Question

我在使用python Flask框架运行我的应用时遇到错误。在登录表单中，执行 validateLogin 操作已在 app.py 中注册。我确保我的商店程序是正确的。谢谢你的帮助！

在 app.py ：

中

from flask import Flask, render_template, json, request
from flask.ext.mysql import MySQL
from werkzeug import generate_password_hash, check_password_hash

mysql = MySQL()
app = Flask(__name__)

# MySQL configurations
app.config['MYSQL_DATABASE_USER'] = 'root'
app.config['MYSQL_DATABASE_PASSWORD'] = '12345'
app.config['MYSQL_DATABASE_DB'] = 'BucketList'
app.config['MYSQL_DATABASE_HOST'] = 'localhost'
mysql.init_app(app)


@app.route('/')
def main():
    return render_template('index.html')

@app.route('/showSignUp')
def showSignUp():
    return render_template('signup.html')


@app.route('/signUp',methods=['POST','GET'])
def signUp():
    try:
        _name = request.form['inputName']
        _email = request.form['inputEmail']
        _password = request.form['inputPassword']

        # validate the received values
        if _name and _email and _password:

            # All Good, let's call MySQL

            conn = mysql.connect()
            cursor = conn.cursor()
            _hashed_password = generate_password_hash(_password)
            cursor.callproc('sp_createUser',(_name,_email,_hashed_password))
            data = cursor.fetchall()

            if len(data) is 0:
                conn.commit()
                return json.dumps({'message':'User created successfully !'})
            else:
                return json.dumps({'error':str(data[0])})
        else:
            return json.dumps({'html':'<span>Enter the required fields</span>'})

    except Exception as e:
        return json.dumps({'error':str(e)})
    finally:
        cursor.close() 
        conn.close()

@app.route('/showSignIn')
def showSignin():
    return render_template('signin.html')

@app.route('/validateLogin',methods=['POST'])
def validateLogin():
    try:
        _username = request.form['inputEmail']
        _password = request.form['inputPassword']

        # connect to mysql

        con = mysql.connect()
        cursor = con.cursor()
        cursor.callproc('sp_validateLogin',(_username))
        data = cursor.fetchall()

        if len(data) > 0:
            if check_password_hash(str(data[0][3]),_password):
                session['user'] = data[0][0]
                return redirect('/userHome')
            else:
                return render_template('error.html',error = 'Wrong Email address or Password.')
        else:
            return render_template('error.html',error = 'Wrong Email address or Password.')


    except Exception as e:
        return render_template('error.html',error = str(e))
    finally:
        cursor.close()
        conn.close()

@app.route('/userHome')
def userHome():
    return render_template('userHome.html')
if __name__ == "__main__":
    app.run(port=5000)

signin.html ：

<!DOCTYPE html>
<html lang="en">
  <head>
    <title>Python Flask Bucket List App</title>


    <link href="http://getbootstrap.com/dist/css/bootstrap.min.css" rel="stylesheet">

    <link href="http://getbootstrap.com/examples/jumbotron-narrow/jumbotron-narrow.css" rel="stylesheet">
    <!-- <link href="../static/css/signup.css" rel="stylesheet"> -->
    <script src="../static/js/jquery-1.11.2.js"></script>

  </head>

  <body>

    <div class="container">
      <div class="header">
        <nav>
          <ul class="nav nav-pills pull-right">
            <li role="presentation" ><a href="/">Home</a></li>
            <li role="presentation" class="active"><a href="#">Sign In</a></li>
            <li role="presentation" ><a href="/showSignUp">Sign Up</a></li>
          </ul>
        </nav>
        <h3 class="text-muted">Python Flask App</h3>
      </div>

      <div class="jumbotron">
        <h3>Bucket List Sign In</h3>
        <form role="form" action="/validateLogin" method="post">
        <div class="form-group">
          <label for="inputEmail" class="sr-only">Email address</label>
          <input type="email" name="inputEmail" id="inputEmail" class="form-control" placeholder="Email address" required autofocus>
        </div>
        <div class="form-group">
          <label for="inputPassword" class="sr-only">Password</label>
          <input type="password" name="inputPassword" id="inputPassword" class="form-control" placeholder="Password" required>
        </div>

        <button id="btnSignIn" class="btn btn-lg btn-primary btn-block" type="submit">Sign in</button>
      </form>
      </div>



      <footer class="footer">
        <p>&copy; Company 2015</p>
      </footer>

    </div>
  </body>
</html>

在 userHome.html ：

中

<!DOCTYPE html>
<html lang="en">

<head>
    <title>Python Flask Bucket List App</title>


    <link href="http://getbootstrap.com/dist/css/bootstrap.min.css" rel="stylesheet">

    <link href="http://getbootstrap.com/examples/jumbotron-narrow/jumbotron-narrow.css" rel="stylesheet">
    <!-- <link href="../static/css/signup.css" rel="stylesheet"> -->


</head>

<body>

    <div class="container">
        <div class="header">
            <nav>
                <ul class="nav nav-pills pull-right">
                    <li role="presentation" class="active"><a href="/logout">Logout</a>
                    </li>
                </ul>
            </nav>
            <h3 class="text-muted">Python Flask App</h3>
        </div>

        <div class="jumbotron">
            <h1>Welcome Home !!</h1>

        </div>


        <footer class="footer">
            <p>&copy; Company 2015</p>
        </footer>

    </div>
</body>

</html>

Answer 1

您收到500内部服务器错误的事实表明您的代码中某处出现了未处理的异常。查看日志文件并打开调试（我仍然不确定您是否已完成此操作！）。启用调试后，异常回溯将很好地格式化并显示在网页中。

为什么check_password_hash()没有按预期工作？你期望它做什么？我想你的意思是它没有正确检查密码？尝试打印出从数据库返回的值，即data的值，特别是data[0][3]。

validateLogin()函数捕获所有异常，并且应该在error.html模板中显示异常。该页面正在呈现吗？

Flask获得500内部服务器错误

1 个答案: