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finance - cs50 财务，加载到服务器时找不到 404 错误，注册时出现 500 内部服务器错误

问题描述

每当我在运行烧瓶后第一次加载到网站时，我都会收到“404 not found”错误，我不知道如何将其更改为仅显示登录页面。

当我尝试注册一个新用户时，信息确实会被记录并在数据库中散列，但我收到一个 500 内部服务器错误，如果我使用登录页面，我只能访问主页。我不确定我应该如何解决这个问题，所以非常感谢任何帮助。

应用程序.py（登录）

@app.route("/login", methods=["GET", "POST"])
def login():
    """Log user in"""

    # Forget any user_id
    session.clear()

    # 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]["hash"], request.form.get("password")):
            return apology("invalid username and/or password", 403)

        # Remember which user has logged in
        session["user_id"] = rows[0]["id"]

        # Redirect user to portfolio page
        return redirect("/portfolio")

    # User reached route via GET (as by clicking a link or via redirect)
    else:
        return render_template("login.html")

application.py（注册）

@app.route("/register", methods=["GET", "POST"])
def register():
    """Register user"""

    # Forget any user_id
    session.clear()

    # 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)

        # Ensure confirm password is submitted        
        elif not request.form.get("confirm-password"):
            return apology("must confirm password", 403)

        # if confirm password does not match password
        elif request.form.get("password") != request.form.get("confirm-password"):
            return apology("must match new password", 403)

        # update database for username and hash new password
        rows = db.execute("INSERT INTO users (username, hash) VALUES(:username, :hash)", 
        username=request.form.get("username"), hash=generate_password_hash(request.form.get("password")))

        # Give user id number
        session["user_id"] = rows[0]["id"]

        # Redirect user to portfolio page
        return redirect("/portfolio")

    # User reached route via GET (as by clicking a link or via redirect)
    else:
        return render_template("register.html")

对于 register.html

{% extends "layout.html" %}

{% block title %}
    Register
{% endblock %}

{% block main %}
    <form action="/register" method="post">
        <div class="form-group">
            <input autocomplete="off" autofocus class="form-control" name="username" 
            placeholder="Username" type="text">
        </div>
        <div class="form-group">
            <input class="form-control" name="password" placeholder="Password" type="password">
        </div>
        <div class="form-group">
            <input class="form-control" name="confirm-password" placeholder="Confirm Password" 
            type="password">
        </div>
        <button class="btn btn-primary" type="submit">Register</button>
    </form>
{% endblock %}

标签： financecs50internal-server-error

解决方案

没关系，我在注册部分找到了它。

我拿出了这条线

# update database for username and hash new password
        rows = db.execute("INSERT INTO users (username, hash) VALUES(:username, :hash)", 
        username=request.form.get("username"), hash=generate_password_hash(request.form.get("password")))

我决定将我的“确认密码”重命名为“确认密码”，只是为了保持代码中的某种程度的相似性。但更重要的是，当我改用这些代码行时，它起作用了：

 # if confirm password does not match password
        elif request.form.get("password") != request.form.get("confirm_password"):
            return apology("password does not match")

        # Hash password / Store password hash_password =
        hashed_password = generate_password_hash(request.form.get("password"))

        # Add user to database
        result = db.execute("INSERT INTO users (username, hash) VALUES(:username, :hash)",
                username = request.form.get("username"),
                hash = hashed_password)

        if not result:
            return apology("The username is already taken")

        rows = db.execute("SELECT * FROM users WHERE username = :username",
                  username = request.form.get("username"))

我最近还发现，如果我这样做是因为我想让 index(portfolio link) 与 /(homepage link) 分开：

@app.route("/")
def start():
    return render_template("login.html")

在 @app.route(/index) 部分之前

另外，我添加到 layout.html 的第 29 行

<a class="navbar-brand" href="/"><span class="blue">C</span><span class="red">$</span><span class="yellow">5</span><span class="green">0</span> <span class="red">Finance</span></a>

之前和之后的这些附加行。这样当我在单击主页按钮后已经登录时，它不会带我进入登录页面：

            {% if session.user_id %}
                <a class="navbar-brand" href="/portfolio"><span class="blue">C</span><span class="red">$</span><span class="yellow">5</span><span class="green">0</span> <span class="red">Finance</span></a>
            {% else %}
                <a class="navbar-brand" href="/"><span class="blue">C</span><span class="red">$</span><span class="yellow">5</span><span class="green">0</span> <span class="red">Finance</span></a>
            {% endif %}

我停止了 404 not found 错误

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