package com.yeshi.buwan.controller.admin.validate;

import java.io.IOException;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;

import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;

import com.yeshi.buwan.util.Constant;
import com.yeshi.buwan.util.VerifyCodeUtil;

@Controller
@RequestMapping("admin/new/api/validate")
public class ValidateController {

	@RequestMapping(value = "/imgcode", method = RequestMethod.GET)
	public void imgCode(HttpServletRequest request, HttpServletResponse response) {
		response.setHeader("Pragma", "No-cache");
		response.setHeader("Cache-Control", "no-cache");
		response.setDateHeader("Expires", 0);
		response.setContentType("image/jpeg");

		// 生成随机字串
		String verifyCode = VerifyCodeUtil.generateVerifyCode(4);
		// 存入会话session
		HttpSession session = request.getSession(true);
		session.setAttribute(Constant.RANDKEY, verifyCode.toLowerCase());
		// 生成图片
		int w = 200, h = 80;
		try {
			VerifyCodeUtil.outputImage(w, h, response.getOutputStream(), verifyCode);
		} catch (IOException e) {
			e.printStackTrace();
		}
	}

}