Question

我正在开发一个通过get和post方法向wcf rest服务发送请求的应用程序。就我而言，GET方法运行正常。但在POST方法中，我总是收到错误代码400 Bad Request。

我的客户端代码： -

    string strInput = HttpUtility.UrlEncode("ab");
    byte[] data = GetBytes(strInput);
    //data = System.Text.ASCIIEncoding.ASCII.GetBytes(strInput);
    data = UTF8Encoding.UTF8.GetBytes(strInput);



    Stream objStream;
    WebRequest request = WebRequest.Create("http://localhost:9010/SampleServices/Service/Test/Category/Add");
    request.Method = "POST";
    request.ContentLength = data.Length;
    request.Credentials = CredentialCache.DefaultCredentials;

    request.ContentType = "text/xml";
    //request.ContentType = "application/x-www-urlencoded";
    objStream = request.GetRequestStream();
    objStream.Write(data, 0, data.Length);
    objStream.Close();


    WebResponse ws = request.GetResponse();
    Encoding enc = System.Text.Encoding.GetEncoding(1252);
    StreamReader responseStream = new StreamReader(ws.GetResponseStream());
    string response = responseStream.ReadToEnd();
    responseStream.Close();
    MessageBox.Show(response);

服务器端代码： -

[ServiceContract]
    public interface IService
    {
        [OperationContract]
        [WebInvoke(UriTemplate = "/Category/{categoryID}", Method = "GET")]
        Category GetCategory(string CategoryID);

        [OperationContract]
        [WebInvoke(UriTemplate = "/Category/Add", Method = "POST")]
        bool AddCategory(string category);
   }


public class Service : IService
    {
        public Category GetCategory(string categoryID)
        {
            NorthwindDataContext context = new NorthwindDataContext();
            var category = context.Categories.SingleOrDefault(e => e.CategoryID == Convert.ToInt32(categoryID));
            context.Dispose();
            return category;
        }

        public bool AddCategory(string category)
        {
            //NorthwindDataContext context = new NorthwindDataContext();
            //context.Categories.InsertOnSubmit(category);
            //context.SubmitChanges();
            //context.Dispose();
            return true;
        }
    }

我尝试了不同的内容类型选项，并尝试使用Url编码参数字符串但仍然遇到同样的问题。这可能是因为HttpGet工作正常的原因。为什么HttpPost存在问题？

WCF配置： -

<?xml version="1.0"?>
<configuration>
  <system.serviceModel>
    <services>
      <service name="SampleServices.Service" behaviorConfiguration="MYServiceBehavior">
        <endpoint address="mex" binding="mexHttpBinding" contract="IMetadataExchange" />
        <endpoint address="net.tcp://localhost:12000/SampleServices/Service" binding="netTcpBinding" bindingConfiguration="TCPBindingDetails" contract="SampleServices.IService" behaviorConfiguration="TCPBehavior">
        </endpoint>
        <endpoint name="webHttpBinding" address="REST" binding="webHttpBinding" behaviorConfiguration="RESTBehavior" contract="SampleServices.IService" />
        <host>
          <baseAddresses>
            <add baseAddress="http://localhost:9002/SampleServices/Service/" />
          </baseAddresses>
          <timeouts closeTimeout="01:20:10" openTimeout="01:20:00" />
        </host>
      </service>
    </services>
    <bindings>
      <netTcpBinding>
        <binding name="TCPBindingDetails" closeTimeout="00:10:00" openTimeout="00:10:00" receiveTimeout="00:10:00" sendTimeout="00:10:00" transactionFlow="false" transferMode="Buffered" transactionProtocol="OleTransactions" hostNameComparisonMode="StrongWildcard" listenBacklog="10" maxBufferPoolSize="5000000" maxBufferSize="5000000" maxConnections="10" maxReceivedMessageSize="5000000">
          <readerQuotas maxDepth="32" maxStringContentLength="2147483647" maxArrayLength="16384" maxBytesPerRead="4096" maxNameTableCharCount="16384" />
          <reliableSession ordered="true" inactivityTimeout="00:30:00" enabled="false" />
          <security mode="Transport">
            <transport clientCredentialType="Windows" protectionLevel="EncryptAndSign" />
            <message clientCredentialType="None" />
          </security>
        </binding>
      </netTcpBinding>
    </bindings>
    <behaviors>
      <endpointBehaviors>
        <clear />
        <behavior name="TCPBehavior">
          <dataContractSerializer maxItemsInObjectGraph="6553600" />
        </behavior>
        <behavior name="RESTBehavior">
          <dataContractSerializer maxItemsInObjectGraph="6553600" />
          <webHttp helpEnabled="true" />
        </behavior>
      </endpointBehaviors>
      <serviceBehaviors>
        <behavior name="MYServiceBehavior">
          <serviceMetadata httpGetEnabled="true" />
          <serviceDebug includeExceptionDetailInFaults="True" />
        </behavior>
      </serviceBehaviors>
    </behaviors>
    <serviceHostingEnvironment multipleSiteBindingsEnabled="true" />
  </system.serviceModel>
  <startup>
    <supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.0" />
  </startup>
</configuration>

Answer 1

导致此类错误的原因很多。尝试更改下面的元数据 -

[WebInvoke(UriTemplate = "/Category/Add", Method = "POST", ResponseFormat = WebMessageFormat.Xml, BodyStyle = WebMessageBodyStyle.WrappedRequest)]
bool AddCategory(string category);

Answer 2

我看过一些文章表明你需要使用webHttpBinding来实现这一点。这可能会有所帮助

获取其余WCF客户端的错误代码400错误请求

2 个答案: