C#中Uri操作

  在现在的项目中，使用到uri的部分较多。

1. uri的解析方法：

 public static Uri ReturnUri(this string val)         {             if (string.IsNullOrEmpty(val))             {                 throw new ArgumentNullException(val);             }             try             {                 UriBuilder uri;                 if (val.StartsWith("http://", StringComparison.Ordinal))                 {                     uri = new UriBuilder(val);                 }                 else if (val.StartsWith("https://", StringComparison.Ordinal))                 {                     uri = new UriBuilder(val);                 }                 else if (val.Contains(":"))                 {                     var split = val.Split(':', '/');                     int port;                     int.TryParse(split[1], out port);                     uri = split.Length == 3                         ? new UriBuilder(Uri.UriSchemeHttp, split[0], port, "/" + split[2])                         : new UriBuilder(Uri.UriSchemeHttp, split[0], port);                 }                 else                 {                     uri = new UriBuilder(Uri.UriSchemeHttp, val);                 }                 return uri.Uri;             }             catch (Exception exception)             {                 throw new Exception(exception.Message, exception);             }         }

2.uri解析的重载：

  public static Uri ReturnUri(this string val, int port, bool ssl = default(bool))         {             if (string.IsNullOrEmpty(val))             {                 throw new ArgumentNullException(val);             }             try             {                 UriBuilder uri;                 if (val.StartsWith("http://", StringComparison.Ordinal))                 {                     var split = val.Split('/');                     uri = split.Length >= 4 ? new UriBuilder(Uri.UriSchemeHttp, split[2], port, "/" + split[3]) : new UriBuilder(new Uri($"{val}:{port}"));                 }                 else if (val.StartsWith("https://", StringComparison.Ordinal))                 {                     var split = val.Split('/');                     uri = split.Length >= 4                         ? new UriBuilder(Uri.UriSchemeHttps, split[2], port, "/" + split[3])                         : new UriBuilder(Uri.UriSchemeHttps, split[2], port);                 }                 else if(ssl)                 {                     uri = new UriBuilder(Uri.UriSchemeHttps, val, port);                 }                 else                 {                     uri = new UriBuilder(Uri.UriSchemeHttp, val, port);                 }                 return uri.Uri;             }             catch (Exception exception)             {                 throw new Exception(exception.Message, exception);             }         }

  public static Uri ReturnUriWithSubDir(this string val, int port, bool ssl, string subDir)         {             var uriBuilder = new UriBuilder(val);             if (ssl)             {                 uriBuilder.Scheme = Uri.UriSchemeHttps;             }             if (!string.IsNullOrEmpty(subDir))             {                 uriBuilder.Path = subDir;             }             uriBuilder.Port = port;             return uriBuilder.Uri;         }