python后端向前台返回字節流文件

python后端向前台返回字節流文件，瀏覽器訪問地址自動下載文件：

from django.http.response import  StreamingHttpResponse

# 要下載的文件路徑
 the_file_name = "record.txt"
# 這里創建返回
 response = StreamingHttpResponse(self.file_iterator(the_file_name))
# 注意格式
 response['Content-Type'] = 'application/txt'
# 注意filename 這個是下載后的名字
 response['Content-Disposition'] = 'attachment;filename="record.txt"'
 return response

　　

def file_iterator(self, file_name, chunk_size=512):
    '''
    # 用於形成二進制數據
    :param file_name:
    :param chunk_size:
    :return:
    '''
    with open(file_name, 'rb') as f:
         while True:
             c = f.read(chunk_size)
             if c:
                 yield c
             else:
                 break