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RqHref.java
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RqHref.java
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/**
* The MIT License (MIT)
*
* Copyright (c) 2014-2018 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.rq;
import java.io.IOException;
import java.io.InputStream;
import java.net.HttpURLConnection;
import java.net.URI;
import java.util.Iterator;
import lombok.EqualsAndHashCode;
import org.takes.HttpException;
import org.takes.Request;
import org.takes.misc.Href;
/**
* HTTP URI query parsing.
*
* <p>All implementations of this interface must be immutable and thread-safe.
*
* @author Yegor Bugayenko (yegor256@gmail.com)
* @version $Id$
* @since 0.9
*/
public interface RqHref extends Request {
/**
* Get HREF.
* @return HTTP href
* @throws IOException If fails
*/
Href href() throws IOException;
/**
* Request decorator, for HTTP URI query parsing.
*
* <p>The class is immutable and thread-safe.
* @author Dmitry Zaytsev (dmitry.zaytsev@gmail.com)
* @version $Id$
* @since 0.13.1
*/
@EqualsAndHashCode(callSuper = true)
final class Base extends RqWrap implements RqHref {
/**
* Ctor.
* @param req Original request
*/
public Base(final Request req) {
super(req);
}
@Override
public Href href() throws IOException {
final String uri = new RqRequestLine.Base(this).uri();
final Iterator<String> hosts = new RqHeaders.Base(this)
.header("host").iterator();
final Iterator<String> protos = new RqHeaders.Base(this)
.header("x-forwarded-proto").iterator();
final String host;
if (hosts.hasNext()) {
host = hosts.next().trim();
} else {
host = "localhost";
}
final String proto;
if (protos.hasNext()) {
proto = protos.next().trim();
} else {
proto = "http";
}
return new Href(String.format("%s://%s%s", proto, host, uri));
}
}
/**
* Smart decorator, with extra features.
*
* <p>The class is immutable and thread-safe.
*
* @author Yegor Bugayenko (yegor256@gmail.com)
* @since 0.14
*/
@EqualsAndHashCode
final class Smart implements RqHref {
/**
* Original.
*/
private final RqHref origin;
/**
* Ctor.
* @param req Original request
* @since 1.4
*/
public Smart(final Request req) {
this(new RqHref.Base(req));
}
/**
* Ctor.
* @param req Original request
*/
public Smart(final RqHref req) {
this.origin = req;
}
@Override
public Href href() throws IOException {
return this.origin.href();
}
@Override
public Iterable<String> head() throws IOException {
return this.origin.head();
}
@Override
public InputStream body() throws IOException {
return this.origin.body();
}
/**
* Get self.
* @return Self page, full URL
* @throws IOException If fails
* @since 0.14
*/
public Href home() throws IOException {
final URI full = URI.create(this.href().toString());
return new Href(
String.format(
"%s://%s/",
full.getScheme(),
full.getHost()
)
);
}
/**
* Get param or throw HTTP exception.
* @param name Name of query param
* @return Value of it
* @throws IOException If fails
*/
public String single(final CharSequence name) throws IOException {
final Iterator<String> params = this.href().param(name).iterator();
if (!params.hasNext()) {
throw new HttpException(
HttpURLConnection.HTTP_BAD_REQUEST,
String.format(
"query param \"%s\" is mandatory", name
)
);
}
return params.next();
}
/**
* Get param or default.
* @param name Name of query param
* @param def Default, if not found
* @return Value of it
* @throws IOException If fails
*/
public String single(final CharSequence name, final CharSequence def)
throws IOException {
final String value;
final Iterator<String> params = this.href().param(name).iterator();
if (params.hasNext()) {
value = params.next();
} else {
value = def.toString();
}
return value;
}
}
}