loginservlet.java

OSGI_Opendoc, 基于OSGI框架Equinox的实战讲解

package org.riawork.demo.web.servlet;
/*
 * RIAWork.org
 * 
 * OSGI Opendoc Demo
 */
import java.io.IOException;

import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.osgi.service.http.HttpService;
import org.riawork.demo.service.user.Validator;
/**
 * desc: 登录响应Servlet
 *
 * @author jerry
 */
public class LoginServlet extends HttpServlet {

	private static final long serialVersionUID = 1L;
	
	private Validator validator=null;
	
	private HttpService http=null;
	
	public LoginServlet(){
		;
	}
	
	public void setValidator(Validator validator){
		this.validator=validator;
	}
	
	public void unsetValidator(Validator validator){
		if(this.validator!=validator)
			return;
		this.validator=null;
	}
	
	public void setHttpService(HttpService http){
		this.http=http;
		try {
			http.registerServlet("/demo/login", this, null, null);
			http.registerResources("/demo/page","page",null);
			System.out.println("已启动用户登录验证web模块，请通过/demo/page/login.htm访问");
		} 
		catch (Exception e) {
			e.printStackTrace();
		}
	}
	
	public void unsetHttpService(HttpService http){
		this.http.unregister("/demo/login");
		this.http.unregister("/demo/page");
		System.out.println("已卸载用户登录验证web模块！");
		this.http=null;
	}
	
	/** 
     * Web Post Method 
	 */
    public void doPost(HttpServletRequest request,  HttpServletResponse response)
		      throws IOException{
		doGet(request, response);
	}

	/** 
     * Web GET Method 
	 */
    public void doGet(HttpServletRequest request,  HttpServletResponse response)
        throws IOException{
    	String username=request.getParameter("username");
    	String userpass=request.getParameter("userpass");
    	response.setContentType("text/html");
    	ServletOutputStream output=response.getOutputStream();
    	if(validator==null){
    		output.println("No usable validator service");
    		output.close();
    		return;
    	}
    	boolean result=false;
    	try {
			result=validator.validate(username, userpass);
			if(result)
				output.println("Login success");
			else
				output.println("Login Fail,please check username and password");
			output.close();
			return;
		} 
    	catch (Exception e) {
			output.println("Login error:");
			output.println(e.toString());
			return;
		}
    }

}