Django学习笔记第六篇--实战练习二--简易实现登录注册功能demo

一、绪论：

　　简易实现登录功能demo，并没有使用默认身份验证模块，所以做的也很差，关闭了csrf保护，没有认证处理cookie和session，只是简单实现了功能。另外所谓的验证码功能是伪的。

二、

　　app下的views.py  models.py   functionlib.py：

 #-*- coding:utf-8 -*-
 from functionlib import gethash
 from django.shortcuts import render,render_to_response
 from django.http import HttpResponse,HttpResponseRedirect
 from models import LoginUser

 # Create your views here.

 def register(request):
     if request.method != 'POST':
         return render_to_response("register.html")
     else:
         username = request.POST["user"]
         password = request.POST["pswd"]
         emailstr = request.POST["email"]
         phonestr = request.POST["phone"]
         if None in [username,password,emailstr,phonestr]:
             return render_to_response("register.html")
         else:
             password = gethash(password)
             print "ok"
             try:
                 LoginUser.objects.create(username=username,password=password,emailstr=emailstr,phonestr=phonestr)
             except Exception,ex:
                 return render_to_response("register.html")
             return HttpResponseRedirect("/login")

 def login(request):
     print request.COOKIES
     if request.method != 'POST':
         response = render_to_response("login.html")
         response.set_cookie("login_name",None)
         response.set_cookie("login_flag","")
35         return response
     else:
         if request.COOKIES.get("login_flag") == "":
             loginname = request.COOKIES.get("login_name")
             return HttpResponseRedirect("/mainpage?name=%s"%loginname)
         else:
             user = request.POST["user"]
             pswd = request.POST["pswd"]
             obj = LoginUser.objects.get(username=user)
             if obj.password == gethash(pswd):
                 response = HttpResponseRedirect("/verifycode")
                 response.set_cookie("login_name",user)
                 return response
             else:
                 return HttpResponseRedirect("/login")

 def verify(request):
     if request.method != 'POST':
         return render_to_response("verify.html")
     else:
         if request.POST["code"] == "bobac":
             user = request.COOKIES.get("login_name")
             print user
             print request.COOKIES
             if user == None:
                 return HttpResponseRedirect("/login")
             response = HttpResponseRedirect("/mainpage?name=%s"%user)
             response.set_cookie("login_flag","")
             return response
63         else:
63             return HttpResponseRedirect("/verifycode")

 def main(request):
     if request.COOKIES.get("login_flag") == "":
         return HttpResponse("Welcome %s!"%request.GET["name"])
     else:
         return HttpResponseRedirect("/login")

 from django.db import models

 # Create your models here.

 class LoginUser(models.Model):
     username = models.CharField(max_length=20)
     password = models.CharField(max_length=64)
     emailstr = models.CharField(max_length=50)
     phonestr = models.CharField(max_length=12)

 import hashlib

 def gethash(text):
     md5 = hashlib.md5()
     md5.update(text)
     return md5.hexdigest()

　　mysite1下的settings.py 和 urls.py

 """
 Django settings for mysite1 project.

 Generated by 'django-admin startproject' using Django 1.8.

 For more information on this file, see
 https://docs.djangoproject.com/en/1.8/topics/settings/

 For the full list of settings and their values, see
 https://docs.djangoproject.com/en/1.8/ref/settings/
 """

 # Build paths inside the project like this: os.path.join(BASE_DIR, ...)
 import os

 BASE_DIR = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))

 # Quick-start development settings - unsuitable for production
 # See https://docs.djangoproject.com/en/1.8/howto/deployment/checklist/

 # SECURITY WARNING: keep the secret key used in production secret!
 SECRET_KEY = 't!+*ii3=^bpde5_&sehb41uqn0^tfe_1x#ews9banz1!q$bo)2'

 # SECURITY WARNING: don't run with debug turned on in production!
 DEBUG = True

 ALLOWED_HOSTS = []

 # Application definition

 INSTALLED_APPS = (
     'django.contrib.admin',
     'django.contrib.auth',
     'django.contrib.contenttypes',
     'django.contrib.sessions',
     'django.contrib.messages',
     'django.contrib.staticfiles',
     'myapp1'
 )

 MIDDLEWARE_CLASSES = (
     'django.contrib.sessions.middleware.SessionMiddleware',
     'django.middleware.common.CommonMiddleware',
     #'django.middleware.csrf.CsrfViewMiddleware',
     'django.contrib.auth.middleware.AuthenticationMiddleware',
     'django.contrib.auth.middleware.SessionAuthenticationMiddleware',
     'django.contrib.messages.middleware.MessageMiddleware',
     'django.middleware.clickjacking.XFrameOptionsMiddleware',
     'django.middleware.security.SecurityMiddleware',
 )

 ROOT_URLCONF = 'mysite1.urls'

 TEMPLATES = [
     {
         'BACKEND': 'django.template.backends.django.DjangoTemplates',
         'DIRS': [BASE_DIR+"/templates/"],
         'APP_DIRS': True,
         'OPTIONS': {
             'context_processors': [
                 'django.template.context_processors.debug',
                 'django.template.context_processors.request',
                 'django.contrib.auth.context_processors.auth',
                 'django.contrib.messages.context_processors.messages',
             ],
         },
     },
 ]

 WSGI_APPLICATION = 'mysite1.wsgi.application'

 # Database
 # https://docs.djangoproject.com/en/1.8/ref/settings/#databases

 DATABASES = {
     'default': {
         'ENGINE': 'django.db.backends.mysql',
         'NAME': 'mysite1',
         'USER': 'root',
         'HOST': '127.0.0.1',
         'PORT': 3306,
     }
 }

 # Internationalization
 # https://docs.djangoproject.com/en/1.8/topics/i18n/

 LANGUAGE_CODE = 'en-us'

 TIME_ZONE = 'UTC'

 USE_I18N = True

 USE_L10N = True

 USE_TZ = True

 # Static files (CSS, JavaScript, Images)
 # https://docs.djangoproject.com/en/1.8/howto/static-files/

 STATIC_URL = '/static/'

 from django.conf.urls import include, url
 from django.contrib import admin
 from myapp1 import views

 urlpatterns = [
     # Examples:
     # url(r'^$', 'mysite1.views.home', name='home'),
     # url(r'^blog/', include('blog.urls')),

     url(r'^admin/', include(admin.site.urls)),
     url(r'^register/', "myapp1.views.register"),
     url(r'^login/', "myapp1.views.login"),
     url(r'^mainpage/', "myapp1.views.main"),
     url(r'^verifycode/', "myapp1.views.verify"),
 ]

templates下几个静态文件：

 <!DOCTYPE html>
 <html>
 <head>
     <title>陈然的网站注册</title>
 </head>
 <body>
     <center>
         <form action="http://127.0.0.1:8000/register/" method="post">
             <p>用户名：<input type="text" name="user"/></p>
             <p>密  码：<input type="password" name="pswd"/></p>
             <p>邮  箱：<input type="text" name="email"/></p>
             <p>手  机：<input type="text" name="phone"/></p>
             <input type="submit" value="注册">

         </form>
     </center>
 </body>
 </html>

<!DOCTYPE html>
<html>
<head>
    <title>陈然的网站登录</title>
</head>
<body>
    <center>
        <form action="http://127.0.0.1:8000/login/" method="post">
            <p>用户名：<input type="text" name="user"/></p>
            <p>密  码：<input type="password" name="pswd"/></p>
            <input type="submit" value="登录">

        </form>
    </center>
</body>
</html>

总结知识点

1、神坑：html中action的url最后要加/否则会有报错

2、重定向和返回文件：

 #1返回静态文件：
 render_to_response("index.html")
 #这个路径在settings.py中保存在templates的DIR list中

 #2重定向：
 HttpResponseRedirect("/main/xxx")#参数是相对URL

3、后台管理：

 python manage.py migrate  #创建默认数据库
 python manage.py createsuperuser#创建超级用户管理后台的
 python manage.py makemigrations myapp1#更新app库结构
 python manage.py migrate myapp1#创建app的库表结构