在Flask中设置多个响应头选项

Question

我们如何在 Flask 中为标头设置多个选项。例如：我想在Cache-Control标头中设置两个选项，一个是max-age，另一个是public/private。我该如何在 Flask 中实现？目前我已经实现了以下代码。

from flask import Flask, jsonify, abort, request, json, Response

app = Flask(__name__)

book_list = ['Peaceful Warrior', 'The Monk who sold his ferrari', 'Lord of the Rings', 'Game of Thrones', 'The True Name', 'The Da Vinci Code',
            'Angels and Demons', 'Fear of Flying', 'Harry Potter and Half Blood Prince']

# create a in-memory book-store
books = [{'id': id, 'name': book} for id, book in enumerate(book_list, 1)]
@app.route('/books', methods=['GET'])
def get_books():
    if 'name' in request.args:
        req_books = [book for book in books if book['name'] == request.args['name']]
        js = json.dumps(req_books)
        resp = Response(js, status=200, mimetype='application/json')
        resp.headers['Cache-Control'] = 'public'
        resp.headers['Cache-Control'] = 'max-age=20'

    elif 'id' in request.args:
        req_books = [book for book in books if book['id'] == request.args['id']]
        js = json.dumps(req_books)
        resp = Response(js, status=200, mimetype='application/json')
        resp.headers['Cache-Control'] = 'public'
    else:
        js = json.dumps(books)
        resp = Response(js, status=200, mimetype='application/json')
        resp.headers['Cache-Control'] = 'public'

    return resp

最终，我的响应应该具有以下格式的头信息：-

Cache-Control: public
Cache-Control: max-age=20

- khirod

Answer 1

resp.headers是一个Python字典，将键'Cache-Control'映射到一个值。当您设置两次时，您正在覆盖先前设置的值。幸运的是，您可以使用这些标头的逗号分隔列表：

resp.headers['Cache-Control'] = 'public, max-age=20'

- Eric Conner