如何使用POST 方法调用服务

Posted 2023-03-21

　一、WCF REST专用POST方法

　　

　　1.1、 建立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。 参考技术A

　一、WCF REST专用POST方法

　　

　　1.1、        建立WCF REST 方法

[ServiceContract]
public interface IBookingBizService
 
    [WebInvoke(UriTemplate = "setdeliver", Method = "<a href="https://www.baidu.com/s?wd=POST&tn=44039180_cpr&fenlei=mv6quAkxTZn0IZRqIHckPjm4nH00T1Y3uAPWrjc3uHNWuHbYmvfv0ZwV5Hcvrjm3rH6sPfKWUMw85HfYnjn4nH6sgvPsT6KdThsqpZwYTjCEQLGCpyw9Uz4Bmy-bIi4WUvYETgN-TLwGUv3EnHf4PHc3PHmzrj0kn1bsPWmdrf" target="_blank" class="baidu-highlight">POST</a>", 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。