发送 html 表单到 flask 应用程序后如何接收数据？
[英]How to receive data back after sending a html form to flask app?
问题描述
I have a HTML site which contains a signup form and login form, the signup and login work as intended in terms of the database - the data is sent to flask and flask updates the database after verifying the data.
我有一个 HTML 网站，其中包含一个注册表单和登录表单，注册和登录按数据库的预期工作 - 数据发送到 flask，flask 在验证数据后更新数据库。
In terms of the login page I have used flask to check if the data sent by the form matches the database, it checks the database using SQL and currently I just have flask returning a page which says 'username and password correct' however I'd like to (correct me if there is a better way please) return a bool value eg validLogin as True but I'm not sure how to receive and process this on the HTML/javascript side.在登录页面方面，我使用 flask 检查表单发送的数据是否与数据库匹配，它使用 SQL 检查数据库，目前我只有 flask 返回一个页面，上面写着“用户名和密码正确”但是我会喜欢（请纠正我，如果有更好的方法）返回一个 bool 值，例如 validLogin 为 True，但我不确定如何在 HTML/javascript 端接收和处理它。
I searched around and saw people returned using a dictionary in flask through a built in package known as jsonify but I'm not sure how to 'catch' this data.我四处搜索，看到人们使用 flask 中的字典返回，通过内置的 package 称为 jsonify，但我不确定如何“捕获”此数据。 -> if my data is correct I want to be able to return something like: {"validLogin:": True} then catch this using javascript to allow the user to be logged in. -> 如果我的数据是正确的，我希望能够返回如下内容： {"validLogin:": True}然后使用 javascript 捕获它以允许用户登录。
1 个解决方案
解决方案1
-1 2023-01-14 09:05:28
you can do this by jinja2:您可以通过 jinja2 进行此操作：
# in your python file
from flask import reander_template
#............
@app.route("/...", methods=["GET", "POST"])
def check():
#check something...
validLogin=True
return render_template("example.html", validLogin=validlogin)
and和
# in /templates/example.html
<!DOCTYPE html>
<html>
<body>
{% if validLogin %}
<p>login is valid</p>
{% else %}
<p>login is not valid</p>
{% endif %}
</body>
</html>
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