BBS登录功能

BBS登录功能

一、后端实现

1.实现验证码

from PIL import Image, ImageDraw, ImageFont
import random
from io import BytesIO, StringIO


def get_color():
    return random.randint(0, 255), random.randint(0, 255), random.randint(0, 255)


def get_code(request):
    '图片验证'
    # img:标签支持1.图片二进制 2. 图片具体路径 3. 后端url请求
    # 推到思路1: 直接到后端获取目录下的路径,以二进制方式打开发送
    # with open(r'G:\python学习\Django\11Django项目\BBS\static\img\1.jpg', 'rb') as f:
    #     data = f.read()
    #
    # return HttpResponse(data)

    # 推到思路二: 利用模块产生图片, 在发送到前端 pillow

    # 1.生成一张图片对象
    # img_obj = Image.new('RGB', (260, 35), get_color())
    #
    # # 2.先利用文件操作将图片对象写入文件中
    # with open('code.png', 'wb') as f:
    #     img_obj.save(f, 'png')
    #
    # # 3. 在利用文件操作图片以二进制形式读取出来,返回给前端
    # with open('code.png', 'rb') as f:
    #     data = f.read()
    #
    # return HttpResponse(data)

    # 推到思路3: 不在利用文件获取数据 借助内存管理器

    # 1. 生成图片对象
    # img_obj = Image.new('RGB', (260, 35), get_color())
    # # 2. 生成一个内存管理器对象
    # io_obj = BytesIO()
    #
    # # 3.将io_obj当成文件句柄f
    # img_obj.save(io_obj, 'png')
    #
    # # 4 获取二进制图片发送给前端
    # return HttpResponse(io_obj.getvalue())

    # 推导思路四:在图片写入文字
    # 1. 生成图片对象
    img_obj = Image.new('RGB', (260, 35), get_color())

    # 2.生成一个画笔对象
    img_draw = ImageDraw.Draw(img_obj)

    # 3. 设置画笔字体样式(所有字体样式都是由.ttf结尾的文件控制)
    img_font = ImageFont.truetype(r'G:\python学习\Django\11Django项目\BBS\static\font\222.ttf', 30)

    # 生成随机验证码
    code = ''
    # 随机生成验证码  a~z  A~Z  0~9
    for i in range(5):
        random_upper = chr(random.randint(65, 90))
        random_lower = chr(random.randint(97, 122))
        random_int = str(random.randint(0, 9))
        res = random.choice([random_upper, random_lower, random_int])

        # 将产生的随机字符串写到图片上
        img_draw.text((i * 45 + 45, 0), res, get_color(), img_font)

        code += res

    print(code)

    # 将随机验证码存储起来, 以便其他函数调用
    request.session['code'] = code

    io_obj = BytesIO()
    img_obj.save(io_obj, 'png')

    return HttpResponse(io_obj.getvalue())

二、登录功能实现

def login(request):
    back_dic = {'code': 1000, 'msg': ""}
    if request.method == 'POST':
        print(request.POST)
        username = request.POST.get('username')
        password = request.POST.get('password')
        code = request.POST.get('code').upper()
        session_code = request.session.get('code').upper()
        if code == session_code:
            user_obj = auth.authenticate(username=username, password=password)
            if user_obj:
                back_dic['url'] = '/index/'
                # 保存用户登录状态
                auth.login(request, user_obj)  # 自动保存到session
            else:
                back_dic['code'] = ''
                back_dic['msg'] = '用户名或密码错误！'
        else:
            back_dic['code'] = ''
            back_dic['msg'] = '验证码错误！'
        return JsonResponse(back_dic)
    return render(request, '02login.html')

二、前端设计

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    {% load static %}
    <script src="{% static 'bootstrap/js/jquery.js' %}"></script>
    <script src="{% static 'bootstrap/js/bootstrap.js' %}"></script>
    <link rel="stylesheet" href="{% static 'bootstrap/css/bootstrap.css' %}">
</head>
<body>
<div class="container">
    <div class="row">
        <h1 class="text-center">登录界面</h1>
        <div class="col-md-6 col-lg-offset-3">
            <div class="form-group">
                <label for="username"> 用户名</label>
                <input type="text" id='username' name="username" class="form-control">
            </div>
            <div class="form-group">
                <label for="password"> 密 &nbsp;码:&nbsp;</label>

                <input type="password" id='password' name="password" class="form-control">
            </div>
            <div class="form-group">
                <label for="">验证码</label>
                <div class="row">
                    <div class="col-md-6">
                        <input type="text" id='code' name='code' class="form-control">
                    </div>
                    <div class="col-md-6">
                        <img src="/get_code/" alt="" width="260px" height="35px" class="img-rounded">
                    </div>
                </div>
            </div>
            <div>
                {#                    <input type="reset" value="重置" class="btn btn-primary btn-sm" style="margin: 10px 35px">#}
                <button class="btn btn-primary" id="b1">登录</button>
                <span style="color:red" id="error"></span>
            </div>
        </div>
    </div>
</div>

<script>
    // 点击图片刷新验证码
    $('img').on('click', function () {
        var img_url = $(this).attr('src') + "?";
        $(this).attr('src', img_url);

    });

    $('#b1').click(function () {
        alert(234);
        // 登录验证
        $.ajax({
            url: '',
            type: 'post',
            data: {
                'username': $('#username').val(),
                'password': $("#password").val(),
                'code': $('#code').val(),
                'csrfmiddlewaretoken': '{{ csrf_token }}'
            },
            success: function (data) {
                if (data.code == 1000) {
                    // 成功进入首页
                    location.href = data.url
                } else {
                    // 渲染错误信息
                    $('#error').text(data.msg);
                    // 失败刷新验证码
                    $('img').attr('src', '/get_code/2');
                }
            }
        });
    });
</script>
</body>
</html>

img

posted @ 2019-11-17 18:44  RandySun  阅读(590)  评论(0)  编辑  收藏  举报