Bindings.StandardReplayProtectionBindingElement did not apply to message.
2012-05-18 13:05:22,104 (GMT+2) [5] DEBUG DotNetOpenAuth.Messaging.Bindings - Binding element DotNetOpenAuth.Messaging.Bindings.StandardExpirationBindingElement did not apply to message.
2012-05-18 13:05:22,109 (GMT+2) [5] DEBUG DotNetOpenAuth.Messaging.Bindings - Binding element DotNetOpenAuth.OAuth.ChannelElements.SigningBindingElementChain did not apply to message.
2012-05-18 13:05:22,113 (GMT+2) [5] INFO DotNetOpenAuth.Messaging.Channel - Prepared outgoing UnauthorizedTokenResponse (1.0.1) message for <response>:
oauth_token: LgelzDbE0hd8Z+HrRQWD63SzNA8=
oauth_token_secret: eK1sVTQvF6LrHqrtDGXe4LpLunI=
oauth_callback_confirmed: true
2012-05-18 13:05:22,113 (GMT+2) [5] DEBUG DotNetOpenAuth.Messaging.Channel - Sending message: UnauthorizedTokenResponse
2012-05-18 13:05:22,463 (GMT+2) [5] INFO DotNetOpenAuth.Messaging.Channel - Scanning incoming request for messages: https://websrv.hszuyd.nl/serviceprovider/v2/OAuth.ashx?oauth_token=LgelzDbE0hd8Z+HrRQWD63SzNA8=
2012-05-18 13:05:22,996 (GMT+2) [5] ERROR DotNetOpenAuth.OAuthServiceProvider - An unhandled exception occurred in ASP.NET processing: DotNetOpenAuth.Messaging.ProtocolException: A token in the message was not recognized by the service provider. ---> System.Collections.Generic.KeyNotFoundException: Unrecognized token ---> System.InvalidOperationException: Sequence contains no elements
at System.Data.Linq.SqlClient.SqlProvider.Execute(Expression query, QueryInfo queryInfo, IObjectReaderFactory factory, Object[] parentArgs, Object[] userArgs, ICompiledSubQuery[] subQueries, Object lastResult)
at System.Data.Linq.SqlClient.SqlProvider.ExecuteAll(Expression query, QueryInfo[] queryInfos, IObjectReaderFactory factory, Object[] userArguments, ICompiledSubQuery[] subQueries)
at System.Data.Linq.SqlClient.SqlProvider.System.Data.Linq.Provider.IProvider.Execute(Expression query)
at System.Data.Linq.Table`1.System.Linq.IQueryProvider.Execute[TResult](Expression expression)
at System.Linq.Queryable.First[TSource](IQueryable`1 source, Expression`1 predicate)
at OAuthServiceProvider.Code.DatabaseTokenManager.GetRequestToken(String token) in C:\Program Files\TimeTableWebService\sp\Code\DatabaseTokenManager.cs:line 31
--- End of inner exception stack trace ---
at OAuthServiceProvider.Code.DatabaseTokenManager.GetRequestToken(String token) in C:\Program Files\TimeTableWebService\sp\Code\DatabaseTokenManager.cs:line 35
at DotNetOpenAuth.OAuth.ChannelElements.OAuthServiceProviderMessageFactory.GetNewRequestMessage(MessageReceivingEndpoint recipient, IDictionary`2 fields) in c:\BuildAgent\work\a02b428f36957bca\src\DotNetOpenAuth\OAuth\ChannelElements\OAuthServiceProviderMessageFactory.cs:line 80
--- End of inner exception stack trace ---
at DotNetOpenAuth.OAuth.ChannelElements.OAuthServiceProviderMessageFactory.GetNewRequestMessage(MessageReceivingEndpoint recipient, IDictionary`2 fields) in c:\BuildAgent\work\a02b428f36957bca\src\DotNetOpenAuth\OAuth\ChannelElements\OAuthServiceProviderMessageFactory.cs:line 100
at OAuthServiceProvider.Code.CustomOAuthMessageFactory.GetNewRequestMessage(MessageReceivingEndpoint recipient, IDictionary`2 fields) in C:\Program Files\TimeTableWebService\sp\Code\CustomOAuthTypeProvider.cs:line 24
at DotNetOpenAuth.Messaging.Channel.Receive(Dictionary`2 fields, MessageReceivingEndpoint recipient) in c:\BuildAgent\work\a02b428f36957bca\src\DotNetOpenAuth\Messaging\Channel.cs:line 713
at DotNetOpenAuth.OAuth.ChannelElements.OAuthChannel.ReadFromRequestCore(HttpRequestInfo request) in c:\BuildAgent\work\a02b428f36957bca\src\DotNetOpenAuth\OAuth\ChannelElements\OAuthChannel.cs:line 194
at DotNetOpenAuth.Messaging.Channel.ReadFromRequest(HttpRequestInfo httpRequest) in c:\BuildAgent\work\a02b428f36957bca\src\DotNetOpenAuth\Messaging\Channel.cs:line 422
at OAuth.ProcessRequest(HttpContext context) in d:\oauthSiteTest\serviceprovider\v2\OAuth.ashx:line 21
at System.Web.HttpApplication.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute()
at System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously)
DotNetOpenAuth.Messaging.ProtocolException: A token in the message was not recognized by the service provider. ---> System.Collections.Generic.KeyNotFoundException: Unrecognized token ---> System.InvalidOperationException: Sequence contains no elements
at System.Data.Linq.SqlClient.SqlProvider.Execute(Expression query, QueryInfo queryInfo, IObjectReaderFactory factory, Object[] parentArgs, Object[] userArgs, ICompiledSubQuery[] subQueries, Object lastResult)
at System.Data.Linq.SqlClient.SqlProvider.ExecuteAll(Expression query, QueryInfo[] queryInfos, IObjectReaderFactory factory, Object[] userArguments, ICompiledSubQuery[] subQueries)
at System.Data.Linq.SqlClient.SqlProvider.System.Data.Linq.Provider.IProvider.Execute(Expression query)
at System.Data.Linq.Table`1.System.Linq.IQueryProvider.Execute[TResult](Expression expression)
at System.Linq.Queryable.First[TSource](IQueryable`1 source, Expression`1 predicate)
at OAuthServiceProvider.Code.DatabaseTokenManager.GetRequestToken(String token) in C:\Program Files\TimeTableWebService\sp\Code\DatabaseTokenManager.cs:line 31
--- End of inner exception stack trace ---
at OAuthServiceProvider.Code.DatabaseTokenManager.GetRequestToken(String token) in C:\Program Files\TimeTableWebService\sp\Code\DatabaseTokenManager.cs:line 35
at DotNetOpenAuth.OAuth.ChannelElements.OAuthServiceProviderMessageFactory.GetNewRequestMessage(MessageReceivingEndpoint recipient, IDictionary`2 fields) in c:\BuildAgent\work\a02b428f36957bca\src\DotNetOpenAuth\OAuth\ChannelElements\OAuthServiceProviderMessageFactory.cs:line 80
--- End of inner exception stack trace ---
at DotNetOpenAuth.OAuth.ChannelElements.OAuthServiceProviderMessageFactory.GetNewRequestMessage(MessageReceivingEndpoint recipient, IDictionary`2 fields) in c:\BuildAgent\work\a02b428f36957bca\src\DotNetOpenAuth\OAuth\ChannelElements\OAuthServiceProviderMessageFactory.cs:line 100
at OAuthServiceProvider.Code.CustomOAuthMessageFactory.GetNewRequestMessage(MessageReceivingEndpoint recipient, IDictionary`2 fields) in C:\Program Files\TimeTableWebService\sp\Code\CustomOAuthTypeProvider.cs:line 24
at DotNetOpenAuth.Messaging.Channel.Receive(Dictionary`2 fields, MessageReceivingEndpoint recipient) in c:\BuildAgent\work\a02b428f36957bca\src\DotNetOpenAuth\Messaging\Channel.cs:line 713
at DotNetOpenAuth.OAuth.ChannelElements.OAuthChannel.ReadFromRequestCore(HttpRequestInfo request) in c:\BuildAgent\work\a02b428f36957bca\src\DotNetOpenAuth\OAuth\ChannelElements\OAuthChannel.cs:line 194
at DotNetOpenAuth.Messaging.Channel.ReadFromRequest(HttpRequestInfo httpRequest) in c:\BuildAgent\work\a02b428f36957bca\src\DotNetOpenAuth\Messaging\Channel.cs:line 422
at OAuth.ProcessRequest(HttpContext context) in d:\oauthSiteTest\serviceprovider\v2\OAuth.ashx:line 21
at System.Web.HttpApplication.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute()
at System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously)
2012-05-18 13:05:27,382 (GMT+2) [6] DEBUG DotNetOpenAuth.Messaging.Channel - Preparing to send UnauthorizedTokenResponse (1.0.1) message.
2012-05-18 13:05:27,430 (GMT+2) [6] DEBUG DotNetOpenAuth.Messaging.Bindings - Binding element DotNetOpenAuth.OAuth.ChannelElements.TokenHandlingBindingElement applied to message.
2012-05-18 13:05:27,430 (GMT+2) [6] DEBUG DotNetOpenAuth.Messaging.Bindings - Binding element DotNetOpenAuth.OAuth.ChannelElements.OAuthHttpMethodBindingElement did not apply to message.
2012-05-18 13:05:27,430 (GMT+2) [6] DEBUG DotNetOpenAuth.Messaging.Bindings - Binding element DotNetOpenAuth.Messaging.Bindings.StandardReplayProtectionBindingElement did not apply to message.
2012-05-18 13:05:27,430 (GMT+2) [6] DEBUG DotNetOpenAuth.Messaging.Bindings - Binding element DotNetOpenAuth.Messaging.Bindings.StandardExpirationBindingElement did not apply to message.
2012-05-18 13:05:27,430 (GMT+2) [6] DEBUG DotNetOpenAuth.Messaging.Bindings - Binding element DotNetOpenAuth.OAuth.ChannelElements.SigningBindingElementChain did not apply to message.
2012-05-18 13:05:27,430 (GMT+2) [6] INFO DotNetOpenAuth.Messaging.Channel - Prepared outgoing UnauthorizedTokenResponse (1.0.1) message for <response>:
oauth_token: tdKwMhsNOyQPTiz+K5th/RZr0F8=
oauth_token_secret: UtfdLNG0VqrTGinchsNfjbyFBtE=
oauth_callback_confirmed: true
2012-05-18 13:05:27,430 (GMT+2) [6] DEBUG DotNetOpenAuth.Messaging.Channel - Sending message: UnauthorizedTokenResponse
2012-05-18 13:05:27,503 (GMT+2) [6] INFO DotNetOpenAuth.Messaging.Channel - Scanning incoming request for messages: https://websrv.hszuyd.nl/serviceprovider/v2/OAuth.ashx?oauth_token=tdKwMhsNOyQPTiz+K5th/RZr0F8=
2012-05-18 13:05:27,512 (GMT+2) [6] ERROR DotNetOpenAuth.OAuthServiceProvider - An unhandled exception occurred in ASP.NET processing: DotNetOpenAuth.Messaging.ProtocolException: A token in the message was not recognized by the service provider. ---> System.Collections.Generic.KeyNotFoundException: Unrecognized token ---> System.InvalidOperationException: Sequence contains no elements
at System.Data.Linq.SqlClient.SqlProvider.Execute(Expression query, QueryInfo queryInfo, IObjectReaderFactory factory, Object[] parentArgs, Object[] userArgs, ICompiledSubQuery[] subQueries, Object lastResult)
at System.Data.Linq.SqlClient.SqlProvider.ExecuteAll(Expression query, QueryInfo[] queryInfos, IObjectReaderFactory factory, Object[] userArguments, ICompiledSubQuery[] subQueries)
at System.Data.Linq.SqlClient.SqlProvider.System.Data.Linq.Provider.IProvider.Execute(Expression query)
at System.Data.Linq.Table`1.System.Linq.IQueryProvider.Execute[TResult](Expression expression)
at System.Linq.Queryable.First[TSource](IQueryable`1 source, Expression`1 predicate)
at OAuthServiceProvider.Code.DatabaseTokenManager.GetRequestToken(String token) in C:\Program Files\TimeTableWebService\sp\Code\DatabaseTokenManager.cs:line 31
--- End of inner exception stack trace ---
at OAuthServiceProvider.Code.DatabaseTokenManager.GetRequestToken(String token) in C:\Program Files\TimeTableWebService\sp\Code\DatabaseTokenManager.cs:line 35
at DotNetOpenAuth.OAuth.ChannelElements.OAuthServiceProviderMessageFactory.GetNewRequestMessage(MessageReceivingEndpoint recipient, IDictionary`2 fields) in c:\BuildAgent\work\a02b428f36957bca\src\DotNetOpenAuth\OAuth\ChannelElements\OAuthServiceProviderMessageFactory.cs:line 80
--- End of inner exception stack trace ---
at DotNetOpenAuth.OAuth.ChannelElements.OAuthServiceProviderMessageFactory.GetNewRequestMessage(MessageReceivingEndpoint recipient, IDictionary`2 fields) in c:\BuildAgent\work\a02b428f36957bca\src\DotNetOpenAuth\OAuth\ChannelElements\OAuthServiceProviderMessageFactory.cs:line 100
at OAuthServiceProvider.Code.CustomOAuthMessageFactory.GetNewRequestMessage(MessageReceivingEndpoint recipient, IDictionary`2 fields) in C:\Program Files\TimeTableWebService\sp\Code\CustomOAuthTypeProvider.cs:line 24
at DotNetOpenAuth.Messaging.Channel.Receive(Dictionary`2 fields, MessageReceivingEndpoint recipient) in c:\BuildAgent\work\a02b428f36957bca\src\DotNetOpenAuth\Messaging\Channel.cs:line 713
at DotNetOpenAuth.OAuth.ChannelElements.OAuthChannel.ReadFromRequestCore(HttpRequestInfo request) in c:\BuildAgent\work\a02b428f36957bca\src\DotNetOpenAuth\OAuth\ChannelElements\OAuthChannel.cs:line 194
at DotNetOpenAuth.Messaging.Channel.ReadFromRequest(HttpRequestInfo httpRequest) in c:\BuildAgent\work\a02b428f36957bca\src\DotNetOpenAuth\Messaging\Channel.cs:line 422
at OAuth.ProcessRequest(HttpContext context) in d:\oauthSiteTest\serviceprovider\v2\OAuth.ashx:line 21
at System.Web.HttpApplication.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute()
at System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously)
DotNetOpenAuth.Messaging.ProtocolException: A token in the message was not recognized by the service provider. ---> System.Collections.Generic.KeyNotFoundException: Unrecognized token ---> System.InvalidOperationException: Sequence contains no elements
at System.Data.Linq.SqlClient.SqlProvider.Execute(Expression query, QueryInfo queryInfo, IObjectReaderFactory factory, Object[] parentArgs, Object[] userArgs, ICompiledSubQuery[] subQueries, Object lastResult)
at System.Data.Linq.SqlClient.SqlProvider.ExecuteAll(Expression query, QueryInfo[] queryInfos, IObjectReaderFactory factory, Object[] userArguments, ICompiledSubQuery[] subQueries)
at System.Data.Linq.SqlClient.SqlProvider.System.Data.Linq.Provider.IProvider.Execute(Expression query)
at System.Data.Linq.Table`1.System.Linq.IQueryProvider.Execute[TResult](Expression expression)
at System.Linq.Queryable.First[TSource](IQueryable`1 source, Expression`1 predicate)
at OAuthServiceProvider.Code.DatabaseTokenManager.GetRequestToken(String token) in C:\Program Files\TimeTableWebService\sp\Code\DatabaseTokenManager.cs:line 31
--- End of inner exception stack trace ---
at OAuthServiceProvider.Code.DatabaseTokenManager.GetRequestToken(String token) in C:\Program Files\TimeTableWebService\sp\Code\DatabaseTokenManager.cs:line 35
at DotNetOpenAuth.OAuth.ChannelElements.OAuthServiceProviderMessageFactory.GetNewRequestMessage(MessageReceivingEndpoint recipient, IDictionary`2 fields) in c:\BuildAgent\work\a02b428f36957bca\src\DotNetOpenAuth\OAuth\ChannelElements\OAuthServiceProviderMessageFactory.cs:line 80
--- End of inner exception stack trace ---
at DotNetOpenAuth.OAuth.ChannelElements.OAuthServiceProviderMessageFactory.GetNewRequestMessage(MessageReceivingEndpoint recipient, IDictionary`2 fields) in c:\BuildAgent\work\a02b428f36957bca\src\DotNetOpenAuth\OAuth\ChannelElements\OAuthServiceProviderMessageFactory.cs:line 100
at OAuthServiceProvider.Code.CustomOAuthMessageFactory.GetNewRequestMessage(MessageReceivingEndpoint recipient, IDictionary`2 fields) in C:\Program Files\TimeTableWebService\sp\Code\CustomOAuthTypeProvider.cs:line 24
at DotNetOpenAuth.Messaging.Channel.Receive(Dictionary`2 fields, MessageReceivingEndpoint recipient) in c:\BuildAgent\work\a02b428f36957bca\src\DotNetOpenAuth\Messaging\Channel.cs:line 713
at DotNetOpenAuth.OAuth.ChannelElements.OAuthChannel.ReadFromRequestCore(HttpRequestInfo request) in c:\BuildAgent\work\a02b428f36957bca\src\DotNetOpenAuth\OAuth\ChannelElements\OAuthChannel.cs:line 194
at DotNetOpenAuth.Messaging.Channel.ReadFromRequest(HttpRequestInfo httpRequest) in c:\BuildAgent\work\a02b428f36957bca\src\DotNetOpenAuth\Messaging\Channel.cs:line 422
at OAuth.ProcessRequest(HttpContext context) in d:\oauthSiteTest\serviceprovider\v2\OAuth.ashx:line 21
at System.Web.HttpApplication.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute()
at System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously)
2012-05-18 13:05:30,486 (GMT+2) [5] INFO DotNetOpenAuth.Messaging.Channel - Scanning incoming request for messages: https://websrv.hszuyd.nl/serviceprovider/v2/OAuth.ashx
2012-05-18 13:05:30,487 (GMT+2) [5] DEBUG DotNetOpenAuth.Messaging.Channel - Incoming request received: RequestScopedTokenMessage
2012-05-18 13:05:30,487 (GMT+2) [5] INFO DotNetOpenAuth.Messaging.Channel - Processing incoming RequestScopedTokenMessage (1.0.1) message:
scope: http://tempuri.org/DataApi/retrieveTimeTable
oauth_callback: x-oauthflow://callback/
oauth_consumer_key: sampleconsumer
oauth_nonce: 913320039
oauth_signature_method: HMAC-SHA1
oauth_signature: yfPMlcFo6/NgJltyCLc++RMyQCY=
oauth_version: 1.0
oauth_timestamp: 1337339130