python3 pillow生成验证码图片方法介绍

$ pip3 install pillow

\vericode.py

from PIL import Image,ImageDraw,ImageFont,ImageFilter

import random

 #随机码 默认长度=1

def random_code(lenght=1): 

  code = ''

  for char in range(lenght):

    code += chr(random.randint(65,90))

  return code

 #随机颜色 默认颜色范围【1，255】

def random_color(s=1,e=255):

  return (random.randint(s,e),random.randint(s,e),random.randint(s,e))

 #生成验证码图片

 #length 验证码长度

 #width 图片宽度

 #height 图片高度

 #返回验证码和图片

def veri_code(lenght=4,width=160,height=40):

  #创建Image对象

  image = Image.new('RGB',(width,height),(255,255,255))

  #创建Font对象

  font = ImageFont.truetype('Arial.ttf',32)

  #创建Draw对象

  draw = ImageDraw.Draw(image)

  #随机颜色填充每个像素

  for x in range(width):

    for y in range(height):

      draw.point((x,y),fill=random_color(64,255))

  #验证码

  code = random_code(lenght)

  #随机颜色验证码写到图片上

  for t in range(lenght):

    draw.text((40*t+5,5),code[t],font=font,fill=random_color(32,127))

  #模糊滤镜

  image = image.filter(ImageFilter.BLUR)

  return code,image

\views.py

from . import vericode.py

from io import BytesIO

from django.http import HttpResponse

def verify_code(request):

  f = BytesIO()

  code,image = vericode.veri_code()

  image.save(f,'jpeg')

  request.session['vericode'] = code

  return HttpResponse(f.getvalue())

def submit_xxx(request):

  if request.method == "POST":

    vericode = request.session.get("vericode").upper()

    submitcode = request.POST.get("vericode").upper()

    if submitcode == vericode:

      return HttpResponse('ok')

  return HttpResponse('error')