package com.trafficaudit.system.controller;
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import com.trafficaudit.common.Result;
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import org.springframework.core.io.ClassPathResource;
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import org.springframework.web.bind.annotation.GetMapping;
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import org.springframework.web.bind.annotation.RequestMapping;
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import org.springframework.web.bind.annotation.RestController;
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import java.io.InputStream;
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import java.net.URI;
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import java.nio.file.Files;
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import java.nio.file.Path;
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import java.nio.file.Paths;
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import java.util.LinkedHashMap;
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import java.util.Map;
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import java.util.Properties;
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/**
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* Exposes the product version so the UI (and operators) can confirm which build
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* is actually running on a server. Kept public on purpose: the login page shows
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* the version before any token exists.
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*/
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@RestController
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@RequestMapping("/api")
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public class VersionController {
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private static final String VERSION_FILE = "app-version.properties";
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@GetMapping("/version")
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public Result<Map<String, Object>> version() {
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Map<String, Object> info = new LinkedHashMap<>();
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info.put("version", readVersion());
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info.put("buildTime", resolveBuildTime());
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return Result.ok(info);
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}
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private String readVersion() {
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try (InputStream in = new ClassPathResource(VERSION_FILE).getInputStream()) {
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Properties props = new Properties();
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props.load(in);
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String value = props.getProperty("version");
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return value == null || value.trim().isEmpty() ? "unknown" : value.trim();
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} catch (Exception e) {
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return "unknown";
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}
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}
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/**
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* Build time of the running artifact. In a packaged run this is the jar file's
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* last-modified time; when running from exploded classes (mvn spring-boot:run)
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* there is no jar, so the value is null.
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*/
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private String resolveBuildTime() {
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try {
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URI location = VersionController.class.getProtectionDomain()
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.getCodeSource().getLocation().toURI();
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Path path = resolveArtifactPath(location);
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if (path != null && Files.isRegularFile(path)) {
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return Files.getLastModifiedTime(path).toInstant().toString();
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}
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} catch (Exception ignored) {
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// Fall through: build time is optional information.
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}
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return null;
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}
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/**
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* Spring Boot executable jars expose a nested classpath such as
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* "jar:file:/app.jar!/BOOT-INF/classes!/". Strip the nested part before
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* asking the filesystem for the jar timestamp.
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*/
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private Path resolveArtifactPath(URI location) {
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String value = location.toString();
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int nested = value.indexOf("!/");
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if (nested >= 0) {
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value = value.substring(0, nested);
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}
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if (value.startsWith("jar:")) {
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value = value.substring(4);
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}
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return Paths.get(URI.create(value));
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}
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}
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