#_*_coding:utf-8_*_
from PIL import Image,ImageDraw,ImageFont,ImageFilter
import random
import math, string
#字体的位置，不同版本的系统会有不同
font_path = '/Library/Fonts/Arial.ttf'
#font_path = '/Library/Fonts/Hanzipen.ttc'
#生成几位数的验证码
number = 4
#生成验证码图片的高度和宽度
size = (100,30)
#背景颜色，默认为白色
bgcolor = (255,255,255)
#字体颜色，默认为蓝色
fontcolor = (0,0,255)
#干扰线颜色。默认为红色
linecolor = (255,0,0)
#是否要加入干扰线
draw_line = True
#加入干扰线条数的上下限
line_number = (1,5)

def gen_text():
  source = list(string.ascii_letters)
  for index in range(0,10):
    source.append(str(index))
  return ''.join(random.sample(source,number))#number是生成验证码的位数


#用来绘制干扰线
def gene_line(draw,width,height):
  begin = (random.randint(0, width), random.randint(0, height))
  end = (random.randint(0, width), random.randint(0, height))
  draw.line([begin, end], fill = linecolor)

def gene_code(save_path,filename):
  width,height = size #宽和高
  image = Image.new('RGBA',(width,height),bgcolor) #创建图片

  font = ImageFont.truetype(font_path,25) #验证码的字体和字体大小
  #font = ImageFont.truetype(25) #验证码的字体和字体大小
  draw = ImageDraw.Draw(image) #创建画笔
  #text = "我是中国人" #生成字符串
  text = gen_text() #生成字符串
  print(text)
  font_width, font_height = font.getsize(text)
  draw.text(((width - font_width) / number, (height - font_height) / number),text,    font= font,fill=fontcolor) #填充字符串

  if draw_line:
    gene_line(draw, width, height)
    gene_line(draw, width, height)
    gene_line(draw, width, height)
    gene_line(draw, width, height)

  image = image.transform((width + 20, height +10), Image.AFFINE, (1, -0.3, 0, -0.1, 1, 0), Image.BILINEAR) # 创建扭曲
  image = image.filter(ImageFilter.EDGE_ENHANCE_MORE) # 滤镜，边界加强
  image.save('%s/%s.png' %(save_path,filename)) # 保存验证码图片
  print("savepath:",save_path)
  return text

if __name__ == "__main__":
  gene_code('/tmp','test') #会把生成的图片存成/tmp/test.png

def acc_login(request):
  err_msg = {}
  today_str = datetime.date.today().strftime("%Y%m%d")
  verify_code_img_path = "%s/%s" %(settings.VERIFICATION_CODE_IMGS_DIR,
                   today_str)
  if not os.path.isdir(verify_code_img_path):
    os.makedirs(verify_code_img_path,exist_ok=True)
  print("session:",request.session.session_key)
  #print("session:",request.META.items())
  random_filename = "".join(random.sample(string.ascii_lowercase,4))
  random_code = verify_code.gene_code(verify_code_img_path,random_filename)
  cache.set(random_filename, random_code,30)

  if request.method == "POST":

    username = request.POST.get('username')
    password = request.POST.get('password')
    _verify_code = request.POST.get('verify_code')
    _verify_code_key = request.POST.get('verify_code_key')

    print("verify_code_key:",_verify_code_key)
    print("verify_code:",_verify_code)
    if cache.get(_verify_code_key) == _verify_code:
      print("code verification pass!")

      user = authenticate(username=username,password=password)
      if user is not None:
        login(request,user)
        request.session.set_expiry(60*60)
        return HttpResponseRedirect(request.GET.get("next") if request.GET.get("next") else "/")

      else:
        err_msg["error"] = 'Wrong username or password!'

    else:
      err_msg['error'] = "验证码错误!"

  return render(request,'login.html',{"filename":random_filename, "today_str":today_str, "error":err_msg})

{% extends 'base.html' %}
{% block body %}
  <div id="container" class="cls-container">
    <!-- BACKGROUND IMAGE -->
    <!--===================================================-->
    <div id="bg-overlay" class="bg-img img-balloon"></div>
   <!-- HEADER -->
    <!--===================================================-->
    <div class="cls-header cls-header-lg">
      <div class="cls-brand">
        <a class="box-inline" href="index.html" rel="external nofollow" >
          <!-- <img alt="Nifty Admin" src="/UploadFiles/2021-04-08/logo.png">

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持。