cltestgrid.GetBlob2.java Source code

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Here is the source code for cltestgrid.GetBlob2.java

Source

/* Copyright (C) 2011 Anton Vodonosov (avodonosov@yandex.ru)
 * See LICENSE for details.
 */
package cltestgrid;

import com.google.appengine.tools.cloudstorage.GcsFilename;
import com.google.appengine.tools.cloudstorage.GcsInputChannel;
import com.google.appengine.tools.cloudstorage.GcsServiceFactory;

import org.apache.commons.io.IOUtils;

import java.io.BufferedInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.nio.channels.Channels;
import java.util.zip.GZIPInputStream;

import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import static javax.servlet.http.HttpServletResponse.SC_MOVED_PERMANENTLY;
import javax.servlet.ServletException;

public class GetBlob2 extends HttpServlet {

    public void doGet(HttpServletRequest req, HttpServletResponse resp) throws IOException, ServletException {
        String userAgent = req.getHeader("User-Agent");
        if (userAgent != null && userAgent.contains("Baiduspider")) {
            resp.setStatus(SC_MOVED_PERMANENTLY);
            resp.setHeader("Location", "http://www.baidu.com/search/spider.html");
            resp.setHeader("X-READ-ME",
                    "Please honor robots.txt and don't waste our resources. http://cl-test-grid.appspot.com/robots.txt");
            return;
        }

        final String key = req.getParameter("key");
        GcsFilename filename = new GcsFilename("cl-test-grid-logs", key);
        GcsInputChannel readChannel = null;
        InputStream inputStream = null;
        try {
            final boolean lock = false;
            //readChannel = FileServiceFactory.getFileService().openReadChannel(file, lock);
            readChannel = GcsServiceFactory.createGcsService().openReadChannel(filename, 0);
            inputStream = Channels.newInputStream(readChannel);
            resp.setContentType("text/plain");
            // The log files are gzipped, but the Cloud Storage Client Library ungzips them automatically.
            // After we return this data, GAE gzips our output in case client accepts 'gzip' contect encoding.
            IOUtils.copy(new BufferedInputStream(inputStream, 100 * 1024), resp.getOutputStream());
            resp.getOutputStream().flush();
        } finally {
            IOUtils.closeQuietly(inputStream);
            IOUtils.closeQuietly(readChannel);
        }
    }
}