Add Example
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Example/pom.xml
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71
Example/pom.xml
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<?xml version="1.0" encoding="UTF-8"?>
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<project xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
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xmlns="http://maven.apache.org/POM/4.0.0"
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xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
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<modelVersion>4.0.0</modelVersion>
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<groupId>me.braydon</groupId>
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<artifactId>Example</artifactId>
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<version>1.0.0</version>
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<properties>
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<java.version>17</java.version>
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<maven.compiler.source>${java.version}</maven.compiler.source>
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<maven.compiler.target>${java.version}</maven.compiler.target>
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<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
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</properties>
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<build>
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<plugins>
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<plugin>
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<groupId>org.apache.maven.plugins</groupId>
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<artifactId>maven-compiler-plugin</artifactId>
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<version>3.8.1</version>
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<configuration>
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<source>${java.version}</source>
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<target>${java.version}</target>
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</configuration>
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</plugin>
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<plugin>
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<groupId>org.apache.maven.plugins</groupId>
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<artifactId>maven-shade-plugin</artifactId>
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<version>3.1.0</version>
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<executions>
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<execution>
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<phase>package</phase>
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<goals>
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<goal>shade</goal>
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</goals>
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</execution>
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</executions>
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</plugin>
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</plugins>
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</build>
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<dependencies>
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<!-- Lombok -->
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<dependency>
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<groupId>org.projectlombok</groupId>
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<artifactId>lombok</artifactId>
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<version>1.18.28</version>
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<scope>provided</scope>
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</dependency>
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<!-- Gson -->
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<dependency>
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<groupId>com.google.code.gson</groupId>
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<artifactId>gson</artifactId>
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<version>2.10.1</version>
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<scope>compile</scope>
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</dependency>
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<!-- Oshi -->
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<dependency>
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<groupId>com.github.oshi</groupId>
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<artifactId>oshi-core</artifactId>
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<version>6.4.2</version>
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<scope>compile</scope>
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</dependency>
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</dependencies>
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</project>
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225
Example/src/main/java/me/braydon/example/LicenseExample.java
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225
Example/src/main/java/me/braydon/example/LicenseExample.java
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package me.braydon.example;
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import com.google.gson.Gson;
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import com.google.gson.GsonBuilder;
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import com.google.gson.JsonElement;
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import com.google.gson.JsonObject;
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import lombok.AllArgsConstructor;
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import lombok.Getter;
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import lombok.NonNull;
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import lombok.ToString;
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import oshi.SystemInfo;
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import oshi.hardware.CentralProcessor;
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import oshi.hardware.ComputerSystem;
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import oshi.hardware.HardwareAbstractionLayer;
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import oshi.software.os.OperatingSystem;
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import java.io.*;
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import java.net.HttpURLConnection;
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import java.net.URL;
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import java.nio.charset.StandardCharsets;
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import java.util.HashMap;
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import java.util.Map;
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/**
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* An example of how to interact
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* with the license server. This
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* can be conveniently used in
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* any project by simply copying
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* the class into your project.
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*
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* @author Braydon
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* @see <a href="https://git.rainnny.club/Rainnny/LicenseServer">License Server</a>
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* TODO: Convert to okhttp?
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*/
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public final class LicenseExample {
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/**
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* The endpoint to check licenses at.
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*/
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private static final String CHECK_ENDPOINT = "http://localhost:7500/check";
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/**
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* The {@link Gson} instance to use.
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*/
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private static final Gson GSON = new GsonBuilder()
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.serializeNulls()
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.create();
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@NonNull
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public static LicenseResponse check(@NonNull String key, @NonNull String product) {
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String hardwareId = getHardwareId(); // Get the machine's hardware id
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// Build the body
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Map<String, Object> body = new HashMap<>();
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body.put("key", key);
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body.put("product", product);
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body.put("hwid", hardwareId);
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String bodyJson = GSON.toJson(body); // The json body
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HttpURLConnection connection = null;
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int responseCode = -1; // The response code
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try {
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// Try and send the request to the server
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connection = (HttpURLConnection) new URL(CHECK_ENDPOINT).openConnection();
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connection.setRequestMethod("POST"); // Sending a POST request
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connection.setRequestProperty("Content-Type", "application/json"); // We want JSON as the response
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connection.setDoOutput(true); // We want to send a body
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// Write the body to the connection
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try (OutputStream outputStream = connection.getOutputStream()) {
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byte[] input = bodyJson.getBytes(StandardCharsets.UTF_8);
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outputStream.write(input, 0, input.length);
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}
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responseCode = connection.getResponseCode(); // Get the response code
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// If the response code is OK, we can read the response
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if (responseCode == HttpURLConnection.HTTP_OK) {
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try (InputStream inputStream = connection.getInputStream();
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InputStreamReader inputStreamReader = new InputStreamReader(inputStream);
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BufferedReader reader = new BufferedReader(inputStreamReader)
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) {
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// Read the response
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StringBuilder response = new StringBuilder();
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String line;
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while ((line = reader.readLine()) != null) {
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response.append(line);
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}
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// Parse the response as JSON
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JsonObject json = GSON.fromJson(response.toString(), JsonObject.class);
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JsonElement description = json.get("description");
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JsonElement ownerSnowflake = json.get("ownerSnowflake");
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JsonElement ownerName = json.get("ownerName");
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JsonElement duration = json.get("duration");
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return new LicenseResponse(200, null,
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description.isJsonNull() ? null : description.getAsString(),
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ownerSnowflake.isJsonNull() ? -1 : ownerSnowflake.getAsLong(),
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ownerName.isJsonNull() ? null : ownerName.getAsString(),
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duration.isJsonNull() ? -1 : duration.getAsLong()
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);
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}
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} else { // Otherwise, the request failed
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// Check if the response has an error message in JSON format
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try (InputStream errorStream = connection.getErrorStream()) {
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if (errorStream != null) { // Read the error response
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try (InputStreamReader errorStreamReader = new InputStreamReader(errorStream);
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BufferedReader errorReader = new BufferedReader(errorStreamReader)
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) {
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StringBuilder errorResponse = new StringBuilder();
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String errorLine;
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while ((errorLine = errorReader.readLine()) != null) {
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errorResponse.append(errorLine);
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}
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// Parse the error response as JSON
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JsonObject jsonError = GSON.fromJson(errorResponse.toString(), JsonObject.class);
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JsonElement errorMessage = jsonError.get("error");
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if (!errorMessage.isJsonNull()) { // If the error message isn't null, we can return it
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return new LicenseResponse(responseCode, errorMessage.getAsString());
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}
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}
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}
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}
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}
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} catch (IOException ex) {
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ex.printStackTrace();
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} finally {
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// Close the connection if it's open
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if (connection != null) {
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connection.disconnect();
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}
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}
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// Didn't find an error message, return an unknown error
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return new LicenseResponse(responseCode, "An unknown error occurred");
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}
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/**
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* Get the unique hardware
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* identifier of this machine.
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*
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* @return the hardware id
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*/
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@NonNull
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private static String getHardwareId() {
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SystemInfo systemInfo = new SystemInfo();
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OperatingSystem operatingSystem = systemInfo.getOperatingSystem();
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HardwareAbstractionLayer hardwareAbstractionLayer = systemInfo.getHardware();
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CentralProcessor centralProcessor = hardwareAbstractionLayer.getProcessor();
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ComputerSystem computerSystem = hardwareAbstractionLayer.getComputerSystem();
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// Retrieve necessary hardware information
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String vendor = operatingSystem.getManufacturer();
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String processorSerialNumber = computerSystem.getSerialNumber();
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String uuid = computerSystem.getHardwareUUID();
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String processorIdentifier = centralProcessor.getProcessorIdentifier().getIdentifier();
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int processors = centralProcessor.getLogicalProcessorCount();
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// Generate a unique hardware id using the retrieved information
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return String.format("%08x", vendor.hashCode()) + "-"
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+ String.format("%08x", processorSerialNumber.hashCode()) + "-"
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+ String.format("%08x", uuid.hashCode()) + "-"
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+ String.format("%08x", processorIdentifier.hashCode()) + "-" + processors;
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}
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@AllArgsConstructor
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@Getter
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@ToString
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public static class LicenseResponse {
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/**
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* The status code of the response.
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*/
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private final long status;
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/**
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* The error in the response, null if none.
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*/
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private String error;
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/**
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* The description of the license, present if valid.
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*/
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private String description;
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/**
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* The Discord snowflake of the license owner, present
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* if valid and there is an owner.
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*/
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private long ownerSnowflake;
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/**
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* The Discord name of the license owner, present
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* if valid and there is an owner.
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*/
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private String ownerName;
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/**
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* The duration of the license, present if valid.
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* <p>
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* If -1, the license will be permanent.
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* </p>
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*/
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private long duration;
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public LicenseResponse(long status, @NonNull String error) {
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this.status = status;
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this.error = error;
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}
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/**
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* Check if the license is valid.
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*
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* @return true if valid, otherwise false
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*/
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public boolean isValid() {
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return status == 200;
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}
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/**
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* Check if the license is permanent.
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*
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* @return true if permanent, otherwise false
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*/
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public boolean isPermanent() {
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return duration == -1;
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}
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}
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}
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