[英]parsing an url in c# without protocol instead with port number
當我使用Uri類來解析像client-lb.dropbox.com:443之類的URL時,Uri類無法解析該值並獲得正確的結果,例如url.Port:443,url.Host = client-lb。 dropbox.com。
var urlValue = "client-lb.dropbox.com:443";
var url = new Uri(urlValue);
Console.WriteLine("Host : {0}, Port {1} ", url.Host, url.Port);
結果:
Host : , Port -1
我如何使用Uri類解決這個問題? 任何建議都表示贊賞..
var urlValue = "http://client-lb.dropbox.com:443";
var url = new Uri(urlValue);
Console.WriteLine("Host : {0}, Port {1} ", url.Host, url.Port);
響應:
Host : client-lb.dropbox.com, Port 443
Url應該看起來像[protocol]:// hostname:[port],默認情況下, https端口是443, http端口是80。
協議包含有關其默認端口的信息。 但是端口無法將它們與協議相關聯。
我重寫了這個解析器,感謝Trotinet項目的基礎實現。
private static void ParseUrl(string url)
{
string host = null;
var port = 123;
var prefix = 0;
if (url.Contains("://"))
{
if (url.StartsWith("http://"))
prefix = 7; // length of "http://"
else if (url.StartsWith("https://"))
{
prefix = 8; // length of "https://"
port = 443;
}
else
{
throw new Exception("Expected scheme missing or unsupported");
}
}
var slash = url.IndexOf('/', prefix);
string authority = null;
if (slash == -1)
{
// case 1
authority = url.Substring(prefix);
}
else
if (slash > 0)
// case 2
authority = url.Substring(prefix, slash - prefix);
if (authority != null)
{
Console.WriteLine("Auth is " + authority);
// authority is either:
// a) hostname
// b) hostname:
// c) hostname:port
var c = authority.IndexOf(':');
if (c < 0)
// case a)
host = authority;
else
if (c == authority.Length - 1)
// case b)
host = authority.TrimEnd('/');
else
{
// case c)
host = authority.Substring(0, c);
port = int.Parse(authority.Substring(c + 1));
}
}
Console.WriteLine("The Host {0} and Port : {1}", host, port);
}
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