【django 学习笔记】12 输出非HTML内容

Django
拥有一些
便利的内建工具帮助你生成常见的非HTML
内
容:
RSS/Atom
聚合文件
站点地图 (
一个XML
格式文件,
最初由Google
开发,
用于给搜索引擎提示线索)
基础:
视图和MIME
类型
从一个视图返回一个非 HTML
内
容的关键是在构造一个 HttpResponse
类
时,
需要指定 mimetype
参数。 通
过改变 MIME
类型,
我们可以通知浏览器将要返回的数据是另一种类
型。
from django.http
import HttpResponse
def my_image(request):

image_data =
open(“/path/to/my/image.png”, “rb”).read()
return
HttpResponse(image_data, mimetype=”image/png”)
生成 CSV
文件
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
安装 ReportLab
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.
# S