通过 HttpUrlConnection 在 Android 中使用 WCF Restful 服务，出现错误 405-Method Not Allowed

Question

我用 C# 编写了一个简单的 WCF Restful Web 服务，以针对某些参数获取一些值。这是我的 IService 代码：

[OperationContract]
    [WebInvoke(Method = "GET",
        ResponseFormat = WebMessageFormat.Json,
        BodyStyle = WebMessageBodyStyle.Wrapped)]
    string GetURL(string pVr);

这是 Service.svc 的代码

public string GetURL(string pVr)
    {
        try
        {
            string VersionCode = ConfigurationManager.AppSettings["MobAppVersionCode"];
            if (Convert.ToInt32(VersionCode) > Convert.ToInt32(pVr))
            {
                return "http://xxx.xxx.xxx.xxx/abc.apk";
            }
            else
            {
                return "No apk available";
            }
        }
        catch (Exception ex)
        {
            throw ex;
        }
    }

我的目的之一是当我将此 Web 服务发布到 IIS 时，该方法应该被隐藏（不再需要休息或帮助页面或 wsdl），以便我更改 Web 配置并像这样设置

<behaviors>
  <serviceBehaviors>
    <behavior name="SEILServiceBehaviour">
      <serviceMetadata httpGetEnabled="false" httpsGetEnabled="false" />
      <serviceDebug includeExceptionDetailInFaults="false" httpHelpPageEnabled="false" httpsHelpPageEnabled="false" />
    </behavior>
  </serviceBehaviors>
  <endpointBehaviors>
    <behavior name="web">
      <webHttp helpEnabled="false"/>
    </behavior>
  </endpointBehaviors>
</behaviors>

现在，在将此 Web 服务发布到 IIS 后，我可以通过邮递员或 Web 浏览器轻松查看服务结果，甚至可以通过 Retrofit2 android 库获取数据。但是当我用我的 HttpUrlConnection 代码连接这个 Web 服务时，它会显示错误 405-Method Not Allowed。这是我的连接页面的代码

public void onRequest(String urlParameters) {
    try {
        //Establishing connection with particular url
        URL url = new URL("http://xxx.xxx.xxx.xxx/Service.svc/GetURL");
        HttpURLConnection connection = (HttpURLConnection) url.openConnection();
        //Setting connection timeout
        connection.setReadTimeout(30000);
        connection.setConnectTimeout(30000);
        connection.setRequestMethod("POST");
        connection.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");
        connection.setRequestProperty("Content-Length", "" + Integer.toString(urlParameters.getBytes().length));
        connection.setRequestProperty("Content-Language", "en-US");
        connection.setUseCaches(false);
        connection.setDoInput(true);
        connection.setDoOutput(true);
        DataOutputStream wr = new DataOutputStream(connection.getOutputStream());
        wr.writeBytes(urlParameters);
        wr.flush();
        wr.close();

        InputStream inputStream;

        int status = connection.getResponseCode();

        if (status != HttpURLConnection.HTTP_OK)
            inputStream = connection.getErrorStream();
        else
            inputStream = connection.getInputStream();

        BufferedReader rd = new BufferedReader(new InputStreamReader(inputStream));
        String line;
        StringBuilder response = new StringBuilder();
        while ((line = rd.readLine()) != null) {
            response.append(line);
            response.append('\r');
        }
        rd.close();

        if (url.getHost().equals(connection.getURL().getHost())) {
            urlReceive = response.toString().trim();
        } else {
            urlReceive = "Internet Login Required";
        }
    } catch (IOException e) {
        urlReceive = "Connection Timed Out";
    }
}

请帮帮我

Answer 1

您的请求必须是GET，根据：

[WebInvoke(Method = "GET",

您使用的是POST：

connection.setRequestMethod("POST");

您需要更改代码以使用GET 请求而不是POST。