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()

import os, tempfile, zipfilefrom django.http import HttpResponsefrom django.core.servers.basehttp import FileWrapperdef 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 responsedef 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