/*
* Copyright 2013 Google Inc. All Rights Reserved.
*
* 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.appengine.demos;
import com.google.appengine.tools.cloudstorage.GcsFileOptions;
import com.google.appengine.tools.cloudstorage.GcsFilename;
import com.google.appengine.tools.cloudstorage.GcsInputChannel;
import com.google.appengine.tools.cloudstorage.GcsOutputChannel;
import com.google.appengine.tools.cloudstorage.GcsService;
import com.google.appengine.tools.cloudstorage.GcsServiceFactory;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.PrintWriter;
import java.nio.ByteBuffer;
import java.nio.channels.Channels;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
/**
* Create, Write, Read, and Finalize Cloud Storage objects.
* Access your app at: http://myapp.appspot.com/
*/
@SuppressWarnings("serial")
public class PortOfFilesAPIGuestbookServlet extends HttpServlet {
public static final String BUCKETNAME = "ExampleBucketName";
public static final String FILENAME = "ExampleFileName";
@Override
public void doGet(HttpServletRequest req, HttpServletResponse resp) throws IOException {
resp.setContentType("text/plain");
resp.getWriter().println("Hello, world from java");
GcsService gcsService = GcsServiceFactory.createGcsService();
GcsFilename filename = new GcsFilename(BUCKETNAME, FILENAME);
GcsFileOptions options = new GcsFileOptions.Builder()
.mimeType("text/html")
.acl("public-read")
.addUserMetadata("myfield1", "my field value")
.build();
GcsOutputChannel writeChannel = gcsService.createOrReplace(filename, options);
PrintWriter writer = new PrintWriter(Channels.newWriter(writeChannel, "UTF8"));
writer.println("The woods are lovely dark and deep.");
writer.println("But I have promises to keep.");
writer.flush();
writeChannel.waitForOutstandingWrites();
writeChannel.write(ByteBuffer.wrap("And miles to go before I sleep.".getBytes("UTF8")));
writeChannel.close();
resp.getWriter().println("Done writing...");
GcsInputChannel readChannel = null;
BufferedReader reader = null;
try {
readChannel = gcsService.openReadChannel(filename, 0);
reader = new BufferedReader(Channels.newReader(readChannel, "UTF8"));
String line;
while ((line = reader.readLine()) != null) {
resp.getWriter().println("READ:" + line);
}
} finally {
if (reader != null) { reader.close(); }
}
}
}