How to validate URL parameters in Flask

You can get flask to validate the parameters and throw an error automatically if you are willing to switch from URL parameters (i.e. anything after the '?' symbol in the URL) to path parameters (i.e. anything that is in the Path HTTP header, or the part of the URL after the first '/' and abefore the '?').

Your example could look like this:

@app.route('/post/<int:node_id>/<float:lat>/<float:lng>', methods=['POST'])def process_post_request(node_id, lat, lng):    # do some work    return your_result

Then you could send request to URL that would look for example like this: http://example.com/post/1234/-11.45/21.34

You can find more about this here: http://flask.pocoo.org/docs/0.12/quickstart/#variable-rules

For securing access you can use some of the example snippets here: http://flask.pocoo.org/snippets/category/authentication/

I would recommend restricting access to HTTPS only and using the basic auth if you are just playing around. This is something you can do with a simple decorator as described here: http://flask.pocoo.org/snippets/8/

You will get a prompt in your browser asking you for username and password and browser will remember it for the duration of the session. Alternatively, you can set the username and password in base64 encoded form in the Authorization header: https://en.wikipedia.org/wiki/Basic_access_authentication