对WCF服务使用POST时出现问题

本文关键字：问题 POST WCF 服务 | 更新日期: 2023-09-27 18:24:40

我有这个操作合同

[OperationContract]
        [WebInvoke(Method = "POST",
            ResponseFormat = WebMessageFormat.Json,
            UriTemplate = "/post/address/")]
        ADE.Address GetPostAddress(PostContract DataContract);

这是DataContract

[DataContract]
    public class PostContract
    {
        [DataMember]
        public string k { get; set; }
        [DataMember]
        public string source { get; set; }
        [DataMember]
        public int isUrl { get; set; }
        [DataMember]
        public string ISO2Code { get; set; }
    }

我尝试从控制台应用程序使用执行此操作

using (var client = new WebClient())
{               
   var data = new NameValueCollection();
   data["k"] = "bla bla bla";
   data["source"] = "test text";
   data["isUrl"] = "0";
   data["ISO2Code"] = "be";
   var response = client.UploadValues("http://localhost:83/Ade.svc/post/address/", data);
   var responseString = Encoding.Default.GetString(response);
   }

我一直收到400的错误响应。我有使用GET的相同服务，它非常完美，只是有时source超过2000个字符，因此，我必须使用POST。

有什么明显我遗漏的吗？

对WCF服务使用POST时出现问题

错误的请求响应是因为内容类型错误。必须从Webclient切换到httpWebRequest

然后我可以将ContentType设置为需要的"application/json"。我无法使用Webclient更改标头Content-Type。

以下代码工作：

var httpWebRequest = (HttpWebRequest)WebRequest.Create("http://localhost:83/Ade.svc/post/address");
httpWebRequest.ContentType = "application/json";
httpWebRequest.Method = "POST";
using (var streamWriter = new StreamWriter(httpWebRequest.GetRequestStream()))
               {
                   string json = "{'"k'":'"key'"," +
                       "{'"source'":'"test test'"," +
                       "{'"isUrl'":'"0'"," +
                       "'"ISO2Code'":'"be'"}";
                   streamWriter.Write(json);
                   streamWriter.Flush();
                   streamWriter.Close();
               }
  var httpResponse = (HttpWebResponse)httpWebRequest.GetResponse();
  using (var streamReader = new StreamReader(httpResponse.GetResponseStream()))
     {
        var result = streamReader.ReadToEnd();    
     }

更新为了避免由于字符串中的无效字符而导致错误请求，请创建一个自定义类，并使用Json创建SerializeObject。

using (var streamWriter = new StreamWriter(httpWebRequest.GetRequestStream()))
                        {
                            //
                            // Create new reques object
                            //
                            RequestObject rObj = new RequestObject();
                            rObj.k = ConfigurationManager.AppSettings["restkey"].ToString();
                            rObj.source = row["SearchText"].ToString();
                            rObj.isUrl = "0";
                            rObj.ISO2Code = "be";
                            streamWriter.Write(JsonConvert.SerializeObject(rObj));
                            streamWriter.Flush();
                            streamWriter.Close();
                        }

也许可以试试这个：

[Serializable]
[DataContract(Name = "PostContract")]
public class PostContract
{
    [DataMember(Name = "k")]
    public string k { get; set; }
    [DataMember(Name = "source")]
    public string source { get; set; }
    [DataMember(Name = "isUrl")]
    public int isUrl { get; set; }
    [DataMember(Name = "ISO2Code")]
    public string ISO2Code { get; set; }
}
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