608 lines
24 KiB
Java
608 lines
24 KiB
Java
/*
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* DavMail POP/IMAP/SMTP/CalDav/LDAP Exchange Gateway
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* Copyright (C) 2009 Mickael Guessant
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*/
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package davmail.http;
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import davmail.BundleMessage;
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import davmail.Settings;
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import davmail.exception.*;
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import davmail.ui.tray.DavGatewayTray;
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import davmail.util.StringUtil;
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import org.apache.commons.httpclient.*;
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import org.apache.commons.httpclient.URI;
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import org.apache.commons.httpclient.auth.AuthPolicy;
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import org.apache.commons.httpclient.auth.AuthScope;
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import org.apache.commons.httpclient.methods.DeleteMethod;
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import org.apache.commons.httpclient.methods.GetMethod;
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import org.apache.commons.httpclient.methods.StringRequestEntity;
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import org.apache.commons.httpclient.params.HttpClientParams;
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import org.apache.commons.httpclient.params.HttpMethodParams;
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import org.apache.jackrabbit.webdav.DavException;
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import org.apache.jackrabbit.webdav.MultiStatusResponse;
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import org.apache.jackrabbit.webdav.client.methods.DavMethodBase;
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import org.apache.jackrabbit.webdav.client.methods.PropFindMethod;
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import org.apache.jackrabbit.webdav.property.DavPropertyNameSet;
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import org.apache.log4j.Logger;
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import java.io.IOException;
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import java.net.*;
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import java.util.ArrayList;
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import java.util.Collection;
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import java.util.List;
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/**
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* Create HttpClient instance according to DavGateway Settings
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*/
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public final class DavGatewayHttpClientFacade {
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static final Logger LOGGER = Logger.getLogger("davmail.http.DavGatewayHttpClientFacade");
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static final String IE_USER_AGENT = "Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 6.1; Trident/4.0)";
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static final int MAX_REDIRECTS = 10;
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static final Object LOCK = new Object();
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private static MultiThreadedHttpConnectionManager multiThreadedHttpConnectionManager;
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private static boolean needNTLM;
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static final long ONE_MINUTE = 60000;
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private static Thread httpConnectionManagerThread;
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static {
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DavGatewayHttpClientFacade.start();
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// force XML response with Internet Explorer header
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System.getProperties().setProperty("httpclient.useragent", "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1; .NET CLR 1.1.4322)");
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}
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private DavGatewayHttpClientFacade() {
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}
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/**
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* Create a configured HttpClient instance.
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*
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* @param url target url
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* @return httpClient
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* @throws DavMailException on error
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*/
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public static HttpClient getInstance(String url) throws DavMailException {
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// create an HttpClient instance
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HttpClient httpClient = new HttpClient();
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httpClient.getParams().setParameter(HttpMethodParams.USER_AGENT, IE_USER_AGENT);
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httpClient.getParams().setParameter(HttpClientParams.MAX_REDIRECTS, MAX_REDIRECTS);
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configureClient(httpClient, url);
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return httpClient;
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}
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/**
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* Build an HttpClient instance for the provided url and credentials.
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*
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* @param url http(s) url
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* @param userName user name
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* @param password user password
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* @return HttpClient instance
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* @throws DavMailException on error
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*/
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public static HttpClient getInstance(String url, String userName, String password) throws DavMailException {
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HttpClient httpClient = new HttpClient();
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httpClient.getParams().setParameter(HttpMethodParams.USER_AGENT, IE_USER_AGENT);
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httpClient.getParams().setParameter(HttpClientParams.MAX_REDIRECTS, MAX_REDIRECTS);
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configureClient(httpClient, url);
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// some Exchange servers redirect to a different host for freebusy, use wide auth scope
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AuthScope authScope = new AuthScope(null, -1);
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httpClient.getState().setCredentials(authScope, new NTCredentials(userName, password, "", ""));
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return httpClient;
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}
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/**
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* Update http client configuration (proxy)
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*
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* @param httpClient current Http client
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* @param url target url
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* @throws DavMailException on error
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*/
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public static void configureClient(HttpClient httpClient, String url) throws DavMailException {
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try {
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HostConfiguration hostConfig = httpClient.getHostConfiguration();
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URI httpURI = new URI(url, true);
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hostConfig.setHost(httpURI);
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} catch (URIException e) {
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throw new DavMailException("LOG_INVALID_URL", url);
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}
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synchronized (LOCK) {
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httpClient.setHttpConnectionManager(multiThreadedHttpConnectionManager);
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}
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if (!needNTLM) {
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ArrayList<String> authPrefs = new ArrayList<String>();
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authPrefs.add(AuthPolicy.DIGEST);
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authPrefs.add(AuthPolicy.BASIC);
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// exclude NTLM authentication scheme
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httpClient.getParams().setParameter(AuthPolicy.AUTH_SCHEME_PRIORITY, authPrefs);
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}
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boolean enableProxy = Settings.getBooleanProperty("davmail.enableProxy");
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boolean useSystemProxies = Settings.getBooleanProperty("davmail.useSystemProxies");
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String proxyHost = null;
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int proxyPort = 0;
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String proxyUser = null;
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String proxyPassword = null;
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if (useSystemProxies) {
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// get proxy for url from system settings
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System.setProperty("java.net.useSystemProxies", "true");
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try {
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List<Proxy> proxyList = ProxySelector.getDefault().select(new java.net.URI(url));
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if (!proxyList.isEmpty() && proxyList.get(0).address() != null) {
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InetSocketAddress inetSocketAddress = (InetSocketAddress) proxyList.get(0).address();
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proxyHost = inetSocketAddress.getHostName();
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proxyPort = inetSocketAddress.getPort();
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// we may still need authentication credentials
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proxyUser = Settings.getProperty("davmail.proxyUser");
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proxyPassword = Settings.getProperty("davmail.proxyPassword");
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}
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} catch (URISyntaxException e) {
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throw new DavMailException("LOG_INVALID_URL", url);
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}
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} else if (enableProxy) {
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proxyHost = Settings.getProperty("davmail.proxyHost");
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proxyPort = Settings.getIntProperty("davmail.proxyPort");
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proxyUser = Settings.getProperty("davmail.proxyUser");
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proxyPassword = Settings.getProperty("davmail.proxyPassword");
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}
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// configure proxy
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if (proxyHost != null && proxyHost.length() > 0) {
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httpClient.getHostConfiguration().setProxy(proxyHost, proxyPort);
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if (proxyUser != null && proxyUser.length() > 0) {
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AuthScope authScope = new AuthScope(proxyHost, proxyPort, AuthScope.ANY_REALM);
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// detect ntlm authentication (windows domain name in user name)
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int backslashindex = proxyUser.indexOf('\\');
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if (backslashindex > 0) {
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httpClient.getState().setProxyCredentials(authScope,
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new NTCredentials(proxyUser.substring(backslashindex + 1),
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proxyPassword, "",
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proxyUser.substring(0, backslashindex)));
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} else {
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httpClient.getState().setProxyCredentials(authScope,
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new NTCredentials(proxyUser, proxyPassword, "", ""));
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}
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}
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}
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}
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/**
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* Get Http Status code for the given URL
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*
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* @param url url string
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* @return HttpStatus code
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* @throws IOException on error
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*/
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public static int getHttpStatus(String url) throws IOException {
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int status = 0;
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HttpClient httpClient = DavGatewayHttpClientFacade.getInstance(url);
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HttpMethod testMethod = new GetMethod(url);
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testMethod.setDoAuthentication(false);
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try {
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status = httpClient.executeMethod(testMethod);
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} finally {
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testMethod.releaseConnection();
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}
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return status;
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}
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/**
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* Check if status is a redirect (various 30x values).
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*
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* @param status Http status
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* @return true if status is a redirect
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*/
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public static boolean isRedirect(int status) {
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return status == HttpStatus.SC_MOVED_PERMANENTLY
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|| status == HttpStatus.SC_MOVED_TEMPORARILY
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|| status == HttpStatus.SC_SEE_OTHER
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|| status == HttpStatus.SC_TEMPORARY_REDIRECT;
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}
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/**
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* Execute given url, manually follow redirects.
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* Workaround for HttpClient bug (GET full URL over HTTPS and proxy)
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*
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* @param httpClient HttpClient instance
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* @param url url string
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* @return executed method
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* @throws IOException on error
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*/
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public static HttpMethod executeFollowRedirects(HttpClient httpClient, String url) throws IOException {
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HttpMethod method = new GetMethod(url);
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method.setFollowRedirects(false);
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return executeFollowRedirects(httpClient, method);
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}
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/**
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* Execute method with httpClient, follow 30x redirects.
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*
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* @param httpClient Http client instance
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* @param method Http method
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* @return last http method after redirects
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* @throws IOException on error
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*/
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public static HttpMethod executeFollowRedirects(HttpClient httpClient, HttpMethod method) throws IOException {
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HttpMethod currentMethod = method;
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try {
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DavGatewayTray.debug(new BundleMessage("LOG_EXECUTE_FOLLOW_REDIRECTS", currentMethod.getURI()));
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httpClient.executeMethod(currentMethod);
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Header location = currentMethod.getResponseHeader("Location");
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int redirectCount = 0;
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while (redirectCount++ < 10
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&& location != null
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&& isRedirect(currentMethod.getStatusCode())) {
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currentMethod.releaseConnection();
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currentMethod = new GetMethod(location.getValue());
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currentMethod.setFollowRedirects(false);
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DavGatewayTray.debug(new BundleMessage("LOG_EXECUTE_FOLLOW_REDIRECTS_COUNT", currentMethod.getURI(), redirectCount));
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httpClient.executeMethod(currentMethod);
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location = currentMethod.getResponseHeader("Location");
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}
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if (location != null && isRedirect(currentMethod.getStatusCode())) {
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currentMethod.releaseConnection();
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throw new HttpException("Maximum redirections reached");
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}
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} catch (IOException e) {
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currentMethod.releaseConnection();
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throw e;
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}
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// caller will need to release connection
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return currentMethod;
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}
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/**
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* Execute webdav search method.
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*
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* @param httpClient http client instance
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* @param path <i>encoded</i> searched folder path
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* @param searchRequest (SQL like) search request
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* @return Responses enumeration
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* @throws IOException on error
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*/
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public static MultiStatusResponse[] executeSearchMethod(HttpClient httpClient, String path, String searchRequest) throws IOException {
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String searchBody = "<?xml version=\"1.0\"?>\n" +
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"<d:searchrequest xmlns:d=\"DAV:\">\n" +
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" <d:sql>" + StringUtil.xmlEncode(searchRequest) + "</d:sql>\n" +
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"</d:searchrequest>";
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DavMethodBase searchMethod = new DavMethodBase(path) {
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@Override
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public String getName() {
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return "SEARCH";
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}
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@Override
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protected boolean isSuccess(int statusCode) {
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return statusCode == 207;
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}
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};
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searchMethod.setRequestEntity(new StringRequestEntity(searchBody, "text/xml", "UTF-8"));
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return executeMethod(httpClient, searchMethod);
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}
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/**
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* Execute webdav propfind method.
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*
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* @param httpClient http client instance
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* @param path <i>encoded</i> searched folder path
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* @param depth propfind request depth
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* @param properties propfind requested properties
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* @return Responses enumeration
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* @throws IOException on error
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*/
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public static MultiStatusResponse[] executePropFindMethod(HttpClient httpClient, String path, int depth, DavPropertyNameSet properties) throws IOException {
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PropFindMethod propFindMethod = new PropFindMethod(path, properties, depth);
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return executeMethod(httpClient, propFindMethod);
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}
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/**
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* Execute a delete method on the given path with httpClient.
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*
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* @param httpClient Http client instance
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* @param path Path to be deleted
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* @return Http status
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* @throws IOException on error
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*/
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public static int executeDeleteMethod(HttpClient httpClient, String path) throws IOException {
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DeleteMethod deleteMethod = new DeleteMethod(path);
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deleteMethod.setFollowRedirects(false);
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int status = executeHttpMethod(httpClient, deleteMethod);
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// do not throw error if already deleted
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if (status != HttpStatus.SC_OK && status != HttpStatus.SC_NOT_FOUND) {
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throw DavGatewayHttpClientFacade.buildHttpException(deleteMethod);
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}
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return HttpStatus.SC_OK;
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}
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/**
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* Execute webdav request.
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*
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* @param httpClient http client instance
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* @param method webdav method
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* @return Responses enumeration
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* @throws IOException on error
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*/
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public static MultiStatusResponse[] executeMethod(HttpClient httpClient, DavMethodBase method) throws IOException {
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MultiStatusResponse[] responses = null;
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try {
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int status = httpClient.executeMethod(method);
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// need to follow redirects (once) on public folders
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if (isRedirect(status)) {
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method.releaseConnection();
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URI targetUri = new URI(method.getResponseHeader("Location").getValue(), true);
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checkExpiredSession(targetUri.getQuery());
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method.setURI(targetUri);
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status = httpClient.executeMethod(method);
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}
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if (status != HttpStatus.SC_MULTI_STATUS) {
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throw buildHttpException(method);
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}
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responses = method.getResponseBodyAsMultiStatus().getResponses();
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} catch (DavException e) {
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throw new IOException(e.getMessage());
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} finally {
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method.releaseConnection();
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}
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return responses;
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}
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/**
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* Execute method with httpClient.
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*
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* @param httpClient Http client instance
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* @param method Http method
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* @return Http status
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* @throws IOException on error
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*/
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public static int executeHttpMethod(HttpClient httpClient, HttpMethod method) throws IOException {
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int status = 0;
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try {
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status = httpClient.executeMethod(method);
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} finally {
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method.releaseConnection();
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}
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return status;
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}
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/**
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* Test if NTLM auth scheme is enabled.
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*
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* @param httpClient HttpClient instance
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* @return true if NTLM is enabled
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*/
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public static boolean hasNTLM(HttpClient httpClient) {
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Object authPrefs = httpClient.getParams().getParameter(AuthPolicy.AUTH_SCHEME_PRIORITY);
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return authPrefs == null || (authPrefs instanceof List<?> && ((Collection) authPrefs).contains(AuthPolicy.NTLM));
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}
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/**
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* Enable NTLM authentication on http client
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* @param httpClient HttpClient instance
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*/
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public static void addNTLM(HttpClient httpClient) {
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// register the jcifs based NTLMv2 implementation
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AuthPolicy.registerAuthScheme(AuthPolicy.NTLM, NTLMv2Scheme.class);
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ArrayList<String> authPrefs = new ArrayList<String>();
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authPrefs.add(AuthPolicy.NTLM);
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authPrefs.add(AuthPolicy.DIGEST);
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authPrefs.add(AuthPolicy.BASIC);
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httpClient.getParams().setParameter(AuthPolicy.AUTH_SCHEME_PRIORITY, authPrefs);
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// make sure NTLM is always active
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needNTLM = true;
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}
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/**
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* Test method header for supported authentication mode,
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* return true if Basic authentication is not available
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*
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* @param getMethod http method
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* @return true if only NTLM is enabled
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*/
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public static boolean acceptsNTLMOnly(HttpMethod getMethod) {
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Header authenticateHeader = null;
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if (getMethod.getStatusCode() == HttpStatus.SC_UNAUTHORIZED) {
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authenticateHeader = getMethod.getResponseHeader("Authenticate");
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} else if (getMethod.getStatusCode() == HttpStatus.SC_PROXY_AUTHENTICATION_REQUIRED) {
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authenticateHeader = getMethod.getResponseHeader("Proxy-Authenticate");
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}
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if (authenticateHeader == null) {
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return false;
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} else {
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boolean acceptBasic = false;
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boolean acceptNTLM = false;
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HeaderElement[] headerElements = authenticateHeader.getElements();
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for (HeaderElement headerElement : headerElements) {
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if ("NTLM".equalsIgnoreCase(headerElement.getName())) {
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acceptNTLM = true;
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}
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if ("Basic".equalsIgnoreCase(headerElement.getName())) {
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acceptBasic = true;
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}
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}
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return acceptNTLM && !acceptBasic;
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}
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}
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/**
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* Execute test method from checkConfig, with proxy credentials, but without Exchange credentials.
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*
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* @param httpClient Http client instance
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* @param method Http method
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* @return Http status
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* @throws IOException on error
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*/
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public static int executeTestMethod(HttpClient httpClient, GetMethod method) throws IOException {
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// do not follow redirects in expired sessions
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method.setFollowRedirects(false);
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int status = httpClient.executeMethod(method);
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if (status == HttpStatus.SC_PROXY_AUTHENTICATION_REQUIRED
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&& acceptsNTLMOnly(method) && !hasNTLM(httpClient)) {
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method.releaseConnection();
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LOGGER.debug("Received " + status + " unauthorized at " + method.getURI() + ", retrying with NTLM");
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addNTLM(httpClient);
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status = httpClient.executeMethod(method);
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}
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return status;
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}
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/**
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* Execute Get method, do not follow redirects.
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*
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* @param httpClient Http client instance
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* @param method Http method
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* @param followRedirects Follow redirects flag
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* @return Http status
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* @throws IOException on error
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*/
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public static int executeGetMethod(HttpClient httpClient, GetMethod method, boolean followRedirects) throws IOException {
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// do not follow redirects in expired sessions
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method.setFollowRedirects(followRedirects);
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int status = httpClient.executeMethod(method);
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if ((status == HttpStatus.SC_UNAUTHORIZED || status == HttpStatus.SC_PROXY_AUTHENTICATION_REQUIRED)
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&& acceptsNTLMOnly(method) && !hasNTLM(httpClient)) {
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method.releaseConnection();
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LOGGER.debug("Received " + status + " unauthorized at " + method.getURI() + ", retrying with NTLM");
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addNTLM(httpClient);
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status = httpClient.executeMethod(method);
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}
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if (status != HttpStatus.SC_OK && (followRedirects || !isRedirect(status))) {
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LOGGER.warn("GET failed with status " + status + " at " + method.getURI() + ": " + method.getResponseBodyAsString());
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throw DavGatewayHttpClientFacade.buildHttpException(method);
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}
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// check for expired session
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if (followRedirects) {
|
|
String queryString = method.getQueryString();
|
|
checkExpiredSession(queryString);
|
|
if (queryString != null && queryString.contains("reason=2")) {
|
|
LOGGER.warn("GET failed, session expired at " + method.getURI() + ": " + method.getResponseBodyAsString());
|
|
throw DavGatewayHttpClientFacade.buildHttpException(method);
|
|
}
|
|
}
|
|
return status;
|
|
}
|
|
|
|
private static void checkExpiredSession(String queryString) throws DavMailAuthenticationException {
|
|
if (queryString != null && queryString.contains("reason=2")) {
|
|
LOGGER.warn("Request failed, session expired (reason=2) ");
|
|
throw new DavMailAuthenticationException("EXCEPTION_SESSION_EXPIRED");
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Build Http Exception from methode status
|
|
*
|
|
* @param method Http Method
|
|
* @return Http Exception
|
|
*/
|
|
public static HttpException buildHttpException(HttpMethod method) {
|
|
int status = method.getStatusCode();
|
|
// 440 means forbidden on Exchange
|
|
if (status == 440) {
|
|
status = HttpStatus.SC_FORBIDDEN;
|
|
}
|
|
StringBuilder message = new StringBuilder();
|
|
message.append(status).append(' ').append(method.getStatusText());
|
|
try {
|
|
message.append(" at ").append(method.getURI().getURI());
|
|
} catch (URIException e) {
|
|
message.append(method.getPath());
|
|
}
|
|
if (status == HttpStatus.SC_FORBIDDEN) {
|
|
return new HttpForbiddenException(message.toString());
|
|
} else if (status == HttpStatus.SC_NOT_FOUND) {
|
|
return new HttpNotFoundException(message.toString());
|
|
} else if (status == HttpStatus.SC_INTERNAL_SERVER_ERROR) {
|
|
return new HttpServerErrorException(message.toString());
|
|
} else {
|
|
return new HttpException(message.toString());
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Stop HttpConnectionManager.
|
|
*/
|
|
public static void stop() {
|
|
synchronized (LOCK) {
|
|
if (multiThreadedHttpConnectionManager != null) {
|
|
if (httpConnectionManagerThread != null) {
|
|
httpConnectionManagerThread.interrupt();
|
|
}
|
|
multiThreadedHttpConnectionManager.shutdown();
|
|
multiThreadedHttpConnectionManager = null;
|
|
}
|
|
}
|
|
}
|
|
|
|
static class HttpConnectionManagerThread extends Thread {
|
|
HttpConnectionManagerThread() {
|
|
super(HttpConnectionManager.class.getSimpleName());
|
|
setDaemon(true);
|
|
}
|
|
|
|
@Override
|
|
public void run() {
|
|
boolean terminated = false;
|
|
while (!terminated) {
|
|
try {
|
|
sleep(ONE_MINUTE);
|
|
} catch (InterruptedException e) {
|
|
terminated = true;
|
|
}
|
|
synchronized (LOCK) {
|
|
if (multiThreadedHttpConnectionManager != null) {
|
|
multiThreadedHttpConnectionManager.closeIdleConnections(ONE_MINUTE);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Create and start a new HttpConnectionManager, close idle connections every minute.
|
|
*/
|
|
public static void start() {
|
|
synchronized (LOCK) {
|
|
if (multiThreadedHttpConnectionManager == null) {
|
|
multiThreadedHttpConnectionManager = new MultiThreadedHttpConnectionManager();
|
|
multiThreadedHttpConnectionManager.getParams().setDefaultMaxConnectionsPerHost(100);
|
|
multiThreadedHttpConnectionManager.getParams().setConnectionTimeout(10000);
|
|
httpConnectionManagerThread = new HttpConnectionManagerThread();
|
|
httpConnectionManagerThread.start();
|
|
}
|
|
}
|
|
}
|
|
}
|