我们正在探索从 SOAP Web 服务切换到 REST 是否值得。我创建了一个包含以下信息的 REST Web 服务:
[ServiceContract]
public interface IRestServiceImpl
{
[OperationContract]
[WebInvoke(Method = "PUT", ResponseFormat = WebMessageFormat.Xml,
BodyStyle = WebMessageBodyStyle.Bare,
UriTemplate = "Execute")]
ExecuteResponse Execute(ExecuteRequest request);
[OperationContract]
[WebInvoke(Method = "PUT", ResponseFormat = WebMessageFormat.Json,
BodyStyle = WebMessageBodyStyle.Bare,
UriTemplate = "ExecutePutJSON")]
ExecuteResponse ExecutePutJSON(ExecuteRequest request);
}
(RestServiceImpl.svc.cs)背后的实现代码如下:
public class RestServiceImpl : IRestServiceImpl
{
public ExecuteResponse Execute(ExecuteRequest request)
{
//processing code that returns ExecuteResponse
}
public ExecuteResponse Execute(ExecuteRequest request)
{
//processing code that returns ExecuteResponse
}
}
RestServiceImpl.svc 如下:
<%@ ServiceHost Language="C#" Debug="true" Service="CICJIS.IWS.RestServiceImpl"
CodeBehind="RestServiceImpl.svc.cs" %>
Web.config:
<configuration>
<system.diagnostics>
<sources>
<source name="System.ServiceModel"
switchValue="Information, ActivityTracing">
<listeners>
<add name="messages" />
</listeners>
</source>
<source name="System.ServiceModel.MessageLogging">
<listeners>
<add name="messages" />
</listeners>
</source>
</sources>
<sharedListeners>
<add name="messages"
type="System.Diagnostics.XmlWriterTraceListener"
initializeData="C:\Logs\RestService.svclog" />
</sharedListeners>
<trace autoflush="true" />
</system.diagnostics>
<system.web>
<compilation debug="true" defaultLanguage="c#" targetFramework="4.0" />
<httpRuntime maxRequestLength="999999" maxQueryStringLength="999999"
executionTimeout="999"/>
</system.web>
<system.serviceModel>
<diagnostics>
<messageLogging
logEntireMessage="true"
logMalformedMessages="true"
logMessagesAtServiceLevel="true"
logMessagesAtTransportLevel="true"
maxMessagesToLog="3000"
maxSizeOfMessageToLog="10000000" />
</diagnostics>
<services>
<service name="RestServiceImpl" behaviorConfiguration="ServiceBehavior">
<endpoint address="" binding="webHttpBinding" contract="IRestServiceImpl"
behaviorConfiguration="web">
</endpoint>
</service>
</services>
<behaviors>
<endpointBehaviors>
<behavior name="web">
<webHttp />
</behavior>
</endpointBehaviors>
<serviceBehaviors>
<behavior name="ServiceBehavior">
<serviceMetadata httpGetEnabled="true" />
<serviceDebug includeExceptionDetailInFaults="true" />
</behavior>
<behavior name="">
<serviceMetadata httpGetEnabled="true" />
<serviceDebug includeExceptionDetailInFaults="false" />
</behavior>
</serviceBehaviors>
</behaviors>
<serviceHostingEnvironment multipleSiteBindingsEnabled="true" />
</system.serviceModel>
<system.webServer>
<modules runAllManagedModulesForAllRequests="true"/>
</system.webServer>
</configuration>
后面的实现代码与 SOAP webservice 做同样的事情并返回相同的 ExecuteResponse 对象。我通过 fiddler 使用了这两个服务,以获取有关获得响应所需时间的统计信息。SOAP Web 服务使用 ws-security,但 REST Web 服务没有实现任何安全性。我发现 SOAP 网络服务比 REST 网络服务更快地返回响应。
我不确定我们的场景是否不太适合 REST 服务,或者我是否错误地实现了 REST Web 服务?我也尝试过调试 REST 和 SOAP 服务,发现当它在方法中中断时,两种方法中的处理代码以相同的速率完成,但响应返回 REST 客户端所需的时间比 SOAP 长客户。序列化对象时,REST 的 WCF api 是否可能比 SOAP 的 WCF api 慢?
以下是来自 fiddler 的统计信息示例:
对于 SOAP:请求计数:1 发送字节:13,693(标头:299;正文:13,394) 接收字节:2,651,288(标头:235;正文:2,651,053) ClientConnected:16:12:39.775 ClientBeginRequest:16:12:39.775 GotRequestHeaders:16 :12:39.775 ClientDoneRequest:16:12:40.120确定网关:0ms DNS查找:0ms TCP / IP连接:1ms HTTPS握手:0ms ServerConnected:16:12:40.122 FiddlerBeginRequest:16:12:40.122 ServerGotRequest:16:12:40.122 ServerBeginResponse: 16:12:40.123 GotResponseHeaders: 16:13:25.744 ServerDoneResponse: 16:13:26.863 ClientBeginResponse: 16:13:25.744 ClientDoneResponse: 16:13:26.863 总耗时: 00:00:47.0877083 application/soap3+xml: 2,651, 〜标题〜:235
对于 REST:请求计数:1 发送字节:2,369(标头:298;正文:2,071) 接收字节:1,982,735(标头:230;正文:1,982,505) ClientConnected:16:12:07.728 ClientBeginRequest:16:12:32.427 GotRequestHeaders:16 :12:32.427 ClientDoneRequest:16:12:32.428确定网关:0ms DNS查找:0ms TCP / IP连接:2ms HTTPS握手:0ms ServerConnected:16:12:32.430 FiddlerBeginRequest:16:12:32.430 ServerGotRequest:16:12:32.431 ServerBeginResponse: 16:12:32.435 GotResponseHeaders: 16:20:06.914 ServerDoneResponse: 16:20:07.889 ClientBeginResponse: 16:20:06.914 ClientDoneResponse: 16:20:07.889 总耗时: 00:07:35.4626091 application/xml: 1,982,505 〜:230
两种服务之间的最大区别在于 ServerBeginResponse 到 GotResponseHeaders。我已经多次重复这个测试并得到了类似的发现。
有人遇到同样的发现吗?