flask python werkzeug

Get the data received in a Flask request


I want to be able to get the data sent to my Flask app. I’ve tried accessing but it is an empty string. How do you access request data?

from flask import request

@app.route("", methods=['GET', 'POST'])
def parse_request():
    data =  # data is empty
    # need posted data here

The answer to this question led me to ask Get raw POST body in Python Flask regardless of Content-Type header next, which is about getting the raw data rather than the parsed data.


    The docs describe the attributes available on the request object (from flask import request) during a request. In most common cases will be empty because it’s used as a fallback: Contains the incoming request data as string in case it came with a mimetype Flask does not handle.

    • request.args: the key/value pairs in the URL query string
    • request.form: the key/value pairs in the body, from a HTML post form, or JavaScript request that isn’t JSON encoded
    • request.files: the files in the body, which Flask keeps separate from form. HTML forms must use enctype=multipart/form-data or files will not be uploaded.
    • request.values: combined args and form, preferring args if keys overlap
    • request.json: parsed JSON data. The request must have the application/json content type, or use request.get_json(force=True) to ignore the content type.

    All of these are MultiDict instances (except for json). You can access values using:

    • request.form['name']: use indexing if you know the key exists
    • request.form.get('name'): use get if the key might not exist
    • request.form.getlist('name'): use getlist if the key is sent multiple times and you want a list of values. get only returns the first value.


    • What decides if a key exists or not for a request.form | Where does that dictionary get populated from

      – Sai

      Mar 18 at 9:58

    • The form where you are posting from

      – pee2pee

      Jul 28 at 9:21


    To get the raw data, use This only works if it couldn’t be parsed as form data, otherwise it will be empty and request.form will have the parsed data.

    from flask import request



      For URL query parameters, use request.args.

      search = request.args.get("search")
      page = request.args.get("page")

      For posted form input, use request.form.

      email = request.form.get('email')
      password = request.form.get('password')

      For JSON posted with content type application/json, use request.get_json().

      data = request.get_json()