#生成随机验证码

from PIL importImagefrom io importBytesIOfrom PIL importImageDraw,ImageFontdefcheck_code(request):##Django imag标签src属性导入图片的原理

#f=open('static/imgs/1.jpg','rb') #注意：static/imgs/1.jpg不能写成 /static/imgs/1.jpg

#data=f.read()

#f.close()

#return HttpResponse(data)

#创建code.png写入到本地BBS目录下

#from PIL import Image

#img=Image.new(mode='RGB',size=(120,30),color=(255,255,255)) #默认写入白板，随后在白板上写入字符串等

#f=open('code.png','wb')

#img.save(f,'png') #png为图片后缀

#f.close()

##将本地图片code.png读取到内存并使网页图片能显示出来

#f=open('code.png','rb')

#data=f.read()

#f.close()

#return HttpResponse(data)

#以上操作比较麻烦，需要写入本地又读取到内存中

#以下操作为在内存中开辟空间，在内存中进行读写等操作

#from io import BytesIO

##写入内存中

#f=BytesIO()

#img=Image.new(mode='RGB',size=(120,30),color=(255,255,255))

#img.save(f,'png')

##从内存中读出来

#data=f.getvalue()

#return HttpResponse(data)

#from io import BytesIO

#from PIL import ImageDraw,ImageFont

f=BytesIO()

img=Image.new(mode='RGB',size=(120,30),color=(255,255,255))

draw=ImageDraw.Draw(img,mode='RGB')#draw.point([100, 25], fill="red")

#draw.point([30, 20], fill=(187, 255, 255))

#draw.line((10, 10, 20, 30), fill='red')

#draw.line((100, 10, 30, 20), fill=(180, 255, 255))

#draw.arc((30, 25, 80, 10), 0, 360, fill="red")

#font = ImageFont.truetype("kumo.ttf", 28)

#draw.text([0, 0], 'python', "red",font=font)

importrandom#char_list=[]

#for i in range(5):

#char=chr(random.randint(65,109))

#char_list.append(char)

#''.join(char_list)

##列表生成式,但是字母随机了，字体颜色不随机，所以不用列表生成式

#v=''.join([ chr(random.randint(65,109)) for i in range(5)])

#for i in range(5):

#char=chr(random.randint(65,109))

#font=ImageFont.truetype("kumo.ttf", 28)

#draw.text([i*24,0],char,(random.randint(0,255),random.randint(0,255),random.randint(0,255)),font=font)

#写入的字符串需要自己知道内容，方便表单的校验

#char_list = []

#for i in range(5):

#char=chr(random.randint(65,109))

#char_list.append(char)

#font=ImageFont.truetype("kumo.ttf", 28)

#draw.text([i*24,0],char,(random.randint(0,255),random.randint(0,255),random.randint(0,255)),font=font)

#code=''.join(char_list)

#但又面临的问题是POST请求时提交数据，获取不到，所以需要写入session里,并进入login函数中增加POST请求

#char_list = []

#for i in range(5):

#char = chr(random.randint(65, 109))

#char_list.append(char)

#font = ImageFont.truetype("kumo.ttf", 28)

#draw.text([i * 24, 0], char, (random.randint(0, 255), random.randint(0, 255), random.randint(0, 255)),

#font=font)

#img.save(f,'png')

#data=f.getvalue()

#code = ''.join(char_list)

#request.session['code'] = code

#return HttpResponse(data)

#以上验证码代码太长，将内容封装到BBS目录下utils目录中

from utils.random_check_code importrandom_check_code

img,code=random_check_code()

stream=BytesIO()

img.save(stream,'png')

request.session['code']=codereturnHttpResponse(stream.getvalue())#登录页面,使用Form表单#生成Form表单

from django.forms importFormfrom django.forms importwidgetsfrom django.forms importfieldsclassLoginForm(Form):

user=fields.CharField(

widget=widgets.TextInput(attrs={'class':"form-control",'placeholder':'用户名'}),

label="用户名",

required=True,

max_length=8,

min_length=2,

error_messages={'required':'用户名不能为空','min_length':'用户名不得少于2个字符','max_length':'用户名不得多于8个'}

)

pwd=fields.CharField(

widget=widgets.TextInput(attrs={'class':"form-control",'placeholder':'密码','type':'password'}),

label="密码",

required=True,

max_length=10,

min_length=2,

error_messages={'required': '密码不能为空','min_length': '密码不得少于2个字符','max_length': '密码不得多于10个'}

)

code=fields.CharField(

widget=widgets.TextInput(attrs={'class':"form-control",'placeholder':'验证码'}),

label="验证码",

required=True,

error_messages={'required':'验证码不能为空'}

)deflogin_form(request):if request.method=='GET':

obj=LoginForm()return render(request, 'login_form.html', {'obj': obj})else:

obj=LoginForm(request.POST)ifobj.is_valid():

input_user=obj.cleaned_data['user']

input_pwd=obj.cleaned_data['pwd']

input_code=obj.cleaned_data['code']

session_code=request.session.get('code')if models.UserInfo.objects.filter(username=input_user,password=input_pwd).first():if input_code.upper()==session_code.upper():return render(request,'information.html')else:return render(request, 'login_form.html', {'obj': obj, 'msg': '验证码错误'})return render(request, 'login_form.html',{'obj':obj,'msg':'用户名或密码错误'})else:

v=obj.errorsprint(v)return render(request,'login_form.html',{'obj':obj})

views