1 安裝 pillow 包，用於生成驗證碼圖片

程式碼檔案

verification.py

#!/usr/bin/python
# -*- coding: utf-8 -*-

import random
from PIL import Image, ImageDraw, ImageFont, ImageFilter


class VerificationCode:
    # 生成幾位數的驗證碼
    number = 4
    # 生成驗證碼圖片的寬高
    size = (102, 34)
    # 背景顏色，預設為白色
    bg_color = (255, 255, 255)
    # 字型顏色，預設為藍色
    font_color = (0, 0, 255)
    # 干擾線顏色。預設為紅色
    line_color = (255, 0, 0)
    # 干擾點顏色。預設為藍色
    point_color = (0, 0, 255)
    # 加入干擾線條數
    line_number = 3
    # 干擾點的個數
    point_number = 30

    # 用來隨機生成一個字串
    def gene_text(self):
        letters = "23456789abcdefghjkmnpqrstuvwxyzABCDEFGHJKLMNPQRSTUVWXYZ"  # 元字元
        return ''.join(random.sample(list(letters), self.number))  # 生成位數為number的驗證碼

    # 用來繪製干擾線
    def gene_line(self, draw, width, height):
        for i in range(self.line_number):
            begin = (random.randint(0, width), random.randint(0, height))
            end = (random.randint(0, width), random.randint(0, height))
            draw.line([begin, end], fill=self.line_color)

    # 增加干擾點
    def gene_point(self, draw, width, height):
        point_list = []
        for i in range(self.point_number):
            point = (random.randint(0, width), random.randint(0, height))
            point_list.append(point)
        draw.point(point_list, fill=self.point_color)

    # 生成驗證碼
    def gene_code(self):
        width, height = self.size  # 圖片寬高
        image = Image.new('RGBA', self.size, self.bg_color)  # 建立圖片
        font = ImageFont.truetype('arial', 25)  # 驗證碼的字型
        draw = ImageDraw.Draw(image)  # 建立畫筆
        text = self.gene_text()  # 生成字串
        font_width, font_height = font.getsize(text)  # 驗證碼佔寬高
        draw.text(((width - font_width) / self.number + 5, (height - font_height) / self.number), text,
                  font=font, fill=self.font_color)  # 填充字串
        self.gene_line(draw, width, height)  # 增加干擾線
        self.gene_point(draw, width, height)  # 增加干擾點
        image = image.filter(ImageFilter.EDGE_ENHANCE_MORE)  # 濾鏡，邊界加強
        # image.save('idencode.png')  # 儲存驗證碼圖片
        return text, image

# 呼叫一下試試
# VerificationCode().gene_code()
 

html

<img class="value" src="/index/verification_code/" onclick="ChangeCode(this);"/>

js

function ChangeCode(ths) {
    var src_re = $(ths).attr('src');
    $(ths).attr('src', src_re + '?');
}

urls 中配置

urlpatterns = [
    path('admin/', admin.site.urls),
    # ...
    url(r'^index/verification_code/$', views.verification_code),
]
 

views 中的使用

def verification_code(request):
    text, img = verification.VerificationCode().gene_code()
    # 存session 參考：http://www.cnblogs.com/liuye1990/p/9663474.html
    request.session['verification_code'] = text
    # img.show()  # 顯示一下效果
    stream = io.BytesIO()    # 建立一個io物件
    img.save(stream, "png")    # 將圖片物件im儲存到stream物件裡
    # stream.getvalue() 圖片二級制內容，再通過HttpResponse封裝，返回給前端頁面
    return HttpResponse(stream.getvalue())