我有这个python代码,我试图将用户试图访问我的网站主页(例如http://example.com/)重定向到他们的个人资料页面,如果他们已登录,但我收到此异常在第13行。
RuntimeError:在请求上下文之外工作。
如果我删除第13行,我会收到一个不同的例外。
KeyError:' user_id'
from cs50 import SQL
from flask import Flask, flash, redirect, render_template, request, session
from flask_session import Session
from tempfile import mkdtemp
from werkzeug.exceptions import default_exceptions
from werkzeug.security import check_password_hash, generate_password_hash
app = Flask(__name__)
app.secret_key = "super secret key"
app.config["SESSION_TYPE"] = "filesystem"
db = SQL("sqlite:///data.db")
Session(app)
session['user_id'] = 0
@app.route("/")
def index():
if session['user_id'] != 0:
return redirect("profile/" + session['username'])
return render_template("index.html")
@app.route("/login", methods=["GET", "POST"])
def login():
"""Log user in"""
# Forget any user_id
session.clear()
session['user_id'] = 0
# User reached route via POST (as by submitting a form via POST)
if request.method == "POST":
# Ensure username was submitted
if not request.form.get("username"):
return apology("must provide username", 403)
# Ensure password was submitted
elif not request.form.get("password"):
return apology("must provide password", 403)
# Query database for username
rows = db.execute("SELECT * FROM users WHERE username = :username",
username=request.form.get("username"))
# Ensure username exists and password is correct
if len(rows) != 1 or not check_password_hash(rows[0]["passwordHash"], request.form.get("password")):
return apology("invalid username and/or password", 403)
# Remember which user has logged in
session["user_id"] = rows[0]["id"]
session["username"] = rows[0]["username"]
return redirect("/")
答案 0 :(得分:2)
session['user_id'] = 0
位于请求上下文主体之外。
您应该将if session['user_id'] != 0:
替换为if session.get('user_id',0) != 0:
,以获取会话的默认值。因此修复KeyError
然后,您不需要初始化任何会话密钥