??????????????????????? Django

1
??????????????????????? Django

• ??????????????????????????????????????(01204223)

??.??.????? ?????? ??????????????????????????????
????????????? ??????????????????????
2
????? Django
"The Web Framework for Perfectionists with
Deadlines"

• ???????????????????????????????????
• ?????????????????? 2.x (???????????? 3.x)
• ???????????????????????? Django
• Washington Post (http//www.washingtonpost.com)
• Guadian.co.uk
• E-Labsheet (http//cloud3.cpe.ku.ac.th/elab)

3
?????? HTML

• ???????????????????????? (Tag)
• ??????????????????????????????????????????????????
  ?????????????

????????
???????
lthtmlgt ltheadgt lttitlegtExamplelt/titlegt
lt/headgt ltbodygt lth1gtHellolt/h1gt Welcome
to my homepage. lt/bodygt lt/htmlgt
???? html
??????????????????
lthtmlgtltheadgtlttitlegtExamplelt/titlegtlt/headgt ltbodygtlth
1gtHellolt/h1gtWelcome to my homepage.lt/bodygtlt/htmlgt
4
???????????????????? Django
Client (Web browser)
Server (Web App)
Database
5
????????????????

• ???????????????? myweb
• ???????????? myweb ????????? ???? shape
• ???????? ????????????????????????????????????

django-admin startproject myweb cd myweb
./manage.py startapp shape
6
???????? ????????????????

• ????????? settings.py ???????? shape
  ??????????????????????????????

INSTALLED_APPS ( 'django.contrib.auth',
'django.contrib.contenttypes',
'django.contrib.sessions', 'django.contrib.sit
es', 'django.contrib.messages', 'shape',
Uncomment the next line to enable the
admin 'django.contrib.admin',
Uncomment the next line to enable admin
documentation 'django.contrib.admindocs', )
(settings.py)
7
???????????

• ???????????? index ?? shape/views.py
• ???????? ??????????????????????? request
  ???????????????????????

from django.http import HttpResponse def
index(request) return HttpResponse('Hello')
(shape/views.py)
8
????????????????? (/)

• ?????????? / ?????????????????????? index
  ???????????? urls.py

from django.conf.urls.defaults import
Uncomment the next two lines to enable the
admin from django.contrib import admin
admin.autodiscover() urlpatterns patterns('',
url(r'', 'shape.views.index'),
Example (r'first/', include('first.foo.url
s')), Uncomment the admin/doc line below
to enable admin documentation
(r'admin/doc/', include('django.contrib.admindocs
.urls')), Uncomment the next line to
enable the admin (r'admin/',
include(admin.site.urls)), )
regular expression
(urls.py)
9
???????????????

• ?????????????????????? manage.py
• ???? http//127.0.0.18000/ ???????? Location
  ????????????????
• ????????? http//08000 ????????????

./manage.py runserver Validating models... 0
errors found Django version 1.2.5, using
settings 'myweb.settings' Development server is
running at http//127.0.0.18000/ Quit the server
with CONTROL-C.
10
???????

• ?????????????????????? ??????????????????
  HttpResponse ?????????????????????????????
• ????????????? tag ???? ? ??????
• Django ?????????????????? HttpResponse ???
  "???????" (Template) ????????????????????
• ??????????????????????????? HTML
• ??? Web Designer ???????????????
  ??????????????????
• ???????????????????????????????????? HTML Editor
• ???? DreamWeaver, Kompozer

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???????????? index.html

• ?????????????????????????
• ??????????? templates/index.html ???????
  (?????????? Kompozer ????????????? HTML Editor
  ???????)

mkdir templates
(templates/index.html)
????????? H1
???????????????? shape/rectangle/, shape/circle/
??? shape/triangle/ ????????
?????????????
Horizontal Bar
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???????????????????

• ????????? settings.py ??????????????????????????

import os PROJECT_DIR os.path.dirname(__file__)
TEMPLATE_DIRS ( os.path.join(PROJECT_DIR
, 'templates'), )
(settings.py)
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????????????????????????

• ????????????? index ?? shape/views.py
• ????????? render_to_response ???????????????
  HttpResponse ??????????
• ????????????????????????????????

from django.http import HttpResponse from
django.shortcuts import render_to_response def
index(request) return render_to_response('ind
ex.html')
(shape/views.py)
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HTML Form

• ?????? HTML ??????????????????????????????????????
  ?

15
?????????????? /shape/rectangle

• ????? URL mapping ?? urls.py

from django.conf.urls.defaults import
Uncomment the next two lines to enable the
admin from django.contrib import admin
admin.autodiscover() urlpatterns patterns('',
url(r'', 'shape.views.index'),
url(r'shape/rectangle/', 'shape.views.rectangle_
form'), Example (r'first/',
include('first.foo.urls')), Uncomment the
admin/doc line below to enable admin
documentation (r'admin/doc/',
include('django.contrib.admindocs.urls')),
Uncomment the next line to enable the admin
(r'admin/', include(admin.site.urls)), )
(urls.py)
16
???????? rectangle_form

• ??????????????????? views.py

def rectangle_form(request) return
render_to_response('rectangle.html')
(shape/views.py)
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?????????? rectangle.html ???????????

• ????????????????????? /shape/rectangle/
• ??????? Action ???? calculate ?????????? Submit
  ????????????????? /shape/rectangle/calculate

???? width
???? height
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????????????????????????

• ??????????????????????????????????????????????????
  ????????????????????? ????? ?????????? ???
• ???????????????? result.html ??????

??????????????????????????????????
(templates/result.html)
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???????????????????

• ??????????????? views.py

????????????????????????????????
def calculate(request, shape_type) if
shape_type 'rectangle' w
float(request.POST'width') h
float(request.POST'height') circum
2(wh) area wh return
render_to_response('result.html',
'area' area, 'circum' circum )
(shape/views.py)
???????????????????????????????
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??????????????

• ??????????????????????????????????????
• /shape/rectangle/calculate
• /shape/circle/calculate
• /shape/triangle/calculate
• ???????????????????? urls.py

urlpatterns patterns('', url(r'',
'shape.views.index'), url(r'shape/rectangle/
', 'shape.views.rectangle_form'),
url(r'shape/(.)/calculate', 'shape.views.calcul
ate'), )
(urls.py)
??????????????????????????????????????????????
21
??????????? CSRF Protection

• Django ????????????? Cross-Site Request Forgery
  (CSRF) ????????????????????????????????
• ??????????????????? calculate
• ???????????????????????????????????????
• ????? shape/views.py ?????? _at_csrf_except
  decorator ?????? calculate

from django.views.decorators.csrf import
csrf_exempt _at_csrf_exempt def
calculate(request, shape_type)
(shape/views.py)
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?????????/???????

• ????????????????????????????????????????
• ????? ???????????
• ?????????? ????????????????????????