四种返回前端的方法

现在介绍第四种

import jsonimport randomfrom io import BytesIOfrom  PIL import Image, ImageDraw, ImageFontdef get_rgb_func():    """    获取三原色    :return: 三个元组    """    return (random.randint(1,255),random.randint(1,255),random.randint(1,255))def get_imge(request):    image = Image.new(mode="RGB", size=(130, 60), color=get_rgb_func())    draw = ImageDraw.Draw(image)    font = ImageFont.truetype("static/fonts/kumo.ttf",size=36)    f = BytesIO()    temp = []    for i in range(5):        random_char = random.choice([str(random.randint(0,9)),chr(random.randint(65,90)),chr(random.randint(97,122))])        draw.text((i*27,10),random_char,get_rgb_func(),font=font)        temp.append(random_char)    width = 120    height = 80    for i in range(80):        draw.point((random.randint(0,width),random.randint(0,height)),fill=get_rgb_func())    for i in range(10):        x1=random.randint(0,width)        x2=random.randint(0,width)        y1=random.randint(0,height)        y2=random.randint(0,height)        draw.line((x1,y1,x2,y2),fill=get_rgb_func())    for i in range(40):        draw.point([random.randint(0, width), random.randint(0, height)], fill=get_rgb_func())        x = random.randint(0, width)        y = random.randint(0, height)        draw.arc((x, y, x + 4, y + 4), 0, 90, fill=get_rgb_func())    image.save(f, "png")    data = f.getvalue()    request.session["random_char"] = ''.join(temp)    return HttpResponse(data)