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Active IQ Unified Manager 9.11
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Ciao API server

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Il Hello API server è un programma di esempio che dimostra come richiamare un'API REST in Active IQ Unified Manager utilizzando un semplice client REST. Il programma di esempio fornisce informazioni di base sul server API nel formato JSON (il server supporta solo tale funzione) application/json formato).

L'URI utilizzato è: https://<hostname>/api/datacenter/svm/svms. Questo codice di esempio utilizza i seguenti parametri di input:

  • L'indirizzo IP o FQDN del server API

  • Opzionale: Numero di porta (impostazione predefinita: 443)

  • Nome utente

  • Password

  • Formato di risposta (application/json)

Per richiamare le API REST, è anche possibile utilizzare altri script come Jersey e RESTEasy per scrivere un client REST Java per Active IQ Unified Manager. Tenere presente le seguenti considerazioni relative al codice di esempio:

  • Utilizza una connessione HTTPS a Active IQ Unified Manager per richiamare l'URI REST specificato

  • Ignora il certificato fornito da Active IQ Unified Manager

  • Ignora la verifica del nome host durante l'handshake

  • Utilizzi javax.net.ssl.HttpsURLConnection Per una connessione URI

  • Utilizza una libreria di terze parti (org.apache.commons.codec.binary.Base64) Per la costruzione della stringa codificata Base64 utilizzata nell'autenticazione di base HTTP

Per compilare ed eseguire il codice di esempio, è necessario utilizzare il compilatore Java 1.8 o versione successiva.

import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.net.URL;
import java.security.SecureRandom;
import java.security.cert.X509Certificate;
import javax.net.ssl.HostnameVerifier;
import javax.net.ssl.HttpsURLConnection;
import javax.net.ssl.SSLContext;
import javax.net.ssl.SSLSession;
import javax.net.ssl.TrustManager;
import javax.net.ssl.X509TrustManager;
import org.apache.commons.codec.binary.Base64;

public class HelloApiServer {

	private static String server;
	private static String user;
	private static String password;
	private static String response_format = "json";
	private static String server_url;
	private static String port = null;

	/*
	 * * The main method which takes user inputs and performs the * necessary steps
	 * to invoke the REST URI and show the response
	 */ public static void main(String[] args) {
		if (args.length < 2 || args.length > 3) {
			printUsage();
			System.exit(1);
		}
		setUserArguments(args);
		String serverBaseUrl = "https://" + server;
		if (null != port) {
			serverBaseUrl = serverBaseUrl + ":" + port;
		}
		server_url = serverBaseUrl + "/api/datacenter/svm/svms";
		try {
			HttpsURLConnection connection = getAllTrustingHttpsUrlConnection();
			if (connection == null) {
				System.err.println("FATAL: Failed to create HTTPS connection to URL: " + server_url);
				System.exit(1);
			}
			System.out.println("Invoking API: " + server_url);
			connection.setRequestMethod("GET");
			connection.setRequestProperty("Accept", "application/" + response_format);
			String authString = getAuthorizationString();
			connection.setRequestProperty("Authorization", "Basic " + authString);
			if (connection.getResponseCode() != 200) {
				System.err.println("API Invocation Failed : HTTP error code : " + connection.getResponseCode() + " : "
						+ connection.getResponseMessage());
				System.exit(1);
			}
			BufferedReader br = new BufferedReader(new InputStreamReader((connection.getInputStream())));
			String response;
			System.out.println("Response:");
			while ((response = br.readLine()) != null) {
				System.out.println(response);
			}
			connection.disconnect();
		} catch (Exception e) {
			e.printStackTrace();
		}
	}

	/* Print the usage of this sample code */ private static void printUsage() {
		System.out.println("\nUsage:\n\tHelloApiServer <hostname> <user> <password>\n");
		System.out.println("\nExamples:\n\tHelloApiServer localhost admin mypassword");
		System.out.println("\tHelloApiServer 10.22.12.34:8320 admin password");
		System.out.println("\tHelloApiServer 10.22.12.34 admin password ");
		System.out.println("\tHelloApiServer 10.22.12.34:8212 admin password \n");
		System.out.println("\nNote:\n\t(1) When port number is not provided, 443 is chosen by default.");
	}

	/* * Set the server, port, username and password * based on user inputs. */ private static void setUserArguments(
			String[] args) {
		server = args[0];
		user = args[1];
		password = args[2];
		if (server.contains(":")) {
			String[] parts = server.split(":");
			server = parts[0];
			port = parts[1];
		}
	}

	/*
	 * * Create a trust manager which accepts all certificates and * use this trust
	 * manager to initialize the SSL Context. * Create a HttpsURLConnection for this
	 * SSL Context and skip * server hostname verification during SSL handshake. * *
	 * Note: Trusting all certificates or skipping hostname verification * is not
	 * required for API Services to work. These are done here to * keep this sample
	 * REST Client code as simple as possible.
	 */ private static HttpsURLConnection getAllTrustingHttpsUrlConnection()    {        HttpsURLConnection conn = null;        try {            /* Creating a trust manager that does not validate certificate chains */            TrustManager[] trustAllCertificatesManager = new                    TrustManager[]{new X509TrustManager(){
	 public X509Certificate[] getAcceptedIssuers(){return  null;}
	 public void checkClientTrusted(X509Certificate[]                                                       certs, String authType){}
	 public void checkServerTrusted(X509Certificate[]                                                       certs, String authType){}            }};            /* Initialize the SSLContext with the all-trusting trust manager */
	 SSLContext sslContext = SSLContext.getInstance("TLS");            sslContext.init(null, trustAllCertificatesManager, new                    SecureRandom());            HttpsURLConnection.setDefaultSSLSocketFactory(sslContext.getSocketFactory());            URL url = new URL(server_url);            conn = (HttpsURLConnection) url.openConnection();            /* Do not perform an actual hostname verification during SSL Handshake.            Let all hostname pass through as verified.*/            conn.setHostnameVerifier(new HostnameVerifier() {                public boolean verify(String host, SSLSession                        session) {                    return true;                }            });        } catch (Exception e) {            e.printStackTrace();        }        return conn;    }

	/*
	 * * This forms the Base64 encoded string using the username and password *
	 * provided by the user. This is required for HTTP Basic Authentication.
	 */ private static String getAuthorizationString() {
		String userPassword = user + ":" + password;
		byte[] authEncodedBytes = Base64.encodeBase64(userPassword.getBytes());
		String authString = new String(authEncodedBytes);
		return authString;
	}

}