我在下面从 C# 转换为 VB.NET 的代码中遇到以下错误（原始代码可以在此处找到：https://developer.linkedin.com/sites/default/files/LinkedInAuth.rar.zip https://developer.linkedin.com/sites/default/files/LinkedInAuth.rar.zip):
“QueryParameterComparer”类必须为接口“System.Collections.Generic.IComparer(Of QueryParameter)”实现“Function Compare(x As oAuthBase2.QueryParameter, y As oAuthBase2.QueryParameter) As Integer”。
我到底需要改变什么？
'
' 此文件由 Fatih YASAR 于 2009 年 11 月 27 日修改
'
Imports System.Security.Cryptography
Imports System.Collections.Generic
Imports System.Text
Imports System.Web
Public Class oAuthBase2
''' <summary>
''' Provides a predefined set of algorithms that are supported officially by the protocol
''' </summary>
Public Enum SignatureTypes
HMACSHA1
PLAINTEXT
RSASHA1
End Enum
''' <summary>
''' Provides an internal structure to sort the query parameter
''' </summary>
Protected Class QueryParameter
Private m_name As String = Nothing
Private m_value As String = Nothing
Public Sub New(ByVal name As String, ByVal value As String)
Me.m_name = name
Me.m_value = value
End Sub
Public ReadOnly Property Name() As String
Get
Return m_name
End Get
End Property
Public ReadOnly Property Value() As String
Get
Return m_value
End Get
End Property
End Class
Protected Class QueryParameterComparer
Implements System.Collections.Generic.IComparer(Of oAuthBase2.QueryParameter)
#Region "IComparer<QueryParameter> Members"
Public Function Compare(ByVal x As oAuthBase2.QueryParameter, ByVal y As oAuthBase2.QueryParameter) As Integer
If x.Name = y.Name Then
Return String.Compare(x.Value, y.Value)
Else
Return String.Compare(x.Name, y.Name)
End If
End Function
#End Region
End Class
Protected Const OAuthVersion As String = "1.0"
Protected Const OAuthParameterPrefix As String = "oauth_"
'
' List of know and used oauth parameters' names
'
Protected Const OAuthConsumerKeyKey As String = "oauth_consumer_key"
Protected Const OAuthCallbackKey As String = "oauth_callback"
Protected Const OAuthVersionKey As String = "oauth_version"
Protected Const OAuthSignatureMethodKey As String = "oauth_signature_method"
Protected Const OAuthSignatureKey As String = "oauth_signature"
Protected Const OAuthTimestampKey As String = "oauth_timestamp"
Protected Const OAuthNonceKey As String = "oauth_nonce"
Protected Const OAuthTokenKey As String = "oauth_token"
Protected Const oAauthVerifier As String = "oauth_verifier"
Protected Const OAuthTokenSecretKey As String = "oauth_token_secret"
Protected Const HMACSHA1SignatureType As String = "HMAC-SHA1"
Protected Const PlainTextSignatureType As String = "PLAINTEXT"
Protected Const RSASHA1SignatureType As String = "RSA-SHA1"
Protected random As New Random()
Private oauth_verifier As String
Public Property Verifier() As String
Get
Return oauth_verifier
End Get
Set(ByVal value As String)
oauth_verifier = value
End Set
End Property
Protected unreservedChars As String = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789-_.~"
''' <summary>
''' Helper function to compute a hash value
''' </summary>
''' <param name="hashAlgorithm">The hashing algoirhtm used. If that algorithm needs some initialization, like HMAC and its derivatives, they should be initialized prior to passing it to this function</param>
''' <param name="data">The data to hash</param>
''' <returns>a Base64 string of the hash value</returns>
Private Function ComputeHash(ByVal hashAlgorithm As HashAlgorithm, ByVal data As String) As String
If hashAlgorithm Is Nothing Then
Throw New ArgumentNullException("hashAlgorithm")
End If
If String.IsNullOrEmpty(data) Then
Throw New ArgumentNullException("data")
End If
Dim dataBuffer As Byte() = System.Text.Encoding.ASCII.GetBytes(data)
Dim hashBytes As Byte() = hashAlgorithm.ComputeHash(dataBuffer)
Return Convert.ToBase64String(hashBytes)
End Function
''' <summary>
''' Internal function to cut out all non oauth query string parameters (all parameters not begining with "oauth_")
''' </summary>
''' <param name="parameters">The query string part of the Url</param>
''' <returns>A list of QueryParameter each containing the parameter name and value</returns>
Private Function GetQueryParameters(ByVal parameters As String) As List(Of QueryParameter)
If parameters.StartsWith("?") Then
parameters = parameters.Remove(0, 1)
End If
Dim result As New List(Of QueryParameter)()
If Not String.IsNullOrEmpty(parameters) Then
Dim p As String() = parameters.Split("&"c)
For Each s As String In p
If Not String.IsNullOrEmpty(s) AndAlso Not s.StartsWith(OAuthParameterPrefix) Then
If s.IndexOf("="c) > -1 Then
Dim temp As String() = s.Split("="c)
result.Add(New QueryParameter(temp(0), temp(1)))
Else
result.Add(New QueryParameter(s, String.Empty))
End If
End If
Next
End If
Return result
End Function
''' <summary>
''' This is a different Url Encode implementation since the default .NET one outputs the percent encoding in lower case.
''' While this is not a problem with the percent encoding spec, it is used in upper case throughout OAuth
''' </summary>
''' <param name="value">The value to Url encode</param>
''' <returns>Returns a Url encoded string</returns>
Public Function UrlEncode(ByVal value As String) As String
Dim result As New StringBuilder()
For Each symbol As Char In value
If unreservedChars.IndexOf(symbol) <> -1 Then
result.Append(symbol)
Else
result.Append("%"c & [String].Format("{0:X2}", AscW(symbol)))
End If
Next
Return result.ToString()
End Function
''' <summary>
''' Normalizes the request parameters according to the spec
''' </summary>
''' <param name="parameters">The list of parameters already sorted</param>
''' <returns>a string representing the normalized parameters</returns>
Protected Function NormalizeRequestParameters(ByVal parameters As IList(Of QueryParameter)) As String
Dim sb As New StringBuilder()
Dim p As QueryParameter = Nothing
For i As Integer = 0 To parameters.Count - 1
p = parameters(i)
sb.AppendFormat("{0}={1}", p.Name, p.Value)
If i < parameters.Count - 1 Then
sb.Append("&")
End If
Next
Return sb.ToString()
End Function
''' <summary>
''' Generate the signature base that is used to produce the signature
''' </summary>
''' <param name="url">The full url that needs to be signed including its non OAuth url parameters</param>
''' <param name="consumerKey">The consumer key</param>
''' <param name="token">The token, if available. If not available pass null or an empty string</param>
''' <param name="tokenSecret">The token secret, if available. If not available pass null or an empty string</param>
''' <param name="httpMethod">The http method used. Must be a valid HTTP method verb (POST,GET,PUT, etc)</param>
''' <param name="signatureType">The signature type. To use the default values use <see cref="OAuthBase.SignatureTypes">OAuthBase.SignatureTypes</see>.</param>
''' <returns>The signature base</returns>
Public Function GenerateSignatureBase(ByVal url As Uri, ByVal consumerKey As String, ByVal token As String, ByVal tokenSecret As String, ByVal httpMethod As String, ByVal timeStamp As String, _
ByVal nonce As String, ByVal signatureType As String, ByRef normalizedUrl As String, ByRef normalizedRequestParameters As String) As String
If token Is Nothing Then
token = String.Empty
End If
If tokenSecret Is Nothing Then
tokenSecret = String.Empty
End If
If String.IsNullOrEmpty(consumerKey) Then
Throw New ArgumentNullException("consumerKey")
End If
If String.IsNullOrEmpty(httpMethod) Then
Throw New ArgumentNullException("httpMethod")
End If
If String.IsNullOrEmpty(signatureType) Then
Throw New ArgumentNullException("signatureType")
End If
normalizedUrl = Nothing
normalizedRequestParameters = Nothing
Dim parameters As List(Of QueryParameter) = GetQueryParameters(url.Query)
parameters.Add(New QueryParameter(OAuthVersionKey, OAuthVersion))
parameters.Add(New QueryParameter(OAuthNonceKey, nonce))
parameters.Add(New QueryParameter(OAuthTimestampKey, timeStamp))
parameters.Add(New QueryParameter(OAuthSignatureMethodKey, signatureType))
parameters.Add(New QueryParameter(OAuthConsumerKeyKey, consumerKey))
If Not String.IsNullOrEmpty(token) Then
parameters.Add(New QueryParameter(OAuthTokenKey, token))
End If
If Not String.IsNullOrEmpty(oauth_verifier) Then
parameters.Add(New QueryParameter(oAauthVerifier, oauth_verifier))
End If
parameters.Sort(New QueryParameterComparer())
normalizedUrl = String.Format("{0}://{1}", url.Scheme, url.Host)
If Not ((url.Scheme = "http" AndAlso url.Port = 80) OrElse (url.Scheme = "https" AndAlso url.Port = 443)) Then
normalizedUrl += ":" & url.Port
End If
normalizedUrl += url.AbsolutePath
normalizedRequestParameters = NormalizeRequestParameters(parameters)
Dim signatureBase As New StringBuilder()
signatureBase.AppendFormat("{0}&", httpMethod.ToUpper())
signatureBase.AppendFormat("{0}&", UrlEncode(normalizedUrl))
signatureBase.AppendFormat("{0}", UrlEncode(normalizedRequestParameters))
Return signatureBase.ToString()
End Function
''' <summary>
''' Generate the signature value based on the given signature base and hash algorithm
''' </summary>
''' <param name="signatureBase">The signature based as produced by the GenerateSignatureBase method or by any other means</param>
''' <param name="hash">The hash algorithm used to perform the hashing. If the hashing algorithm requires initialization or a key it should be set prior to calling this method</param>
''' <returns>A base64 string of the hash value</returns>
Public Function GenerateSignatureUsingHash(ByVal signatureBase As String, ByVal hash As HashAlgorithm) As String
Return ComputeHash(hash, signatureBase)
End Function
''' <summary>
''' Generates a signature using the HMAC-SHA1 algorithm
''' </summary>
''' <param name="url">The full url that needs to be signed including its non OAuth url parameters</param>
''' <param name="consumerKey">The consumer key</param>
''' <param name="consumerSecret">The consumer seceret</param>
''' <param name="token">The token, if available. If not available pass null or an empty string</param>
''' <param name="tokenSecret">The token secret, if available. If not available pass null or an empty string</param>
''' <param name="httpMethod">The http method used. Must be a valid HTTP method verb (POST,GET,PUT, etc)</param>
''' <returns>A base64 string of the hash value</returns>
Public Function GenerateSignature(ByVal url As Uri, ByVal consumerKey As String, ByVal consumerSecret As String, ByVal token As String, ByVal tokenSecret As String, ByVal httpMethod As String, _
ByVal timeStamp As String, ByVal nonce As String, ByRef normalizedUrl As String, ByRef normalizedRequestParameters As String) As String
Return GenerateSignature(url, consumerKey, consumerSecret, token, tokenSecret, httpMethod, _
timeStamp, nonce, SignatureTypes.HMACSHA1, normalizedUrl, normalizedRequestParameters)
End Function
''' <summary>
''' Generates a signature using the specified signatureType
''' </summary>
''' <param name="url">The full url that needs to be signed including its non OAuth url parameters</param>
''' <param name="consumerKey">The consumer key</param>
''' <param name="consumerSecret">The consumer seceret</param>
''' <param name="token">The token, if available. If not available pass null or an empty string</param>
''' <param name="tokenSecret">The token secret, if available. If not available pass null or an empty string</param>
''' <param name="httpMethod">The http method used. Must be a valid HTTP method verb (POST,GET,PUT, etc)</param>
''' <param name="signatureType">The type of signature to use</param>
''' <returns>A base64 string of the hash value</returns>
Public Function GenerateSignature(ByVal url As Uri, ByVal consumerKey As String, ByVal consumerSecret As String, ByVal token As String, ByVal tokenSecret As String, ByVal httpMethod As String, _
ByVal timeStamp As String, ByVal nonce As String, ByVal signatureType As SignatureTypes, ByRef normalizedUrl As String, ByRef normalizedRequestParameters As String) As String
normalizedUrl = Nothing
normalizedRequestParameters = Nothing
Select Case signatureType
Case SignatureTypes.PLAINTEXT
Return HttpUtility.UrlEncode(String.Format("{0}&{1}", consumerSecret, tokenSecret))
Case SignatureTypes.HMACSHA1
Dim signatureBase As String = GenerateSignatureBase(url, consumerKey, token, tokenSecret, httpMethod, timeStamp, _
nonce, HMACSHA1SignatureType, normalizedUrl, normalizedRequestParameters)
Dim hmacsha1 As New HMACSHA1()
hmacsha1.Key = Encoding.ASCII.GetBytes(String.Format("{0}&{1}", UrlEncode(consumerSecret), If(String.IsNullOrEmpty(tokenSecret), "", UrlEncode(tokenSecret))))
Return GenerateSignatureUsingHash(signatureBase, hmacsha1)
Case SignatureTypes.RSASHA1
Throw New NotImplementedException()
Case Else
Throw New ArgumentException("Unknown signature type", "signatureType")
End Select
End Function
''' <summary>
''' Generate the timestamp for the signature
''' </summary>
''' <returns></returns>
Public Overridable Function GenerateTimeStamp() As String
' Default implementation of UNIX time of the current UTC time
Dim ts As TimeSpan = DateTime.UtcNow - New DateTime(1970, 1, 1, 0, 0, 0, _
0)
Return Convert.ToInt64(ts.TotalSeconds).ToString()
End Function
'
' public virtual string GenerateTimeStamp() {
' // Default implementation of UNIX time of the current UTC time
' TimeSpan ts = DateTime.UtcNow - new DateTime(1970, 1, 1, 0, 0, 0, 0);
' string timeStamp = ts.TotalSeconds.ToString();
' timeStamp = timeStamp.Substring(0, timeStamp.IndexOf(","));
' return Convert.ToInt64(timeStamp).ToString();
' }
''' <summary>
''' Generate a nonce
''' </summary>
''' <returns></returns>
Public Overridable Function GenerateNonce() As String
' Just a simple implementation of a random number between 123400 and 9999999
Return random.[Next](123400, 9999999).ToString()
End Function
End Class
