delphi如何实现php中的parse_url网址拆分函数?

php中拆分URL的一个很重要的函数就是parse_url();但在delphi如何不正则分析就可以实现如此方便的功能呢？实际上delphi的indy有一个单元实现此功能-IdURI单元，实现如下分拆

http://login:password@somehost.somedomain.com:8080/some_path/something.html?param1=val&param2=val#nose
\__/   \___/ \______/ \_____________________/ \__/\_______________________/ \___________________/ \__/
 |       |      |               |               |                |                   |              |
Scheme Username Password       Host            Port             Path              Query         Fragment

uses
  ..., IdURI;
 
var
  URI: TIdURI;
 
URI := TIdURI.Create('http://login:password@somehost.somedomain.com:8080/some_path/something_else.html?param1=val&param2=val');
try
   Protocol = URI.Protocol
   Username = URI.Username
   Password = URI.Password
   Host = URI.Host
   Port = URI.Port
   Path = URI.Path
   Query = URI.Params
finally
  URI.Free;
end;

以下是使用InternetCrackUrl方法实现(依赖windows的WinInet库)

{$APPTYPE CONSOLE}
 
uses
  Windows,
  SysUtils,
  WinInet;
 
procedure ParseURL(const lpszUrl: string);
var
  lpszScheme      : array[0..INTERNET_MAX_SCHEME_LENGTH - 1] of Char;
  lpszHostName    : array[0..INTERNET_MAX_HOST_NAME_LENGTH - 1] of Char;
  lpszUserName    : array[0..INTERNET_MAX_USER_NAME_LENGTH - 1] of Char;
  lpszPassword    : array[0..INTERNET_MAX_PASSWORD_LENGTH - 1] of Char;
  lpszUrlPath     : array[0..INTERNET_MAX_PATH_LENGTH - 1] of Char;
  lpszExtraInfo   : array[0..1024 - 1] of Char;
  lpUrlComponents : TURLComponents;
begin
  ZeroMemory(@lpszScheme, SizeOf(lpszScheme));
  ZeroMemory(@lpszHostName, SizeOf(lpszHostName));
  ZeroMemory(@lpszUserName, SizeOf(lpszUserName));
  ZeroMemory(@lpszPassword, SizeOf(lpszPassword));
  ZeroMemory(@lpszUrlPath, SizeOf(lpszUrlPath));
  ZeroMemory(@lpszExtraInfo, SizeOf(lpszExtraInfo));
  ZeroMemory(@lpUrlComponents, SizeOf(TURLComponents));
 
  lpUrlComponents.dwStructSize      := SizeOf(TURLComponents);
  lpUrlComponents.lpszScheme        := lpszScheme;
  lpUrlComponents.dwSchemeLength    := SizeOf(lpszScheme);
  lpUrlComponents.lpszHostName      := lpszHostName;
  lpUrlComponents.dwHostNameLength  := SizeOf(lpszHostName);
  lpUrlComponents.lpszUserName      := lpszUserName;
  lpUrlComponents.dwUserNameLength  := SizeOf(lpszUserName);
  lpUrlComponents.lpszPassword      := lpszPassword;
  lpUrlComponents.dwPasswordLength  := SizeOf(lpszPassword);
  lpUrlComponents.lpszUrlPath       := lpszUrlPath;
  lpUrlComponents.dwUrlPathLength   := SizeOf(lpszUrlPath);
  lpUrlComponents.lpszExtraInfo     := lpszExtraInfo;
  lpUrlComponents.dwExtraInfoLength := SizeOf(lpszExtraInfo);
 
  InternetCrackUrl(PChar(lpszUrl), Length(lpszUrl), ICU_DECODE or ICU_ESCAPE, lpUrlComponents);
 
  Writeln(Format('Protocol : %s',[lpszScheme]));
  Writeln(Format('Host     : %s',[lpszHostName]));
  Writeln(Format('User     : %s',[lpszUserName]));
  Writeln(Format('Password : %s',[lpszPassword]));
  Writeln(Format('Path     : %s',[lpszUrlPath]));
  Writeln(Format('ExtraInfo: %s',[lpszExtraInfo]));
end;
 
begin
  try
   ParseURL('http://login:password@somehost.somedomain.com/some_path/something_else.html?param1=val&param2=val');
  except
    on E: Exception do
      Writeln(E.ClassName, ': ', E.Message);
  end;
  readln;
end.

以上运行输出效果
Protocol : http
Host : somehost.somedomain.com
User : login
Password : password
Path : /some_path/something_else.html
ExtraInfo: ?param1=val&param2=val