package jp.btsol.products.plugins.updatesites;

import java.io.IOException;

import java.io.InputStream;

import java.util.logging.Logger;

import javax.servlet.http.HttpServlet;

import javax.servlet.http.HttpServletRequest;

import javax.servlet.http.HttpServletResponse;

import org.apache.commons.io.IOUtils;

import com.google.appengine.api.blobstore.BlobKey;

import com.google.appengine.api.files.AppEngineFile;

import com.google.appengine.api.files.FileService;

import com.google.appengine.api.files.FileServiceFactory;

import com.google.appengine.api.files.FileWriteChannel;

import com.google.appengine.api.images.ImagesServiceFactory;

import com.google.appengine.api.images.ServingUrlOptions;

@SuppressWarnings("serial")

public class ImageReceiverServlet extends HttpServlet {

private static final Logger log = Logger.getLogger(ImageReceiverServlet.class.getName());

public void doPost(HttpServletRequest req, HttpServletResponse resp)

throws IOException {

log.info("ImageReceiverServlet working...");

String imageUrl = serveImage(req);

resp.setContentType("text/plain");

resp.getWriter().print(imageUrl);

}

private String serveImage(HttpServletRequest req) throws IOException{

//POSTを読込むため、InputStreamオブジェクトをゲット

InputStream body = req.getInputStream();

//byte列に変換する

byte[] bytes = IOUtils.toByteArray(body);

/**

*  MIME Type for

*  JPG use "image/jpeg" for PNG use "image/png"

*  PDF use "application/pdf"

*  see more: https://en.wikipedia.org/wiki/Internet_media_type

*/

//イメージとして、Google Blobに保存する

String mimeType = "image/jpeg";

// save data to Google App Engine Blobstore 

FileService fileService = FileServiceFactory.getFileService();

AppEngineFile file = fileService.createNewBlobFile(mimeType); 

FileWriteChannel writeChannel = fileService.openWriteChannel(file, true);

writeChannel.write(java.nio.ByteBuffer.wrap(bytes));

writeChannel.closeFinally();

// your blobKey to your data in Google App Engine BlobStore

BlobKey blobKey = fileService.getBlobKey(file);

// THANKS TO BLOBKEY YOU CAN GET FOR EXAMPLE SERVING URL FOR IMAGES

// Get the image serving URL (in https:// format)

String imageUrl =

 ImagesServiceFactory.getImagesService().getServingUrl(

   ServingUrlOptions.Builder.withBlobKey(blobKey

         ).secureUrl(true));

log.info("url: " + imageUrl);

return imageUrl;

}

}