如何使用POST 方法调用服务

一、WCF REST专用POST方法

1.1、        建立WCF REST 方法

    [ServiceContract]
    public interface IBookingBizService
    {
        [WebInvoke(UriTemplate = "setdeliver", Method = "POST", ResponseFormat = WebMessageFormat.Json, RequestFormat = WebMessageFormat.Json, BodyStyle = WebMessageBodyStyle.Bare)]
        [OperationContract()]
        OperateResult SetDeliver(string args);

     }

1.2、        POST调用WCF REST 方法

        private string UseHttpWebApproach(string serviceUrl, string resourceUrl, string method, string requestBody)
        {
            string responseMessage = null;
            var request = WebRequest.Create(string.Concat(serviceUrl, resourceUrl)) as HttpWebRequest;
            if (request != null)
            {
                request.ContentType = "application/json";
                request.Method = method;
            }

            if (method == "POST" && requestBody != null)
            {
                byte[] requestBodyBytes = ToByteArrayUsingJsonContractSer(requestBody);

                request.ContentLength = requestBodyBytes.Length;

                using (Stream postStream = request.GetRequestStream())
                    postStream.Write(requestBodyBytes, 0, requestBodyBytes.Length);
            }

            if (request != null)
            {
                var response = request.GetResponse() as HttpWebResponse;
                if (response.StatusCode == HttpStatusCode.OK)
                {
                    Stream responseStream = response.GetResponseStream();
                    if (responseStream != null)
                    {
                        var reader = new StreamReader(responseStream);

                        responseMessage = reader.ReadToEnd();
                    }
                }
                else
                {
                    responseMessage = response.StatusDescription;
                }
            }
            return responseMessage;
        }

        private static byte[] ToByteArrayUsingJsonContractSer(string requestBody)
        {
            byte[] bytes = null;
            var serializer1 = new DataContractJsonSerializer(typeof(string));
            var ms1 = new MemoryStream();
            serializer1.WriteObject(ms1, requestBody);
            ms1.Position = 0;
            var reader = new StreamReader(ms1);
            bytes = ms1.ToArray();
            return bytes;
        }

调用WCF  REST 方法和一般的POST方法有所不同，区别在于发送前对数据的编码，采用DataContractJsonSerializer 进行序列化。

一般的对POST方法的调用采用如何数据编码

        private static byte[] ToByteArray(string requestBody)
        {
            byte[] bytes = null;
            bytes = Encoding.UTF8.GetBytes(requestBody);

            return bytes;
        }

如果要建立通用的POST调用服务，不建议采用WCF REST 形式，如果只是针对.net 平台的调用到时没有关系。