Python 从 Flask 路由中的 URL 获取变量
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Get a variable from the URL in a Flask route
提问by Ben J.
I have a number of URLs that start with landingpageand end with a unique id. I need to be able to get the id from the URL, so that I can pass some data from another system to my Flask app. How can I get this value?
我有许多landingpage以唯一 ID开头和结尾的 URL 。我需要能够从 URL 获取 id，以便我可以将一些数据从另一个系统传递到我的 Flask 应用程序。我怎样才能得到这个值？
http://localhost/landingpageA
http://localhost/landingpageB
http://localhost/landingpageC
采纳答案by davidism
This is answered in the quickstartof the docs.
这在文档的快速入门中得到了回答。
You want a variable URL, which you create by adding <name>placeholders in the URL and accepting corresponding namearguments in the view function.
您需要一个可变 URL，您可以通过<name>在 URL 中添加占位符并name在视图函数中接受相应参数来创建它。
@app.route('/landingpage<id>') # /landingpageA
def landing_page(id):
...
More typically the parts of a URL are separated with /.
更典型的是，URL 的各个部分用 分隔/。
@app.route('/landingpage/<id>') # /landingpage/A
def landing_page(id):
...
Use url_forto generate the URLs to the pages.
使用url_for生成的URL的网页。
url_for('landing_page', id='A')
# /landingpage/A
You could also pass the value as part of the query string, and get it from the request, although if it's always required it's better to use the variable like above.
您也可以将值作为查询字符串的一部分传递，并从 request 中获取它，但如果总是需要它，最好使用上述变量。
from flask import request
@app.route('/landingpage')
def landing_page():
id = request.args['id']
...
# /landingpage?id=A
