<div class="container"><div class="row"><div class="col-md-8 col-md-offset-2"><form action="" method="post">{% csrf_token %}<div class="form-group"><lable for="">用户名</lable><input type="text" class="form-control" id="user"></div><div class="form-group"><lable for="">密码</lable><input type="password" class="form-control" id="password"></div><div class="form-group"><lable for="">验证码</lable><div class="row"><div class="col-md-6"><input type="text" class="form-control" id="validcode"></div><div class="col-md-6"><img src="/valid_Image/" alt="" class="valid-img"></div><div class="col-md-3"><input type="button"  id="refresh"></div></div></div><input type="button" class="btn btn-primary" value="登录"><span class="error-info"></span></form></div></div>
</div>

<script>$(".btn-primary").click(function () {$.ajax({url:'',type:'post',data:{user:$('#user').val(),password:$('#password').val(),validcode:$('#validcode').val(),csrfmiddlewaretoken:$("[name='csrfmiddlewaretoken']").val(),},success:function (response) {//判断是否通过验证if (response.user){$('.error-info').html(response.user).css('color','black')}else{$('.error-info').html(response.error).css('color','red')}}})});//点击验证码图片异步刷新$(".valid-img").click(function () {{#src=$('.valid-img').prop('src')+"?";#}{#$('.valid-img').prop('src',src);#}this.src+='?';})
</script>

from django.shortcuts import render,HttpResponse
from django.contrib import auth#登录视图函数
def login(request):#判断请求方式if request.is_ajax():#获得前端用户登陆数据user=request.POST.get('user')password=request.POST.get('password')validcode=request.POST.get('validcode')#创建响应数据字典response = {"user": None, "error": ""}#判断验证码是否一致if validcode.upper()==request.session.get('valid_text').upper():#验证码一直后判断用户名与密码是否正确，如正确返回用户对象user_obj=auth.authenticate(usename=user,password=password)if user_obj:response['user']=userelse:response['error']="用户名或者密码错误"#ajax请求返回一个jsonelse:response['user']='验证码错误'return JsonResponse(response)if  request.request.method=='GET':return render(request,'login.html')#生成验证码图片
def valid_Image(request):from PIL import Image,ImageDraw,ImageFontfrom io import BytesIOimport random#获得随机颜色def get_random_color():return(random.randint(0,255),random.randint(0,255),random.randint(0,255))#生成背景图片img=Image.new('RGB',(130,40),get_random_color())#使用画笔draw=ImageDraw.Draw(img)#设置验证码字体（字体文件与路径需自己设置）font=ImageFont.truetype('static/Hollywood Hills Italic.ttf',20)#创建存储验证码字符串的变量valid_text=''#生成验证码（包括数字与大小写字母）for i in range(5):random_Num=str(random.randint(0,9))random_Lowchar=chr(random.randint(97,122))random_Upchar = chr(random.randint(65, 90))random_text=random.choice([random_Num,random_Lowchar,random_Upchar])draw.text((i*20+10,5),random_text,get_random_color(),font)valid_text+=random_text#生成验证码图片内的干扰线与噪点width=130height=40for i in range(10):x1=random.randint(0,width)y1=random.randint(0,height)x2 = random.randint(0, width)y2 = random.randint(0, height)draw.line((x1,y1,x2,y2),fill=get_random_color())for i in range(120):x1=random.randint(0,width)y1=random.randint(0,height)draw.point((x1,y1),fill=get_random_color())#设置sessionrequest.session['valid_text']=valid_text#将生成的图片存在内存中f=BytesIO()img.save(f,'jpeg')data=f.getvalue()f.close()#返回验证码图片return HttpResponse(data)