注册/登陆验证码

if verifycode.upper() != request.session['verifycode']:
　　return JsonResponse({'res': 2})

 

# 3.进行处理:根据用户名和密码查找账户信息
    passport = Passport.objects.get_one_passport(username=username, password=password)

    if passport:
        # 用户名密码正确
        # 获取session中的url_path
        # if request.session.has_key('url_path'):
        #     next_url = request.session.get('url_path')
        # else:
        #     next_url = reverse('books:index')
        next_url = reverse('books:index') # /user/
　　　　　　next_url = request.session.get('url_path', reverse('books:index')) # /user/
if next_url=='/user/register_handle/' or next_url.startswith('/user/verifycode/'):
next_url = '/'
        jres = JsonResponse({'res': 1, 'next_url': next_url})
　　　　　
        # 判断是否需要记住用户名
        if remember == 'true':
            # 记住用户名
            jres.set_cookie('username', username, max_age=7*24*3600)
        else:
            # 不要记住用户名
            jres.delete_cookie('username')

        # 记住用户的登录状态
        request.session['islogin'] = True
        request.session['username'] = username
        request.session['passport_id'] = passport.id
        return jres
    else:
        # 用户名或密码错误
        return JsonResponse({'res': 0})


前端代码

$(function () {
        $('#btnLogin').click(function () {
            // 获取用户名和密码
            username = $('#username').val()
            password = $('#pwd').val()
            csrf = $('input[name="csrfmiddlewaretoken"]').val()
            remember = $('input[name="remember"]').prop('checked')
            vc = $('input[name="vc"]').val()
            // 发起ajax请求
            params = {
            	'username': username,
            	'password': password,
                'csrfmiddlewaretoken': csrf,
                'remember': remember,
                'verifycode': vc,
            }
            console.log('params: ', params)
            $.post('/user/login_check/', params, function (data) {
                // 用户名密码错误 {'res':0}
                // 登录成功 {'res':1}
                console.log('data: ', data)
                if (data.res == 0){
                    $('#username').next().html('用户名或密码错误').show()
                }
                else
                {
                    // 跳转页面
                    location.href = data.next_url // /user/
                }
            })
        })

　　生成二维码的view函数

def verifycode(request):
    #引入绘图模块
    from PIL import Image, ImageDraw, ImageFont
    #引入随机函数模块
    import random
    #定义变量，用于画面的背景色、宽、高
    bgcolor = (random.randrange(20, 100), random.randrange(
        20, 100), 255)
    width = 100
    height = 25
    #创建画面对象
    im = Image.new('RGB', (width, height), bgcolor)
    #创建画笔对象
    draw = ImageDraw.Draw(im)
    #调用画笔的point()函数绘制噪点
    for i in range(0, 100):
        xy = (random.randrange(0, width), random.randrange(0, height))
        fill = (random.randrange(0, 255), 255, random.randrange(0, 255))
        draw.point(xy, fill=fill)
    #定义验证码的备选值
    str1 = 'ABCD123EFGHIJK456LMNOPQRS789TUVWXYZ0'
    #随机选取4个值作为验证码
    rand_str = ''
    for i in range(0, 4):
        rand_str += str1[random.randrange(0, len(str1))]
    #构造字体对象
    font = ImageFont.truetype("/usr/share/fonts/truetype/abyssinica.ttf", 15)
    #构造字体颜色
    fontcolor = (255, random.randrange(0, 255), random.randrange(0, 255))
    #绘制4个字
    draw.text((5, 2), rand_str[0], font=font, fill=fontcolor)
    draw.text((25, 2), rand_str[1], font=font, fill=fontcolor)
    draw.text((50, 2), rand_str[2], font=font, fill=fontcolor)
    draw.text((75, 2), rand_str[3], font=font, fill=fontcolor)
    #释放画笔
    del draw
    #存入session，用于做进一步验证
    request.session['verifycode'] = rand_str
    #内存文件操作
    import io
    buf = io.BytesIO()
    #将图片保存在内存中，文件类型为png
    im.save(buf, 'png')
    #将内存中的图片数据返回给客户端，MIME类型为图片png
    return HttpResponse(buf.getvalue(), 'image/png')

　　前端

<img id='verifycode' class="fl" style="width: 33%;" src="/user/verifycode/?1" alt="Check"/>//注意后边是问号
<span id='verifycodeChange' class="fl" style="font-size: 14px;width: 26%">换一个</span>

 $('#verifycodeChange').css('cursor','pointer').click(function() {
            alert(1)
            $('#verifycode').attr('src',$('#verifycode').attr('src')+1);
            alert(2)
        });