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// Copyright (C) 2010 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.gitweb;
import com.google.gerrit.httpd.GitWebConfig;
import com.google.inject.Inject;
import com.google.inject.Singleton;
import org.eclipse.jgit.util.IO;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.util.concurrent.TimeUnit;
import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
@SuppressWarnings("serial")
@Singleton
class GitWebJavaScriptServlet extends HttpServlet {
private static final long MAX_AGE =
TimeUnit.MILLISECONDS.convert(5, TimeUnit.MINUTES);
private static final String CACHE_CTRL =
"public, max-age=" + (MAX_AGE / 1000L);
private final long modified;
private final byte[] raw;
@Inject
GitWebJavaScriptServlet(final GitWebConfig gitWebConfig) throws IOException {
byte[] png;
final File src = gitWebConfig.getGitwebJS();
if (src != null) {
try {
png = IO.readFully(src);
} catch (FileNotFoundException e) {
png = null;
}
modified = src.lastModified();
} else {
modified = -1;
png = null;
}
raw = png;
}
@Override
protected long getLastModified(final HttpServletRequest req) {
return modified;
}
@Override
protected void doGet(final HttpServletRequest req,
final HttpServletResponse rsp) throws IOException {
if (raw != null) {
final long now = System.currentTimeMillis();
rsp.setContentType("text/javascript");
rsp.setContentLength(raw.length);
rsp.setHeader("Cache-Control", CACHE_CTRL);
rsp.setDateHeader("Date", now);
rsp.setDateHeader("Expires", now + MAX_AGE);
rsp.setDateHeader("Last-Modified", modified);
final ServletOutputStream os = rsp.getOutputStream();
try {
os.write(raw);
} finally {
os.close();
}
} else {
rsp.sendError(HttpServletResponse.SC_NOT_FOUND);
}
}
}
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