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// Copyright (C) 2008 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.rpc;
import com.google.gerrit.common.auth.SignInRequired;
import com.google.gerrit.common.errors.NotSignedInException;
import com.google.gerrit.httpd.WebSession;
import com.google.gson.GsonBuilder;
import com.google.gwtjsonrpc.common.RemoteJsonService;
import com.google.gwtjsonrpc.server.ActiveCall;
import com.google.gwtjsonrpc.server.JsonServlet;
import com.google.gwtorm.server.OrmException;
import com.google.inject.Inject;
import com.google.inject.Provider;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
/**
* Base JSON servlet to ensure the current user is not forged.
*/
@SuppressWarnings("serial")
final class GerritJsonServlet extends JsonServlet<GerritJsonServlet.GerritCall> {
private final Provider<WebSession> session;
private final RemoteJsonService service;
@Inject
GerritJsonServlet(final Provider<WebSession> w, final RemoteJsonService s) {
session = w;
service = s;
}
@Override
protected GerritCall createActiveCall(final HttpServletRequest req,
final HttpServletResponse rsp) {
return new GerritCall(session.get(), req, rsp);
}
@Override
protected GsonBuilder createGsonBuilder() {
final GsonBuilder g = super.createGsonBuilder();
g.registerTypeAdapter(org.eclipse.jgit.diff.Edit.class,
new org.eclipse.jgit.diff.EditDeserializer());
return g;
}
@Override
protected void preInvoke(final GerritCall call) {
super.preInvoke(call);
if (call.isComplete()) {
return;
}
if (call.getMethod().getAnnotation(SignInRequired.class) != null) {
// If SignInRequired is set on this method we must have both a
// valid XSRF token *and* have the user signed in. Doing these
// checks also validates that they agree on the user identity.
//
if (!call.requireXsrfValid() || !session.get().isSignedIn()) {
call.onFailure(new NotSignedInException());
return;
}
}
}
@Override
protected Object createServiceHandle() {
return service;
}
static class GerritCall extends ActiveCall {
private final WebSession session;
GerritCall(final WebSession session, final HttpServletRequest i,
final HttpServletResponse o) {
super(i, o);
this.session = session;
}
@Override
public void onFailure(final Throwable error) {
if (error instanceof IllegalArgumentException
|| error instanceof IllegalStateException) {
super.onFailure(error);
} else if (error instanceof OrmException
|| error instanceof RuntimeException) {
onInternalFailure(error);
} else {
super.onFailure(error);
}
}
@Override
public boolean xsrfValidate() {
final String keyIn = getXsrfKeyIn();
if (keyIn == null || "".equals(keyIn)) {
// Anonymous requests don't need XSRF protection, they shouldn't
// be able to cause critical state changes.
//
return !session.isSignedIn();
} else {
// The session must exist, and must be using this token.
//
return session.isSignedIn() && session.isTokenValid(keyIn);
}
}
}
}
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