Your request object contains many fields of information - you can access the query string and the headers as well as individual parameters entered into forms using the GET or the POST methods, or both. There are various layers of dispatch of requests (we can come back to these later) - just look at the example at [here] for our initial example; template is [here].

All the (form) field names and their values:

  fvals = ""
  for name in request.values:
    fvals += name + ": "+ request.values.get(name)

All the elements in the request object:

  fields = ""
  for field in dir(request):
    fields += field + ": " + "\n"

Rendered into the template:

  render_template('requestresponse.html',
    available = fields,
    filled = fvals,
    names = ", ".join(request.values),
    query = request.query_string,
    agent = request.headers.get('User-Agent'))

Here's the output:



When collecting form parameters:
request.args: If you want the parameters in the URL (as per GET)
request.form: If you want the info in the body (as per POST)
request.values: If you want both

Note that request.data isn't filled in from form completion - it's where data comes as a 'fallback' if it's not in a name=value format.

And to control routing, you can use a decorator parameter such as
  @app.route('/add', methods=['POST'])
or
  @app.route('/login', methods=['GET', 'POST'])
(written 2015-10-11)

 Y307 - The Flask micro webdevelopment framework for Python
  [4527] Hello Flask world / Python web micro framework - (2015-10-11)
  [4528] Routing in Flask - (2015-10-11)
  [4529] Flask - calling in the templating engine - (2015-10-11)
  [4531] Jinja2 - Flask templating - (2015-10-11)
  [4532] Flask - first forms and responses with wtforms - (2015-10-12)
  [4533] Sessions in flask - (2015-10-13)
  [4534] Flask - complete MVC site to navigate around a data set - (2015-10-13)
  [4538] Flask and unittest - hello web app test world - (2015-10-15)
  [4540] Unittest of a Flask application including forms - (2015-10-15)

Back to Flask - calling in the templating engine

Previous and next or Horse's mouth home

Forward to Jinja2 - Flask templating

Requests in Flask
Day trip to Lancaster
What does Tcl do if you try to run a command that is not defined?