使用 Django StreamingHttpResponse 流式传输 Excel 文件

Question

我有一个用例，我必须生成并发送记录高达 4M 的 Excel 文件，因为该文件可能很大，我想在生成文件时流式传输响应

https://docs.djangoproject.com/en/2.0/howto/outputting-csv/#streaming-large-csv-files：这正是我想要的，但是对于记录高达4M的Excel文件

这是我想以excel格式实现的csv格式的模板代码

def get_stuff():
def fetch_from_server_cursor(cursor, cursor_name, fetch_size=10000):
    while True:
        cursor.execute("FETCH {fetch_size} FROM {cursor_name}".format(fetch_size = fetch_size, cursor_name = cursor_name))
        chunk = cursor.fetchall()
        if not chunk:
            return
        yield from chunk

with transaction.atomic(), connection.cursor() as cursor:
    cursor_name = "my_cursor"
    cursor.execute(
        """
        DECLARE {cursor_name} CURSOR FOR
        SELECT field1,field2
        FROM {table_name}
        WHERE field3 = XX
        """.format(cursor_name = cursor_name,table_name = MyModel.objects.model._meta.db_table)
    )
    yield from fetch_from_server_cursor(cursor, cursor_name)

def stream_csv_view(request):
"""A view that streams a large CSV file."""
# Generate a sequence of rows. The range is based on the maximum number of
# rows that can be handled by a single sheet in most spreadsheet
# applications.
pseudo_buffer = Echo()
writer = csv.writer(pseudo_buffer)
response = StreamingHttpResponse((writer.writerow(row) for row in get_stuff()),
                                 content_type="text/csv")
response['Content-Disposition'] = 'attachment; filename="test.csv"'
return response

有人可以研究一下

get_stuff()

功能并推荐我一种更好的方法来访问数据库，这个失败了

有什么帮助吗？

Answer 1

您可以使用

django-queryset-csv

模块从查询集中导出 csv，它默认使用 StreamingHttpResponse 而不是普通的 HttpResponse。

• https://github.com/azavea/django-queryset-csv

Answer 2

这个案例你找到答案了吗？