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the action can't be completed because the file is open in openjdk platform binary spring boot

Hey I'm trying to delete a image (file) but I can't :(
That how I upload the image:
try {
List<String> imagesPaths = new ArrayList<>();
for (String image : imagesBytes)
{
String base64Image = image.split(",")[1];
byte[] imageByte = javax.xml.bind.DatatypeConverter.parseBase64Binary(base64Image);
String folder = "C:/images/" + LoggedInUser.UserId();
File newDirectory = new File(folder);
if (!newDirectory.exists())
{
newDirectory.mkdirs();
}
long timeMilli = new Date().getTime();
String imageType = image.substring("data:image/".length(), image.indexOf(";base64"));
String path = timeMilli + "." + imageType;
Files.write(Paths.get(folder, path), imageByte);
String newPath = LoggedInUser.UserId() + "/" + path;
imagesPaths.add(newPath);
}
logger.debug("uploadImages() in ImageService Ended by " + LoggedInUser.UserName());
return new ResponseEntity<>(imagesPaths, HttpStatus.OK);
} catch (Exception e) {
throw new ApiRequestException(e.getMessage());
}
And this how I delete it :
List<ImageJpa> images = imageRepository.findByStatus(Image.UNUSED.status);
System.out.println(images.size() + ": Images are not used");
images.forEach(image -> {
String imagePath = "C:/images/" + image.getPath();
System.out.println(imagePath);
File imagePathFile = new File(imagePath);
if (imagePathFile.exists())
{
boolean isDeleted = imagePathFile.delete();
if (isDeleted)
{
imageRepository.deleteById(image.getId());
System.out.println("Deleted the file: " + imagePathFile.getName());
} else {System.out.println("Failed to delete the file. :" + imagePathFile.getName());}
}else {
System.out.println("Already Deleted");
}
});
Always I got (Failed to delete the file ...)
Note : The image will deleted if I ReRender the the project again or close and open the IDE.

The problem was on other function :\
I was open the files after save it without CLOSE the connection after it !
This one what was messing on the read files
inputStream.close();

In email attachment any type of document file is sent with File extension instead of coreect extension

I am fetching S3 objects and then sending the object in email as an attachment. I am saving the contents in a temporary file. For images the code is working fine but in case of documents (pdf, docx, csv) files the attachments are sent without extension so they are not accessible.
try {
fullObject = s3Client.getObject(new GetObjectRequest(bucketName, key));
System.out.println("fullObject: " + fullObject);
ObjectMetadata metadata = fullObject.getObjectMetadata();
System.out.println(" meta data type: " + metadata.getContentType());
InputStream inputStream = fullObject.getObjectContent();
String extension = fullObject.getKey();
int index = extension.lastIndexOf('.');
if(index > 0) {
extension = extension.substring(index + 1);
System.out.println("File extension is " + extension);
}
File file = File.createTempFile(key, "."+ extension );
System.out.println("file: "+ file);
try (OutputStream outputStream = new FileOutputStream(file)) {
IOUtils.copy(inputStream, outputStream);
} catch (Exception e) {
System.out.println("error in copying data from one file to another");
}
dataSource = new FileDataSource(file);
System.out.println("added datasource in the list");
attachmentsList.add(dataSource);
}

Upon going through this code, I got to know that the issue was not in this code but when I was setting the name of the File. I was setting filename without any extension, for example I set Filename as "temporary" this caused the documents to be saved with tmp extension. All I had to do was add the extension of the object with its name ("temporary.docx"), this solved the issue and attachments were sent properly and were accessible.

Java Azure Function - upload file in BLOB Container

I'm trying to make an Azure Function in Java. I need to make an excel file and upload it in BLOB container.
When I build the project and the tests start, then it works without problems and it uploads the file in the container, when instead I debug the project or I deploy it on Azure and I run it via internet (calling the service), it doesn't upload it. It blocks when it tries to upload the file.
Can you help me please? I'm on this problem since a few days.
Thank you.
I attach the method where it uploads the file:
#FunctionName("FunctionTest")
public HttpResponseMessage run(
#HttpTrigger(
name = "req",
methods = {HttpMethod.GET, HttpMethod.POST},
authLevel = AuthorizationLevel.ANONYMOUS)
HttpRequestMessage<Optional<String>> request,
final ExecutionContext context) {
context.getLogger().info("Java HTTP trigger processed a request.");
final String queryAccountName = request.getQueryParameters().get("AccountName");
String accountName = request.getBody().orElse(queryAccountName);
final String queryAccountKey = request.getQueryParameters().get("AccountKey");
String accountKey = request.getBody().orElse(queryAccountKey);
context.getLogger().info("Azure Blob storage v12 - Java quickstart sample\n");
// Retrieve the connection string for use with the application. The storage
// connection string is stored in an environment variable on the machine
// running the application called AZURE_STORAGE_CONNECTION_STRING. If the environment variable
// is created after the application is launched in a console or with
// Visual Studio, the shell or application needs to be closed and reloaded
// to take the environment variable into account.
// String connectStr = System.getenv("AZURE_STORAGE_CONNECTION_STRING");
//String connectStr = "DefaultEndpointsProtocol=https;AccountName="+accountName+";AccountKey="+accountKey+";EndpointSuffix=core.windows.net";
// Create a BlobServiceClient object which will be used to create a container client
//BlobServiceClient blobServiceClient = new BlobServiceClientBuilder().connectionString(connectStr).buildClient();
StorageSharedKeyCredential credential = new StorageSharedKeyCredential(accountName, accountKey);
String endpoint = String.format(Locale.ROOT, "https://%s.blob.core.windows.net", accountName);
BlobServiceClient blobServiceClient = new BlobServiceClientBuilder().endpoint(endpoint).credential(credential).buildClient();
//Create a unique name for the container
String containerName = "container-name";
// Create the container and return a container client object
//BlobContainerClient containerClient = blobServiceClient.createBlobContainer(containerName);
BlobContainerClient containerClient = blobServiceClient.getBlobContainerClient(containerName);
// Create a local file in the ./data/ directory for uploading and downloading
/*String pathFile = "./data/";
String fileName = "quickstart" + java.util.UUID.randomUUID() + ".txt";
File localFile = new File(pathFile + fileName);
// Write text to the file
FileWriter writer;
try {
writer = new FileWriter(pathFile + fileName, true);
writer.write("Hello, World!");
writer.close();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}*/
// Get a reference to a blob
// Upload the blob
String pathFile = System.getenv("TEMP") + "\\";
String fileName = creaReport(context)+".xlsx"; // creating file Excel - IT DOESN'T EVEN WORK WITH TXT FILE
BlobClient blobClient = containerClient.getBlobClient(fileName);
System.out.println("\nUploading to Blob storage as blob:\n\t" + blobClient.getBlobUrl());
blobClient.uploadFromFile(pathFile + fileName, true); // IT BLOCKS HERE
System.out.println("\nListing blobs...");
// List the blob(s) in the container.
for (BlobItem blobItem : containerClient.listBlobs()) {
System.out.println("\t" + blobItem.getName());
}
// Download the blob to a local file
// Append the string "DOWNLOAD" before the .txt extension so that you can see both files.
//String downloadFileName = fileName.replace(".txt", "DOWNLOAD.txt");
String downloadFileName = fileName.replace(".xlsx", "DOWNLOAD.xlsx");
File downloadedFile = new File(pathFile + downloadFileName);
System.out.println("\nDownloading blob to\n\t " + pathFile + downloadFileName);
blobClient.downloadToFile(pathFile + downloadFileName, true);
// Clean up
System.out.println("\nPress the Enter key to begin clean up");
System.console().readLine();
/*System.out.println("Deleting blob container...");
containerClient.delete();*/
System.out.println("Deleting the local source and downloaded files...");
localFile.delete();
downloadedFile.delete();
System.out.println("Done");
return request.createResponseBuilder(HttpStatus.OK).body("Blob uploaded").build();
}

For this problem, I test it in my side and summarize the point as below:
The reason for this problem is the files in local/temp are not shared among site instances. You can refer to this page.
So I met the same problem as you, I deploy my java function to azure and add a file under local/temp path manually. Then run the function, it can't access the data of the file.
After that, I edit my function code. Create a txt file by the code below in my function:
String filePath="d:\\local\\Temp\\test1.txt";
File file = new File(filePath);
try {
FileWriter writer = new FileWriter(file);
writer.write("Test data");
writer.close();
} catch (IOException e1) {
context.getLogger().info(e1.getMessage());
e1.printStackTrace();
}
And then read the file in the same function by the code below:
InputStream is = null;
int i;
char c;
try {
is = new FileInputStream(filePath);
while ((i = is.read()) != -1) {
c = (char) i;
context.getLogger().info("===inputstream==" + c);
}
} catch (Exception e) {
context.getLogger().info("===try catch error");
e.printStackTrace();
} finally {
if (is != null) {
try {
is.close();
} catch (IOException e) {
context.getLogger().info("===finally error");
e.printStackTrace();
}
}
}
Deploy the code to azure, the function app run in a consumption plan(so it will just use one instance if I just run it once). Running it, I read the data of the file success.
According to the test above, I suggest you do not create the file in local/temp. You'd better create the file in d:\home\site\wwwroot, you can create a folder under wwwroot and create the files in the folder. I test it works fine.
Hope it helps~

How to preserve date modified when retrieving file using Apache FTPClient?

I am using org.apache.commons.net.ftp.FTPClient for retrieving files from a ftp server. It is crucial that I preserve the last modified timestamp on the file when its saved on my machine. Do anyone have a suggestion for how to solve this?

This is how I solved it:
public boolean retrieveFile(String path, String filename, long lastModified) throws IOException {
File localFile = new File(path + "/" + filename);
OutputStream outputStream = new FileOutputStream(localFile);
boolean success = client.retrieveFile(filename, outputStream);
outputStream.close();
localFile.setLastModified(lastModified);
return success;
}
I wish the Apache-team would implement this feature.
This is how you can use it:
List<FTPFile> ftpFiles = Arrays.asList(client.listFiles());
for(FTPFile file : ftpFiles) {
retrieveFile("/tmp", file.getName(), file.getTimestamp().getTime());
}

You can modify the timestamp after downloading the file.
The timestamp can be retrieved through the LIST command, or the (non standard) MDTM command.
You can see here how to do modify the time stamp: that: http://www.mkyong.com/java/how-to-change-the-file-last-modified-date-in-java/

When download list of files, like all files returned by by FTPClient.mlistDir or FTPClient.listFiles, use the timestamp returned with the listing to update timestemp of local downloaded files:
String remotePath = "/remote/path";
String localPath = "C:\\local\\path";
FTPFile[] remoteFiles = ftpClient.mlistDir(remotePath);
for (FTPFile remoteFile : remoteFiles) {
File localFile = new File(localPath + "\\" + remoteFile.getName());
OutputStream outputStream = new BufferedOutputStream(new FileOutputStream(localFile));
if (ftpClient.retrieveFile(remotePath + "/" + remoteFile.getName(), outputStream))
{
System.out.println("File " + remoteFile.getName() + " downloaded successfully.");
}
outputStream.close();
localFile.setLastModified(remoteFile.getTimestamp().getTimeInMillis());
}
When downloading a single specific file only, use FTPClient.mdtmFile to retrieve the remote file timestamp and update timestamp of the downloaded local file accordingly:
File localFile = new File("C:\\local\\path\\file.zip");
FTPFile remoteFile = ftpClient.mdtmFile("/remote/path/file.zip");
if (remoteFile != null)
{
OutputStream outputStream = new BufferedOutputStream(new FileOutputStream(localFile));
if (ftpClient.retrieveFile(remoteFile.getName(), outputStream))
{
System.out.println("File downloaded successfully.");
}
outputStream.close();
localFile.setLastModified(remoteFile.getTimestamp().getTimeInMillis());
}

downloaded zip file returns zero has 0 bytes as size

I have written a Java web application that allows a user to download files from a server. These files are quite large and so are zipped together before download.
It works like this:
1. The user gets a list of files that match his/her criteria
2. If the user likes a file and wants to download he/she selects it by checking a checkbox
3. The user then clicks "download"
4. The files are then zipped and stored on a servera
5. The user this then presented with a page which contains a link to the downloadable zip filea
6. However on downloading the zip file the file that is downloaded is 0 bytes in sizea
I have checked the remote server and the zip file is being created properly, all that is left is to serve the file the user somehow, can you see where I might be going wrong, or suggest a better way to serve the zip file.
The code that creates the link is:
<%
String zipFileURL = (String) request.getAttribute("zipFileURL"); %>
<p>Zip File Link</p>
The code that creates the zipFileURL variable is:
public static String zipFiles(ArrayList<String> fileList, String contextRootPath) {
//time-stamping
Date date = new Date();
Timestamp timeStamp = new Timestamp(date.getTime());
Iterator fileListIterator = fileList.iterator();
String zipFileURL = "";
try {
String ZIP_LOC = contextRootPath + "WEB-INF" + SEP + "TempZipFiles" + SEP;
BufferedInputStream origin = null;
zipFileURL = ZIP_LOC
+ "FITS." + timeStamp.toString().replaceAll(":", ".").replaceAll(" ", ".") + ".zip";
FileOutputStream dest = new FileOutputStream(ZIP_LOC
+ "FITS." + timeStamp.toString().replaceAll(":", ".").replaceAll(" ", ".") + ".zip");
ZipOutputStream out = new ZipOutputStream(new BufferedOutputStream(
dest));
// out.setMethod(ZipOutputStream.DEFLATED);
byte data[] = new byte[BUFFER];
while(fileListIterator.hasNext()) {
String fileName = (String) fileListIterator.next();
System.out.println("Adding: " + fileName);
FileInputStream fi = new FileInputStream(fileName);
origin = new BufferedInputStream(fi, BUFFER);
ZipEntry entry = new ZipEntry(fileName);
out.putNextEntry(entry);
int count;
while ((count = origin.read(data, 0, BUFFER)) != -1) {
out.write(data, 0, count);
}
origin.close();
}
out.close();
} catch (Exception e) {
e.printStackTrace();
}
return zipFileURL;
}

A URL cannot access any files (directly) under WEB-INF. I'd suggest using a servlet to return the file from whatever location it was saved to
Would also suggest saving the file outside the context of your webapp