com.google.gerrit.httpd.HttpCanonicalWebUrlProvider Maven / Gradle / Ivy
// Copyright (C) 2009 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 com.google.gerrit.server.config.CanonicalWebUrlProvider;
import com.google.gerrit.server.config.GerritServerConfig;
import com.google.inject.Inject;
import com.google.inject.OutOfScopeException;
import com.google.inject.Provider;
import com.google.inject.ProvisionException;
import java.util.Optional;
import javax.servlet.http.HttpServletRequest;
import org.eclipse.jgit.lib.Config;
import org.eclipse.jgit.util.SystemReader;
/** Sets {@code CanonicalWebUrl} to current HTTP request if not configured. */
public class HttpCanonicalWebUrlProvider extends CanonicalWebUrlProvider {
private Provider requestProvider;
@Inject
HttpCanonicalWebUrlProvider(@GerritServerConfig Config config) {
super(config);
}
@Inject(optional = true)
public void setHttpServletRequest(Provider hsr) {
requestProvider = hsr;
}
@Override
public String get() {
String canonicalUrl = super.get();
if (canonicalUrl != null) {
return canonicalUrl;
}
return guessUrlFromHttpRequest()
.orElseGet(() -> "http://" + SystemReader.getInstance().getHostname() + '/');
}
private Optional guessUrlFromHttpRequest() {
if (requestProvider == null) {
// We have no way of guessing our HTTP url.
return Optional.empty();
}
// No canonical URL configured? Maybe we can get a reasonable
// guess from the incoming HTTP request, if we are currently
// inside of an HTTP request scope.
//
final HttpServletRequest req;
try {
req = requestProvider.get();
} catch (ProvisionException noWeb) {
if (noWeb.getCause() instanceof OutOfScopeException) {
// We can't obtain the request as we are not inside of
// an HTTP request scope. Callers must handle null.
return Optional.empty();
}
throw noWeb;
}
return Optional.of(CanonicalWebUrl.computeFromRequest(req));
}
}