public URL(string abs_parent, string rel_url)
{
parent = ParseAbs(abs_parent);
if (rel_url.StartsWith("/"))
{
string real_url = parent.scheme + "://" + parent.host + rel_url;
url_main = ParseAbs(real_url);
url_main.org_str = real_url;
return;
}
RelURL tmp_url = ParseRel(rel_url);
int back_rest = BackProcess(ref tmp_url.path);
parent = ParseAbs(abs_parent, back_rest);
string result_path = "";
if (Regex.IsMatch(parent.path, "/$") && Regex.IsMatch(tmp_url.path, "^/"))
{
result_path = parent.path.Remove(0, parent.path.Length - 1) + tmp_url.path;
}
else if (Regex.IsMatch(parent.path, "[^/]$") && Regex.IsMatch(tmp_url.path, "^[^/]"))
{
result_path = parent.path + "/" + tmp_url.path;
}
else
{
result_path = parent.path + tmp_url.path;
}
string result = parent.scheme + "://" + parent.host + result_path + tmp_url.file + tmp_url.nav + tmp_url.query;
url_main = ParseAbs(result);
url_main.org_str = result;
}
RelURL ParseRel(string url)
{
RelURL comp = new RelURL();
Match match = Regex.Match(url, rgx_rel);
if (!match.Success)
{
throw new Exception("URL invalida");
}
comp.path = "";
if (match.Groups["file"].Value == "..")
{
comp.path = "..";
comp.file = null;
}
else if (match.Groups["file"].Value != "")
{
comp.file = match.Groups["file"].Value;;
}
if (match.Groups["path"].Value != "")
{
comp.path = match.Groups["path"].Value + comp.path;
}
if (match.Groups["goto"].Value != "")
{
comp.nav = match.Groups["goto"].Value;;
}
if (match.Groups["query"].Value != "")
{
comp.query = match.Groups["query"].Value;;
}
return(comp);
}
public RelURL RelativeTo(string absolute)
{
AbsURL parent = (new URL(absolute)).url_main;
MatchCollection origin = Regex.Matches(parent.path, rgx_path);
MatchCollection destiny = Regex.Matches(url_main.path, rgx_path);
bool fill = false;
string result = "";
//detecta diferentes hosts
if (url_main.host != parent.host)
{
for (int pth = 0; pth < origin.Count; pth++)
{
result += "../";
}
result += url_main.host;
if (url_main.path == null && url_main.path == "")
{
result += "/";
}
fill = true;
}
for (int c = 0; c < destiny.Count; c++)
{
//se rellena con los que quedan en destino
if (fill)
{
result += destiny[c].Value;
//origen es menor
//--->se completa con los que resten
}
else if (origin.Count - 1 < c)
{
result += destiny[c].Value;
//diferentes
//---> a partir de aqui se completa con ../ por las que resten
}
else if (origin[c].Value != destiny[c].Value)
{
fill = true;
for (int rest = 0; rest < origin.Count - c; rest++)
{
result += "../";
}
result += destiny[c].Value;
}
//origen mayor que destino
//--->completar con ../
if (c == destiny.Count - 1 && !fill && (origin.Count - 1) - c > 0)
{
for (int rest = 0; rest < (origin.Count - c) - 1; rest++)
{
result += "../";
}
}
}
RelURL rel_url = new RelURL()
{
org_str = result + url_main.file + url_main.nav + url_main.query,
path = result,
file = url_main.file,
nav = url_main.nav,
query = url_main.query
};
return(rel_url);
}
