How to get HTML Input using Python Flask

Question

I am planning to get input from an HTML Form when submitted, the input will be send over to Python. Here is the HTML File

<form method="GET">

  <div class="form-inline">
    <div class="form-group">
      <input type="email" class="line-input" name="userEmail" placeholder="Email">
    </div>
    <div class="form-group">
      <input type="password" class="line-input" name="userPassword" placeholder="Password">
    </div>
  </div>

  <div class="form-inline">
    <div class="form-group">
      <input type="email" class="line-input" name="recipientMail" placeholder="Recipient">
    </div>
    <div class="form-group">
      <input type="email" class="line-input" name="CCEmail" placeholder="CC">
    </div>
  </div>

  <div class=" form-group">
    <button type="submit" class="btn btn-light text-primary btn-block" style="margin : 20px 20px -10px 0px">Send Message</button>
  </div>

  </form>

Now I don't know the best way to do this, I tried this in Python but doesn't seem to work

@app.route('/', methods=['POST'])
def form_post():
    userEmail = request.form['userEmail']
    userPassword = request.form['userPassword']
    return userEmail, userPassword

Can anyone help me out here?

Ajax1234 · Accepted Answer · 2018-04-16 15:42:08Z

4

Change your form method from GET to POST, as your route only specifies "POST", and will not accept any other requests of a different type:

<form method="POST">

Edit: if you wish to specify both methods, ensure that your route checks for the correct type of request currently being sent when the route is triggered:

@app.route('/', methods=['POST','GET'])
def form_post():
  if flask.request.method == 'POST'
     userEmail = request.form['userEmail']
     userPassword = request.form['userPassword']
     return userEmail, userPassword
  return flask.render_template('something.html')

Note, however, that you are creating your form on the home route ('/'). It may be best to return a link to the page that has the form code:

@app.route('/')
def home():
  return 'Welcome! <a href="/login">login here</a>'

@app.route('/login', methods=['GET', 'POST']):
  if flask.request.method == 'POST'
    userEmail = request.form['userEmail']
    userPassword = request.form['userPassword']
    return flask.redirect('/')
  return flask.render_template('form_filename.html')

edited Apr 16, 2018 at 15:42

answered Apr 16, 2018 at 15:37

Ajax1234

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8 Comments

Abhishta Gatya Over a year ago

please can you add more to your answer so I know what to do next time? Maybe a link of tutorial or reference?

Ajax1234 Over a year ago

@AbhishtaGatya That is really all there is to it. Your code is perfectly fine otherwise.

Abhishta Gatya Over a year ago

What if I specify both? sorry for being needy

Ajax1234 Over a year ago

@AbhishtaGatya Please see my recent edit. I added a cleaner method of retrieving the form data.

Ajax1234 Over a year ago

@AbhishtaGatya you need to specify both so that the code will know when to access the form data structure values and when to merely serve the file. If you attempt to access the form results when the user has merely sent a GET request (simple page view) an error will occur.

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