play.libs.Files Maven / Gradle / Ivy
package play.libs;
import static org.apache.commons.io.FileUtils.copyInputStreamToFile;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.nio.file.NoSuchFileException;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.util.Enumeration;
import java.util.zip.ZipEntry;
import java.util.zip.ZipFile;
import java.util.zip.ZipOutputStream;
import org.apache.commons.io.FileUtils;
import org.apache.commons.io.IOUtils;
import play.Logger;
import play.exceptions.UnexpectedException;
/**
* Files utils
*/
public class Files {
/**
* Characters that are invalid in Windows OS file names (Unix only forbids '/' character)
*/
public static final char[] ILLEGAL_FILENAME_CHARS = { 34, 60, 62, 124, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18,
19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 58, 42, 63, 92, 47 };
public static final char ILLEGAL_FILENAME_CHARS_REPLACE = '_';
/**
* Indicate if two file refers to the same one
*
* @param a
* First file to compare
* @param b
* Second file to compare
* @return true is file are the same
*/
public static boolean isSameFile(File a, File b) {
if (a != null && b != null) {
Path aPath = null;
Path bPath = null;
try {
aPath = Paths.get(a.getCanonicalPath());
bPath = Paths.get(b.getCanonicalPath());
return java.nio.file.Files.isSameFile(aPath, bPath);
} catch (NoSuchFileException e) {
// As the file may not exist, we only compare path
return 0 == aPath.compareTo(bPath);
} catch (Exception e) {
Logger.error(e, "Cannot get canonical path from files");
}
}
return false;
}
/**
* Just copy a file
*
* @param from
* source of the file
* @param to
* destination file
*/
public static void copy(File from, File to) {
if (isSameFile(from, to)) {
return;
}
try {
FileUtils.copyFile(from, to);
} catch (Exception e) {
throw new RuntimeException(e);
}
}
/**
* Just delete a file. If the file is a directory, it's work.
*
* @param file
* The file to delete
* @return true if and only if the file is successfully deleted; false otherwise
*/
public static boolean delete(File file) {
if (file.isDirectory()) {
return deleteDirectory(file);
} else {
return file.delete();
}
}
/**
* Recursively delete a directory.
*
* @param path
* Path of the directory
* @return true if and only if the directory is successfully deleted; false otherwise
*/
public static boolean deleteDirectory(File path) {
if (path.exists()) {
File[] files = path.listFiles();
for (File file : files) {
if (file.isDirectory()) {
deleteDirectory(file);
} else {
file.delete();
}
}
}
return (path.delete());
}
public static boolean copyDir(File from, File to) {
try {
FileUtils.copyDirectory(from, to);
return true;
} catch (IOException e) {
return false;
}
}
public static void unzip(File from, File to) {
try {
String outDir = to.getCanonicalPath();
try (ZipFile zipFile = new ZipFile(from)) {
Enumeration entries = zipFile.entries();
while (entries.hasMoreElements()) {
ZipEntry entry = entries.nextElement();
if (entry.isDirectory()) {
new File(to, entry.getName()).mkdir();
continue;
}
File f = new File(to, entry.getName());
if (!f.getCanonicalPath().startsWith(outDir)) {
throw new IOException("Corrupted zip file");
}
f.getParentFile().mkdirs();
copyInputStreamToFile(zipFile.getInputStream(entry), f);
}
}
} catch (IOException e) {
throw new RuntimeException(e);
}
}
public static void zip(File directory, File zipFile) {
try {
try (FileOutputStream os = new FileOutputStream(zipFile)) {
try (ZipOutputStream zos = new ZipOutputStream(os)) {
zipDirectory(directory, directory, zos);
}
}
} catch (Exception e) {
throw new UnexpectedException(e);
}
}
/**
* Replace all characters that are invalid in file names on Windows or Unix operating systems with
* {@link Files#ILLEGAL_FILENAME_CHARS_REPLACE} character.
*
* This method makes sure your file name can successfully be used to write new file to disk. Invalid characters are
* listed in {@link Files#ILLEGAL_FILENAME_CHARS} array.
*
* @param fileName
* File name to sanitize
* @return Sanitized file name (new String object) if found invalid characters or same string if not
*/
public static String sanitizeFileName(String fileName) {
return sanitizeFileName(fileName, ILLEGAL_FILENAME_CHARS_REPLACE);
}
/**
* Replace all characters that are invalid in file names on Windows or Unix operating systems with passed in
* character.
*
* This method makes sure your file name can successfully be used to write new file to disk. Invalid characters are
* listed in {@link Files#ILLEGAL_FILENAME_CHARS} array.
*
* @param fileName
* File name to sanitize
* @param replacement
* character to use as replacement for invalid chars
* @return Sanitized file name (new String object) if found invalid characters or same string if not
*/
public static String sanitizeFileName(String fileName, char replacement) {
if (fileName == null || fileName.isEmpty()) {
return fileName;
}
char[] chars = fileName.toCharArray();
boolean changed = false;
for (int i = 0; i < chars.length; i++) {
char c = chars[i];
if (c < 128) {
for (char illegal : ILLEGAL_FILENAME_CHARS) {
if (c == illegal) {
chars[i] = replacement;
changed = true;
break;
}
}
}
}
return changed ? new String(chars) : fileName;
}
static void zipDirectory(File root, File directory, ZipOutputStream zos) throws Exception {
for (File item : directory.listFiles()) {
if (item.isDirectory()) {
zipDirectory(root, item, zos);
} else {
try (FileInputStream fis = new FileInputStream(item)) {
String path = item.getAbsolutePath().substring(root.getAbsolutePath().length() + 1);
ZipEntry anEntry = new ZipEntry(path);
zos.putNextEntry(anEntry);
IOUtils.copyLarge(fis, zos);
}
}
}
}
}