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/*
* slcl-android, an Android frontend for slcl
* Copyright (C) 2023-2024 Xavier Del Campo Romero
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
package org.slcl.core;
import org.slcl.core.Connection;
import java.io.OutputStream;
import java.io.IOException;
import java.net.HttpURLConnection;
import java.util.List;
import java.util.Map;
public final class Login {
public String login(final boolean https, final String url,
final String username, final String password) throws IOException
{
final Connection conn = new Connection(https, url + "/login");
final HttpURLConnection c = conn.getConnection();
c.setRequestMethod("POST");
c.setInstanceFollowRedirects(false);
c.setReadTimeout(5000);
final OutputStream os = c.getOutputStream();
final String data = "username=" + username + "&password=" + password;
os.write(data.getBytes());
final int code = c.getResponseCode();
switch (code)
{
case HttpURLConnection.HTTP_FORBIDDEN:
throw new IOException("Forbidden");
case HttpURLConnection.HTTP_UNAUTHORIZED:
throw new IOException("Unauthorized");
case HttpURLConnection.HTTP_SEE_OTHER:
{
final Map<String,List<String>> headers = c.getHeaderFields();
final List<String> cookies = headers.get("Set-Cookie");
final List<String> locations = headers.get("Location");
if (locations == null) {
throw new IOException("Expected Location header");
} else if (locations.size() != 1) {
throw new IOException("Expected only 1 Location header");
}
final String location = locations.toArray(new String[0])[0],
exp_location = "/user/";
if (!location.equals(exp_location)) {
throw new IOException("Expected redirection to "
+ exp_location + ", got \"" + location + "\"");
}
if (cookies != null) {
if (cookies.size() != 1) {
throw new IOException("Expected only 1 cookie");
}
return cookies.toArray(new String[0])[0];
} else {
throw new IOException("No Cookie found");
}
}
default:
throw new IOException("Unexpected HTTP status " + code);
}
}
}
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