[英]Why is my python app continues to get a 500 Internal Server Error?
我試圖讓我的 app.py 與 MySQL 數據庫鏈接,但我不斷收到如下所示的錯誤。 我的存儲庫的鏈接在這里: https : //github.com/trhubwork/python-mysql-proj.git
我正在運行 python 3.5.1
控制台錯誤:
jquery-1.11.2.js:9659 POST [runningonlocalhost]/signUp 500 (INTERNAL SERVER ERROR)send @ jquery-1.11.2.js:9659ajax @ jquery-1.11.2.js:9210(anonymous function) @ signUp.js :4dispatch @ jquery-1.11.2.js:4665elemData.handle @ jquery-1.11.2.js:4333 signUp.js:12 Object {readyState: 4, responseText: "↵", status: 500, statusText: "INTERNAL SERVER錯誤"}
Gitbash 終端錯誤:
- 在 [localhost]:5002/ 上運行(按 CTRL+C 退出) 127.0.0.1 - - [29/Sep/2016 22:06:17] "GET / HTTP/1.1" 200 - 127.0.0.1 - - [29/ 2016 年 9 月 22:06:20] "GET /showSignUp HTTP/1.1" 200 - [2016-09-29 22:06:22,142] 應用程序中的錯誤:/signUp [POST] 上的異常回溯(最近一次調用最后一次):文件“C:\\Users\\TR\\AppData\\Local\\Programs\\Python\\Python35-32\\lib\\site-packages\\flask\\app.py”,第 1988 行,在 wsgi_app response = self.full_dispatch_request() 文件“C: \\Users\\TR\\AppData\\Local\\Programs\\Python\\Python35-32\\lib\\site-packages\\flask\\app.py”,第 1641 行,在 full_dispatch_request rv = self.handle_user_exception(e) 文件“C:\\Users\\ TR\\AppData\\Local\\Programs\\Python\\Python35-32\\lib\\site-packages\\flask\\app.py”,第 1544 行,在 handle_user_exception reraise(exc_type, exc_value, tb) 文件“C:\\Users\\TR\\AppData \\Local\\Programs\\Python\\Python35-32\\lib\\site-packages\\flask_compat.py”,第 33 行,在重新提高值文件“C:\\Users\\TR\\AppData\\Local\\Programs\\Python\\Python35-32\\ lib\\site-packages\\flask\\app.py”,第 1639 行,我 n full_dispatch_request rv = self.dispatch_request() File "C:\\Users\\TR\\AppData\\Local\\Programs\\Python\\Python35-32\\lib\\site-packages\\flask\\app.py", line 1625, in dispatch_request return self .view_functionsrule.endpoint 文件“app.py”,第 54 行,在 signUp cursor.close() 中 UnboundLocalError:分配前引用的局部變量 'cursor' 127.0.0.1 - - [29/Sep/2016 22:06:22]“POST /signUp HTTP/1.1" 500 - [2016-09-29 22:09:03,808] 應用程序錯誤:/signUp [POST] 回溯異常(最近一次調用):文件“C:\\Users\\TR\\AppData\\ Local\\Programs\\Python\\Python35-32\\lib\\site-packages\\flask\\app.py", line 1988, in wsgi_app response = self.full_dispatch_request() File "C:\\Users\\TR\\AppData\\Local\\Programs\\ Python\\Python35-32\\lib\\site-packages\\flask\\app.py”,第 1641 行,在 full_dispatch_request rv = self.handle_user_exception(e) 文件“C:\\Users\\TR\\AppData\\Local\\Programs\\Python\\Python35 -32\\lib\\site-packages\\flask\\app.py", line 1544, in handle_user_exception reraise(exc_type, exc_value, tb) 文件 "C:\\U sers\\TR\\AppData\\Local\\Programs\\Python\\Python35-32\\lib\\site-packages\\flask_compat.py”,第 33 行,重新加注值文件“C:\\Users\\TR\\AppData\\Local\\Programs\\Python \\Python35-32\\lib\\site-packages\\flask\\app.py”,第 1639 行,在 full_dispatch_request rv = self.dispatch_request() 文件“C:\\Users\\TR\\AppData\\Local\\Programs\\Python\\Python35-32 \\lib\\site-packages\\flask\\app.py", line 1625, in dispatch_request return self.view_functionsrule.endpoint 文件 "app.py", line 54, in signUp cursor.close() UnboundLocalError: local variable 'cursor' referenced分配前 127.0.0.1 - - [29/Sep/2016 22:09:03] "POST /signUp HTTP/1.1" 500 -
這是我的 app.py
from flask import Flask, render_template, json, request
from flaskext.mysql import MySQL
from werkzeug import generate_password_hash, check_password_hash
mysql = MySQL()
app = Flask(__name__)
# MySQL configurations
app.config['MYSQL_DATABASE_USER'] = 'jay'
app.config['MYSQL_DATABASE_PASSWORD'] = 'jay'
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()
if __name__ == "__main__":
app.run(port=5002)
enter code here
注冊.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>
<script src="../static/js/signUp.js"></script>
</head>
<body>
<div class="container">
<div class="header">
<nav>
<ul class="nav nav-pills pull-right">
<li role="presentation" ><a href="showHome">Home</a></li>
<li role="presentation"><a href="#">Sign In</a></li>
<li role="presentation" class="active"><a href="#">Sign Up</a></li>
</ul>
</nav>
<h3 class="text-muted">Python Flask App</h3>
</div>
<div class="jumbotron">
<h1>Bucket List App</h1>
<form class="form-signin">
<label for="inputName" class="sr-only">Name</label>
<input type="name" name="inputName" id="inputName" class="form-control" placeholder="Name" required autofocus>
<label for="inputEmail" class="sr-only">Email address</label>
<input type="email" name="inputEmail" id="inputEmail" class="form-control" placeholder="Email address" required autofocus>
<label for="inputPassword" class="sr-only">Password</label>
<input type="password" name="inputPassword" id="inputPassword" class="form-control" placeholder="Password" required>
<button id="btnSignUp" class="btn btn-lg btn-primary btn-block" type="button">Sign up</button>
</form>
</div>
<footer class="footer">
<p>© Company 2015</p>
</footer>
</div>
</body>
</html>
注冊.js
$(function(){
$('#btnSignUp').click(function(){
$.ajax({
url: '/signUp',
data: $('form').serialize(),
type: 'POST',
success: function(response){
console.log(response);
},
error: function(error){
console.log(error);
}
});
});
});
@epascarello 是對的,如果您的代碼沒有輸入if
語句,那么您甚至永遠不會創建游標。 我認為try
和finally
塊是個好主意; 只需像這樣向上移動光標:
try:
conn = mysql.connect()
cursor = conn.cursor()
_name = request.form['inputName']
_email = request.form['inputEmail']
_password = request.form['inputPassword']
# ...
# contents of the if and else statements here
# ...
except Exception as e:
return json.dumps({'error':str(e)})
finally:
cursor.close()
conn.close()
你可以這樣試試。
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 the MySQL
with closing(mysql.connect()) as conn:
with closing(conn.cursor()) as 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>'})
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