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/*******************************************************************************
* Copyright (C) 2022-2023 WaveMaker, Inc.
*
* 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.wavemaker.runtime.commons.file.manager;
import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.HashSet;
import java.util.List;
import java.util.Objects;
import java.util.Properties;
import java.util.Set;
import jakarta.annotation.PostConstruct;
import org.apache.commons.lang3.StringUtils;
import org.springframework.stereotype.Service;
import org.springframework.web.multipart.MultipartFile;
import com.wavemaker.commons.MessageResource;
import com.wavemaker.commons.WMRuntimeException;
import com.wavemaker.commons.io.ClassPathFile;
import com.wavemaker.commons.util.FileValidationUtils;
import com.wavemaker.commons.util.PropertiesFileUtils;
import com.wavemaker.commons.util.WMIOUtils;
import com.wavemaker.runtime.commons.util.FileUploadConstants;
@Service
public class FileServiceManager {
public Set ALLOWED_FILE_EXTENSIONS = new HashSet<>();
@PostConstruct
private void initializeAllowedFileExtensions() {
initAllowedFileExtensionsFromPropertyFile();
}
/**
* Delegate method for file service upload method. This method creates a unique file name from the filename
* if necessary.
*
* PARAMS:
* file : multipart file to be uploaded.
* relativePath : This is the relative path where file will be uploaded.
* uploadDirectory : The directory to which the file needs to be uploaded.
*
*
* @return File
* ******************************************************************************
*/
public File uploadFile(MultipartFile file, String relativePath, File uploadDirectory) throws IOException {
String originalFilename = Objects.requireNonNull(file.getOriginalFilename());
validateFileExtension(originalFilename);
File relativeUploadDirectory = getRelativeUploadDirectory(uploadDirectory, relativePath);
File outputFile = createUniqueFile(originalFilename, relativeUploadDirectory);
/* Write the file to the filesystem */
InputStream inputStream = null;
OutputStream outputStream = null;
try {
inputStream = file.getInputStream();
outputStream = new BufferedOutputStream(new FileOutputStream(outputFile));
WMIOUtils.copy(inputStream, outputStream);
} finally {
WMIOUtils.closeSilently(inputStream);
WMIOUtils.closeSilently(outputStream);
}
return outputFile;
}
/**
* Delegate method for file service upload method. This method accepts the name of the file to be uploaded,
*
* PARAMS:
* file : multipart file to be uploaded.
* targetFilename: the file name for the file to be uploaded.
* relativePath : This is the relative path where file will be uploaded.
* uploadDirectory : The directory to which the file needs to be uploaded.
*
*
* @return File
* ******************************************************************************
*/
public File uploadFile(MultipartFile file, String targetFilename, String relativePath, File uploadDirectory) throws IOException {
if (StringUtils.isBlank(targetFilename)) {
throw new WMRuntimeException(MessageResource.create("com.wavemaker.runtime.file.upload.targetFileName.cannot.be.empty"));
}
validateFileExtension(targetFilename);
File relativeUploadDirectory = getRelativeUploadDirectory(uploadDirectory, relativePath);
File outputFile = new File(relativeUploadDirectory, targetFilename);
/* Write the file to the filesystem */
InputStream inputStream = null;
OutputStream outputStream = null;
try {
inputStream = file.getInputStream();
outputStream = new BufferedOutputStream(new FileOutputStream(outputFile));
WMIOUtils.copy(inputStream, outputStream);
} finally {
WMIOUtils.closeSilently(inputStream);
WMIOUtils.closeSilently(outputStream);
}
return outputFile;
}
public File createUniqueFile(String originalFileName, File dir) {
/* Create a file object that does not point to an existing file.
* Loop through names until we find a filename not already in use */
boolean hasExtension = originalFileName.indexOf('.') != -1;
String name = (hasExtension) ?
originalFileName.substring(0, originalFileName.lastIndexOf('.')) : originalFileName;
String ext = (hasExtension) ?
originalFileName.substring(originalFileName.lastIndexOf('.')) : "";
File outputFile = new File(dir, originalFileName);
for (int i = 0; i < 10000 && outputFile.exists(); i++) {
outputFile = new File(dir, name + i + ext);
}
return outputFile;
}
/**
* This method is deprecated, instead use the method {@link FileServiceManager#listFiles(File, String)}
*/
public File[] listFiles(File uploadDirectory) throws IOException {
return listFiles(uploadDirectory, null);
}
/**
* *****************************************************************************
* NAME: listFiles
* DESCRIPTION:
* Returns a description of every file in the uploadDir.
* RETURNS array of File
* ******************************************************************************
*/
public File[] listFiles(File uploadDirectory, String relativePath) throws IOException {
File relativeUploadDirectory = getRelativeUploadDirectory(uploadDirectory, relativePath);
/*Get a list of files; ignore any filename starting with "." as these are
typically private or temporary files not for users to interact with*/
File[] files = relativeUploadDirectory.listFiles(
pathname -> !pathname.isDirectory() && (pathname.getName().indexOf('.') != 0));
if (files == null) {
throw new FileNotFoundException("Given directory " + uploadDirectory + " does not exist.");
}
return files;
}
/**
* This method is deprecated, instead use the method {@link FileServiceManager#deleteFile(String, String, File)}
*/
@Deprecated
public boolean deleteFile(String file, File uploadDirectory) {
return deleteFile(file, null, uploadDirectory);
}
/**
* *****************************************************************************
* NAME: deleteFile
* DESCRIPTION:
* Deletes the files with the given path or name. If the parameters are just file
* names, it will look for files of that name in the uploadDir. If its a full path
* will delete the file at that path IF that path is within the uploadDir.
* RETURNS boolean to indicate if success or failure of operation.
* **************************************************************************
*/
public boolean deleteFile(String file, String relativePath, File uploadDirectory) {
File relativeUploadDirectory = getRelativeUploadDirectory(uploadDirectory, relativePath);
File f = (file.startsWith("/")) ? new File(FileValidationUtils.validateFilePath(file)) : new File(relativeUploadDirectory,
FileValidationUtils.validateFilePath(file));
// verify that the path specified by the server is a valid path, and not, say,
// your operating system, or your .password file.
if (f.getAbsolutePath().indexOf(uploadDirectory.getAbsolutePath()) != 0) {
throw new WMRuntimeException(MessageResource.create("com.wavemaker.runtime.file.deletion.error"), f.getAbsolutePath());
}
return f.delete();
}
/**
* This method is deprecated, instead use the method {@link FileServiceManager#downloadFile(String, String, File)}
*/
@Deprecated
public File downloadFile(String file, File uploadDirectory) throws Exception {
return downloadFile(file, null, uploadDirectory);
}
/**
* *****************************************************************************
* NAME: downloadFile
* DESCRIPTION:
* The specified file will be downloaded to the user's computer.
* - file: filename (if the file is in uploadDir) or path
* - filename: Optional string; if used, then this is the name that the user will see
* for the downloaded file. Else its name matches whats on the server.
* PARAMS:
* file : name of the file to be uploaded.
* uploadDirectory : The directory where the file resides.
* RETURNS File
* **************************************************************************
*/
public File downloadFile(String file, String relativePath, File uploadDirectory) throws Exception {
File relativeUploadDirectory = getRelativeUploadDirectory(uploadDirectory, relativePath);
File f = (file.startsWith("/")) ? new File(FileValidationUtils.validateFilePath(file)) : new File(relativeUploadDirectory,
FileValidationUtils.validateFilePath(file));
// verify that the path specified by the server is a valid path, and not, say,
// your .password file.
if (f.getAbsolutePath().indexOf(uploadDirectory.getAbsolutePath()) != 0) {
throw new Exception("File not in uploadDir");
}
if (!f.exists()) {
throw new Exception("File with name " + file + " not found");
}
if (!f.isFile()) {
throw new Exception("Is a directory");
}
return f;
}
private File getRelativeUploadDirectory(File uploadDirectory, String relativePath) {
File relativeUploadDirectory = uploadDirectory;
if (StringUtils.isNotBlank(relativePath)) {
relativePath = relativePath.trim();
if (!relativePath.endsWith("/")) {
relativePath = relativePath + "/";
}
relativeUploadDirectory = new File(uploadDirectory.getAbsolutePath(),
FileValidationUtils.validateFilePath(relativePath));
/* Find our upload directory, make sure it exists */
if (!relativeUploadDirectory.exists()) {
relativeUploadDirectory.mkdirs();
}
}
return relativeUploadDirectory;
}
private void validateFileExtension(String fileName) {
String fileExtension = getFileExtension(fileName);
if (!ALLOWED_FILE_EXTENSIONS.contains(fileExtension) && !ALLOWED_FILE_EXTENSIONS.contains("*/*")) {
throw new WMRuntimeException(MessageResource.create("com.wavemaker.runtime.file.upload.extension$not_allowed"));
}
}
private void initAllowedFileExtensionsFromPropertyFile() {
ClassPathFile file = new ClassPathFile(Thread.currentThread().getContextClassLoader(), FileUploadConstants.APP_PROPERTIES_FILE);
Properties properties = PropertiesFileUtils.loadFromXml(file);
String allowedFileUploadExtensions = properties.getProperty("allowedFileUploadExtensions",
FileUploadConstants.DEFAULT_ALLOWED_FILE_UPLOAD_EXTENSIONS);
String[] extensionsList = allowedFileUploadExtensions.split(",");
for (String extension : extensionsList) {
extension = extension.trim().toLowerCase();
if (extension.startsWith(".")) {
ALLOWED_FILE_EXTENSIONS.add(extension.substring(1));
} else {
switch (extension) {
case "*/*":
ALLOWED_FILE_EXTENSIONS.clear();
ALLOWED_FILE_EXTENSIONS.add("*/*");
return;
case "image/*":
ALLOWED_FILE_EXTENSIONS.addAll(List.of(FileUploadConstants.SUPPORTED_IMAGE_EXTENSIONS.split(",")));
break;
case "audio/*":
ALLOWED_FILE_EXTENSIONS.addAll(List.of(FileUploadConstants.SUPPORTED_AUDIO_EXTENSIONS.split(",")));
break;
case "video/*":
ALLOWED_FILE_EXTENSIONS.addAll(List.of(FileUploadConstants.SUPPORTED_VIDEO_EXTENSIONS.split(",")));
break;
default:
ALLOWED_FILE_EXTENSIONS.add(extension);
break;
}
}
}
}
private String getFileExtension(String fileName) {
return StringUtils.substringAfterLast(fileName, ".").toLowerCase();
}
}
