public static long VisitWebPageSpeedTest(string url = "https://www.google.com", int port = -1)
{
var timeout = Str2Int(StrConst.SpeedTestTimeout);
long elasped = long.MaxValue;
using (WebClient wc = new Lib.Nets.TimedWebClient
{
Encoding = System.Text.Encoding.UTF8,
Timeout = timeout * 1000,
})
{
try
{
if (port > 0)
{
wc.Proxy = new WebProxy("127.0.0.1", port);
}
Stopwatch sw = new Stopwatch();
sw.Reset();
sw.Start();
wc.DownloadString(url);
sw.Stop();
elasped = sw.ElapsedMilliseconds;
}
catch { }
}
return(elasped);
}
public static string Fetch(string url, int timeout = -1)
{
var html = string.Empty;
using (WebClient wc = new Lib.Nets.TimedWebClient
{
Encoding = System.Text.Encoding.UTF8,
Timeout = timeout,
})
{
/* 如果用抛出异常的写法
* task中调用此函数时
* 会弹出用户未处理异常警告
*/
try
{
html = wc.DownloadString(url);
}
catch { }
}
return(html);
}
/// <summary>
/// Download through http://127.0.0.1:proxyPort. Return string.Empty if sth. goes wrong.
/// </summary>
/// <param name="url">string</param>
/// <param name="proxyPort">1-65535, other value means download directly</param>
/// <param name="timeout">millisecond, if <1 then use default value 30000</param>
/// <returns>If sth. goes wrong return string.Empty</returns>
public static string FetchThroughProxy(string url, int proxyPort, int timeout)
{
var html = string.Empty;
using (WebClient wc = new Lib.Nets.TimedWebClient
{
Encoding = System.Text.Encoding.UTF8,
Timeout = timeout,
})
{
if (proxyPort > 0 && proxyPort < 65536)
{
wc.Proxy = new WebProxy("127.0.0.1", proxyPort);
}
try
{
html = wc.DownloadString(url);
}
catch { }
}
return(html);
}
public static string FetchThroughProxy(string url, int proxyPort)
{
var html = string.Empty;
using (WebClient wc = new Lib.Nets.TimedWebClient
{
Encoding = System.Text.Encoding.UTF8,
Timeout = 30 * 1000,
})
{
wc.Proxy = new WebProxy("127.0.0.1", proxyPort);
/* 如果用抛出异常的写法
* task中调用此函数时
* 会弹出用户未处理异常警告
*/
try
{
html = wc.DownloadString(url);
}
catch { }
}
return(html);
}