Sending data from HTML form to a Python script in Flask

Question

I have the code below in my Python script:

def cmd_wui(argv, path_to_tx):
    \"\"\"Run a web UI.\"\"\"
    from flask import Flask, flash, jsonify, render_t         


        

Answer 1

You need a Flask view that will receive POST data and an HTML form that will send it.

from flask import request

@app.route('/addRegion', methods=['POST'])
def addRegion():
    ...
    return (request.form['projectFilePath'])

<form action="{{ url_for('addRegion') }}" method="post">
    Project file path: <input type="text" name="projectFilePath"><br>
    <input type="submit" value="Submit">
</form>

Answer 2

The form tag needs two attributes set:

1. action: The URL that the form data is sent to on submit. Generate it with url_for. It can be omitted if the same URL handles showing the form and processing the data.
2. method: Whether to submit the data as a query string (GET) or form data (POST).

The input tag needs a name parameter.

Add a view to handle the submitted data, which is in request.form under the same key as the input's name.

@app.route('/handle_data', methods=['POST'])
def handle_data():
    projectpath = request.form['projectFilepath']
    # your code
    # return a response

Set the form's action to that view's URL using url_for:

<form action="{{ url_for('handle_data') }}" method="post">
    <input type="text" name="projectFilepath">
    <input type="submit">
</form>