Question

我对HttpWebRequest有些疑问。我正在尝试管理带有WebService的服务器和带有CF 2.0客户端的Windows CE 6.0之间的连接，我的实际目的是检索Windows CE计算机的外部IP。我曾尝试使用HttpWebResponse，但在通话过程中卡住了。
现在我会更清楚，这是我在WinCE机器上运行以获取IP的代码：

    private string GetIPAddressRemote()
    {
        Uri validUri = new Uri("http://icanhazip.com");

        try
        {
            string externalIP = "";

            HttpWebRequest httpRequest = (HttpWebRequest)HttpWebRequest.Create(validUri);

            httpRequest.Credentials = CredentialCache.DefaultCredentials;
            httpRequest.Timeout = 10000;  // Just to haven't an endless wait

            using (HttpWebResponse httpResponse = (HttpWebResponse)httpRequest.GetResponse()) 
            /* HERE WE ARE
             * In this point my program stop working... 
             * well actually it doesn't throw any exception and doesn't crash at all
             * For that reason I've setted the timeout property because in this part
             * it starts to wait for a response that doesn't come
             */
            {
                using (Stream stream = httpResponse.GetResponseStream())
                { 
                    // retrieve the return string and 
                    // save it in the externalIP variable
                }
            }

            return externalIP;
        }
        catch(Exception ex)
        {
            return ex.Message;
        }
    }

那么，我的问题是什么？我不知道为什么它会在httpRequest.GetResponse()电话中卡住，任何想法？我要说我是代理人，所以我想出了代理可以阻止某些请求的想法，可能是吗？

Answer 1

好的，我想出了类似的东西：

    private string GetIPAddressRemote()
    {
        Uri validUri = new Uri("http://icanhazip.com/");

        int tryNum = 0;

        while (tryNum < 5)
        {
            tryNum++;

            try
            {
                string externalIP = "";

                WebProxy proxyObj = new WebProxy("http://myProxyAddress:myProxyPort/", true); // Read this from settings

                WebRequest request = WebRequest.Create(validUri);

                request.Proxy = proxyObj;
                request.Credentials = CredentialCache.DefaultCredentials;
                request.Timeout = 10000;  // Just to haven't an endless wait

                using (WebResponse response = request.GetResponse())
                {
                    Stream dataStream = response.GetResponseStream();

                    using (StreamReader reader = new StreamReader(dataStream))
                    {
                        externalIP = reader.ReadToEnd();
                    }
                }
                return externalIP;
            }
            catch (Exception ex)
            {
                if(tryNum > 4)
                    return ex.Message;
            }

            Thread.Sleep(1000);
        }
        return "";
    }

但现在的问题是没有任何信息需要检索。我的意思是，我从Stream解析的字符串是html页面，检索的字符串是：

<html>
  <body>
    <h1>It works!</h1>
    <p>This is the default web page for this server.</p>
    <p>The web server software is running but no content has been added, yet.</p>
  </body>
</html>

我现在能做什么？

HttpWebResponse没有回复

1 个答案: