src/main/java/org/takes/tk/TkSmartRedirect.java
/*
* The MIT License (MIT)
*
* Copyright (c) 2014-2024 Yegor Bugayenko
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included
* in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
package org.takes.tk;
import java.io.IOException;
import java.net.HttpURLConnection;
import java.net.URI;
import lombok.EqualsAndHashCode;
import lombok.ToString;
import org.takes.Request;
import org.takes.rq.RqRequestLine;
import org.takes.rs.RsRedirect;
/**
* Take that redirects, passing all query arguments and the fragment through.
*
* <p>The class is immutable and thread-safe.
*
* @since 1.9
*/
@ToString(callSuper = true)
@EqualsAndHashCode(callSuper = true)
public final class TkSmartRedirect extends TkWrap {
/**
* Ctor.
*/
public TkSmartRedirect() {
this("/");
}
/**
* Ctor.
* @param location Location to redirect to
*/
public TkSmartRedirect(final String location) {
this(location, HttpURLConnection.HTTP_SEE_OTHER);
}
/**
* Ctor.
* @param location Location to redirect to
* @param code Redirection status code
*/
public TkSmartRedirect(final String location, final int code) {
super(
req -> new RsRedirect(
new RedirectParams(
req, location
).location(),
code
)
);
}
/**
* Extract params from original query.
* @since 1.9
*/
private static final class RedirectParams {
/**
* Original request.
*/
private final Request req;
/**
* Original location.
*/
private final String origin;
/**
* Ctor.
* @param req Original request.
* @param origin Original location.
*/
RedirectParams(final Request req, final String origin) {
this.req = req;
this.origin = origin;
}
/**
* Get location with composed params.
* @return New location.
* @throws IOException in case of error.
*/
public String location() throws IOException {
final StringBuilder loc = new StringBuilder(this.origin);
final URI target = URI.create(this.origin);
final URI uri = URI.create(new RqRequestLine.Base(this.req).uri());
if (uri.getQuery() != null) {
if (target.getQuery() == null) {
loc.append('?');
} else {
loc.append('&');
}
loc.append(uri.getQuery());
}
if (uri.getFragment() != null) {
loc.append('#');
loc.append(uri.getFragment());
}
return loc.toString();
}
}
}