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/*
* Copyright 2013 gitblit.com.
*
* 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.gitblit.servlet;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import javax.inject.Inject;
import javax.inject.Singleton;
import javax.servlet.ServletContext;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import com.gitblit.Keys;
import com.gitblit.manager.IRuntimeManager;
/**
* Handles requests for logo.png
*
* @author James Moger
*
*/
@Singleton
public class LogoServlet extends HttpServlet {
private static final long serialVersionUID = 1L;
private static final long lastModified = System.currentTimeMillis();
private IRuntimeManager runtimeManager;
@Inject
public LogoServlet(IRuntimeManager runtimeManager) {
this.runtimeManager = runtimeManager;
}
@Override
protected long getLastModified(HttpServletRequest req) {
File file = runtimeManager.getFileOrFolder(Keys.web.headerLogo, "${baseFolder}/logo.png");
if (file.exists()) {
return Math.max(lastModified, file.lastModified());
} else {
return lastModified;
}
}
@Override
protected void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
InputStream is = null;
try {
String contentType = null;
File file = runtimeManager.getFileOrFolder(Keys.web.headerLogo, "${baseFolder}/logo.png");
if (file.exists()) {
// custom logo
ServletContext context = request.getSession().getServletContext();
contentType = context.getMimeType(file.getName());
response.setContentLength((int) file.length());
response.setDateHeader("Last-Modified", Math.max(lastModified, file.lastModified()));
is = new FileInputStream(file);
} else {
// default logo
response.setDateHeader("Last-Modified", lastModified);
is = getClass().getResourceAsStream("/logo.png");
}
if (contentType == null) {
contentType = "image/png";
}
response.setContentType(contentType);
response.setHeader("Cache-Control", "public, max-age=3600, must-revalidate");
OutputStream os = response.getOutputStream();
byte[] buf = new byte[4096];
int bytesRead = is.read(buf);
while (bytesRead != -1) {
os.write(buf, 0, bytesRead);
bytesRead = is.read(buf);
}
os.flush();
} catch (Exception e) {
e.printStackTrace();
} finally {
if (is != null) {
is.close();
}
}
}
}
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