进行一些操作返回文件,flask和django差不多,基本都是在返回response 并且对其中的返回头部写入返回文件信息

# image
def image(request):
f = open(r'C:\Users\Administrator\Desktop\反面.jpg','rb').read()
return HttpResponse(f,content_type='image/jpg')

csv

import csv
UNRULY_PASSENGERS = [146,184,235,200,226,251,299,273,281,304,203]
def to_csv(request):
response = HttpResponse(content_type='text/csv')
response['Content-Disposition'] = 'attachment; filename=ceshi.csv' # 下载csv文件名设置filename b不能中文

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

pdf

from reportlab.pdfgen import canvas
def to_pdf(request):
response = HttpResponse(content_type='application/pdf')
response['Content-Disposition'] = 'attachment; filename=ceshi_pdf.pdf'

p = canvas.Canvas(response)

p.drawString(500, 200, "Hello world.")   # 和csv一样,坐标位置是从左下角开始的

p.showPage()  
p.save()  
return response

对大型文件进行一个内存操作,如果内容不大,可以使用上面的办法

from io import BytesIO
from reportlab.pdfgen import canvas
from django.http import HttpResponse
def to_max_pdf(request):
response = HttpResponse(content_type='application/pdf')
response['Content-Disposition'] = 'attachment; filename=ceshi_max.pdf'

temp = BytesIO()           #BytesIO是编码内容保存在内存中

p = canvas.Canvas(temp)

p.drawString(100, 100, "Hello world.")

p.showPage()  
p.save()                    

response.write(temp.getvalue())  
return response