Using Ruby and Mechanize to fill in a remote login form mystery

Question

I am trying to implement a Ruby script that will take in a username and password, then proceed to fill in the account details on a login form on another website and return the then follow a link and retrieve the account history. To do this I am using the Mechanize gem. I have been following the examples here but still I cant seem to get it to work. I have simplified this down greatly to try get it to work in parts but a supposedly simple filling in a form is holding me up. Here is my code: ``` # script gets called with a username and password for the site require 'mechanize' #create a mechanize instant agent = Mechanize.new agent.get('https://mysite/Login.aspx') do |login_page| #fill in the login form on the login page loggedin_page = login_page.form_with(:id => 'form1') do |form| username_field = form.field_with(:id => 'ContentPlaceHolder1_UserName') username_field.value = ARGV[0] password_field = form.field_with(:id => 'ContentPlaceHolder1_Password') password_field.value = ARGV[1] b…

Accepted Answer

You don't need to pass `form` as an argument to `submit`. The `button` is also optional. Try using the following:

```
loggedin_page = login_page.form_with(:id => 'form1') do |form|
    username_field = form.field_with(:id => 'ContentPlaceHolder1_UserName')
    username_field.value = ARGV[0]
    password_field = form.field_with(:id => 'ContentPlaceHolder1_Password')
    password_field.value = ARGV[1]
end.submit
```

If you really do need to specify which button is used to submit the form, try this:

```
form = login_page.form_with(:id => 'form1')
username_field = form.field_with(:id => 'ContentPlaceHolder1_UserName')
username_field.value = ARGV[0]
password_field = form.field_with(:id => 'ContentPlaceHolder1_Password')
password_field.value = ARGV[1]

button = form.button_with(:id => 'ContentPlaceHolder1_btnlogin')
loggedin_page = form.submit(button)
```

Using Ruby and Mechanize to fill in a remote login form mystery

Solution

Problem