Flask文档的“样式”部分介绍了将文件流传输到客户端而不将其保存到磁盘的过程，特别是在流传输部分。基本上，您要做的是返回一个
Response包装了迭代器的完整对象：
from flask import Response# construct your app@app.route("/get-file")def get_file(): results = generate_file_data() generator = (cell for row in results for cell in row) return Response(generator, mimetype="text/plain", headers={"Content-Disposition": "attachment;filename=test.txt"})
