Question

I'm trying to get used to the Flask API and I'm creating a simple page with 1 form which uses POST method.

Instead when I look at the Flask output I can see that any time I try to open the /configure view Flask receives a GET method instead and returns Method not allowed on the view.

test.py -

from flask import Flask, request, session, g, redirect, url_for, \
    abort, render_template, flash
import dude

app = Flask(__name__)


@app.route('/')
def hello():
    output = None
    if retval:
        output = "True"
    elif retval == False:
        output = "False" + error
    return render_template('index.html', output=output)

@app.route('/configure', methods=['POST'])
def configure():
    hostname = request.form['hostname']
    if hostname in ip_dict:
        _info.append(hostname)
        flash('good job')
    else:
        flash('Host name not in the DNS system')
    return render_template('configure.html')

if __name__== "__main__":
    WB = dude.Dude()
    retval, error, ip_dict = WB.get_ips()
    app.run(debug=True)

index.html

<!doctype html>
<title>configurator</title>
<link rel=stylesheet type=text/css href="{{ url_for('static', filename='style.css') }}">
<div class=page>
    <h1>Configurator</h1>
    <div class=metanav>
        <p>{{ output }}</p>
        <a href="{{ url_for('configure') }}">Configure</a>
    </div>
    {% for message in get_flashed_messages() %}
        <div class=flash>{{ message }}</div>
    {% endfor %}
    {% block body %}{% endblock %}
</div>

configure.html

{% extends "index.html" %}
{% block body %}
    <h1>Configure</h1>
    <form action="{{ url_for('configure') }}" method=post class=hostname>
    <d1>
        <dt>Host name:
        <dd><input type=text name=hostname size=15>
        <dd><input type=submit value=Submit>
    </d1>
    </form>
    {% for message in get_flashed_messages() %}
        <div class=flash>{{ message }}</div>
    {% endfor %}
</div>
{% endblock %}

and the console output from Flask

127.0.0.1 - - [04/Apr/2016 19:24:25] "GET /configure HTTP/1.1" 405 -

UPDATE

I found my mistake. I am rendering template index.html in a place where I should be instead rendering configure.html. After this in configure() I am rendering a template where instead I should redirect.

This is how the new methods look like.

@app.route('/')
def hello():
    output = None
    if retval:
        output = "True"
    elif retval == False:
        output = "False" + error
    return render_template('configure.html', output=output)

@app.route('/comeon', methods=['POST'])
def configure():
    hostname = request.form['hostname']
    if hostname in ip_dict:
        _info.append(hostname)
        flash('good job')
    else:
        flash('Host name not in the DNS system')
    return redirect(url_for('hello'))

Answer 1

Then you are trying to open /configure in browser it by defaults uses GET method. Since you've specified only POST for that url you are getting error.

And you have some problems with your forms.

render_template('configure.html')

You should pass some arguments such as hostname since you are trying to use it in template <dd><input type=text name=hostname size=15>.

And this is incorrect syntax. It should be instead:

<dd><input type=text name={{ hostname }} size=15>

And so on.

Method Not Allowed. Flask receives GET instead of POST

1 个答案: