Python及Django框架生成二维码的方法分析

pip install qrcode

pip install Image

qr 'http://www.ziqiangxuetang.com' > test.png

import qrcode
img = qrcode.make('http://www.tuweizhong.com')
# img <qrcode.image.pil.PilImage object at 0x1044ed9d0>
with open('test.png', 'wb') as f:
  img.save(f)

pip install git+git://github.com/ojii/pymaging.git#egg=pymaging
pip install git+git://github.com/ojii/pymaging-png.git#egg=pymaging-png

qr --factory=pymaging "Some text" > test.png

import qrcode
from qrcode.image.pure import PymagingImage
img = qrcode.make('Some data here', image_factory=PymagingImage)

django-admin.py startproject zqxtqrcode
python manage.py startapp tools

INSTALLED_APPS = (
  ...
  'tools',
)

from django.http import HttpResponse
import qrcode
from cStringIO import StringIO
def generate_qrcode(request, data):
  img = qrcode.make(data)
  buf = StringIO()
  img.save(buf)
  image_stream = buf.getvalue()
  response = HttpResponse(image_stream, content_type="image/png")
  response['Last-Modified'] = 'Mon, 27 Apr 2015 02:05:03 GMT'
  response['Cache-Control'] = 'max-age=31536000'
  return response

url(r'^qrcode/(.+)$', 'tools.views.generate_qrcode', name='qrcode'),

python manage.py syncdb
python manage.py runserver