/* | |
* 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 com.google.inject.Inject; | |
import com.google.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(); | |
} | |
} | |
} | |
} |