ActivationServlet.java

package hamaster.gradesign.servlet;

import hamaster.gradesign.client.Encoder;
import hamaster.gradesign.daemon.EJBClient;
import hamaster.gradesign.mail.IBEMailParameterGenerator;

import java.io.IOException;
import java.io.PrintWriter;

import javax.servlet.ServletConfig;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

/**
 * ActivationServlet
 */
@WebServlet("/active")
public class ActivationServlet extends HttpServlet {
	private static final long serialVersionUID = 1L;

	private IBEMailParameterGenerator mailParameterGenerator;
	private EJBClient client;

	/**
     * @see HttpServlet#HttpServlet()
     */
    public ActivationServlet() {
    }

    /*
	 * (non-Javadoc)
	 * @see javax.servlet.GenericServlet#init(javax.servlet.ServletConfig)
	 */
	public void init(ServletConfig config) throws ServletException {
		client = EJBClient.getInstance();
		mailParameterGenerator = (IBEMailParameterGenerator) client.getBean("mailParameterGenerator");
	}

	/*
	 * (non-Javadoc)
	 * @see javax.servlet.http.HttpServlet#doGet(javax.servlet.http.HttpServletRequest, javax.servlet.http.HttpServletResponse)
	 */
	protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		String ct = request.getParameter(IBEMailParameterGenerator.CONTENT_KEY);
		String sg = request.getParameter(IBEMailParameterGenerator.SIGNATURE_KEY);
		if (ct == null || sg == null)
			return;
		ct = ct.replace('*', '+');
		ct = ct.replace('-', '/');
		sg = sg.replace('*', '+');
		sg = sg.replace('-', '/');
		Encoder base64 = client.getEncoderByName("Base64");
		byte[] cont = base64.decode(ct);
		byte[] sign = base64.decode(sg);
		
		int ve = mailParameterGenerator.verify(cont, sign);
		PrintWriter out = response.getWriter();
		switch (ve) {
		case 0:
			out.print("激活成功");
			break;
		case 1:
			out.print("激活错误");
			break;
		case 2:
			out.print("未能在一周内激活");
			break;
		case 3:
			out.print("已经激活");
			break;
		default:
			out.print("未知错误");
		}
		out.flush();
		out.close();
	}
}