entryservlet.java

检测手机浏览器是否支持PDF、javaScript、gif、jpeg、HTML、XHTML、ＷＭＬ、ＰＮＧ、ＣＳＳ等

package mobi.javabeans.browserDetector.webSiteAction.entry;

import java.io.IOException;

import javax.servlet.RequestDispatcher;
import javax.servlet.ServletConfig;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import mobi.javabeans.browserDetector.BrowserConstants;
import mobi.javabeans.browserDetector.DeviceConfig;
import mobi.javabeans.browserDetector.DeviceConfigDetector;
import mobi.javabeans.browserDetector.webSiteAction.MBD_Constants;

public class EntryServlet extends HttpServlet implements javax.servlet.Servlet {

	private static final long serialVersionUID = 95431318845711574L;

	private String web_entry_url = null;

	private String wml_entry_url = null;

	private String xmp_entry_url = null;

	public EntryServlet() {
		super();
	}

	public void init(ServletConfig config) throws ServletException {
		web_entry_url = config.getInitParameter("web_entry_url");
		wml_entry_url = config.getInitParameter("wml_entry_url");
		xmp_entry_url = config.getInitParameter("xmp_entry_url");
	}

	protected void doGet(HttpServletRequest request,
			HttpServletResponse response) throws ServletException, IOException {
		gotoEntry(request, response);
	}

	protected void doPost(HttpServletRequest request,
			HttpServletResponse response) throws ServletException, IOException {
		gotoEntry(request, response);
	}

	private void gotoEntry(HttpServletRequest request,
			HttpServletResponse response) throws ServletException, IOException {
		DeviceConfig deviceConfig = DeviceConfigDetector
				.detectCapabilities(request);
		if (deviceConfig == null) {
			deviceConfig = getDefaultMobileDeviceConfig();
		}
		request.getSession(true).setAttribute(
				MBD_Constants.SESSIONKEY_DEVICE_CONFIG, deviceConfig);
		RequestDispatcher dispacher = null;
		if (web_entry_url == null)
			throw new ServletException(
					"The mandatory web_entry_url is not Specified!");
		dispacher = request.getRequestDispatcher(web_entry_url);
		if (deviceConfig.isMobileBrowser()) {
			if (wml_entry_url == null && xmp_entry_url == null) {
				throw new ServletException("No mobile site URL is Specified!");
			}
			if ((wml_entry_url != null) && (deviceConfig.isSupported_WML())) {
				dispacher = request.getRequestDispatcher(web_entry_url);
			} else if ((xmp_entry_url != null)) {
				dispacher = request.getRequestDispatcher(xmp_entry_url);
			}
		}
		dispacher.forward(request, response);
	}

	private DeviceConfig getDefaultMobileDeviceConfig() {
		DeviceConfig mobileDeviceConfig = new DeviceConfig();
		String[] languages = { "en" };
		mobileDeviceConfig.setLanguages(languages);
		mobileDeviceConfig.setBrowser(BrowserConstants.BROWSER_UP);
		mobileDeviceConfig.setSupported_XHTMLMP(true);
		mobileDeviceConfig.setSupported_GIF(true);
		mobileDeviceConfig.setSupported_WBMP(false);
		mobileDeviceConfig.setSupported_XHTML(false);
		mobileDeviceConfig.setSupported_HTML(false);
		return mobileDeviceConfig;
	}

}