com.google.gerrit.httpd.CanonicalWebUrl Maven / Gradle / Ivy
// Copyright (C) 2013 The Android Open Source Project
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package com.google.gerrit.httpd;
import static java.nio.charset.StandardCharsets.UTF_8;
import com.google.gerrit.common.Nullable;
import com.google.inject.Inject;
import com.google.inject.Provider;
import java.io.UnsupportedEncodingException;
import java.net.URLDecoder;
import javax.servlet.http.HttpServletRequest;
public class CanonicalWebUrl {
private final Provider configured;
@Inject
CanonicalWebUrl(
@com.google.gerrit.server.config.CanonicalWebUrl @Nullable Provider provider) {
configured = provider;
}
public String get(HttpServletRequest req) {
String url = configured.get();
return url != null ? url : computeFromRequest(req);
}
@SuppressWarnings("JdkObsolete")
static String computeFromRequest(HttpServletRequest req) {
StringBuffer url = req.getRequestURL();
try {
url = new StringBuffer(URLDecoder.decode(url.toString(), UTF_8.name()));
url.setLength(url.length() - req.getServletPath().length());
if (url.charAt(url.length() - 1) != '/') {
url.append('/');
}
return url.toString();
} catch (UnsupportedEncodingException e) {
throw new IllegalStateException("Unsupported encoding for request URL " + url, e);
}
}
}