正如标题所述，我在从 Flask 函数访问 Flask-websocket 会话时遇到问题。我意识到它们是不同的，并且可能以不同的方式存储，并尝试使用 Flask-session 库解决这个问题，但没有成功。
我制作了一些样板代码来说明我的问题。
from flask import Flask, session,render_template,url_for,redirect
from flask_socketio import SocketIO,join_room
app = Flask(__name__)
boards = {}
socketio = SocketIO(app)
app.secret_key = "temporary"
@app.route('/')
def index():
return render_template('wait.html')
@app.route('/dir')
def foo():
if "name" in session:#fails here as session is <SecureCookieSession {}> instead of {'name' : 'craig}
pass #just a filler
else:
return redirect(url_for("index"))#this line will cause to repetitively go back and forward from index to foo
@socketio.on('log')
def connection(request):
if "name" not in session:
join_room('waiting')#in my actual code the user waits for another person
session['name'] = 'craig'
socketio.emit('redirect', url_for('foo'),room= 'waiting')
else:
pass
if __name__ == '__main__':
socketio.run(app ,port=5000, debug=True)
和 html：
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
</head>
<body>
Waiting...
<script src="https://cdnjs.cloudflare.com/ajax/libs/socket.io/4.0.1/socket.io.js"></script>
<script>
const socket = io();
socket.emit("log", { data: "connection" });
socket.on('redirect', (dest) => {
window.location = dest;
});
</script>
</body>
</html>
事实证明，flask-session 确实有解决方案，我只是用错了，在我最初尝试时忘记了这两行代码：
Session(app)
socketio = SocketIO(app, manage_session=False)# I did not have the manage_session
我也用过
session.modified = True
虽然我不确定这是否绝对必要
这是更新后的服务器代码：
from flask import Flask, session, render_template, url_for, redirect
from flask_socketio import SocketIO, join_room
from flask_session import Session
app = Flask(__name__)
app.config['SECRET_KEY'] = 'temporary'
app.config['SESSION_TYPE'] = 'filesystem'
Session(app)
socketio = SocketIO(app, manage_session=False)
@app.route('/')
def index():
return render_template('wait.html')
@app.route('/dir')
def foo():
if "name" in session:
name = session['name']
return f"Hello, {name}!"
else:
return redirect(url_for("index"))
@socketio.on('log')
def connection(request):
print(session)
if "name" not in session:
join_room('waiting')
session['name'] = 'craig'
session.modified = True
socketio.emit('redirect', url_for('foo'), room='waiting')
else:
session.clear()
if __name__ == '__main__':
socketio.run(app, port=5200, debug=True)