94 lines
3.2 KiB
Java
94 lines
3.2 KiB
Java
package eu.openaire.urls_controller.util;
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import org.slf4j.Logger;
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import org.slf4j.LoggerFactory;
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import org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext;
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import org.springframework.core.env.Environment;
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import java.io.BufferedReader;
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import java.io.InputStreamReader;
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import java.net.HttpURLConnection;
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import java.net.InetAddress;
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import java.net.URL;
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public class UriBuilder {
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private static final Logger logger = LoggerFactory.getLogger(UriBuilder.class);
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public static String ip = null;
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public static String baseUrl = null;
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public UriBuilder(Environment environment, ServletWebServerApplicationContext webServerAppCtxt) {
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baseUrl = "http";
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String sslEnabled = environment.getProperty("server.ssl.enabled");
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if (sslEnabled == null) { // It's expected to not exist if there is no SSL-configuration.
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logger.warn("No property \"server.ssl.enabled\" was found in \"application.yml\". Continuing with plain HTTP..");
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sslEnabled = "false";
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}
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baseUrl += sslEnabled.equals("true") ? "s" : "";
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baseUrl += "://";
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if ( (ip = getPublicIP()) == null )
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ip = InetAddress.getLoopbackAddress().getHostAddress(); // Non-null.
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baseUrl += ip + ":" + webServerAppCtxt.getWebServer().getPort();
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String baseInternalPath = environment.getProperty("server.servlet.context-path");
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if ( baseInternalPath != null ) {
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if ( !baseInternalPath.startsWith("/") )
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baseUrl += "/";
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baseUrl += baseInternalPath;
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if ( !baseInternalPath.endsWith("/") )
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baseUrl += "/";
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} else {
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logger.warn("No property \"server.servlet.context-path\" was found in \"application.yml\"!"); // Yes it's expected.
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baseUrl += "/";
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}
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logger.debug("ServerBaseURL: " + baseUrl);
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}
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private static String getPublicIP()
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{
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String publicIpAddress = "";
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HttpURLConnection conn = null;
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String urlString = "https://checkip.amazonaws.com/";
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try {
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conn = (HttpURLConnection) new URL(urlString).openConnection();
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conn.setConnectTimeout(60_000); // 1 minute
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conn.setReadTimeout(120_000); // 2 minutes
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conn.setRequestMethod("GET");
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conn.connect();
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int responseCode = conn.getResponseCode();
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if ( responseCode != 200 ) {
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logger.warn("Cannot get the publicIP address for this machine, as \"" + urlString + "\" returned the HTTP-error-code: " + responseCode);
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return null;
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}
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try ( BufferedReader bf = new BufferedReader(new InputStreamReader(conn.getInputStream()))) {
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publicIpAddress = bf.readLine().trim();
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}
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} catch (Exception e) {
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logger.warn("Cannot get the publicIP address for this machine, from \"" + urlString + "\"!", e);
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return null;
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} finally {
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if ( conn != null )
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conn.disconnect();
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}
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return publicIpAddress;
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}
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public static String getBaseUrl() {
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return baseUrl;
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}
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public static void setBaseUrl(String baseUrl) {
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UriBuilder.baseUrl = baseUrl;
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}
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}
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