【Django】教程-1-安装+创建项目+目录结构介绍
【Django】教程-2-前端-目录结构介绍
【Django】教程-3-数据库相关介绍
【Django】教程-4-一个增删改查的Demo
【Django】教程-5-ModelForm增删改查+规则校验【正则+钩子函数】
【Django】教程-6-搜索框-条件查询前后端
【Django】教程-7-分页，默认使用django的
【Django】教程-8-页面时间组件
【Django】教程-9-登录+退出
【Django】教程-10-ajax请求Demo，结合使用
【Django】教程-11-ajax弹窗实现增删改查
【Django】教程-12-柱状图
【Django】教程-13-饼图，折线图
19 .验证码+登录页
验证码工具类 captcha_utils.py
from PIL import Image, ImageDraw, ImageFont
import random
import stringdef generate_captcha(length=4, size=(120, 30), font_size=20):""" 一个可以返回验证码的，方法Returns:list:- image，验证码图- captcha_text，验证码字符串"""# 定义验证码字符集characters = string.ascii_letters + string.digits# 随机生成验证码captcha_text = ''.join(random.choice(characters) for _ in range(length))# 创建一个彩色图像，背景颜色选择较浅的色调background_color = (random.randint(200, 255),random.randint(200, 255),random.randint(200, 255))image = Image.new('RGB', size, color=background_color)draw = ImageDraw.Draw(image)# 选择字体font = ImageFont.load_default()# 也可以使用自定义字体，例如：# font = ImageFont.truetype('arial.ttf', font_size)# 绘制验证码字符，字体颜色选择较深的色调for i, char in enumerate(captcha_text):char_color = (random.randint(0, 100),random.randint(0, 100),random.randint(0, 100))draw.text((10 + i * 25, 10), char, fill=char_color, font=font)# 添加干扰线for _ in range(5):line_color = (random.randint(150, 255),random.randint(150, 255),random.randint(150, 255))x1 = random.randint(0, size[0])y1 = random.randint(0, size[1])x2 = random.randint(0, size[0])y2 = random.randint(0, size[1])draw.line((x1, y1, x2, y2), fill=line_color, width=2)# 添加干扰点for _ in range(20):point_color = (random.randint(150, 255),random.randint(150, 255),random.randint(150, 255))x = random.randint(0, size[0])y = random.randint(0, size[1])draw.point((x, y), fill=point_color)return image, captcha_text登录页 login.html
{% load static %}
<!DOCTYPE html>
<html lang="zh-CN">
<head><meta charset="UTF-8"><meta name="viewport" content="width=device-width, initial-scale=1.0"><title>登录页面</title><!-- 引入 Bootstrap 的 CSS 文件 --><link rel="stylesheet" href="{% static 'plugins/bootstrap-3.4.1/css/bootstrap.css' %}"/><style>/* 自定义一些样式让页面更美观 */body {background-color: #f8f9fa;display: flex;justify-content: center;align-items: center;min-height: 100vh;margin: 0;}.login-card {background-color: white;border-radius: 8px;box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);padding: 2rem;width: 350px;}.form-group {margin-bottom: 1.5rem;}.form-control {height: calc(2.25rem + 2px);}.btn-login {width: 100%;padding: 0.75rem;background-color: #007bff;color: white;border: none;border-radius: 4px;cursor: pointer;}.btn-login:hover {background-color: #0056b3;}.register-link {text-align: center;margin-top: 1rem;}.register-link a {color: #007bff;text-decoration: none;}.register-link a:hover {text-decoration: underline;}</style>
</head><body>
<div class="container login-card"><h2 class="text-center mb-4">用户登录</h2><form method="post" novalidate>{% csrf_token %}<div class="form-group"><label>用户名:</label>{{ user.username }}<span style="color: red">{{ user.username.errors.0 }}</span></div><div class="form-group"><label>密码:</label>{{ user.password }}<span style="color: red">{{ user.password.errors.0 }}</span></div><div class="form-group"><label>验证码:</label><img id="captcha-image" class="img-fluid" src="/captcha/get" >{{ user.captcha }}<span style="color: red">{{ user.captcha.errors.0 }}</span></div><button type="submit" class="btn-login">登录</button></form><div class="register-link">还没有账号？<a href="#">立即注册</a></div>
</div><script src="{% static 'js/jquery-3.6.0.min.js' %}"></script>
<script src="{% static 'plugins/bootstrap-3.4.1/js/bootstrap.js' %}"></script>
<script>$(document).ready(function () {$('#captcha-image').click(function () {$.ajax({url: '/captcha/get',type: 'GET',success: function (response) {$('#captcha-image').attr('src', '/captcha/get');// 可以在这里清空验证码输入框{#$('input[name="captcha"]').val('');#}},error: function () {alert('刷新验证码失败');}});});});
</script>
</body>
</html>
业务控制层login_view.py
import iofrom django.http import HttpResponse, JsonResponse
from django.shortcuts import render, redirect
from django.views.decorators.csrf import csrf_exempt
from appTang.forms import LoginForm
from appTang.models import Admin
from appTang.util.captcha_utils import generate_captchadef login(req):"""用户登录"""""" modelform 方式添加用户"""if req.method == 'GET':user = LoginForm()return render(req, 'login/login.html', {"user": user})# 用户post提交,数据校验user = LoginForm(data=req.POST)if user.is_valid():# username = req.POST.get("username")username = user.clean_username()user = Admin.objects.filter(username=username).first()# 需要添加用户认证成功信息req.session["info"] = {"username": username, 'id': user.id}captcha = req.POST.get("captcha")image_code = req.session.get('captcha', '') # 超时时，没有，给个''# 不区分大小写比较if image_code.upper() == captcha.upper():# 登录成功设置session，超时时间req.session.set_expiry(60 * 60 * 24 * 7) # 7天免登录return redirect("/admin/list")else:user = LoginForm(data=req.POST)user.add_error('captcha', '验证码输入错误')# # 校验失败, 在页面上展示错误信息return render(req, 'login/login.html', {"user": user})def logout(req):"""注销"""req.session.clear();return redirect("/login/")def get_captcha(request):""" 获取 验证码 """image, captcha_text = generate_captcha()# 将验证码存储在会话中request.session['captcha'] = captcha_text# 设置超时时间request.session.set_expiry(60)# 将图片保存到内存中buffer = io.BytesIO()image.save(buffer, 'PNG')# buffer.seek(0)print(captcha_text)# 返回图片响应return HttpResponse(buffer.getvalue())
forms.py
from django import forms
from django.core.exceptions import ValidationError
from django.core.validators import RegexValidatorfrom . import models
from .models import Department, UserInfo, Admin, Order
from .util.md5 import md5class BootstrapModelForm(forms.ModelForm):def __init__(self, *args, **kwargs):super().__init__(*args, **kwargs)# 循环Modelform中所有字段，给每个字段插件设置for name, field in self.fields.items():if field.widget.attrs:field.widget.attrs["class"] = "form-control"field.widget.attrs["placeholder"] = field.labelelse:field.widget.attrs = {"class": "form-control", "placeholder": field.label}# 登录Form
class LoginForm(BootstrapModelForm):captcha = forms.CharField(label="验证码", widget=forms.TextInput())class Meta:model = Admin# 字段按照顺序加载fields = ['username', 'password', 'captcha']widgets = {"password": forms.PasswordInput(render_value=True)}def clean_username(self):username = self.cleaned_data.get("username")if not Admin.objects.filter(username=username).exists():# raise ValidationError("用户名不存在！")raise ValidationError("用户名或密码错误！")return usernamedef clean_password(self):password = self.cleaned_data.get("password")username = self.cleaned_data.get("username")if not Admin.objects.filter(username=username, password=md5(password)).exists():# raise ValidationError("密码不正确！")raise ValidationError("用户名或密码错误！")return md5(password)
models.py
from django.utils import timezone
from django.db import modelsclass Admin(models.Model):"""管理员"""username = models.CharField(verbose_name="用户名", max_length=32)password = models.CharField(verbose_name="密码", max_length=64)
