任務描述：實現登錄和退出 1.項目結構 2.源代碼 urls.py views.py index,html login.html regist.html models.py 3.運行測試 未登錄訪問： 登錄後訪問： 退出 ...
任務描述：實現登錄和退出
1.項目結構
2.源代碼
urls.py
from django.conf.urls import url from django.contrib import admin from user import views admin.autodiscover() urlpatterns = [ url(r'^admin/', admin.site.urls), url(r'index/', views.index), url(r'user/regist/', views.regist), url(r'user/login/', views.login), url(r'user/logout/', views.logout), ]
views.py
from django.shortcuts import render
from django import forms
from django.http import HttpResponseRedirect, HttpResponse
import sqlite3
from . import models
class UserForm(forms.Form):
username = forms.CharField(max_length=100)
password = forms.CharField(widget=forms.PasswordInput)
headimg = forms.FileField()
class LoginForm(forms.Form):
username = forms.CharField(max_length=100)
password = forms.CharField(widget=forms.PasswordInput)
def insert(user):
# 連接數據保存
models.User.objects.create(username=user.username, password=user.password, headimg=user.headimg)
return True
def find_user(user):
users = models.User.objects.filter(username=user.username, password=user.password)
if users:
return True
else:
return False
def regist(request):
context = {}
if request.method == 'POST':
uf = UserForm(request.POST, request.FILES)
if uf.is_valid():
username = uf.cleaned_data['username']
password = uf.cleaned_data['password']
headimg = uf.cleaned_data['headimg']
user = models.User(username=username, headimg=headimg.name, password=password)
# save headimg
fp = open('upload/' + headimg.name, 'wb')
s = headimg.read()
fp.write(s)
fp.close()
if insert(user):
return HttpResponseRedirect('/user/login') # 重定向到登錄界面
else:
uf = UserForm()
context = {'uf': uf}
return render(request, 'user/regist.html', context)
def login(request):
context = {}
if request.method == 'POST':
uf = LoginForm(request.POST)
if uf.is_valid():
username = uf.cleaned_data['username']
password = uf.cleaned_data['password']
user = models.User(username=username, password=password)
if find_user(user):
print('find it!')
# session
request.session['username'] = username
response = HttpResponseRedirect('/index/')
# cookie
# response.set_cookie('username', username, 3600) # 將username寫入瀏覽器cookie,失效時間為3600
response.set_cookie('password', password, 3600) # 將password寫入瀏覽器cookie,失效時間為3600
return response
else:
return render(request,'/user/login/',context)
else:
uf = LoginForm()
print('not find it!')
context = {'uf': uf}
return render(request, 'user/login.html', context)
def logout(request):
response = HttpResponseRedirect('/user/login/')
try:
del request.session['username']
except Exception as e:
print(e)
# response.delete_cookie('username')
response.delete_cookie('password') # 刪除cookie
return response
def index(request):
context = {}
# session
username = request.session.get('username', 'anybody')
context['username'] = username
# cookie
if request.COOKIES:
print(request.COOKIES)
return render(request, 'index.html', context)
index,html
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>index</title>
</head>
<body>
<h2>This is index page!</h2>
<p>welcome，{{username}} ！</p>
<a href="/user/logout/">Logout</a>
</body>
</html>
login.html
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>login</title>
</head>
<body>
<form method="post" action="/user/login/">
{% csrf_token %}
{{uf.as_p}}
<input type="submit" value="submit">
</form>
</body>
</html>
regist.html
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>regist</title>
</head>
<body>
<h3>regist</h3>
<hr>
<form method="post" enctype="multipart/form-data">
{% csrf_token %}
{{uf.as_p}}
<input type="submit" value="submit">
</form>
</body>
</html>
models.py
from django.db import models class User(models.Model): username = models.CharField(max_length=100) password = models.CharField(max_length=20, default='123456') headimg = models.FileField() def __str__(self): return self.username + ',' + self.password + ',' + self.headimg.name
3.運行測試
未登錄訪問：
登錄後訪問：
退出
