手撸系列1完整的登录功能
1.完整的登录功能
笔记
1 login.html ***重点***1 action:提交到后台的地址三种写法: 1 http://127.0.0.1:8000/login 2 /login/ 推荐用 3 空 2 method post方式 3 <input type="submit" value="提交">或<button></button> type不可以是button <form action="http://127.0.0.1:8000/login" method="post"> <p>用户名:<input type="text" name="name" class="form-control"></p> <p > 密码:<input type="password" name="pwd" class="form-control"> </p> <input type="submit" value="提交"> </form> 2 视图层: 1 request.method ----前台提交过来请求的方式 2 request.POST(相当于字典)----post形式提交过来的数据,(http请求报文的请求体重) 3 request.POST.get('name') ----推荐用get取值(取出列表最后一个值) 4 request.POST.getlist('name')-----取出列表所有的值_ 5 前台get方式提交的数据,从request.GET字典里取 3 链接数据库(防止注入,推荐以下写法) cur.execute('select * from user where name=%s and password=%s ',[name,pwd])
post请求
login.html文件
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <link rel="stylesheet" href="/static/css/bootstrap-3.3.7-dist/css/bootstrap.css"> {# 注意导入css文件路径的正确,后台可以用console查看#} <link rel="stylesheet" href="/static/mycss.css"> <title>登陆</title> </head> <body> <h1>登录</h1> <div class="col-md-6 col-md-offset-3"> {# <form action="http://127.0.0.1:8000/hello" method="post">#} <form action="/hello/" method="post"> <p>用户名1:<input type="text" name="name" class="form-control"></p> <p>用户名2:<input type="text" name="name" class="form-control"></p> <p>密码:<input type="password" name="pwd" class="form-control"></p> {# 用户名1，用户名2，密码打包发到请求体里面#} <input type="submit" value="提交"> </form> </div> </body> </html>
记得setting文件的静态配置
urls文件
from django.conf.urls import url from django.contrib import admin from app01 import views urlpatterns = [ url(r'^admin/', admin.site.urls), url('hello',views.loginhtml), ]
views文件
from django.shortcuts import render,HttpResponse import pymysql def loginhtml(request): print('提交') #大写 print(request.method) if request.method=="GET": return render(request,'login.html') elif request.method=="POST":#从请求体里面拿出来 print(request.POST) print('========') name=request.POST.get('name') # 取的是后面一个 pwd=request.POST.get('pwd') l1_name=request.POST.getlist('name')#取多个值用getlist print(type(request.POST)) print(l1_name) from django.http.request import QueryDict print(name) conn=pymysql.connect(host="127.0.0.1",port=3306,db="",password="")#取完之后连接数据库做查询 cur=conn.cursor() cur.execute('select*from user where name=%s and password=%s',[name,pwd])
get请求
login.html文件
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <link rel="stylesheet" href="/static/css/bootstrap-3.3.7-dist/css/bootstrap.css"> {# 注意导入css文件路径的正确,后台可以用console查看#} <link rel="stylesheet" href="/static/mycss.css"> <title>登陆</title> </head> <body> <h1>登录</h1> <div class="col-md-6 col-md-offset-3"> {# <form action="http://127.0.0.1:8000/hello" method="post">#} <form action="/getqingqiu/" method="get"> {# action=这个是路径#} <p>用户名1:<input type="text" name="name" class="form-control"></p> <p>用户名2:<input type="text" name="name" class="form-control"></p> <p>密码:<input type="password" name="pwd" class="form-control"></p> {# 用户名1，用户名2，密码打包发到请求体里面#} <input type="submit" value="提交"> </form> </div> </body> </html>
urls文件
from django.conf.urls import url from django.contrib import admin from app01 import views urlpatterns = [ url(r'^admin/', admin.site.urls), url('hello',views.loginhtml), url('getqingqiu',views.login2) ]
views文件
from django.shortcuts import render,HttpResponse import pymysql def loginhtml(request): print('提交') #大写 print(request.method) if request.method=="GET": return render(request,'login.html') elif request.method=="POST":#从请求体里面拿出来 print(request.POST) print('========') name=request.POST.get('name') # 取的是后面一个 pwd=request.POST.get('pwd') l1_name=request.POST.getlist('name')#取多个值用getlist print(type(request.POST)) print(l1_name) from django.http.request import QueryDict print(name) conn=pymysql.connect(host="127.0.0.1",port=3306,db="",password="")#取完之后连接数据库做查询 cur=conn.cursor() cur.execute('select*from user where name=%s and password=%s',[name,pwd]) def login2(request): if request.method=="GET": print(request.GET) return HttpResponse("OK")
