/*
* Copyright 2002-2012 the original author or authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.github.yingzhuo.mycar.controller;
import java.awt.Color;
import java.awt.Font;
import java.awt.Graphics;
import java.awt.image.BufferedImage;
import java.io.IOException;
import java.util.Random;
import javax.imageio.ImageIO;
import javax.servlet.http.HttpSession;
import org.apache.commons.io.IOUtils;
import org.apache.commons.io.output.ByteArrayOutputStream;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.http.HttpHeaders;
import org.springframework.http.HttpStatus;
import org.springframework.http.MediaType;
import org.springframework.http.ResponseEntity;
import org.springframework.web.bind.annotation.RequestMapping;
import com.github.yingzhuo.mycar.annotation.Comment;
//@Controller
@Deprecated
@Comment("参考为目的保留使用jcaptcha.jar")
public class CaptchaController {
public static final String CAPTCHA_SESSION_ATTR_NAME = CaptchaController.class.getName() + "#CAPTCHA_SESSION_ATTR_NAME";
private static final HttpHeaders HTTP_HEADERS;
private static final Random RANDOM;
static {
HTTP_HEADERS = new HttpHeaders();
HTTP_HEADERS.set("Pragma", "No-cache");
HTTP_HEADERS.set("Cache-Control", "No-cache");
HTTP_HEADERS.setDate("Expires", 0);
HTTP_HEADERS.setContentType(MediaType.IMAGE_JPEG);
RANDOM = new Random();
}
private int width;
private int height;
@RequestMapping(value = "/images/captcha.jpeg")
public ResponseEntity<byte[]> captcha(HttpSession session) throws IOException {
BufferedImage image = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
Graphics g = image.getGraphics();
g.setColor(getRandColor(200, 250));
g.fillRect(1, 1, width - 1, height - 1);
g.setColor(new Color(102, 102, 102));
g.drawRect(0, 0, width - 1, height - 1);
g.setFont(new Font("Times New Roman", Font.PLAIN, 17));
g.setColor(getRandColor(160, 200));
// 画随机线
for (int i = 0; i < 155; i++) {
int x = RANDOM.nextInt(width - 1);
int y = RANDOM.nextInt(height - 1);
int xl = RANDOM.nextInt(6) + 1;
int yl = RANDOM.nextInt(12) + 1;
g.drawLine(x, y, x + xl, y + yl);
}
// 从另一方向画随机线
for (int i = 0; i < 70; i++) {
int x = RANDOM.nextInt(width - 1);
int y = RANDOM.nextInt(height - 1);
int xl = RANDOM.nextInt(12) + 1;
int yl = RANDOM.nextInt(6) + 1;
g.drawLine(x, y, x - xl, y - yl);
}
// 生成随机数,并将随机数字转换为字母
String captchaStr = "";
for (int i = 0; i < 6; i++) {
int itmp = RANDOM.nextInt(26) + 65;
char ctmp = (char) itmp;
captchaStr += String.valueOf(ctmp);
g.setColor(new Color(20 + RANDOM.nextInt(110), 20 + RANDOM.nextInt(110), 20 + RANDOM.nextInt(110)));
g.drawString(String.valueOf(ctmp), 15 * i + 10, 16);
}
g.dispose();
session.setAttribute(CAPTCHA_SESSION_ATTR_NAME, captchaStr);
ByteArrayOutputStream out = new ByteArrayOutputStream();
ImageIO.write(image, "JPEG", out);
try {
return new ResponseEntity<byte[]>(out.toByteArray(), HTTP_HEADERS, HttpStatus.OK);
} finally {
IOUtils.closeQuietly(out);
}
}
private Color getRandColor(int fc, int bc) {
if (fc > 255)
fc = 255;
if (bc > 255)
bc = 255;
int r = fc + RANDOM.nextInt(bc - fc);
int g = fc + RANDOM.nextInt(bc - fc);
int b = fc + RANDOM.nextInt(bc - fc);
return new Color(r, g, b);
}
// access method
// ----------------------------------------------------------------------------------------------------------------------
@Value("100")
public void setWidth(int width) {
this.width = width;
}
@Value("18")
public void setHeight(int height) {
this.height = height;
}
}