Question

我正在努力在VB.Net中创建一个WCF restful API，到目前为止，从一个参数获取MSSQL数据库中的数据，并且保存数据当前正在工作。目前我正在尝试创建一个包含多个参数（电子邮件和密码）的服务合同来验证用户登录。这不断引发以下错误，我无法弄清楚如何解决这个问题：

错误：无法从localhost获取元数据：12345 / SMPCService.svc如果这是您有权访问的Windows（R）Communication Foundation服务，请检查您是否已在指定地址启用元数据发布。有关启用元数据发布的帮助，请参阅go.microsoft.com/fwlink/?LinkId=65455上的MSDN文档.WS-Metadata Exchange错误URI：localhost：12345 / SMPCService.svc元数据包含无法解析的引用：localhost ：12345 / SMPCService.svc”。无法激活请求的服务“localhost：12345 / SMPCService.svc”。有关详细信息，请参阅服务器的诊断跟踪日志.HTTP GET错误URI：localhost：12345 / SMPCService.svc下载'/localhost:12345/SMPCService.svc'时出错。请求失败，并显示错误消息： -

这是我的服务合同：

<OperationContract()>
<WebInvoke(Method:="GET", ResponseFormat:=WebMessageFormat.Json, BodyStyle:=WebMessageBodyStyle.Wrapped, UriTemplate:="ValidateLogin/{e}/{p}")>
Function ValidateLogin(ByVal sEmailAddress As String, ByVal sPassword As String) As List(Of CheckLogin)

这是名为ValidateLogin的函数：

Public Function ValidateLogin(ByVal sEmailAddress As String, ByVal sPassword As String) As List(Of CheckLogin) Implements ISMPCService.ValidateLogin
    Dim result As List(Of CheckLogin) = New List(Of CheckLogin)
    Dim uAction = New CheckLogin
    Dim pwd As String = ""
    Try
        ' Dimension Local Variables
        Dim uRecSnap As ADODB.Recordset

        ' Check For Open Connection
        If uDBase Is Nothing Then
            OpenConnection()
            bConnection = True
        End If

        ' Run Stored Procedure - Load Timesheet Record
        uCommand = New ADODB.Command
        With uCommand
            .ActiveConnection = uDBase
            .CommandType = ADODB.CommandTypeEnum.adCmdStoredProc
            .CommandTimeout = 0
            .Parameters.Append(.CreateParameter("@EmailAddress", ADODB.DataTypeEnum.adVarChar, ADODB.ParameterDirectionEnum.adParamInput, 30, sEmailAddress))
            .CommandText = "API_WebUser_ValidateLogin"
            uRecSnap = .Execute
        End With

        ' Populate List
        Do Until uRecSnap.EOF
            pwd = If(IsDBNull(uRecSnap("UserPassword").Value), "", uRecSnap("UserPassword").Value)
            uRecSnap.MoveNext()
        Loop
        uRecSnap = Nothing

        If pwd <> "" Then
            If pwd.Substring(0, 4) = "$2y$" Then
                Mid(pwd, 3, 1) = "a"
            End If

            If BCrypt.Net.BCrypt.Verify(SHA512Hash(sPassword), pwd) Then
                uAction.WasSuccessful = "OK"
                uAction.StatusDescription = "User credentials match"
            Else
                uAction.WasSuccessful = "FAIL"
                uAction.StatusDescription = "Failed to authorize user"
            End If

        Else
            uAction.WasSuccessful = "FAIL"
            uAction.StatusDescription = "Failed to authorize user"
        End If

        result.Add(uAction)
    Catch ex As Exception
        ' Catch Error
        If Err.Number <> 0 Then
            Console.WriteLine(ex.Message)
        End If

    Finally
        ' CleanUp

        ' Close Database Connection
        If bConnection Then CloseConnection()

    End Try

    Return result
End Function

最后，这是我的Web.config：

<?xml version="1.0"?>
<configuration>

  <appSettings>
    <add key="aspnet:UseTaskFriendlySynchronizationContext" value="true" />
  </appSettings>
  <system.web>
    <!--Disabled custom errors to allow display of detailed errors.-->
    <customErrors mode="Off"/>
    <compilation debug="true" strict="false" explicit="true" targetFramework="4.5" />
    <httpRuntime targetFramework="4.5" relaxedUrlToFileSystemMapping="true"/>
  </system.web>
  <system.serviceModel>
    <services>
      <!--Specify services the application hosts. 
      Name specifies the type that provides an implementation of a service contract.
      Behavior Configuration specifies the name of one of the behaviours found in the behaviours element and governs actions such as whether the service allows impersonation.-->
      <service name="SMPCWebService.SMPCService" behaviorConfiguration="SMPCWebService.SMPCServiceBehaviour">
        <!--Define the service endpoints.-->  
        <endpoint address="../SMPCService.svc" behaviorConfiguration="webBehaviour" binding="webHttpBinding" contract="SMPCWebService.ISMPCService" />
        <endpoint address="mex" binding="mexHttpBinding" contract="IMetadataExchange" />
      </service>
    </services>
    <behaviors>
      <serviceBehaviors>
          <behavior name="SMPCWebService.SMPCServiceBehaviour">
            <!-- To avoid disclosing metadata information, set the values below to false before deployment -->
            <serviceMetadata httpGetEnabled="true"/>
            <!-- To receive exception details in faults for debugging purposes, set the value below to true.  Set to false before deployment to avoid disclosing exception information -->
            <serviceDebug includeExceptionDetailInFaults="true" />
        </behavior>
      </serviceBehaviors>
      <!--Define the endpoint behaviour.-->
      <endpointBehaviors>
        <behavior name="webBehaviour">
          <webHttp />
        </behavior>
      </endpointBehaviors>
    </behaviors>
    <protocolMapping>
        <add binding="basicHttpsBinding" scheme="https" />
    </protocolMapping>    
    <serviceHostingEnvironment aspNetCompatibilityEnabled="true" multipleSiteBindingsEnabled="true" />
  </system.serviceModel>
  <system.webServer>
    <!-- Allowing Cross-Origin Resource Sharing (CORS) - The httpProtocol settings allow web services to be called from external domains using JavaScript-->
    <httpProtocol>
      <customHeaders>
        <add name="Access-Control-Allow-Origin" value="*" />
        <add name="Access-Control-Allow-Headers" value="Content-Type, Accept" />
      </customHeaders>
    </httpProtocol>
    <modules runAllManagedModulesForAllRequests="true"/>
    <httpErrors errorMode="Detailed" />
    <validation validateIntegratedModeConfiguration="false"/>
    <!--
        To browse web app root directory during debugging, set the value below to true.
        Set to false before deployment to avoid disclosing web app folder information.
      -->
    <directoryBrowse enabled="true"/>
  </system.webServer>

</configuration>

我已经查看了许多帖子以找到这个问题的提示，但我没有到达任何地方。

我看过的帖子：

Why do I get this WCF error when 'GET'ing?

Failed to add a service. Service metadata may not be accessible. Make sure your service is running and exposing metadata.`

How to send email address as parameter in wcf method

http://jeffbarnes.net/blog/post/2006/10/16/metadata-exchange-endpoint.aspx

Answer 1

在尝试了不同的方法之后，我终于解决了我出错的地方。

函数的参数名称需要与UriTemplate中指定的参数命名相同。

原件：

<OperationContract()>
<WebInvoke(Method:="GET", ResponseFormat:=WebMessageFormat.Json, BodyStyle:=WebMessageBodyStyle.Wrapped, UriTemplate:="ValidateLogin/{e}/{p}")>
Function ValidateLogin(ByVal sEmailAddress As String, ByVal sPassword As String) As List(Of CheckLogin)

修正：

<OperationContract()>
<WebInvoke(Method:="GET", ResponseFormat:=WebMessageFormat.Json, BodyStyle:=WebMessageBodyStyle.Wrapped, UriTemplate:="ValidateLogin/{e}/{p}")>
Function ValidateLogin(ByVal e As String, ByVal p As String) As List(Of CheckLogin)

具有多个参数{W 44}的WCF Restful API

1 个答案: