Display HTML form data as JSON on new page using Flask


I have made a simple HTML form on a page and I would like to gather all the data from the form, convert it to JSON, then display that JSON on a new page. I don’t need or want a database to save this data, I just want it to spit out onto a new page in proper JSON format so that the person using it can copy/paste that data for something else.

I’m using Flask, here is the HTML form I made that extends another basic layout page:

{% extends "layout.html" %}
    {% block content %}
        <div class="container">
        <form action="/display" method="post" id="employForm"
        <label>First Name
          <input type="text" name="firstName" placeholder="Joe" required>
        <label>Last Name
          <input type="text" name="lastName" id="lastName" placeholder="Schmoe" required>

          <select name="department" required>
            <option value="sales">Sales</option>
            <option value="marketing">Marketing</option>
            <option value="developer">Developer</option>
            <option value="business">Business Relations</option>
            <option value="sysAdmin">Systems Administration</option>
            <option value="drone">Drone</option>
            ... goes on
      <button class="button-primary" type="submit" value="Submit" form="employForm">SUBMIT!</button>
    {% endblock %}

The form is a bit longer than that and contains several different types of form data. Here is the server side of things (the flask app I made):

from flask import Flask, render_template, request, jsonify

app = Flask(__name__)

def hello():
     return render_template('home.html')

@app.route('/display', methods=["GET", "POST"])
def display():
     result = request.form
     return render_template('display.html', result=result)

if __name__ == "__main__":

I feel like I’m close. At the moment, after I hit submit I get redirected to the display page and it prints out something like the following (specific data changes based on input answers, obviously):

ImmutableMultiDict([('startDate', u'2016-08-03'), ('employmentStatus', u'intern'), ('firstName', u'Hola'), ('lastName', u'Schmoe'), ('department', u'marketing'), ('location', u'SanFran'), ('inNYC', u'Yes'), ('requests', u'Blah blah try this.')])

I’ve done quite a bit of searching on Stack Overflow and elsewhere… the problem I’ve encountered is that they all provide examples where a person only wants to collect one or two keys off of their form, not the whole form.

Additionally, for my particular purposes I would strongly prefer that the data be returned as JSON and displayed as such on the display.html page.

For reference, here are some of the questions I looked at that didn’t quite help:

How to post data structure like json to flask?

Getting form data from html form using flask and python

Flask request and application/json content type

Send Data from a textbox into Flask?

Any guidance is much appreciated. Thank you!

Asked By: RHdev



I see you import jsonify… you could use that…

@app.route('/display', methods=["GET", "POST"])
def display():
     return jsonify(request.form)

or you could use the tojson filter in your template

{{ result | tojson }}


result = json.dumps(request.form)

I think any of those will work.

Answered By: GMarsh
def form2json():
import json
if request.method == 'POST':
    return jsonify(f)
elif request.method =='GET':
    from forms import Some_Form
    return Some_Form()

I had to first dump it into json then turn it jsonify it

Answered By: Max
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