Flutter : get the original link of shorten url - flutter

Question

I have to fetch some url link, but the link is shorten like "shorturl.at/cpqCE".
I want to get the original link url in flutter.
How can I do this?
in Phph I found this :
function expandShortUrl($url) {
$headers = get_headers($url, 1);
return $headers['Location'];
}
// will echo https://deluxeblogtips.com
echo expandShortUrl($url);

Answer 1

Thanks to #RandalSchwartz I solved it by using :
getUrl(url) async {
final client = HttpClient();
var uri = Uri.parse(url);
var request = await client.getUrl(uri);
request.followRedirects = false;
var response = await request.close();
while (response.isRedirect) {
response.drain();
final location = response.headers.value(HttpHeaders.locationHeader);
if (location != null) {
uri = uri.resolve(location);
request = await client.getUrl(uri);
// Set the body or headers as desired.
if (location.toString().contains('https://www.xxxxx.com')) {
return location.toString();
}
request.followRedirects = false;
response = await request.close();
}
}
}

Answer 2

you can also do it by just sending a normal post request with the short link and you will then get the response which includes the original/full URL.
e.g
var uri = Uri.parse(shortUrl);
try {
var response = await http.post(
uri,
headers: {"Accept": 'application/json'},
);
// with below code you get the full path of a short url
String fullPath = response.headers.entries.firstWhere((element) => element.key == "location").value;
print(fullPath);
} catch (e) {
print(e);
}
hope this can help your problem.