107 lines
4.2 KiB
Java
107 lines
4.2 KiB
Java
package davmail.exchange;
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import davmail.Settings;
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import davmail.http.DavGatewayHttpClientFacade;
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import org.apache.commons.httpclient.HttpClient;
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import org.apache.commons.httpclient.HttpMethod;
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import org.apache.commons.httpclient.HttpStatus;
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import org.apache.commons.httpclient.methods.GetMethod;
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import java.io.IOException;
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import java.net.NetworkInterface;
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import java.net.SocketException;
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import java.net.UnknownHostException;
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import java.util.Enumeration;
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/**
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* Create ExchangeSession instances.
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*/
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public class ExchangeSessionFactory {
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/**
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* Create authenticated Exchange session
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*
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* @param userName user login
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* @param password user password
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* @return authenticated session
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* @throws java.io.IOException on error
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*/
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public static ExchangeSession getInstance(String userName, String password) throws IOException {
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try {
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ExchangeSession session = new ExchangeSession();
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session.login(userName, password);
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return session;
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} catch (IOException e) {
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if (checkNetwork()) {
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throw e;
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} else {
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throw new NetworkDownException("All network interfaces down !");
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}
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}
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}
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public static void checkConfig() throws IOException {
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String url = Settings.getProperty("davmail.url");
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HttpClient httpClient = DavGatewayHttpClientFacade.getInstance();
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HttpMethod testMethod = new GetMethod(url);
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try {
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// get webmail root url (will not follow redirects)
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testMethod.setFollowRedirects(false);
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testMethod.setDoAuthentication(false);
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int status = httpClient.executeMethod(testMethod);
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testMethod.releaseConnection();
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ExchangeSession.LOGGER.debug("Test configuration status: " + status);
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if (status != HttpStatus.SC_OK && status != HttpStatus.SC_UNAUTHORIZED
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&& status != HttpStatus.SC_MOVED_TEMPORARILY) {
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throw new IOException("Unable to connect to OWA at " + url + ", status code " +
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status + ", check configuration");
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}
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} catch (UnknownHostException exc) {
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String message = "DavMail configuration exception: \n";
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if (checkNetwork()) {
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message += "Unknown host " + exc.getMessage();
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ExchangeSession.LOGGER.error(message, exc);
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throw new IOException(message);
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} else {
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message += "All network interfaces down !";
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ExchangeSession.LOGGER.error(message, exc);
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throw new NetworkDownException(message);
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}
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} catch (NetworkDownException exc) {
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throw exc;
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} catch (Exception exc) {
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ExchangeSession.LOGGER.error("DavMail configuration exception: \n" + exc.getMessage(), exc);
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throw new IOException("DavMail configuration exception: \n" + exc.getMessage());
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} finally {
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testMethod.releaseConnection();
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}
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}
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/**
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* Check if at least one network interface is up and active (i.e. has an address)
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*
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* @return true if network available
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*/
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protected static boolean checkNetwork() {
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boolean up = false;
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Enumeration<NetworkInterface> enumeration;
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try {
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enumeration = NetworkInterface.getNetworkInterfaces();
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while (!up && enumeration.hasMoreElements()) {
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NetworkInterface networkInterface = enumeration.nextElement();
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up = networkInterface.isUp() && !networkInterface.isLoopback()
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&& networkInterface.getInetAddresses().hasMoreElements();
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}
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} catch (NoSuchMethodError error) {
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ExchangeSession.LOGGER.debug("Unable to test network interfaces (not available under Java 1.5)");
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up = true;
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} catch (SocketException exc) {
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ExchangeSession.LOGGER.error("DavMail configuration exception: \n Error listing network interfaces " + exc.getMessage(), exc);
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}
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return up;
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}
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}
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