Internal server error Flask

Question

First time learning Flask and I am trying to build things following a tutorial. I am getting this message in my browser when I input this url:

http://127.0.0.1:5000/index 

127.0.0.1 - - [16/Jun/2014 19:37:41] "GET /index HTTP/1.1" 500 -

Internal Server Error

The server encountered an internal error and was unable to complete your request. Either the server is overloaded or there is an error in the application.

I'm not sure why I am getting this error. Could someone help me out and tell me why? I am new to Flask and web development

code:

from flask import Flask, request, make_response, redirect, render_template
from flask.ext.script import Manager
from flask.ext.bootstrap import Bootstrap


app = Flask(__name__)
manager = Manager(app)
bootstrap = Bootstrap(app)

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

@app.route('/user/<name>')
def user(name):
    return render_template('user.html', name = name)

if __name__ == '__main__':
    #app.run(debug = True)
    manager.run()

index.html:

{% extends "base.html" %}

{% block title %} Index {% block title %}

{% block head %}
    <!-- Uses super() to retain the original contents-->
    {{ super() }}
    <style type="text/css">

    </style>
{% endblock %}  
{% block body %}
<h1>Hello, World!</h1>
{% endblock %}

This is my project structure:

/Flask_0_11
   /templates
      base.html
      index.html
      user.html
   hello.py

Answer 1

First of all try to run the app using

python manage.py runserver -d

This will run your flask app in debug mode showing the errors encountered in your app making correction easily.

Secondly,there may be error due to no WTF_CSRF_ENABLED = True with SECRET_KEY in your config file.

Answer 2

There's a template syntax error in your index.html.

The title block should be closed with {% endblock %}:

{% block title %} Index {% endblock %}

You can turn on the DEBUG configuration for debugging. Because you use Flask-Script, you can pass the -d option to the runserver command.

e.g.

python hello.py runserver -d