Python 服务器之Django下载大文件和压缩zip文件

"""

　　@author:Peng（非原创）

　   参考:（外网）http://djangosnippets.org/snippets/365/

　　记录：开发历程

 """

import os, tempfile, zipfile
from django.http import HttpResponse
from django.core.servers.basehttp import FileWrapper


def send_file(request):
""" 
    Send a file through Django without loading the whole file into 
    memory at once. The FileWrapper will turn the file object into an 
    iterator for chunks of 8KB. 
"""
　　filename = __file__ # Select your file here. 
　　wrapper = FileWrapper(file(filename))
　　response = HttpResponse(wrapper, content_type='text/plain')
　　response['Content-Length'] = os.path.getsize(filename)
　　return response


def send_zipfile(request):
""" 
Create a ZIP file on disk and transmit it in chunks of 8KB, 
without loading the whole file into memory. A similar approach can 
be used for large dynamic PDF files. 
"""
　　temp = tempfile.TemporaryFile()
　　archive = zipfile.ZipFile(temp, 'w', zipfile.ZIP_DEFLATED)
　　for index in range(10):
　　filename = __file__ # Select your files here. 
　　archive.write(filename, 'file%d.txt' % index)
　　archive.close()
　　wrapper = FileWrapper(temp)
　　response = HttpResponse(wrapper, content_type='application/zip')
　　response['Content-Disposition'] = 'attachment; filename=test.zip'
　　response['Content-Length'] = temp.tell()　　　　# Python文件操作tell()方法：这种方法简单地返回文件的当前位置读/写指针在文件。
　　temp.seek(0)
　　return response