django实现文件下载

def file_download(request):

    def file_iterator(file_name, chunk_size=512):

        with open(file_name) as f:

            while True:

                c = f.read(chunk_size)

                if c:

                    yield c

                else:

                    break

    the_file_name = os.path.join(os.path.split(os.getcwd())[0],r"silvergrd_web\UserImport.csv")

    print the_file_name

    response = StreamingHttpResponse(file_iterator(the_file_name))

    response["Content-Type"] = 'application/octet-stream'

    response["Content-Disposition"] = '''attachment; filename="UserImport.csv"'''

    return response