CODEWITHSUNDEEP
pythonflaskhttp-status-code-405
Kernel_Handler
Kernel_Handler

Reputation: 21

Flask HTTP Method Not Allowed Message

from flask import Flask, render_template,request

app = Flask(__name__)

@app.route('/',methods=['post'])
def main():
    if (request.method=="POST"):
        text=request.form('write')
        if(text==None):
            text=""
    else:
        text=""
    return render_template('form.html',text=text)
if __name__ == "__main__":
    app.run(debug=True)

I want to receive only POST method. So I set method option to methods=["post"]. But it always sends HTTP 405 Not Allowed Method error.

<html>
  <head>
    <title>Using Tag</title>
  </head>
  <body>
    <form method="POST">
    <input type="text" name="write">
    <input type="submit">
    </form>
    {{ text }}
  </body>
</html>

I want to know reason why this application only sends HTTP 405 response.

Upvotes: 0

Views: 761

Answers (1)

arshovon
arshovon

Reputation: 13651

To access the HTML form from / path you need to enable both GET and POST request in that route. Otherwise when you try to access the root path / from your browser, you will get the HTTP Method not allowed error.

app.py:

from flask import Flask, render_template, request

app = Flask(__name__)


@app.route('/', methods=['POST', 'GET'])
def main():
    text = ""
    if request.method == "POST":
        text = request.form['username']
    return render_template('form.html', text=text)


if __name__ == "__main__":
    app.run(debug=True)

templates/form.html:

<html>
<head>
    <title>Using Tag</title>
</head>
<body>
<form method="POST">
    <input type="text" name="write">
    <input type="submit">
</form>
{{ text }}
</body>
</html>

Output:

output

Explanation (Updated):

  • To access the form value use request.form['INPUT_FIELD_NAME'].
  • We are making GET and POST requests to the / route. So, we set GET and POST requests in the methods options of the / route. When we are viewing the page using the browser, we make GET request to that page. When we submit the form, we make POST request to that page. In this case, we are storing the form value in the text variable and pass the value to the template. For GET request we are showing the empty text value.

The above snippet is the same as the following snippet:

from flask import Flask, render_template, request

app = Flask(__name__)


@app.route('/', methods=['POST', 'GET'])
def main():
    if request.method == "POST":
        text = request.form['username']
        return render_template('form.html', text=text)
    elif request.method == "GET":
        return render_template('form.html', text="")


if __name__ == "__main__":
    app.run(debug=True)

References:

Upvotes: 2

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