检查是否网址可以访问 - 帮助优化类 [英] Check if a url is reachable - Help in optimizing a Class

问题描述

净4和C＃。

我需要能够返回一个布尔值一类如果乌里（字符串）返回 HTTP状态$ C $ 200 CS 。

目前，我有这个code（其工作中使用尝试，看看是否可以连接到URI），但我会等来实现的HTTPStatus code.OK代替。

我尝试过不同的时间，但我不能做到这一点。

• 您能够解决它，并提供code的样本？


• 或者你知道一个更好的计算策略？

感谢您的帮助。

 公共静态布尔IsReachableUri（字符串uriInput）
        {
            //可变退换货
            布尔testStatus;
            //创建用于URL的请求。
            WebRequest的请求= WebRequest.Create（uriInput）;
            request.Timeout = 15000; // 15秒            WebResponse的响应;
            尝试
            {
                响应= request.GetResponse（）;
                testStatus =真; //乌里确实存在
                response.Close（）;
            }
            赶上（例外）
            {
                testStatus = FALSE; //乌里不存在
            }
            //结果
            返回testStatus;
        }
 

解决方案

嗯，首先这将是更好的为您的响应使用语句，而不是只调用关闭 - 在这种情况下，有没有太大的区别，但一般使用语句是要走的路。

至于测试结果状态 - 只投给 HttpWebResponse 的响应，然后使用<$c$c>Status$c$c属性。事情是这样的：

  HttpWebRequest的要求=（HttpWebRequest的）WebRequest.Create（URL）;
request.Timeout = 15000;
request.Method =HEAD; //按拉塞的评论
尝试
{
    使用（HttpWebResponse响应=（HttpWebResponse）request.GetResponse（））
    {
        返回response.Status code ==的HTTPStatus code.OK;
    }
}
赶上（引发WebException）
{
    返回false;
}
 

net 4 and c#.

I need a Class able to return a Bool value if an Uri (string) return HTTP status codes 200.

At the moment I have this code (it work using try to see if it is possible connect to the Uri) but I would like implemented with "HttpStatusCode.OK" instead.

I tried different time but I am not able to do it.

• Are you able to solve it and provide a sample of code?
• Or do you know a better approch?

Thanks for your help..

public static bool IsReachableUri(string uriInput)
        {
            // Variable to Return
            bool testStatus;
            // Create a request for the URL.
            WebRequest request = WebRequest.Create(uriInput);
            request.Timeout = 15000; // 15 Sec

            WebResponse response;
            try
            {
                response = request.GetResponse();
                testStatus = true; // Uri does exist                 
                response.Close();
            }
            catch (Exception)
            {
                testStatus = false; // Uri does not exist
            }
            // Result
            return testStatus;
        }

解决方案

Well, firstly it would be better to have a using statement for your response instead of just calling Close - in this case there's not much difference, but in general using statements are the way to go.

As for testing the result status - just cast the response to HttpWebResponse and then use the StatusCode property. Something like this:

HttpWebRequest request = (HttpWebRequest) WebRequest.Create(url);
request.Timeout = 15000;
request.Method = "HEAD"; // As per Lasse's comment
try
{
    using (HttpWebResponse response = (HttpWebResponse) request.GetResponse())
    {
        return response.StatusCode == HttpStatusCode.OK;
    }
}
catch (WebException)
{
    return false;
}

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