package book.rssreader;

import java.io.OutputStream;
import javax.servlet.*;
import javax.servlet.http.*;

public class RssServlet extends HttpServlet {
	public void doPost(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, java.io.IOException {
		String url = request.getParameter("url");// 獲得請求的 url值
		long cache = 0;
		if (url != null && !url.equals("")) {//如果請求的地址不為空
			try {
				cache = Integer.parseInt(request.getParameter("cache")) * 60 * 100;//得到設置緩存的值，以分為單位，需轉化為毫秒
			} catch (Exception e) {
				cache = 0;
			}
			LoadRSS rss = new LoadRSS();//定義LoadRSS對象
			rss.setCacheTime(cache);//設置緩存的時間
			rss.setCacheDirName("cache");//設置存放的文件目錄
			response.setContentType("text/xml;chaset=utf-8");//設置響應信息為xml格式
			byte[] content = rss.getRSS(url).getBytes();
			OutputStream output = response.getOutputStream();
			output.write(content, 0, content.length);//輸出字符串，返回給客戶端
			output.flush();
		}
	}

	public void doGet(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, java.io.IOException {

		doPost(request, response);
	}

}