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ConfigFile.java
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package javaxt.express;
import javaxt.json.JSONObject;
import javaxt.encryption.AES256;
//******************************************************************************
//** ConfigFile
//******************************************************************************
/**
* Used to access and save configuration information stored in a JSON file.
* Provides an option to encrypt the JSON file.
*
******************************************************************************/
public class ConfigFile {
private javaxt.io.File file;
private JSONObject config;
//**************************************************************************
//** Constructor
//**************************************************************************
public ConfigFile(javaxt.io.File file){
this.file = file;
}
//**************************************************************************
//** Constructor
//**************************************************************************
public ConfigFile(String path){
this(new javaxt.io.File(path));
}
//**************************************************************************
//** exists
//**************************************************************************
/** Returns true if the file exists.
*/
public boolean exists(){
return file.exists();
}
//**************************************************************************
//** getDirectory
//**************************************************************************
public javaxt.io.Directory getDirectory(){
return file.getDirectory();
}
//**************************************************************************
//** delete
//**************************************************************************
/** Used to delete the config file, if it exists.
*/
public void delete(){
file.delete();
}
//**************************************************************************
//** getConfig
//**************************************************************************
/** Returns the current config (json document).
*/
public JSONObject getConfig(){
if (config==null) config = file.getJSONObject();
return config;
}
//**************************************************************************
//** getConfig
//**************************************************************************
/** Used to decrypt and parse a config file (json document).
*/
public JSONObject getConfig(String username, String password)
throws java.security.InvalidKeyException, Exception {
if (config==null) config = new JSONObject(
AES256.decrypt(
file.getBytes().toByteArray(),
generatePassword(username, password)
)
);
return config;
}
//**************************************************************************
//** save
//**************************************************************************
/** Used to save the config file.
*/
public void save(){
file.write(getConfig());
}
//**************************************************************************
//** save
//**************************************************************************
/** Used to encrypt and save the config file.
*/
public void save(String username, String password)
throws java.security.InvalidKeyException, Exception {
save(getConfig(), username, password);
}
//**************************************************************************
//** save
//**************************************************************************
/** Used to encrypt and save the config file.
*/
public void save(JSONObject config, String username, String password)
throws java.security.InvalidKeyException, Exception {
file.write(AES256.encrypt(
config.toString(),
generatePassword(username, password)
)
);
}
//**************************************************************************
//** generatePassword
//**************************************************************************
/** Used to generate a password/key used to encrypt/decrypt a config file.
*/
private static String generatePassword(String username, String password) throws Exception {
return ( javaxt.utils.Base64.encode(
(username + "/" + password).getBytes("UTF-8")
));
}
//**************************************************************************
//** updateDir
//**************************************************************************
/** Used to update a path to a directory defined in the config file.
* Resolves both canonical and relative paths (relative to the configFile).
*/
public void updateDir(String key, boolean create){
updateDir(key, getConfig(), file, create);
}
//**************************************************************************
//** updateDir
//**************************************************************************
/** Used to update a path to a directory defined in a given config. Resolves
* both canonical and relative paths (relative to the configFile).
*/
public void updateDir(String key, JSONObject config, boolean create){
updateDir(key, config, file, create);
}
//**************************************************************************
//** updateDir
//**************************************************************************
/** Used to update a path to a directory defined in a given config. Resolves
* both canonical and relative paths (relative to the configFile).
*/
public static void updateDir(String key, JSONObject config, javaxt.io.File configFile, boolean create){
if (config!=null && config.has(key)){
String path = config.get(key).toString();
if (path==null){
config.remove(key);
}
else{
path = path.trim();
if (path.length()==0){
config.remove(key);
}
else{
//Get directory
javaxt.io.Directory dir;
if (isRelativePath(path)){
path = configFile.MapPath(path);
dir = new javaxt.io.Directory(new java.io.File(path));
}
else{
dir = new javaxt.io.Directory(path);
}
//Get canonical path
if (dir.exists()){
try{
javaxt.io.Directory d = new javaxt.io.Directory(dir.toFile().getCanonicalFile());
if (!dir.toString().equals(d.toString())){
dir = d;
}
}
catch(Exception e){}
}
//Create directory as needed
if (!dir.exists() && create) dir.create();
//Update config
if (dir.exists()){
config.set(key, dir.toString());
}
else{
config.remove(key);
}
}
}
}
}
//**************************************************************************
//** updateFile
//**************************************************************************
/** Used to update a path to a file defined in the config file. Resolves
* both canonical and relative paths (relative to the configFile).
*/
public void updateFile(String key){
updateFile(key, getConfig(), file);
}
//**************************************************************************
//** updateFile
//**************************************************************************
/** Used to update a path to a file defined a given config. Resolves both
* canonical and relative paths (relative to the configFile).
*/
public void updateFile(String key, JSONObject config){
updateFile(key, config, file);
}
//**************************************************************************
//** updateFile
//**************************************************************************
/** Used to update a path to a file defined in a config. Resolves both
* canonical and relative paths (relative to a configFile).
*/
public static void updateFile(String key, JSONObject config, javaxt.io.File configFile){
if (config.has(key)){
String path = config.get(key).toString();
if (path==null){
config.remove(key);
}
else{
path = path.trim();
if (path.length()==0){
config.remove(key);
}
else{
//Get file
javaxt.io.File file = getFile(path, configFile);
//Get canonical path
if (file.exists()){
try{
javaxt.io.File f = new javaxt.io.File(file.toFile().getCanonicalFile());
if (!file.toString().equals(f.toString())){
file = f;
}
}
catch(Exception e){}
}
//Update config
config.set(key, file.toString());
}
}
}
}
//**************************************************************************
//** getFile
//**************************************************************************
/** Returns a File for a given path. Resolves both canonical and relative
* paths (relative to the given file).
* @param path Full canonical path or a relative path
* @param file If a relative path is given, the path is resolved to the
* given file
*/
public static javaxt.io.File getFile(String path, javaxt.io.File file){
if (isRelativePath(path)){
return new javaxt.io.File(file.MapPath(path));
}
else{
return new javaxt.io.File(path);
}
}
//**************************************************************************
//** isRelativePath
//**************************************************************************
/** Returns true is the given path appears to be relative
*/
private static boolean isRelativePath(String path){
path = path.replace("\\", "/");
if (path.startsWith("/")) return false;
if (System.getProperty("os.name").toLowerCase().startsWith("windows")){
if (path.indexOf(":")==1) return false;
}
return true;
}
}