是否可以制作一个zip归档文件并提供下载,但仍不将文件保存到硬盘驱动器?
是否可以制作一个zip归档文件并提供下载,但仍不将文件保存到硬盘驱动器?
Answers:
要触发下载,您需要设置Content-Disposition
标题:
from django.http import HttpResponse
from wsgiref.util import FileWrapper
# generate the file
response = HttpResponse(FileWrapper(myfile.getvalue()), content_type='application/zip')
response['Content-Disposition'] = 'attachment; filename=myfile.zip'
return response
如果您不想将文件放在磁盘上,则需要使用 StringIO
import cStringIO as StringIO
myfile = StringIO.StringIO()
while not_finished:
# generate chunk
myfile.write(chunk)
您也可以选择设置Content-Length
标头:
response['Content-Length'] = myfile.tell()
FileWrapper
,它成功了。
您将更高兴创建一个临时文件。这样可以节省大量内存。当您同时拥有一个或两个以上用户时,您会发现节省内存非常重要。
但是,您可以写入StringIO对象。
>>> import zipfile
>>> import StringIO
>>> buffer= StringIO.StringIO()
>>> z= zipfile.ZipFile( buffer, "w" )
>>> z.write( "idletest" )
>>> z.close()
>>> len(buffer.getvalue())
778
“缓冲区”对象类似于具有778字节ZIP存档的文件。
为什么不制作tar文件呢?像这样:
def downloadLogs(req, dir):
response = HttpResponse(content_type='application/x-gzip')
response['Content-Disposition'] = 'attachment; filename=download.tar.gz'
tarred = tarfile.open(fileobj=response, mode='w:gz')
tarred.add(dir)
tarred.close()
return response
content_type=
代替mimetype=
from django.db import models
class PageHeader(models.Model):
image = models.ImageField(upload_to='uploads')
from django.http import HttpResponse
from StringIO import StringIO
from models import *
import os, mimetypes, urllib
def random_header_image(request):
header = PageHeader.objects.order_by('?')[0]
image = StringIO(file(header.image.path, "rb").read())
mimetype = mimetypes.guess_type(os.path.basename(header.image.name))[0]
return HttpResponse(image.read(), mimetype=mimetype)
def download_zip(request,file_name):
filePath = '<path>/'+file_name
fsock = open(file_name_with_path,"rb")
response = HttpResponse(fsock, content_type='application/zip')
response['Content-Disposition'] = 'attachment; filename=myfile.zip'
return response
您可以根据需要替换zip和内容类型。
fsock = open(filePath,"rb")
与内存中的tgz存档相同:
import tarfile
from io import BytesIO
def serve_file(request):
out = BytesIO()
tar = tarfile.open(mode = "w:gz", fileobj = out)
data = 'lala'.encode('utf-8')
file = BytesIO(data)
info = tarfile.TarInfo(name="1.txt")
info.size = len(data)
tar.addfile(tarinfo=info, fileobj=file)
tar.close()
response = HttpResponse(out.getvalue(), content_type='application/tgz')
response['Content-Disposition'] = 'attachment; filename=myfile.tgz'
return response