kind.html <!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title></title> <style> .col-xs-5 { width: 41.66666667%; } .col-xs-7 { width: 58.33333333%; } </style> </head> <body> <form action="/kind/" method="post" > <div class="col-xs-7"> <input type="text" class="form-control" placeholder="请输入验证码" name="check_code"> </div> <div class="row"> <div class="col-xs-5"> <img src="/check_code.html"> </div> </div> <input type="submit" value="提交" /> </form> <script> function changeCheckCode(ths){ ths.src = ths.src + '?'; } </script>
views.py def kind(request): if request.method == 'POST': code = request.POST.get('check_code') if code.upper() == request.session['CheckCode'].upper(): #全部转为大写字母,使用户不用区分大小写,直接进行输入 print('验证码正确') else: print('验证码错误') return render(request, 'kind.html') from io import BytesIO from utils.check_code import create_validate_code #utils文件夹里的check_code文件 def check_code(request): """ 验证码 :param request: :return: """ # stream = BytesIO() # img, code = create_validate_code() # img.save(stream, 'PNG') # request.session['CheckCode'] = code # return HttpResponse(stream.getvalue()) # data = open('static/imgs/avatar/20130809170025.png','rb').read() # return HttpResponse(data) # 1. 创建一张图片 pip3 install Pillow # 2. 在图片中写入随机字符串 # obj = object() # 3. 将图片写入到制定文件 # 4. 打开制定目录文件,读取内容 # 5. HttpResponse(data) stream = BytesIO() img, code = create_validate_code() img.save(stream,'PNG') request.session['CheckCode'] = code return HttpResponse(stream.getvalue())
urls.py from django.urls import path from app_01 import views from django.conf.urls import url path('kind/', views.kind), url(r'^check_code.html$', views.check_code),
而关于动态验证码的生成,最主要的是check_code.py这个文件,这里面包含了很多动态验证码的各个部分组成(这个文件是必须使用的)
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 # 创建图形 img = Image.new(mode, size, bg_color) 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
又由于有字体的要求,所以还需导入Monaco.ttf文件
并且需要连接mysql数据库,在Terminal里敲入:
python manage.py makemigrations
python manage.py migrate
上述完成后,则可以看到动态的验证码了,示例如下
验证码输入正确时,后台会输出
验证码输入错误时,后台会输出
至此,关于动态验证码的生成已经完成。