Question

我目前被分配到一个任务，我需要创建一个WCF，作为3个ASMX服务的代理。目前，这些服务由多个应用程序直接使用。

构建此WCF代理的原因是，我们更容易在一个入口点（WCF代理服务）而不是多个应用程序中更新asmx证书。

我创建了一个普通的.NET类库，它基本上为ASMX服务创建了一个单例实例，但我不确定如何在WCF服务中公开它。

如果你可以指出我可以看到WCF的例子作为消费ASMX服务的代理吗？

以下是我的代码：

public static class Service<T> where T : WebServicesClientProtocol
{
    static volatile T _Instance;
    static volatile int _NumberOfReference = 0;
    static object syncRoot = new object();

    static Service() { }

    public static T Instance
    {
        get
        {
            if (_Instance == null)
            {
                lock (syncRoot)
                {
                    if (_Instance == null)
                    _Instance = ServiceProxyHelper.CreateServiceProxy<T>(ConfigValueHelper.GetServiceUrl(typeof(T).Name), ConfigValueHelper.CertificateHashKey);
                }
            }
            return _Instance;
        }
    }
}

这是我使用的助手：

public static class ServiceProxyHelper
{
    public static T CreateServiceProxy<T>(string url, string clientBase64KeyId)
    {
        var webService = SetSecurityCredentials(clientBase64KeyId, url, typeof(T));

        if (webService == null)
            return default(T);

        return (T)Convert.ChangeType(webService, typeof(T));
    }

    private static WebServicesClientProtocol SetSecurityCredentials(string clientBase64KeyId, string url, Type serviceType)
    {
        WebServicesClientProtocol result = null;

        result = (WebServicesClientProtocol)Activator.CreateInstance(serviceType, true);
        result.Url = url;

        //Verify default credentials
        if (WebRequest.DefaultWebProxy != null)
        {
            result.Proxy = WebRequest.DefaultWebProxy;
            result.Credentials = CredentialCache.DefaultCredentials;
            result.Proxy.Credentials = CredentialCache.DefaultNetworkCredentials;
        }

        //Add security credentials to SOAP envelope
        var token = ServiceProxyHelper.GetSecurityToken(clientBase64KeyId, url);

        if (token == null)
            return null;

        result.RequestSoapContext.Security.Tokens.Add(token);
        result.RequestSoapContext.Security.Elements.Add(new MessageSignature(token));

        return result;
    }

    private static X509SecurityToken GetSecurityToken(string clientBase64KeyId, string url)
    {
        X509SecurityToken result = null;
        X509Certificate x509Certificate = null;

        var store = X509CertificateStore.CurrentUserStore(X509CertificateStore.MyStore);
        var isOpen = store.OpenRead();

        foreach (X509Certificate certificate in store.Certificates)
        {
            if (Convert.ToBase64String(certificate.GetKeyIdentifier()) != clientBase64KeyId)
                continue;

            x509Certificate = certificate;
            result = new X509SecurityToken(certificate);
            break;
        }

        if (isOpen)
            store.Close();

        return result;
    }
}

Answer 1

我在这种情况下我会在WCF中创建一个[ServiceContract]并添加ASMX中我希望客户端访问的所有方法。然后使用WCF端点公开该服务契约。它会像一个门面。希望这对你有意义。

WCF新手：创建WCF代理以连接到旧的ASMX Web服务

1 个答案: