视图接口开发-绘制完整图片验证码

视图接口开发-绘制完整图片验证码

import random
from PIL import Image, ImageDraw, ImageFont
from io import BytesIO


def code_img(request):
    # 需要一张背景图
    # (189, 244, 9)  0-255    red green    #000fff
    width = 159
    height = 33
    bgcolor = (random.randrange(20, 200), random.randrange(20, 200), random.randrange(20, 200))
    im = Image.new('RGB', (width, height), color=bgcolor)

    # 需要一些噪点500
    draw = ImageDraw.Draw(im)  # 创建一个画笔对象
    for i in range(0, 500):
        xy = (random.randrange(0, width), random.randrange(0, height))
        fill = (random.randrange(0, 255), random.randrange(0, 255), random.randrange(0, 255))
        draw.point(xy, fill=fill)

    # 需要4个数字
    str1 = '0123456789'
    rand_str = ''
    for i in range(0, 4):
        rand_str += str1[random.randrange(0, len(str1))]
    font = ImageFont.truetype('static/font/angsab.ttf', 23)

    fill = (random.randrange(0, 255), random.randrange(0, 255), random.randrange(0, 255))
    draw.text((5, 2), rand_str[0], font=font, fill=fill)
    draw.text((23, 5), rand_str[1], font=font, fill=fill)
    draw.text((59, 1), rand_str[2], font=font, fill=fill)
    draw.text((92, 5), rand_str[3], font=font, fill=fill)

    del draw
    request.session['code'] = rand_str
    buf = BytesIO()
    im.save(buf, 'png')
    return HttpResponse(buf.getvalue())