从控制台应用程序客户端调用时，我的 WCF 服务返回结果。但是，它正在显示

Exception: Unable to connect to remote server

实际错误:

Failed to invoke the service. Possible causes: The service is offline or inaccessible; the client-side configuration does not match the proxy; the existing proxy is invalid. Refer to the stack trace for more detail. You can try to recover by starting a new proxy, restoring to default configuration, or refreshing the service.

错误详情:

The server was unable to process the request due to an internal error. For more information about the error, either turn on IncludeExceptionDetailInFaults (either from ServiceBehaviorAttribute or from the configuration behavior) on the server in order to send the exception information back to the client, or turn on tracing as per the Microsoft .NET Framework SDK documentation and inspect the server trace logs.

Server stack trace: at System.ServiceModel.Channels.ServiceChannel.ThrowIfFaultUnderstood(Message reply, MessageFault fault, String action, MessageVersion version, FaultConverter faultConverter) at System.ServiceModel.Channels.ServiceChannel.HandleReply(ProxyOperationRuntime operation, ProxyRpc& rpc) at System.ServiceModel.Channels.ServiceChannel.Call(String action, Boolean oneway, ProxyOperationRuntime operation, Object[] ins, Object[] outs, TimeSpan timeout) at System.ServiceModel.Channels.ServiceChannelProxy.InvokeService(IMethodCallMessage methodCall, ProxyOperationRuntime operation) at System.ServiceModel.Channels.ServiceChannelProxy.Invoke(IMessage message)

Exception rethrown at [0]: at System.Runtime.Remoting.Proxies.RealProxy.HandleReturnMessage(IMessage reqMsg, IMessage retMsg) at System.Runtime.Remoting.Proxies.RealProxy.PrivateInvoke(MessageData& msgData, Int32 type) at IJiraService.GetProjects() at JiraServiceClient.GetProjects()

请注意，当 Fiddler 运行时，该服务工作正常。但是，如果我关闭 Fiddler，它会显示异常:

这是 Fiddler 日志(我正在获取数据):

TTP/1.1 200 连接建立 日期:2015 年 8 月 6 日星期四 14:39:22 GMT 代理连接:保持事件 通过:1.1 localhost.localdomain

加密的 HTTPS 流量流经此 CONNECT 隧道。 Fiddler 中启用了 HTTPS 解密，因此在此隧道中运行的解密 session 将显示在 Web session 列表中。

安全协议(protocol):Tls 密码:Aes128 128bits 哈希算法:Sha1 160bits key 交换:ECDHE_RSA (0xae06) 256bits

== 服务器证书 ========== [学科] CN=*.atlassian.net, O="Atlassian Network Services, Inc.", L=San Francisco, S=California, C=US

[发行人] CN=DigiCert SHA2 高保证服务器 CA, OU=www.digicert.com, O=DigiCert Inc, C=US

[序列号] 08E828A2F8C521A2DC7121A28E191837

[之前没有] 2014 年 9 月 9 日凌晨 5:30:00

[不在] 2017 年 11 月 15 日下午 5:30:00

[指纹] EA57BE3C6CDA33E6D875889944EE61284E39D91D

HTTP/1.1 200 正常 服务器:nginx 日期:2015 年 8 月 6 日星期四 14:39:26 GMT 内容类型:application/json;charset=UTF-8 传输编码:分块 连接:保持事件状态 变化:接受编码 X-AREQUESTID:39x4118x1 X-ASEN:SEN-2425233 设置cookie:JSESSIONID=8B68E46928883CA9F99382A67C228541；路径=/;安全的;仅限HTTP 设置 Cookie:studio.crowd.tokenkey="";域名=.clientname.atlassian.net;过期=星期四，1970 年 1 月 1 日 00:00:10 GMT；路径=/;安全的;仅限HTTP X-Seraph-LoginReason:OUT 设置 Cookie:studio.crowd.tokenkey=YcO0N1IItmmGYah6bzgN0w00；域名=.clientname.atlassian.net;路径=/;安全的;仅限HTTP X-Seraph-LoginReason:OK 设置 Cookie:atlassian.xsrf.token=ALMX-0SVV-VVCK-3Y73|c420e5bfab5c997ccdfa21ffa129d60a69af0013|lin;路径=/;安全的 X-ASESSIONID:b2v6it X-用户名:admin X-ATENANT-ID:clientname.atlassian.net 缓存控制:无缓存、无存储、无转换 X 内容类型选项:nosniff 严格传输安全:max-age=315360000；includeSubDomains

根据上面的 Fiddler 日志，我必须在 web.config 文件中更改才能使其正常工作吗？

从 WCF 测试客户端调用时。这是我尝试过的:

网络配置:

<?xml version="1.0"?>
  <configuration>
  <!--<system.net>
   <defaultProxy useDefaultCredentials="true" >
  </defaultProxy>
 </system.net>-->
<appSettings>
<add key="UserName" value="admin"/>
<add key="Password" value="admin"/>
<add key="resturl" value="https://Clientname.atlassian.net/rest/api/2/"/>
<add key="aspnet:UseTaskFriendlySynchronizationContext" value="true" />
</appSettings>
 <system.web>
  <compilation debug="true" targetFramework="4.5" />
  <httpRuntime targetFramework="4.5"/>
 </system.web>
 <system.serviceModel>
  <bindings>
  <basicHttpBinding>
    <binding name="BasicHttpBinding_IJiraService"/>
    </basicHttpBinding>
    </bindings>
   <client>
     <endpoint address="http://localhost:19065/JiraService.svc"  binding="basicHttpBinding"
        bindingConfiguration="BasicHttpBinding_IJiraService" contract="ServiceReference1.IJiraService"
       name="BasicHttpBinding_IJiraService" />
    </client>
    <behaviors>
     <serviceBehaviors>
       <behavior>
         <!-- To avoid disclosing metadata information, set the values below to false before deployment -->
         <serviceMetadata httpGetEnabled="true" httpsGetEnabled="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="false"/>
       </behavior>
       </serviceBehaviors>
      </behaviors>
      <protocolMapping>
      <add binding="basicHttpsBinding" scheme="https" />
   </protocolMapping>    
   <serviceHostingEnvironment aspNetCompatibilityEnabled="true"   multipleSiteBindingsEnabled="true" />
  </system.serviceModel>
  <system.webServer>
  <modules runAllManagedModulesForAllRequests="true"/>
   <!--
    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>

这是我在代码中请求的方式:

public class Service : IService
{
    private string GetRestURL()
    {
        return System.Configuration.ConfigurationManager.AppSettings["resturl"];
    }

    private string GetUserName()
    {
        return System.Configuration.ConfigurationManager.AppSettings["MyUserName"];
    }

    private string GetPassword()
    {
        return System.Configuration.ConfigurationManager.AppSettings["MyPassword"];
    }

 public string method()
 {
       HttpWebRequest request = WebRequest.Create(url) as HttpWebRequest;
        // HttpClient 


        request.ContentType = "application/json; charset=UTF-8";
        //request.ContentType = "text/xml; charset=UTF-8";
        /*request.Headers.Add("X-Atlassian-Token", "nocheck");
        request.UseDefaultCredentials = true;
        request.KeepAlive = true;*/
        request.Method = method;

        /*if (data != null)
        {
            using (StreamWriter writer = new StreamWriter(request.GetRequestStream(),Encoding.ASCII))
            {
                writer.Write(data);
            }
        }*/
        string base64Credentials = GetEncodedCredentials();
        request.Headers.Add("Authorization", "Basic " + base64Credentials);



     try
     {
        request.Headers.Add("Authorization", "Basic " + base64Credentials);

        response = request.GetResponse() as HttpWebResponse; //here its NULL

        if (response.StatusCode != HttpStatusCode.OK)
        {
                throw new Exception(String.Format("Server error (HTTP {0}:{1}).",response.StatusCode,response.StatusDescription));
        }
    }
    catch (Exception ex) //Here I'm getting exception
    {
        throw new Exception(ex.Message);
    }
 }

这是我的方法签名:

[ServiceContract]
public interface IService
{
    [OperationContract]
    List<ProjectDescription> GetProjects();
 }

注意:“方法”是从“GetProjects”调用的

这是我在通过调用 WCF 测试客户端进行调试时遇到的内部异常:

这是我的内心异常

A connection attempt failed because the connected party did not properly respond after a period of time, or established connection failed because connected host has failed to respond 165.254.xxx.xxx:443

注意:当我从控制台应用程序调试时没有调试异常。正如我所说，控制台应用程序运行良好，我能够从服务返回结果。

更新:当我在控制台应用程序中将此服务添加为“添加引用”时，它工作正常。但是，当我在同一个控制台应用程序中添加为“添加服务引用”时，它显示了同样的错误。是我的网络阻止了什么吗？请帮忙。

如何纠正这个问题？我还需要在 web.config 中添加其他内容吗？或者我是否需要在某处允许该 URL 作为受信任的 URL？

最佳答案

通过在 IIS 中添加代理解决了问题。 :)

关于c# - 添加服务引用给出异常 : Unable to connect to remote server，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/31579822/