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import base64
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import io
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import os
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import random
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from PIL import Image, ImageDraw, ImageFont
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class CaptchaService:
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"""
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验证码模块服务层
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"""
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@classmethod
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async def create_captcha_image_service(cls):
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# 创建空白图像
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image = Image.new('RGB', (160, 60), color='#EAEAEA')
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# 创建绘图对象
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draw = ImageDraw.Draw(image)
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# 设置字体
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font = ImageFont.truetype(os.path.join(os.path.abspath(os.getcwd()), 'assets', 'font', 'Arial.ttf'), size=30)
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# 生成两个0-9之间的随机整数
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num1 = random.randint(0, 9)
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num2 = random.randint(0, 9)
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# 从运算符列表中随机选择一个
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operational_character_list = ['+', '-', '*']
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operational_character = random.choice(operational_character_list)
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# 根据选择的运算符进行计算
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if operational_character == '+':
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result = num1 + num2
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elif operational_character == '-':
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result = num1 - num2
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else:
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result = num1 * num2
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# 绘制文本
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text = f'{num1} {operational_character} {num2} = ?'
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draw.text((25, 15), text, fill='blue', font=font)
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# 将图像数据保存到内存中
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buffer = io.BytesIO()
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image.save(buffer, format='PNG')
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# 将图像数据转换为base64字符串
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base64_string = base64.b64encode(buffer.getvalue()).decode()
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return [base64_string, result]
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