/* ------------------------------------
    * © Kaamelot - 2006
    * ------------------------------------
    * Projet  : KaamelotAddOn
    * Fichier : DWRServlet.java
    * Description : 
    * Overrided DWRServlet offering a configuration InputStream issued from a File served by PluginResourceDownload     
    */
   package com.atlassian.jira.servlet;
  
  import java.io.BufferedReader;
  import java.io.ByteArrayInputStream;
  import java.io.IOException;
  import java.io.InputStream;
  import java.io.OutputStream;
  import java.io.UnsupportedEncodingException;
  import java.security.Principal;
  import java.util.Enumeration;
  import java.util.Locale;
  import java.util.Map;
  
  import javax.servlet.RequestDispatcher;
  import javax.servlet.ServletConfig;
  import javax.servlet.ServletException;
  import javax.servlet.ServletInputStream;
  import javax.servlet.http.Cookie;
  import javax.servlet.http.HttpServletRequest;
  import javax.servlet.http.HttpServletResponse;
  import javax.servlet.http.HttpSession;
  
  import uk.ltd.getahead.dwr.Configuration;
  import uk.ltd.getahead.dwr.Messages;
  import uk.ltd.getahead.dwr.util.Logger;
  
  import com.atlassian.jira.ComponentManager;
  import com.atlassian.jira.web.servlet.FileServerServlet;
  import com.atlassian.plugin.PluginAccessor;
  import com.atlassian.plugin.PluginManager;
  import com.atlassian.plugin.servlet.PluginResourceDownload;
  
  public class DWRServlet extends uk.ltd.getahead.dwr.DWRServlet {
  	
  	protected String urlPivot = "";
  	
  	protected String getPivotParameterKey() {
  		return "urlPivot";
  	}
  
  	public void configure(ServletConfig config, Configuration configuration) throws ServletException {
  		super.configure(config, configuration);
  		urlPivot = config.getInitParameter(getPivotParameterKey());
  	}
  
  	protected String getUrlPivot() {
  		return urlPivot;
  	}
  
  	protected void setUrlPivot(String urlPivot) {
  		this.urlPivot = urlPivot;
  	}
  	
  //	public Container getContainer(ServletConfig config) throws ServletException {
  //		Container container = super.getContainer(config);
  //		DefaultInterfaceProcessor processor = null;
  //		Object bean = container.getBean("interface");
  //		if (bean instanceof DefaultInterfaceProcessor) {
  //			// processor = (DefaultInterfaceProcessor)bean;
  //			// HttpServletRequest req = WebContextFactory.get().getHttpServletRequest();
  //			// String overridingPath = req.getContextPath() + "/plugins/servlet/" + config.getInitParameter("url-pattern");
  //			// processor.setOverridePath(overridePath);
  //		}
  //		return container;
  //	}
  
  	/** */
  	private static final long serialVersionUID = 1L;
  
  	private static final Logger log = Logger.getLogger(DWRServlet.class);
  
  //	protected PluginManager pluginManager = ComponentManager.getInstance().getPluginManager();
  	protected PluginAccessor pluginAccessor = (PluginAccessor)ComponentManager.getInstance().getComponentInstanceOfType(PluginAccessor.class);
  
  	protected HttpServletRequest getWrappedRequest(HttpServletRequest req) {
  		return new EvilHttpRequest(req, getUrlPivot());
  	}
  
  	protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws IOException, ServletException {
  		super.doGet(getWrappedRequest(req), resp);
  	}
  
  	protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws IOException, ServletException {
  		super.doPost(getWrappedRequest(req), resp);
  	}
  
  	/**
  	 * @Override
  	 */
  	protected void readFile(String configFile, Configuration configuration) throws ServletException {
  		try {
 			InputStream in = getConfigInputStream(configFile);
 			if (in == null) {
 				log.error("Missing config file: " + configFile); //$NON-NLS-1$
 			} else {
 				configuration.addConfig(in);
 			}
 		} catch (Exception ex) {
 			throw new ServletException(Messages.getString("DWRServlet.ConfigError", configFile), ex); //$NON-NLS-1$
 		}
 	}
 
 	protected InputStream getConfigInputStream(String _configFile) throws IOException {
 		// Implementing the DownloadStrategy Class
 		FileServerServlet s = new FileServerServlet();
 		MockResponse mockResponse = new MockResponse();
 		CharResponseWrapper charResponseWrapper = new CharResponseWrapper(mockResponse);
 		PluginResourceDownload downloadStrategy = new PluginResourceDownload(pluginAccessor);
 
 		// An MockRequest is build just to provide the correct URI , the downloadable ressource [_path]
 		MockRequest mockRequest = new MockRequest();
 		mockRequest.setRequestURI(_configFile);
 
 		// Retrieve Downloadable file ...
 		downloadStrategy.serveFile(s, mockRequest, charResponseWrapper);
 		OutputStream out = charResponseWrapper.getOutputStream();
 
 		return new ByteArrayInputStream(out.toString().getBytes());
 	}
 
 	// Mock HttpServletResponse Class to provide RequestURI
 	class MockResponse extends EmptyResponse implements HttpServletResponse {
 
 	}
 
 	// Mock HttpServletRequest Class to provide RequestURI
 	class MockRequest extends EmptyRequest implements HttpServletRequest {
 		String requestURI;
 
 		public String getRequestURI() {
 			return requestURI;
 		}
 
 		public void setRequestURI(String _requestURI) {
 			requestURI = _requestURI;
 		}
 	}
 
 	public static class EvilHttpRequest implements HttpServletRequest {
 		private HttpServletRequest wrappedRequest;
 		private String pathInfo;
 		private String servletPath;
 		private String urlPivot;
 
 		public EvilHttpRequest(HttpServletRequest wrappedRequest, String _urlPivot) {
 			this.wrappedRequest = wrappedRequest;
 			this.servletPath = wrappedRequest.getServletPath();
 			this.pathInfo = wrappedRequest.getPathInfo();
 			this.urlPivot = _urlPivot;
 			String fullPath = servletPath + pathInfo; 
 			int split = fullPath.indexOf(urlPivot) + urlPivot.length() - 1;
 			this.servletPath = fullPath.substring(0, split );
 			this.pathInfo = fullPath.substring(split);
 		}
 
 		public String getPathInfo() {
 			return pathInfo;
 		}
 
 		public String getServletPath() {
 			return servletPath;
 		}
 
 		public String getAuthType() {
 			return wrappedRequest.getAuthType();
 		}
 
 		public Cookie[] getCookies() {
 			return wrappedRequest.getCookies();
 		}
 
 		public long getDateHeader(String s) {
 			return wrappedRequest.getDateHeader(s);
 		}
 
 		public String getHeader(String s) {
 			return wrappedRequest.getHeader(s);
 		}
 
 		public Enumeration getHeaders(String s) {
 			return wrappedRequest.getHeaders(s);
 		}
 
 		public Enumeration getHeaderNames() {
 			return wrappedRequest.getHeaderNames();
 		}
 
 		public int getIntHeader(String s) {
 			return wrappedRequest.getIntHeader(s);
 		}
 
 		public String getMethod() {
 			return wrappedRequest.getMethod();
 		}
 
 		public String getPathTranslated() {
 			return wrappedRequest.getPathTranslated();
 		}
 
 		public String getContextPath() {
 			return wrappedRequest.getContextPath();
 		}
 
 		public String getQueryString() {
 			return wrappedRequest.getQueryString();
 		}
 
 		public String getRemoteUser() {
 			return wrappedRequest.getRemoteUser();
 		}
 
 		public boolean isUserInRole(String s) {
 			return wrappedRequest.isUserInRole(s);
 		}
 
 		public Principal getUserPrincipal() {
 			return wrappedRequest.getUserPrincipal();
 		}
 
 		public String getRequestedSessionId() {
 			return wrappedRequest.getRequestedSessionId();
 		}
 
 		public String getRequestURI() {
 			return wrappedRequest.getRequestURI();
 		}
 
 		public StringBuffer getRequestURL() {
 			return wrappedRequest.getRequestURL();
 		}
 
 		public HttpSession getSession(boolean b) {
 			return wrappedRequest.getSession(b);
 		}
 
 		public HttpSession getSession() {
 			return wrappedRequest.getSession();
 		}
 
 		public boolean isRequestedSessionIdValid() {
 			return wrappedRequest.isRequestedSessionIdValid();
 		}
 
 		public boolean isRequestedSessionIdFromCookie() {
 			return wrappedRequest.isRequestedSessionIdFromCookie();
 		}
 
 		public boolean isRequestedSessionIdFromURL() {
 			return wrappedRequest.isRequestedSessionIdFromURL();
 		}
 
 		/**
 		 * @deprecated
 		 */
 		public boolean isRequestedSessionIdFromUrl() {
 			return wrappedRequest.isRequestedSessionIdFromUrl();
 		}
 
 		public Object getAttribute(String s) {
 			return wrappedRequest.getAttribute(s);
 		}
 
 		public Enumeration getAttributeNames() {
 			return wrappedRequest.getAttributeNames();
 		}
 
 		public String getCharacterEncoding() {
 			return wrappedRequest.getCharacterEncoding();
 		}
 
 		public void setCharacterEncoding(String s) throws UnsupportedEncodingException {
 			wrappedRequest.setCharacterEncoding(s);
 		}
 
 		public int getContentLength() {
 			return wrappedRequest.getContentLength();
 		}
 
 		public String getContentType() {
 			return wrappedRequest.getContentType();
 		}
 
 		public ServletInputStream getInputStream() throws IOException {
 			return wrappedRequest.getInputStream();
 		}
 
 		public String getParameter(String s) {
 			return wrappedRequest.getParameter(s);
 		}
 
 		public Enumeration getParameterNames() {
 			return wrappedRequest.getParameterNames();
 		}
 
 		public String[] getParameterValues(String s) {
 			return wrappedRequest.getParameterValues(s);
 		}
 
 		public Map getParameterMap() {
 			return wrappedRequest.getParameterMap();
 		}
 
 		public String getProtocol() {
 			return wrappedRequest.getProtocol();
 		}
 
 		public String getScheme() {
 			return wrappedRequest.getScheme();
 		}
 
 		public String getServerName() {
 			return wrappedRequest.getServerName();
 		}
 
 		public int getServerPort() {
 			return wrappedRequest.getServerPort();
 		}
 
 		public BufferedReader getReader() throws IOException {
 			return wrappedRequest.getReader();
 		}
 
 		public String getRemoteAddr() {
 			return wrappedRequest.getRemoteAddr();
 		}
 
 		public String getRemoteHost() {
 			return wrappedRequest.getRemoteHost();
 		}
 
 		public void setAttribute(String s, Object o) {
 			wrappedRequest.setAttribute(s, o);
 		}
 
 		public void removeAttribute(String s) {
 			wrappedRequest.removeAttribute(s);
 		}
 
 		public Locale getLocale() {
 			return wrappedRequest.getLocale();
 		}
 
 		public Enumeration getLocales() {
 			return wrappedRequest.getLocales();
 		}
 
 		public boolean isSecure() {
 			return wrappedRequest.isSecure();
 		}
 
 		public RequestDispatcher getRequestDispatcher(String s) {
 			return wrappedRequest.getRequestDispatcher(s);
 		}
 
 		/**
 		 * @deprecated
 		 */
 		public String getRealPath(String s) {
 			return wrappedRequest.getRealPath(s);
 		}
 	}
 
 }