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luca0N! 2021-03-21 16:53:53 -03:00
parent 9e68143478
commit 8d561767fb
Signed by: luca0N
GPG key ID: 2E7B4655CF16D7D6
9 changed files with 511 additions and 0 deletions
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32
src/com/luca0n/dual/common/ConfigSyntaxException.java Normal file
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/*
Dual: a simple manager for custom hostnames
Copyright (C) 2021 luca0N!
This program is free software: you can redistribute it and/or modify it under
the terms of the GNU General Public License as published by the Free Software
Foundation, either version 3 of the License, or (at your option) any later
version.
This program is distributed in the hope that it will be useful, but WITHOUT
ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
You should have received a copy of the GNU General Public License along with
this program. If not, see <https://www.gnu.org/licenses/>.
Contact me by e-mail via <luca0n [at] luca0n [dot] com>.
*/
package com.luca0n.dual.common;
import java.lang.Exception;
public class ConfigSyntaxException extends Exception {
public ConfigSyntaxException(){
super();
}
public ConfigSyntaxException(String message){
super(message);
}
}

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src/com/luca0n/dual/common/Dual.java Normal file
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/*
Dual: a simple manager for custom hostnames
Copyright (C) 2021 luca0N!
This program is free software: you can redistribute it and/or modify it under
the terms of the GNU General Public License as published by the Free Software
Foundation, either version 3 of the License, or (at your option) any later
version.
This program is distributed in the hope that it will be useful, but WITHOUT
ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
You should have received a copy of the GNU General Public License along with
this program. If not, see <https://www.gnu.org/licenses/>.
Contact me by e-mail via <luca0n [at] luca0n [dot] com>.
*/
package com.luca0n.dual.common;
import java.io.IOException;
import java.nio.file.Files;
import java.nio.file.FileSystems;
import java.nio.file.Path;
import com.luca0n.dual.common.ConfigSyntaxException;
import com.luca0n.dual.common.NoSuchNamespaceException;
import com.luca0n.dual.common.NoSuchKeyException;
import com.luca0n.dual.common.UnsupportedOperatingSystemException;
import com.luca0n.dual.config.Config;
import com.luca0n.dual.config.ConfigUtil;
/**
* @version 1.0
* @since 2021-03-21
*/
public class Dual {
public static final String NAME = "Dual";
public static final String VERSION = "1.0";
private static final String AUTO_GEN_COMMENT = "This entry was auto-generated by " + NAME + ".";
public static final int VERSION_CODE = 1;
private static final String[] SUPPORTED_OPERATING_SYSTEMS = {
"Linux",
"Windows"
};
public static void main(String[] args){
try {
run();
} catch (Exception e){
e.printStackTrace();
System.exit(1);
}
}
public static void run() throws ConfigSyntaxException,
NoSuchNamespaceException, NoSuchKeyException, IOException,
UnsupportedOperatingSystemException {
// Read configuration file
Config c = ConfigUtil.fromFile(ConfigUtil.DEFAULT_CONFIG);
Config.Namespace n = c.getNamespace("Dual");
if (n == null)
throw new NoSuchNamespaceException("Could not find required namespace Dual in the default configuration file.");
String type = n.getValue("FetchType"),
source = n.getValue("Source"),
target = n.getValue("Target"),
hostsPath = n.getValue("hostsPath");
// Check for null values.
if (source == null)
throw new NoSuchKeyException("Could not find required key Dual.Source in the default configuration file.");
else if (target == null)
throw new NoSuchKeyException("Could not find required key Dual.Target in the default configuration file.");
System.out.printf("%s: All tests passed.\n", NAME);
if (type == null){
type = "Resolve";
System.out.printf("%s: WARNING: no FetchType specified. Assuming Resolve FetchType...\n", NAME);
}
System.out.printf("%s: Using %s FetchType and %s Source.\n", NAME, type, source);
System.out.printf("%s: Using %s hostname.\n", NAME, target);
// Check OS.
String os = System.getProperty("os.name");
boolean supportedOs = false;
for (String sos : SUPPORTED_OPERATING_SYSTEMS)
if (os.contains(sos)){
supportedOs = true;
break;
}
if (!supportedOs && hostsPath == null){
StringBuilder msg = new StringBuilder();
msg.append("Unsupported operating system: ")
.append(os)
.append(". ")
.append("This program must be run under ");
for (int x = 0; x < SUPPORTED_OPERATING_SYSTEMS.length; x++){
if (x == SUPPORTED_OPERATING_SYSTEMS.length - 1)
msg.append(" or ")
.append(SUPPORTED_OPERATING_SYSTEMS[x])
.append(". ");
else if (x == 0)
msg.append(SUPPORTED_OPERATING_SYSTEMS[x]);
else
msg.append(", ")
.append(SUPPORTED_OPERATING_SYSTEMS[x]);
}
msg.append("If you want to override this system requirement, please provide a path to the hosts file on your operating system.");
throw new UnsupportedOperatingSystemException(msg.toString());
}
System.out.printf(hostsPath == null ? "%s: using %s settings.\n" : "%s: using custom settings for %s.\n", NAME, os);
// Open hosts file.
if (hostsPath == null){
boolean isWindows = os.contains(SUPPORTED_OPERATING_SYSTEMS[1]);
hostsPath = isWindows ? "C:\\WINDOWS\\System32\\drivers\\etc\\hosts" : "/etc/hosts";
}
System.out.printf("%s: opening %s...\n", NAME, hostsPath);
Path path = FileSystems.getDefault().getPath(hostsPath);
byte[] fileBytes = Files.readAllBytes(path);
String[] lines = new String(fileBytes).split(System.lineSeparator());
for (String line : lines){
// Check if this line is a comment.
if (line.startsWith("#"))
// Ignore this line.
continue;
String[] contents = line.split("#")[0];
// Check if this line was auto-generated by this program.
if (contents.length == 2){
// Check line comment.
if (contents[1].equals(AUTO_GEN_COMMENT)){
// Remove this entry if we're going to replace it.
}
}
}
}
}

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src/com/luca0n/dual/common/NoSuchKeyException.java Normal file
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/*
Dual: a simple manager for custom hostnames
Copyright (C) 2021 luca0N!
This program is free software: you can redistribute it and/or modify it under
the terms of the GNU General Public License as published by the Free Software
Foundation, either version 3 of the License, or (at your option) any later
version.
This program is distributed in the hope that it will be useful, but WITHOUT
ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
You should have received a copy of the GNU General Public License along with
this program. If not, see <https://www.gnu.org/licenses/>.
Contact me by e-mail via <luca0n [at] luca0n [dot] com>.
*/
package com.luca0n.dual.common;
import java.lang.Exception;
public class NoSuchKeyException extends Exception {
public NoSuchKeyException(){
super();
}
public NoSuchKeyException(String message){
super(message);
}
}

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src/com/luca0n/dual/common/NoSuchNamespaceException.java Normal file
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/*
Dual: a simple manager for custom hostnames
Copyright (C) 2021 luca0N!
This program is free software: you can redistribute it and/or modify it under
the terms of the GNU General Public License as published by the Free Software
Foundation, either version 3 of the License, or (at your option) any later
version.
This program is distributed in the hope that it will be useful, but WITHOUT
ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
You should have received a copy of the GNU General Public License along with
this program. If not, see <https://www.gnu.org/licenses/>.
Contact me by e-mail via <luca0n [at] luca0n [dot] com>.
*/
package com.luca0n.dual.common;
import java.lang.Exception;
public class NoSuchNamespaceException extends Exception {
public NoSuchNamespaceException(){
super();
}
public NoSuchNamespaceException(String message){
super(message);
}
}

32
src/com/luca0n/dual/common/UnsupportedOperatingSystemException.java Normal file
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/*
Dual: a simple manager for custom hostnames
Copyright (C) 2021 luca0N!
This program is free software: you can redistribute it and/or modify it under
the terms of the GNU General Public License as published by the Free Software
Foundation, either version 3 of the License, or (at your option) any later
version.
This program is distributed in the hope that it will be useful, but WITHOUT
ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
You should have received a copy of the GNU General Public License along with
this program. If not, see <https://www.gnu.org/licenses/>.
Contact me by e-mail via <luca0n [at] luca0n [dot] com>.
*/
package com.luca0n.dual.common;
import java.lang.Exception;
public class UnsupportedOperatingSystemException extends Exception {
public UnsupportedOperatingSystemException(){
super();
}
public UnsupportedOperatingSystemException(String message){
super(message);
}
}