Java tutorial
/** * Copyright (c) 2000-present Liferay, Inc. All rights reserved. * * This library is free software; you can redistribute it and/or modify it under * the terms of the GNU Lesser General Public License as published by the Free * Software Foundation; either version 2.1 of the License, or (at your option) * any later version. * * This library is distributed in the hope that it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS * FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more * details. */ package com.liferay.portal.webdav; import com.liferay.petra.string.StringBundler; import com.liferay.petra.string.StringPool; import com.liferay.portal.kernel.log.Log; import com.liferay.portal.kernel.log.LogFactoryUtil; import com.liferay.portal.kernel.model.User; import com.liferay.portal.kernel.security.auth.PrincipalException; import com.liferay.portal.kernel.security.auth.PrincipalThreadLocal; import com.liferay.portal.kernel.security.permission.PermissionChecker; import com.liferay.portal.kernel.security.permission.PermissionCheckerFactoryUtil; import com.liferay.portal.kernel.security.permission.PermissionThreadLocal; import com.liferay.portal.kernel.service.UserLocalServiceUtil; import com.liferay.portal.kernel.servlet.HttpHeaders; import com.liferay.portal.kernel.util.ArrayUtil; import com.liferay.portal.kernel.util.GetterUtil; import com.liferay.portal.kernel.util.HttpUtil; import com.liferay.portal.kernel.util.InstancePool; import com.liferay.portal.kernel.util.PortalUtil; import com.liferay.portal.kernel.util.Validator; import com.liferay.portal.kernel.webdav.WebDAVException; import com.liferay.portal.kernel.webdav.WebDAVRequest; import com.liferay.portal.kernel.webdav.WebDAVStorage; import com.liferay.portal.kernel.webdav.WebDAVUtil; import com.liferay.portal.kernel.webdav.methods.Method; import com.liferay.portal.kernel.webdav.methods.MethodFactory; import com.liferay.portal.util.PropsValues; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; /** * @author Brian Wing Shun Chan * @author Alexander Chow * @author Fabio Pezzutto */ public class WebDAVServlet extends HttpServlet { @Override public void service(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse) { int status = HttpServletResponse.SC_PRECONDITION_FAILED; String userAgent = httpServletRequest.getHeader(HttpHeaders.USER_AGENT); if (_log.isDebugEnabled()) { _log.debug("User agent " + userAgent); } try { if (isIgnoredResource(httpServletRequest)) { status = HttpServletResponse.SC_NOT_FOUND; return; } WebDAVStorage storage = getStorage(httpServletRequest); if (storage == null) { if (_log.isDebugEnabled()) { _log.debug("Invalid WebDAV path " + httpServletRequest.getPathInfo()); } return; } // Set the path only if it has not already been set. This works if // and only if the servlet is not mapped to more than one URL. if (storage.getRootPath() == null) { storage.setRootPath(getRootPath(httpServletRequest)); } PermissionChecker permissionChecker = null; String remoteUser = httpServletRequest.getRemoteUser(); if (remoteUser != null) { PrincipalThreadLocal.setName(remoteUser); long userId = GetterUtil.getLong(remoteUser); User user = UserLocalServiceUtil.getUserById(userId); permissionChecker = PermissionCheckerFactoryUtil.create(user); PermissionThreadLocal.setPermissionChecker(permissionChecker); } // Get the method instance MethodFactory methodFactory = storage.getMethodFactory(); Method method = methodFactory.create(httpServletRequest); // Process the method try { WebDAVRequest webDAVRequest = new WebDAVRequestImpl(storage, httpServletRequest, httpServletResponse, userAgent, permissionChecker); status = method.process(webDAVRequest); } catch (WebDAVException wdave) { boolean logError = false; Throwable cause = wdave; while (cause != null) { if (cause instanceof PrincipalException) { logError = true; } cause = cause.getCause(); } if (logError) { _log.error(wdave, wdave); } else if (_log.isWarnEnabled()) { _log.warn(wdave, wdave); } status = HttpServletResponse.SC_PRECONDITION_FAILED; } } catch (Exception e) { _log.error(e, e); } finally { httpServletResponse.setStatus(status); if (_log.isInfoEnabled()) { String xLitmus = GetterUtil.getString(httpServletRequest.getHeader("X-Litmus")); if (Validator.isNotNull(xLitmus)) { xLitmus += " "; } _log.info(StringBundler.concat(xLitmus, httpServletRequest.getMethod(), " ", httpServletRequest.getRequestURI(), " ", status)); } } } protected String getRootPath(HttpServletRequest httpServletRequest) { String contextPath = HttpUtil.fixPath(PortalUtil.getPathContext(httpServletRequest), false, true); String servletPath = HttpUtil.fixPath(httpServletRequest.getServletPath(), false, true); return contextPath.concat(servletPath); } protected WebDAVStorage getStorage(HttpServletRequest httpServletRequest) { String pathInfo = WebDAVUtil.stripManualCheckInRequiredPath(httpServletRequest.getPathInfo()); pathInfo = WebDAVUtil.stripOfficeExtension(pathInfo); String[] pathArray = WebDAVUtil.getPathArray(pathInfo, true); WebDAVStorage storage = null; if (pathArray.length == 0) { storage = (WebDAVStorage) InstancePool.get(CompanyWebDAVStorageImpl.class.getName()); } else if (pathArray.length == 1) { storage = (WebDAVStorage) InstancePool.get(GroupWebDAVStorageImpl.class.getName()); } else if (pathArray.length >= 2) { storage = WebDAVUtil.getStorage(pathArray[1]); } return storage; } protected boolean isIgnoredResource(HttpServletRequest httpServletRequest) { String[] pathArray = WebDAVUtil.getPathArray(httpServletRequest.getPathInfo(), true); if (ArrayUtil.isEmpty(pathArray)) { return false; } for (String ignore : PropsValues.WEBDAV_IGNORE) { String[] ignoreArray = ignore.split(StringPool.SLASH); if (ignoreArray.length > pathArray.length) { continue; } boolean match = true; for (int i = 1; i <= ignoreArray.length; i++) { if (!pathArray[pathArray.length - i].equals(ignoreArray[ignoreArray.length - i])) { match = false; break; } } if (match) { if (_log.isDebugEnabled()) { _log.debug(StringBundler.concat("Skipping over ", httpServletRequest.getMethod(), " ", httpServletRequest.getPathInfo())); } return true; } } return false; } private static final Log _log = LogFactoryUtil.getLog(WebDAVServlet.class); }