从经典 ASP 调用 WCF 服务

Question

我在从经典 ASP 调用 WCF 服务中的方法时遇到问题。下面是服务和配置的代码：

服务

[ServiceContract(Namespace = "http://Plumtree.dartKW.PdfGenerator.Web")]
public interface IPdfGeneratorService
{
    [OperationContract]
    String GeneratePdf(String xml);
}

public class PdfGeneratorService : IPdfGeneratorService
{
    #region IPdfGeneratorService Members

    public String GeneratePdf(String xml)
    {
        return "hello";
    }

    #endregion
}

配置

<system.serviceModel>
  <bindings>
    <basicHttpBinding>
      <binding name="BasicHttpBinding_PdfGenerator"
               maxBufferSize="2147483647"
               maxReceivedMessageSize="2147483647"
               maxBufferPoolSize="2147483647"
               transferMode="Buffered">
        <readerQuotas
          maxArrayLength="2147483647"
          maxStringContentLength="2147483647"
          maxBytesPerRead="2147483647"
          maxNameTableCharCount="2147483647"
          maxDepth="32" />
      </binding>
    </basicHttpBinding>
  </bindings>
  <services>
    <service behaviorConfiguration="serviceBehavior"
             name="Plumtree.dartKW.PdfGenerator.Web.PdfGeneratorService">
      <endpoint binding="basicHttpBinding"
                bindingName="BasicHttpBinding_PdfGenerator"
                contract="Plumtree.dartKW.PdfGenerator.Web.IPdfGeneratorService" />
      <endpoint address="mex"
                binding="mexHttpBinding"
                contract="IMetadataExchange" />
    </service>
  </services>
  <behaviors>
    <serviceBehaviors>
      <behavior name="serviceBehavior">
        <serviceMetadata httpGetEnabled="true" />
        <serviceDebug includeExceptionDetailInFaults="false" />
      </behavior>
    </serviceBehaviors>
  </behaviors>
  <serviceHostingEnvironment multipleSiteBindingsEnabled="true" />
</system.serviceModel>

我已经在 WCF 测试客户端中测试了上述方法，它工作正常。这是我的asp页面中的代码：

mexMonikerString = "service:mexAddress='http://localhost:51997/PdfGeneratorService.svc/mex'"
mexMonikerString = mexMonikerString + ", address='http://localhost:51997/PdfGeneratorService.svc'"
mexMonikerString = mexMonikerString + ", binding=basicHttpBinding"
mexMonikerString = mexMonikerString + ", bindingNamespace='http://tempuri.org/'"
mexMonikerString = mexMonikerString + ", contract=IPdfGeneratorService"
mexMonikerString = mexMonikerString + ", contractNamespace='http://Plumtree.dartKW.PdfGenerator.Web'"

dim service
service = GetObject(mexMonikerString) 

每当我尝试这个时，我都会收到以下错误：

System.ServiceModel 错误“800401e4”

合约没有支持指定绑定的端点。

我尝试在名字对象中传递绑定配置名称 BasicHttpBinding_PdfGenerator 而不是 basicHttpBinding，但我得到了同样的错误。我在网上也找不到这个错误的任何其他例子。

任何帮助将不胜感激

Answer 1

您可以使用 JavaScript 轻松完成。这是嵌入在简单 HTML 页面中的一些 JavaScript 的副本，我将它提供给我的潜在 WCF Web 服务用户。

困难的部分可能是弄清楚 WCF 服务在请求中的期望。如果您有权访问 WCF 服务代码，则很容易弄清楚。另一种方法是使用 Fiddler 捕获客户端和 wcf 主机之间发送的成功消息。或者 WSDL，如果你能生成的话。

祝你好运。

function Ping() {             
//set up varable
var sContent;
// 'Content-Type: text/xml \r\n ' +
// 'Host: localhost:8085 \r\n \r\n  ';
sContent=  "<xml>Your message matching the web service's data or message contract</xml>";

var xmlhttp =  new XMLHttpRequest();
xmlhttp.open('POST', Demo.URL.value, true);  
xmlhttp.onreadystatechange = function() {
//this section acts as a listener, waiting for response from host
if (xmlhttp.readyState == 4||xmlhttp.readyState == 0) {
    //alert("Ready state: " + xmlhttp.readyState.toString());
    if (xmlhttp.status == 200) {
        //alert("good");
        Demo.pingresponse.value = "Response: " +xmlhttp.responseText;
    }
    if (xmlhttp.status !=200){
        //alert("bad");
        Demo.pingresponse.value = "Error: " +xmlhttp.status.toString() +"  response text:  " +xmlhttp.responseText;
    }
} else {
    //alert("readystate bad");
}
 }
 //send request    

xmlhttp.setRequestHeader("POST http:localhost:8085/HostInterface/HostConnect HTTP/1.1"); 
xmlhttp.setRequestHeader("VsDebuggerCausalityData",""); 
xmlhttp.setRequestHeader   ("SOAPAction","\"http://somestuff\""); 
xmlhttp.setRequestHeader("Host","localhost:8085"); 
xmlhttp.setRequestHeader("Expect","100-continue"); 
xmlhttp.setRequestHeader("Accept-Encoding","gzip, deflate"); 
xmlhttp.setRequestHeader("Connection","Keep-Alive"); 
xmlhttp.setRequestHeader("Content-Length","639");                   
xmlhttp.setRequestHeader("Content-type", "text/xml; charset=utf-8"); 
xmlhttp.send(sContent);                  
}