生成 CSV 文件
CSV 是一种简单的数据格式，通常为电子表格软件所使用。 它主要是由一系列的表格行组成，每行中单元格之间使用逗号(CSV 是 逗号分隔数值(comma-separated values) 的缩写)隔开。
import csv
from django.http import HttpResponse
# Number of unruly passengers each year 1995 - 2005. In a real application
# this would likely come from a database or some other back-end data store.
UNRULY_PASSENGERS = [146,184,235,200,226,251,299,273,281,304,203]
def unruly_passengers_csv(request):
# Create the HttpResponse object with the appropriate CSV header.
response = HttpResponse(mimetype='text/csv')
response['Content-Disposition'] = 'attachment; filename=unruly.csv'
# Create the CSV writer using the HttpResponse as the "file."
writer = csv.writer(response)
writer.writerow(['Year', 'Unruly Airline Passengers'])
for (year, num) in zip(range(1995, 2006), UNRULY_PASSENGERS):
writer.writerow([year, num])
return response
生成 PDF 文件
需要安装 ReportLab 库
from reportlab.pdfgen import canvas
from django.http import HttpResponse
def hello_pdf(request):
# Create the HttpResponse object with the appropriate PDF headers.
response = HttpResponse(mimetype='application/pdf')
response['Content-Disposition'] = 'attachment; filename=hello.pdf'
# Create the PDF object, using the response object as its "file."
p = canvas.Canvas(response)
# Draw things on the PDF. Here's where the PDF generation happens.
# See the ReportLab documentation for the full list of functionality.
p.drawString(100, 100, "Hello world.")
# Close the PDF object cleanly, and we're done.
p.showPage()
p.save()
return response
cStringIO 库存放临时生成的 PDF 文件
from cStringIO import StringIO
from reportlab.pdfgen import canvas
from django.http import HttpResponse
def hello_pdf(request):
# Create the HttpResponse object with the appropriate PDF headers.
response = HttpResponse(mimetype='application/pdf')
response['Content-Disposition'] = 'attachment; filename=hello.pdf'
temp = StringIO()
# Create the PDF object, using the StringIO object as its "file."
p = canvas.Canvas(temp)
# Draw things on the PDF. Here's where the PDF generation happens.
# See the ReportLab documentation for the full list of functionality.
p.drawString(100, 100, "Hello world.")
# Close the PDF object cleanly.
p.showPage()
p.save()
# Get the value of the StringIO buffer and write it to the response.
response.write(temp.getvalue())
return response
zip: 标准库zipfile 模块
tar:标准库 tarfile 模块
图表库:matplotlib pygraphviz
RSS内容聚合器应用框架
为了在您的Django站点中激活syndication feeds, 添加如下的 URLconf:
from django.conf.urls.defaults import *
from mysite.feeds import LatestEntries, LatestEntriesByCategory
feeds = {
'latest': LatestEntries,
'categories': LatestEntriesByCategory,
}
urlpatterns = patterns('',
# ...
(r'^feeds/(?P<url>.*)/$', 'django.contrib.syndication.views.feed',
{'feed_dict': feeds}),
# ...
)
#简单的Feed
from django.contrib.syndication.feeds import Feed
from mysite.blog.models import Entry
class LatestEntries(Feed):
title = "My Blog"
link = "/archive/"
description = "The latest news about stuff."
def items(self):
return Entry.objects.order_by('-pub_date')[:5]
同时发布Atom and RSS
from django.contrib.syndication.feeds import Feed
from django.utils.feedgenerator import Atom1Feed
from mysite.blog.models import Entry
class RssLatestEntries(Feed):
title = "My Blog"
link = "/archive/"
description = "The latest news about stuff."
def items(self):
return Entry.objects.order_by('-pub_date')[:5]
class AtomLatestEntries(RssLatestEntries):
feed_type = Atom1Feed
#URLconf：
from django.conf.urls.defaults import *
from myproject.feeds import RssLatestEntries, AtomLatestEntries
feeds = {
'rss': RssLatestEntries,
'atom': AtomLatestEntries,
}
urlpatterns = patterns('',
# ...
(r'^feeds/(?P<url>.*)/$', 'django.contrib.syndication.views.feed',
{'feed_dict': feeds}),
# ...
)
Sitemap 框架
安装
要安装 sitemap 应用程序, 按下面的步骤进行:
1将 'django.contrib.sitemaps' 添加到您的 INSTALLED_APPS 设置中.
2确保 'django.template.loaders.app_directories.load_template_source' 在您的 TEMPLATE_LOADERS 设置中。 默认情况下它在那里, 所以, 如果你已经改变了那个设置的话, 只需要改回来即可。
3确定您已经安装了 sites 框架 (参见第djanbook 14章).
URLconf 中添加这一行:
(r'^sitemap\.xml$', 'django.contrib.sitemaps.views.sitemap', {'sitemaps': sitemaps})
Sitemap 类:
from django.contrib.sitemaps import Sitemap
from mysite.blog.models import Entry
class BlogSitemap(Sitemap):
changefreq = "never"
priority = 0.5
def items(self):
return Entry.objects.filter(is_draft=False)
def lastmod(self, obj):
return obj.pub_date
通知Google:
当你的sitemap变化的时候，你会想通知Google，以便让它知道对你的站点进行重新索引。 框架就提供了这样的一个函数：
django.contrib.sitemaps.ping_google()