Django之路 - 实现登录随机验证码

#_*_coding:utf-8_*_ from PIL import Image,ImageDraw,ImageFont,ImageFilter import random
import math, string #字体的位置，不同版本的系统会有不同
font_path = '/Library/Fonts/Arial.ttf'
#font_path = '/Library/Fonts/Hanzipen.ttc'
#生成几位数的验证码
number = 4
#生成验证码图片的高度和宽度
size = (100,30)
#背景颜色，默认为白色
bgcolor = (255,255,255)
#字体颜色，默认为蓝色
fontcolor = (0,0,255)
#干扰线颜色。默认为红色
linecolor = (255,0,0)
#是否要加入干扰线
draw_line = True
#加入干扰线条数的上下限
line_number = (1,5) def gen_text():
source = list(string.ascii_letters)
for index in range(0,10):
source.append(str(index))
return ''.join(random.sample(source,number))#number是生成验证码的位数 #用来绘制干扰线
def gene_line(draw,width,height):
begin = (random.randint(0, width), random.randint(0, height))
end = (random.randint(0, width), random.randint(0, height))
draw.line([begin, end], fill = linecolor) def gene_code(save_path,filename):
width,height = size #宽和高
image = Image.new('RGBA',(width,height),bgcolor) #创建图片 font = ImageFont.truetype(font_path,25) #验证码的字体和字体大小
#font = ImageFont.truetype(25) #验证码的字体和字体大小
draw = ImageDraw.Draw(image) #创建画笔
#text = "我是中国人" #生成字符串
text = gen_text() #生成字符串
print(text)
font_width, font_height = font.getsize(text)
draw.text(((width - font_width) / number, (height - font_height) / number),text,\
font= font,fill=fontcolor) #填充字符串 if draw_line:
gene_line(draw, width, height)
gene_line(draw, width, height)
gene_line(draw, width, height)
gene_line(draw, width, height) image = image.transform((width + 20, height +10), Image.AFFINE, (1, -0.3, 0, -0.1, 1, 0), Image.BILINEAR) # 创建扭曲
image = image.filter(ImageFilter.EDGE_ENHANCE_MORE) # 滤镜，边界加强
image.save('%s/%s.png' %(save_path,filename)) # 保存验证码图片
print("savepath:",save_path)
return text if __name__ == "__main__":
gene_code('/tmp','test') #会把生成的图片存成/tmp/test.png

def acc_login(request):
err_msg = {}
today_str = datetime.date.today().strftime("%Y%m%d")
verify_code_img_path = "%s/%s" %(settings.VERIFICATION_CODE_IMGS_DIR,
today_str)
if not os.path.isdir(verify_code_img_path):
os.makedirs(verify_code_img_path,exist_ok=True)
print("session:",request.session.session_key)
#print("session:",request.META.items())
random_filename = "".join(random.sample(string.ascii_lowercase,4))
random_code = verify_code.gene_code(verify_code_img_path,random_filename)
cache.set(random_filename, random_code,30) if request.method == "POST": username = request.POST.get('username')
password = request.POST.get('password')
_verify_code = request.POST.get('verify_code')
_verify_code_key = request.POST.get('verify_code_key') print("verify_code_key:",_verify_code_key)
print("verify_code:",_verify_code)
if cache.get(_verify_code_key) == _verify_code:
print("code verification pass!") user = authenticate(username=username,password=password)
if user is not None:
login(request,user)
request.session.set_expiry(60*60)
return HttpResponseRedirect(request.GET.get("next") if request.GET.get("next") else "/") else:
err_msg["error"] = 'Wrong username or password!' else:
err_msg['error'] = "验证码错误!" return render(request,'login.html',{"filename":random_filename, "today_str":today_str, "error":err_msg})