django上传下载大文件 - cmsd

django上传下载大文件

2014-10-30 21:50  cmsd  阅读(793)  评论(0)  编辑  收藏  举报

上传

def upFile(file):
    upload_dir = \'/tmp/upload/%s\' % username
    if request.method == \'POST\':
        upload_file = request.FILES.get(\'file\', None)

        if upload_file:
            if not os.path.exists(upload_dir):
                os.makedirs(upload_dir)
            filename = \'%s/%s\' % (upload_dir, upload_file.name)
            f = open(filename, \'wb\')
            for chunk in upload_file.chunks():
                f.write(chunk)
            f.close()

 

 

下载

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()
    temp.seek(0)
    return response

 

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