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","0")
35         return response
    else:
        if request.COOKIES.get("login_flag") == "1":
            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","1")
            return response
63         else:
63             return HttpResponseRedirect("/verifycode")

def main(request):
    if request.COOKIES.get("login_flag") == "1":
        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