[Gambas-user] HTTP Form
T Lee Davidson
t.lee.davidson at gmail.com
Tue May 17 00:20:00 CEST 2022
On 5/16/22 11:49, Gianluigi wrote:
> No, I don't mean 'opening the browser' but writing in the login form
> in order to access the site, otherwise what is the point of
I didn't mean opening the browser either. I meant displaying the login form as a browser would. HttpForm is not designed to do
that. It is not a graphical control.
The Form provided by gb.qt4 and the WebForm provided by gb.web.gui are graphical controls designed to parent other controls and
display visually to the user.
HttpForm is merely a HTTP communication tool based on HttpClient. It displays nothing. It does not write into a form. It simply
posts form data to a form submission handler.
The purpose of HttpForm.Add is to make it easier to format the data sent in the body of a POST operation. Look at the signature
Sub Post ( ContentType As String, Data As String [ , Headers As String, TargetFile As String ] )
To submit a login name and a password to a form submission handler, based on this example, we would need to format the Data
"login=myloginname&password=mypassword" ' Of course myloginname and mypassword should be the correct login credentials.
HttpForm makes it easy to craft that Data string using:
> if it were possible, I would appreciate an example where I have to
> respond in order to gain access and the code to do so:-P
If you want an application that will display a website's login form, allow you to fill it in & submit it, and then grant access
if your credentials are correct, then use a web browser. Or, code something up with WebView (gb.qt5.webview). HttpForm will not
> If I reread what you write here
>> In this example, since the location of the page containing the form and the "action" URL are the same, the server determines
>> whether to send the HTML form or to process the form data based on the HTTP method (ie. GET or POST) used by the client.
>> HttpForm.Submit is a POST operation.
> It would be impossible to create in localhost a working example as I would like.
> Did I finally understand correctly what you had explained well, and
> what I had not grasped on first reading?
No, I don't think you did. What I wrote above, which you quoted, would be true regardless of the location of the server (local
or remote) as long as it used the same code.
What is impossible is: To create a working example, that will display an interactive login form from a website, using HttpForm -
that is not its purpose.
What is possible is: To programmatically post login credentials, and login, to a website using HttpForm just as it is possible
More information about the User