从Android 2.2手机请求WCF RESTful服务时出现请求错误

Question

我想在Android中创建一个方法，通过为它提供一个字符串参数，可以与WCF RESTful服务进行通信。

但是，每当我发出请求时，我得到的都是“请求错误”错误。 我尝试过通过Fiddler调用服务，但没有提供任何参数，而且效果很好。

我在这里做什么，该如何解决？

谢谢你的时间！

这是Java方法的代码：

private void addNewSighting() throws Exception
{
    String URL = "http://liveandesor.web711.discountasp.net/wcf/SightingServiceRest.svc/json/SaveNewSightingRest";

    AlertDialog popup;

    SightingWrapper sighting = new SightingWrapper();

    String xml = createXML(sighting);

    try{

        HttpPost request = new HttpPost(URL);

            request.setHeader("Accept", "application/json");
        request.setHeader("Content-type", "application/json");

        JSONObject json = new JSONObject();

        json.put("sighting", "holi");

        StringEntity sen = new StringEntity( "JSON: " + json.toString());  
        sen.setContentEncoding(new BasicHeader(HTTP.CONTENT_TYPE, "application/json"));

        request.setEntity(sen);

        DefaultHttpClient httpclient = new DefaultHttpClient();
        HttpResponse response = httpclient.execute(request);

        HttpEntity responseEntity = response.getEntity();

            char[] buffer = new char[(int)responseEntity.getContentLength()];

            InputStream stream = responseEntity.getContent();
            InputStreamReader reader = new InputStreamReader(stream);
            reader.read(buffer);
            stream.close();

            String responseString = new String(buffer);

            String holi = responseString;

        }
    catch(Exception e)
    {           

    }

}

这是我要调用的方法的协定，该协定位于SightingServiceRest服务中，并且仅返回字符串“ IT'S ALIVE !!”：

[OperationContract]
    [WebInvoke(Method = "POST", UriTemplate = "SaveNewSightingRest", ResponseFormat = WebMessageFormat.Json, RequestFormat = WebMessageFormat.Json)]
    string SaveNewSightingRest(string sighting);

这是WCF项目的webconfig：

    <?xml version="1.0"?>
<configuration>
  <connectionStrings>

    <add name="LiveAndesWCF" connectionString="data source=tcp:sql2k802.discountasp.net;Initial Catalog=SQL2008_832326_liveandes;User ID=randomUser;Password=randomPass; MultipleActiveResultSets=true" providerName="System.Data.SqlClient"/>
    <add name="LiveAndes" connectionString="data source=tcp:sql2k802.discountasp.net;Initial Catalog=SQL2008_832326_liveandes;User ID=randomUser;Password=randomPass; MultipleActiveResultSets=true" providerName="System.Data.SqlClient"/>

  </connectionStrings>
  <system.web>
    <compilation debug="true" targetFramework="4.0"/>
    <membership>
      <providers>
        <clear/>
        <add name="AspNetSqlMembershipProvider" type="System.Web.Security.SqlMembershipProvider" connectionStringName="LiveAndes" enablePasswordRetrieval="false" enablePasswordReset="true" requiresQuestionAndAnswer="false" requiresUniqueEmail="true" maxInvalidPasswordAttempts="5" minRequiredPasswordLength="6" minRequiredNonalphanumericCharacters="0" passwordAttemptWindow="10" applicationName="/"/>
      </providers>
    </membership>
  </system.web>
  <appSettings>
    <!--Local-->
    <!--
    <add key="mainPathDeployWCF" value="http://localhost:61642/"/>
    <add key="mainMachPathDeployWCF" value="\LiveAndesWCF\bin"/>
    -->
    <!-- Deploy -->

    <add key="mainPathDeployWCF" value="http://liveandesor.web711.discountasp.net/"/>
    <add key="mainMachPathDeployWCF" value="e:\web\liveandesor\htdocs"/>


    <!--<add key="mainMachPath" value="C:\Users\Rul\Documents\Universidad\2011'1\Taller de Especialidad\svn\Desarrollo\WEB\LiveAndesMVC\LiveAndesMVC"/>-->
  </appSettings>

  <system.serviceModel>
    <protocolMapping>
      <add scheme="http" binding="wsHttpBinding" />
    </protocolMapping>
    <services>
      <service name="LiveAndesWCF.SightingService">
        <endpoint address="soap" binding="basicHttpBinding" contract="LiveAndesWCF.ISightingService"/>
        <endpoint address="json" binding="webHttpBinding" behaviorConfiguration="jsonBehavior" contract="LiveAndesWCF.ISightingService"/>
      </service>
      <service name="LiveAndesWCF.UserService">
        <endpoint address="soap" binding="basicHttpBinding" contract="LiveAndesWCF.IUserService"/>
        <endpoint address="json" binding="webHttpBinding" behaviorConfiguration="jsonBehavior" contract="LiveAndesWCF.IUserService"/>
      </service>
      <service name="LiveAndesWCF.UserServiceRest" behaviorConfiguration="MetadataBehavior">
        <endpoint address="json" behaviorConfiguration="WebBehavior" binding="webHttpBinding" contract="LiveAndesWCF.IUserServiceRest"/>
      </service>
      <service name="LiveAndesWCF.SightingServiceRest" behaviorConfiguration="MetadataBehavior">
        <endpoint address="json" behaviorConfiguration="WebBehavior" binding="webHttpBinding" contract="LiveAndesWCF.ISightingServiceRest"/>
      </service>
      <service name="LiveAndesWCF.TestService">
        <endpoint address="soap" binding="basicHttpBinding" contract="LiveAndesWCF.ITestService"/>
        <endpoint address="json" binding="webHttpBinding" behaviorConfiguration="jsonBehavior" contract="LiveAndesWCF.ITestService"/>
      </service>
    </services>
    <bindings>
      <basicHttpBinding>
        <binding maxReceivedMessageSize="99999999" closeTimeout="00:02:00" openTimeout="00:02:00" receiveTimeout="00:10:00" sendTimeout="00:02:00">
          <readerQuotas maxArrayLength="76384000" maxStringContentLength="2147483647"/>
        </binding>
      </basicHttpBinding>
      <webHttpBinding>
        <binding maxReceivedMessageSize="99999999" closeTimeout="00:02:00" openTimeout="00:02:00" receiveTimeout="00:10:00" sendTimeout="00:02:00">
          <readerQuotas maxArrayLength="76384000" maxStringContentLength="2147483647"/>
        </binding>
      </webHttpBinding>
    </bindings>
    <behaviors>
      <endpointBehaviors>
        <behavior name="jsonBehavior">
          <enableWebScript/>
          <!--<webHttp/>-->
        </behavior>
        <behavior name="WebBehavior">
          <webHttp />
        </behavior>
      </endpointBehaviors>
      <serviceBehaviors>
        <behavior>
          <!-- To avoid disclosing metadata information, set the value below to false and remove the metadata endpoint above before deployment -->
          <serviceMetadata httpGetEnabled="true"/>
          <!-- To receive exception details in faults for debugging purposes, set the value below to true.  Set to false before deployment to avoid disclosing exception information -->
          <serviceDebug includeExceptionDetailInFaults="true"/>
        </behavior>
        <behavior name="MetadataBehavior">
          <serviceMetadata httpGetEnabled="true" httpGetUrl="" />          
        </behavior>
      </serviceBehaviors>
    </behaviors>
    <serviceHostingEnvironment multipleSiteBindingsEnabled="true"/>
  </system.serviceModel>
  <system.webServer>
    <modules runAllManagedModulesForAllRequests="true"/>
  </system.webServer>
</configuration>

Answer 1

前缀JSON:不正确。 您在Fiddler的测试中几乎没有使用过它。

将该行替换为：

StringEntity sen = new StringEntity(json.toString());