Example 1 with BlobstoreService
use of com.google.appengine.api.blobstore.BlobstoreService in project java-docs-samples by GoogleCloudPlatform.
the class ImagesServlet method doGet.
// [END gcs]
@Override
public void doGet(HttpServletRequest req, HttpServletResponse resp) throws IOException {
// [START original_image]
// Read the image.jpg resource into a ByteBuffer.
FileInputStream fileInputStream = new FileInputStream(new File("WEB-INF/image.jpg"));
FileChannel fileChannel = fileInputStream.getChannel();
ByteBuffer byteBuffer = ByteBuffer.allocate((int) fileChannel.size());
fileChannel.read(byteBuffer);
byte[] imageBytes = byteBuffer.array();
// Write the original image to Cloud Storage
gcsService.createOrReplace(new GcsFilename(bucket, "image.jpeg"), new GcsFileOptions.Builder().mimeType("image/jpeg").build(), ByteBuffer.wrap(imageBytes));
// [END original_image]
// [START resize]
// Get an instance of the imagesService we can use to transform images.
ImagesService imagesService = ImagesServiceFactory.getImagesService();
// Make an image directly from a byte array, and transform it.
Image image = ImagesServiceFactory.makeImage(imageBytes);
Transform resize = ImagesServiceFactory.makeResize(100, 50);
Image resizedImage = imagesService.applyTransform(resize, image);
// Write the transformed image back to a Cloud Storage object.
gcsService.createOrReplace(new GcsFilename(bucket, "resizedImage.jpeg"), new GcsFileOptions.Builder().mimeType("image/jpeg").build(), ByteBuffer.wrap(resizedImage.getImageData()));
// [END resize]
// [START rotate]
// Make an image from a Cloud Storage object, and transform it.
BlobstoreService blobstoreService = BlobstoreServiceFactory.getBlobstoreService();
BlobKey blobKey = blobstoreService.createGsBlobKey("/gs/" + bucket + "/image.jpeg");
Image blobImage = ImagesServiceFactory.makeImageFromBlob(blobKey);
Transform rotate = ImagesServiceFactory.makeRotate(90);
Image rotatedImage = imagesService.applyTransform(rotate, blobImage);
// Write the transformed image back to a Cloud Storage object.
gcsService.createOrReplace(new GcsFilename(bucket, "rotatedImage.jpeg"), new GcsFileOptions.Builder().mimeType("image/jpeg").build(), ByteBuffer.wrap(rotatedImage.getImageData()));
// [END rotate]
// Output some simple HTML to display the images we wrote to Cloud Storage
// in the browser.
PrintWriter out = resp.getWriter();
out.println("<html><body>\n");
out.println("<img src='//storage.cloud.google.com/" + bucket + "/image.jpeg' alt='AppEngine logo' />");
out.println("<img src='//storage.cloud.google.com/" + bucket + "/resizedImage.jpeg' alt='AppEngine logo resized' />");
out.println("<img src='//storage.cloud.google.com/" + bucket + "/rotatedImage.jpeg' alt='AppEngine logo rotated' />");
out.println("</body></html>\n");
}
Also used :
BlobstoreService(com.google.appengine.api.blobstore.BlobstoreService)
FileChannel(java.nio.channels.FileChannel)
ImagesService(com.google.appengine.api.images.ImagesService)
Image(com.google.appengine.api.images.Image)
ByteBuffer(java.nio.ByteBuffer)
FileInputStream(java.io.FileInputStream)
BlobKey(com.google.appengine.api.blobstore.BlobKey)
GcsFileOptions(com.google.appengine.tools.cloudstorage.GcsFileOptions)
Transform(com.google.appengine.api.images.Transform)
File(java.io.File)
GcsFilename(com.google.appengine.tools.cloudstorage.GcsFilename)
PrintWriter(java.io.PrintWriter)
Example 2 with BlobstoreService
use of com.google.appengine.api.blobstore.BlobstoreService in project cryptonomica by Cryptonomica.
the class CloudStorageService method serveFileFromCloudStorage.
/*
* server file from Cloud Storage
* */
public static void serveFileFromCloudStorage(String bucketName, String objectName, String contentType, HttpServletResponse resp) throws IOException {
// GcsFilename fileName = getFileName(req);
GcsFilename fileName = new GcsFilename(bucketName, objectName);
// resp.setContentType("video/webm");
resp.setContentType(contentType);
if (SERVE_USING_BLOBSTORE_API) {
BlobstoreService blobstoreService = BlobstoreServiceFactory.getBlobstoreService();
BlobKey blobKey = blobstoreService.createGsBlobKey("/gs/" + fileName.getBucketName() + "/" + fileName.getObjectName());
blobstoreService.serve(blobKey, resp);
} else {
GcsInputChannel readChannel = gcsService.openPrefetchingReadChannel(fileName, 0, BUFFER_SIZE);
copy(Channels.newInputStream(readChannel), resp.getOutputStream());
}
}
Also used :
BlobstoreService(com.google.appengine.api.blobstore.BlobstoreService)
BlobKey(com.google.appengine.api.blobstore.BlobKey)
Example 3 with BlobstoreService
use of com.google.appengine.api.blobstore.BlobstoreService in project teammates by TEAMMATES.
the class ImageResult method send.
@Override
public void send(HttpServletRequest req, HttpServletResponse resp) throws IOException {
if (blobKey.isEmpty()) {
resp.sendRedirect(Const.SystemParams.DEFAULT_PROFILE_PICTURE_PATH);
} else {
resp.setContentType("image/png");
BlobstoreService blobstoreService = BlobstoreServiceFactory.getBlobstoreService();
blobstoreService.serve(new BlobKey(blobKey), resp);
}
}
Also used :
BlobstoreService(com.google.appengine.api.blobstore.BlobstoreService)
BlobKey(com.google.appengine.api.blobstore.BlobKey)
Example 4 with BlobstoreService
use of com.google.appengine.api.blobstore.BlobstoreService in project teammates by TEAMMATES.
the class PublicImageServlet method doPost.
@SuppressWarnings("unchecked")
@Override
public void doPost(HttpServletRequest req, HttpServletResponse resp) {
String url = HttpRequestHelper.getRequestedUrl(req);
UserType userType = new GateKeeper().getCurrentUser();
Map<String, String[]> requestParameters = req.getParameterMap();
String blobKey = HttpRequestHelper.getValueFromParamMap(requestParameters, Const.ParamsNames.BLOB_KEY);
Assumption.assertPostParamNotNull(Const.ParamsNames.BLOB_KEY, blobKey);
try {
if (blobKey.isEmpty()) {
String message = "Failed to serve image with URL : blobKey is missing";
Map<String, String[]> params = HttpRequestHelper.getParameterMap(req);
log.info(new LogMessageGenerator().generateBasicActivityLogMessage(url, params, message, userType));
resp.sendError(1, "No image found");
} else {
resp.setContentType("image/png");
BlobstoreService blobstoreService = BlobstoreServiceFactory.getBlobstoreService();
blobstoreService.serve(new BlobKey(blobKey), resp);
// TODO : restrict image request to those "public" files only
String message = "Public image request with URL: <br>" + "<a href=\"" + url + "\" target=\"_blank\" rel=\"noopener noreferrer\" >" + url + "</a>";
Map<String, String[]> params = HttpRequestHelper.getParameterMap(req);
log.info(new LogMessageGenerator().generateBasicActivityLogMessage(url, params, message, userType));
}
} catch (IOException ioe) {
Map<String, String[]> params = HttpRequestHelper.getParameterMap(req);
log.warning(new LogMessageGenerator().generateActionFailureLogMessage(url, params, ioe, userType));
} catch (Exception e) {
log.severe("Exception occured while performing " + Const.PublicActionNames.PUBLIC_IMAGE_SERVE_ACTION + ": " + TeammatesException.toStringWithStackTrace(e));
}
}
Also used :
BlobstoreService(com.google.appengine.api.blobstore.BlobstoreService)
BlobKey(com.google.appengine.api.blobstore.BlobKey)
LogMessageGenerator(teammates.common.util.LogMessageGenerator)
GateKeeper(teammates.logic.api.GateKeeper)
IOException(java.io.IOException)
UserType(teammates.common.datatransfer.UserType)
Map(java.util.Map)
IOException(java.io.IOException)
TeammatesException(teammates.common.exception.TeammatesException)
Aggregations
BlobKey (com.google.appengine.api.blobstore.BlobKey)4
BlobstoreService (com.google.appengine.api.blobstore.BlobstoreService)4
Image (com.google.appengine.api.images.Image)1
ImagesService (com.google.appengine.api.images.ImagesService)1
Transform (com.google.appengine.api.images.Transform)1
GcsFileOptions (com.google.appengine.tools.cloudstorage.GcsFileOptions)1
GcsFilename (com.google.appengine.tools.cloudstorage.GcsFilename)1
File (java.io.File)1
FileInputStream (java.io.FileInputStream)1
IOException (java.io.IOException)1
PrintWriter (java.io.PrintWriter)1
ByteBuffer (java.nio.ByteBuffer)1
FileChannel (java.nio.channels.FileChannel)1
Map (java.util.Map)1
UserType (teammates.common.datatransfer.UserType)1
TeammatesException (teammates.common.exception.TeammatesException)1
LogMessageGenerator (teammates.common.util.LogMessageGenerator)1
GateKeeper (teammates.logic.api.GateKeeper)1
