#!/usr/bin/env python # -*- coding:utf-8 -*- import tornado.ioloop import tornado.web import io import check_code container = {} class Session: def __init__(self,handler): self.handler = handler self.random_str = None def __set_random_str(self): import hashlib import time obj = hashlib.md5 ( ) obj.update ( bytes ( str ( time.time ( ) ), encoding='utf-8' ) ) random_str = obj.hexdigest () return random_str def __setitem__(self,key,value): if not self.random_str: random_str = self.handler.get_cookie('__kakaka__') if not random_str: random_str = self.__set_random_str() container[random_str] = {} else: if random_str in container.keys(): pass else: random_str = self.__set_random_str() container[random_str] = {} self.random_str = random_str container[self.random_str][key] = value self.handler.set_cookie("__kakaka__",self.random_str) def __getitem__(self,key): random_str = self.handler.get_cookie('__kakaka__') if not random_str: return None user_info_dict = container.get(random_str,None) if not user_info_dict: return None value = user_info_dict.get(key,None) return value class BaseHandler(tornado.web.RequestHandler): def initialize(self): self.session = Session(self) class LoginHandler(BaseHandler): def get(self, *args, **kwargs): self.render ( 'login.html', status='' ) def post(self, *args, **kwargs): user = self.get_argument('user',None) pwd = self.get_argument('pwd',None) code = self.get_argument('code',None) check_code = self.session["CheckCode"] if code.upper() == check_code.upper(): self.write("验证码正确") else: self.render('login.html',status = '验证码错误') class CheckCodeHandler(BaseHandler): def get(self): mstream = io.BytesIO() img, code = check_code.create_validate_code() img.save(mstream, "GIF") self.session["CheckCode"] = code print(mstream.getvalue()) self.write(mstream.getvalue()) class MainHandler(tornado.web.RequestHandler): def get(self): self.render('login.html',status='' ) settings = { 'template_path': 'template', 'static_path': 'static', 'static_url_prefix': '/static/', 'cookie_secret': 'aiuasdhflashjdfoiuashdfiuh', } application = tornado.web.Application([ (r"/index", MainHandler), (r"/login", LoginHandler), (r"/check_code", CheckCodeHandler), ], **settings) if __name__ == "__main__": application.listen(8888) tornado.ioloop.IOLoop.instance().start()
<!DOCTYPE html> <html> <head lang="en"> <meta charset="UTF-8"> <title></title> </head> <body> <h1>hello</h1> <form action="/login" method="post" enctype="multipart/form-data"> <p><input name="user" type="text" placeholder="用户名" /></p> <p><input name="pwd" type="password" placeholder="密码" /></p> <p> <input name='code' type="text" placeholder="验证码" /> <img src="/check_code" onclick='ChangeCode();' id='imgCode'> </p> <input type="submit" value="submit"/><span style="color: red">{{ status }}</span> </form> <script type="text/javascript"> function ChangeCode() { var code = document.getElementById('imgCode'); code.src += '?'; } </script> </body> </html>
#!/usr/bin/env python
#coding:utf-8
import random
from PIL import Image, ImageDraw, ImageFont, ImageFilter
_letter_cases = "abcdefghjkmnpqrstuvwxy" # 小写字母，去除可能干扰的i，l，o，z
_upper_cases = _letter_cases.upper() # 大写字母
_numbers = ''.join(map(str, range(3, 10))) # 数字
init_chars = ''.join((_letter_cases, _upper_cases, _numbers))
def create_validate_code(size=(120, 30),
chars=init_chars,
img_type="GIF",
mode="RGB",
bg_color=(255, 255, 255),
fg_color=(0, 0, 255),
font_size=18,
font_type="Monaco.ttf",
length=4,
draw_lines=True,
n_line=(1, 2),
draw_points=True,
point_chance = 2):
'''
@todo: 生成验证码图片
@param size: 图片的大小，格式（宽，高），默认为(120, 30)
@param chars: 允许的字符集合，格式字符串
@param img_type: 图片保存的格式，默认为GIF，可选的为GIF，JPEG，TIFF，PNG
@param mode: 图片模式，默认为RGB
@param bg_color: 背景颜色，默认为白色
@param fg_color: 前景色，验证码字符颜色，默认为蓝色#0000FF
@param font_size: 验证码字体大小
@param font_type: 验证码字体，默认为 ae_AlArabiya.ttf
@param length: 验证码字符个数
@param draw_lines: 是否划干扰线
@param n_lines: 干扰线的条数范围，格式元组，默认为(1, 2)，只有draw_lines为True时有效
@param draw_points: 是否画干扰点
@param point_chance: 干扰点出现的概率，大小范围[0, 100]
@return: [0]: PIL Image实例
@return: [1]: 验证码图片中的字符串
'''
width, height = size # 宽， 高
img = Image.new(mode, size, bg_color) # 创建图形
draw = ImageDraw.Draw(img) # 创建画笔
def get_chars():
'''生成给定长度的字符串，返回列表格式'''
return random.sample(chars, length)
def create_lines():
'''绘制干扰线'''
line_num = random.randint(*n_line) # 干扰线条数
for i in range(line_num):
# 起始点
begin = (random.randint(0, size[0]), random.randint(0, size[1]))
#结束点
end = (random.randint(0, size[0]), random.randint(0, size[1]))
draw.line([begin, end], fill=(0, 0, 0))
def create_points():
'''绘制干扰点'''
chance = min(100, max(0, int(point_chance))) # 大小限制在[0, 100]
for w in range(width):
for h in range(height):
tmp = random.randint(0, 100)
if tmp > 100 - chance:
draw.point((w, h), fill=(0, 0, 0))
def create_strs():
'''绘制验证码字符'''
c_chars = get_chars()
strs = ' %s ' % ' '.join(c_chars) # 每个字符前后以空格隔开
font = ImageFont.truetype(font_type, font_size)
font_width, font_height = font.getsize(strs)
draw.text(((width - font_width) / 3, (height - font_height) / 3),
strs, font=font, fill=fg_color)
return ''.join(c_chars)
if draw_lines:
create_lines()
if draw_points:
create_points()
strs = create_strs()
# 图形扭曲参数
params = [1 - float(random.randint(1, 2)) / 100,
0,
0,
0,
1 - float(random.randint(1, 10)) / 100,
float(random.randint(1, 2)) / 500,
0.001,
float(random.randint(1, 2)) / 500
]
img = img.transform(size, Image.PERSPECTIVE, params) # 创建扭曲
img = img.filter(ImageFilter.EDGE_ENHANCE_MORE) # 滤镜，边界加强（阈值更大）
return img, strs