Question

我在C＃中有一个代码，它基本上读取传递的WSDL以动态生成程序集，然后我们访问该服务的所有方法和属性。

/// <summary>
/// Builds an assembly from a web service description.
/// The assembly can be used to execute the web service methods.
/// </summary>
/// <param name="webServiceUri">Location of WSDL.</param>
/// <returns>A web service assembly.</returns>
private Assembly BuildAssemblyFromWSDL(Uri webServiceUri)
{
    if (String.IsNullOrEmpty(webServiceUri.ToString()))
        throw new Exception("Web Service Not Found");

    XmlTextReader xmlreader = new XmlTextReader(webServiceUri.ToString() + "?wsdl");

    ServiceDescriptionImporter descriptionImporter = BuildServiceDescriptionImporter(xmlreader);

    return CompileAssembly(descriptionImporter);
}

/// <summary>
/// Builds the web service description importer, which allows us to generate a proxy class based on the 
/// content of the WSDL described by the XmlTextReader.
/// </summary>
/// <param name="xmlreader">The WSDL content, described by XML.</param>
/// <returns>A ServiceDescriptionImporter that can be used to create a proxy class.</returns>
private ServiceDescriptionImporter BuildServiceDescriptionImporter(XmlTextReader xmlreader)
{
    // make sure xml describes a valid wsdl
    if (!ServiceDescription.CanRead(xmlreader))
        throw new Exception("Invalid Web Service Description");

    // parse wsdl
    ServiceDescription serviceDescription = ServiceDescription.Read(xmlreader);

    // build an importer, that assumes the SOAP protocol, client binding, and generates properties
    ServiceDescriptionImporter descriptionImporter = new ServiceDescriptionImporter();
    descriptionImporter.ProtocolName = "Soap";
    descriptionImporter.AddServiceDescription(serviceDescription, null, null);
    descriptionImporter.Style = ServiceDescriptionImportStyle.Client;
    descriptionImporter.CodeGenerationOptions = System.Xml.Serialization.CodeGenerationOptions.GenerateProperties;

    return descriptionImporter;
}

这段代码适用于除受保护或受保护的wsdls之外的所有wsdls。代码在if (!ServiceDescription.CanRead(xmlreader))行失败，因为它无法访问传递的服务wsdl。当我尝试访问浏览器中的URL时，我得到500：服务器错误。当我使用适当的身份验证登录我们的Web应用程序，然后使用相同的会话，如果我复制URL - 我可以访问wsdl。 Fyi，在不同的应用程序中，我们通过传递带有服务用户ID /密码的SM Cookies动态调用此服务。

话虽如此，我怎么能这样做，动态访问受保护的wsdl？传递cookie信息以访问wsdl需要做哪些更改？有什么想法吗？

Answer 1

private Assembly BuildAssemblyFromWSDL(Uri webServiceUri)
{    
    if (String.IsNullOrEmpty(webServiceUri.ToString()))        
        throw new Exception("Web Service Not Found");    

    HttpWebRequest wr = (HttpWebRequest)HttpWebRequest.Create(webServiceUri.OriginalString + "?wsdl");
    wr.Credentials = new NetworkCredential("username", "password"); //replace with your credentials
    HttpWebResponse wres = (HttpWebResponse)wr.GetResponse();

    XmlTextReader xmlreader = new XmlTextReader(wres.GetResponseStream());       

    ServiceDescriptionImporter descriptionImporter = BuildServiceDescriptionImporter(xmlreader);    
    return CompileAssembly(descriptionImporter);
}

这将允许您在获取wsdl之前传递凭据

Answer 2

这非常好，但在BuildAssemblyFromWSDL之后，当我尝试调用任何方法时，它再次给我一个错误消息，如...

请求失败，HTTP状态为401：未经授权。 at（T）type.InvokeMember（methodName，BindingFlags.InvokeMethod，null，obj，args）;

调用方法的代码就像......

public T InvokeMethod<T>(string serviceName, string methodName, params object[] args)
    {
        // create an instance of the specified service
        // and invoke the method
        object obj = this.webServiceAssembly.CreateInstance(serviceName);

        Type type = obj.GetType();

        return (T)type.InvokeMember(methodName, BindingFlags.InvokeMethod, null, obj, args);
    }

现在，我不知道如何在这里传递凭证..即使我试图通过其他方法传递，但仍然得到未经授权的错误..

真的很感谢你能帮忙......

ServiceDescription没有读取安全的wsdl

2 个答案: